[Is the argon laser suitable for angioplasty procedures?].
Laser angioplasty is a perspective method for the treatment of complications of atherosclerosis of peripheral and coronary arteries. The present study deals with the effects of an argon laser on cadaverous coronary arteries with atherosclerotic plaques. Radiation of the argon laser created in the plaque a circular defect with a singed margin. The energy of radiation being equal, the size of the defect depended on the position of the optic fibre -- it was greatest when the optic fibre was in contact with the plaque. The defect thus formed had uneven margins with adjacent layers of thermal damage which were larger in calcified plaques than in fibrous and fibrolipomatous plaques. Penetration of radiation into the plaque depended on its composition -- being least in calcified plaques. When the arteries were rinsed with saline during irradiation, the effect of radiation on the tissue was reduced as the tissue was cooled. The argon laser causes greater thermal damage of the arteries than pulsed lasers and therefore its clinical application will be restricted.
Stanĕk
F
F
II. interní klinika Lékarské fakulty Univerzity Karlovy, Praha.
Kvasnicka
J
J
Boudík
F
F
Vítková
I
I
Polecha
J
J
Kubátová
J
J
D016342:Angioplasty, Laser / Q000009:adverse effects; D003324:Coronary Artery Disease / Q000473:pathology / Q000601:surgery; D003331:Coronary Vessels / Q000473:pathology / Q000601:surgery; D006801:Humans; D066298:In Vitro Techniques
Je argonový laser vhodný k angioplastickým výkonům?