A diffuse soft fluctuating swelling, sometimes accompanied by pulsation, but oftener without, developed, and not uncommonly diffusion was accompanied by some discoloration of the surface and elevation of the general temperature. Such arterial hæmatomata commonly developed from ten days to three weeks after the original wound. A few examples will suffice.
(1) A patient wounded at Elandslaagte was sent down to Wynberg. The antero-posterior wound in the upper third of the arm was healed, but a month after the injury a large fluctuating arterial hæmatoma developed in the axilla and upper third of the arm. This was incised (Colonel Stevenson) and a wound of the axillary artery in its third part discovered, and the vessel ligatured. The patient made an excellent recovery.
(2) A patient received a wound at Doornkop which traversed the calf in an obliquely antero-posterior longitudinal direction. Three weeks later a soft fluctuating swelling developed at the inner margin of the tendo Achillis occupying the lower third of the leg. Neither pulsation nor murmur was detected. There was anæsthesia in the area of distribution of the posterior tibial nerve. No tendency to further increase was observed, and operation was postponed. The temperature was normal.
(3) An Imperial Yeoman was struck at Zwartskopfontein at a range of one hundred yards. The man rode four miles on his horse after being hit, but the horse then fell and rolled over him twice. The man was treated successively in the Van Alen, Boshof, and Kimberley Hospitals, and from the last he was sent to Wynberg which place he reached on the twenty-third day. When admitted into No. 2 General Hospital the wounds of type form and size (entry, in posterior fold of axilla; exit, 1½ inch below junction of anterior fold with arm) were healed. The whole upper arm was swollen and discoloured, while an indurated mass extended along the line of the vessels into the axilla. This was considered a blood effusion; it was not obviously distensile, and pulsation was very slight. The brachial radial and ulnar pulses were absent. A fluctuating swelling was present along the anterior border of the deltoid. There were some signs of nerve contusion, but no paralysis, beyond tactile anæsthesia in the area of distribution of the median nerve.
Four days later little alteration had been noticed beyond a tendency to variation in firmness of the different parts of the swelling. On the thirty-first day considerable enlargement was observed. This enlargement, together with continued rise of temperature, aroused the suspicion of suppuration, and an exploratory puncture with a von Graefe's knife was made by Major Lougheed, R.A.M.C., after consultation with Professor Chiene. Blood clot first escaped, followed by free arterial hæmorrhage. The incision was enlarged while compression of the third part of the subclavian was maintained; a large quantity of clot was turned out, and an obliquely oval wound half an inch in long diameter was found in the axillary artery. Ligatures were applied above and below the opening between the converging heads of the median nerve. The veins were not damaged. The wound healed by first intention. On the twelfth day a feeble radial pulse was perceptible, and shortly afterwards the man left for England, diminished median tactile sensation being the only remnant of the original symptoms.
(4) A private of the 2nd Rifle Brigade was struck while doubling at Geluk, at a range of one hundred yards. The Mauser bullet entered four inches above the upper border of the left patella, internal to the mid line of the limb, and escaped in the centre of the popliteal space. The man lay in a farmhouse during the night and bled considerably from both wounds. He did not fall when struck, but could not walk. He was sent to No. 2 General Hospital in Pretoria. On arrival there the external wounds were scabbed over, and a large tumour existed beneath the entrance wound. There was much discoloration from ecchymosis, but no pulsation could be detected. The posterior tibial pulse was good. At the end of ten days pulsation became marked both in the front of the limb and in the popliteal space. There were no symptoms of nerve injury. On the thirteenth day an Esmarch's bandage was applied and Major Lougheed laid the tumour open opposite the opening in the adductor magnus. Much clot was removed, and both artery and vein, which were found divided in the adductor canal, were ligatured.
The foot remained very cold for the first twenty-four hours, but otherwise progress was satisfactory, the wound healing by first intention. No pulsation was palpable in the tibials at the end of a month.
For the last two cases I am very much indebted to Major Lougheed. I am glad to include them, as they illustrate one or two points of special importance. No. 3 shows the tendency to variation in the tension and firmness of the tumours, the tendency to primary contraction of the sac, followed by diffusion, and the rise of temperature often accompanying the latter occurrence. This is of great interest in relation to the similar rise of temperature seen with the increase of hæmorrhage in cases of hæmothorax. For purposes of comparison, the progress may well be considered alongside of that in the case related on p. 119, in which the wounded vessel was probably also the main trunk itself.
No. 4 differs from any of the others in depending on a complete division of a large artery and vein. The development of the hæmatoma was consequently more rapid and continuous. Another point of interest was the maintenance of pulsation in the tibial vessels, in spite of complete solution of continuity in the parent trunk. That this was independent of the collateral circulation seems evident from its complete disappearance and slowness of return after ligation of the wounded vessels.
Prognosis and treatment.—The treatment in these cases is sufficiently obvious, and consists in direct incision and ligature of the wounded vessels. The cases related show the success with which this procedure was attended, since uniformly good results were obtained. When possible, an Esmarch's tourniquet should be applied in the case of the lower limb. In the upper, compression of the subclavian is necessary during interference with axillary hæmatomata, combined with direct pressure on the bleeding spot after the clot has been removed. 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.