Cannula systems and methods
First Claim
1. An apparatus, comprising:
- an elongate tubular member having a proximal end portion, a distal end portion, an inner surface and an outer surface, the inner surface defining a lumen extending between the proximal end portion and the distal end portion;
a wire coupled to the elongate tubular member such that at least a portion of the wire is disposed between the inner surface and the outer surface, the wire configured to move between a first configuration and a second configuration, the wire configured to form a flared structure at the distal end portion of the elongate tubular member when the wire is in the second configuration;
a fabric material disposed about the distal end portion of the elongate tubular member at a junction along the inner surface of the elongate tubular member, the junction forming a circumferential step between the fabric material and the elongate tubular member, the fabric material formulated to promote tissue ingrowth when the flared structure is coupled to a first side of an organ wall; and
a retaining element coupled to the elongate tubular member, the retaining element configured to contact a second side of the organ wall to couple the organ wall between the flared structure and the retaining element.
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Accused Products
Abstract
Disclosed herein is a cannula assembly for directing the flow of material from an organ chamber, e.g., blood from the left chamber of the heart, and methods of placing the cannula assembly in fluidic communication with the chamber. The cannula assembly includes an elongate tubular member and a coupling assembly disposed at the distal end of elongate tubular member. The elongate tubular member includes a lumen extending from a distal opening at the distal end to a proximal opening at the proximal end. The coupling assembly includes a retaining element and a retention member configured to cooperate with each other and with the portion of the organ wall surrounding the opening in the wall to couple or anchor cannula system to the wall and to provide fluidic communication between the distal opening of the elongate tubular member and the organ chamber.
226 Citations
13 Claims
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1. An apparatus, comprising:
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an elongate tubular member having a proximal end portion, a distal end portion, an inner surface and an outer surface, the inner surface defining a lumen extending between the proximal end portion and the distal end portion; a wire coupled to the elongate tubular member such that at least a portion of the wire is disposed between the inner surface and the outer surface, the wire configured to move between a first configuration and a second configuration, the wire configured to form a flared structure at the distal end portion of the elongate tubular member when the wire is in the second configuration; a fabric material disposed about the distal end portion of the elongate tubular member at a junction along the inner surface of the elongate tubular member, the junction forming a circumferential step between the fabric material and the elongate tubular member, the fabric material formulated to promote tissue ingrowth when the flared structure is coupled to a first side of an organ wall; and a retaining element coupled to the elongate tubular member, the retaining element configured to contact a second side of the organ wall to couple the organ wall between the flared structure and the retaining element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification