【摘要】 目的　观察任意型皮瓣掀起后皮瓣远端组织内一氧化氮 (NO)含量的变化和外源性L 精氨酸 (L arginine ,L arg)对任意型皮瓣成活的影响。方法　采用Wistar大白鼠为实验动物 ,在其背部形成 7cm× 2cm任意型皮瓣 ,通过图像分析技术和不同时间远端皮瓣组织匀浆中NO-2 NO-3含量测定 ,观察皮瓣掀起后皮瓣组织内NO含量变化 ,和NO前体L arg对皮瓣成活的影响。结果　实验组皮瓣成活率明显高于对照 2组 (P <0 0 1) ,组织学检查发现实验组皮瓣组织炎症细胞浸润较对照 2组少 ,组织匀浆NO含量结果发现 :术后即刻各组NO含量差异无显著性意义 (P >0 0 5 ) ,术后 8、12、2 4和 72h各组存在差异有显著性意义 (分别为P <0 0 1,P <0 0 1,P <0 0 5和P <0 0 1) ,实验组明显高于对照 2组。结论　皮瓣掀起后 ,组织NO含量早期有所升高而后降低 ;应用外源性L arg可以提高皮瓣组织中NO含量和皮瓣成活率。更多还原

【Abstract】 Objective To investigate the changes of nitric oxide concentration in the distal portion of a random pattern skin flap and the influence of the exogenous L-arginine on the survival of the random pattern skin flap. Methods A random pattern skin flap (7 cm× 2 cm ) was cranially designed and elevated on the back of a Wistar rat. An image analysis technology was used to evaluate the survival rate of the skin flap, while a biochemistry method was used to test the concentrations of the NO in the tissue. Results The survival area of the flap in the L-arginine-treated group was significantly enlarged (63.83±5.13)%( P <0.01) in seven days postoperatively, compared with the control group (43.26±2.86)%. The NO concentration in the tissue was no statistic difference between all of the groups immediately after the operation ( P> 0.05). But, the NO concentration in the control was decreasing at the beginning and then increasing slightly to reach the high level in 12 hours after the operation. It was thereafter slumped down to the baseline in 72 hours after the surgery. Although the changes in the L-arginine-treated group were quite similar to the control excepting of the extent, the NO concentration was kept in a higher level in the sequential time after the operation ( P<0.01,P<0.01,P<0.05 and P< 0.01). Conclusions The NO concentration in skin flap tissue after the elevation was going up slightly for a short time. The exogenous L-arginine could promote the NO concentration in the random pattern skin flap to protect it from ischemic injury.更多还原