Cardiac signal sensor control based on perfusion sensing
First Claim
1. A method comprising:
- receiving an electrical signal from an optical perfusion sensor, wherein the electrical signal is indicative of blood oxygen saturation of tissue of a patient; and
modifying an operation of a cardiac signal sensing module that senses electrical activity of a heart of the patient based on a perfusion value that is based on the electrical signal, wherein modifying the operation of the cardiac signal sensing module comprises activating the cardiac signal sensing module to sense electrical activity of the heart.
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Abstract
An optical perfusion sensor may monitor blood oxygen saturation of blood-perfused tissue, which may be referred to as tissue perfusion, until a tissue perfusion value is within a threshold range of a reference value, and, in some examples, for at least a minimum period of time. The tissue perfusion value may indicate an absolute blood oxygen saturation level or a relative change in blood oxygen saturation level. The reference value may be, for example, determined by an optical oxygenation (O2) variation index that indicates a change in blood oxygen saturation of tissue. In some examples, an operation of a cardiac signal sensing module may be controlled based upon detecting a threshold change in tissue perfusion. For example, the cardiac signal sensing module may be activated upon detecting a threshold change in tissue perfusion.
33 Citations
26 Claims
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1. A method comprising:
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receiving an electrical signal from an optical perfusion sensor, wherein the electrical signal is indicative of blood oxygen saturation of tissue of a patient; and modifying an operation of a cardiac signal sensing module that senses electrical activity of a heart of the patient based on a perfusion value that is based on the electrical signal, wherein modifying the operation of the cardiac signal sensing module comprises activating the cardiac signal sensing module to sense electrical activity of the heart. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system comprising:
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an optical perfusion sensing module that is configured to generate a first electrical signal indicative of a blood oxygen saturation level of a patient; a cardiac signal sensing module that is configured to generate a second electrical signal indicative of electrical activity of a heart of the patient; and a processor that is configured to receive the first electrical signal from the optical perfusion sensing module, and modify an operation of the cardiac signal sensing module based on a perfusion value that is based on the first electrical signal from the optical perfusion sensing module, wherein the processor is configured to modify the operation of the cardiac signal sensing module by at least activating the cardiac signal sensing module to sense electrical activity of the heart. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A system comprising:
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means for receiving an electrical signal from an optical perfusion sensor, wherein the electrical signal is indicative of blood oxygen saturation of tissue of a patient; and means for modifying an operation of a cardiac signal sensing module that senses electrical activity of a heart of the patient based on a perfusion value that is based on the electrical signal, wherein the means for modifying modifies an operation of the cardiac signal sensing module by at least activating the cardiac signal sensing module to sense electrical activity of the heart.
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26. A computer-readable medium comprising instructions that cause a programmable processor to:
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receive an electrical signal from an optical perfusion sensor, wherein the electrical signal is indicative of blood oxygen saturation of tissue of a patient; and modify an operation of a cardiac signal sensing module that senses electrical activity of a heart of the patient based on a perfusion value that is based on the electrical signal, wherein the instructions cause the programmable processor to modify the operation of the cardiac signal sensing module by at least activating the cardiac signal sensing module to sense electrical activity of the heart.
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Specification