CARDIAC SIGNAL SENSOR CONTROL
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.
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Accused Products
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.
114 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. - 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 generates a first electrical signal indicative of a blood oxygen saturation level of a patient; a cardiac signal sensing module that generates a second electrical signal indicative of electrical activity of a heart of the patient; and a processor that receives the first electrical signal from the optical perfusion sensing module, and modifies 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. - 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.
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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.
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Specification