Cherry G W, Myers M B, Ardran G, Ryan T J
Plast Reconstr Surg. 1979 Aug;64(2):156-62. doi: 10.1097/00006534-197908000-00004.
Altering the position (elevated or dependent) had no immediate effect on the blood supply of delayed or transplanted delayed tubed flaps. However, after 72 hours the mean survival length in the dependent tubes was less than that in the elevated tubes. (This difference was only significant in the delayed untransplanted flaps, and not so in the delayed transplanted flaps). All of the dependent tubes had a significant increase in water content (compared to the elevated tubes). This increase was greater in the transplanted delayed tubed flaps. The tissue pCO2 levels were significantly increased after 24 hours in the dependent transplanted tubes, reflecting poor circulation and ischemia in them. The rate of clearance of subcutaneously injected technetium-99m was significantly increased in the dependent transplanted tubes after 72 hours, while in the elevated tubes the clearance rate was similar to that in normal skin. The morphological appearance of the vessels in these flaps complemented the results of the functional study.
改变位置（抬高或下垂）对延迟或移植的延迟管状皮瓣的血供没有立即影响。然而，72小时后，下垂管状皮瓣的平均存活长度小于抬高管状皮瓣的平均存活长度。（这种差异仅在延迟未移植皮瓣中显著，在延迟移植皮瓣中不显著）。所有下垂管状皮瓣的含水量均显著增加（与抬高管状皮瓣相比）。这种增加在移植的延迟管状皮瓣中更大。下垂移植管状皮瓣在24小时后组织pCO2水平显著升高，反映出其循环不良和缺血。72小时后，下垂移植管状皮瓣皮下注射锝-99m的清除率显著增加，而抬高管状皮瓣的清除率与正常皮肤相似。这些皮瓣中血管的形态外观补充了功能研究的结果。
