摘要
为比较筋膜皮瓣与普通皮瓣的愈合强度和柔顺性变化,在猪两后肢外侧,设计长宽比为2.5∶1的带蒂筋膜皮瓣或普通皮瓣,术后两型皮瓣愈合处拉力下降,远端切口愈合强度明显低于近端;筋膜皮瓣者高于普通皮瓣相应部位。随愈合时间延长,两型皮瓣切口愈合强度均增加,于第4周末,筋膜皮瓣各部间已无明显差异.普通皮瓣远端者仍不及近端。两型皮瓣术后应力—应变曲线左移、分散。筋膜皮瓣术后各部位曲线分散但差异不显著;普通皮瓣分散且差异显著。筋膜皮瓣具有切口愈合强度大,组织柔顺性好等生物力学特点,适于修复复杂、特殊部位软组织缺损、但长宽比宜有限度。
Pedicled fasciocutaneous and ordinary flaps,with the ratio of length to width of 2.5:1, were elevated on the lateral side of either hind limb in 6 pigs.Postoperatively the strength at the healing site was greatly lower than that of the normal skin and much lower at the distal part of the flaps.In the fasciocutaneous flap,the strength was stronger than that of the ordinary flap at the corresponding sites. The healing strength increased with time.At the end of the fourth postoperative week,there were no obivous differences of healing strength between different sites in the fasciocutaneous flap.Yet the heal- ing strength was still weaker at distal part in the ordinary flap.The stress-strain curves shifted to left in both flaps.There were no obvious dfferences between the proximal and distal sites in fasciocutaneous flap but there was difference in the ordinary flap.With good biomechanical characteristics in healing strength and flexibility,the fasciocutaneous flap is suitable for repairing soft tissue defects in complicat- ed or special area,but attention should be paid to the limitation to ratio of the length to width.
关键词
筋膜皮瓣
生物力学
愈合强度
Fasciocutaneous flap
Biomechanics
Healing strength
