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Sutureless microvascular anastomosis using the THC:YAG laser: a preliminary report
L S Bass1, M R Treat, C Dzakonski
1Department of Surgery, Columbia University College of Physicians and Surgeons, New York, NY 10032.
Microsurgery
|January 1, 1989
Summary
A novel pulsed thulium-holmium-chromium: YAG (THC:YAG) laser effectively created patent laser anastomoses in rat carotid arteries. This laser surgery, utilizing silicone stents, demonstrated minimal thermal damage and rapid, reliable vessel fusion.
Area of Science:
- Biomedical Engineering
- Microsurgery
- Laser Medicine
Background:
- Vascular anastomosis is crucial in microsurgery.
- Traditional suturing methods can be time-consuming and prone to complications.
- Laser-assisted vascular anastomosis offers a potential alternative.
Purpose of the Study:
- To evaluate the efficacy and safety of a new pulsed thulium-holmium-chromium: YAG (THC:YAG) laser for carotid artery anastomosis in rats.
- To assess the need for sutures when using solid silicone stents with laser anastomosis.
- To compare the THC:YAG laser's characteristics with other lasers used in vascular surgery.
Main Methods:
- Rat carotid artery laser anastomosis was performed using a pulsed THC:YAG laser (2.15 microns).
- Solid silicone stents were used to coapt vessel edges, eliminating the need for stay sutures.
- Histological examination confirmed collagen fiber fusion and assessed thermal damage.
Main Results:
- 27 out of 30 laser anastomoses were patent, with 3 showing early weld separation.
- Mean anastomotic time was 4 minutes 48 seconds.
- Mean bursting pressure was 400 mm Hg, with no thrombosis observed.
Conclusions:
- The pulsed THC:YAG laser, combined with silicone stents, is a viable method for vascular anastomosis.
- This technique results in minimal thermal distortion and full-thickness media fusion.
- The laser's fiber optic deliverability enhances its utility in microsurgical settings.