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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Does Elevated Urine Creatinine Level Indicate?

Hi, I tested at a 1.57 creatinine level and my doctor had me return to the lab and the second test had a level of 1.84 (blood). He immediately made an appointment with the nephrology department. My urine creatinine is 35.4 and was part of the 2nd lab visit. I am 52, 160 lbs. and believe myself to be in good health, I have high blood pressure but it is well controlled. Should I be concerned? Is my doctor being cautious or are those numbers alarming? I understand the blood test range tops out at 140 so test 2 is welll above that. I appreciate and look forward to an feedback. Thank you in advance.
Tue, 29 Dec 2015
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Radiologist,  's  Response
Hi,
Thanks for writing in.

The creatinine level in blood shows the ability of the kidney to help in filtration of blood. The normal creatinine level in blood is less than 1.3 in most clinics. If your creatinine level in blood is 1.84 then it is increased. This can mean that the kidney filtration rate has decreased with time. A nephrologist is the specialist in kidney disease and they will evaualte kidney function in detail and suggest investigations like urinary protein, creatinine clearance and if required then a nuclear scan based on your clinical symptoms and medical history.

Occasionally food habits can cause increase in blood creatinine level and this is to be discussed. Research shows an increase in serum creatinine can result from increased ingestion of cooked meat (which contains creatinine converted from creatine by the heat from cooking) or increased intake of protein and creatine supplements, in excess of the recommended dosage and therefore requires you to talk to your doctor. Please do not worry.
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What Does Elevated Urine Creatinine Level Indicate?

Hi, Thanks for writing in. The creatinine level in blood shows the ability of the kidney to help in filtration of blood. The normal creatinine level in blood is less than 1.3 in most clinics. If your creatinine level in blood is 1.84 then it is increased. This can mean that the kidney filtration rate has decreased with time. A nephrologist is the specialist in kidney disease and they will evaualte kidney function in detail and suggest investigations like urinary protein, creatinine clearance and if required then a nuclear scan based on your clinical symptoms and medical history. Occasionally food habits can cause increase in blood creatinine level and this is to be discussed. Research shows an increase in serum creatinine can result from increased ingestion of cooked meat (which contains creatinine converted from creatine by the heat from cooking) or increased intake of protein and creatine supplements, in excess of the recommended dosage and therefore requires you to talk to your doctor. Please do not worry.