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The authors have developed an articulated medical instrument which assists with the movement of and maintenance of the position of such as a lung during surgery to assist providing improved viewability and providing the necessary space required to work efficiently and effectively. Conventionally holding such as, a lung in a given position is achieved by arranging gauze in an appropriate configuration with the aid of a simple shaft like surgical instrument, however for various reasons the gauze requires constant replacement and rearrangement resulting in significant surgical inefficiency. By using an articulated mechanism that mimics the functionality of fingers, we have developed a surgical device that inherently provides greater mechanical stability and does not require the use of gauze, thus enabling more efficient surgery. The prototyping process was assisted with the use of 3D-CAD to simulate static and dynamic conditions and a 3D-printer to confirm the concept and then a working prototype was created. In order to validate the dynamic functionality of this surgical instrument, it was tested on a porcine lung which closely approximates human lungs by a clinical doctor of thoracic surgery. The result was that the developed prototype articulated mechanism was able to stably move and hold the lung in position during surgery thus confirming the dynamic efficacy of the mechanism.

Development of a finger like multi-joint articulated surgical retractor for use in endoscopic surgery