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.