Drug delivery cuff
First Claim
Patent Images
1. A cuff for the local delivery of a substance to a graft, comprising:
- a reservoir for holding a drug-containing solution;
a membrane between the reservoir and the graft, the membrane being microporous relative to the drug-containing solution;
a pump provided to introduce the drug-containing solution to the reservoir at an infusion rate no greater than 1.0 ml/day and produce a threshold pressure within the reservoir wherein upon application of the threshold pressure the membrane releases the drug-containing solution from the reservoir to bloodstream within a lumen of the graft in a relatively uniform manner around an inner circumference of the membrane; and
free ends that are configured to be engaged and disengaged from one another via a closure mechanism so as to respectfully attach and remove the cuff to and from the graft.
1 Assignment
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Accused Products
Abstract
Embodiments provide a drug delivery cuff including a drug reservoir. In an embodiment, an integrated drug pump may be provided. A drug delivery cuff in accordance with an embodiment may be placed around any suitable vascular graft (e.g., ePTFE) or directly around any natural tissue conduit (e.g., perivascularly), at any position along the graft/conduit or overlapping a graft and conduit, either at the time of graft surgical placement or separate therefrom.
44 Citations
20 Claims
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1. A cuff for the local delivery of a substance to a graft, comprising:
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a reservoir for holding a drug-containing solution; a membrane between the reservoir and the graft, the membrane being microporous relative to the drug-containing solution; a pump provided to introduce the drug-containing solution to the reservoir at an infusion rate no greater than 1.0 ml/day and produce a threshold pressure within the reservoir wherein upon application of the threshold pressure the membrane releases the drug-containing solution from the reservoir to bloodstream within a lumen of the graft in a relatively uniform manner around an inner circumference of the membrane; and free ends that are configured to be engaged and disengaged from one another via a closure mechanism so as to respectfully attach and remove the cuff to and from the graft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of securing a cuff around a graft, comprising:
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providing a cuff, the cuff comprising; a reservoir for holding a drug-containing solution, a membrane between the reservoir and the graft, the membrane being microporous relative to the drug-containing solution, a pump provided to introduce the drug-containing solution to the reservoir at an infusion rate no greater than 1.0 ml/day and produce a threshold pressure wherein upon application of the threshold pressure the membrane releases the drug-containing solution from the reservoir to bloodstream within a lumen of the graft in a relatively uniform manner around an inner circumference of the membrane, at least two free ends that are configured to be engaged and disengaged from one another via a closure mechanism so as to respectfully attach and remove the cuff to and from the graft; placing the cuff around the graft; and impermanently securing the at least two free ends and the cuff around the graft utilizing the closure mechanism.
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19. A method of delivering a drug to a graft, comprising:
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providing a cuff, the cuff comprising; a reservoir for holding a drug-containing solution, a membrane between the reservoir and the graft, the membrane being microporous relative to the drug-containing solution, a pump provided to introduce the drug-containing solution to the reservoir at an infusion rate no greater than 1.0 ml/day and produce a threshold pressure wherein upon application of the threshold pressure the membrane releases the drug-containing solution from the reservoir to bloodstream within a lumen of the graft in a relatively uniform manner around an inner circumference of the membrane, free ends that are configured to be engaged and disengaged from one another via a closure mechanism so as to respectfully attach and remove the cuff to and from the graft; placing the cuff around the graft; impermanently securing the free ends and the cuff around the graft utilizing the closure mechanism; operating the pump to deliver the drug-containing solution to the reservoir at an infusion rate no greater than 1.0 ml/day and to supply the threshold pressure within the reservoir so that the membrane substantially uniformly delivers the drug-containing solution to the graft, wherein the threshold pressure at least exceeds a mean arterial pressure of the graft; controlling the uniform manner of drug-containing solution release via the membrane and defining a rate of drug-containing solution release via the pump; and controlling the delivery of the drug-containing solution from the reservoir to the graft to be by convective mass transport and limiting diffusive transport of the drug-containing solution from the reservoir to the graft using a microporous character of the inner membrane. - View Dependent Claims (20)
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Specification