A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 17/3207 (2006.01)
Patent
CA 2648819
A rotational atherectomy device for removing a stenotic tissue (330, 360) from a vessel (300) of a patient comprises a flexible hollow drive shaft (2) and an abrasive element (101, 102) mounted to the drive shaft proximal to and spaced from a solid support element (10, 10s) mounted at the distal end (6) of the drive shaft, the solid support element having a rounded outer surface and an outflow channel (20, 20s) with an outflow opening in said rounded outer surface. The drive shaft comprises a torque transmitting coil (4) and at least one fluid impermeable membrane (3) forming a fluid impermeable lumen for the antegrade flow (FF) of fluid into the outflow channel such that, during rotation of the drive shaft, a flow of fluid out of said outflow opening forms a fluid bearing between the rotating solid support element and the wall of the treated vessel.
L'invention concerne un dispositif d'arhérectomie rotatif destiné à retirer un tissu sténosé (330, 360) d'un vaisseau (300) d'un patient. Le dispositif comprend un arbre de transmission (2) creux, souple et un élément abrasif (101, 102) fixé à l'arbre de transmission à une proximité espacée d'un élément de support solide (10, 10s) fixé à l'extrémité distale (6) de l'arbre de transmission, ledit élément de support solide présentant une surface extérieure arrondie et un canal d'évacuation (20, 20s) muni d'une ouverture d'évacuation ménagée dans ladite surface extérieure arrondie. L'arbre de transmission comprend une bobine de transfert de couple (4) et au moins une membrane imperméable aux liquides (3) formant une lumière imperméable aux liquides pour l'écoulement antérograde (FF) du liquide à l'intérieur du canal d'évacuation si bien que, pendant la rotation de l'arbre de transmission, un débit du liquide s'écoulant hors de ladite ouverture d'évacuation forme un palier fluide entre l'élément de support solide rotatif et la paroi du vaisseau traité.
Shturman Leonid
Shturman Leonid
Stikeman Elliott Llp
LandOfFree
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