Related Experiment Videos
Large laser sheaths for pacing and defibrillator lead removal
C Reiser1, K D Taylor, R A Lippincott
1Spectranetics Corporation, Colorado Springs, Colorado 80907, USA.
Lasers in Surgery and Medicine
|January 27, 1998
Summary
New 14-F and 16-F laser sheaths demonstrate effective cutting ability for explanting larger pacing leads. These devices offer comparable cutting rates to the 12-F sheath, ensuring procedural efficiency.
Area of Science:
- Cardiovascular Interventions
- Medical Device Technology
Background:
- The 12-F laser sheath has proven successful for explanting smaller pacing leads (under 7.5-F).
- Larger leads necessitate advanced explantation tools, leading to the development of 14-F and 16-F laser sheaths.
Purpose of the Study:
- To evaluate and compare the cutting efficacy of the new 14-F and 16-F laser sheaths against the established 12-F device.
- To determine the cutting performance of larger diameter laser sheaths for pacing lead extraction.
Main Methods:
- Fresh porcine aorta was used to test three laser sheath sizes (12-F, 14-F, 16-F).
- Pulsed ultraviolet laser (308-nm XeCl excimer) was applied, measuring device advancement rates.
- Key variables included laser fluence, pulse repetition rate, and applied pressure.
Main Results:
- All tested laser sheath sizes achieved cutting rates of 9-13 microns per pulse under specific conditions (60 mJ/mm2, 40 Hz, 1.4 kg/cm2).
- Increasing laser fluence, repetition rate, or applied pressure enhanced device advancement per laser shot.
Conclusions:
- The 14-F and 16-F laser sheaths exhibit effective cutting capabilities comparable to the 12-F sheath.
- Optimal cutting speed is achieved by maximizing laser repetition rate and fluence, with only a marginal increase in force required for larger sheaths.