Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
Date (from‐to) : 2017/04 -2020/03
Author : Nakanishi Ryoichi
We have developed a wide viewing trocar with reduced blind spots, which is a major cause of intraoperative complications. Initially, we planned to make a trocar using 6 small Charge Coupled Device (CCD) image sensors, but we made a trocar using 4 Complementary Metal-Oxide Semiconductor (CMOS) image sensors, which are cheaper than CCD sensors, due to lack of budget. Thereafter, we evaluated the function and operability of the trocar in a human cadaver model, and assessed whether 4 CMOS images could be actually drawn in a picture-in-picture format in an endoscopic image. Although we could obtain a visual field from 3 CMOS images without problem in terms of medical safety, we could not assess another CMOS image. The CMOS code in the endoscope insertion part became a problem to be improved in the future.