Method and device for the controlled delivery of parathyroid hormone
First Claim
1. A method for controlled delivery of parathyroid hormone to a patient in need thereof comprising:
- implanting a medical device into the patient, the medical device comprising;
a substrate having a plurality of reservoirs,a release system contained in each of the reservoirs, wherein the release system comprises parathyroid hormone, anda plurality of discrete reservoir caps, each being in register with an opening of one of the reservoirs, separating the release system from an environment outside of the reservoirs, and preventing the parathyroid hormone from being released from the medical device;
passing an electric current through one or more of the discrete reservoir caps, via an electrical input lead and an electrical output lead which are electrically connected to said reservoir cap, to disintegrate the one or more discrete reservoir caps by electrothermal ablation, thereby to expose to the environment the release system contained in the one or more reservoirs corresponding to the disintegratd one or more reservoir caps; and
releasing a pharmaceutically effective amount of the parathyroid hormone from the one or more reservoirs corresponding to the disintegrated one or more reservoir caps.
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Accused Products
Abstract
Method and devices are provided for extended and controlled delivery of parathyroid hormone to a patient. The method includes implanting a medical device into the patient, the medical device comprising a substrate, a plurality of reservoirs in the substrate, a release system contained in each of the reservoirs, wherein the release system comprises parathyroid hormone; and controllably releasing a pharmaceutically effective amount of the parathyroid hormone from the reservoirs. The parathyroid hormone can be released intermittently, such as once daily over an extended period (e.g., two months, ten months, or more.). The device can further include reservoirs containing a bone resorption inhibitor or other drug for release. The devices are useful in delivering PTH for the treatment and prevention of bone loss, such as associated with osteoporosis.
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Citations
30 Claims
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1. A method for controlled delivery of parathyroid hormone to a patient in need thereof comprising:
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implanting a medical device into the patient, the medical device comprising; a substrate having a plurality of reservoirs, a release system contained in each of the reservoirs, wherein the release system comprises parathyroid hormone, and a plurality of discrete reservoir caps, each being in register with an opening of one of the reservoirs, separating the release system from an environment outside of the reservoirs, and preventing the parathyroid hormone from being released from the medical device; passing an electric current through one or more of the discrete reservoir caps, via an electrical input lead and an electrical output lead which are electrically connected to said reservoir cap, to disintegrate the one or more discrete reservoir caps by electrothermal ablation, thereby to expose to the environment the release system contained in the one or more reservoirs corresponding to the disintegratd one or more reservoir caps; and releasing a pharmaceutically effective amount of the parathyroid hormone from the one or more reservoirs corresponding to the disintegrated one or more reservoir caps. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable device for controlled delivery of parathyroid hormone to a patient in need thereof comprising:
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a substrate having a plurality of reservoirs; a release system contained in each of the reservoirs, wherein the release system comprises parathyroid hormone; a plurality of discrete reservoir caps, each reservoir cap comprising a metal film in register with an opening of one of the reservoirs, separating the release system from an environment outside of the reservoirs, and preventing the parathyroid hormone from being released from the implantable device; and means for disintegrating one or more of the discrete reservoir caps by electrothermal ablation to release the parathyroid hormone from one or more of the reservoirs, wherein the means for disintegrating comprises (i) an electrical input lead and an electrical output lead which are electrically connected to at least one of said reservoir caps, (ii) a power source, and (iii) a control means for controlling application of an electric current from the power source through said at least one of the reservoir caps, via the input and output leads. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An implantable device for controlled delivery of parathyroid hormone to a patient in need thereof comprising:
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a body having a plurality of reservoirs; a release system contained in each of the reservoirs, wherein the release system comprises parathyroid hormone; an electrically conductive reservoir cap covering a discrete, predefined opening in each reservoir; a conducting input lead and a conducting output lead each of which are physically and electrically connected to each reservoir cap; and a power source and a controller for selectively delivering an electric current through the reservoir cap via the conducting leads effective to rupture the reservoir cap and release a pharmaceutically effective amount of the parathyroid hormone from the reservoir. - View Dependent Claims (26, 27, 28, 29, 30)
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Specification