Operative surgery . e apexof the styloid process of the radius. If the thumb be forcibly extended, theoutlines of the space will be well marked. The Operation.—Place the hand midway between supination and pro-nation, and, having ascertained the exact situation of the tendon of the ex-tensor primi internodii pollicis, make an incision near to its outer borderabout an inch in length ; use care not to divide the superficial veins. Theareolar tissue and the extensor primi internodii pollicis are pulled aside, andthe vessel found somewhat deeply situated. The needle can be carried ineither directio
Operative surgery . e apexof the styloid process of the radius. If the thumb be forcibly extended, theoutlines of the space will be well marked. The Operation.—Place the hand midway between supination and pro-nation, and, having ascertained the exact situation of the tendon of the ex-tensor primi internodii pollicis, make an incision near to its outer borderabout an inch in length ; use care not to divide the superficial veins. Theareolar tissue and the extensor primi internodii pollicis are pulled aside, andthe vessel found somewhat deeply situated. The needle can be carried ineither direction. 188 OPERATIVE SURGERY. The Fallacies.—The radial artery may lie upon the fascia and supinatorlongus instead of beneath them; it may pass over the extensor tendons of the thumb instead of beneath liTEmON OF EnEflSORm:ARPl RADIAUS LONGIOR .RADIAL NliTENDONOFEXTDISOR({SECUNDI mERNOail POLLICIS/EKTEN PRIM INTER. POLL .RADIAL A VEN/E COMITl VEN/Z COMIl (tendon OFEXTEN[CARP RAD LONGRADIAL A PJDDRSAL INTER-OSSEOUS M. them. The artery may be mis-taken for a radicle of the radialvein. The latter is superficial,and has likewise other character-istics of a vein. In ligaturing thevessel at either of the last twopositions sheaths of contiguoustendons will be opened if incau-tious vigor be exercised. The Results.—During the latecivil war the radial artery wastied twenty times, with four fatalresults. Ligature of tlie Ulnar Artery.—The ulnar artery is less fre-quently injured than the radial,and requires therefore less opera-tive interference than the latter. The Anatomical Points.—Theulnar artery is larger than the ra-dial. It is given off from thebrachial about one inch below thebend of the elbow, passes oblique-ly inward and downward deeplybeneath the superficial flexors of the forearm, and gains the ulnar side of theforearm a little above its middle; becoming more superficial, passes alongthe radial side of the flexor carpi ulnaris to the radial side of the pisiformbone, wher
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