Flapper Valve with Membrane Bypass for Power PICC
A bypass for power injection includes (a) a housing defining a lumen extending from a proximal end to a distal end coupled to a catheter; (b) a membrane valve mounted within the lumen, the membrane valve having an opening extending therethrough sized to tightly receive therethrough and seal around a power injection device; and (c) a flapper valve extending across the lumen distally of the membrane valve. The flapper valve includes a flap biased toward a closed position in which the lumen is sealed. The flap is rotatable away from the closed position when contacted by a power injection device to permit the device to extend therethrough.
1 . A bypass for power injection, comprising:
a housing defining a lumen extending from a proximal end to a distal end coupled to a catheter;
a membrane valve mounted within the lumen, the membrane valve having an opening extending therethrough sized to tightly receive therethrough and seal around a power injection device; and
a flapper valve extending across the lumen distally of the membrane valve, the flapper valve including a flap biased toward a closed position in which the lumen is sealed, the flap being rotatable away from the closed position when contacted by a power injection device to permit the device to extend therethrough.
2 . The bypass according to claim 1 , wherein the flapper valve comprises a hinge pivotally coupling the flap to a mounting element coupling the flapper valve to the housing.
3 . The bypass according to claim 1 , wherein the flapper valve is formed as a check valve opening only toward the distal end of the housing.
4 . The bypass according to claim 1 , wherein the membrane valve substantially seals the lumen around a power injection device inserted therethrough.
5 . The bypass according to claim 1 , wherein the flapper valve is formed of a resilient material biasing the flap toward the closed position.
6 . The bypass according to claim 1 , wherein the flapper valve includes a biasing member biasing the flap toward the closed position.
7 . A catheter system comprising:
a flexible elongate body including a distal portion insertable to a desired position within a body and a proximal portion which, when the distal end is inserted to the desired position within the body, remains accessible outside the body, the proximal portion including a bypass channel and an infusion channel, lumens of the bypass and infusion channels extending from proximal openings to distal openings opening into a catheter lumen extending to the distal portion of the catheter;
a valve extending across the infusion channel and sealing the channel at all times when a fluid pressure in the infusion channel remains below a predetermined threshold level;
a membrane valve extending across the bypass channel, the membrane valve having an opening therethrough sized to tightly receive therein and seal around a power injection device; and
a flapper valve extending across the bypass channel distal of the membrane valve, the flapper valve including a flap biased toward a closed position sealing the bypass channel and openable by the power injection device.
8 . The valved catheter according to claim 7 , wherein the flapper valve includes a hinge pivotally connecting the flap to a peripheral portion of the flapper valve, the peripheral portion being coupled to the housing.
9 . The valved catheter according to claim 7 , wherein the distal opening of the bypass channel is distal of the distal opening of the infusion channel.
10 . The valved catheter according to claim 7 , wherein the flapper valve is formed as a check valve opening only toward the distal opening of the bypass channel.
11 . The valved catheter according to claim 7 , wherein the elongate body is a peripherally inserted central catheter.
12 . The bypass according to claim 7 , wherein the flapper valve is formed of a resilient material biasing the flap toward the closed position.
13 . The bypass according to claim 7 , wherein the flapper valve includes a biasing member biasing the flap toward the closed position.
14 . A method for transferring fluids to the vascular system, comprising:
transferring fluid through an infusion/withdrawal channel of a catheter at a first flow rate, the infusion/withdrawal channel including a pressure activated safety valve sealing the infusion/withdrawal channel at all times when a fluid pressure within the infusion/withdrawal channel is less than a predetermined threshold level;
inserting a power injection device into a bypass channel of the catheter, through a hole in a membrane valve to push open and pass through a flapper valve, the hole in the membrane being sized to tightly receive and seal around an outer surface of the power injection device; and
power injecting fluid into the catheter via the bypass channel at a second flow rate higher than the first flow rate.
15 . The method according to claim 14 , further comprising withdrawing the power injection device from the bypass channel, withdrawal of the power injection device allowing the flapper valve to move to a sealed position toward which it is biased.