Method and apparatus for percutaneously accessing a pressure activated implanted port
First Claim
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1. An implantable port comprising:
- a body having a flow passage therethrough, said flow passage having an upstream end and a downstream end, wherein at least a portion of the upstream end is adapted to sealingly engage an access tube which is inserted into said upstream end;
a pressure-responsive valve element positioned in the flow passage and integrally formed with the port body downstream from the upstream portion so that an access tube can be fully inserted into said upstream portion without engaging the valve component, wherein the valve component is closed in the absence of a differential pressure above a threshold level; and
a cannula connected at a proximal end of the flow passage and having a distal end adapted to connect to a blood vessel.
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Abstract
Methods and apparatus for percutaneously accessing an implanted port using an access tube which is periodically introduced to the implanted port. The apparatus is preferably an implantable port having a pressure-responsive valve element. It has been found that repeated passage of the access tube through the same tissue tract to the implantable port reduces patient trauma, with minimized bleeding and reduction in sensitivity. The tract may be initially formed by percutaneously placing a penetrating element through intact skin to the port and leaving the element in place for a time sufficient to created the tract.
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Citations
16 Claims
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1. An implantable port comprising:
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a body having a flow passage therethrough, said flow passage having an upstream end and a downstream end, wherein at least a portion of the upstream end is adapted to sealingly engage an access tube which is inserted into said upstream end;
a pressure-responsive valve element positioned in the flow passage and integrally formed with the port body downstream from the upstream portion so that an access tube can be fully inserted into said upstream portion without engaging the valve component, wherein the valve component is closed in the absence of a differential pressure above a threshold level; and
a cannula connected at a proximal end of the flow passage and having a distal end adapted to connect to a blood vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification