Patent ID: 8939882
Filing Date: 2015-01-27
Classification: A61M

Abstract:
1. A method for implanting a cannula into a cardiovascular system, the method comprising: creating a single puncture site into the cardiovascular system for receiving the cannula; inserting the cannula through the puncture site such that a distal end of a first lumen of the cannula and a distal end of a second lumen of the cannula pass through the puncture site into the cardiovascular system, the second lumen having a non-circular cross-sectional shape extending between a first end portion and a second end portion, the first and second end portions having rounded corners each with a radius greater than about ten percent of the radius of the largest circle that can be inscribed within the second lumen and less than the radius of the largest circle that can be inscribed within the second lumen; positioning the distal end of the first lumen of the cannula within a first portion of the cardiovascular system; and positioning the distal end of the second lumen of the cannula within a second portion of the cardiovascular system, such that in use blood is received in the cannula from the distal end of the second lumen and blood is pumped from the cannula through the distal end of the first lumen having a cross-sectional area smaller than the cross-sectional area of the second lumen.