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为探索阻隔式皮瓣的血供机制并确定其转位的时机和标准，选用版纳微型猪５只，采用左、右侧自身对照，经阻隔迟延术第３，７，１０及２０天，转位术后第３，７，１０天进行大体观察、超声多普勒、皮瓣表面皮肤温度测定及组织学检查。结果发现，实验组转位后皮瓣均成活；对照组皮瓣转位后有３０％～５０％坏死。阻隔迟延术后第７天开始用超声多普勒仪对实验组及对照组皮瓣进行监测，发现阻隔式皮瓣经阻隔迟延术后第７天就可在蒂部听到动脉血流回声，并随着时间推移由皮瓣蒂部向远端扩展，达整个皮瓣长度的１／２时，即可行皮瓣转位；对照组无动脉血流回声。对照组皮瓣和实验组皮瓣术前皮温测定，两组间无差异（Ｐ＞０．０５），而阻隔迟延术及转位术后两组皮瓣皮温测定值均有非常显著差异（Ｐ＜０．０１）。证明，超声多谱勒探查的指标可作为阻隔式皮瓣血供和皮瓣转移时机一个科学、客观的方法和标准，且重复性好，无创的优点。
In order to explore the blood supply mechanism of the barrier flap and to determine the timing and criteria of its transposition, five miniature Minarets were selected. Left and right self-control were adopted. After the delayed obstruction was performed on days 3, 7, 10 and 20, The gross observation, Doppler ultrasound, skin temperature measurement and histological examination on the 3rd, 7th and 10th postoperative days were performed. The results showed that the experimental group transplanted flap alive; control group flap after transposition of 30% to 50% necrosis. Blockage delay 7 days after the start of the use of ultrasound Doppler on the experimental group and the control group flaps were monitored and found that the barrier flap delayed by the block on the 7th day after the pedicle to hear the arterial blood flow echo, And with the passage of time from the pedicle pedicle to the distal expansion of the entire flap length of 1/2, the flap transposition can be feasible; control group without arterial blood flow echo. There was no significant difference between the two groups (P> 0.05), but there was a significant difference between the two groups (P <0.01). Prove that the index of ultrasound Doppler exploration can be used as a barrier-type flap blood supply and flap transfer timing a scientific and objective method and standard, and good repeatability, non-invasive advantages.