Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1997-06-24
1999-09-14
Smith, Ruth S.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
424 93, A61B 5055
Patent
active
059514736
ABSTRACT:
New methods for rapid, noninvasive determination of sodium ion in vivo are described. The methods are useful for assessing liver and other organ injury based on a nuclear magnetic resonance determination of intracellular and extracellular sodium in the damaged tissue. A shift reagent, TmDOTP.sup.5-, is used in vivo to produce baseline resolved peaks of .sup.23 Na. Excellent results are achieved with significantly less TmDOTP.sup.5- than with other conventional .sup.23 Na shift reagents such as DyTTHA.sup.3-. In contrast to use in isolated perfused heart tissue, TmDOTP.sup.5- solutions are employed in vivo without added calcium ion. The method has been applied to animal burn models. Results show that intracellular sodium ion levels are dramatically increased, thus providing a rapid assessment of liver function. Similar methods may be applied to the determination of intra- and extracellular potassium ion.
REFERENCES:
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Bansal Navin
Malloy Craig R.
Sherry A. Dean
Board of Regents , The University of Texas System
Smith Ruth S.
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