一种应用于肺小结节术前定位的双腔同步注射器的设计

Design of a dual chamber synchronous syringe for preoperative localization of small pulmonary nodules

摘要:

目的 设计一种可用于肺小结节术前定位的双腔同步注射器。方法 双腔同步注射器由注射器内腔、注射器外腔以及双腔穿刺针组成，注射器内、外腔的推柄设计为环状卡槽状，双腔针体可分别连接注射器内、外腔，外针头前端设计有环状滤网。结果 注射器内、外腔推柄的环状卡槽设计可同时推注两种液体，双腔针体可分别导流两种液体，外针头前端的环状滤网设计，增加了液体的接触面积，使得磁流体和葡萄糖酸钙离开针头后立即充分接触，迅速形成磁凝胶。结论 成功设计出一种可同时推注两种液体的双腔同步注射器，适用于磁凝胶进行肺小结节的术前定位。

关键词:肺小结节;术前定位;双腔同步注射器;磁示踪技术

Abstract:

Objective To design a dual chamber synchronous syringe for preoperative localization of small pulmonary nodules.Methods The dual chamber synchronous syringe was composed of the inner and outer syringes and the double-cavity puncture needle. The handles of the inner and outer syringes were linked with an annular groove. The double-cavity needle body could be connected to the syringes respectively.Results The handle of the inner and outer syringes can push and inject two liquids simultaneously by the annular groove. The double-cavity needle body can drain two liquids respectively. The annular filter at the front of the outer needle increases the contact area of the liquids. The magnetic fluid and calcium gluconate contact sufficiently and form magnetic gel rapidly after leaving the needle.Conclusion The dual chamber synchronous syringe, which can inject two liquids at the same time, could be used as preoperative localization of small pulmonary nodules with the magnetic gel.

Key words:small pulmonary nodules;preoperative localization;dual chamber synchronous syringe;magnetic tracer technique