Development of ultrasonic device for percutaneous epidural lysis of adhesions

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K01340
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Medical systems
• Research Institution: Tokyo University of Technology
• Principal Investigator: NAEMURA Kiyoshi 東京工科大学, 医療保健学部, 准教授 (90302752)
• Co-Investigator(Kenkyū-buntansha): 森田 剛 東京大学, 大学院新領域創成科学研究科, 准教授 (60344735)
• Co-Investigator(Renkei-kenkyūsha): MURAMATSU Hiroshi 東京工科大学, 応用生物学部, 教授 (20373045)
• Research Collaborator: SAWASHIMA Moeka 東京工科大学, 応用生物学部 ; YOKOZAWA Hiroki 東京大学, 大学院新領域創成科学研究科
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 超音波振動子 / Raczカテーテル / ペインクリニック / 穿刺反力 / 温度分布

Outline of Final Research Achievements

Epidural adhesions cause chronic pain. To rescue from pain, percutaneous epidural lysis of adhesions with Racz catheter has conducted in recent years. Rigid adhesions cannot resolve only by injection of hyaluronidase through the Racz catheter. In order to develop a new methodology, current research is a feasibility study for adding ultrasonic vibration to the tip of the Racz catheter. Racz catheter cut from the tip was fixed to the Langevin-type ultrasonic vibrator as a prototype. A styrene foam block was employed as specimen of substitute for adhesion. The prototype fixed with a load cell were moved linearly against the specimen. Temperature near the insertion point was measured by a thermography. As results, insertion force decreased up to 40% owing to the ultrasonic vibration, while temperature increased only 2 degrees Celsius.

Free Research Field

医用システム