. Operative surgery. Fig. 520.—Amputation through fourthand fifth metacarpal Fig. 531.—Amputation through one meta-carpal bone. and the articulation between the metacarpal bone and the trapezium isopened from the ulnar side, to avoid injuring contiguous joints (Fig. 516).The union of the flaps leaves a linear cicatrix (Fig. 517). AMPUTATIONS. 475 The Lateral-flap Method (Fig. 518).—The lateral-flap method can hemore quickly and easily performed than the former, hut leaves the cicatrixin a less advantageous situation. Abduct the thumb and enter the knifebetween the first and second meta
. Operative surgery. Fig. 520.—Amputation through fourthand fifth metacarpal Fig. 531.—Amputation through one meta-carpal bone. and the articulation between the metacarpal bone and the trapezium isopened from the ulnar side, to avoid injuring contiguous joints (Fig. 516).The union of the flaps leaves a linear cicatrix (Fig. 517). AMPUTATIONS. 475 The Lateral-flap Method (Fig. 518).—The lateral-flap method can hemore quickly and easily performed than the former, hut leaves the cicatrixin a less advantageous situation. Abduct the thumb and enter the knifebetween the first and second metacarpal bones, carry it up betvreen themwith a sawing motion, till the head of the first is reached. Cautiously dis-articulate the digit from within outward, increase the abduction, and carrythe blade through the joint and along the outer side of the metacarpal bone,thus making the outer flap, which should terminate opposite the web of thethumb (Fig. 519). Amputation through the Metacarpal Bones.—In amputation
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