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Transurethral stone extraction with a vibrating basket catheter
Scandinavian Journal of Urology and Nephrology
|January 1, 1977
Summary
Mechanical vibration aids ureteral stone removal using a modified extractor. This technique proved safe and effective in canine studies and a pilot patient trial, facilitating stone extraction with no observed complications.
Area of Science:
- Urology
- Biomedical Engineering
Background:
- Ureteral stones pose a significant clinical challenge.
- Current stone extraction methods can be invasive and may have complications.
Purpose of the Study:
- To evaluate the efficacy and safety of a novel mechanical vibration technique for ureteral stone extraction.
- To assess potential ureteral injuries associated with the vibration procedure.
Main Methods:
- An in vitro study demonstrated vibration's ability to facilitate stone passage and extraction.
- A device was developed to transmit mechanical vibration to a modified stone extractor basket (2-4 mm amplitude, 40-60 Hz frequency).
- Canine studies involved bilateral ureteral catheterization with vibrated and non-vibrated control sides, followed by urography and histological examination.
Main Results:
- In vitro results showed improved passage and extraction of artificial ureteral stones.
- Canine studies revealed no ureteral injuries attributable to the vibration procedure.
- A pilot study in 14 patients successfully extracted stones in 9 cases; 3 passed stones spontaneously, and 2 required ureterolithotomy, with no complications.
Conclusions:
- Mechanical vibration is a safe and effective adjunct for ureteral stone extraction.
- The developed vibration technique shows promise for clinical application in managing distal ureteral stones.