The practice of surgery . lna, as well as completely pronated, by the action of the pronator quad-ratus. And the supinator radii longus assists powerfully, by tilting upthe styloid process to which it is attached, in displacement towards theulna. In treatment, the forearm is flexed, and placed in the middlestate between pronation and supination; the interosseous pads are care-fully adjusted; the long splints are applied on either aspect, projectingbeyond the knuckles ; the hand, bandaged separately to prevent con-gestion, is excluded from the retentive apparatus, and left pendent—so that by it
The practice of surgery . lna, as well as completely pronated, by the action of the pronator quad-ratus. And the supinator radii longus assists powerfully, by tilting upthe styloid process to which it is attached, in displacement towards theulna. In treatment, the forearm is flexed, and placed in the middlestate between pronation and supination; the interosseous pads are care-fully adjusted; the long splints are applied on either aspect, projectingbeyond the knuckles ; the hand, bandaged separately to prevent con-gestion, is excluded from the retentive apparatus, and left pendent—so that by its weight it may counteract the displacing tendency of thelong supinator, and separate the radius from the ulna at the point offracture. 3. At the Distal Extremity.—This, too, is a very common result offalls on the hand. The radius being mainly concerned in the carpalarticulation, to that bone the shock is chiefly and directly conveyed;and solution of continuity is extremely probable, more especially if any [Fig. 144.]. [Illustration of the deformity produced by fracture of the distal extremity of the Radius. (From Fergus-son.)—Ed.] degree of twisting have been at the same time applied. The line offracture may be either transverse or oblique. The upper fragment isdisplaced inwards by the pronator radii quadratus; causing an abnormal 320 FRACTURE OF THE RADIUS. prominence on the palmar aspect, with a corresponding depression onthe dorsal. There is pronation; and, on coaptation and extension, crepi-tus may be detected. The hand, following displacement of the lowerfragment of the radius outwards, leaves the end of the ulna unusuallyprominent—as if dislocated. Luxation of the carpus, indeed, is in nota few cases closely simulated. The diagnostic marks are—detection ofcrepitus, mobility at the injured part, and in general non-continuity ofthe bone as evinced on rotation. But the case becomes obscure whenthe line of fracture is oblique, and impaction has occurred [Principles
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