Heart pump cuff
At least some embodiments of the disclosure may advantageously limit bleeding and the occurrence of blood leaks after heart pump implantation. In some embodiments, a base may be provided that includes a flexible layer mechanically coupled with a conduit. The flexible layer may be coupled with the proximal end of the conduit. The conduit may be configured to receive a cannula of the heart pump therethrough. The outer surface of the conduit may be configured to engage a surface of the heart formed after coring the heart. The conduit may be metal and may have a flared and/or beveled distal end. The conduit may be a flexible material. A distal flexible layer may be provided at a distal end of the conduit that is configured to engage with an inner surface of the heart.
1. A method of coupling a heart pump to a heart of a patient, the method comprising:
suturing a base to the heart such that a distal surface of a flexible layer of the base directly engages an outer surface of the heart, the base comprising a conduit that is coupled with the flexible layer, wherein the conduit comprises a distal portion that extends distally relative to the distal surface of the flexible layer, wherein an outer surface of the distal portion of the conduit comprises a powdered metal coating or a textured surface to promote tissue ingrowth into the textured surface;
coupling a port to the base such that a lumen of the port is in alignment with the conduit;
inserting a cannula of the heart pump through the conduit; and
coupling the heart pump to an engagement feature of the port.
2. The method of claim 1 , wherein the flexible layer comprises a material that promotes tissue ingrowth.
3. The method of claim 1 , further comprising coring an opening in the heart after the base is sutured to the heart.
4. The method of claim 1 , wherein the conduit comprises a metal material and wherein the conduit is sewn, bonded, or crimped to the flexible layer.
5. The method of claim 1 , wherein the flexible layer comprises one or both of a felt material or a graft material.
6. The method of claim 1 , wherein coupling the port to the base comprises suturing the port to the flexible layer of the base.
7. The method of claim 1 , wherein an inner surface of the conduit tapers away from a central axis of the conduit and toward an outer surface of the conduit at a distal end of the conduit to form a beveled distal edge of the conduit.
8. The method of claim 1 , wherein an outer surface of the conduit tapers away from a central axis of the conduit at a distal end of the conduit to form a flared distal end.
9. The method of claim 1 , wherein the conduit comprises a flexible material.
10. The method of claim 9 , wherein the base further comprises a distal flexible layer coupled with a distal end of the conduit, the distal flexible layer configured to engage with an inner surface of the heart disposed about a cored opening in the heart.
11. The method of claim 10 , wherein suturing the base to the heart comprises suturing through the flexible layer, through the outer surface of the heart, through the inner surface of the heart and through the distal flexible layer.
12. The method of claim 1 , wherein the port further comprises a flexible layer and wherein coupling the port to the base comprises suturing the flexible layer of the port to the flexible layer of the base.
13. The method of claim 1 , wherein the engagement feature further comprises a flange that is retainable by a corresponding engagement feature of the heart pump.
14. The method of claim 1 , wherein the distal portion of the conduit enters at least partially into the outer surface of the heart.
15. A method of coupling a heart pump to a heart of a patient, the method comprising:
coring an opening in the heart;
suturing a base to the heart such that a distal surface of a flexible layer of the base directly engages an outer surface of the heart, the base comprising a conduit that is coupled with the flexible layer, wherein the conduit comprises a distal portion that extends distally relative to the distal surface of the flexible layer and comprises a flexible material, wherein suturing the base to the heart comprises suturing through the flexible layer, through the outer surface of the heart, through the surface of the heart formed after coring the heart, and through the flexible conduit;
coupling a port to the base such that a lumen of the port is in alignment with the conduit;
inserting a cannula of the heart pump through the conduit; and
coupling the heart pump to an engagement feature of the port.
16. The method of claim 15 , wherein the conduit comprises a metal material and wherein the conduit is sewn, bonded, or crimped to the flexible layer.
17. The method of claim 15 , wherein the flexible layer comprises one or both of a felt material or a graft material.
18. The method of claim 15 , wherein the flexible layer comprises a material that promotes tissue ingrowth.
19. The method of claim 15 , wherein an inner surface of the conduit tapers away from a central axis of the conduit and toward an outer surface of the conduit at a distal end of the conduit to form a beveled distal edge of the conduit.
20. A method of coupling a heart pump to a heart of a patient, the method comprising:
suturing a base to the heart such that a distal surface of a flexible layer of the base directly engages an outer surface of the heart, the base comprising a conduit that is coupled with the flexible layer, wherein the conduit comprises a distal portion that extends distally relative to the distal surface of the flexible layer;
coupling a port to the base such that a lumen of the port is in alignment with the conduit;
inserting a cannula of the heart pump through the conduit; and
coupling the heart pump to an engagement feature of the port, wherein the heart pump further comprises an engagement feature corresponding with the engagement feature of the port, and wherein a flexible layer is disposed between the engagement feature of the heart pump and the engagement feature of the port when the heart pump is coupled with the engagement feature of the port.