The reparation of injury in the upper part of the femur is opposed by a variety of circumstances. Fractures of the neck of the bone are almost uniformly met with in those whose powers of life have been nearly exhausted. The whole injury is confined within the synovial capsule, and the fibrous tissues which support that are unyielding, and but slightly vascular; consequently, in fracture of the neck of the femur, there occurs none of the swelling and increased vascularity of the surrounding tissues, which follow fracture of other bones, or other parts of this bone: no temporary callus can be formed; from this cause, support of the disunited parts is deficient. The head and neck of the bone are not so well supplied with bloodvessels as the other parts; those arteries which pass along the ligamentum teres are the chief support. And perhaps the influx of blood is not increased, in consequence of injury, to such a degree as in other parts; in these, when the surrounding parts are bruised or otherwise injured by fracture in their immediate vicinity, their vascular action is soon excited, the vessels ramifying on the periosteum are enlarged, and blood is poured into the bone at all points. Instead of these salutary changes, the secretion of synovia is increased, and a fluid, perhaps vitiated, surrounds the bone, and is interposed betwixt its ends. There is also difficulty in performing accurate adaptation of the broken ends, and in securing retention so long as is necessary for union; the limb has a tendency to retraction; in readjusting the apparatus, when become loose, the broken surfaces are rubbed on each other, and thus any union which may have been in progress is interfered with. In consequence of all this, union seldom takes place by bone; it has occurred, and will occur, in favourable cases, when the fibrous investment of the neck of the bone does not happen to be torn, and under good treatment. Two sketches which, through the kindness of Sir Astley Cooper, I am enabled to introduce here, show the union complete: the patient from whom this was taken had received other severe injuries, and very little attention had been paid to that of the hip. But it is an undeniable fact, that the circumstances which of a necessity follow fracture at this point are inimical to its effective reparation. The broken ends are sometimes united by fibrous tissue. Most frequently no union takes place, and the broken surfaces gradually become smooth, polished like a bit of china, and adapted to each other; a false joint is formed, but at the same time the capsular ligament, and tissues exterior to it, are thickened and strengthened, and so the unnatural motion is limited. The rough and irregular portions of the bone are absorbed, and the neck of the femur, from interstitial absorption, almost disappears; its diminished head lies in and is attached to the cotyloid cavity, and is rubbed upon by the opposed surface of the shaft. Shortening of the limb is an inevitable result: at first the power of motion is slight, and the support afforded to the body weak; in course of time the member becomes strong and useful.

Many bones are preserved and exhibited, in which fracture of the neck of the thigh-bone, with bony union, is supposed to have taken place; but there are strong grounds for suspecting that many such have not sustained actual fracture. The neck of the bone may be shortened, and set on awkwardly, and there may be masses of new osseous deposit round the neck and the trochanters. Perhaps the history of the case is known.—An old person sustains an injury of the hip by falling, or by a blow on the trochanter; great lameness ensues, and, after a confinement of many weeks, the patient begins to use the member, which, however, remains considerably shortened. But all this may have taken place, and on examination after death, the parts may have presented the appearances above alluded to, without any fracture. The change in the bone is the consequence of diseased action induced by the injury. The bloodvessels of the bone and its coverings are excited, and new osseous matter is formed at various points; at the same time, interstitial absorption of the cancellated texture of the neck gradually advances, and the bone is consequently altered in length and form. These appearances alone, therefore, do not warrant the confident belief of fracture having occurred, even though the history should seem to favour the assumption. And it ought to be recollected, that mere bruising of the parts about the hip is not unfrequently attended with inability to move the limb, with eversion of the foot, so as to relax the muscles which have suffered, and sometimes with slight apparent lengthening. This change in the form of the head and neck of the thigh-bone is not found only in old subjects. Some drawings from patients under forty and fifty years are given at pages 87 and 88, exhibiting in a remarkable manner this deformity.

In many patients advanced in life, who have sustained fracture of the neck of the femur, there is little, if any, chance of union. In these cases, the application of apparatus with the view of adapting and retaining the parts, is productive of great annoyance, and is apt to produce either ulceration or sloughing of the integuments at various parts; and confinement to one constrained position for a considerable time has a mischievous effect on the general health. Instead, the limb is placed in the easiest posture, either extended and slightly retained, or bent over a double inclined plane formed by pillows, with the knee of the affected side fixed to the opposite; a broad band is passed round the trochanters and pelvis, so as to restrain motion without causing inconvenience; and when pain about the thigh is troublesome, fomentation may be used. After some weeks, when the uneasy feelings have subsided, the position is changed, the patient is set up, and encouraged to move about, supporting the weight of the body upon crutches.

In more favourable subjects, whether the fracture is suspected to be without or within the joint, either entirely or partially, the broken surfaces are to be brought in contact, and retained immoveably in apposition for a time sufficient to admit of union. The limb is put up in apparatus not requiring removal, and but little readjustment. This can be effected only in the extended position. Many splints, with foot-boards, straps, and screws, are intended for this purpose, some to be attached to the injured limb, others to the sound one; but the apparatus which is most simple, and easily procured at all times and in all circumstances, is at once the best and the most efficient. This is a straight wooden board, not too thick to feel cumbrous, and not too thin to be pliable or easily broken; in breadth corresponding to the dimensions of the limb, in length sufficient to extend, from two, three, or four inches beyond the heel, to near the axilla, deeply notched at two places at its lower end, and perforated by two holes at the upper. The splint, well padded, is applied to the extended limb, the ankles being protected by proper adjustment of the pads. The apparatus is retained by bandaging. A common roller is applied round the limb, from the toes to near the knee, so as to prevent infiltration, which would otherwise follow pressure above by the rest of the apparatus. The splint is then attached to the limb by involving both in a roller from the foot to above the knee; and in doing this, the bandage, after having been turned round the ankle, should be passed through the notches, so as to be firmly attached to the end of the splint, thereby preventing the foot from shifting. A broad bandage is applied round the pelvis over the groin, and down the thigh, investing all that part of the limb left uncovered by the previous bandaging. A broad band, like a riding belt, is fastened round the pelvis, so as to bind the splint to the trunk, and thereby keep the broken surfaces of the bone in contact. A large handkerchief, or shawl, is brought under the perineum, and its ends secured through the openings at the top of the board. It is evident that, the splint being thus securely fixed and made as part of the limb, tightening of the perineal band will extend the member, and preserve it of its proper length. By care and attention in applying the apparatus, and in adjusting the cushions about the ankle and perineum, there is little or no risk of the skin giving way. The bandages will require to be reapplied once or twice during the cure, and the perineal band should be tightened frequently. The apparatus is retained for six or eight weeks, the time necessary for union varying according to circumstances. After its removal, great care must be taken at first in moving the limb and in putting weight upon it: it should be accustomed to its former functions very gradually.

The same apparatus in the most effectual for all fractures of the thigh; but those near the distal extremity, and in the lower third of the bone, may be managed tolerably well on the double inclined plane—M’Intyre’s splint, the thigh-piece of which is double, the one portion sliding on the other, and made to shorten and lengthen by means of a screw, without removal from the patient. To this the limb is secured by bandaging from the toes upwards; the upper bandage, which should be broad, being continued close to the perineum, and then passed several times round the loins. By elongating the thigh-piece by means of the screw, extension is kept up. Great complaint is commonly made by the patient of pain and stiffness in the knee for a long time after the treatment of broken thigh in the bent position.

There is no possibility of treating fracture of the thigh, with any satisfaction or credit, on the outside of the limb with the knee bent; however attentively the splints are placed, shortening, eversion of the foot, and deformity of the whole limb, are sure to follow. No greater absurdity and cruelty are conceivable than leaving the fracture unadjusted for weeks, making attempts to subdue consequent over-action, and then endeavouring to reduce and retain the bones at a period when otherwise they should have been firmly united. “Experience teacheth” not “fools,” and cannot amend those whom prejudice has blinded.

Compound fracture of the thigh, if circumstances do not forbid attempts to save the limb, is to be reduced and retained in the same way as the simple, the wound being attended to, and means taken to subdue inflammatory action. Abscesses must be opened timeously, the limb must be equably supported, and the powers of the system preserved.

The application of force may, in young persons, detach the epiphysis of the lower end of the femur, and displace it to a greater or less extent; and if the accident be not detected, the epiphysis will become consolidated with the shaft in this unnatural position, impairing the usefulness of the member, and probably laying the foundation for disease in or around the articulation. Reduction is easy, and the retentive treatment is the same as that recommended generally for fracture of the thigh near the knee-joint. I have met with one well-marked case of this form of diastasis. A girl sustained an injury of the knee when fourteen years of age, in consequence of the limb having been entangled amongst the spokes of a carriage-wheel in motion; the knee continued painful and swollen, and she had a halt in walking. After the lapse of about three years, extensive suppuration occurred in the lower part of the thigh and round the knee-joint, and amputation very soon became indispensable for the preservation of life. The synovial apparatus was much diseased, and the epiphysis of the lower end of the femur was found displaced forwards and upwards, so that only the posterior part rested on the tibia; in fact, it was turned, as here shown, almost half round on the shaft: firm union by bone had taken place.

Fracture of the Patella is generally simple. It is occasioned either by great force applied to the bone directly, or by the action of the strong extensor muscles—the knee being suddenly bent, and the bone snapped across over the end of the femur. The degree of immediate swelling, and of incited action, will vary according to the mode of infliction. When the injury is caused by a blow upon the part, the bone may be broken either transversely or vertically, or both; either the upper or the lower portion may be vertically split, usually the upper; sometimes there is considerable comminution. Muscular action produces transverse fracture only.

The nature and extent of the injury is readily ascertained. The patient is unable to extend the limb, and cannot support weight on it; in the bent position, a space is felt in the situation of the patella, the lower portion is found nearly in its place, but the other is drawn upwards on the fore part of the thigh; by extension of the limb and flexure of the thigh the portions are approximated, and crepitus is perceived when they are brought in contact. These symptoms are perceptible through any quantity of bloody effusion. By attentive manipulation, comminution and vertical splitting may also be detected. The circumstances attending the accident will, in most instances, lead to a tolerably accurate expectation of the state of parts.

The ligament of the patella does not often give way from muscular action; it is much stronger than the bone, and the latter consequently snaps. It may be, and has been, divided, along with the superimposed integument, by a fall on a sharp substance. This accident is followed by lameness, the ligamentous tissue does not soon unite, and the limb is long in regaining its usefulness; sometimes the union is imperfect, and the member remains weak.

Division of the integuments over a fractured patella is a very serious accident. The joint is opened, and such a state both of the limb and of the constitution must in general sooner or later occur as to cause necessity for amputation. Cases have, however, occurred, in which compound fracture of the patella has been cured.

The bone unites, under favourable circumstances, in the same way as any other. In longitudinal fracture there is almost always bony union. In transverse, the obstacles to correct apposition are great; the upper portion is acted on by the muscles on the fore part of the thigh, to a greater or less degree, in almost any position; there is increase and vitiation of the synovial secretion, and when the bones are approximated, this fluid is interposed. The union is therefore almost uniformly ligamentous, and, fortunately, this is as strong and as rapidly effected as that by bone. When the treatment is not of the most approved kind, a long portion of ligament is produced, and the limb remains weak. But union by a short ligament is undoubtedly the most desirable result, the member is as useful as when bone is the uniting medium, and ligament is less subject to disruption; bony union is, for a long time, apt to give way on the application of even slight force.

The fragments are to be approximated, and brought nearly into contact, by placing the limb, with the knee extended, and the thigh slightly bent on the pelvis. The limb is retained in this position by the application of a straight splint behind, hollowed at the extremities, extending from a little below the tuberosity of the ischium to below the middle of the leg, and retained by a roller, not at all tight; the foot and lower part of the limb must be previously bandaged to prevent infiltration. All apparatus with straps, buckles, and apertures to receive the portions of the bone, are worse than useless. The splint requires to be worn for some time after the patient gets into the erect position, which ought not to be before six weeks after the accident.

Fracture may occur at any part of the leg. One or both bones may give way, either transversely or obliquely, according to the application of the force. The transverse fracture is produced by a direct blow, by a heavy body striking or falling on the limb, or by the lower part of the limb being fixed whilst the body is in rapid motion; the oblique is caused by force applied in the direction of the bones—as when a person falls or leaps from a height, and alights on one foot, the limb being extended and the body erect. In the latter description of accident, it is frequently supposed, erroneously, that but one bone has given way; fracture of the tibia perhaps is perceived some few inches from the distal end, whilst the fibula at that part is entire; but, by attentive manipulation, it will often be found that the fibula has sustained fracture, within a short space of its upper extremity; the force was applied to the ends of the bones, and they gave way, each at the weakest part.

The tibia is broken at its upper part near the tuberosity, with or without similar injury of the fibula. There is considerable displacement, particularly in the bent position of the knee; there is no restraint to the action of the extensor muscles inserted immediately above the point of fracture, and these, though not acting with unusual power, cause protrusion of the upper end of the tibia, the condyles of the femur serving as a fulcrum over which the muscles are stretched. This injury is usually the result of direct violence.

Fracture of one bone, at a point lower in the limb, is not attended with much displacement or deformity. Indeed, attentive manipulation is often required to detect the site of the injury; and a sense of crepitation is perceived, only when the lower and upper portions of the bone are pressed on alternately or during rotation of the foot. When both bones are broken, the displacement and swelling are great. The foot is sometimes turned inwards, but usually it falls outwards; and if there has been much laceration of the soft parts, with or without division of the integuments, the lower portion of the limb hangs quite loose.

By the application of great force, as by a rope being twisted round and run tight on the limb, both bones and soft parts may be reduced almost to a pulp, without much or any division of the integument. Such an accident is followed by rapid and great swelling, violent incited action, gangrene, and severe constitutional disturbance. The progress of the mortification is not in all cases uniform; in some, the swelling and discoloration extend to the groin and trunk in two or three days, attended with furious delirium; in others, the disorganisation of the limb is very slow, some days elapsing before it reaches the knee, and in these the constitutional symptoms are less severe.

In some cases there is extensive wound of the integuments, without serious injury of the bone, muscles, or vessels. The skin either has been divided by the external force acting upon the resisting bone, or the sharp fractured end of the bone has been thrust through. Sometimes the bone is protruded to a considerable extent, and entangled amongst the more superficial soft parts.

Fractures of the lower portions of the bones are generally the consequence of twisting and partial displacement of the ankle. The fibula is most frequently broken by twisting of the foot outwards, and the fracture is almost uniformly between two and three inches above the articulation. The broken ends are displaced inwards upon the tibia. The injury is detected by moving the foot, and tracing the line of bone; after swelling has taken place, examination, though almost equally easy, is productive of much more pain, and it is of importance to ascertain the nature of the injury at once, and immediately after the accident. The outer malleolus sometimes gives way from the same cause; or it may be snapped off by a direct blow. The lower portion of the tibia is sometimes longitudinally split by bending inwards of the foot, the patient having fallen from a considerable height; occasionally the inner malleolus is broken transversely. Inquiry as to how the accident happened, particularly as to the direction of the twist, the displacement of the foot, and the degree and extent of crepitation, will determine the nature of the injury.

The astragalus, os calcis, the other bones of the tarsus, and those of the metatarsus, are sometimes broken by the application of great force, but they are not much displaced. Sometimes the foot is violently concussed in consequence of a fall from a height, and though no fracture may have occurred, the patient is equally lame and pained; severe inflammation is sure to supervene rapidly, and may terminate untowardly.

Fracture of the upper part of the tibia is to be treated in the straight position, for it has been already observed, that when the knee is bent the upper portion necessarily projects. A hollowed splint of wood, extending from the middle of the thigh to near the heel, is applied behind, whilst one of pasteboard may be placed on each side: all are secured by bandaging, the foot and lower part of the limb being rolled previously to prevent infiltration; by this simple apparatus, motion of the knee-joint, and of the ends of the bones on each other, is completely prevented; the heel is raised, if necessary, for complete adaptation.

Fractures of the middle and lower portions of the bones are treated most advantageously, whether simple or compound, in the bent position, the angle being made more or less obtuse, according to the degree of flexion most conducive to easy reduction and retention. Extension is made on the limb, and the parts brought into as natural and handsome a shape as possible; in doing so, the appearance of the sound member should be kept in view. There is seldom any difficulty in accomplishing reduction; the extending and counter-extending power need be but slight; the upper part of the limb is steadied by an assistant, whilst the lower is stretched and moulded by the hands of the surgeon. In compound fractures at this part, the portions of bone completely detached from the hard and soft parts are to be extracted. And if reduction cannot be effected in consequence of a sharp and long end of the bone projecting through a narrow wound, either the portion must be abridged by the saw or cutting pliers, or the wound must be enlarged. Sometimes the one mode is preferable—sometimes the other—occasionally both are required. When the protruding portion composes but a small portion of the shaft, though perhaps of considerable length, it should be taken away; when, on the contrary, it is more thick than long, it is better to enlarge the wound; but on this subject no general rules can be laid down. The splint is the same as that recommended when treating of fractured thigh, composed of a thigh and leg-piece, with a moveable foot-board—the double inclined plane, improved by the late Mr. M’Intyre of Newcastle and others. A very simple and efficient apparatus has been used in our hospital for some years back. It answers every purpose fully better than the others, and can be had of all the instrument makers for a third of the expense of those previously in use. The foot-board is fixed so as to make the leg-piece of the proper length, and the splint is secured at a convenient angle. It is padded by means of a cushion filled with oat chaff. The foot is rolled separately; the limb is then raised carefully, and laid down on the splint placed quickly beneath by an assistant; it is retained in a proper position by the hands of the assistant, whilst a roller is carried from the toes round the foot-board, and along the limb to the knee. A broad roller is then made to surround the thigh and splint, and having been turned several times round the loins, is secured to the upper part of the cushion. The limb is thus rendered independent of the motions of the trunk; it is made as of a piece with the splint. It should be raised considerably above the level of the trunk, whilst the patient is in bed, in order, by favouring the return of blood, to prevent swelling and inflammatory action. The wound, if any, is to be approximated. If discharge follow, part of the bandage may be undone from day to day, for the purpose either of employing fomentation or of applying suitable dressing, and still the limb is kept perfectly steady. Abscesses must be opened early—spiculæ removed—constitutional symptoms warded off, and, if they do occur, combated,—at one time inflammatory action must be kept down—at another and more advanced stage, the strength must be supported by all means. In simple fracture it is seldom necessary to undo the bandage, till the apparatus is loosened by subsidence of the swelling—and if the fracture be early reduced, and kept steady, that will be but slight. Then the bandages are undone and reapplied, and the position of the limb attended to. It is seldom necessary to interfere with the leg during readjustment, but should there be any deviation, even considerable, from the proper position, it is easily remedied at the end of the first, second, third, or even of the fourth week; but the sooner the better. The patient may be removed from bed, and may sit up during the greater part of the day, with the heel on a level with the pelvis, within the first week. His health, appetite, and spirits, are thus kept up, sore back is avoided, the tedium of confinement diminished, and the cure greatly accelerated. At the end of five, six, seven, or eight weeks, according to the age, and as the consolidation advances, the patient may be allowed to move about on crutches, some few days after removal of the apparatus, the foot and leg being still bandaged, and supported by light splints, or the bandages may be starched and applied moist, with portions of coarse brown paper interposed. A firm case is thus formed for the protection of the limb and retention of the bones. No weight should be put on the limb for several weeks after, otherwise a leg cured well and straightly may become bent, twisted, and deformed.

Fractures of the lower extremities of the bones, and of the malleoli, are reduced by placing the foot straight, and retaining it so by the application of a wooden splint; the parts are protected by a wedge-shaped pad, and the whole is retained by a common roller. The splint is made to project two inches or two inches and a half beyond the ankle, and to reach near to the knee-joint. It has two perforations in the upper end; to these a bandage is attached by its split end, and it is then carried down along the inside of the splint, and rolled round the foot and ankle; thus the apparatus is prevented from shifting upwards. The other extremity of the bandage, during its convolutions round the foot, is made to pass through notches in the farther end of the splint; the foot is thus turned to the side opposite to that in which it was placed by the accident, and ought to be retained so till consolidation has taken place. The splint is of course always placed on the side of the limb opposite to the fracture.

Disunited Fracture.—In some cases union takes place very slowly. On removing the splints, with the expectation of finding the bones firmly united, the ends can be moved very freely on each other without crepitation or much pain. This, as already stated, may be referrible to various causes,—necessary or accidental evacuations, natural or not—diversion of the nutritious fluids to some particular organ, as in pregnancy—the period of life—a diseased state of the bone of the periosteum or medullary web. By keeping the parts immoveable and firmly compressed for some time longer, consolidation may be brought about. But in spite of every care, the ends of the bones in some cases remain unconnected by any save a soft medium. This happens, however, very rarely under proper management. I have had but one case of it in my own practice, when the patient was from the first under my own inspection and care; and in that the occurrence of false joint was attributable solely to the absurd conduct of the patient. He was tripped up on the street by some individuals following their avocation as pickpockets, fell, and broke his forearm. The fracture was immediately reduced and splints applied—one of pasteboard on each side, with a wooden one exteriorly till the pasteboard hardened. He soon cut away the ends of the splints—within thirty-six hours after they had been put on—so as to allow motion of the fingers and hand, sufficient for indulgence in card-playing. The splints were still farther shortened, and wholly removed much too soon; shortly afterwards he fell from horseback. No union took place by bone. Unless in the case of previous disease of the bone, disunion is generally attributable to some carelessness or recklessness, either of the surgeon or of the patient.

If any osseous deposit has taken place, it is absorbed; the ends of the bone are diminished in size by interstitial absorption; ligamentous or fibro-cartilaginous tissue is formed round the wasted extremities; and the surrounding cellular tissue being thickened and condensed, a sort of synovial pouch is formed, in which the ends, by this time smooth and rounded off, move freely. The limb is shortened in some degree, and its actions are very much diminished in force, there being no sufficient support for the muscles. The bones of the leg and of the forearm are occasionally the seat of false joint, sometimes the femur, but most frequently the humerus.

By the tight application of a firm and broad belt of leather, the part is steadied, and the limb rendered more serviceable. Various measures have been proposed and practised with the view of promoting a salutary increase of action in the parts, by which osseous deposit in sufficient quantity to form a firm uniting medium might be procured. The ends of the bones have been exposed by incision, and removed either by the saw or by cutting pliers; they have then been placed together, retained by proper apparatus, and the case treated as one of compound fracture. The ends have been cut down upon, rubbed over with escharotics, as caustic potass, and afterwards treated as in the former method. Setons have been passed between the ends of the bones, and been retained till sufficient action has occurred; they have been then withdrawn, and the limb steadied by splints and bandaging.

To the last method I would, from some experience, give the preference. It is the least severe, both immediately and consecutively; it is the most readily accomplished, and the most likely to be followed by a successful result. The exact site of the ends of the bones must in the first place be ascertained; the position of the bloodvessels and nerves must be looked to, that they may be avoided; a bistoury is then passed through the skin and down into the substance interposed between the ends of the bones. A strong and sharp needle, fixed in a handle, and with its eye near the point, is passed, in the track of the knife, fairly betwixt the bones, and pushed through the soft parts on the opposite side of the limb. A cord is then passed through the eye, and by withdrawal of the needle the seton is properly lodged. The effects must be attentively watched, and when sufficient action is supposed to have been excited, perhaps at the end of the first week, the cord is withdrawn, and the limb placed immoveable in a proper position. If action is slow in supervening, the chord may be smeared with irritating substances, as the unguentum oxydi hydrargyri rubri, or the unguentum cantharidis, &c. In this manner I have treated false joint in several situations successfully, but I have also been sometimes foiled in effecting my purpose. The seton must not be long retained, the object being to excite action, not to perpetuate discharge, by the profusion of which the end will be effectually frustrated. Much will depend on the period at which the practice is adopted.63

Dislocations.—Some joints are so contrived—their composing bones are so notched into one another, and connected by such powerful apparatus—and they are crossed by tendons, and tied together by ligaments in such a manner,—that dislodgement can scarcely be effected but by the most violent means. Nothing short of immense force is sufficient, and the displacement is uniformly attended with fracture of portions of the bones, or of their processes. Other bones are loosely joined, permitting free and unrestrained motion in all or in many directions, and but little force, applied in particular directions, suffices to separate and luxate them. In every joint the processes are liable to be broken, and the attachments of the ligaments to be torn off; ligamentous tissue withstands a greater degree of sudden violence than the osseous. The synovial membrane, and the fibrous tissue exterior to it, are almost always torn in complete luxation; but the extent of laceration varies in different joints, according to the direction of luxation and the degree of displacement. The rent may be small, closely embracing the neck of the bone; or there may be an extensive gap on the side opposite to that on which the luxation has taken place. In an articulation surrounded by muscular substance, there is also laceration of this to a greater or less extent. In some individuals, dislocation is very apt to occur, perhaps from peculiar laxity of fibre; and if in any person luxation of a joint has once been produced, the accident is apt to occur again and again from but slight causes.

In general, the mobility of the luxated joint is much diminished; the limb is either shortened or lengthened; its contour is changed; the injury is attended with violent pain; the patient is sick and pale; the system receives a shock, from which it gradually recovers after some time. Then swelling, from effused blood, takes place; and this is followed, after some hours, by excited action of the vessels and farther effusion, giving rise to greater stiffness and pain on attempts at motion. If no means are taken to replace the bone, and painful feelings subside along with the swelling, the limb remains long useless, and is the seat of occasional lancinating pains, but at last motion and utility are to a certain extent restored by the formation of a new joint—the head of the bone, and the parts on which it rests, mutually accommodating themselves to each other, by degrees, and permitting a limited extent of motion. Post mortem examination, years after the occurrence of the injury, shows change in the form of the bones—the head is flattened, and in the bone on which it lies there is a corresponding depression, formed partly by the deposition of new matter, partly by absorption of the old; in dislocation on the dorsum of the ilium, for example, there is excavation by absorption opposite to the centre of the head of the femur, and round this new osseous matter is deposited so as to form the cavity into a cup resembling the acetabulum. New processes are formed for the attachment of the muscles, and the old are absorbed to a remarkable extent. There are also new ligaments; and a sort of capsule is formed by condensation of the surrounding cellular tissue. The new articulating surface becomes quite smooth internally, and is covered, if not by cartilage, by a smooth substance which answers the purpose tolerably well; the old is gradually filled up and obliterated, the prominences being absorbed, and the cavity occupied by new deposit. These changes do not take place so rapidly as is generally supposed; the cartilage and synovial surface are not much altered for months after the occurrence of luxation; and if replacement be effected, the functions of the parts are soon performed as before the injury.

In some articulations, on account of the formation of the opposed surfaces, attempts at reduction prove ineffectual after the lapse of two or three weeks; in others, of more simple construction, it may be accomplished after some months. The simple mode of reduction is to put the patient off his guard, so that the muscles may be in a state of relaxation, and then to move the limb artfully in the proper direction, without much force. Occasionally, the bone is pulled into its place by the action of the muscles, during the patient’s efforts to place the limb in a comfortable position. Considerable force, however, is sometimes required in even recent luxations of large joints, and means must also be taken to weaken the muscular power. The patient, if young and robust, may be bled to syncope, or placed in the warm bath till a sense of fainting supervenes; or an enema of tobacco infusion may be administered, and smoking of tobacco may have the same effect when the patient has not been addicted to the noxious habit; or antimonial solution may be given in nauseating doses. Several or all of these methods may be necessary in some cases, particularly if the dislocation be of long standing. When thus general exhaustion has been procured, counter extension and extension are to be had recourse to. The former consists in having the patient, and the bone next to the trunk, fixed immoveably by fitting lacques and belts; and the latter is made by one or more assistants, or, if need be, with the help of pulleys. During extension, advantage is in many cases gained by lateral force and by rotation of the limb, the bone being thereby moved from its position, and brought within the sphere of muscular action, by which it is drawn suddenly into its proper place. In some cases, there is no doubt but considerable laceration is occasioned by the efforts at reduction, and perhaps this is in some degree necessary to a successful issue—as when the capsule has been slightly lacerated by the accident, and in consequence interposes an obstacle to the head of the bone slipping into its socket. After reduction, inflammatory action in the articulation and its neighbourhood is to be expected, to a greater or less degree, particularly when much force has been employed, and means must be taken to avert this; local remedies are generally sufficient, along with perfect rest.

In luxation of the lower jaw, both articulating ends are most frequently dislodged. They can escape in but one direction, forwards into the temporal fossæ; when both are dislodged, the mouth is widely open, and fixedly so, the chin is drawn downwards and backwards. When one is displaced, the jaws are partially opened, the chin is twisted to a side, and immoveable. Great pain is experienced from the pressure of the condyles of the bone on the temporal muscles, from stretching of the fibres of the pterygoids, and from interruption to the functions, by pressure, of the contiguous bloodvessels and nerves. Mastication is impossible, the speech is altered, and indeed articulation may be said to be impracticable.

It is supposed by the vulgar that the accident is particularly apt to happen to infants and young persons. Nurses are in consequence careful, when a child yawns, to support the chin, and pronounce an accompanying blessing. The articulating cavity is then shallow, yet luxation must be rare in young subjects. In my own experience no instance of dislocated jaw has occurred but in adults; and then, either from over-opening of the jaws, or from powerful muscular action during depression of the inferior maxilla.

The nature of the injury is at once known; and the displacement is easily remedied. But I have met with instances where, through ineffectual attempts at reduction, the unnatural position has been allowed to continue for many hours, to the great distress of the individual. The object in view is to depress the ramus—one or both, as may be—and to raise the chin. This is effected by pressure with the thumbs on or in the situation of the molar teeth, whilst with the fingers the jaw is moved upwards and backwards. The thumbs need not be protected by a glove, as is generally recommended; on the bone resuming its place, they are easily slipped into the space betwixt the jaw and the cheek. There is no necessity for bandaging, as retentive apparatus; the patient is not likely to yawn for some time after.

Luxation of the clavicle, at either end, is produced by force applied to the point of the shoulder. It is seldom that the sternal extremity is separated from its connexions. When this accident does happen, it is easily recognised; the end of the bone is prominent and loose, and is distinctly felt riding over the top of the sternum. Replacement is effected by bringing back the shoulder; but the bone is with difficulty retained in the proper position, and is long in becoming fixed; a certain degree of deformity is ever after present.

Displacement of the scapular extremity is by no means rare, and occurs to a greater or less extent, according to the laceration of the ligaments. If those only are torn which connect the end of the bone to the acromion, there is mere rising of the end. But if—as is often the case when the violence has been great, as in a fall either from a height or with great velocity—the conoid and trapezoid ligaments connecting the tuberosity of the bone with the coracoid process, have given way, then the end of the bone projects, pushes out the deltoid, and gives rise to considerable flattening of the shoulder. The arm falls forwards, and cannot be moved but with pain; nor is the patient able to raise it by its own muscular power. If the surgeon grasps the middle of the bone, he finds the end moveable; and the evident and deforming projection puts an end to any doubt regarding the nature of the case. The bone is readily reduced by raising the arm, and carrying the scapula backwards. The limb must be retained in the proper position for many weeks, if a cure without interruption, and with as little deformity as possible, is desired; but after the utmost care and patience, there still remains, in almost every case, some projection more than before the accident. The ligaments are slow in uniting, and the union is imperfect and weak. The requisite apparatus is the same as for fractured clavicle, but must be retained for a longer time. The patient experiences great relief from the limb being put up in this manner and maintained so; and inflammatory action, with much of the swelling, is averted.

The inferior angle of the Scapula occasionally escapes from under the border of the latissimus dorsi, usually with some laceration of the muscular fibres. The displacement is occasioned by raising the arm above the head to an unusual extent. The angle of the bone projects considerably, and the muscle is felt playing beneath it distinctly during motion of the parts; the movements of the limb are limited and painful. The parts may be brought into their original position by pressing the angle of the scapula towards the ribs, whilst the arm is much raised; and the bone is afterwards confined in its proper place by a broad bandage passed pretty tightly round the chest. The retentive apparatus must be continued for a considerable time, and in some cases a cure may be so effected; but in general the bone soon regains its former unnatural position, and continues to do so, however often and however easily it may be replaced. The parts gradually become accustomed to the change in relative position, and little inconvenience is experienced.

Luxation of the Shoulder-joint is prevented, by the arrangement and structure of the parts, from taking place in any direction excepting towards the axilla—downwards into the hollow of the armpit, downwards and forwards under the lower border of the pectoral muscle. Occasionally, though very rarely indeed, displacement occurs backwards. On the anterior and inferior aspects, the articulation is not supported, as at its other sides, either by muscular substance or by processes of bone. The accident is occasioned sometimes, though rarely, by direct violence, as by a blow on the back part of the shoulder; and of such I have seen a few examples. But, in almost every instance, the displacement is caused by force applied to the distal extremity of the humerus; either immediately, as by falling on the elbow, or through the forearm, as when a person endeavours to break a fall by stretching out the arm, and alights with the whole weight of the body on the palm. The accident may also result from forcible abduction of the extremity, particularly when the power is applied near the extremity of the limb. There is laceration, to a greater or less extent, of the capsule, and of the muscles immediately investing the fibrous tissue round the articulating cavity. Without disruption, complete luxation cannot exist—the articulating surfaces cannot be separated, nor can the head of the humerus be altered in position; subluxation, or, in other words, a sprain, may occur in such circumstances, but true luxation cannot.

Bruises of the shoulder, with or without fracture, either of the scapula or of the upper part of the humerus, must not be mistaken for dislocation, for the consequences of such a blunder are fearful. In both descriptions of accident, the appearances of the limb are somewhat similar, and hence the examination requires to be particularly accurate and careful. In both there is flattening of the shoulder, but in fracture there is crepitus, motion to an unnatural extent, though painful, and greater suffering during manipulation; in dislocation no crepitus at all resembling that in fracture can be perceived, the motions of the limb are very limited, and the displaced head of the bone can almost always be felt. The direction of the force, too, as already observed, when on the subject of fracture, is an important assistant in diagnosis; from falls or blows upon the shoulder we may expect fracture, from falls on the elbow or palm, luxation. In dislocation an indistinct feeling, sometimes amounting to obscure crepitation, is occasionally perceived during rotation of the limb; and this arises from one or more of the tendinous attachments of the muscles having, during their disruption, torn away a portion of their osseous attachment.

Great pain attends on dislocated humerus, from the head of the bone compressing and stretching the axillary plexus; and the interruption to the flow of the blood produces tingling at the points of the fingers, numbness of the whole limb, and after a time swelling of the hand and forearm. Flattening of the shoulder, and depression under the acromion, are the most prominent marks of displacement having occurred, and are at once apparent. They are more distinctly perceived on comparing the two shoulders; then the acromion on the affected side stands remarkably outwards. The projection is not so apparent when the immediate swelling from effused blood has been fully formed, but the hollow under the acromion can be felt through any quantity of extravasated blood. The arm admits of very little motion, is lengthened and abducted. The elbow cannot be brought close to the side, and attempts to do so are productive of great suffering. The patient has little or no muscular command over the upper arm. Rotation and elevation of the limb require considerable force, and are practicable only to a very limited extent; during attempts at the former, as already mentioned, obscure crepitus is sometimes perceived. The abduction is most remarkable in the dislocation directly downwards; and in this form of the accident, the fingers easily detect the head of the bone lying in the axilla, deep, yet distinct, particularly during attempted rotation. When the head of the bone lies forward by the coracoid process, and under the pectoralis major, it can be felt, and the prominence occasioned by it can be clearly seen in thin people, before swelling has occurred, and after its subsidence. The bone sometimes lodges in an intermediate situation, and then the signs peculiar to each form of displacement are mixed. When reduction is not accomplished, the bloody swelling first occurs to obscure the signs; this may in part subside, but then the inflammatory supervenes; both after a time disappear, the muscles waste, and then all the signs are very apparent. After some weeks, the motions of the limb become more extensive, not in consequence of the head of the humerus having changed its position, or returned into the glenoid cavity, but from the scapula moving on the ribs more freely, and to a greater extent than usual. At last, but not till after a long period, considerable motion betwixt the bones can be effected; the scapula, where the head of the humerus rests, having furnished an adventitious cavity, to which the latter has adapted itself. But free motion can never be regained, for the movements that are effected are chiefly produced by the action of the muscles of the scapula.

Replacement, even in very recent cases, sometimes is accomplished with difficulty in those whose muscles are fully developed. But in general a successful result will follow simple measures, particularly if the patient is taken unawares—as by rotating the arm with one hand whilst the fingers of the other are placed in the axilla, then suddenly lifting the head of the bone outwards, and at the same time performing abduction—the patient being all along assured that he will not be put to pain, and that there is no intention of attempting reduction. In this manner reduction may often be accomplished by the surgeon and one assistant; the trunk and scapula being fixed by the assistant, either grasping the patient in his arms, or holding a sheet or towel passed round the body, close to the axilla, whilst the surgeon extends and rotates the extremity, and at the same time lifts the head of the bone from its situation. The rotation is made by using the forearm, bent to a right angle, as a lever; thus considerable power can be exerted on the head of the bone, and the long head of the biceps muscle—the stretching of which, no doubt, affords an obstacle to reduction—is at the same time relaxed. In luxation downwards, there is no more successful method than that by counter-extension with the heel in the axilla, and extension by the surgeon grasping the wrist. The patient is placed recumbent, on a couch or on the floor, and the surgeon, sitting by his side, lodges his heel in the axilla, and with both hands extends the arm; after a short continuance of extension, he performs a sudden and powerful combination of both movements, and so jerks the bone into its natural position. In some recent, and in all old cases, it is necessary to apply considerable force, steadily, and for a long time, so as to tire out the muscles, and dislodge the head of the bone. An assistant effects this by means of pulleys. These are fixed to a laque, applied above the elbow with a clove-hitch, and to a ring fastened either in the wall or to a post; two small iron rings which can be screwed into a beam are useful in private practice, and should always accompany the pulleys. When all is prepared, the assistant pulls the end of the rope steadily, and with considerable power, whilst the surgeon rotates the limb, and endeavours to lift the head of the bone, at the same time regulating the degree of extension. The directing of the degree and continuance of the force is not the least difficult part of the procedure, for, when excessive, there is a risk of the axillary nerves and artery giving way; such accidents have happened, and been accompanied with serious and even fatal consequences; and from laceration of other tissues, the muscular, fibrous, or cellular, fatal inflammation and abscess have resulted. The surgeon is therefore called upon to exercise judgment and discretion—not to continue extension to a pernicious extent, and not to abandon attempts at reduction too soon, leaving his patient disabled for life. For making counter-extension to the extension by pulleys, a broad strong belt is useful, perforated near the middle for transmission of the injured arm; it is passed round the body so as to fix the trunk and scapula, coming under the axilla of the sound side, and being then fastened by means of a hook to a ring in the wall.

Luxations of the shoulder-joint may be, and have been, reduced after the lapse of two or three months; but the difficulty increases, and the chance of success diminishes, in proportion to the time which has elapsed since the date of the accident. And in deciding upon making the attempt, many circumstances are to be weighed and considered—the patient’s period of life and his occupations, the state of the parts, the degree of motion that has been acquired, and the treatment, if any, which has been previously followed. Perhaps the most important consideration is regarding the state of the parts, as indicated by the degree of motion. If the movements be to such an extent as to favour the supposition of the head of the bone having been furnished with a new recipient cavity, to which it has in a great measure accommodated itself, and that the glenoid cavity has, from disuse, become altered, the surgeon can scarcely hope for advantage to his patient from attempts to break up the new articulating apparatus, and reëstablish the old. The patient will, most probably, be put to a great deal of pain and some danger, without experiencing improvement to the limb; indeed the motions and power may prove less than before. In old men, too, force sufficient for reduction cannot be employed without great risk of laceration of nerves, bloodvessels, and muscles. But if the patient be young, the motions still limited, and the articulation apparently not changed by solid effusion, reduction may be attempted with a fair prospect of success, and without injury. In all such cases, however, the surgeon must watch every step of the proceedings, and have sufficient experience to stop short of inflicting irreparable mischief. No standard can be fixed for the degree of force that is necessary and safe; he may be foiled, even after the most powerful efforts, in a dislocation of two or three weeks’ duration; whilst, by the use of but slight force, he may succeed in one of as many months. Much assistance is obtained by the means formerly adverted to, as auxiliary, by weakening the muscular energy. Of these, nauseating doses of antimony are most generally employed, and being the most safe, may be recommended to be tried first; and if these fail to produce the desired effect, the patient may be bled freely, if he be young and robust, more especially since this will assist to avert the inflammatory action likely to follow the violent reduction. Tobacco produces the most complete prostration of muscular power, and may consequently be resorted to in extreme cases; but it ought, if possible, to be avoided, as its use is far from being void of danger. The warm bath cannot always be procured; when at hand, it merits adoption, being both safe and effectual, particularly if combined with antimony or bleeding. The extension should not be commenced till these means have begun to take effect, but everything should be prepared, so that it may be applied at a moment’s warning. After all attempts at reduction, whether successful or not, it is necessary to moderate the inflammation that ensues, by local bleeding and fomentation, combined, if necessary, with nauseating laxatives: general depletion is seldom required.

Luxation of the Elbow-joint is an extremely common accident, particularly in young persons, before the bony processes have been fully formed. It is produced by wrenches, or by force applied to the farther end of the forearm, the bones neither breaking nor bending. Sometimes, though very rarely, it is caused by direct violence, as in a fall, and then may be combined with fracture of one or both bones of the forearm; but in other circumstances, fracture and luxation can scarcely coexist. In general, both bones of the forearm are displaced backwards, sometimes a little to the ulnar side. The coronoid process occupies the cavity for the reception of the olecranon, and the head of the radius lodges behind the external condyle; the extremity is shortened, and looks twisted; it is slightly flexed, and in the middle state between pronation and supination. Unnatural lateral motion can be produced, but flexion is impracticable, the limb cannot be brought quite into the extended state, and rotation is difficult and painful. Swelling soon takes place, and consequently the hollows are filled up, and the processes of the bones obscured. Yet the olecranon and inner condyle can always be recognised and felt, and their relative position ascertained; the form of the end of the humerus, its hollows, and its prominences, can be distinctly discerned, both before and after the swelling, the soft parts being stretched over the bone; and by rotating the limb with one hand, whilst the other is placed over the outer and back part of the joint, the situation of the head of the radius is detected. Thus the relations of the bones to one another are discovered; and this must be done at once, whatever pain may be produced by the examination, for it is a saving of suffering in the end. Yet the nature of this injury would seem difficult of detection—a fact scarcely intelligible by any one who is careful in his manipulations, and who possesses common observation, and a sound knowledge of anatomy. Many cases of unreduced luxation are met with; I have seen it in both elbows of the same person; and I have had a dozen of cases, in as many months, of unreduced elbows shown too late for attempts at reduction. The frequent occurrence of such blunders is the more lamentable, as it is almost impossible to replace the bones after three or four weeks; indeed, I have been foiled at the end of two weeks. The parts soon accommodate themselves to their new position, the olecranon process shortens, motion rapidly increases, and the bones get more and more secure in their new relations,—osseous matter being deposited laterally, forming cavities for their lodgement, and new ligamentous matter confining them thereto. After a time, flexion can be made to a right angle; and the limb becomes tolerably useful. By unsuccessful attempts to restore the natural position, inflammation is excited; and thus the salutary processes, commenced by nature for reparation of the displacement, are interrupted and delayed; in young persons such disease of the joint may be produced as might lead to loss of the extremity.

Luxation of the Radius alone, backwards on the outer condyle, is sometimes met with; but this bone is seldom singly displaced far from its original site. A hollow is felt below the end of the humerus, on the outer and fore part, and there is a corresponding prominence behind; the head of the bone is found unnaturally moveable on rotation, and this motion is difficult and painful; the arm is extended, presenting a twisted appearance, and flexion is very limited. Extension is to be made, along with pronation.

Sometimes the radius is displaced forwards. The coronoid process of the ulna is occasionally broken off; there is no deformity during flexion of the elbow, but when the limb is extended, the olecranon is drawn upwards.

In luxation of both bones, reduction is much facilitated by position of the arm. The arm and forearm are extended, and the limb is brought well behind the trunk, so as to relax the triceps; then the surgeon performs extension and counter-extension, pulling the forearm with one hand, whilst he pushes with the other placed on the scapula. If the force thus employed prove insufficient, as it seldom will in recent cases, the patient may be placed on his face, on a couch, and on the limb being brought into the favourable position already noticed, counter-extension may be made by the heel planted against the inferior costa of the scapula, whilst the wrist is pulled with both hands. It is seldom necessary to employ pulleys, excepting in cases of old standing; if so, the only peculiarity in their application to this joint is the direction of the force, backwards. And this I consider to be a very material part of the manipulations, for, by attention to it, I have succeeded after previous failures,—after great force had been applied, causing excoriation and swelling of almost the whole limb. In luxation of the radius, backwards, flexion and pronation, combined, if necessary, with extension, will generally effect replacement.

Dislocation at the Wrist is very unfrequent. The articulation is naturally strong, admitting of little motion, the bones being accurately fitted to each other, whilst the retaining ligamentous apparatus is both copious and unyielding; on this account greater force is required to effect displacement here than at either the elbow or shoulder-joints, and violence applied to the hands usually causes fracture of one or both bones of the forearm, not luxation of their extremities. Luxation, however, sometimes occurs, either from violent twisting, or from falling on the palm of the hand; and the displacement may be either of both bones or of one. In the latter case, it is almost uniformly the radius that suffers; in the former, the luxation is forwards.

Dislocation of the distal extremity of the radius is generally produced by a sudden wrench or twist. The bone is felt loose and prominent, sometimes riding over the upper part of the carpus. The position of the hand is towards pronation, supination cannot be performed, and, on attempting it, great pain is occasioned. Reduction is readily accomplished, by pulling the palm with one hand, whilst with the other the head of the bone is pressed backwards into its situation.

Displacement of both bones is more frequently the result of a fall on the palm, with the hand bent much backwards. In this case there are two projections, so distinct as at once to mark the true nature of the accident, one anteriorly, formed by the ends of the radius and ulna, the other posteriorly by the carpus; above the posterior prominence there is a considerable depression. Here also reduction is easy; it is sufficient to perform simple extension with one hand, whilst with the other the wrist is moulded into its proper form. The after treatment, however, requires attention, for extensive laceration of tendinous and ligamentous tissue, perhaps combined with fracture of the bony processes to a greater or less extent, must have taken place to admit of displacement; in consequence violent inflammation is to be expected, and means must be taken to avert it. On account of this laceration, also, mere reduction is not sufficient, retentive apparatus must be applied; as soon as the limb has been made straight, a pasteboard splint is to be applied on each side, as in fracture of the forearm, and retained with a roller, a wooden splint being placed exteriorly until the pasteboard hardens. This precautionary measure is also necessary to avert redisplacement in dislocation of the radius singly; in both accidents the apparatus should be retained for at least a fortnight. Afterwards, passive motion, gradually increased and combined with friction, is requisite to prevent stiffness of the joint.

In mere sprain of the wrist, large swelling soon forms anteriorly, from extravasated blood, resembling somewhat projection of the bones, and so leading towards fallacy in diagnosis; indeed it is not unreasonable to suppose that dislocation here does not occur so frequently as is imagined. Fracture also near or through the distal extremity of the radius, an accident formerly mentioned as exceedingly common from falls on the hand, is very apt to be mistaken for luxation. On this account, and because in every injury of the wrist the parts are soon obscured by bloody swelling, there is a strong necessity for early and accurate examination.

Subluxation not unfrequently occurs; in other words, the attachments of the bones of the forearm to each other are broken up, and their extremities separated to an unnatural distance. The accident is distinctly marked by the deformity, the absence of hard projection, and by the unusual space between the radius and ulna occupied by a soft and yielding swelling. Replacement is accomplished much in the same manner as in complete luxation, the bones being compressed towards each other with one hand, whilst extension is made with the other; afterwards splints must be applied and retained.

Compound luxations of the wrist are occasionally met with, and, like compound fractures in this situation, are always troublesome, and often terminate unfavourably. The soft parts are sparing, possessed of little vitality, and much injured by the accident; consequently reparation proceeds very slowly, and is generally superseded by unhealthy and profuse suppuration, perhaps accompanied with more or less sloughing of tendons and integument. If the ends of the bones protrude bare, shattered, and split, they should be removed by means of either the saw or the cutting pliers, previously to attempts at reduction; the wound should then be approximated, and the cure conducted on ordinary principles.

Sometimes a single bone of the Carpus is displaced, usually backwards. It is quite loose and moveable, and is easily replaced, but in almost every case redisplacement occurs, the bone at one time occupying its proper situation, at others forming an inconvenient and unseemly prominence on the back of the wrist, diminished by extension, and increased by flexion of the joint. The accident, however, is rare. I have never seen simple dislocation of any of the metacarpal bones.

Dislocation of the Fingers is produced by force applied to the extremities of the phalanges; the displacement is always backwards, excepting at the middle joint, where the bone of the middle phalanx is sometimes, but very rarely, luxated forwards. The remarkable projection on the back part of the finger marks the nature of the accident, even to the most careless observer. Reduction is accomplished by extension combined with flexion. In the case of the distal phalanges, it may sometimes be necessary to fasten a cord to the tip of the finger, in order to obtain sufficient extending power. After replacement, the application of temporary splints and bandage is prudent. Compound luxations, however carefully treated, almost uniformly come to amputation.

Luxation of the first joint of the thumb is rather an uncommon accident, and is not easily managed. The base of the first phalanx is displaced backwards upon the distal extremity of the metacarpal bone, causing a remarkable prominence on the dorsal aspect, and a corresponding depression on the palmar. The thumb is shortened, deformed, and almost immoveable; the swelling and pain are severe. This displacement is generally produced by the application of force to the point of the thumb, as in falling on it, or in coming against a resisting body with the thumb straight. The deformity is such as at once to apprise even the most inattentive or inexperienced of the true nature of the injury; but the treatment is very difficult and puzzling even in the hands of the best informed surgeons. The base of the bone seems to slip through the lateral ligaments, and remain firmly locked in their embrace; and these being very strong, and in a state of complete tension, defy all usual attempts at reduction. The end of a silk handkerchief, or thick soft cord, is to be attached to the distal extremity of the displaced phalanx, by means of the clove-hitch; and with this extension is made, either by the surgeon alone, or by one or more assistants,—frequently several are required. Counter-extension is made by the surgeon or assistant grasping the forearm, or another handkerchief may be passed betwixt the thumb and forefinger for an assistant to hold on by. The extending force should be made in a direction towards the palm, and almost uniformly requires to be great and long continued, even in recent cases. The bone may occasionally be jerked into its place by a sudden attempt at flexion of the joint, during steady pulling that has been continued for some time. But cases have occurred in which all attempts have proved ineffectual, and it has been found necessary to divide one of the lateral ligaments. From what has been already stated, the reason why this proceeding should facilitate reduction is sufficiently obvious. I had recourse to it in one instance,—one in which difficulty of reduction was not to have been expected. The accident was very recent, not an hour had elapsed; the patient was an old man, and very drunk; no resistance to the reductive measures could have been offered by muscular energy; yet very powerful force was applied and persevered in without avail. At last the external lateral ligament was divided by the point of a very narrow and fine bistoury, and then replacement was immediate and easy. Some inflammation followed, but was kept within bounds, and the man regained the use of the articulation. In other cases, again, the bone is replaced by the use of but very slight force, provided it be applied, as already stated, in a direction towards the palm of the hand. The last phalanx is equally liable to luxation in the thumb as in the fingers, and has no peculiarity of treatment.

Luxation of the Hip-joint.—The great strength of the ligaments, the depth and fitness of the body and cartilaginous cavity for the reception of the head of the bone, and the great power of the muscles surrounding the articulation, render dislocation here both difficult and rare. The accident is generally produced by great and sudden force, applied either to the distal end of the femur, or to the farther extremity of the limb, as by falling from a considerable height, by the foot slipping whilst the person is supporting a heavy weight, by falls from or with a horse, &c. The luxation, in a great majority of cases, takes place upwards and backwards, the head of the bone lying on the dorsum of the ilium. The limb is shortened to the extent of from an inch and a half to two inches and a half, the toes are turned in, the thigh is slightly bent upon the pelvis, and very firmly fixed. Before swelling has occurred, and also after it has subsided, the head of the bone can be felt lying under the gluteus. The trochanter is evidently out of place, being depressed, and lying farther up and back than usual. This is strikingly observable on comparing the injured limb with the opposite. Attempts to move the limb and effect rotation produce great pain. Large swelling soon follows, along with greater stiffness and immobility. If the head of the bone is not replaced, the pain gradually subsides, and, after some months, freedom of motion is regained to a slight extent; the patient is able to walk, but with a great halt.

At first, reduction is accomplished with no great difficulty. Within a very short time after the occurrence of the injury, before the patient had recovered from the shock, whilst he still lay sick, faint, and powerless, I have succeeded in effecting reduction of the femur quite unassisted,—extending with one hand, grasping the thigh behind, and, at the same time, rotating it outwards by pressure of the forearm on the leg, counter-extension being made by the left hand on the symphysis pubis. When a few hours have intervened, assistance and apparatus are requisite. The patient is secured by a broad band,—a common sheet suits very well,—passed under the perineum. The lacque is fixed above the knee, with a knot that will not run, a towel wrung out of cold water being applied next to the skin, in order to increase the security of the hold and prevent excoriation. A well-padded broad iron ring, tightened on the limb by a screw, and provided with suitable straps for attachment of the pulleys, is very useful,—fully more convenient than the common woollen lacque. Extension may be made by one or more assistants; but this may prove ineffectual, and it is better at once to have recourse to the pulleys: these are not alarming to the patient, and, being efficient, will in the end materially diminish his suffering. The extension should be gradual, steady, and persevering; the rotation of the limb during extension should be principally outwards, effected by laying hold of the ankle, and using the leg as a lever. This motion is peculiarly successful when the bone has yielded a little to the extension, when it has changed its place, and come nearly on a line with the cotyloid cavity. In some cases, even of no long standing, auxiliary means are required,—bleeding, antimony, &c., as formerly noticed. In old cases, no attempts at reduction should be made until the patient has been brought into a relaxed state, approaching to collapse, by one or more of the auxiliary means, and by such as are best suited to the particular circumstances of the case; in such instances also the extension, rotation, &c., must be persevered in for some time,—they are not at once successful. Frequently, particularly in recent cases, reduction is accompanied and indicated by an audible and perceptible snap, occasioned by the head of the bone slipping into the cotyloid cavity; the motions are again readily performed, and the limb resumes its proper length and shape. The muscular and articulating apparatus must be kept quiet for some time afterwards; a band should be passed round the knees, and the patient strictly confined to the recumbent posture; at the same time, fomentations are to be used about the joint, to the perineum, and to the part where the lacque was applied. It is rarely necessary to have recourse to abstraction of blood from the neighbourhood of the articulation.

There is no great risk of the bone again escaping from its situation. I have but once witnessed such an accident. A female suffered luxation of the hip nearly a month previously to her admission into the Royal Infirmary, and reduction was unavoidably deferred for three days more. It was accomplished without difficulty, and the usual precautions were afterwards adopted; but next day it was discovered that luxation had again taken place. The patient had cunningly contrived to have ardent spirits brought to her, and indulged freely in these, got out of bed, and slipped down. Replacement was again effected, more easily than before; the limbs were firmly secured to each other, confinement to bed and no farther indulgence in liquor were strictly enjoined, and after thirteen or fourteen days the limb fully regained its functions.

Luxation of the hip downwards and forwards, the head of the femur lying in the thyroid foramen, is generally produced by a fall under a heavy load, the thigh being at the same time forcibly abducted. I have also seen it occasioned by a fall with a restive horse. The limb is elongated considerably, and advanced a little forwards; the trochanter major is depressed, the toes are inclined neither outwards nor inwards; the limb is immoveably fixed, and this most unequivocally marks the nature of the accident.

The limb is lengthened when the trochanter major is split off, as also when severe bruise of the glutei has been inflicted without breach of continuity in any part of the bone, and without displacement. In the first stage of morbus coxarius, too, a somewhat similar appearance and position of the limb is presented; there is lengthening, but then there is also more or less wasting of the muscles, more mobility than in the dislocation, and a marked history attached. Complicated cases occasionally occur—as when a patient who has been labouring under hip-joint disease, perhaps not in an aggravated form, falls heavily, and on being lifted up is found to be incapable of moving the joint, the limb at the same time being elongated, and having a distorted appearance. An instance of this nature impressed strongly upon me the great necessity for accurate diagnosis in the first instance, and that such was to be acquired only by taking every circumstance into consideration. A young man was engaged in cleaning a slaughter-house, standing on two blocks of wood with his legs considerably apart. One of the blocks suddenly slipped from under him, and he fell with his limbs spread. He was carried home in great pain, and next day I was asked to visit him. The limb was elongated, and the hip flattened; the joint was stiff, and attempts at motion produced great pain; but by perseverance the limb could be put in various positions, and the trochanter was not so much depressed as in luxation downwards. By cross-examination it was discovered that the patient had halted in walking for many weeks previously, had felt as if the limb was longer than the other, had pain in the groin and knee; in fact, morbus coxarius had been advancing, and the pain, immobility, and greater elongation had been occasioned by the fall, causing violent excitement of the morbid action previously in progress. Dreadful consequences must have resulted from mistake in diagnosis and practice founded upon it. I have observed, in other cases, great and rapid elongation of the limb in consequence of injury to the hip-joint previously diseased; and I have known instances in which persevering and forcible efforts were made to reduce the supposed luxation.