[Attempt at in vitro decalcification of aortic valves using various types of lasers].
The effects of three types of laser were studied in vitro on calcified aortic valves removed in the course of valve replacement. These were: 1) argon laser; 2) Nd-YAG laser with a long (1 ms) impulse, and 3) Nd-YAG laser with a short (10 ns) impulse. With the first two types of laser, lesions of carbonization and fragments detached from the areas treated were observed. With the 10 ns ND-YAG laser, a mean energy of 100 mj per shot excavated the calcified valves by drilling holes that were 0.5 to 1.5 mm in diameter and had clear-cut non carbonized borders. No residue was found during the procedure: the substance was simply vaporized. The splitting of several calcareous nodules on a valve made it more pliable. If it were possible to transfer this high peak energy onto a flexible optic fibre, the aortic valves could be decalcified by interventional catheterization.
Petit
A
A
Centre de cardiologie, hôpital du Bocage, Dijon.
Millot
G
G
Berger
H
H
David
M
M
Brenot
R
R
Louis
P
P
D002114:Calcinosis / Q000601:surgery*; D003648:Decalcification Technique; D006349:Heart Valve Diseases / Q000601:surgery*; D006801:Humans; D066298:In Vitro Techniques; D053685:Laser Therapy; D012107:Research Design
Tentative de décalcification de valves aortiques in vitro par différents types de lasers.