Related Experiment Videos
Nonvisual laser lithotripsy aided by plasma spectral analysis: viability study and clinical application
T K Shah1, G M Watson, Z X Jiang
1Institute of Urology, London, United Kingdom.
The Journal of Urology
|June 1, 1993
Summary
Nonvisual laser lithotripsy uses plasma spectrum feedback for stone fragmentation without direct vision. This technique is reliable, safe, and offers a new option for urologists in specific clinical situations.
Area of Science:
- Urology
- Laser Medicine
- Biomedical Engineering
Background:
- Nonvisual laser lithotripsy aims to fragment calculi without direct endoscopic visualization.
- Existing methods rely on visual guidance, posing limitations in certain anatomical locations.
Purpose of the Study:
- To develop and evaluate a nonvisual laser lithotripsy technique using plasma feedback spectrum analysis.
- To identify and fragment urinary calculi by analyzing the retrograde transmitted plasma spectrum.
Main Methods:
- Utilized the laser delivery fiber for retrograde transmission of plasma spectrum.
- Employed an optical multichannel analyzer for real-time spectrum analysis.
- Conducted in vitro, ex vivo, and in vivo studies to assess technique efficacy and safety.
Main Results:
- Successfully identified and fragmented calculi in in vitro and ex vivo settings.
- Recorded and analyzed plasma spectra from ureteral stones in vivo, monitoring fragmentation.
- Identified challenges for clinical application.
Conclusions:
- Monitoring plasma emission feedback spectrum makes nonvisual laser lithotripsy reliable and safe.
- The technique can be a valuable adjunct to established endoscopic procedures for urologists.
- Potential for broader clinical applications exists with further development.