The aim of this study was an evaluation of the climical usefulness of a new ion-selective electrode for ionized magnesium (iMg
2+). In 36 healthy volunteers (Group-H) and 24 postoperative patients (Group-P), blood levels of iMg
2+ were measured by a Stat Profile 8 Analyzer (NOVA Biomedical, U. S. A.).
In Group-H, the mean level of whole blood iMg
2+ was 0.53±0.04mmol·
l-1 and was higher than that of plasma iMg
2+ obtained immediately after centrifugation. The mean plasma or serum levels of iMg
2+ obtained after centrifugation and preserved at -20°C for one week were lover than those obtained without preservation, respectively. However, when preserved at -80°C, they were not significantly different from those obtained without preservation, respectively.
The mean level of whole blood iMg
2+ in Group-P (0.43±0.07mmol·
l-1) was significantly lower than that in Group-H.
We concluded that an ion-selective electrode for iMg
2+ was useful for investigation of various pathophysiologic processes related to blood iMg
2+ in critically ill patients.
抄録全体を表示