Prioritized multicomplexor sensing circuit
First Claim
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1. A medical device for monitoring patient comprising:
- a plurality of sensors operatively connected to a medical device and implantable within a patient for monitoring patient parameters;
an analog-to-digital converter (ADC) located within the medical device; and
a switching device at least partially located within the medical device and configured to operate in one of a first and a second mode, the switching device separately connecting the ADC to each sensor of the plurality of sensors at least once to complete a switching cycle, the switching device connecting the ADC to each sensor for an initial time increment in each switching cycle when operating in the first mode, the switching device connecting the ADC to a selected one of the sensors for an extended time increment with respect to the other sensors in each switching cycle when operating in the second mode, the extended time increment being longer than the initial time increment.
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Abstract
An implantable medical device having a prioritized multiplexor sensing circuit used for monitoring the condition or status of a patient. The device includes patient parameter sensors, such as electrodes, that are monitored for indications of significant events. Sensors indicating the presence of significant events may then be monitored more often than the other sensors.
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Citations
18 Claims
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1. A medical device for monitoring patient comprising:
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a plurality of sensors operatively connected to a medical device and implantable within a patient for monitoring patient parameters; an analog-to-digital converter (ADC) located within the medical device; and a switching device at least partially located within the medical device and configured to operate in one of a first and a second mode, the switching device separately connecting the ADC to each sensor of the plurality of sensors at least once to complete a switching cycle, the switching device connecting the ADC to each sensor for an initial time increment in each switching cycle when operating in the first mode, the switching device connecting the ADC to a selected one of the sensors for an extended time increment with respect to the other sensors in each switching cycle when operating in the second mode, the extended time increment being longer than the initial time increment. - View Dependent Claims (2, 3, 4)
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5. A computer-readable medium programmed with instructions for monitoring the condition or status of a patient, the medium comprising instructions for causing a programmable processor to:
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separately sample parameters of a patient from a plurality of sensors implanted within the patient, each parameter being sampled at least once to complete a switching cycle, the parameters being sampled in a first mode or a second mode, the parameters sampled an equal number of times in each switching cycle in the first mode, a selected one of the parameters being sampled more times than the other parameters in each switching cycle in the second mode; analyze each sampled parameter to determine whether such sampled parameter meets one or more criteria, the selected one of the parameters being the sampled parameter meeting the one or more criteria; and switch sampling of the parameters from the first mode to the second mode if one of the parameters meets the one or more criteria. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A medical device for monitoring the condition or status of a patient, comprising:
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a plurality of sensors operatively coupled to a medical device and implanted within a patient for monitoring patient parameters; and circuitry at least partially housed within the medical device, including first and second switching devices, and adapted to operate in first and second modes, the first and second switching devices separately connecting to each sensor of the plurality of sensors at least once to complete a switching cycle, the connections to each sensor over the switching cycle occurring for an initial time increment during circuitry operation in the first mode, and the connections to a selected one of the plurality of sensors occurring for an extended time increment during circuitry operation in the second mode, the extended time increment being longer than the initial time increment. - View Dependent Claims (18)
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Specification