Transseptal cannula, tip, delivery system, and method

摘要

A cannula assembly, further comprising a cannula body for directing blood from the heart of a patient, having distal and proximal ends and a lumen therebetween. A tip coupled to the distal end of the body, the tip having an opening. A pump for drawing blood into the cannula assembly and dispensing the blood from the cannula assembly and into the patient circulatory system. The lumen of the cannula body further comprises a first inner diameter at the proximal end and a second inner diameter at the distal end, the first inner diameter being larger than the second inner diameter. A tapered portion defined as a decrease in inner diameter from the first inner diameter to the second inner diameter between the proximal and distal ends, the tapered portion configured to prevent cavitation of the blood within the cannula.

主权项

1. A circulatory assist system, comprising:
a cannula assembly having distal and proximal ends and a lumen therebetween; a pump for drawing blood into the cannula assembly and dispensing the blood from the cannula assembly and into the patient circulatory system; and a delivery sheath for delivering the cannula assembly through the patient circulatory system, wherein the delivery sheath is configured to receive the cannula assembly and move relative thereto for deploying the cannula assembly adjacent a heart cavity and further comprises a distal end, a proximal end, and a body therebetween; and a tensile element carried and extending along a length of the body, the tensile element configured to prevent deformation of the body when the cannula assembly moves relative to the delivery sheath.