摘要目的 总结重复皮肤扩张的经验,探讨其组织学和生物力学变化,为在临床的应用提供理论基础和实践经验.方法 对已扩张的皮肤进行重复扩张,分次修复缺损,首次扩张与重复扩张的时间间隔平均为8个月.将31例分为儿童组和成人组,对重复扩张术的治疗经验进行总结,测量首次和重复扩张后皮瓣的增长率,并做生物力学特性检测和病理观察,进行两组间的比较.结果 共治疗31例,第1、2次扩张过程中的并发症发生率分别为10%、17%,随访6～12个月,大部分治疗效果满意.重复扩张后两组的皮瓣增长率均下降、应力-松弛特性和断裂强度减弱、表皮增殖减少,尤以成人组较为显著.结论 皮肤重复扩张术是临床可行的手术方法,在儿童可取得比成人更加满意的手术效果,但因其风险增大、皮瓣质量下降,应用时应小心慎重.

abstractsObjective To summarize the experiences of repeated expansion surgery,to evaluate the changes of skin histological and biomeehanical properties,and to afford rationale for its application and popularization.Methotis Skin soft tissues were repeatedly expanded to repair the massive skin defection.All the 31 cases were divided into children group and adult group according to their ages.In each group the treatment experiences were summarized.The biomechanical and pathological properties were investigated and compared after samples had been made.Resuits A total of 31 cases were treated by serial tissue expansion.Complication incidences of every expanded procedure were 10%and 17%respectively.After 6-12months postoperative follow-up,most of the curative effects were satisfactory.The repeated expanded skin had lower enlarged rate,depressed stress-relaxation and stress-strength character,so was the deceased proliferation of the epidermal cells.The changes were significant in the adult group.Conclusions Repeated expansion is a feasible method of repairing the massive skin defection.Its curative effect is more satisfactory in children than adult.Due to the increase of the risk and skin quality decline,enough attention must be paid in clinical application.