creatinine in urine

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Indications

Reference interval

  • infant: 80-20 mg/kg/day
  • child: 8-22 mg/kg/day
  • adolescent 8-30 mg/kg/day
  • adult male: 14-26 mg/kg/day
  • adult female 11-20 mg/kg/day

Principle

Clinical significance

See creatinine in serum

Increases

Decreases

Specimen

The recommended specimen is 10 uL of diluted urine

Urine Specimens: Collect specimens by standard laboratory procedure. Keep specimens refrigerated until analysis. Dilute each specimen 40-fold with reagent grade water (1 mL patient plus 19mL of water, then take 1 mL of this dilution & add 1 mL of water) before analysis. Multiply results by 40 to obtain the creatinine value. Dynamic range for urine CREA is 0.1 - 16.5 mg/dL.

Minimum sample size is 0.5 mL; with an optimum size of 1.0 mL or larger.

See creatinine in body fluid

More general terms

More specific terms

Additional terms

Component of

Components

References

  1. Kodak Ektachem 700 Analyzer Operator's Manual, Kodak Clinical Products, Rochester, New York.
  2. Kodak Ektachem Slide Package Inserts, Kodak Clinical Products Rochester, New York.
  3. Kodak Ektachem Training Manual, Kodak Clinical Products, Rochester, New York.
  4. Mayo Internal Medicine Board Review, 1998-99, Prakash UBS (ed) Lippincott-Raven, Philadelphia, 1998, pg 620.
  5. Medical Knowledge Self Assessment Program (MKSAP) 11, American College of Physicians, Philadelphia 1998.
  6. Clinical Diagnosis & Management by Laboratory Methods, 19th edition, J.B. Henry (ed), W.B. Saunders Co., Philadelphia, PA. 1996, pg 11.
  7. Prescriber's Letter 9(5):28 2002
  8. Mini Panel of 2 tests: Creatinine, Urine - per volume . Creatinine, Urine - per volume Laboratory Test Directory ARUP: http://www.aruplab.com/guides/ug/tests/0080342.jsp
  9. Mini Panel of 2 tests: Creatinine, Urine - per volume . Creatinine, Urine - per volume Laboratory Test Directory ARUP: http://www.aruplab.com/guides/ug/tests/0092458.jsp

Patient information

creatinine in urine patient information