Method to identify tissue oxygenation state by spectrographic analysis
First Claim
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1. A method comprising the steps of:
- i. inserting a distal end of a first photonic needle within myocardium;
ii. emitting light from the distal end of the first photonic needle within the myocardium;
iii. detecting light reflected from the myocardium;
iv. processing the reflected light to measure oxygen saturation of the myocardium;
v. establishing a baseline oxygen saturation level of the myocardium;
vi. repeating the emitting, detecting and processing steps;
vii. wherein when the measured oxygen saturation of the myocardium decreases by more than 15% from the baseline oxygen saturation level, then the myocardium is identified as in need of a corrective intervention that would better protect the myocardium in an ischemic environment; and
viii. wherein providing the corrective intervention includes the step of applying a cardioplegia solution to the myocardium to reduce metabolic activity.
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Abstract
A system and method for identifying metabolic activity within the heart muscle (myocardium). Metabolic activity is determined through spectrographic analysis of the myocardium. More particularly, oxygen saturation of the myocardium is measured through the spectrographic analysis, and metabolic activity is measured by a decrease in oxygen saturation of the myocardium over time.
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18 Claims
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1. A method comprising the steps of:
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i. inserting a distal end of a first photonic needle within myocardium; ii. emitting light from the distal end of the first photonic needle within the myocardium; iii. detecting light reflected from the myocardium; iv. processing the reflected light to measure oxygen saturation of the myocardium; v. establishing a baseline oxygen saturation level of the myocardium; vi. repeating the emitting, detecting and processing steps; vii. wherein when the measured oxygen saturation of the myocardium decreases by more than 15% from the baseline oxygen saturation level, then the myocardium is identified as in need of a corrective intervention that would better protect the myocardium in an ischemic environment; and viii. wherein providing the corrective intervention includes the step of applying a cardioplegia solution to the myocardium to reduce metabolic activity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of measuring oxygen saturation in the myocardium, the method comprising the steps of:
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i. inserting a first photonic needle within the myocardium, wherein the first photonic needle includes a shaft, a first optic fiber extending within the shaft and coupled to a light source, and a second optic fiber extending within the shaft and coupled to a light detector; ii. emitting light from the first optic fiber; iii. collecting light with the second optic fiber; iv. obtaining spectroscopic data from light delivered and collected from the myocardium via the photonic needle; v. processing the spectroscopic data to measure oxygen saturation of the myocardium; vi. determining active myocardial metabolic activity based upon a change in measured oxygen saturation of the myocardium; and vii. wherein when the change in measured oxygen saturation of the myocardium is greater than 15%, then the myocardium is identified as in need of a corrective intervention that would better protect the myocardium in an ischemic environment; and viii. wherein providing the corrective intervention includes the step of applying a cardioplegia solution to the myocardium to reduce metabolic activity. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification