ISLAND SKIN FLAP WITH SIMPLE VENOUS PEDICLE:AN EXPERIMENTAL STUDY IN RATS / 解剖学报

ABSTRACT

126 adult male Wistar rats were used.A 4?6 cm~2 standard island skin flap wasraised on one side of the abdominal wall of the rats.In the flaps of the experim-ental group,only the superficial epigastric and lateral thoracic vein were preserved.The process of revascularization,histological changes,glycogen content and lactatedehydrogenase (LDH) activity of the flap were observed postoperatively with Indian ink injection,X-ray,microscopy and microspectrometry.The shrinking rateand degree of edema of the experimental flap were also observed and all comparedwith those of the control flaps.The results indicated that the flaps of experimentalgroup had a higher survival rate and lower degree of edema,and its glycogencontent and LDH activity decreased markedly on the lst postoperative day,andincreased gradully afterwards.Revascularization started on the 2nd postoperative day,such as capillary anastomoses passing through the cut edges of the flap,vesselsentering the flap from the recipient bed,vessels becoming tortous,dilated,andmarkedly proliferated.The results suggest that there was a true plasmatic circulationat the early stage in the simple venous flap and turns to a normal vascular type byrevascularization.The vividness of a flap may be indicated by the variance of themetabolism of carbohydrate in the skin flap.