[17] Sir W. MacCormac, Lancet, vol. i. 1900, p. 876.
CHAPTER V
INJURIES TO THE BONES OF THE LIMBS
Injuries to the bones of the limbs formed a very large proportion of the accidents we were called upon to treat, and afforded as much interest as any class, since they possessed many special features. I shall hope to show, however, as in some of the other injuries, that these features differed only in degree from those exhibited by injuries from the old leaden bullets of larger calibre, although with few exceptions they were of a distinctly more favourable character.
It is of considerable interest to note that, taking the fractures as a whole, there was a somewhat striking change in their nature during the earlier and later portions of the campaign. In the earlier stages I think there is no doubt that punctured fractures were proportionately more common than in the later, when comminuted fractures were much more often seen. There was, I believe, a source of error in this opinion, as far as I myself was concerned, in that the first cases I saw were at Capetown and had come from Natal. There is no doubt that the punctured fractures were earlier fit to travel, and hence a larger number of them found their way to the Base hospitals at a period when the comminuted fractures were still in the Field or Stationary hospitals. I do not, however, rely on the cases seen at Capetown alone for my opinion, as while at the front I saw the same large proportion of clean punctures in the early engagements of the Kimberley relief force.
I am inclined to attribute the change to two reasons: first, I believe that the use of regulation weapons was more universal in the earlier part of the war, while later, as more men were engaged, the Martini-Henry came more into evidence, and the Boers took more freely to the use of sporting rifles and ammunition. Another element also in the less clean punctures of the short and cancellous bones was probably the less accurate and hard shooting of the Mauser rifles as they became worn; the bullets seemed to evidence this by the comparative shallowness of their rifle grooves, which, I take it, would mean less velocity and accuracy in flight. This would be of importance, since the clean puncture of cancellous bone was no doubt favoured by a high rate of velocity.
The special features of the fractures caused by the small-calibre bullets were: (1) The nature of the exit wound, which in a certain proportion of the cases exhibited the so-called 'explosive' character. (2) The presence, in a marked degree in the severe cases, of the condition spoken of in Chapter III. as 'local shock.' (3) The striking contrast of clean perforation and extreme comminution in different cases. (4) The occasional occurrence of fractures of a very high degree of longitudinal obliquity. (5) The rarity of any that could be termed transverse fractures. (6) The general tendency of longitudinal fissuring when it occurred to stop short of the articular extremities of the bones.
It will perhaps be most convenient to consider first the explanation of the development of the so-called explosive apertures, and then to pass on to a general consideration of the types of fracture commonly met with, before proceeding to the description of the injuries to the separate bones.