患儿，男，12岁。1995年1月高压电击伤，于外院行右前臂及左拇指截除术。因头皮烧伤大片坏死，颅骨外露，行钻骨引髓，部分肉芽生长，但伴较重感染，于9月14日转入本院。查：一般状况尚可，头顶颅骨外露及头皮全层缺损约18×16cm，有大量脓性分泌物，局部有波动示有全层颅骨破 Children, male, 12 years old. January 1995 high-voltage electric shock, outside the hospital right forearm and left thumb amputation. Large scalp necrosis due to scalp burn, skull exposed, drill bone marrow, part of the growth of granulation, but with severe infections, transferred to the hospital on September 14. Check: The general condition is acceptable, head skull exposed and full-thickness scalp defect about 18 × 16cm, a large number of purulent secretions, there are fluctuations in the local full-thickness skull showed