Medical device for controlled drug delivery and cardiac monitoring and/or stimulation
First Claim
1. A medical device for controlled drug delivery in cardiac care in a patient comprising:
- an implantable drug delivery module which comprisesa plurality of reservoirs,a release system contained in each of the reservoirs, wherein the release system comprises at least one drug,a plurality of discrete electrically conductive reservoir caps separating the release system from an environment outside of the reservoirs, anda means for disintegrating one or more of the reservoir caps by electrothermal ablation to release the drug from one or more of the reservoirs;
one or more electrodes or sensors for operable engagement with a cardiac tissue of a patient, wherein the one or more electrodes or sensors are useful for cardiac monitoring, cardiac stimulation, or both; and
at least one microcontroller for controlling operational interaction of the drug delivery module and the cardiac electrode or sensor,wherein the means for disintegrating by electrothermal ablation comprises (i) an electrical input lead and an electrical output lead which are in direct physical and electrical connection 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.
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Accused Products
Abstract
Medical device and methods are provided for controlled drug delivery in a cardiac patient. The device includes an implantable drug delivery module comprising reservoirs containing a drug and a control means for selectively releasing an effective amount of drug from each reservoir; one or more electrodes or sensors for cardiac monitoring, stimulation, or both; and a microcontroller for controlling operational interaction of the drug delivery module and the cardiac electrode. The electrodes may comprise ECG monitoring, cardioversion, or cardiac pacing electrodes. A medical device also is provided for controlled delivery of drug to a patient having congestive heart failure, which includes an implantable drug delivery module comprising a natriuretic peptide and a release mechanism for selectively releasing a pharmaceutically effective amount of the natriuretic peptide into the patient; and a microcontroller for controlling the release mechanism, for example, in response to one or more monitored patient parameters.
140 Citations
39 Claims
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1. A medical device for controlled drug delivery in cardiac care in a patient comprising:
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an implantable drug delivery module which comprises a plurality of reservoirs, a release system contained in each of the reservoirs, wherein the release system comprises at least one drug, a plurality of discrete electrically conductive reservoir caps separating the release system from an environment outside of the reservoirs, and a means for disintegrating one or more of the reservoir caps by electrothermal ablation to release the drug from one or more of the reservoirs; one or more electrodes or sensors for operable engagement with a cardiac tissue of a patient, wherein the one or more electrodes or sensors are useful for cardiac monitoring, cardiac stimulation, or both; and at least one microcontroller for controlling operational interaction of the drug delivery module and the cardiac electrode or sensor, wherein the means for disintegrating by electrothermal ablation comprises (i) an electrical input lead and an electrical output lead which are in direct physical and electrical connection 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 (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)
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32. A medical device for drug delivery to a cardiac care patient comprising:
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an implantable drug delivery module which comprises a plurality of reservoirs, a release system contained in each of the reservoirs, wherein the release system comprises at least one drug, a plurality of discrete metal reservoir caps separating the release system from an environment outside of the reservoirs, an electrical input lead and an electrical output lead which are in direct physical and electrical connection to each of the reservoir caps, a power source, and a microcontroller 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, in an amount effective to disintegrate the reservoir cap by electrothermal ablation to release the at least one drug from one or more of the reservoirs; and one or more electrodes or sensors for operable engagement with a cardiac tissue of a patient, wherein the one or more electrodes or sensors are useful for cardiac monitoring, cardiac stimulation, or both.
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33. An implantable medical device comprising:
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a body; at least one reservoir in the body; reservoir contents contained in the at least one reservoir, wherein the reservoir contents comprises a sensor for measuring or analyzing the presence, absence, or change in a chemical or ionic species indicative of cardiac health; an electrically conductive reservoir cap covering the at least one reservoir to separate the reservoir contents from an environment outside of the reservoir; conducting leads to and from the reservoir cap; and a power source and a controller for selectively delivering an electric current through the reservoir cap effective to disintegrate the reservoir cap by electrothermal ablation to release or expose the reservoir contents; wherein the reservoir cap and the conducting leads to and from the reservoir cap are configured to provide, upon the application of electrical current to the conducting leads, an increase in electrical current density in the reservoir cap relative to the current density in the conducting leads to and from the reservoir cap. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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Specification