Elements of Surgery

by Robert Liston

The axillary artery may be tied on account of wounds, either immediately upon the infliction of the injury, or some time afterwards. The dissection is difficult, the vein being much in the way, and the vessels surrounded by nerves, and intimately connected with them by dense cellular tissue. The artery is more involved at the middle portion of the axilla than at the superior and inferior; at that point, too, the cephalic vein, as well as the axillary, impedes the operator.

To reach the upper portion of the artery, much muscular substance must be divided. An extensive incision, in the course of the vessel, is made through the integuments. The pectoralis major is got through by separation and division of the fibres, the incision in it being made with as little cross-cutting as possible. Part of the pectoralis minor, probably the superior half of the muscle, must also be cut. The parts are then exposed, the vein to the inner side of the artery, and the nerves interlaced. The vessel is carefully isolated at one point, and there secured.

It is almost impracticable to reach the middle portion of the axillary—supposing the vessel to be divided into three equal portions—without injurious interference with the nerves. If operating with the view of tying the extremities of the vessels wounded at this point, the probability is that the nerves have been divided along with the artery, and then the proceedings are more simple. The incisions are made in the direction of the bleeding point; this is reached, and each extremity of the vessel securely tied.

The lower third of the artery is less involved with the vein and nerves, and can be reached without division of muscular fibres. The arm is abducted and elevated as much as possible. The axilla is thus exposed. A free incision is made in the course of the vessel, which, by cautious dissection, is brought into view; it can then be dealt with as may be required.

Spontaneous aneurism is of rare occurrence, lower in the brachial artery than its axillary portion. However, it is sometimes met with at the bend of the arm. But the aneurismal tumour in this situation is more frequently the consequence of wound of the vessel, inflicted whilst opening a superimposed vein. The mode of proceeding in venesection, the precautions to be employed, and the evils that sometimes follow this little operation, will be treated of by and by. Wounding of the artery is not so common an accident now as formerly. Venesection is not so universally and unnecessarily resorted to as formerly, and is performed by better instructed practitioners.

Puncture of the brachial artery, at the bend of the arm, is not uniformly followed by extravasation of blood, or by the formation of aneurism. That it is wounded is known by the impetuous and saltatory flow of florid blood, accompanied with a wheezing noise. In such circumstances, the thumb is placed firmly over the wound; the fingers separately, the hand and the forearm of the patient are all supported by uniform bandaging; and a graduated compress, supplying the place of the thumb, is firmly applied, and must be retained for many days. Thus extravasation is effectually prevented. But the measures must be adopted instantly, before the edges of the opening are rounded, and any quantity of blood has escaped into the cellular tissue; the apparatus must be well applied and retained. When pressure is required on any point, it is absolutely necessary to give support to the lower part of the limb, as was formerly insisted on; and the proceeding is, if possible, more necessary in this case, the requisite pressure being very great. If ordinary compression only, sufficient to prevent the flow of blood through the opening in the integuments, is applied, blood is extravasated into the cellular tissue, breaking it up, and causing condensation beyond; fluid blood accumulates in the space thus formed; the surrounding cellular tissue is more and more condensed, at length constituting a firm sac, confining the fluid, and communicating with the opening in the artery; in fact, a pulsating and gradually increasing aneurism is established.

Or a sac is formed, into which blood is propelled from the artery, and which also communicates with the opening in the vein. This state of parts is denominated varicose aneurism; it is very rare.

Or, again, no extravasation takes place, and the artery and vein unite by lymph effused around the openings, the wounds remaining unclosed, and forming a permanent communication between the vessels. Thus, a portion of the arterial contents is constantly being injected into the vein, producing a thrilling sensation, but little or no tumour. The passage of the blood through the narrow aperture is also accompanied by a peculiar noise, closely resembling that caused by the motion of the fly-wheel in a musical box. This disease is termed aneurismal varix, and is not so rare as the preceding. For this treatment is seldom requisite.

In recent cases of false aneurism, the sac may be cut into, the vessel exposed, and tied above and below the opening. This is recommended from its being found that the tumour is sometimes slow of disappearing after ligature of the vessel at a distance above. But when the tumour is of considerable duration and size, containing coagula, and the surrounding parts are separated and altered in structure, there is no doubt as to the propriety of tying the humeral near its middle—as also, in the case of spontaneous aneurism. The vessel is not deep, but much entangled with nerves and veins. A free incision is made over its course, dividing the skin, cellular tissue, and fascia; the sheath is opened, and a ligature passed round the exposed artery. But it must be recollected that high division of the humeral is not uncommon, and, before casting the knots, pressure should be made on the vessel with the finger against the loop of the ligature, and the effects on the tumour watched; if pulsation cease, and the tumour become flaccid, the ligature should be secured; but, if no effect is produced on the swelling, high division is demonstrated, and the other branch must be looked for. Pulsation is certain to return in the tumour, after a few days, and if slow in again disappearing, gentle pressure should be employed—the arm, hand, and fingers being previously bandaged, to prevent infiltration of the limb.[43]