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Urine – Specific Gravity

Urinary specific gravity (SG) is a measure of the concentration of solutes in the urine. It measures the ratio of urine density compared with water density and provides information on the kidney’s ability to concentrate urine. A urinary specific gravity measurement is a routine part of urinalysis.

Sample Required:

The random urine sample can be taken.

Why Get Tested:

  • Urine analysis is part of the routine diagnostic profile.
  • This gives an idea about the kidney Diseases.
  • This also gives an idea about the hydration status.

Normal Values:

  • 1.005 to 1.030

Increased specific gravity is seen in:

  • Dehydration.
  • Decreased renal blood flow.
  • Diabetes mellitus.
  • Excessive water loss in fever, vomiting, and diarrhea.
  • Toxemia of pregnancy.
  • Congestive heart failure.
  • Proteinuria.
  • water restriction.

Decreased specific gravity is seen in:

  • Diabetes insipidus.
  • Early chronic failure.
  • Severe renal damage.
  • Hypertension.
  • Overhydration.
  • Diuresis.

Test Procedure:

A technician may use dipstick method. The dipstick will change color according to the content of the urine.

Specific Gravity

Possible References Used

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