HEART ASSIST SYSTEM AND METHODS

摘要

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.

主权项

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.