Dynamic cannula
First Claim
Patent Images
1. An expandable cannula having a first state having a constricted diameter and a second state having an expanded diameter for at least a portion of its length, said cannula comprising:
- a tube comprising a material that enables the diameter along at least a portion of its length to increase radially from the first state to the second state, said tube havingi) a wall enclosing a lumen;
ii) a proximal end; and
iii) a distal end;
wherein the wall of at least a portion of the tube of the cannula in the second state gradually flares from the constricted diameter to the expanded diameter at an angle of up to 20 degrees from a central axis of the tube to form a funnel shape.
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Accused Products
Abstract
A perfusion cannula constructed of a wire mesh or other structure having an expandable portion capable of expanding from a constricted state to an expanded state such that a vessel is stented open while permitting fluid flow through a cannula into the vessel.
71 Citations
36 Claims
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1. An expandable cannula having a first state having a constricted diameter and a second state having an expanded diameter for at least a portion of its length, said cannula comprising:
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a tube comprising a material that enables the diameter along at least a portion of its length to increase radially from the first state to the second state, said tube having i) a wall enclosing a lumen; ii) a proximal end; and iii) a distal end; wherein the wall of at least a portion of the tube of the cannula in the second state gradually flares from the constricted diameter to the expanded diameter at an angle of up to 20 degrees from a central axis of the tube to form a funnel shape. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification