Magnesium, RBC

What this laboratory test evaluates

DetailsMagnesium, RBC – Magnesium is a crucial trace element in our body. This test measures magnesium levels in red blood cells, helping to identify magnesium deficiency, which can lead to irritability, muscle and nerve issues, as well as heart and kidney damage. On the flip side, too much magnesium can depress the central nervous system, leading to muscle weakness, and in severe cases, respiratory and cardiac arrest.

What patients is this test right for?This test is important for individuals showing symptoms of magnesium imbalance.

Low Magnesium Symptoms:• Irritability
• Neuromuscular abnormalities (e.g., cramps, tremors)
• Heart rhythm changes
• Kidney issues

High Magnesium Symptoms:• Central Nervous System depression
• Loss of muscle tone
• Difficulty breathing
• Heart issues

What type of sample is required for this test?0.5 mL packed RBC cells. This can be collected in an EDTA (lavender-top) tube or a sodium heparin (royal blue-top) tube.

Additional test information

This test measures magnesium levels in red blood cells, helping to identify magnesium deficiency, which can lead to irritability, muscle and nerve issues, as well as heart and kidney damage.

Collection and processing

• Sample type: Whole blood
• Fasting: No
• Estimated laboratory processing: Results should be available in 2 – 5 business days after the sample is collected

How Sunridge uses laboratory information

Sunridge considers the medical question, symptoms, history, medications, prior results, and whether the finding could change care before recommending testing. A laboratory result is not interpreted in isolation and does not establish a diagnosis by itself.

Before requesting this test

Availability, collection requirements, eligibility, and processing estimates can change. Sunridge reviews each request and, when appropriate, creates the order through Fullscript. Follow the current instructions supplied with the approved order.