Ligature (surgery)

“ A ligature should always be round and small, provided it be sufficiently strong. The strength of a ligature is variously estimated; some surgeons trying it by the strength of their own fingers, others by what they conceive to be the resisting power of the coats of the artery, in which perhaps they may err. The only way in which a surgeon can hope to acquire correct information on this point is by trying on the dead body what force of fingers is required to cut the inner coats of arteries of various sizes ”

“ Removal by ligature is generally the most advisable method of extirpation. The site and nature of the attachment are ascertained, and a strong wire of fine silver, or a piece of whipcord, is noosed round the base by the finger, and pushed down close to the origin, care being taken not to include the healthy parts beyond the growth. The ligature is tightened by passing it through a canula, or along a strong probe, with a ring at each extremity, to the lower of which it is secured. It is drawn more tightly from time to time, till the tumour drop away. ”

“ When many ligatures are employed and foreign substances placed in the wound, the patient can scarcely be expected to escape profuse bleeding. If, however, the operation by single ligature be properly performed, and the coats of the artery be sound at the deligated point, the occurrence of secondary hemorrhage must be rare. It generally supervenes when the ligature is about to separate: at first there is a thin bloody discharge, afterwards the quantity of blood is more copious ”

“ If a small quantity only of blood has escaped, its diffusion and increase may be prevented by the bandage: but a cyst will nevertheless be formed in the cellular tissue; its parietes will communicate with the margins of the aperture in the artery, its cavity with the canal of the vessel; an aneurism of the false kind will be established, and will run the course of one arising spontaneously.
A ligature, well applied, is the only means that can be relied on. ”

“ When hemorrhage takes place after amputation at or below the shoulder-joint, it is a dangerous occurrence. An incision should then be made through the integuments and across the great pectoral muscle, when the artery may be readily exposed, and a ligature placed upon it without difficulty anywhere below the clavicle. ”

“ For below the elbow spontaneous aneurism is almost unknown, and even traumatic aneurisms are extremely rare. It is therefore for hæmorrhage only that the vessels are likely to require ligature, and it is a rule in surgery that to enlarge the wound and to apply a ligature above and below the bleeding point is better practice than to apply a ligature at a distance. ”

“ Such complications can do no good, and may do much mischief. The artery must be greatly detached from its surrounding connections before the numerous and flat ligatures can be applied, in consequence of which its coats will be apt to slough or ulcerate, and hemorrhage occur. When, from any cause, the vessel has been detached to a greater extent than is sufficient for the passing of one ligature, two ought undoubtedly to be used, and one applied close to each extremity where it is attached to the surrounding parts. ”

“ After the operator has gained some experience in this simple mode of tying the pedicle, he may, if he thinks it desirable, practise other methods.
After securely applying the ligature the tumour is removed by snipping through the tissues on the distal side of the ligature with scissors. Care must be taken not to cut too near the silk, or the stump will slip through the ligature; on the other hand, too much tissue should not be left behind. The stump is seized on each side by pressure forceps, and examined to see that the vessels in it are secure; it is then allowed to retreat into the abdomen. ”

“ To tie veins, artery, nerves, vas deferens, and cellular tissue, in one mass, would lead to most serious mischief, not to mention the immediate and excruciating pain occasioned. It has been recommended either to pass a temporary ligature round the chord, before its division, to prevent retraction, or to tie the artery before it is cut across. I have never found either practice necessary; the latter retards the operation; the fingers of an assistant are generally as effectual as a ligature, and inflict less injury to the parts, and less pain to the patient. ”

“ If a divided artery is _ligated at its cut end_, the tension of the ligature is usually sufficient to rupture the inner and middle coats, which curl up within the lumen, the outer coat alone being held in the grasp of the ligature. An internal clot forms and, becoming organised, permanently occludes the vessel as above described. ”

“ When arteries are unhealthy, the selection and proper application of a ligature are points of great importance. A larger although yet a small, round ligature should be fairly, evenly, and firmly, although not so forcibly applied as on a sound artery ”

“ When a ligature is to be placed on the brachial artery in the upper part of its course, the incision should be made about three inches in length, directly on the line of the pulsating vessel, by which all mistakes will be avoided. The integuments should be divided carefully, that the internal cutaneous nerve may not be injured; the fascia is then to be cut through and the forearm bent, when the vessels and nerves will be relaxed. The artery is to be separated from its veins, one on each side ”

“ An attempt should be made to close the wound in the duct by means of a fine suture; failing this, the duct must be occluded by a ligature as if it were a bleeding artery. The tissues are then stitched over it and the skin wound accurately closed, so as to obtain primary union, firm pressure being applied by dressings and an elastic webbing bandage. Even if the main duct is obliterated, a collateral circulation is usually established. A wound of the right lymphatic duct is of less importance.
Subcutaneous rupture of the thoracic duct may result from a crush of the thorax. ”

“ The ligature should be passed from the inner side to avoid including the vein, and thus there will be{10} less chance of wounding the peritoneum from the convexity of the needle being applied to it. If possible, the genito-crural nerve should not be included in the ligature, but probably such an accident would do no great harm.
It is of much more consequence to avoid injuring the peritoneum. This is sometimes very difficult, from the adhesions which are set up between the peritoneum, the artery, and especially the aneurism, as the result of pressure and inflammation. ”

“ I then laid the cavity freely open, and with both hands scooped out nearly seven pounds of coagulated blood, as was ascertained by measurement. The axillary artery appeared to have been torn across, and as the lower orifice still bled freely, I tied it in the first instance. I next cut through the lessor pectoral muscle close up to the clavicle, and holding the upper end of the vessel between my finger and thumb, passed an aneurism-needle, so as to apply a ligature about half an inch above the orifice. ”

“ When an opening in the cancellated tissue, leading to an internal sequestrum, is minute, enlargement is effected by means of either the trephine or the cutting pliers: afterwards, gouges, gravers, &c., may sometimes be useful in operating on the soft texture underneath,—but they are seldom requisite. The bleeding from the soft parts is free; the vessels do not retract, and may require the application of a needle and ligature. That from the bone is easily arrested by pressure: the cavity is filled with charpie or with dossils of lint, and these are supported by a bandage. ”

“ When the radial artery is wounded in the hand, in which situation it is deep seated, the case requires greater consideration. When there is a large open wound, and the bleeding end or ends of the artery can be seen, a ligature should be placed on each ”

“ These conditions may be prevented in many ways. The tissues included in the ligature are not always free from infective organisms, especially the Fallopian tube, which is usually included in the ligature, and this structure, especially in cases where oöphorectomy is performed for inflammatory diseases, often contains septic microbes; this endangers the ligature and leads to the formation of pus, with its complications, sloughing of the pedicle and abscess. ”

“ In separating the soft parts from its neck, the edge of the knife should be always directed to the bone, to avoid the nerves and vessels on the inside. In some cases of injury, very little additional wound may be requisite. The glenoid cavity may, in consequence of being seriously involved in disease, also require removal; this is best accomplished by large cross-cutting pliers. Few vessels require ligature. The edges of the wound are brought together; the elbow is supported, and the arm fixed to the trunk, in order to keep the bones in apposition, and prevent motion. ”

“ In the latter instances, all afflux of nutriment and heat being prevented by the ligature, we see the testes and large fleshy tumours dwindle, die, and finally fall off.
Ligatures of medium tightness I regard as those which compress a limb firmly all round, but short of pain, and in such a way as still suffers a certain degree of pulsation to be felt in the artery beyond them. Such a ligature is in use in blood-letting, an operation in which the fillet applied above the elbow is not drawn so tight but that the arteries at the wrist may still be felt beating under the finger. ”

“ Yet this plan continued more or less in vogue down to the discovery of the ligature in the 16th century, and was practised even later in Germany by the celebrated Hildanus (1641) ; although he subsequently adopted the new method. According to another fashion, the surgeon, after making a tedious division of the flesh down to the bone, with studied endeavour not to divide the arteries until the last moment, relied on applications of red-hot irons, or of some styptic fluid, usually a powerful acid or astringent, to arrest the bleeding. ”

“ Even this operation, however, in two cases of femoral varix failed to effect more than a temporary cessation of the symptoms, although the ligatures were placed but a short distance from the communication. Failure is due to the presence of collateral branches, which are not easy of detection. Even when the vessels lie exposed, the even distribution of the thrill renders determination of the exact point of communication difficult, and the difficulty is augmented by the temporary arrest of the thrill following the [Pg 148] application of a proximal ligature to the artery. ”

“ The Artery ought not to be cut between the two Ligatures, lest the first Ligature shou'd be forc'd by the Impulsion of the Blood; but the Thread must be let fall, that it may rot with the Suppuration. Then the Wound may be dress'd with Pledgets, Bolsters strew'd with Astringent Powders and a Plaister; a Bolster being also laid in the Fold of the Elbow. ”

“ On the other hand, there is the remarkable success attained by surgeons who have constantly practised, with great skill, the ligature. The success of Mr. Syme in the ligature of the femoral artery for popliteal aneurism has been so great that any one who might fairly expect to attain nearly the same measure of skill would undoubtedly follow the ligature rather than the pressure. ”

“ If a stick cannot be got, take a handkerchief, make a cord bandage of it, and tie a knot in the middle; the knot acts as a compress, and should be placed over the artery, while the two ends are to be tied around the thumb. Observe always to place the ligature between the wound and the heart. Putting your finger into a bleeding wound, and making pressure until a surgeon arrives, will generally stop violent bleeding. ”

“ The sutures are inserted very much in the same manner as in the ordinary operation for ruptured perineum. The advantage of this plan of treatment is that primary union is secured and the patient recovers in a shorter time than would have been the case after one of the operations which aims to secure union by granulation.
Treatment by Ligature.—There are two methods of using the ligature, which we may term the immediate and the mediate. ”

“ When, from a rupture of the peritoneum, the omentum is prolapsed, and either becomes livid or black, the part anterior to the black portion may be included in a ligature, for fear of hemorrhage, and then the part behind the ligature is to be cut off, and the extremities of the ligature allowed to hang from the under part of the sewed wound of the abdomen, in order that they may readily escape when cast off by the suppuration of the wound. ”

“ In the case of the arm, digital compression is always to be preferred, in view of the well-known danger of damage to the brachial nerves from the tourniquet.
Proximal ligature is always to be avoided. It is inadequate, and proved more dangerous as far as the vitality of the limb was concerned, the latter point probably depending on the interference with the collateral circulation by pressure from the extravasated blood, which is unrelieved by the operation. I know of at least two cases of gangrene which occurred consecutively to proximal ligature of the femoral artery for this condition. ”

“ Then came Lord Lister's work on the absorb able ligature; and out of this and much other g " experimental work has come the present use of the ligature in f its utmost perfection-a thread that can be tied, cut short, and left in the depth of the wound, with absolute certainty "' that the wound may at once be closed from end to end and °| nothing more will ever be heard of the ligatures left buried in the B tissues. The choice of materials for the ligature is wide. Some surgeons prefer catgut, variously prepared; others prefer silk ”