Method and apparatus for percutaneously accessing a pressure activated implanted port
First Claim
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1. A method for delivering a substance to a blood vessel, said method comprising:
- percutaneously introducing an access tube to an implanted port having a flow passageway with an upstream end, a downstream end, and a valve element in the flow passageway and monolithic with the port, wherein the access tube is introduced to seat in the passage but does not engage the valve element and wherein the flow passage is connected directly to the blood vessel; and
introducing said substance into the flow passage through the access tube at a pressure sufficient to open the valve element to permit flow through the flow passageway to the 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.
244 Citations
7 Claims
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1. A method for delivering a substance to a blood vessel, said method comprising:
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percutaneously introducing an access tube to an implanted port having a flow passageway with an upstream end, a downstream end, and a valve element in the flow passageway and monolithic with the port, wherein the access tube is introduced to seat in the passage but does not engage the valve element and wherein the flow passage is connected directly to the blood vessel; and introducing said substance into the flow passage through the access tube at a pressure sufficient to open the valve element to permit flow through the flow passageway to the blood vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification