一种新型的关节镜预弯套管，具有柔韧性和高刚性。
A novel arthroscopic pre-curved cannula with both flexibility and high stiffness.
机构信息
Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, Republic of Korea.
Robotics & Media Institute, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea.
出版信息
Int J Med Robot. 2022 Apr;18(2):e2360. doi: 10.1002/rcs.2360. Epub 2022 Jan 12.
BACKGROUND
Curved surgical instruments are being developed to expand the workspace of straight surgical instruments. They are required to have a small diameter and high stiffness.
METHODS
We developed a double-spring pre-curved cannula (DSPC) for electrocauterization, which has curved movements controlled solely by translational motion, and high stiffness via wire tension. It comprises a straight extension spring, pre-curved flat spring and braided high-modulus polyethylene line. A handheld device was designed for intuitive DSPC manipulation. The cannula has a 3.9 mm diameter and serves as a protective tube such that the electrode can safely reach the lesion.
RESULTS
Experimental results demonstrate that the DSPC has ideal curvature and maximum stiffness of 1.38 N/mm. In a cadaveric study, the DSPC reached the inferior glenohumeral ligament, which conventional surgical instruments cannot access, and surgeons successfully performed electrocauterization.
CONCLUSIONS
The designed DSPC is effective for future use in forceps, curettes and surgical robots.
背景
为了扩展直式手术器械的工作空间，人们正在开发弯式手术器械。这些器械需要具备小直径和高刚性的特点。
方法
我们开发了一种用于电灼的双弹簧预弯套管（DSPC），其弯曲运动仅通过平移运动控制，并且通过线张力实现高刚性。它由直式拉伸弹簧、预弯扁弹簧和编织超高模量聚乙烯线组成。为了直观地操作 DSPC，我们设计了一种手动装置。该套管直径为 3.9 毫米，可以作为保护管，使电极能够安全地到达病变部位。
结果
实验结果表明，DSPC 具有理想的曲率和最大 1.38 N/mm 的刚性。在尸体研究中，DSPC 到达了传统手术器械无法到达的下盂肱韧带，并且外科医生成功地进行了电灼。
结论
设计的 DSPC 将来可有效用于钳子、刮匙和手术机器人。
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