Valve port and method for vascular access
First Claim
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1. An implantable port comprisinga base having a passage for receiving an access tube;
- a valve assembly in the base, said valve assembly having a bore which receives the access tube and wherein the valve assembly opens in response to movement of the access tube; and
a valve lock having a latch which shifts position to lock the valve assembly open in response to movement of the access tube;
wherein the valve assembly comprises a plunger and wherein the latch comprises a pair of space-filling elements which are displaced by the needle both downwardly, to lower the plunger to open the valve, and outwardly into the receptacle, to lock the plunger open.
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Abstract
Valved ports for accessing blood vessels and other body lumens include a lock mechanism which locks the valve fully open when a needle or other access tube is placed into the port. The lock mechanism includes a latch typically comprising one or more laterally deflectable elements, such as a pair of opposed balls. The deflected elements are pushed outwardly by the needle to engage a recess in the port which locks the valve open until the needle is removed.
161 Citations
10 Claims
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1. An implantable port comprising
a base having a passage for receiving an access tube; -
a valve assembly in the base, said valve assembly having a bore which receives the access tube and wherein the valve assembly opens in response to movement of the access tube; and a valve lock having a latch which shifts position to lock the valve assembly open in response to movement of the access tube; wherein the valve assembly comprises a plunger and wherein the latch comprises a pair of space-filling elements which are displaced by the needle both downwardly, to lower the plunger to open the valve, and outwardly into the receptacle, to lock the plunger open. - View Dependent Claims (2, 3, 4, 5)
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6. An implantable port comprising
a base having a passage for receiving an access tube; -
a valve assembly in the base, said valve assembly having a bore which receives the access tube and wherein the valve assembly opens in response to movement of the access tube; a valve lock having a latch comprising a pair of balls which are displaced laterally into a receptacle and remain in the receptacle to lock the valve assembly open in response to movement of the access tube. - View Dependent Claims (7, 8, 9, 10)
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Specification