Comparative in vitro study of tissue welding using a 808 nm diode laser and a Ho:YAG laser.
Lasers Med Sci
; 16(4): 260-6, 2001.
Article
in En
| MEDLINE
| ID: mdl-11702631
ABSTRACT
In vitro porcine arteries and veins have been welded end-to-end using either a 808 nm diode laser combined with an indocyanine green enhanced albumin solder, or with a continuous-wave (cw) HoYAG laser without biological solder. The vascular stumps were approached to each other over a coronary dilatation catheter in order to obtain a precise alignment and good coaptation. Standard histology revealed for both welding techniques lateral tissue damage between 2 and 3 mm caused by laser-induced heat. Good solder attachment to the tissue was observed by the use of a scanning electron microscope. The vessels soldered with the 808 nm diode laser using albumin solder showed considerably higher tensile strength (1 N compared to 0.3 N) than vessels welded exclusively by HoYAG laser radiation. In contrast, leaking pressure (350 +/- 200 mmHg) and bursting pressure (457 +/- 200 mmHg) were found to be independent of the welding technique used. This study demonstrates that fast (total welding time about 2-5 min), stable and tight microvascular anastomosis can be achieved with the use of a dye-enhanced albumin laser soldering technique and an ancillary coronary dilatation catheter.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Saphenous Vein
/
Anastomosis, Surgical
/
Tibial Arteries
/
Laser Coagulation
Limits:
Animals
Language:
En
Journal:
Lasers Med Sci
Journal subject:
BIOTECNOLOGIA
/
RADIOLOGIA
Year:
2001
Document type:
Article
Affiliation country:
Switzerland