Patent ID: 8795253

Claim:
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; and a 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.