Catheter for detaching abnormal deposits in human blood vessels

Details Catheter for detaching abnormal deposits in human blood vessels Catheter for detaching abnormal deposits in human blood vessels

A - Human Necessities

61

B

A61B 17/22 (2006.01) A61B 17/00 (2006.01)

Patent

CA 2213571

The invention concerns a catheter (12) which is connected to a rotary drive (20) and has at its front end (12a) a cutting tool comprising a stator (14) and rotor (16). Peripheral blades of the rotor (16) and stator (14) co-operate in scissors-like manner. The detached deposits are conveyed through a tubular casing (22), via a discharge chamber (18), into a collection container (28). The conveying device is a drive shaft which takes the form of a feed screw, is disposed inside the tubular casing (22) and connects the rotary drive (20) to the rotor (16). A rotary catheter of this type is used for gentling removing and discharging thrombi and stenoses in narrowed blood vessels such as arteries and veins.

L'invention concerne un cathéter (12) relié à un système d'entraînement en rotation (20), dont l'extrémité avant (12a) est pourvue d'un outil tranchant comprenant un stator (14) et un rotor (16). Des lames montées sur la face périphérique du rotor (16) et du stator (14) coopèrent à la manière de ciseaux. Les dépôts détachés sont acheminés à travers un manchon tubulaire (22) jusqu'à un récipient collecteur (28), en passant par une chambre d'évacuation (18). L'acheminement est assuré par un arbre d'entraînement se présentant sous forme de vis sans fin, placée dans le manchon tubulaire (22), qui relie le système d'entraînement en rotation (20) au rotor (16). Un cathéter rotatif de ce type sert à éliminer des thromboses et des sténoses situées dans des vaisseaux sanguins rétrécis, tels que des artères et des veines, sans endommager ces derniers.

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