Catheter valves
The invention is directed to methods and devices to facilitate positioning of a catheter into a vessel and selectively controlling flow of fluids through the catheter until desired using one or more valves.
1. A catheter assembly for use with a luer device, the catheter assembly comprising:
a catheter hub having an interior cavity extending between a proximal end and a distal end;
an actuating body slidably located within the interior cavity of the catheter hub and having an actuating body lumen extending therethrough, the actuating body including a shoulder surface;
a valve located within the interior cavity, the valve comprising:
a base having a flange extending around a perimeter of the valve,
a valve lumen extending axially through the base,
a valve wall extending axially in a distal direction from the base, where the valve wall surrounds the valve lumen at a distal portion of the valve, the valve wall being biased in a closed configuration such that an adjacent interior surface of the valve wall contacts to block flow through the valve lumen and prevent fluid backflow in a proximal direction through the valve lumen, wherein the adjacent interior surface of the valve wall are separable to assume an open configuration that allows fluid flow in a distal direction through the valve lumen;
a plurality of leg extensions extending proximally from the base, the plurality of leg extensions being elastically compressible;
where in the closed configuration at least a distal portion of the actuating body is positioned within the valve such that the actuating body lumen is in fluid communication with the valve lumen, and where the shoulder surface of the actuating body is adjacent to the plurality of leg extensions;
wherein insertion of the luer device into the interior cavity of the catheter hub causes advancement of the actuating body in a distal direction compressing the plurality of leg extensions while moving the valve to the open configuration by causing separation of the adjacent interior surface of the valve wall; and
wherein upon withdrawal of the luer device, the plurality of leg extensions elastically revert causing movement of the actuating body in a proximal direction such that the valve reverts to the closed configuration.
2. The catheter assembly of claim 1 , where each leg extension of the plurality of leg extensions are spaced from an adjacent leg extension by a gap.
3. The catheter assembly of claim 1 , where a distal portion of the actuating body comprises a tubular shape having a diameter less than a diameter of the shoulder surface.
4. The catheter assembly of claim 1 , where the valve comprises a single slit opening at a distal end of the valve.
5. The catheter assembly of claim 1 , where the valve comprises a tri-slit opening at a distal end of the valve.
6. The catheter assembly of claim 1 , where the actuating body comprises a plurality of alignment features to prevent rotation of the actuating body within the catheter hub.
7. The catheter assembly of claim 1 , where the flange of the base is positioned within a groove in the interior cavity of the catheter hub to prevent fluid flow around the valve.
8. The catheter assembly of claim 1 , where the catheter hub comprises a distal portion and a proximal portion, where the distal portion of the catheter hub and the proximal portion of the catheter hub are joined together such that the flange of the base of the valve is located between an intersection of the distal portion of the catheter hub and the proximal portion of the catheter hub to prevent fluid flow around the valve.
9. The catheter assembly of claim 1 , the plurality of leg extensions is distributed circumferentially positioned about the base of the valve.
10. The catheter assembly of claim 1 , where the valve further comprises a tubular extension extending distally from the base of the valve, the tubular extension radially surrounding the valve wall, at least one flexible rib connecting an interior of the tubular extension to an exterior of the valve wall such that the at least one flexible rib prevents prolapse of the valve wall upon proximal movement of the actuating body.
11. The catheter assembly of claim 1 , where the valve wall forms a single flap valve configuration.
12. The catheter assembly of claim 1 , where the valve wall forms a multiple flap valve configuration.