Magnesium disturbances in critically ill patients.

Magnesium alterations can have a noticeable effect on the neuromuscular cardiovascular, and metabolic systems. With recent advances in point-of-care testing, it is now easier to monitor for changes in the serum magnesium concentration and implement therapies in the critical care setting. This article reviews the normal homeostatic mechanisms, clinical abnormalities, and therapeutic strategies for magnesium disturbances in critically ill patients.