Method and apparatus to deliver drug and pacing therapy for treatment of cardiac disorders
First Claim
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1. A system, comprising:
- an implantable drug delivery device including;
a drug storage device including a polymeric matrix made of an electrically sensitive polymer having a structure that is electrically controllable by applying an electric field on the electrically sensitive polymer, the structure including an electrically controllable porosity or an electrically controllable binding affinity;
a drug embedded in the polymeric matrix; and
a plurality of electrodes, coupled to the drug storage device, the plurality of electrodes to apply a plurality of electric fields each on a portion of the electrically sensitive polymer and having an individually controllable amplitude; and
an implantable lead including a proximal end including a lead connector providing for a detachable connection to an implantable cardiac rhythm management (CRM) device and a distal end at the implantable drug delivery device, the implantable lead providing for electrical connections between the implantable CRM device and the plurality of electrodes to allow a plurality of drug delivery signals controlling the application of the plurality of electric fields to be delivered from the implantable CRM device to the plurality of electrodes.
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Abstract
A drug delivery system uses an electrically sensitive polymer to store a drug and applies an electric field onto the electrically sensitive polymer for quantitatively and temporally controlled drug delivery. In one embodiment, the drug delivery system is part of a cardiac rhythm management (CRM) system that includes an implantable CRM device and an implantable drug delivery device. The implantable CRM device delivers electrical therapies to a heart and controls the implantable drug delivery device by producing the electrical field with controllable amplitude, frequency, and timing.
47 Citations
19 Claims
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1. A system, comprising:
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an implantable drug delivery device including; a drug storage device including a polymeric matrix made of an electrically sensitive polymer having a structure that is electrically controllable by applying an electric field on the electrically sensitive polymer, the structure including an electrically controllable porosity or an electrically controllable binding affinity; a drug embedded in the polymeric matrix; and a plurality of electrodes, coupled to the drug storage device, the plurality of electrodes to apply a plurality of electric fields each on a portion of the electrically sensitive polymer and having an individually controllable amplitude; and an implantable lead including a proximal end including a lead connector providing for a detachable connection to an implantable cardiac rhythm management (CRM) device and a distal end at the implantable drug delivery device, the implantable lead providing for electrical connections between the implantable CRM device and the plurality of electrodes to allow a plurality of drug delivery signals controlling the application of the plurality of electric fields to be delivered from the implantable CRM device to the plurality of electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification