Physiological parameter monitoring with minimization of motion artifacts
First Claim
1. A method comprising:
- receiving, with a processor, a first electrical signal from a first optical sensor implanted within a patient;
receiving, with the processor, a second electrical signal from a second optical sensor implanted within the patient;
detecting, with the processor, an arterial pulse of the patient based on a first signal characteristic of the first electrical signal;
detecting, with the processor, a second signal characteristic of the second electrical signal indicative of the arterial pulse; and
determining, with the processor, whether the detected arterial pulse is a spurious pulse based on a time delay between the first and second signal characteristics.
1 Assignment
0 Petitions
Accused Products
Abstract
An implanted system includes at least two optical sensors implanted proximate to an artery of a patient such that one optical sensor is upstream of another optical sensor. Arterial pulses of the patient may be detected based on electrical signals from at least one of the optical sensors. In addition, electrical signals from the optical sensors may be used to minimize the effects of motion artifacts on the detection of arterial pulses. For example, a detected pulse may be determined to be a spurious pulse if the optical sensors indicate the occurrence of the pulse within a predetermined range of time. As another example, a first optical sensor signal may be shifted in time relative to a second optical sensor signal, and the signals may be correlated. An arterial pulse may be detected at a time at which a peak or trough amplitude value of the correlated signal is observed.
21 Citations
43 Claims
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1. A method comprising:
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receiving, with a processor, a first electrical signal from a first optical sensor implanted within a patient; receiving, with the processor, a second electrical signal from a second optical sensor implanted within the patient; detecting, with the processor, an arterial pulse of the patient based on a first signal characteristic of the first electrical signal; detecting, with the processor, a second signal characteristic of the second electrical signal indicative of the arterial pulse; and determining, with the processor, whether the detected arterial pulse is a spurious pulse based on a time delay between the first and second signal characteristics. - 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. An implantable medical system comprising:
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a first optical sensor configured to generate a first electrical signal; a second optical sensor configured to generate a second electrical signal; and a processor configured to receive the first electrical signal and the second electrical signal, detect an arterial pulse of the patient based on a first signal characteristic of the first electrical signal, detect a second signal characteristic of the second electrical signal indicative of the arterial pulse, and determine whether the detected arterial pulse is a spurious pulse based on a time delay between the first and second signal characteristics. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A medical system comprising:
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means for receiving a first electrical signal from a first optical sensor implanted within a patient; means for receiving a second electrical signal from a second optical sensor implanted within the patient; means for detecting an arterial pulse of the patient based on at least one of the first or second electrical signals a first signal characteristic of the first electrical signal; means for detecting a second signal characteristic of the second electrical signal indicative of the arterial pulse; and means for determining whether the detected arterial pulse is a spurious pulse based on a time delay between the first and second signal characteristics. - View Dependent Claims (38, 39, 40, 41)
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42. A method comprising:
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receiving a first electrical signal from a first optical sensor implanted within a patient; receiving a second electrical signal from a second optical sensor implanted within the patient, wherein the first and second optical sensors are positioned relative to each other such that the first optical sensor detects an arterial pulse of the patient before the second optical sensor; detecting a first signal characteristic of the first signal; detecting a second signal characteristic of the second signal; determining whether the first and second signal characteristics occurred within a predetermined range of time; and if the first and second signal characteristics occurred within the predetermined range of time, determining that the first and second signal characteristics are artifacts. - View Dependent Claims (43)
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Specification