OXYGEN MASK Russian patent published in 1995 - IPC

FIELD: medical engineering. SUBSTANCE: extracardiac shunt has cannula 1, corrugated vessel prosthesis 2, fabric shield 3 and cuff 4. Outer surface of cannula 1 has thread 5 whose shape and height of profile correspond to those of stiffeners 6 of vessel prosthesis 2 and is coated with fabric shield 3 with cuff 4 secured over perimeter at a distance equal to 0.5-1.5 of the cannula diameter from leading edge. Wall of cannula 1 is smoothly thinning on side of its inlet and outlet; thickness of trailing edge corresponds to height of stiffener 6. Outlet end surface 7 of cannula 1 is inclined relative to plane perpendicular to central axis of cannula 1 at angle corresponding to helix angle. Groove 8 is made on outer surface of cannula 1. EFFECT: enhanced reliability and thromboresistance of extracardiac shunt. 4 cl, 1 dwg