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A new contact probe for intraoperative laser ablation
H Ohtake1, G Watanabe, T Misaki
1Department of Surgery, Kanazawa University School of Medicine, Japan.
Pacing and Clinical Electrophysiology : PACE
|December 1, 1996
Summary
A novel laser probe improves intraoperative ablation accuracy by stabilizing target distance, angle, and media. This new method offers more precise tissue ablation compared to conventional techniques.
Area of Science:
- Biomedical Engineering
- Surgical Technology
- Laser Medicine
Background:
- Intraoperative laser ablation accuracy is challenged by factors like target distance, irradiation angle, and intervening media.
- Conventional noncontact laser ablation methods often employ external cooling, which can introduce variability.
Purpose of the Study:
- To develop and evaluate a novel laser probe designed to overcome limitations in intraoperative laser ablation accuracy.
- To compare the precision of the new laser probe against conventional noncontact irradiation methods.
Main Methods:
- A new laser probe featuring a hollow conical tube with a thin film tip was developed.
- Zero-degree centigrade saline was delivered through the probe for internal cooling and stabilization.
- Neodymium:yttrium aluminum garnet (Nd:YAG) lasers (50-200 J/mm2) were used to irradiate ventricles in beating canine hearts, comparing the new probe with noncontact irradiation.
Main Results:
- The mean volume of ablated tissue was comparable between the new probe and the conventional noncontact method.
- The new probe demonstrated a significantly smaller distribution of volume values, indicating greater consistency (P < 0.05).
Conclusions:
- The developed laser probe effectively resolves issues related to stabilizing target distance, irradiation angle, and media.
- This novel probe enables more accurate intraoperative laser ablation compared to conventional methods.