Baddoo H, Djagbletey R, Owoo C
Department of Anaesthesia, Korle-Bu Teaching Hospital, Korle-Bu, Accra.
Ghana Med J. 2014 Mar;48(1):47-9. doi: 10.4314/gmj.v48i1.8.
The use of ultrasound in anaesthetic practice continues to be more established and the use of ultrasound guidance in establishing vascular access is recommended by various groups. We have developed a tissue model for the practice and skills development in ultrasound vascular access.
The tissue model consist of a piece of "pork belly", a longitudinal shaped balloon inserted between two muscle layers at a chosen depth of the tissue model (mimics a blood vessel), a bag of intravenous fluid (e.g. Ringer's Lactate) together with a giving set and a short piece of extension tubing connected to a three-way tap used to expel air from the system. One end of the balloon is tied to the giving set with the intravenous fluid. The other end is tied to the short tubing with the three-way tap.
Ultrasound images of the fluid filled balloon mimic a blood vessel. It is possible under ultrasound guidance to puncture the balloon several times (>10times) and still be able to distend the balloon with fluid.
Ultrasound guided techniques require practice to improve hand-eye coordination. The "pork belly" tissue model allows multiple needle puncture without losing its functional integrity.
We believe the "pork belly" tissue model adds to the range of models that can be used to practice ultrasound guided vascular access. The components required for this model are readily available locally and affordable.
超声在麻醉实践中的应用日益成熟，多个组织推荐在建立血管通路时使用超声引导。我们开发了一种用于超声引导血管通路实践和技能培养的组织模型。
该组织模型由一块“猪肚”、一个纵向放置的球囊组成，球囊插入组织模型选定深度的两层肌肉之间（模拟血管）、一袋静脉输液（如乳酸林格氏液）以及一套输液器和一段连接三通阀的短延长管，用于排出系统中的空气。球囊的一端与装有静脉输液的输液器相连，另一端与带有三通阀的短管相连。
充满液体的球囊的超声图像模拟血管。在超声引导下可以多次（>10次）穿刺球囊，并且仍能够用液体使球囊膨胀。
超声引导技术需要通过练习来改善手眼协调能力。“猪肚”组织模型允许多次针刺而不丧失其功能完整性。
我们认为“猪肚”组织模型增加了可用于练习超声引导血管通路的模型种类。该模型所需的组件在当地很容易获得且价格低廉。
