Basic Metabolic Panel (BMP)
Reviewed
Also called: BMP, chemistry panel, chemistry screen, chem 7, electrolyte panel
A basic metabolic panel (BMP) is a blood test that measures eight different substances to check your body's fluid balance, metabolism, and kidney function. It is often used as part of a routine checkup or to help diagnose or monitor conditions like diabetes or kidney disease.
Specimen: blood
Why this test may be ordered
- As part of a regular checkup to screen for health problems before symptoms appear.
- To evaluate general symptoms like fatigue, confusion, breathing problems, or prolonged vomiting.
- In an emergency room setting to quickly assess fluid and electrolyte balance.
- To monitor chronic conditions such as high blood pressure or kidney disease.
Preparation and collection
You may need to fast (not eat or drink) for 8 hours before the test.
A small blood sample is drawn from a vein in your arm.
There is very little risk to having a blood test. You may have slight pain or bruising at the spot where the needle was put in, but most symptoms go away quickly.
Understanding results
A BMP measures eight substances in your blood to provide information about your fluid balance, metabolism, and kidney function. Your healthcare provider will interpret your results in the context of your overall health.
- Normal: All eight substances are within normal ranges, indicating no significant abnormalities in fluid balance, metabolism, or kidney function. Limitation: Normal range depends on the laboratory and your individual factors. A normal result does not rule out all health conditions. Next step: No immediate action needed; continue with routine care as advised by your provider.
- Abnormal (one or more components out of range): One or more results are outside the normal range. This could be a sign of various conditions such as kidney disease, breathing problems, or complications from diabetes. Limitation: These patterns are not diagnostic; additional testing is required to confirm or rule out a specific diagnosis. Next step: Your provider will likely order further tests to investigate the specific abnormality and determine the cause.
- A single abnormal result does not confirm a specific diagnosis; further testing is often needed.
- Results may be affected by recent food or drink intake if you do not fast as instructed.
What to do next
Your healthcare provider will discuss any abnormal results with you and may recommend additional tests to explore the underlying cause.
- What do my specific results indicate about my kidney function, fluid balance, or metabolism?
- Do I need any follow-up tests based on these results?
- How do my symptoms or medical history relate to these results?
Evidence source
U.S. National Library of Medicine: Basic Metabolic Panel (BMP)