Thoracoscopic transmyocardial revascularization handpiece...

A - Human Necessities – 61 – B

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A61B 18/20 (2006.01) A61B 17/00 (2006.01) A61B 19/00 (2006.01)

Patent

CA 2207242

A thoracoscopic transmyocardial revascularization handpiece assembly (20) for a medical laser system (12) includes an elongate barrel (22) having a narrow width sized to fit between the ribs of a patient and having a first passage therethrough; an elongate handpiece (24) extending from the barrel (22) and having a similarly narrow width commensurate with the barrel (22) and having a second passage therethrough; and a contacting surface (32) on the distal end of the handpiece (24) for contacting the wall of the patient's heart; the contacting surface (32) having a width in a first dimension which is approximately that of the handpiece (24) and having a width in a second dimension which is larger than the cross-sectional area of the handpiece (24); an aperture in the contacting surface (32) communicating with the second passage for transmitting the laser beam (31); and focusing means (30) in the barrel (22) for focusing the laser beam (31) proximate to the aperture.

Un ensemble (20) pièce à main de revascularisation transmyocardique thoracoscopique pour système laser médical (12) comprend un cylindre allongé (22) présentant une largeur étroite dimensionnée pour passer entre les côtes d'un patient et présentant un premier passage; une pièce à main allongée (24) s'étendant à partir du cylindre (22) et présentant une largeur également étroite proportionnée à celle du cylindre (22) ainsi qu'un second passage; et une surface de contact (32) présentant une largeur dans une première dimension approximativement égale à celle de la pièce à main (24) et présentant une largeur, dans une seconde dimension, supérieure à la superficie de section de la pièce à main (24); une ouverture dans la surface de contact (32) communiquant avec le second passage destinée à la transmission du faisceau laser (31); et un moyen de focalisation (30) situé dans le cylindre (22) destiné à focaliser le faisceau laser (31) à proximité de l'ouverture.

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