Shunt for redistributing atrial blood volume
First Claim
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1. A method for regulating blood volume distribution across a patient'"'"'s interatrial septum between the patient'"'"'s left atrium and the patient'"'"'s right atrium, the method comprising:
- forming a puncture through a fossa ovalis of the interatrial septum;
percutaneously delivering an anchor in a contracted delivery state through the puncture of the interatrial septum, the anchor having a first region, a second region, a neck region joining the first region to the second region;
transitioning the anchor from the contracted delivery state to an expanded deployed state in which the first region extends into the patient'"'"'s left atrium, the second region extends into the patient'"'"'s right atrium, and the neck region engages the interatrial septum; and
shunting blood through a lumen of a conduit affixed to the anchor, the conduit comprising a first end that extends from the neck region a first distance of at least 3 mm into the patient'"'"'s left atrium and a second end that extends from the neck region a second distance of at least 3 mm into the patient'"'"'s right atrium, thereby preventing pannus formation from narrowing the lumen in the neck region,wherein the lumen of the conduit is defined by a lumen wall, the lumen wall resistant to transmural tissue growth.
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Abstract
A shunt for regulating blood pressure between a patient'"'"'s left atrium and right atrium comprises an anchor comprising a neck region, first and second end regions, and a conduit affixed with the anchor that formed of a biocompatible material that is resistant to transmural and translation tissue ingrowth and that reduces a risk of paradoxical embolism.
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Citations
20 Claims
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1. A method for regulating blood volume distribution across a patient'"'"'s interatrial septum between the patient'"'"'s left atrium and the patient'"'"'s right atrium, the method comprising:
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forming a puncture through a fossa ovalis of the interatrial septum; percutaneously delivering an anchor in a contracted delivery state through the puncture of the interatrial septum, the anchor having a first region, a second region, a neck region joining the first region to the second region; transitioning the anchor from the contracted delivery state to an expanded deployed state in which the first region extends into the patient'"'"'s left atrium, the second region extends into the patient'"'"'s right atrium, and the neck region engages the interatrial septum; and shunting blood through a lumen of a conduit affixed to the anchor, the conduit comprising a first end that extends from the neck region a first distance of at least 3 mm into the patient'"'"'s left atrium and a second end that extends from the neck region a second distance of at least 3 mm into the patient'"'"'s right atrium, thereby preventing pannus formation from narrowing the lumen in the neck region, wherein the lumen of the conduit is defined by a lumen wall, the lumen wall resistant to transmural tissue growth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for regulating blood volume distribution between a patient'"'"'s left atrium and the patient'"'"'s right atrium, the method comprising:
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forming a puncture through a fossa ovalis of the interatrial septum; percutaneously delivering an anchor in a contracted delivery state through the puncture of the interatrial septum, the anchor having a first region, a second region, and a neck region disposed between the first and second regions; transitioning the anchor from the contracted delivery state to an expanded deployed state in which the first region is disposed in the patient'"'"'s left atrium, the second region is disposed in the patient'"'"'s right atrium, and the neck region engages a fossa ovalis of the patient'"'"'s interatrial septum; and shunting blood through a lumen of a conduit affixed to the anchor, the conduit comprising an end that protrudes into the right atrium a distance sufficient to place the end out of a natural circulation flow path in the right atrium, thereby reducing a risk that thrombus entrained in the natural circulation flow path will be directed into the lumen. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification