Urea Nitrogen (BUN)

What this laboratory test evaluates

DetailsUrea Nitrogen (BUN) – This test measures the level of urea nitrogen in the blood, a key indicator of kidney and metabolic health. Urea is the main waste product from the breakdown of protein. A BUN test is crucial for diagnosing and managing renal and metabolic disorders. High BUN levels may indicate increased urea production due to a high-protein diet, severe infections, dehydration, heart failure, kidney disease, or blockages in the urinary tract. Low levels might suggest advanced liver disease or overhydration.

What patients is this test right for?This test is particularly useful for individuals showing symptoms of kidney issues or those with conditions affecting their metabolism.

What type of sample is required for this test?1 mL serum. A simple blood draw is needed.

Additional test information

This test measures the level of urea nitrogen in the blood, a key indicator of kidney and metabolic health.

Collection and processing

• Sample type: Serum
• 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.