Objective: To explore the post-operative change of blood flow and surface density of vascular network of the pure venous flap.

目的：观测纯静脉皮瓣术后血流量和血管网面密度变化。

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To introduce the use of trapezius myocutaneous flap to repair the refractory wound surface of head and neck.

介绍斜方肌肌皮瓣在修复头颈部难治性创面中的应用，提供头颈部复杂创面修复的方案。

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The top surface, as a flap or strip, of a box containing a commercial product, typically bearing identification and used to prove the date or fact of purchase.

装有商品的盒子的顶部表面部分，如盖口或长条。如带有识别标记并可用来以此证明购买的日期或事实。

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