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Experimental comparative study on morphological effects of different lasers on the liver
Research in Experimental Medicine. Zeitschrift Fur Die Gesamte Experimentelle Medizin Einschliesslich Experimenteller Chirurgie
|January 1, 1982
Summary
Argon and Nd YAG lasers offer hemostasis in hepatic surgery for vessels under 4.5mm, with Nd YAG requiring higher power. CO2 lasers provide poor hemostasis but precise cutting.
Area of Science:
- Hepatobiliary Surgery
- Surgical Technology
- Laser Medicine
Background:
- Laser technology is increasingly explored for surgical applications.
- Hepatic surgery presents challenges in hemostasis and tissue ablation.
- Different laser types possess unique thermal and cutting properties.
Purpose of the Study:
- To compare the efficacy of argon, Nd YAG, and CO2 lasers in hepatic surgery.
- To evaluate hemostasis, cutting ability, and tissue damage induced by different lasers.
- To assess the potential of laser irradiation as an adjuvant in liver surgery.
Main Methods:
- Comparative study using 17 New Zealand rabbits.
- Surgical procedures included subtotal lobectomy and limited resection.
- Evaluation of hemostasis, cutting power, and lesion characteristics at various power outputs and vessel sizes.
- Histological and electron-microscopic examination of laser-induced lesions.
Main Results:
- Argon and Nd YAG lasers achieved hemostasis for vessels <4.5mm; Nd YAG required 4x higher power than argon.
- CO2 laser offered precise cutting but insufficient hemostasis for vessels >1mm.
- Nd YAG laser caused significant thermal diffusion and necrosis; argon produced superficial lesions.
- Electron microscopy showed cellular damage and mitochondrial disruption; Nd YAG led to more fibrosis.
Conclusions:
- Laser irradiation can serve as an adjuvant safety factor in hepatic surgery.
- Argon and Nd YAG lasers show promise for hemostasis in liver surgery.
- Nd YAG laser may be particularly useful for destroying liver metastases due to its thermal effects.