| 主权项 |
1. A combination of a two-way medical valve and an inflation tube, comprising:
an elastomeric slit valve having a valve body defining proximal and distal ends, and an opening at the proximal end, an internal chamber including a first chamber immediately adjacent and wider than the opening and a second chamber in open fluid communication with the first chamber, wherein the internal chamber in the valve body narrows between the first and second chambers to form a neck, and a normally closed slit formed in a solid portion of the valve body connecting a concave section at a distal end of the second chamber and the distal end of the valve body; and an inflation tube having a lumen therethrough, the inflation tube defining an injection tip having a wedge shaped distal end, the injection tip further including an insertion stop located proximal to the distal end and a reduced diameter portion therebetween; wherein the elastomeric valve body is adapted to receive the inflation tube such that fluid may be introduced into the internal chamber and at a threshold pressure differential across the slit to open and pass distally through the slit, and wherein the slit also permits fluid to pass proximally therethrough upon a predetermined backflow pressure differential, and wherein the insertion stop is sized to positively engage the opening and limit the distance to which the injection tip extends into the internal chamber, at which distance the wedge shaped distal end forms a seal within the narrow neck in the valve body. |
