System and method for measuring blood urea nitrogen, blood osmolarity, plasma free hemoglobin and tissue water content
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United States of America Patent
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Jun 12, 2001
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N/A
app pub date -
Feb 24, 1998
filing date -
Feb 1, 1993
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Abstract
Systems and methods are provided for noninvasively measuring the levels of urea, blood osmolarity (or Na.sup.+), plasma free hemoglobin and tissue water content in a patient's blood or tissue. Light of selected wavelengths is passed through blood or body tissue and the transmitted or reflected light is detected and the detected signals can be electronically compared and manipulated to provide the non-invasive, continuous and quantitative display of a patient's blood urea, blood osmolarity (or Na.sup.+), plasma free hemoglobin and tissue water content.
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