A high pressure zone was formed at the site of anastomosis in short term after operation, which can be prevented from gastric positive pressure transiting to esophageal lumen.
手术后近期吻合口处有一高压带，可起到阻止胃腔正压向食管腔传递的压力屏障作用。
It is shown that the "damping" effect mainly exists in the zone of 0.5d from the impingement wall, and there are positive as well as adverse pressure gradient in the radial direction.
表明壁面的“阻尼”影响主要集中在近壁面0 . 5 D以内，在径向上流动既有顺压梯度，又有逆压梯度。
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