Bus system for interconnecting an implantable medical device with a plurality of sensors
First Claim
1. An apparatus for providing physiologic information to an implantable medical device, comprising:
- a pair of conductors adapted for connection to the medical device; and
a plurality of implantable sensors, each sensor connected to said pair of conductors, each sensor having(a) a current receiving circuit for receiving a current from the medical device over said pair of conductors; and
(b) a signalling circuit for generating and transferring an information signal to said medical device over said pair of conductors, wherein said signalling circuit generates said information signal by controlling a rate at which said current receiving circuit receives said current.
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Accused Products
Abstract
A two-conductor bus system is provided to electrically interconnect a plurality of physiologic sensors to a pacemaker, each sensor being adapted for placement along a pacing lead. The conductors of the bus extend longitudinally through the insulating material of the lead, connecting to each sensor. The pacemaker provides a supply voltage on the bus to provide power to the sensors. The sensors modulate the supply voltage on the bus to transmit information to the pacemaker. This information may be used by the pacemaker to adaptively pace the heart. In one embodiment, the sensors include bus monitoring circuitry for receiving control signals from the pacemaker.
328 Citations
12 Claims
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1. An apparatus for providing physiologic information to an implantable medical device, comprising:
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a pair of conductors adapted for connection to the medical device; and a plurality of implantable sensors, each sensor connected to said pair of conductors, each sensor having (a) a current receiving circuit for receiving a current from the medical device over said pair of conductors; and (b) a signalling circuit for generating and transferring an information signal to said medical device over said pair of conductors, wherein said signalling circuit generates said information signal by controlling a rate at which said current receiving circuit receives said current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for adaptively pacing the heart, comprising:
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a pacemaker; a pacing lead adapted for connection to said pacemaker, said pacing lead having a pair of conductors that extend through at least a portion of said lead, said conductors connecting to said pacemaker when said pacing lead is connected to said pacemaker; and a plurality of physiologic sensors on said lead, each of said sensors connected to both of said conductors, wherein each sensor of said plurality comprises a charge storage circuit for receiving a current from said pacemaker over said pair of conductors and for storing a charge, said charge used to provide power to at least one active sensor component. - View Dependent Claims (10, 11, 12)
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Specification