A practical and systematic treatise on fractures and dislocations . pport. When the fracture is occasioned by a blow, or by the bodycoming in contact with some hard substance, it is apt to bemore serious in its nature and consequences, from the contu-sion and mischief done by the broken ends, than in fracturescoming from indirect violence. The situation of the fracturein the majority of instances, is near the centre of the the fracture is not far from the extremities, the acci-dent occurs near the acromion more frequently than in theimmediate vicinity of the sternum. The parts of the
A practical and systematic treatise on fractures and dislocations . pport. When the fracture is occasioned by a blow, or by the bodycoming in contact with some hard substance, it is apt to bemore serious in its nature and consequences, from the contu-sion and mischief done by the broken ends, than in fracturescoming from indirect violence. The situation of the fracturein the majority of instances, is near the centre of the the fracture is not far from the extremities, the acci-dent occurs near the acromion more frequently than in theimmediate vicinity of the sternum. The parts of the bonebetween the curves seem to possess the least powers of resist-ance. When the clavicle is broken near its middle, (Fig. 25),or between the middle and the sternum, the inner fragment isusually retained in its place by the ligaments, and counter- (104) Of the Clavicle. 105 balanced muscular action ; and the outer fragment in sonicinstances is drawn a little downwards, in others it is elevatedabove the inner. If the fracture be outside the middle of the Fig. Fracture of elnvicle near the middle of the bone, showingoverlapping and angular deformity. bone, the broken ends of both fragments are generally drawnupwards. Dr. R. W. Smith, of Dublin, in his Treatise onFractures in the vicinity of Joints, gives a description ofseveral specimens of fractured clavicle, in all of which the frac-ture described was within two inches of the acromial extrem-ity. According to his illustrations, the broken ends of bothfragments were drawn upwards, except in one or two instan-ces where the fracture occurred between the coraco-clavicularligaments. By the action of the trapezius muscle the frag-ments were elevated until they formed nearly a right anglewith each other, and large masses of osseous material (excessof callus) were poured around the seat of injury, even con-necting the irregular bony mass with the coracoid coraco-clavicular ligaments were either ruptured or lostin the
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectfractur, bookyear1870
