. Regional anesthesia : its technic and clinical application . hand controls the position of the point of the needleunder the skin of the palm. The thumb is anesthetized either alone or with its metacarpal alone, a subcutaneous ring of infiltration is made at the root of thethumb (Reclus) by passing the needle through two wheals raisedone on each side of the first phaljux, ver^ near its dorsal aspect, inject-ing the solution around the entire circumference of the thumb, in aplane at right angles to its axis. About 5 of the 1 per cent, solu-tion is sufficient. The edematous ring th
. Regional anesthesia : its technic and clinical application . hand controls the position of the point of the needleunder the skin of the palm. The thumb is anesthetized either alone or with its metacarpal alone, a subcutaneous ring of infiltration is made at the root of thethumb (Reclus) by passing the needle through two wheals raisedone on each side of the first phaljux, ver^ near its dorsal aspect, inject-ing the solution around the entire circumference of the thumb, in aplane at right angles to its axis. About 5 of the 1 per cent, solu-tion is sufficient. The edematous ring thus produced is slightlymassaged and the operation begun only when the anesthesia has reachedthe tip of the thumb, which takes about five minutes. OPERATIONS ON THE TXPPEE EXTREMITIES 327 For the amputation of the thumb with its metacarpal, which is ex-tremely rare, or for any plastic operation on the thenar eminence, it ispreferable to block the median and ulnar nerves at the wrist and infil-trate the wrist bracelet, that is anesthetize the whole hand (page. Fig. 246.—Cross-section of the hand through the interosseous spaces, showingdirection of needle toward B in the palmar region; 3, 4, and B correspond to similarpoints in Fig. 248. 324). But if the operation is not likely to extend beyond the carpo-metacarpal joint, the following procedure is very satisfactory: Three wheals are raised on the dorsum of the hand, viz., the first,at the level of the carpometacarpal joint, almost on the radial aspect
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