Cannula tip for a cardiac assist device
First Claim
1. An inflow cannula tip for use with a cardiac assist device, comprising:
- a hollow cylindrical body having a first end adapted for connection to a cannula for an implantable cardiac assist device; and
an open-ended inlet portion at a second end of said body comprising two unconnected projections extending from said body and forming two gaps between said projections;
wherein a ratio of a diameter of the inlet portion to the depth of the gaps is in a range of between approximately 1.5-3.5.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides an inflow cannula tip that is shaped to prevent suction with the ventricular wall and adapted to prevent platelet adhesion. In particular, the inlet portion of the cannula tip comprises two projections extending from the cylindrical body of the cannula tip with gaps between the projections. The projections may have beveled edges. The inlet portion of the cannula tip can accept blood flow from either the gaps in the side or from the bottom of the tip. Even if the edge of the cannula tip is close to or even touching ventricle wall, a suction condition will not result, as blood is allowed to flow through the gaps between the projections.
24 Citations
22 Claims
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1. An inflow cannula tip for use with a cardiac assist device, comprising:
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a hollow cylindrical body having a first end adapted for connection to a cannula for an implantable cardiac assist device; and
an open-ended inlet portion at a second end of said body comprising two unconnected projections extending from said body and forming two gaps between said projections;
wherein a ratio of a diameter of the inlet portion to the depth of the gaps is in a range of between approximately 1.5-3.5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An inflow cannula tip for use with a cardiac assist device, comprising:
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a hollow cylindrical body having a first end adapted for connection to a cannula for an implantable cardiac assist device; and
an open-ended inlet portion at a second end of said body comprising two unconnected projections extending from said body and forming two gaps between said projections;
wherein said two gaps comprise a proximal gap and a distal gap, said distal gap having a smaller depth than said proximal gap. - View Dependent Claims (20, 21, 22)
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Specification