外科手术种类繁多,手术的范围和复杂程度也各不相同。如何使手术野暴露清楚,便于手术操作,减轻术者劳动强度,手术牵开器是必不可少的器械之一。目前使用的牵开器一般多是手持式,在术中由于牵力过度,常出现滑脱,并对组织有一定的损伤;若手术持续时间较久,术者和助手易疲劳以致不能充分暴露术野,给手术带来不便;其优点是可以随手术的需要灵活地改变位置、方向和力量。目前还有一种腹 A wide range of surgical procedures, the scope and complexity of the surgery are also different. How to expose the surgical field clearly, facilitate surgical operation, reduce the labor intensity of the surgeon, surgical retractor is one of the essential instruments. The current use of retractors are mostly hand-held, during surgery because of over-force, often appear slippage, and the organization has some damage; if the operation lasts longer, the surgeon and assistant fatigue so that they can not be fully exposed Wild, inconvenient to surgery; its advantage is that you can flexibly change position, direction and strength as your operation needs. There is still a kind of belly