Oblique Fracture of the Humerus caused by a Fragment of a Vickers-Maxim or Pom-pom Shell
The entire absence of comminution is very striking
I will add one further case, that illustrated by plate XXV. In this a fragment of a pom-pom shell entered the outer aspect of the right shoulder to escape on the inner aspect of the arm, just below the confines of the axilla. An oblique, non-comminuted fracture of the humerus resulted, which in spite of moderate suppuration united well in the course of six weeks. The case is of particular interest as illustrating the nature of the fracture to be expected when the velocity retained by the missile is low.
The above instances show that such peculiarities as belong to wounds produced by pom-pom shells depend on the comparatively small size and weight of the fragments, and on the small degree of impetus with which they are propelled.
Fig. 95.—Boer Segment Shell, or Shrapnel.
The large fragment is a piece of the case, the smaller are two of the pieces of iron packed within
Fig. 95 illustrates a form of shrapnel employed by the Boers, the case of which is of cast metal arranged in definite segments, while the interior is filled with small fragments of iron so shaped as to pack in concentric layers. As to the wounds produced by the contained fragments I have no experience, since I never saw one of the pieces of iron removed. This no doubt depended in part on the very unsatisfactory practice made by the Boers with shrapnel generally. Even when they fired English shrapnel, the shells were, as a rule, exploded far too high to cause any serious danger to the men beneath. I saw on one occasion a large number of shrapnel shells exploded over a body of Imperial Yeomanry, but as a result of the great height at which all the shells were exploded, not a single casualty resulted.
The segment casing of the shell, however, I several times saw removed from the body. The fragment shown in fig. 95 was removed from the buttock of a man after one of Lord Methuen's early battles. It may be remarked that the buttock is rather a common, and also a favourable, seat for shell wounds with retention of the fragment. This no doubt depends on the fact that the buttock is one of the few superficial regions in which sufficient depth of tissue exists for the retention or the passage of so large an object as a fragment of shell.
Fig. 96 is of a number of leaden shrapnel bullets from our own shells. A normal undeformed bullet, such as was the usual cause of wounds, is shown at the left-hand upper corner. The remainder show common forms of deformity caused by striking on the ground or against rocks. I attribute small importance to the deformed bullets, as I never saw one removed, and it is probable that a ricochet shrapnel bullet would rarely retain sufficient force to penetrate. The lower fragments are inserted to illustrate a fact that would scarcely have been assumed, that these bullets on impact occasionally suffer a fracture of a somewhat crystalline nature. The occurrence of this gross form of fracture is of some interest in relation to the extreme fragmentation sometimes undergone by the hardened leaden cores of the small-calibre bullets.