The Project Gutenberg eBook of Elements of Surgery
Title: Elements of Surgery
Author: Robert Liston
Editor: Samuel D. Gross
Release date: December 8, 2015 [eBook #50640]
Most recently updated: October 22, 2024
Language: English
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ELEMENTS OF SURGERY:
BY
ROBERT LISTON,
SURGEON TO THE NORTH-LONDON HOSPITAL, PROFESSOR Of CLINICAL SURGERY,
ETC., ETC., ETC.
FROM THE SECOND LONDON EDITION,
WITH
COPIOUS NOTES AND ADDITIONS,
BY
SAMUEL D. GROSS, M.D.,
PROFESSOR OF SURGERY IN THE LOUISVILLE MEDICAL INSTITUTE, SURGEON
TO THE LOUISVILLE MARINE HOSPITAL, ETC., ETC.
Illustrated
WITH NUMEROUS ENGRAVINGS.
Philadelphia:
ED. BARRINGTON & GEO. D. HASWELL.
NEW YORK—J. & H.G. LANGLEY: CHARLESTON, S. C.—WM. H. BERRETT:
RICHMOND, VA.—SMITH, DRINKER & MORRIS:
LOUISVILLE, KY.—JAMES MAXWELL, JR.
1842.
[Entered, according to Act of Congress, in the year 1842, by BARRINGTON & HASWELL, in the Clerk’s office of the District Court for the Eastern District of Pennsylvania.]
TO
WILLARD PARKER, M. D.,
Professor of Surgery in the College of Physicians and Surgeons
in the City of New York,
THIS EDITION OF MR. LISTON’S WORK
Is Inscribed,
AS A TESTIMONIAL OF RESPECT
FOR HIS UNTIRING ZEAL IN SURGICAL PURSUITS,
AND OF ESTEEM FOR HIS PRIVATE VIRTUES,
BY HIS FRIEND AND FORMER COLLEAGUE,
THE EDITOR.
PREFACE
TO THE AMERICAN EDITION.
The character of Mr. Liston’s work is too well established to render it necessary for me to say anything in commendation of it. As an outline of surgical science, which is all that can be claimed for it, it is unrivalled in the English language. Written in a bold and graphic style, the distinguished author never hesitates to express his opinion, frankly and fearlessly, of what his judgment and experience have led him to disapprove. In this, as well as in some other particulars, he reminds one forcibly of that great and eccentric surgeon, John Bell. There is no cringing to this man or that, no doubtful or equivocal sentiment, no attempt to theorise or speculate; on the contrary, he comes right out, and clearly tells us what he means. His work, full of vigour and freshness, contains more originality than any other similar publication that has been issued for a long time from the British press. The hand of a master is discernible in every page; and, notwithstanding an occasional incongruity, or outré expression, it is impossible to read it without feeling that it is the production of a great mind, thoroughly acquainted with the subject on which he treats.
Such a work is invaluable to the student; for, independently of imparting sound surgical knowledge, it does more to form his judgment, and to qualify him for the practical duties of his profession than all the compilations in Christendom. Velpeau, with all his learning and all his patience, has never furnished anything equal to it. His "Medicine Operatoire" is nothing but a vast storehouse of research, to which pompous doctors may resort for ancient lore, and prosing teachers for materials for instruction. It details with endless minuteness the operative methods of every surgeon, great or little, from the age of Hippocrates to the present period, with their various modifications and improvements, not forgetting the "appreciations" and labours of the able professor himself. Such productions are well enough in their way; they serve to give us an idea of the rise and progress of surgery, and form good books of reference. Beyond this, however, they are of comparatively little utility; the great mass of the profession is no more benefited by them than if they had never been written; few read them, and still fewer understand them. This attempt at erudition pervades, if I mistake not, almost every recent publication on surgery in the French language. Dupuytren is alone free from it. His writings breathe throughout a different and more independent spirit: he speaks like one accustomed to act and to think for himself; and the result is, that he has accomplished more for French surgery than any other Frenchman since the days of Ambrose Paré.
The first edition of the present Treatise was published at Edinburgh in 1831, some time prior to the author’s removal to London. It was originally comprised in three volumes. A second impression, of which this is a reprint, appeared at London in 1840, in a revised and improved form. The favourable reception which the publication has met with in this country, and the desire I have felt to introduce it into the school with which I am connected, as a text-book, have induced me to prepare it for the American press with particular care. Among the additions, properly so called, is an article on Strabismus, and another on Club-foot; two subjects, the former of which was entirely omitted in the English edition, and the latter discussed in a manner altogether incommensurate with the existing state of our knowledge in regard to it. The notes are designed to serve as further illustrations of the text, or to supply deficiencies in relation to certain topics which have been passed lightly over by the author. They might have been extended to almost any number, and it would have afforded me no ordinary gratification, had it been consistent with the views and interests of my publishers, to present what might be considered as a tolerably fair outline of American surgery. For such an object ample materials are extant, highly valuable in themselves, and eminently calculated, when they shall be properly embodied, to reflect credit upon the talents, enterprise, and dexterity of our surgeons.
It need hardly be added, what is self-evident, that the editor of a work is responsible to the public only so far as his own labours are concerned. He adopts only in a general manner, without endorsing all, the views and opinions of his author.
S. D. GROSS.Loui
LouiLouisville Medical Institute,
LouisvilleMay, 1842.
PREFACE.
The rapid advancement made in the pathology and treatment of surgical diseases demands a perpetual revision and correction of the systematic works devoted to this department of the healing art.
Accordingly, text books, various in merit and extent, have emanated from the different schools. Several of these have, by successive editions, kept pace with the science; whilst others have fallen into disuse.
In this part of Britain, the systems of Latta, B. Bell, and Allan, occupied the field; but it being now vacant, I venture to supply the deficiency, by reducing the heads of my lectures into a compendium, or guide, for those students who resort to this city.
It must appear superfluous to preface such a work by anatomical descriptions, anatomy being now studied more generally, and with greater zeal, than heretofore. Pathology also is more attended to, and better understood. To which circumstances are to be ascribed the improvements in surgical science, as well as in the art of operating.
The functions and structure of parts are more frequently preserved uninjured—mutilation is more rarely required—and operations are dispensed with. The wider the extension of pathology, the fewer the operations will be—thus affording the best criterion of professional attainment. Who will question, that there is more merit in saving one limb by superior skill, than in lopping off a thousand with the utmost dexterity?
To treat surgical diseases as they ought to be treated, the practitioner must be thoroughly acquainted with the healthy and morbid structure; he must also have a mind vigorous and firm from nature, well instructed in the best precedents, and matured by observation.
Years are not the measure of experience. It does not follow, that the older the surgeon is, the more experienced and trustworthy he must be. The greatest number of well-assorted facts on a particular subject constitutes experience, whether these facts have been culled in five years or in fifty.
It is only from experience, directed and aided by previous study, that accuracy of diagnosis and celerity of decision can be acquired. Besides knowing in what manner to proceed, the surgeon must know well wherefore he acts, and also the precise time at which he should interfere. With knowledge and confidence derived from experience, he will perform such operations as are indispensable for the removal of pain and deformity, or for the preservation of life, with calmness and facility—with safety to his patient, and satisfaction to those who assist in, or witness, his proceedings.
Attention to the apparatus is necessary. It should be in good order, simple, and ample. The young surgeon should note down, previously to an operation, whatever, on reflection, can possibly be required. "For in most capital operations, unforeseen circumstances will sometimes occur, and must be attended to; and he who, without giving unnecessary pain from delay, finishes what he has to do in the most perfect manner, and that most likely to conduce to his patient’s safety, is the best operator."
It is seldom necessary to employ much preliminary treatment. From the usual preparative course of bleeding, purging, cooling diet, etc., patients about to undergo capital operations, as lithotomy, suffer more than they can gain.
It is of the utmost importance to attend to the state of the patient’s mind and feelings. He ought not to be kept in suspense, but encouraged and assured; and his apprehensions must be allayed. If this cannot be effected—if he is dejected and despondent—talks of the great risk, and of the certainty of his dying, it is better that the operation be abandoned, or at least delayed. If, on the contrary, he is confident in the resources of his constitution, and in the ability of his attendant, and looks forward to the advantage to be derived from his own fortitude, then should there be no delay.
A mild laxative may be given, when an empty state of the bowels is desirable, or when they, by acting too soon afterwards, might put the patient to inconvenience or pain, or interrupt the curative process.
Attention to after-treatment is of much greater importance. The practitioner is not to rely on success, however well the manual part has proceeded. He must consider his labour only begun, when the operation has finished; the patient is yet to be conducted, by kindness and judgment, through the process of cure.
It is thus only that difficult and unpromising cases can be brought to a happy conclusion, and favour and lasting reputation gained.
In the present work an endeavour has been made, in the first place, to lay down, correctly and concisely, the general principles which ought to guide the practitioner in the management of constitutional disturbance, however occasioned.
The observations introduced to illustrate the doctrines inculcated are given as briefly as is consistent with an accurate detail of symptoms and results. The descriptions of particular diseases have been sketched and finished from nature; and, it is hoped, with such fidelity, that their resemblance will be readily recognised.
To describe all the methods recommended and followed, in the different surgical operations, would occupy more space than can be allotted in an elementary work—would, without answering any good purpose, lead into the wide range of the history and progress of surgery.
Such modes of operating are described as have been repeatedly and successfully performed by the Author.
If by clear and simple description of the phenomena attendant on morbid action, and of the changes which it produces,—if by plain rules for the treatment of the diseases, and performing the operations for their alleviation or cure,—he contribute to the progress of surgery, and the consequent diminution of human misery, he will consider himself fully rewarded for the time and the labour spent on this production.
CONTENTS.
| PART FIRST | |
| Page | |
| Inflammation | 13 |
| INFLSigns | 14 |
| Irritation | 20 |
| Termination of Inflammation | 25 |
| Termination of Adhesion | 25 |
| Termination of Suppuration | 29 |
| Termination of Mortification | 43 |
| Erysipelas | 55 |
| Furunculus and Anthrax | 62 |
| Inflammation of Mucous Membranes | 65 |
| Inflammation of Serous Membranes | 66 |
| Inflammation of Joints | 67 |
Hypertrophy and Atrophy of the Articular Cartilages, with Eburnation | 75 |
| Scrofulous Disease of Joints | 77 |
| Neuralgic Affections of Joints | 78 |
Growths from the Synovial Membrane and Loose Substances in Joints | 79 |
| Affections of Bursæ | 80 |
| Coxalgia | 81 |
| Alterations of Form in the Head of the Femur | 86 |
| Inflammation and Diseases of Bone | 94 |
| INFLSuppuration in Bone | 96 |
| INFLCaries | 96 |
| INFLNecrosis | 103 |
| Fragilitas Ossium | 110 |
| Mollities Ossium, Rachitis, &c. | 110 |
| Arterial System, Affections | 116 |
| Aneurism | 118 |
| Aneurismby Anastomosis | 127 |
| Inflammation of Veins | 130 |
| Tumours | 134 |
| TumoursAdipose | 137 |
| TumoursFibrous | 138 |
| TumoursEncephaloid | 139 |
| TumoursMelanoid | 142 |
| TumoursCarcinomatous | 142 |
| Fungus Hæmatodes | 147 |
| Painful Tubercle | 149 |
| Polypus | 150 |
| Encysted Tumours | 151 |
| Tumours of Bones | 153 |
| Osteosarcoma | 154 |
| Spina Ventosa | 157 |
| Aneurismal | 158 |
| Osseous | 158 |
| Hydatic | 161 |
| Wounds | 164 |
| Tetanus | 183 |
| Ulcers | 186 |
| Hospital Gangrene | 191 |
| Sloughing Phagædena | 191 |
| Malignant Pustule | 193 |
| Ulcers on the Genital Organs, with their Consequences | 195 |
| Scalds and Burns | 211 |
PART SECOND. |
|
| Injuries of the Head | 215 |
| InjuWounds of the Scalp | 215 |
| InjuWounds of the Temporal Artery | 216 |
| InjuConcussion | 218 |
| InjuCompression | 226 |
| InjuFractures of the Cranial Bones | 227 |
| InjuWounds of the Brain | 232 |
| InjuHernia Cerebri | 233 |
| InjuPerforation of the Cranium | 234 |
| InjuInflammation of the Scalp | 238 |
| InjuThickening of the Scalp | 239 |
| InjuTumours of the Scalp | 243 |
| Diseases of the Eye and its Appendages | 245 |
| InjuInflammation and Abscess of the Lachrymal Passages | 245 |
| InjuInflammation of the Lachrymal Sac | 246 |
| InjuFistula Lachrymalis | 248 |
| InjuEncanthis | 252 |
| InjuEncysted Tumours of the Eyelids | 253 |
| InjuClosure of the Eyelids | 253 |
| InjuEctropion | 254 |
| InjuEntropion | 255 |
| InjuTrichiasis | 255 |
| InjuPterygium | 256 |
| Diseases of the Eyeball | 257 |
| InjuOphthalmia | 257 |
| InjuPurulent Ophthalmia | 260 |
| InjuStaphyloma | 261 |
| InjuInflammation of the Cornea | 261 |
| InjuPustular Ophthalmia | 263 |
| InjuUlcers of the Cornea | 263 |
| InjuLeucoma | 264 |
| InjuHernia of the Iris | 264 |
| InjuAlbugo | 264 |
| InjuNebula | 264 |
| InjuOphthalmia Tarsi | 265 |
| InjuStaphyloma | 266 |
| InjuHydrophthalmia | 266 |
| InjuExophthalmia | 266 |
| InjuInternal Ophthalmia | 272 |
| InjuIritis | 272 |
| InjuHypopium | 273 |
| InjuChoroiditis | 274 |
| InjuAmaurosis | 275 |
| InjuGlaucoma | 277 |
| InjuCataract | 277 |
| InjuArtificial Pupil | 287 |
| Wounds of the Eyeball | 288 |
| Orbital Inflammation | 290 |
| Tumours in the Orbit | 290 |
| Strabismus | 292 |
| Nasal Polypi | 301 |
| InjuMalignant Polypi | 303 |
| Nose, and Nasal Cavities, Inflammation, &c. | 308 |
| InjuNoli me tangere | 310 |
| InjuOzœna | 310 |
| Rhinoplastic Operations | 312 |
| Inflammation of the Antrum Maxillare | 317 |
| Lips, Ulcers | 319 |
| InjuCongenital Deficiencies | 322 |
| Palate, Congenital Deficiencies | 322 |
| Soft Palate, Tonsils, &c., Inflammation, &c. | 326 |
| Tongue, Ulcers | 331 |
| InjuInflammation | 332 |
| InjuDivision of Frænum | 334 |
| Salivary Ducts, Diseases | 335 |
| InjuRanula | 335 |
| InjuGums, Diseases | 337 |
| InjuTeeth, Diseases | 338 |
| Injury Extraction of | 340 |
| InjuLower Jaw, Diseases | 341 |
| InjuDisarticulation | 345 |
| Wounds of the Face and Neck | 347 |
| Larynx and Trachea, Diseases | 354 |
| InjuForeign bodies | 363 |
| InjuTracheotomy | 364 |
| Pharynx, Diseases | 368 |
| InjuForeign bodies | 371 |
| Œsophagotomy | 372 |
| Ear, Diseases of | 373 |
| InjuForeign bodies | 375 |
| InjuPolypus | 375 |
| Deafness | 375 |
| Bronchocele | 377 |
| Glandular Tumours in the Neck | 379 |
| Hydrocele of the Neck | 381 |
| Distortion of the Neck | 382 |
| Venesection in the Jugular Vein | 384 |
| Ligature of the Carotid Artery | 385 |
| InjuArteria Innominata | 387 |
| InjuSubclavian Artery | 387 |
| InjuAxillary Artery | 392 |
| InjuBrachial Artery | 392 |
| InjuHumeral Artery | 394 |
| Wounds of the Palmar Arches | 395 |
| Paronychia or Whitlow | 396 |
| Onychia | 399 |
| Collections in Thecæ | 401 |
| Ganglia | 401 |
| Venesection, bend of the arm | 403 |
| Mamma, Diseases | 405 |
| InjuEncysted Tumours | 406 |
| Affections of the Chest | 409 |
| InjuHydrothorax | 410 |
| InjuEmpyema | 410 |
| InjuWounds | 411 |
| Affections of the Abdomen | 412 |
| InjuHernia | 412 |
| InjuCongenital Scrotal Hernia | 413 |
| InjuInjuHernia Infantilis | 414 |
| InjuHerniaInguinal | 415 |
| InjuHerniaCrural or Femoral | 416 |
| InjuAscites | 435 |
| InjuOvarian Dropsy | 436 |
| Bruises of the Abdomen | 438 |
| Lumbar Abscess | 441 |
| Spina Bifida | 444 |
| Affections of the Rectum and Neighbouring Parts | 445 |
| InjuHemorrhoids or Piles | 445 |
| InjuryDistinct Varieties | 445 |
| InjuInflammation of the Rectum | 447 |
| InjuFistula | 449 |
| InjuStricture | 450 |
| InjuSchirro-contracted Rectum | 452 |
| InjuProlapsus Ani | 453 |
| Pruritus of the Rectum | 460 |
| Neuralgia of the Rectum | 460 |
Affections of the Mucous Membranes of the Urinary and Genital Organs | 461 |
| InjuGonorrhœa | 462 |
| InjuHernia Humoralis | 467 |
| InjuInflammation of the Bladder | 469 |
| InjuIrritable Bladder | 470 |
| InjuStricture of the Urethra | 470 |
| InjuFistula in Perineo | 472 |
| Retention of Urine | 478 |
| Incontinence of Urine | 489 |
| Gonorrhœa Præputialis | 490 |
| Phymosis | 491 |
| Paraphymosis | 491 |
| Hypospadias and Epispadias | 495 |
| Chimney-sweeper’s Cancer | 495 |
| Hydrocele | 496 |
| Cirsocele | 501 |
| Hæmatocele | 503 |
| Sarcocele | 505 |
| Castration | 507 |
| Calculus Vesicæ | 508 |
| InjuLithotrity | 517 |
| InjuLithotomy | 519 |
| Calculus in the Female | 530 |
| Gonorrhœa in Females | 531 |
| Gonorrhœal Lichen | 532 |
| Retention of Urine in Females | 533 |
| Vesico-vaginal Fistula | 534 |
| Imperforate Vagina | 535 |
| Contracted Vagina | 535 |
| Inflammation of Vagina | 536 |
| Polypus Vaginæ | 537 |
| Diseases of the Uterus | 538 |
| Ligature of the Common Iliac Artery | 539 |
| Ligature of theInternal Iliac | 539 |
| Ligature of theExternal Iliac | 540 |
| Ligature of theFemoral | 541 |
| Aneurismal Varix in the Thigh | 542 |
| House-Maid’s Knee | 543 |
| Cartilaginous Bodies in the Knee-joint | 544 |
| Distortion of the Feet | 545 |
| InjuVarus | 547 |
| InjuValgus | 548 |
| InjuPes Equinus | 548 |
| InjuCalcaneal | 549 |
| Exostosis of Distal Phalanx | 551 |
| Fractures | 552 |
| Fracturesof the Cranium and Face | 558 |
| Fractures of theSpinal Column | 560 |
| Fractures of theThorax and Upper Extremity | 564 |
| Fractures of thePelvis and Lower Extremity | 574 |
| Disunited Fracture | 586 |
| Dislocations | 588 |
| InjuLower Jaw | 591 |
| InjuUpper Extremity | 592 |
| InjuLower Extremity | 600 |
| Sprain | 607 |
| Bruise | 610 |
| Amputation | 612 |
| Excision of Portions of Diseased Bones | 632 |
| Excision of Joints | 634 |
ELEMENTS OF SURGERY.
PART FIRST.
OF INFLAMMATION.
There are few accidents or diseases, to which the human body is liable, which are not preceded or followed by incited action, increased circulation, and accumulation of blood in the capillary vessels of the part affected; and these phenomena require to be very attentively studied, and correctly understood, by all who propose practising the healing art. As all the salutary as well as diseased processes which occur in the human body are more or less attended or affected by this action, and as its regulation forms a principal part of the duty of the surgical practitioner, this work cannot be more properly commenced than by treating of its nature, consequences, and management.
Inflammation may be defined to be, an unnatural or perverted action of the capillary blood vessels of an organ or part of the body, attended with redness, throbbing, swelling, pain, heat, and disorder of function, as well as with more or less disturbance of the system.
Every part of the body is liable to inflammation; and some writers have divided this action into different kinds, according to the particular tissue which it chiefly involves. But it appears to be always of the same character, though modified by various circumstances, such as the tissue in which it occurs, the state of the constitution, the exciting cause, and the intensity of the action.
The usual division of the subject, into Acute and Chronic, is that which it is here proposed to adopt. The term Chronic Inflammation is more properly applicable to a consequence of the Acute: but it is at the same time true, that morbid actions proceed more slowly in some constitutions, and in some parts of the body, than in others; and that changes of structure and morbid products, such as generally result from inflammatory action, even occasionally occur, without the prominent symptoms of inflammation being experienced by the patient or detected by the practitioner.
The term Morbid is used in contradistinction to what is called Healthy Inflammation; but inflammatory action is generally connected, more or less, with a diseased or disordered state of some part of the body. In many circumstances it is highly necessary that a certain degree of incited action of the vessels should occur, and continue for a certain time; as during the uniting of fractures, the adhesion of wounds, and the healing of some sores—and thus far it is healthful: when, however, the action becomes excessive, it must, for this reason, be considered morbid, as it frustrates the natural reparative process; if the action, in fact, proceeds farther than is necessary for reparation, it becomes a disease, and leads to absorption or destruction of parts. In animals possessing the greatest powers of reparation, inflammation, it appears, does not take place at all, or is very slight, and scarcely ever proceeds to suppuration.
Redness is the first sign of inflammation to be considered; this is observed, in the living body, on the surface, or at the extremities of those canals which terminate externally. The inflamed conjunctiva affords a conspicuous example of this appearance. In a subject that has suffered from an internal inflammatory attack, a good opportunity is frequently afforded of observing the enlarged and injected state of the vessels on which the red colour depends. But inflammation may have existed to a certain degree, and yet the parts may be pale, from the capillaries having emptied themselves into the veins immediately after the patient’s death. The paleness may be also in part caused by the influx of the red globules being impeded immediately after death, or when the patient is in articulo mortis, in consequence of the contraction of the vessels, which is well known to occur at that period.
It has been said that redness is not essential to inflammation; for serous vessels may be altered in size and function by this action, and yet not be sufficiently dilated to receive the red globules of the blood. And, again, that serous vessels may be enlarged so as to admit the red globules; and a part that is colourless when in the healthy state may, in consequence, assume a highly red hue when in an inflamed condition. This may be observed in the cornea lucida, which, when violently inflamed, is pervaded by numerous vessels, visible to the naked eye, distended with red blood, ramifying over the whole of it, and freely inosculating with each other. Some have even supposed that these vessels are newly formed, in consequence of inflammatory action. This opinion is, however, erroneous; as the vessels existed in the cornea previously, and are only increased in size, so as to admit of the accumulation of a sufficient number of red particles to render the vessels visible. The speedy, and, in many cases, instantaneous, appearance of red vessels where they could not previously be observed, decidedly overturns the opinion that new vessels are in such a case formed. New vessels are seldom formed, unless after a breach of structure, or in cases where morbid deposits become vascular. There is no proof of the existence of mere serous vessels in the human body, as any one may ascertain who is accustomed to examine the capillaries with a good microscope. Vessels which are so small as to admit only a very few, say one, or at most two rows of globules, would, of course, appear colourless, and these are what have been called serous vessels. The globules of blood are so small as to be invisible to the naked eye; and vessels carrying only one series of them would appear colourless. No vessels belonging to the sanguiferous system have ever been observed less in character than a blood globule; and this, so far as I have been able to observe, is, as nearly as possible, 1/3000 part of an inch. They appear to be flattened discs; and whether those of the human body have a central nucleus or not, seems, as yet, very doubtful. The globules are here shown upon a scale of 1/4000 part of an inch, linear, and in different positions. They are represented, as seen in the greater number of microscopes, having a central nucleus. Whether, in the blood of mammiferous animals, or not, this is an optical deception, is not very clearly made out; but in that of reptiles the nucleus is easily demonstrable. The redness then is not from error loci, or in consequence of red particles flowing where none flowed before, but from the capillaries becoming distended and dilated with an unusual quantity of blood, which is stagnated in the central part of the inflamed neighbourhood, the inflammatory focus.
Throbbing, to a greater or less degree, is always felt in an inflamed part by the patient; and it is frequently so distinct as to be readily perceived by an attentive examination. This arises, probably, from the stagnation of blood in the vessels of the part over-excited, and principally affected by the disease or injury, causing an increase in the collateral circulation; and it is this rapidly increased action around that gives rise to the signs and symptoms, and constitutes, in point of fact, what is known and recognised as inflammation. The sensation of throbbing is not, however, produced entirely by the action of the capillary vessels, but in consequence, also, of the larger trunks in the neighbourhood sympathising with these capillaries, and so having their action increased also. The obstruction of the capillaries in the early stage of inflammation must necessarily cause a greater force of the heart to be expended on the trunks leading to such capillaries; hence the greater impulse and velocity of blood in the circumferential and patent vessels. In fact, when the inflammatory action is extensive or severe, or when the part affected is of much importance to life, the whole circulating system is disturbed, and thus arises the sympathetic excitement of the constitution.
The incited action of those vessels in the more immediate vicinity of the inflamed part is well marked in cases of Paronychia. There the digital, the radial, and ulnar arteries, with their branches, beat more violently than usual; and with much greater force, though not more rapidly, than the vessels in other parts of the body.
Swelling is caused by the enlarged and overloaded vessels relieving themselves by effusion of part of their contents into the surrounding cellular texture. The effusion varies in extent and consistence, according to the degree of inflammatory action, and the species of resistance offered; at first it is serous, then mixed with fibrin, and consequently spontaneously coagulable. Cæteris paribus, the greater the resistance, the less the effusion, and the more violent the inflammatory action; the chance of its speedy and favourable termination is also more diminished. Even the enlargement of the bloodvessels produces a certain degree of intumescence previous to effusion. The relief to the vessels by effusion giving rise to swelling, when it occurs in loose cellular tissues, may be considered as a beneficent provision of nature. But in vital organs it may be productive of the most serious consequences; as in these, very slight effusion will often endanger the structure of the organ, destroy its functions, and not unfrequently be attended with fatal consequences.
The nature of the effused fluid varies according to the degree of violence and advancement of the action, and is also modified by the texture in which that action occurs. It may consist of serum, lymph, blood, or pus. In inflammation, in short, exhalation, though at first diminished, is soon much increased, whilst the powers of the absorbent vessels are diminished, or at least do not maintain their usual relation to those of the exhalants.
Pain is the next symptom enumerated. Here the very common error of supposing that where there is pain there must always be inflammation may be noticed. Some diseases attended with the most acute pain, as Tic Douloureux and Cramp, are generally unattended with inflammation. Many chronic diseases, too, are accompanied with violent and long-continued paroxysms of pain, without excited circulation of the part.
This erroneous opinion often gives rise to highly prejudicial proceedings, as—the exhausting, by copious depletions, the vital powers of patients, already enfeebled by continued disease or treatment—the consequent aggravation of the urgent symptoms—and, the then only termination of the disease and of the practice, death.
Again, it is true that we must bleed, in some cases, with the view of preventing the occurrence of inflammation; yet the prophylactic treatment may be carried too far, as in cases of violent injuries, or after severe operations. In these instances, the immediate abstraction of blood, so far from being beneficial, expedites the dissolution of the patient, or at least greatly retards the cure. Pains arising from local irritations are often treated in a similar way, whilst the removal of the cause would be much more likely to restore the natural action of the parts.
Though inflammation does not always accompany the sensation of pain, yet the latter, in a greater or less degree, attends inflammatory action; and, perhaps, it is fortunate that it does so. Because, were it not for the occurrence of pain, the patient’s attention would not be directed to the disease; he would continue to use the part as if in health, and the affection would thus be much aggravated. Whereas, according to the existing provision of nature, pain is felt at the commencement of the action, the presence of which the patient is thereby made aware of; and he is compelled to employ such measures for its removal as reason naturally dictates, of which none is more effectual than disusing the affected part. The nerves are thus the safeguards of the various parts of the body in health—their nurses in disease. A part deprived of sensation may be used, even to the destruction of its texture, without producing any impression on the sensorium, and consequently without the animal being conscious of it.
The presence of pain, as a symptom of inflammation, may be easily explained. The connexion of the vascular with the nervous system is very constant and intimate. Their ramifications accompany each other, and are contained in the same cellular sheath; and without the reciprocal influence of each, neither could perform its functions perfectly. By injecting a limb soon after its separation from an animal, and before its vital heat has departed, spasms of all muscles are sometimes produced; showing the intimate connexion between these two systems. This, however, is distinct from the contractions of the muscular fibre produced by the application of stimuli. In the former case, the contractions are universal, and induced through the medium of the nerves. In the latter, the irritability of the fibre is excited.
When the circulation is excited, the nerves accompanying the affected vessels are unusually compressed, and over-stimulated by the circulating fluid, in which, probably, some change takes place, and in this manner unnatural impressions are produced; the nerves themselves are likewise the seat of disease, in consequence of the enlargement of the minute capillaries which permeate them. Over-distension of the coats of the vessels may also be supposed to give rise to painful feelings, independently of any affection of the accompanying nervous trunks.
The degree of pain is generally in proportion to the sensibility of the part when in health; it also depends upon the distensibility of the parts affected, and on the intensity of the inflammatory action. When bones, tendons, &c., which in their uninflamed state are nearly insensible, become inflamed, the pain and suffering are most excruciating, owing to the resistance opposed to the dilatation of the vessels, and the prevention of the effusion by which they naturally relieve themselves.
The kind of pain also varies, in consequence of different modifications in the action causing different impressions on the sensorium. Pain is not always increased in proportion to the natural sensibility of the part; for in some instances the sensibility is rendered much more intense, while in others it is much obtunded.1
The last, and, according to some writers, the only unequivocal symptom of inflammation, is Heat. In extravasation of blood into the cellular texture, as under the conjunctiva, there is redness, swelling, and occasionally pain; but at first, and unless the action of the bloodvessels be excited, there will be neither heat nor throbbing. In many internal inflammations heat is much complained of; and in Enteritis it has been considered a pathognomonic symptom.2
The signs, symptoms, and consequences of inflammation—and amongst others, heat—are modified by the distance of the affected part from the centre of circulation. All actions, healthy as well as morbid, proceed with more vigour in the superior extremities—in the head, the neck, and the trunk, than in the more remote parts of the body; for to the former the blood is transmitted more speedily, if not in greater quantity, and is not so liable to be impeded in its return. Hence an arm may bear up under a severe injury, which, to an inferior extremity, would prove inevitable destruction. The heat, however, of an inflamed part, is generally supposed to be much greater than it really is. The sensation of heat is considerable to the patient, as well as to any observer, whilst the absolute increase of temperature is very slight indeed. It has been proved by the most decided experiments of Mr. Hunter, on the mucous canals of animals, first when in health, and again after violent inflammation had been excited, that little or no variation of temperature can be observed. The elevation of temperature is probably constant, though only amounting to a degree, or even less. As the blood is the source of heat, wherever an increased quantity is circulated, there should, to some extent, be increased heat.