Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2008-06-30
2011-12-27
Gedeon, Brian T (Department: 3766)
Surgery
Diagnostic testing
Cardiovascular
C607S022000
Reexamination Certificate
active
08086302
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.
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Gedeon Brian T
Medtronic Inc.
Soldner Michael C.
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