Design of a new stone extraction device with force feedback
by Zahra Najafi; Thomas Tieu; Ajay M. Mahajan; Bradley F. Schwartz
International Journal of Biomedical Engineering and Technology (IJBET), Vol. 20, No. 2, 2016

Abstract: Ureteroscopic stone extraction devices are effective and ubiquitous tools in the management of urolithiasis. Ureteroscopy, however, has the potential to cause injury to the ureter. Perforation, and on some occasions, avulsion of the ureter as a result of excessive forces on the extraction device are some serious complications of this practice. In this paper, we propose the integration of a force sensor with stone extraction devices. The proposed prototype provides instantaneous force measurements imposed on the ureter wall during the stone removal procedure, and thereby, aids in reducing the risk of ureteral perforations and avulsions by highlighting the safety and hazardous extraction forces. A prototype was built and a bench top test was performed. The results obtained from the bench top tests were consistent with the results reported in previous works in the literature.

Online publication date: Sat, 16-Jan-2016

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