Bi-directional perfusion cannula

摘要

A bi-directional perfusion cannula is provided that includes an elongate tube for insertion into an artery. The elongate tube has a first aperture at a distal end of the tube which is forward during insertion and configured so that blood can flow into the artery in the direction of insertion, an elbow formed in the elongate tube, and a second aperture formed in or slightly rearward of the elbow and configured for supplying blood into the artery in a second direction which is generally opposite to the insertion direction.

主权项

1. A bi-directional perfusion cannula comprising an elongate tube configured for insertion into an artery, the elongate tube comprising:
a distal portion comprising a generally cylindrical shape extending along a first longitudinal axis, a generally circular cross-section having a substantially uniform wall thickness, and a first aperture operable to direct blood flow from the tube in a first direction; a proximal portion comprising a generally cylindrical shape extending along a second longitudinal axis that is not collinear with the first longitudinal axis, and a generally circular cross-section having a substantially uniform wall thickness; and an intermediate portion extending between the distal portion and the proximal portion comprising:
a generally arcuate shape;a generally oval cross-section comprising a substantially non-uniform wall thickness, a portion of the wall having a greater wall thickness and comprising a shoulder tapering outwardly in the direction toward the proximal portion;a passageway comprising a substantially unobstructed flow path through the intermediate portion; anda second aperture comprising an opening from the passageway through the portion of the wall having a greater wall thickness that is operable to direct blood flow from the tube in a second direction that is generally opposite to the first direction.