Transbronchial needle aspiration device

A - Human Necessities – 61 – B

Patent

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A61B 10/00 (2006.01)

Patent

CA 2527245

Transbronchial needle aspiration (TBNA) device. In one embodiment, the device comprises a handle(103) and a flexible catheter(107), the handle having a bore, the proximal end of the catheter being fixed within the handle bore. A protec tive tubular hub(111) having a flared distal end is press-fit coaxially within the distal end of the catheter, the distal end of the catheter being sealed around the distal end of the hub so as to define a distal opening. A hollow needle(109) having a sharp tip at its distal end is disposed within the cathe ter, the needle tip being sized for insertion through the distal opening of the catheter. The distal end of a flexible wire(105) is coupled to the proximal end of the needle, the proximal end of the wire extending through the handle bore and Transbronchial needle aspiration (TBNA) device. In one embodiment, the device comprises a handle(103) and a flexible catheter(107), the handle having a bore, the proximal end of the catheter being fixed within the handle bore. A protec tive tubular hub(111) having a flared distal end is press-fit coaxially within the distal end of the catheter, the distal end of the catheter being sealed around the distal end of the hub so as to define a distal opening. A hollow needle(109) having a sharp tip at its distal end is disposed within the cathe ter, the needle tip being sized for insertion through the distal opening of the catheter. The distal end of a flexible wire(105) is coupled to the proximal end of the needle, the proximal end of the wire extending through the handle bore and coupled to a button slide(121) accessible through a slot in the handle. The button slide is movable between a distal position in which the needle tip ex tends through the distal opening of the catheter and a proximal position in which the needle tip is disposed within the hub. When in either its distal position or its proximal position, a pawl on the button slide releasably enga.

La présente invention concerne un dispositif d'aspiration d'aiguille transbronchique (TBNA). Dans un mode de réalisation de l'invention ce dispositif comprend un manche et un cathéter souple, ce manche possédant un alésage et une extrémité proximale de ce cathéter étant fixée à l'intérieur de cet alésage de manche. Un embout tubulaire de protection possédant une extrémité distale évasée est ajusté et pressé de manière coaxiale à l'intérieur de l'extrémité distale du cathéter, cette extrémité distale du cathéter étant scellée autour de l'extrémité distale de l'embout de façon à définir une ouverture distale. Une aiguille creuse possédant une pointe au niveau de son extrémité distale est placée à l'intérieur du cathéter, cette pointe d'aiguille étant dimensionnée de façon à être introduite à travers l'ouverture distale du cathéter. L'extrémité distale d'un fil souple est couplée à l'extrémité proximale de l'aiguille, l'extrémité proximale de ce fil s'étendant à travers l'alésage du manche et étant couplée à un bouton coulissant accessible à travers une fente découpée dans le manche. Ce bouton coulissant peut se déplacer entre une position distale dans laquelle la pointe de l'aiguille s'étend à travers l'ouverture distale du cathéter et une position proximale dans laquelle la pointe de l'aiguille est placée à l'intérieur de l'embout. Que ce bouton soit placé en position distale ou en position proximale, un cliquet sur ce bouton coulissant entre en contact amovible avec une encoche correspondante du manche de façon à verrouiller ce bouton coulissant en place.

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