Development of invitro blood vessel coagulation-incision experimental method and characterization of opposite-phase vibration type ultrasonic scalpel

Abstract

The ultrasonic scalpel used in the operation can perform coagulation hemostasis and tissue incision in the affected area. For coagulation, thermal denaturation must be completed before incision. Improvement of coagulation performance is required to shorten the operation time. The ultrasonic scalpels used were opposite-phase vibration modes with scissors like ultrasonic vibration modes proposed by our research group. Since the opposite-phase vibration vibrates in a direction vertical to an axis in addition to the longitudinal vibration of a normal ultrasonic scalpel, it is expected to improve coagulation performance due to heat generation by rubbing while pressing. In this research, a method for evaluating the coagulation performance of blood vessels that had been coagulated and incised with an ultrasonic scalpel was investigated. As a result, stress-strain curve results were obtained by using the experimental methods examined, and the strength of coagulation could be evaluated. In addition, characteristics of scalpel were evaluated by comparison of coagulation performance under different incision conditions.

Keywords

• ultrasonic scalpel
• characterization
• coagulation
• heat generation
• medical device