Methods and devices for endocardiac access
First Claim
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1. A transcardiac instrument port for placement in a heart wall to allow passage into a chamber of the heart, comprising:
- a cylindrical body portion defining a lumen and having an outer surface, a heart wall portion, and distal and proximal ends;
a valve associated with the lumen that allows passage of an instrument through the lumen but minimizes flow of blood out of the heart through the lumen; and
a sealing device on the body portion outer surface that minimizes blood flow from out of the heart around the outside of the port.
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Abstract
Methods and devices for performing endocardiac treatments using an instrument port placed in the heart wall and an instrument guide which has a steerable tip and which is inserted through the instrument port, allows passage of an instrument therethrough into a heart chamber, and steers the functional tip of the instrument to the desired location for treatment.
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Citations
20 Claims
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1. A transcardiac instrument port for placement in a heart wall to allow passage into a chamber of the heart, comprising:
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a cylindrical body portion defining a lumen and having an outer surface, a heart wall portion, and distal and proximal ends;
a valve associated with the lumen that allows passage of an instrument through the lumen but minimizes flow of blood out of the heart through the lumen; and
a sealing device on the body portion outer surface that minimizes blood flow from out of the heart around the outside of the port. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An instrument guide for guiding an instrument to a desired location inside a heart and steering the tip of the instrument to a desired location inside the heart, comprising:
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a handle;
a body portion defining a lumen to allow passage of an instrument therethrough and having a length from about 8 to 12 inches; and
a steerable tip that is positionable at a desired bend;
wherein the body portion is stiff relative to the steerable tip and is pushable with minimal bending. - View Dependent Claims (9, 10)
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11. An endocardiac access system for forming a passageway through a heart wall and guiding an instrument functional tip into position at a desired location in a heart chamber, comprising an instrument port for placement in the heart wall and an instrument guide for insertion through the instrument port, wherein:
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the instrument port comprises a cylindrical body portion defining a lumen and having an outer surface, a heart wall portion, and distal and proximal ends;
a valve associated with the lumen that allows passage of an instrument through the lumen but minimizes flow of blood out of the heart through the lumen; and
a sealing device on the body portion outer surface that minimizes blood flow from out of the heart around the outside of the port; and
whereinthe instrument guide comprises a body portion defining a lumen and a steerable tip and wherein an instrument can be inserted through the instrument guide lumen and the functional tip of the instrument guided to the desired location. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A minimally invasive method for forming a passageway for an instrument through a heart wall while minimizing blood flow out of the heart, comprising the steps,
piercing the heart wall to form a hole therethrough; -
inserting an instrument port through the hole, wherein the instrument port comprises a cylindrical body portion defining a lumen and having an outer surface, a heart wall portion, and distal and proximal ends, a valve associated with the lumen that allows passage of an instrument through the lumen but minimizes flow of blood out of the heart through the lumen, and a sealing device on the body portion outer surface that minimizes blood flow from out of the heart around the outside of the port; and
inserting an instrument guide through the lumen of the instrument port, wherein the instrument guide comprises a body portion and a steerable flexible tip.
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19. A method for using a percutaneous access catheter in a minimally invasive endocardiac procedure, comprising the steps,
piercing the heart wall to form a hole therethrough; -
inserting an instrument port through the hole, wherein the instrument port comprises a cylindrical body portion defining a lumen and having an outer surface, a heart wall portion, and distal and proximal ends, a valve associated with the lumen that allows passage of an instrument through the lumen but minimizes flow of blood out of the heart through the lumen, and a sealing device on the body portion outer surface that minimizes blood flow from out of the heart around the outside of the port;
inserting an instrument guide through the lumen of the instrument port, wherein the instrument guide comprises a body portion and a steerable flexible tip; and
inserting the percutaneous access catheter through the instrument guide so that the distal tip of the percutaneous catheter extends from the distal tip of the instrument guide and can be guided to the desired treatment location by movement of the instrument guide steerable tip.
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20. An assembly for using a percutaneous access catheter in a minimally invasive endocardiac procedure comprising:
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a percutaneous access catheter having a functional tip;
an instrument port for placement in the heart wall and forming a passageway through the heart wall; and
an instrument guide for insertion through the instrument port and having a relatively stiff body portion and a steerable tip;
wherein the percutaneous access catheter can be inserted through the instrument guide and its functional tip steered to the desired location within the heart.
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Specification