Method and apparatus for percutaneously accessing an implanted port
First Claim
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1. A method for percutaneously accessing an implanted port, said method comprising:
- locating a preformed access tract from a skin entry point to the port; and
percutaneously introducing a cannula through the preformed access tract to establish a flow path through the cannula to the port, wherein the port has an internal valve that inhibits bleed back into the tissue tract after the cannula is withdrawn.
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Abstract
Methods and apparatus for percutaneously accessing an implanted port use an access cannula which is periodically introduced to an aperture on the implanted port so that the cannula passes through the same tissue tract. It has been found that repeated passage of the cannula through the same tissue tract reduces patient trauma, with minimized bleeding, 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
91 Claims
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1. A method for percutaneously accessing an implanted port, said method comprising:
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locating a preformed access tract from a skin entry point to the port; and percutaneously introducing a cannula through the preformed access tract to establish a flow path through the cannula to the port, wherein the port has an internal valve that inhibits bleed back into the tissue tract after the cannula is withdrawn. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 24, 25)
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12. A method for forming a percutaneous access tract to an implanted port, said method comprising:
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percutaneous introducing a cannula to define an access tract having a skin entry point and extending to the port; and repeatedly accessing the port with a cannula through the same access tract at intervals of at least twice a week for a period of at least three months. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 26, 27)
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22. A method for aligning an access cannula, said method comprising:
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observing an access site on skin at the proximal end of a preformed access tract, wherein said access site overlies an implanted port capable of removably receiving the access cannula through the access tract having an internal valve that inhibits bleed back into the tissue tract after the access tube is removed; and aligning an access cannula with the access site and at an angle coaxial with that of the access tract. - View Dependent Claims (23)
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28. A method comprising (1) advancing and inserting an access cannula into an implantable vascular or peritoneal access port to gain access to the port while simultaneously opening a closure valve of said port which is normally biased closed;
- (2) exchanging fluid between said cannula and said port; and
(3) withdrawing said needle from the port and allowing said valve to close;characterized in that steps 1 to 3 are repeated with the cannula travelling along the same access tract.
- (2) exchanging fluid between said cannula and said port; and
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29. The method of use of an implantable access port having an actuatable valve biased in a closed position wherein access cannulas repeatedly access said port along the same access tract, in a therapeutic process wherein the port is connected to a blood vessel and the process comprises removing blood through a port from a patient, processing said blood, and returning the blood through a port to the patient.
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30. The method of use of an implantable access port having an actuatable valve biased in a closed position wherein access cannulas repeatedly access said port along the same access tract, in a therapeutic process wherein the port is connected to the peritoneum and the process comprises introducing dialysate to the patient through the port and thereafter removing dialysate from the patient through the port.
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31. A method for percutaneously accessing an implanted port having an aperture, said method comprising:
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locating a preformed access tract from a skin entry point to the port; annularly feeling the port to determine the position of the aperture; manually aligning the cannula with a line from the skin entry point of the access tract to the aperture on the port; and percutaneously introducing a cannula through the preformed access tract into the aperture to establish a flow path through the cannula to the port. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 53, 59)
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41. A method for forming a percutaneous access tract to an implanted port, said method comprising:
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percutaneous introducing a cannula to define an access tract having a skin entry point and extending to the port, wherein the port has an internal valve that inhibits bleed back into the tissue tract after the cannula is withdrawn; and repeatedly accessing the port with a cannula through the same access tract at intervals and over a time period sufficient to cause scar tissue formation over the access tract. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 55, 61, 62, 63, 64, 65, 66, 67, 68, 69)
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51. A method for creating an access tract to a subcutaneously implanted port, said method comprising:
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implanting a port in a subcutaneous tissue pocket, wherein an access cannula-receiving aperture of the port is disposed beneath an intact region of skin; and introducing a penetrating element through the intact region of skin into the aperture, wherein the element remains anchored in the aperture for at least one week. - View Dependent Claims (52, 54, 57, 58)
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56. A kit as in further comprising a catheter connected or connectable to the cannula.
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60. A method for percutaneously accessing an implanted port, said method comprising:
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locating a preformed access tract from a skin entry point to the port; and percutaneously introducing a cannula through the preformed access tract to establish a flow path through the cannula to the port, wherein the cannula has a bore size of at least 1.16 mm and dilates the access tract as it is introduced therethrough. - View Dependent Claims (79, 80)
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70. A method for forming a percutaneous access tract to an implanted port, said method comprising:
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percutaneous introducing a cannula to define an access tract having a skin entry point and extending to the port, wherein the cannula has a bore size of at least 1.16 mm and dilates the access tract as it is introduced therethrough; and repeatedly accessing the port with a cannula through the same access tract at intervals and over a time period sufficient to cause scar tissue formation over the access tract. - View Dependent Claims (71, 72, 73, 74, 75, 76, 77, 78, 81, 82)
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83. A method for percutaneously accessing an implanted port, said method comprising:
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locating a preformed access tract from a skin entry point to the port; and percutaneously introducing a cannula comprising a blunt tube having a stylet removably received therein through the preformed access tract to establish a flow path through the cannula to the port. - View Dependent Claims (84, 85, 86, 87, 88, 89, 90, 91)
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Specification