Mechanical pump for removal of fragmented matter and methods...

Details Mechanical pump for removal of fragmented matter and methods... Mechanical pump for removal of fragmented matter and methods...

A - Human Necessities

61

M

A61M 25/14 (2006.01) A61B 17/22 (2006.01) A61M 1/00 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2386158

Material transport catheters and method for their use rely on rotation of an impeller within a catheter body (12). The impeller (60) preferably comprises an inner tube (62) or shaft having a helical rotor (64) formed over an outer surface thereof. Optionally, in the case of a tubular shaft (62), a second helical rotor (66) may be provided within the shaft lumen (68) in order to induce flow in opposite or in the same direction as induced by the outer helical rotor. Catheters (112) may further comprise structures (126) near their distal ends for disrupting clot, and are preferably introduceable over guidewires (120) where the helical rotors (142) are rotated directly over the guidewire (120). The catheters (112) may include two or more impellers (140) or impellers having two or more rotors in order to provide for circulation of materials at a target site within a patient body lumen.

Les cathéters et les techniques utilisés pour le transport d'une matière font appel à une turbine tournant dans le corps de cathéter (12). Cette turbine (60) comprend de préférence un tube intérieur (62) ou un arbre sur la surface extérieure duquel est monté un rotor hélicoïdal (64). Dans le cas d'un arbre tubulaire (62), on peut éventuellement trouver dans la lumière (68) dudit arbre un second rotor hélicoïdal (66) qui engendre un flux soit dans le sens opposé à celui du rotor hélicoïdal extérieur, soit dans le même sens. Des plus, les cathéters (112) peuvent comporter prés de leur extrémités distales des structures (126) conçues pour disloquer des caillots, et sont de préférence est introduits sur des fils de guidage (120) sur lesquels tournent directement des rotors hélicoïdaux (142). Les cathéters (112) peuvent comporter deux turbines (140) ou plus, ou bien des turbines équipées de rotors pour faire circuler des matières sur un site cible à l'intérieur d'une lumière dans le corps du patient.

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