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An anti-reflux drainage device includes an elongated member defining a lumen, and a valve disposed along the elongated member. The valve can include one or more lumens in fluid connection with the lumen of the elongated member, a socket, a shaft disposed in the socket, and a stopper connected to the

An anti-reflux drainage device includes an elongated member defining a lumen, and a valve disposed along the elongated member. The valve can include one or more lumens in fluid connection with the lumen of the elongated member, a socket, a shaft disposed in the socket, and a stopper connected to the shaft that occludes the second lumen when exposed to retrograde pressure. Another such device includes an elongated member and a ball valve. The ball valve can include a seat and a shoulder defined by the elongated member, and a ball disposed in the elongated member between the seat and shoulder that occludes lumen when exposed to retrograde pressure.

대표청구항 ▼

What is claimed is: 1. A valve for preventing reflux of fluids in a ureteral stent comprising: a tube having a first end, a second end, and a socket disposed at the second end, the tube defining a length extending along a central axis from the first end of the tube to the second end of the tube, th

What is claimed is: 1. A valve for preventing reflux of fluids in a ureteral stent comprising: a tube having a first end, a second end, and a socket disposed at the second end, the tube defining a length extending along a central axis from the first end of the tube to the second end of the tube, the tube defining a lumen extending from the first end of the tube to the second end of the tube, the lumen having a length substantially equal to the length defined by the tube; a shaft having a proximal end and a distal end, the distal end of the shaft being disposed in the socket; and a stopper attached to the proximal end of the shaft and movable between a first position in which the stopper does not occlude the lumen and a second position in which the stopper occludes the lumen, the stopper moving from the first position to the second position in response to retrograde pressure in a bladder of a patient, the stopper having a lip configured to bias the stopper in the first position. 2. The valve of claim 1, wherein the stopper includes a deformable film. 3. The valve of claim 1, wherein the lumen is a first lumen, the tube further defining a second lumen, the first lumen and the second lumen being disposed about the periphery of the socket. 4. The valve of claim 1, wherein the socket defines a length substantially equal to the length defined by the tube. 5. The valve of claim 1, wherein the stopper is configured to retain at least a portion of the valve within the bladder of the patient when the stopper is in the first position. 6. The valve of claim 1, wherein the tube further comprises an outer surface and an inner surface, the stopper contacting the outer surface of the tube when in the second position. 7. The valve of claim 1, wherein the lip is made of shape memory material. 8. The valve of claim 1, wherein the lip is made of a resilient material. 9. The valve of claim 1, wherein the shaft is fixedly coupled to the socket such that the shaft has a position with respect to the socket when the stopper is in the first position, the shaft being in the position with respect to the socket when the stopper is in the second position. 10. The valve of claim 1, wherein the socket is fludically isolated from the lumen. 11. A valve for preventing reflux of fluids in a ureteral stent comprising: a tube having a first end, a second end, and a socket, the tube defining a length extending along a central axis from the first end of the tube to the second end of the tube, the tube defining a lumen extending from the first end of the tube to the second end of the tube, the lumen having a length substantially equal to the length defined by the tube, the socket being fludically isolated from the lumen; a shaft coupled to the socket, the shaft defining a proximal end and a distal end, the distal end of the shaft being disposed in the socket; and a stopper attached to the shaft having a first, undeformed configuration in which the stopper does not occlude the lumen and a second, deformed configuration in which the stopper occludes the lumen, the stopper deformable from the first configuration to the second configuration in response to retrograde pressure in a bladder of a patient. 12. The valve of claim 11, wherein the stopper includes a deformable film. 13. The valve of claim 11, wherein the lumen is a first lumen, the tube further defining a second lumen, the first lumen and the second lumen being disposed about the periphery of the socket. 14. The valve of claim 11, wherein the stopper has a distal surface with a periphery, the stopper includes a lip disposed about the periphery of the distal surface. 15. The valve of claim 11, wherein the socket defines a length substantially equal to the length defined by the tube. 16. The valve of claim 11, wherein an outer diameter of the stopper is greater than an outer diameter of the tube. 17. The valve of claim 11, wherein the tube further comprises an outer surface and an inner surface, the stopper contacting the outer surface of the tube when in the second position. 18. The valve of claim 11, wherein the shaft is fixedly coupled to the socket such that the shaft has a position with respect to the socket when the stopper is in the first position, the shaft being in the position with respect to the socket when the stopper is in the second position. 19. The valve of claim 11, wherein the stopper has a lip configured to bias the stopper in the first position. 20. A valve for preventing reflux of fluids in a ureteral stent comprising: a tube defining a lumen having a first end and a second end, the tube having an outer surface, an inner surface, and an outer diameter; a shaft defining a proximal end and a distal end, the distal end of the shaft being coupled to an inner wall of the tube; and a stopper coupled to the shaft and having a first configuration in which the stopper does not occlude the lumen and a second configuration in which the stopper occludes the lumen, the stopper having a diameter greater than the outer diameter of the tube, the diameter of the stopper being large enough to help retain at least a portion of the valve within the bladder of the patient when in the first configuration, the stopper configured to move from the first configuration to the second configuration in response to retrograde pressure in the bladder of the patient, the stopper contacting the outer surface of the tube while in the second configuration. 21. The valve of claim 20, wherein the stopper includes a deformable film. 22. The valve of claim 20, wherein the lumen is a first lumen, the inner wall of the tube defines a socket, the tube further defining a second lumen, the first lumen and the second lumen being disposed about the periphery of the socket. 23. The valve of claim 20, wherein the stopper has a distal surface with a periphery, the stopper includes a lip disposed about the periphery of the distal surface. 24. The valve of claim 20, wherein the shaft is fixedly coupled to the socket such that the shaft has a position with respect to the tube when the stopper is in the first configuration, the shaft being in the position with respect to the tube when the stopper is in the second configuration. 25. The valve of claim 20, wherein the stopper has a lip configured to bias the stopper in the first position.