Ionized or Total Magnesium levels—What Should We Measure in Critically Ill Patients?
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Thu, 9 Jun 2022, 14:00
End
Thu, 9 Jun 2022, 15:00
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Summary
Monitoring and measuring magnesium values are essential to prevent the development of numerous complications in perioperative medicine and critically ill patients. Although current studies suggest that measuring free ionized magnesium (Mg++) is more useful for estimating magnesium status, clinicians often still rely on measurement of total serum magnesium (tMg) to determine if supplemental magnesium is needed. Electrolytes (Na+, K+, Ca++, Cl-) are all currently measured as ions because that is their only clinically active form. Now Mg++ can be measured in the same way. Just as ionized Ca (Ca++) is recognized as the standard for assessing Ca status, Mg++ is now being recognized as vital in assessing magnesium status, especially in critically ill patients. In this webinar we summarize recent literature to describe why it is better to measure Mg++, not tMg, when assessing magnesium status. We will review the significance of Mg++ in different clinical scenarios, and its potential to help improve patient care. We will also discuss whether Mg++ predicts clinical outcome, and the advantages and the difficulties in measuring Mg++ levels in intensive care patients.
A Point of Care Method to Measure Ionized Magnesium
The availability of magnesium ion-selective electrode sensor technology with commercial blood gas analyzers now provides reliable measurement of Mg++ in a clinical setting. Stat Profile Prime Plus measures Mg++ as part of a comprehensive critical menu including pH, gases, electrolytes, glucose, lactate, urea, creatinine, hemoglobin and hematocrit, estimated plasma volume.Educational Credits
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