Devices and systems for local delivery of inotropic agents to the epicardium
First Claim
1. A preformed epicardial patch for delivery of a positive inotropic agent to the heart of a patient, comprising:
- a backing layer which is substantially impermeable to the positive inotropic agent; and
a drug release layer attached to the backing layer and comprising the positive inotropic agent and a polymeric membrane material, which, upon placement of the epicardial patch onto a portion of the epicardial surface of the heart, the polymeric membrane material comprising a diffusion-controlling material configured to provide controlled release of the positive inotropic agent to the epicardium to a region of the myocardium and in an amount effective to increase contractility by providing a myocardial concentration of the positive inotropic agent in the range of 10 ng/ml to 100 ng/ml while maintaining plasma concentrations of the inotropic agent below 5 ng/ml,wherein at least one of the backing layer or the drug release layer comprises a tissue coupling portion for affixing the epicardial patch to an area of the epicardial surface, andwherein the epicardial patch is dimensioned and compliant to avoid impeding myocardial functionality when affixed to the area of the epicardial surface, the epicardial patch having a surface area of at least 12 cm2.
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Accused Products
Abstract
Devices and methods are provided for delivery of a positive inotropic agent to the heart of a patient in need thereof. An epicardial patch includes (i) a backing layer which is impermeable to the positive inotropic agent; and (ii) a drug release layer attached to the backing layer and including the positive inotropic agent and a polymeric membrane material. The polymeric membrane material provides controlled release of the positive inotropic agent to the epicardium to a region of the myocardium and in an amount effective to increase contractility. At least one of the backing layer or the drug release layer includes a tissue coupling portion for affixing the epicardial patch to an area of the epicardial surface. The epicardial patch is dimensioned and compliant to substantially avoid impeding myocardial functionality when affixed to the area of the epicardial surface.
19 Citations
24 Claims
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1. A preformed epicardial patch for delivery of a positive inotropic agent to the heart of a patient, comprising:
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a backing layer which is substantially impermeable to the positive inotropic agent; and a drug release layer attached to the backing layer and comprising the positive inotropic agent and a polymeric membrane material, which, upon placement of the epicardial patch onto a portion of the epicardial surface of the heart, the polymeric membrane material comprising a diffusion-controlling material configured to provide controlled release of the positive inotropic agent to the epicardium to a region of the myocardium and in an amount effective to increase contractility by providing a myocardial concentration of the positive inotropic agent in the range of 10 ng/ml to 100 ng/ml while maintaining plasma concentrations of the inotropic agent below 5 ng/ml, wherein at least one of the backing layer or the drug release layer comprises a tissue coupling portion for affixing the epicardial patch to an area of the epicardial surface, and wherein the epicardial patch is dimensioned and compliant to avoid impeding myocardial functionality when affixed to the area of the epicardial surface, the epicardial patch having a surface area of at least 12 cm2. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of administering a positive inotropic agent to a heart of a patient in need thereof comprising:
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providing an implantable epicardial patch which is affixable to an area of an epicardial surface of the heart, the epicardial patch comprising (i) a backing layer which is impermeable to the positive inotropic agent, and (ii) a drug release layer attached to the backing layer, wherein the drug release layer comprises the positive inotropic agent and a polymeric membrane material; placing the epicardial patch onto a portion of the epicardial surface of the heart; and providing via the polymeric membrane material controlled release of the positive inotropic agent from the epicardial patch to the epicardium to a region of the myocardium in an amount effective to increase contractility by providing a myocardial concentration of the positive inotropic agent in the range of 10 ng/ml to 100 ng/ml while maintaining plasma concentrations of the inotropic agent below 5 ng/ml. - View Dependent Claims (24)
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Specification