随意型皮瓣蒂宽瓣宽比例与皮瓣成活长度关系的实验研究

Experimental study on the relationship between the ratio of pedicle width to flap width and the surviving length of the random skin flap

目的揭示随意型皮瓣蒂宽瓣宽比例与皮瓣成活长度的关系。方法在6只小猪背躯干部制作7组瓣同蒂不同、蒂同瓣不同的42块窄蒂随意型皮瓣,对其进行荧光素钠染色、ECT 静态和动态血流测定、成活面积微机分析等观察。结果①在机体一定部位窄蒂随意型皮瓣蒂宽的变化不影响瓣的成活长度,因此宽蒂设计并不具明显临床意义且不便于旋转。②在相同长度下皮瓣的宽度超过蒂宽的3或4倍不影响皮瓣的成活,但成活面积却因瓣宽变化而显著增加。③随意型皮瓣一定宽度的蒂部所带动的皮瓣成活面积接近以成活长度为半径的半圆形范围。结论机体一定部位随意型皮瓣的成活长度有其固有值,且蒂、瓣宽比例在1:3～1:4范围内变化不影响皮瓣成活。

Objective To clarify the influence of the ratio of pedicle width to flap width of a ran- dom flap on flap survival length.Methods 42 skin flaps in seven groups were created in 6 pigs' torso with different ratio of pedicle width to flap width.The flaps were evaluated with fluorescence examination, blood flow ECT test,and computerized analysis of survival area.Results The flap survival length of the seven groups was the same on the whole.The change in the ratio of pedicle width to flap width has noth- ing to do with flap survival length as long as the ratio is within the range of 1:1 to 1:4.Conclusion The random flap has a fixed survival length regardless of the width of the pedicle and the flap.The survival area of a random flap seems to approach a semicircle with a radius of the fixed survival length of the flap.