Heart assist system and methods
First Claim
1. A system for drawing blood from a heart of a patient, comprising:
- a blood pump having an inlet and an outlet;
an outflow cannula configured to fluidly communicate the outlet to a patient circulatory system;
a flexible cannula assembly configured to extend through an external wall of the heart, and to an internal structure of the heart to fluidly communicate a chamber of the heart and the inlet, the cannula assembly further comprising;
a flexible cannula body including a proximal end, a distal end, an inner wall defining a lumen, and an outer wall,a tip coupled with the distal end of the cannula body, andan anchor coupled to the tip, the anchor configured to engage the internal structure of the heart and operable to resist movement of the cannula assembly in at least one direction along a lengthwise central axis of the flexible cannula body; and
at least one ring member configured to be coupled to the external wall and positioned at least partially around the outer wall of the cannula body proximally relative to the tip, the at least one ring member further configured to provide hemostasis between the external wall and the cannula body.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for drawing blood from a heart of a patient, includes a blood pump, an outflow cannula and a flexible cannula assembly. The cannula assembly further includes a flexible cannula body including a proximal end, a distal end, an inner wall defining a lumen, and an outer wall. A tip is coupled with the distal end of the cannula body, and an anchor is coupled to the tip. The anchor is configured to engage an internal structure of the heart and resists movement of the cannula assembly in at least one direction along the flexible cannula body. A ring member is configured to be coupled to the heart wall and is positioned at least partially around the outer wall of the cannula body proximally relative to the tip. The ring member is further configured to provide hemostasis between the heart wall and the cannula body.
-
Citations
50 Claims
-
1. A system for drawing blood from a heart of a patient, comprising:
-
a blood pump having an inlet and an outlet; an outflow cannula configured to fluidly communicate the outlet to a patient circulatory system; a flexible cannula assembly configured to extend through an external wall of the heart, and to an internal structure of the heart to fluidly communicate a chamber of the heart and the inlet, the cannula assembly further comprising; a flexible cannula body including a proximal end, a distal end, an inner wall defining a lumen, and an outer wall, a tip coupled with the distal end of the cannula body, and an anchor coupled to the tip, the anchor configured to engage the internal structure of the heart and operable to resist movement of the cannula assembly in at least one direction along a lengthwise central axis of the flexible cannula body; and at least one ring member configured to be coupled to the external wall and positioned at least partially around the outer wall of the cannula body proximally relative to the tip, the at least one ring member further configured to provide hemostasis between the external wall and the cannula body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method of drawing blood from a heart of a patient using a flexible cannula assembly including a cannula body having a proximal end, a distal end, and a lumen therebetween, and a tip coupled to the distal end of the cannula body, the method comprising:
-
introducing distal portion of a flexible cannula assembly including a tip through an external wall of the heart such that the tip is in fluid communication with a first chamber of the heart; advancing the cannula assembly through an internal structure of the heart that separates the first chamber from a second chamber, until the tip is in fluid communication with the second chamber; deploying an anchor coupled to the tip in order to secure the tip to the internal structure; coupling a proximal end of the cannula body to an inlet of a pump; sealing the cannula body to the external wall of the heart to provide hemostasis between the external wall and the cannula body; and operating the pump to draw blood through the tip from the second chamber and into the lumen of the cannula body. - View Dependent Claims (12, 13, 14)
-
-
15. A system for securing a flexible cannula assembly to an external wall and an internal structure of a heart of a patient, comprising:
-
a flexible cannula assembly, further comprising; a flexible cannula body including a proximal end, a distal end, an inner wall defining a lumen, and an outer wall, a tip coupled with the distal end of the cannula body, and an anchor coupled to the tip, the anchor configured to engage the internal structure of the heart and operable to resist movement of the cannula assembly in at least one direction along a lengthwise central axis of the flexible cannula body; and at least one ring member configured to be coupled to the external wall and positioned at least partially around the outer wall of the cannula body proximally relative to the tip, the at least one ring member further configured to provide hemostasis between the external wall and the cannula body.
-
-
16. A method of securing a flexible cannula assembly to an external wall and an internal structure of a heart of a patient, the flexible cannula assembly including a cannula body having a proximal end, a distal end, and a lumen therebetween, and a tip coupled to the distal end of the cannula body, the method comprising:
-
introducing distal portion of a flexible cannula assembly including a tip through an external wall of the heart such that the tip is in fluid communication with a first chamber of the heart; advancing the cannula assembly through an internal structure of the heart that separates the first chamber from a second chamber, until the tip is in fluid communication with the second chamber; deploying an anchor coupled to the tip in order to secure the tip to the internal structure; placing at least one ring member around an outer wall of the cannula body, the at least one ring member defining an aperture sized to interference fit with the outer wall of the cannula body; and coupling the at least one ring member to the external wall of the heart to provide hemostasis between the external wall and the cannula body, wherein the at least one ring member is spaced proximally from the tip.
-
-
17. A delivery system for delivering a cannula assembly to a heart of a patient, comprising:
-
a flexible cannula assembly including a cannula body having a proximal portion and a distal portion; and a delivery sheath including a set of rigid jaws movable between an open configuration and a closed configuration, wherein the jaws define a lumen in the closed configuration to receive the cannula assembly for traveling to the heart as a unit with the cannula assembly. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
-
-
34. A method of implanting a circulatory assist system for assisting in the flow of blood through a patient circulatory system, the circulatory assist system comprising a flexible cannula assembly for directing blood from the heart of a patient, the cannula assembly comprising a cannula body including a proximal end, a distal portion, and a lumen therebetween, the method comprising:
-
directing a guide-element through an external wall of the heart; further directing the guide-element into the heart such that a distal portion of the guide element is positioned adjacent to an internal structure of the heart; inserting a delivery system over the guide-element, through the external wall and adjacent the internal structure, wherein the delivery system includes the cannula assembly and a delivery sheath having a set of rigid jaws movable between an open configuration and a closed configuration, wherein the jaws define a lumen in the closed configuration to receive the cannula assembly for movement relative thereto; moving the cannula assembly relative to the delivery sheath such that at least a distal portion of the cannula extends distally from the delivery sheath; coupling the distal portion of the cannula assembly to the internal structure; retracting the delivery sheath towards a proximal portion of the cannula assembly and back through the external wall; and moving the jaws to the open configuration and further retracting the delivery sheath. - View Dependent Claims (35, 36, 37, 38, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
-
-
39. The method of 38, further comprising:
decoupling the stop member from the cannula assembly and/or the delivery sheath, before retracting the delivery sheath towards the proximal portion of the cannula assembly.
Specification