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US 6,411,832 B1Granted
Method of improving reproducibility of non-invasive measurements
AssigneeOptix LP
InventorHoward E. Guthermann
Life of this patent
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Abstract
A method of improving the accuracy and reproducibility of non-invasive measurements of a concentration of a constituent of interest carried in a body part has been developed. The method relies on elevating the body part during the measurement cycle so that the body part is maintained above the heart during the measurement cycle. Measurements of the constituent during an arterial pulse leads to improved intra-run and run-to-tun determinations.
Claims13
A method for minimizing variations in non-invasive measurements of concentration of a constituent of interest within a body part of a patient, said method comprising the steps of:
- elevating said body part such that it remains at least 6 inches above the heart of the patient during the measurement cycle;
- illuminating said body part with optical radiation;
- measuring radiation transmitted, reflected or transflected from said body part;
- calculating the concentration of said constituent of interest within said body part of said patient from the measured value of radiation.
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