METHODS AND SYSTEMS FOR PENETRATING ADJACENT TISSUE LAYERS
First Claim
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1. A method for advancing a dilator distally through apposed luminal walls of adjacent first and second body lumens at a target site on an anterior surface of a first luminal wall, said method comprising:
- deploying a tension anchor through the apposed luminal walls at a location laterally offset from the target site;
drawing the tension anchor proximally to hold a posterior surface of the first luminal wall against an anterior surface of a second luminal wall; and
advancing the dilator through the walls at the target site while continuing to hold the luminal wall surfaces together, wherein the dilator creates an enlarged passage.
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Abstract
Penetration and dilation of passages from a first body lumen to a second body lumen are achieved while providing tension anchoring of the luminal walls to inhibit the leakage of body fluids. In one embodiment, one or more T-bar anchors may be used to provide the tensioning of the body lumen walls. In a second embodiment, a plurality of hooked or everted wires may be provided on a catheter which is used to penetrate and dilate a passage between the luminal walls.
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Citations
23 Claims
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1. A method for advancing a dilator distally through apposed luminal walls of adjacent first and second body lumens at a target site on an anterior surface of a first luminal wall, said method comprising:
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deploying a tension anchor through the apposed luminal walls at a location laterally offset from the target site; drawing the tension anchor proximally to hold a posterior surface of the first luminal wall against an anterior surface of a second luminal wall; and advancing the dilator through the walls at the target site while continuing to hold the luminal wall surfaces together, wherein the dilator creates an enlarged passage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for dilating a passage through apposed luminal walls, said apparatus comprising:
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a catheter having a proximal end, a distal end, and a central passage therethrough; a needle having a tissue penetrating distal tip, said needle being reciprocatably mounted in the central passage of the catheter so that the tissue penetrating distal tip can be advanced beyond said distal tip to penetrate the apposed luminal walls; a dilator slidably mounted over the needle so that the dilator can be advanced to dilate the penetration formed by the needle through the apposed luminal walls; and a tension anchor reciprocatably mounted on the catheter to penetrate a tissue location which is laterally offset from the dilator penetration location. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification