Circuit and method for implantable dual sensor medical electrical lead
First Claim
1. A body implantable dual transducer apparatus comprising:
- a first sensor that senses a first physiologic parameter and provides a first sensor signal when powered by a supply voltage of a first polarity;
a second sensor that senses a second physiologic parameter and provides a second signal when powered by a supply voltage of a second polarity;
a pair of conductors coupled to the first and second sensors;
a control unit that selectively applies the supply voltage of either the first polarity or the second polarity across the pair of conductors; and
switching circuitry that, in response to the supply voltage of the first polarity, provides the supply voltage of the first polarity to the first sensor for generating the first sensor signal, and in response to the supply voltage of the second polarity, provides the supply voltage of the second polarity to the second sensor for generating the second sensor signal, the first and second sensor signals being transmitted to the control unit using the pair of conductors wherein at least one of the sensors senses a plurality of different physiological parameters.
1 Assignment
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Accused Products
Abstract
An implantable dual transducer apparatus for use with an implantable medical device and control method are disclosed. The dual transducer assembly includes two physiologic sensors coupled to the medical device via a pair of lead conductors. Switching circuitry is controlled by the medical device to selectively activate and deactivate the two physiologic sensors by application of a supply voltage of an appropriate polarity. Each sensor of the dual transducer assembly is connected to the pair of lead conductors through a respective power switch. In response to the polarity of the supply voltage applied to the lead conductors, the power switches activate or deactivate their respective sensor in an alternating manner. Selective activation of one of the sensor while concurrently deactivating the other sensor of the dual transducer assembly provides for reduced power consumption and reliable communication of sensor data and other information transmitted over the pair of lead conductors. The power switches may be constructed using diodes, including discrete or substrate diodes, or transistors, such as n-channel and p-channel transistors. A wide variety of physiologic sensors may be incorporated into the dual transducer assembly.
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Citations
28 Claims
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1. A body implantable dual transducer apparatus comprising:
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a first sensor that senses a first physiologic parameter and provides a first sensor signal when powered by a supply voltage of a first polarity; a second sensor that senses a second physiologic parameter and provides a second signal when powered by a supply voltage of a second polarity; a pair of conductors coupled to the first and second sensors; a control unit that selectively applies the supply voltage of either the first polarity or the second polarity across the pair of conductors; and switching circuitry that, in response to the supply voltage of the first polarity, provides the supply voltage of the first polarity to the first sensor for generating the first sensor signal, and in response to the supply voltage of the second polarity, provides the supply voltage of the second polarity to the second sensor for generating the second sensor signal, the first and second sensor signals being transmitted to the control unit using the pair of conductors wherein at least one of the sensors senses a plurality of different physiological parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A body implantable dual transducer apparatus, the apparatus comprising:
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a control unit that selectively supplies a control signal of a first polarity or a control signal of a second polarity; a first sensor that senses a first physiologic parameter; a second sensor that senses a second physiologic parameter; a pair of conductors coupled to the first and second sensors and to the control unit; and switching circuitry coupled to the control unit that selectively activates one of the first or second sensors and deactivates the other one of the first or second sensors in response to control signals of the first and second polarities produced by the control device wherein at least one of the sensors senses a plurality of different physiological parameters. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A method of controlling a body implantable dual transducer apparatus including a first sensor that senses a first physiologic parameter and generates a first sensor signal and a second sensor that senses a second physiologic parameter and generates a second sensor signal, the first and second sensors coupled to an implantable medical device via a pair of conductors, the method comprising:
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selectively applying a voltage of either a first polarity or a second polarity across the pair of conductors; providing, in response to the voltage of the first polarity, power to the first sensor for generating the first sensor signal and concurrently removing power from the second sensor; providing, in response to the voltage of the second polarity, power to the second sensor for generating the second sensor signal and concurrently removing power from the first sensor; and transmitting the first and second sensor signals to the control unit using the pair of conductors when power is provided to the first and second sensors, respectively wherein at least one of the sensors senses a plurality of different physiological parameters. - View Dependent Claims (27, 28)
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Specification