Sensor for edema
First Claim
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1. A system comprising:
- a first device including a first electrode and a second electrode, at least a portion of which is adapted to reside in a body of a subject, wherein the first device is configured to measure a physiological first parameter, the first device including an energy collection unit coupled to the first and second electrodes; and
an implantable second device physically separate from and unattached to the first device, the second device configured to issue cardiac pacing pulses, wherein the energy collection unit of the first device is configured to aggregate energy collected from the cardiac pacing pulses by the first and second electrodes over two or more cardiac cycles, wherein the measurement of the physiological first parameter is a function of a quantity of the energy aggregated over the cardiac cycles.
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Abstract
A sensor is located within the body of a subject, such as for capturing pacing pulses transmitted as part of cardiac therapy from an implanted cardiac function management device. Counted pulses may be used to derive the onset of pulmonary edema within the body through pulse characteristics such as frequency and amplitude. The sensor may be anchored within mediastinal pleura or the airway of the body with the ability to communicate wirelessly to one or more other medical devices, such as an implanted cardiac function management device. It may also adjust transmission of the communication to discriminate among multiple sensors. Methods of use are also described.
16 Citations
30 Claims
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1. A system comprising:
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a first device including a first electrode and a second electrode, at least a portion of which is adapted to reside in a body of a subject, wherein the first device is configured to measure a physiological first parameter, the first device including an energy collection unit coupled to the first and second electrodes; and an implantable second device physically separate from and unattached to the first device, the second device configured to issue cardiac pacing pulses, wherein the energy collection unit of the first device is configured to aggregate energy collected from the cardiac pacing pulses by the first and second electrodes over two or more cardiac cycles, wherein the measurement of the physiological first parameter is a function of a quantity of the energy aggregated over the cardiac cycles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method comprising:
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collecting energy using first and second electrodes of a first device, the energy collected from cardiac pacing pulses issued from an implantable second device, the first device being at least partially implanted at a first location within a body of a subject, the first location being different from a location of the second device, wherein the second device is physically separate from and unattached to the first device; aggregating the energy collected from the cardiac pacing pulses over two or more cardiac cycles using an energy collection unit of the first device, the energy collection unit coupled to the first and second electrodes; and measuring a physiological first parameter as a function of a quantity of the energy aggregated over the cardiac cycles. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A system comprising:
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means for collecting energy using a first device, the energy collected from cardiac pacing pulses issued from an implantable second device, the first device being at least partially implanted at a first location within a body of a subject, the first location being different from a location of the second device, wherein the second device is physically separate from and unattached to the first device; means for aggregating the energy collected from the cardiac pacing pulses over two or more cardiac cycles; and means for measuring a physiological first parameter as a function of a quantity of the energy aggregated over the cardiac cycles. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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Specification