The key of the nursing procedure might be keeping effective vacuum aspiration, and the mental nursing and functions exercise guidance should be done well at the same time.

结论：负压封闭引流技术治疗四肢开放性损伤是一种简单、有效的治疗方法，保持有效的负压引流是护理的关键，同时还应做好心理和功能锻炼指导等护理工作。

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Low pit aspiration ratio and cracks of some bordered pits are the main reasons for increasing liquid impregnation after radio-frequency vacuum drying treatment.

具缘纹孔的闭塞率较低以及部分具缘纹孔周缘破裂是高频真空干燥后木材浸注性提高的主要原因。

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A needle aspiration biopsy device (20) includes a syringe (28), a valve coupler (25) for controlling a vacuum in the syringe barrel (30), and an anti-reflux head.

一种针抽吸活组织检查设备(20)，包括注射器(28)、控制注射器筒(30)内真空的阀门连接器(25)以及防回流头部。

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