Patent ID: 6905505

Claim:
An intravascular system for treating a living being via the being's vascular system, said intravascular system comprising a catheter, an instrument having a working head, debris extraction means, an infusate liquid and at least one material to be carried by said infusate liquid into the being's vascular system, said catheter comprising a distal end portion, said instrument being arranged to be extended through said catheter to form a passageway therebetween, said working head of said instrument being arranged to be located in a portion of a vessel to operate therein, whereupon some debris may be produced by the operation of said working head, said debris extraction means being arranged for introducing said infusate liquid and said at least one material into the being's vascular system and creating a differential flow in said lumen, whereupon any debris produced by the operation of said working head is withdrawn by said differential flow through said passageway for collection remote from the vessel portion and is prevented from flowing into any upstream vessel or downstream vessel.