Blood flow oxygen measurement system and method
First Claim
Patent Images
1. An apparatus for measuring physiologic tissue perfusion information including:
- a first device utilizing a CW Doppler monitoring method to image cardiac output from the heart to produce a first output indicative of real time blood flow of a patient;
a second device producing a second output indicative of oxygen content of the blood; and
a processor combining said first and said second outputs to produce a third output indicative of tissue perfusion.
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Abstract
An apparatus for measuring physiologic tissues perfusion information including: a first device producing a first output indicative of blood flow of a patient; a second device producing a second output indicative of oxygen content of the blood; and a processor combining said first and said second outputs to produce a third output indicative of tissue perefusion.
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Citations
17 Claims
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1. An apparatus for measuring physiologic tissue perfusion information including:
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a first device utilizing a CW Doppler monitoring method to image cardiac output from the heart to produce a first output indicative of real time blood flow of a patient; a second device producing a second output indicative of oxygen content of the blood; and a processor combining said first and said second outputs to produce a third output indicative of tissue perfusion. - View Dependent Claims (2, 3, 4)
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5. A method of measuring physiologic tissue perfusion information including obtaining a measurement of blood flow of a patient utilizing a CW Doppler monitoring method to image cardiac output from the heart and a measurement of real time blood oxygen content, and combining said measurements to produce an output indicative of tissue perfusion.
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6. A method of creating a tissue perfusion index including:
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(a) obtaining a measurement of blood flow utilizing a CW Doppler monitoring method to image cardiac output from the heart and a measurement of real time blood oxygen content from a patient; (b) combining said measurements to calculate a parameter indicative of tissue perfusion in said patient; (c) repeating steps (a) and (b) on a plurality of patients to obtain a set of calculations of said parameter for said plurality of patients; (d) processing the set of calculated parameters to obtain a statistically averaged index of said parameter for a population. - View Dependent Claims (10, 11)
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7. A method of creating a tissue perfusion index for healthy population including:
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(a) obtaining a measurement of blood flow utilizing a CW Doppler monitoring method to image cardiac output from the heart and a measurement of real time blood oxygen content from a healthy patient; (b) combining said measurements to calculate a parameter indicative of tissue perfusion in said healthy patient; (c) repeating steps (a) and (b) on a plurality of healthy patients to obtain a set of calculations of said parameter for said plurality of patients; (d) processing the set of calculated parameters to obtain a statistically averaged index of said parameter for a healthy population. - View Dependent Claims (12, 15)
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8. A method of creating a tissue perfusion index for a population with a known condition including:
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(a) obtaining a measurement of blood flow utilizing a CW Doppler monitoring method to image cardiac output from the heart and a measurement of real time blood oxygen content from a patient with said known condition; (b) combining said measurements to calculate a parameter indicative of tissue perfusion in said patient; (c) repeating steps (a) and (b) on a plurality of patients with said known condition to obtain a set of calculations of said parameter for said plurality of patients; (d) processing the set of calculated parameters to obtain a statistically averaged index of said parameter for a population with said known condition. - View Dependent Claims (13, 16)
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9. A method of diagnosing a condition in a patient including
(a) obtaining a measurement of blood flow utilizing a CW Doppler monitoring method to image cardiac output from the heart to produce and a measurement of real time blood oxygen content from a patient; -
(b) combining said measurements to calculate a parameter indicative of tissue perfusion in said patient; (c) comparing said calculated parameter with a statistically averaged index of said parameter to determine the extent to which said condition exists within said patient. - View Dependent Claims (14, 17)
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Specification