Effects of different tissue loads on high power ultrasonic surgery scalpel

Ultrasound in Medicine & Biology
Chen YingZhang Ganghua

Abstract

The objective of this study is to investigate the influence of various tissue loads on the working characteristic of the ultrasonic scalpel, including working frequency, input admittance and reflection factor. Ex vivo animal experiments are carried out and relevant discussions of experimental results are provided. Admittance measurement results show that different tissue loads have different effects on a scalpel's working ability. Soft tissue makes the working frequency decrease and bone tissue makes it increase. Radius of admittance circles and reflection factor are also different. Equivalent circuit model is found and with a least-square parameter identification method, input admittance of ultrasonic scalpel with different tissue loads is solved. Results show that admittance circle radius is determined by the value of R1. Changes in L1 and C1 contribute to the shift of working frequency. This study will help decrease the sensitivity of ultrasonic scalpel to loads and greatly increase surgery efficiency.

References

Jun 1, 1996·Ultrasonics·L J Bond, W W Cimino
Jun 1, 1997·IEEE Transactions on Bio-medical Engineering·D SunW Z Shen
Sep 3, 1998·European Journal of Cardio-thoracic Surgery : Official Journal of the European Association for Cardio-thoracic Surgery·T IsomuraT Horii

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Citations

Jul 12, 2013·British Journal of Neurosurgery·Rafid Al-MahfoudhTim Pigott
Nov 13, 2015·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Yang KuangZhihong Huang

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