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Doctor insights on: Do You Have To Fast For A Cmp Blood Test

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Can a cmp blood test diagnose a disease?

Can a cmp blood test diagnose a disease?

Yes: Complete metabolic panel is usually a screening test but each of the components can provide diagnostic information, e.g., elevated blood glucose could be diagnostic or diabetes. ...Read more

Dr. Jason Reich
206 Doctors shared insights

Comprehensive Metabolic Panel (Definition)

The comprehensive metabolic panel (cmp) is a panel of blood tests that serves as an initial broad medical screening tool. The cmp provides a rough check of kidney function, liver function, and electrolyte and fluid balance. The cmp is an expanded version of the basic metabolic panel (bmp), which does not include liver tests. A cmp (or bmp) is usually ordered as part of ...Read more


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What is a CMP blood test? What would the results tell you about someone

What is a CMP blood test? What would the results tell you about someone

CMP: Comprehensive metabolic profile includes your kidney function liver function and electrolyte profile including sodium potassium and a few others. ...Read more

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I have white small stringy particles in urine. No symptoms but scared something is wrong. Did a CMP blood test and all was normal. What could it be?

Urinalysis: A urine examination would have been more useful than a CMP. Do you have any symptoms? Could it be mucus from your genital tract rather than coming from the urinary bladder?
For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex, if you have sex. ...Read more

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A cmp blood test says albumin/globulin ratio is 2.6 (says normal range is 1-2.1). What is this ratio, and what do results mean? Should I be concerned?

A cmp blood test says albumin/globulin ratio is 2.6 (says normal range is 1-2.1). What is this ratio, and what do results mean? Should I be concerned?

I wouldn't worry: High albumin doesn't occur except in dehydration which also raises globulin, so your total globulin is a bit low overall. Chances are you're one of the folks who makes less in the way of antibodies than other folks, at least right now. This level's no danger to you. These investigations are seldom productive and if you feel well, I'd simply be thankful for good health and keep an eye on it. ...Read more

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Had a cmp blood test done and my bilirubin was 2.1 and range went up to 1.1. Is this ok? All other liver enzymes were perfect. Should I ask for more?

Had a cmp blood test done and my bilirubin was 2.1 and range went up to 1.1. Is this ok? All other liver enzymes were perfect. Should I ask for more?

Gilbert's? Other?: This is relatively common. You want to fractionate the bilirubin into its direct/conjugated & indirect/conjugated. If it is primarily direct, rule out cholestasis from medicine or dubin-johnson/rotor, with normal alk phos other causes unlikely. If has been up in the past like this and there have been no troubles, it like likely gilbert's non-disease, get a reticulocyte count to r/o hemolysis. ...Read more

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What could cause a urine pH of 5.0 consistently with normal cmp blood test!?

What could cause a urine pH of 5.0 consistently with normal cmp blood test!?

That is normal.: Slightly acidic urine is completely normal. Many of the waste products that kidneys get rid of are acidic, and so urine ph usually is also. Normal urin ph ranges from 5.0 to 8.0, with 7.0 being neutral. ...Read more

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Had blood test cmp and CBC with differential. Their normal so would that rule out celiac desiease?

Had blood test cmp and CBC with differential. Their normal so would that rule out celiac desiease?

Not at all: People with CD can have a stable general medical condition with normal CBC & CBC. To test for CD you look for evidence that your body has formed antibodies to your gut. These include Transglutaminase IgA, Gliadin-transglutaminase IgA complex and others. These are often part of a "celiac panel" performed in a larger or specialty lab. If these are high, referral for confirmatory GI testing is common. ...Read more

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Will nicotine usage be shown on a blood test? The tests they're doing are ferritin, cbc, c-sk and cmp

Will nicotine usage be shown on a blood test? The tests they're doing are ferritin, cbc, c-sk and cmp

No: What is c-sk? It is not a name that I am familiar with. However, none of the other tests are designed to measure nicotine or its metabolites. ...Read more

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24hrs since a CBC, CMP, lipid profile blood test Is there something wrong? Or an emergency that I have to come in?

24hrs since a CBC, CMP, lipid profile blood test Is there something wrong? Or an emergency that I have to come in?

Depends: Depends on the policies of the office. I always ask my patients to come in after multiple blood tests so I can sit down with them and explain what was done and what the tests showed - even normal ones. The biggest complaint patients have is that their doctors don't explain adequately. ...Read more

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I regularly donate blood every 2 months. Would this affect blood test results and so which ones? CBC? LFT? CMP? Tbili?

I regularly donate blood every 2 months. Would this affect blood test results and so which ones? CBC? LFT? CMP? Tbili?

Iron: Serum iron and ferritin levels are likely to be affected before any other test results. Do not wait for hemoglobin to drop. If you donate blood regularly, it would be a good idea to take oral iron supplements. ...Read more

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Can menstrual cycle cause low bun on CMP (7 on range Normal: 8-20) & low Lymphs, Abs on CBC (1 on range Normal: 1.2-3.4)? What does null mean on a blood test? Thank you very much for your time.

Can menstrual cycle cause low bun on CMP (7 on range Normal: 8-20) & low Lymphs, Abs on CBC (1 on range Normal: 1.2-3.4)? What does null mean on a blood test? Thank you very much for your time.

See below: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, Your test results do not seem to be a cause for concern. Null=zero
For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex, if you have sex. ...Read more

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My cmp blood test says TSH w/reflex to f4 is 4.44 miu/l (normal range is 0.4-4.5). Do I have hypothyroidism? I have sparse eyebrows on the outer third

Not likely.: Tsh in "normal" range so not technically hypothyroid. Some would argue that TSH should actually be lower.

I would repeat this in a few months. If normal again would stop worrying. If abnormal diagnosis is clear.

In any case eyebrow thinning is not likely due to this tsh. ...Read more

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Is my psychiatrist in the position to demand a blood panel 9? And would the drug appear in urine test or blood test she wrote CBC deff/tsh cmp uds 9

Is my psychiatrist in the position to demand a blood panel 9? And would the drug appear in urine test or blood test she wrote CBC deff/tsh cmp uds 9

Lab work: The doctor ordered CBC with differential (which is blood cells count with count of different cell classes) TSH (which is thyroid stimulating hormone) cmp (which is comprehensive metabolic panel) uds 9 (which is urine drug screen 9-drug panel). All those are routine orders and any psychiatrist would need to know the results to properly assess a patient. There is no reason to suspect of your doctor. ...Read more

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If I have a blood test tomorrow morning and I smoked marijuana tonight would it show up? They're testing hemoglobin, mono, tsh, lyme, cmp, sed rate

If I have a blood test tomorrow morning and I smoked marijuana tonight would it show up? They're testing hemoglobin, mono, tsh, lyme, cmp, sed rate

Probably not: Most drug screening tests are urinalysis. Although blood tests can be done they are much more expensive. It sounds like your labs have been ordered to work up specific symptoms, to better help you physician make a clinical diagnosis. I am very skeptical that a thc level would be included in this type of workup. Hopefully you live in a pot legal state.....Otherwise be careful! ...Read more

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I had a blood test (cbc w/diff, cmp, lipid, thyroid). All were normal (other than slightly low RDW & cholesterol). Feel exhausted often. What next?

I had a blood test (cbc w/diff, cmp, lipid, thyroid). All were normal (other than slightly low RDW & cholesterol). Feel exhausted often. What next?

Further evaluation: There are many common causes of fatigue that have not yet been ruled out. You likely did not get adequate thyroid tests. You might have chronic infections such as lyme disease or viral infections, intestinal parasites, heavy metal toxicity, mold toxicity, corticoadrenal insufficiency, depression, vitamin or mineral deficiencies, sleep apnea, food sensitivities etc. Please see my comment:. ...Read more

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I think I have a stomach virus and I am scheduled for a blood test tomorrow morning (fasting lipid panel, CMP w/EGFR, CPK, PSA). Should I postpone?

I think I have a stomach virus and I am scheduled for a blood test tomorrow morning (fasting lipid panel, CMP w/EGFR, CPK, PSA). Should I postpone?

Should not impact: The tests you listed are not likely to change if not feeling well. Consider the phlebotomist, though and postpone if actively symptomatic so you don't transmit it. ...Read more

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Left flank pain for one month. No injury. Tender to touch. Can't lay on left side. Cmp blood test was good. Psa. 49 dr said probably muscular. Ct scan of abdomen ok. What are other possibilities?

Left flank pain for one month. No injury. Tender to touch. Can't lay on left side. Cmp blood test was good. Psa. 49 dr said probably muscular. Ct scan of abdomen ok. What are other possibilities?

CT scan does not: ...Show the bowels very well. I suspect the pain to be either muscular or coming from your bowels. So if it does not settle down soon, you would be best helped by a gastroenterologist who can check your bowels for any ailments affecting your small or large intestine. ...Read more

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Is a Potassium Blood test result of 5.3 mmol/L and a BUN result of 19mg/dL indicate anything, if all other CBC and CMP results are in range?

Is a Potassium Blood test result of 5.3 mmol/L and a BUN result of 19mg/dL indicate anything, if all other CBC and CMP results are in range?

Check next year: The high potassium may simply be due to a little hemolysis during drawing or transportation. If you feel well otherwise, it's your physician's call whether to repeat it or just text next year. ...Read more

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Does a comprehensive metabolic panel blood test include a test of blood glucose levels?

Does a comprehensive metabolic panel blood test include a test of blood glucose levels?

Yes: Hi. Yes it does. If you have the blood drawn fasting, you have a good way you screen for diabetes (fasting serum glucose). The CMP also measures many other important blood chemistries. To your health! ...Read more

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Which endocrine disorders/problems would a comprehensive metabolic panel blood test NOT detect?

Which endocrine disorders/problems would a comprehensive metabolic panel blood test NOT detect?

All: Comprehensive panel abnormalities could suggest possibility of endocrine disorders or in extreme hyperglycemia detect Diabetics. Thyroid disease, adrenal diseases, etc require specific test ...Read more

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I was wondering does the comprehensive metabolic panel blood test also test for blood sugar levels?

Yes: See this site for a list of the things tested in a CMP.

https://www. Nlm. Nih. Gov/medlineplus/ency/article/003468.htm ...Read more

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How long do you have to fast for a blood test checking for things that acutane effects like triglycerides and cholesterol?

How long do you have to fast for a blood test checking for things that acutane effects like triglycerides and cholesterol?

Fast for 12 hours: Accutane is used to treat acne which is severe and unresponsive to conventional therapies. While it is quite effective, Accutane has numerous side effects. It has been shown to cause transient increases in cholesterol and triglyceride levels which in turn increases one's risk of heart disease, high blood pressure, and more. It is important to check these levels regularly following a 12 hour fast. ...Read more

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I have a blood test tmrw afternoon to check my vitamin d. When do you have to fast for a blood test? I don't have to right? I forgot to ask. Thanks.

I have a blood test tmrw afternoon to check my vitamin d. When do you have to fast for a blood test? I don't have to right? I forgot to ask. Thanks.

Not necessary but...: No, you do not have to fast for this test, but it is wise to not eat much within a couple of hours of any blood test as shortly after a meal your blood will be loaded with triglycerides which reduces the amount of serum available for testing. So I advise either eating a light lunch or waiting about 3 hours after eating- but that is not absolutely essential. ...Read more

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What occurs if I didn't fast before taking a blood test for diabetes?

What occurs if I didn't fast before taking a blood test for diabetes?

High blood glucose: Fasting blood glucose levels are used to make diagnosis of diabetes. If you do not fast, your glucose levels will be higher and you may get labelled as diabetic when you may not have the disease. ...Read more

Cmp (Definition)

Cmp-comprehensive medical profile. This usually includes electrolytes, sodium, potassium, ...Read more