| 摘要 |
<p>A catheter assembly, with active fluid control valve, includes a catheter (21) having a cylindrical side wall (22) describing a lumen (23) therethrough, a proximal end (25) and a closed distal end (27). The catheter (21) includes a slit (29) through the side wall (22) positioned adjacent to the distal end (27). This slit (29) is angularly oriented with respect to the longitudinal axis of the catheter (21) and is defined by two opposed faces (32,33) formed in the side wall (22). The catheter housing (34) includes a conduit (35) therethrough wherein the proximal end (25) of the catheter (21) is connected to the housing (34) so that the conduit (35) and the lumen (23) are in fluid communication. The stylet (39) is positioned within the lumen (23) having a first end (40) connected to the closed distal end (27) and a second end (41). A valve control knob (44) having a passageway (45) therethrough is rotatably connected to the housing (34) so that the passageway (45) and the conduit (35) are in fluid communication. Engagement structure is provided in the knob (44) for engaging the stylet (39) so that rotation of the knob (44) relative to the housing (34) causes rotation of the stylet (39) which in turn causes rotation of the closed distal end (27) of the catheter (21) causing the opposed faces (32,33) of the slit (29) to separate forming an opening for allowing fluid communication between the lumen (23) and the exterior of the catheter (21).</p> |
