Typically, the patient fasts for ten or twelve hours before the blood is drawn for the test—this is particularly important for getting a useful blood glucose measurement. CMPs are also frequently performed on nonfasting patients, but the glucose level in those cases is not as useful. The following tests are then performed:2
These tests help screen for a wide variety of problems. The glucose test in particular helps screen for diabetes mellitus and pre-diabetes. The calcium test can indicate or monitor bone diseases or diseases of the parathyroid gland or kidneys. Calcium salts, lithium, thiazide diuretics, thyroxine, and vitamin D can all increase levels and may interfere with this test.3
Electrolyte levels and the balance among them are tightly regulated by the body. Both individual values and ratios among the values are significant; abnormalities among either can indicate problems such as an electrolyte disturbance, acid-base imbalance, or kidney dysfunction.
Tests of protein levels in the blood help screen for both kidney and liver disorders.
The National Institutes of Health provides ranges considered within normal limits, though optimal levels may vary by individual.4
Compare also the ranges given at Reference ranges for blood tests.
0.7–1.3 (men)
"Comprehensive Metabolic Panel". Lab Tests Online. 2005-10-31. Retrieved 2008-09-22. http://www.labtestsonline.org/understanding/analytes/cmp/glance.html ↩
"Calcium - blood test". MedlinePlus Medical Encyclopedia. Nlm.nih.gov. 2012-08-27. Retrieved 2012-09-14. https://www.nlm.nih.gov/medlineplus/ency/article/003477.htm ↩
"Comprehensive metabolic panel: MedlinePlus Medical Encyclopedia". NLM.NIH.gov. 2013-01-21. Retrieved 2015-04-29. https://www.nlm.nih.gov/medlineplus/ency/article/003468.htm ↩
"Creatinine blood test: MedlinePlus Medical Encyclopedia". NLM.NIH.gov. 2013-08-04. Retrieved 2015-04-29. https://www.nlm.nih.gov/medlineplus/ency/article/003475.htm ↩