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Doctor insights on: 24 Hour Urine Creatinine Calculation

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Is 3822.00 mmol/l normal 24- hour urine creatinine? Is 200.1ug/24h normal cortisol level for 24 hour urine test?

Is 3822.00 mmol/l normal 24- hour urine creatinine? Is 200.1ug/24h normal cortisol level for 24 hour urine test?

See below: Normal urine creatinine (24-hour sample) values range from 7-21 mmol/day (males) and 5-16 mmol/day (females). Results depend greatly on your age and amount of lean body mass.

Normal urine 'free' cortisol (24-hour sample) is usually less than 50 ug (=mcg). ...Read more

Urine (Definition)

Urine is the product of the kidneys, which is produced to eliminate the waste products of metabolism, manage body fluid balance, &maintain acid-base balance. The blood is first filtered by the kidneys, and the composition of the resulting fluid is then altered depending on the body's needs. It is composed of mostly water, and breakdown products from blood cells impart ...Read more


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Why is creatinine measured in a 24 hour urine collection?

Why is creatinine measured in a 24 hour urine collection?

Tell kidney function: Single urine specimens can be tested for creatinine. But daily urine output and urinary concentration varies hence a 24 hr urine collection. Normal creatinine output for an adult should be >1gm/24 hours. Also getting blood creatinine provides optimal way to accurately determine creatine clearance which in turn is a most accurate way to measure kidney function. ...Read more

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Creatinine was 1.15 then 2 months later 24 hour urine was normal?

Creatinine was 1.15 then 2 months later 24 hour urine was normal?

Likely no problem.: Your creatinine is within normal range (< 1.5 mg/dl). Normal ranges can vary, but this is well within many. Your 24 urine was normal, which likely means your kidneys are working properly and you likely don't have any diseases, like diabetes, etc. That cause abnormal amounts of urine to be produced. ...Read more

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My aunt had cll, & I have a tiny IgM kappa monoclonal in beta2, 24 hour urine has elevate creatinine, elevated crp. What's going on?

Need work-up: You should see a hematologist/oncologist and have some work-up done- some blood works and a bone marrow biopsy would be important. There are different conditions that can cause monoclonal protein- and this needs to be investigated further. ...Read more

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Is a urine creatinine level of 2.04 mmol/L worrysome?

No: Creatinine in the urine is measured only to compare with other substances -- it's an estimate of whether your urine is concentrated or dilute. You may have drunk an extra glass of water. ...Read more

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What causes your urine creatinine to be high in the morning?

What causes your urine creatinine to be high in the morning?

Concentration: Morning urine is usually more concentrated and all urine contents are at a higher level in the morning urine. ...Read more

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I have low urine creatinine at 2.2 mmol/L. What could this mean?

Absolutely nothing: You're probably not a female bodybuilder and you drank a little extra water. I'm glad I could reassure you. ...Read more

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Why might it be that we use urine creatinine when caclucating GFR?

Not reabsorbed: Creatinine is used to calculate glomerular filtration rates because the kidney does not reabsorb it: whatever gets filtered into the glomerulus ends up in the urine. So it is a reliable indicator of how much blood has been filtered. All you have to calculate is the volume of blood that contained the amount of creatinine that appeared in the urine over a certain time. ...Read more

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Why would my blood creatinine be low and my urine creatinine be high?

Why would my blood creatinine be low and my urine creatinine be high?

Strong kidneys!: It sounds like your kidneys are working normally. That's what they're supposed to do -- clear metabolic products like creatinine from the blood, dumping it into the urine. The urine level might be especially high if you haven't been drinking lots of fluids lately, i.e. if the urine is relatively concentrated. In any case, this is a good sign, nothing to worry about. ...Read more

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Can eating lots of food like protein cause high urine creatinine?

Can eating lots of food like protein cause high urine creatinine?

Muscle is muscle: There is a trace amount of creatine and creatinine in muscle meats which contributes slightly to urine creatinine, but most of it comes from the production of creatine in your own muscle. Creatine is used for short term storage of energy as creatine phosphate and some leaks out of your muscles every day. After a loading dose of 25 g per day for a week, 5 g creatine per day helps muscles work. ...Read more

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Should I be concerned about urine creatinine levels over 165 mg/dl and high protein levels?

Should I be concerned about urine creatinine levels over 165 mg/dl and high protein levels?

Depends: It depends how high the protein levels are when they were checked. High urine protein levels are often a marker of kidney disease. High blood protein levels can be seen in multiple myeloma. This is concerning, and I would ask your physician for additional information. ...Read more

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My urine creatinine was 20 when 4 months ago it was 73, my BUN level was 7. What could be causing this?

This means nothing: Urine creatinine varies with your hydration. You excrete a certain amount daily depending mostly on your muscle mass. Drink twice as much water, and you cut your creatinine in half. It's worth measuring only as a standard against which to compare other elements measured in your urine. A "low BUN" means nothing. You're not a kidney patient. I'm sorry no one explained this to you. ...Read more

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What means an urine-to plasma creatinine ratio > 200? My urine creatinine was 171mg/dl, serum creatinine 0.8mg/dl, ratio:213.

What means an urine-to plasma creatinine ratio > 200? My urine creatinine was 171mg/dl, serum creatinine 0.8mg/dl, ratio:213.

Nothing: This is a meaningless number that is primarily a function of how much water you were drinking. It's used to help calculate other labs. ...Read more

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Kindly interpret: my random urine albumin: less than 5.0 mg/l, random urine creatinine: less than 15.0 mg/dl. What is my albuminl:creatinine ratio?

Check again.: These readings seem more like those in serum although they are far below normal levels for Albumin and above normal for creatinine. The normal levels are 3.5-5.0 g/dl and <1.5 mg/dl for serum Albumin and creatinine respectively. The urine protein levels are <150 mg/day and creatinine is 1.0-1.6 g/day. The normal range of urine output is 0.4-3.0 l/day. These are low normal at most so recheck. ...Read more

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What is a normal urine creatinine level?

No such thing: We don't publish a reference range as people would worry. The more muscle mass you have, the more creatinine you put out daily. The level in turn is also a function of how much water you drink -- whether the urine is concentrated or dilute. And there's no illness for which increased or decreased production is a marker. If you do find a published range, ignore it. ...Read more

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What does high urine creatinine of 390.1mg/dl mean but everything else is normal?

What does high urine creatinine of 390.1mg/dl mean but everything else is normal?

Dehydration: It appears that you may have dehyrdated cauisng hypernatremic (hypertonic) dehydration. This occurs when the lost fluid contains less sodium than the blood (loss of hypotonic fluid). Relatively less sodium than water is lost. Please be sure blood glucose, sodium and chloride levels were normal. I would see your doctor and have the urine test repeated along with a urinary sodium level. ...Read more

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What does it mean when random urine creatinine is high?

This is normal: Creatinine is normally excreted in the urine. The concentration of creatinine by itself means nothing other than the kidneys are doing their job.

Blood creatinine will tell you better how well the kidneys are working. ...Read more

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What is the definition or description of: random urine creatinine?

See below: On a random spot, unlke on a 24 hour urine collection, urine sample, urine creatinine excretion is measured. ...Read more

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What does it mean when vma random urine creatinine is high?

C prior answers: The random urine creatinine can give an approximation of urine function. Vma. .. Perhaps you are referring here to chemical in the urine when, if high, may indicate an tumor known as pheochromocytoma, which is benign, but produces a substance which can cause huge increases in blood pressure, that can have serious consequences. ...Read more

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I had a 24hour urine creatinine test cancelled. Reason given on report was "antigen positive". What does this mean?

I had a 24hour urine creatinine test cancelled. Reason given on report was "antigen positive". What does this mean?

Uncertain: This is an unusual/uncommon reason for cancelling a 24-hour urine creatinine test that I have not seen before. There are a variety of medications that can potentially affect this test but reason for "antigen positive" is unknown to me. I would suggest contacting your ordering physician (or lab) so as to get an explanation. ...Read more

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Why is it so hard to find out normal urine creatinine and calcium levels for a 5 yr old if 3, 3 creatinine, 2.4 calcium. What is norm? Shud I worry?

Why is it so hard to find out normal urine creatinine and calcium levels for a 5 yr old if 3, 3 creatinine, 2.4 calcium. What is norm? Shud I worry?

Worthless number: The total creatinine put out varies primarily with the total mass of skeletal muscle. You'll never find a "normal" value for either. The concentration is even more variable as it depends on how much water was drunk. The urine creatinine is measured only as something to compare with a semi-constant, the creatinine. People aren't numbers, and we do a disservice focusing on labs apart from history. ...Read more

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Urine creatinine 24hour is 18.5 (7.1-17.7mmol/d) and my urine protein 24hour is 0.14 (<0.15g/d), I have IgM k monocloncal protein in b2 what is this?

Stop worrying: Reference ranges are where most people fall; there's no reason at all to get upset about a trivially high creatinine on a test that is done only to make a ratio with the albumin, which seems quite normal, thanks. My own guess is that your physician is eager to reassure you, and i'd urge you to accept this. There's much good in your life & future -- keep your eyes there. ...Read more

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I'm a 43 year old man and my urine creatinine was measured at 42.4 mmol/L. Is it in safe range?

Yes: Urine creatinine means nothing in any case. It's secreted at a constant rate in proportion to your muscularity. It's merely a reference value to which you compare other analytes. ...Read more

Dr. Madhu Kandarpa
2,220 Doctors shared insights

Creatinine (Definition)

Creatinine is a byproduct of creatine phosphate, which is present in muscles. Creatinine levels increase if the ...Read more