| 摘要 |
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. |
