Evaluation of Hypomagnesemia prevalence in the first 24h admission of postoperative Intensive Care Unit

Hypomagnesemia is observed in 15-10% of patients admitted to the hospital and in 40-60% of intensive care units patients. This study was done to investigate the prevalence of hypomagnesemia in patients undergoing elective surgery in the first 24 hours of hospitalization. In this interventional cross-sectional study، 60 patients undergoing elective abdominal surgery with general anesthesia and were admitted to the ICU were selected using simple sampling method. Age، gender، height، weight، body mass index (BMI)، SAPS number، the probability of mortality based on SAPS، sodium، total magnesium، calcium، potassium and plasma phosphorus levels within 24 hours of hospitalization and the total urinary excretion of magnesium in the first 24-hour of hospitalization at ICU was measured and recorded. Independent T and Chi square tests were used for statistical analysis. Serum magnesium، sodium، potassium، calcium and phosphorus and demographic characteristics (age، gender، weight، height and BMI)، did not show any significant correlations with total magnesium deficiency of body after loading of magnesium dosage. Also there was no significant correlation between total magnesium deficiency of body after magnesium dosage loading and the duration of being at ICU. But there was a significant difference in total magnesium deficiency of body after dosage loading of magnesium with expected mortality rate of patients using SAPS parameter (p=0. 013). Magnesium Serum level is an unreliable indicator of hypomagnesemia. The greater the total magnesium deficiency of the body، the worse the prognosis is.