Park, Chulmin Kim, Jeongryul Yonghwan, Moon Kim, Keri 2024-01-19T12:30:51Z 2024-01-19T12:30:51Z 2022-02-17 2022-04 1478-5951 https://pubs.kist.re.kr/handle/201004/115492 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. English WILEY A novel arthroscopic pre-curved cannula with both flexibility and high stiffness Article 10.1002/rcs.2360 1 INTERNATIONAL JOURNAL OF MEDICAL ROBOTICS AND COMPUTER ASSISTED SURGERY, v.18, no.2 INTERNATIONAL JOURNAL OF MEDICAL ROBOTICS AND COMPUTER ASSISTED SURGERY 18 2 N scie scopus 000741548900001 2-s2.0-85122692386 Surgery Surgery Article MECHANISM ROBOTICS cadaveric study high stiffness minimally invasive surgery pre-curved mechanism spring-wire mechanism variable stiffness