HealthDiseases and Conditions

The norm of creatinine in the blood of women and men

Creatinine is a substance that is excreted in every organism and participates in energy metabolism. Creatinine is produced in the muscle tissue, and then enters the blood. The content of it is determined by the volume of muscle mass, so the rate of creatinine in the blood in women is lower than in men, since female representatives predominate fat mass, and not muscle mass.

The amount of creatinine in the blood plasma can not change dramatically due to the fact that the muscle mass is growing quite slowly.

Creatinine in the blood

The average creatinine level in the blood in women is 43-81 μmol / l. The limits of creatinine in men: 63-107 μmol / l; In infants 0-12 months - 46-104 μmol / l; In children from one year to 15 years - 24-62 μmol / l.

Elevated creatinine may be found in people who eat many animal fats and proteins. If the cause is this, then urine and blood creatinine will be elevated simultaneously.

Creatinine can increase with a sharp increase in physical activity, serious muscle injuries, dehydration, kidney failure, radiation sickness, as well as intoxication of the body with antibiotics, barbiturates and other drugs with toxic effects.

Reduced creatinine may be in the first two trimesters of pregnancy, with severe starvation with severe loss of body weight, nutrition solely by plant products, muscle dystrophy, against the background of treatment with certain medications.

Creatinine with urine is excreted by the kidneys. If its content does not meet the standards, you can suspect kidney disease. In acute renal failure and pyelonephritis, creatinine is always elevated and its level continues to grow rapidly.

Creatinine in the urine

Norm: men - 8,7-17,6 mmol; Women: 7.2-15.8 mmol.

With urine, all creatinine should be excreted, about two grams per 24 hours. The rate of creatinine in the blood of women and men is a more accurate indicator compared with the norms of its content in the urine.

When should I take an assay for creatinine?

- People going through the examination for reasons of suspicion of nephrologic diagnoses or having problems with the kidneys are sent for analysis;

- when examining a person for kidney donation;

- in the treatment of drugs that have a toxic effect on the kidneys.

Analysis for creatinine level

The norm of creatinine in the blood of women and men is determined with the help of a sample of Reberg, it also allows you to determine its level in the urine. Before taking these tests, you need to stop taking medications such as cortisol, thyroxine, corticotropin. Preparation for analysis consists in rejecting protein food 10 hours before blood donation.

The examination begins with the fact that the patient drinks half a liter of water and accurately observes the time of urination. After that, after half an hour, blood is drawn from the vein, after another 30 minutes the urinalysis is collected. To ensure that the result was the most reliable, personal data are taken into account: age, height, weight, lifestyle of the patient.

If the level of creatinine is increased, then first of all you need to visit a nephrologist.

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