LOW POWER METHODS FOR PRESSURE WAVEFORM SIGNAL SAMPLING USING IMPLANTABLE MEDICAL DEVICES
First Claim
1. A method for operating an implantable medical device (IMD), the method comprising:
- receiving a physiological signal of a patient;
determining a respiration rate of the patient based on the received physiological signal;
determining with a processor located within the IMD a sampling interval based on the determined respiration rate of the patient;
determining a sampling mode based upon system conditions and external inputs, wherein the sampling mode includes one or more operating parameters; and
recording blood pressure measurements of the patient over the sampling interval according to the one or more operating parameters included in the sampling mode.
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Accused Products
Abstract
Systems and methods for reducing power consumption in implantable medical devices (IMDs) in which an IMD implantable in an artery monitors blood pressure. A master device monitors a physiological signal, such as respiratory cycle, and instructs the IMD to take blood pressure measurements over a sampling interval, the duration of which is determined by the master device based on the monitored physiological signal. The master device may determine an end-expiration point of the respiratory cycle and send synchronization information to the IMD to further shorten the sampling interval by coinciding the sampling interval with the end expiration point of the respiratory cycle. The IMD may further conserve power by including processing abilities to collect and/or transmit only a subset of data representing the blood pressure signal, for example, systolic, diastolic, and/or mean blood pressure signal values. The blood pressure readings, once taken, may be transferred to the master device.
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Citations
24 Claims
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1. A method for operating an implantable medical device (IMD), the method comprising:
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receiving a physiological signal of a patient; determining a respiration rate of the patient based on the received physiological signal; determining with a processor located within the IMD a sampling interval based on the determined respiration rate of the patient; determining a sampling mode based upon system conditions and external inputs, wherein the sampling mode includes one or more operating parameters; and recording blood pressure measurements of the patient over the sampling interval according to the one or more operating parameters included in the sampling mode. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An implantable medical device system with reduced power consumption, the system comprising:
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a master device configured to receive a first physiological signal of a patient, to determine a sampling interval duration based on the first physiological signal, and to send an instruction containing the sampling interval duration; and a slave implantable medical device configured to receive the instruction containing the sampling interval duration, to sense a second physiological signal, and to record one or more data points from the second physiological signal over the sampling interval duration. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method comprising:
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monitoring with an implanted sensor module a physiological signal to determine a respiration rate of a patient; determining with a processor a sampling interval based on the respiration rate of the patient; and recording blood pressure measurements during the sampling interval. - View Dependent Claims (22, 23, 24)
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Specification