Methods 102 cases were cut into two groups. Patients in experiment group were treated by fistulation with rubber tissue, and other patients in controlled group were treated by classical fistulation.

方法102例患者，分为2组：引流条造瘘组以橡皮引流条贯穿于囊肿或脓肿壁两造口之间建立人工瘘道；

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Cryogenic liquids and their vapors can rapidly freeze human tissue and can cause many common materials such as carbon steel, rubber, and plastics to become brittle or even break under stress.

低温液体和它们的蒸气能够迅速冷冻人体组织，而且能导致许多常用材料，如碳素钢、橡胶和塑料变脆或者甚至在压力下破裂。

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