Contents
How Doctors Test for Hypomagnesemia
Published: Feb 27, 2024
Testing for hypomagnesemia isn't always straightforward. Discover what doctors look for to diagnose this condition.
Initial Evaluation
The first step in diagnosing hypomagnesemia is a thorough medical history. Doctors look for clues in your lifestyle or medical history that might suggest magnesium loss. If the cause isn't clear, tests help differentiate whether magnesium is lost through the digestive system or the kidneys.
The Tests Involved
Doctors may measure magnesium levels in urine and blood. A 24-hour urine test helps determine if the kidneys are losing magnesium. Another test, fractional excretion of magnesium, calculates how much magnesium is being expelled through urine compared to what's in the blood.
Understanding the Results
Results from these tests help doctors pinpoint the cause of magnesium loss. High urinary magnesium suggests kidney-related issues, while low levels point to digestive losses. These results guide the treatment plan.
Frequently Asked Questions
Blood and urine tests, including fractional excretion of magnesium.
It helps determine if kidneys are losing magnesium.
They suggest magnesium loss through the kidneys.
It indicates digestive system magnesium loss.
Wrapping Up
Testing is key to understanding and treating hypomagnesemia effectively.
References
- al-Ghamdi SM, Cameron EC, Sutton RA. Magnesium deficiency: pathophysiologic and clinical overview. Am J Kidney Dis 1994; 24:737.
- Elisaf M, Panteli K, Theodorou J, Siamopoulos KC. Fractional excretion of magnesium in normal subjects and in patients with hypomagnesemia. Magnes Res 1997; 10:315.
This article has been reviewed for accuracy by one of the licensed medical doctors working for Doctronic. Always discuss health information with your healthcare provider.
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