specific gravity -Physical Examination of Urine

is defined as density of a solution over density of water

Minimum SG after a standard water load should be

SG of urine at night (Nocturia) is

Px deprived of fluid for 24 hours has SG of

Normal SG of random specimen

TEST TO MEASURE SPECIFIC GRAVITY OF URINE

CALIBRATION SOLUTIONS FOR REFRACTOMETER

Distilled water SG

5% NaCl

9% Sucrose

Potassium sulfate

Consists of weighted float attached to a scale that has been calibrated in terms of urine specific gravity
- Less accurate than the other methods.

URINOMETER(Hydrometer)
MAJOR DISADVANTAGE: Requires large volume of urine jQuery110108135174892977572_1499790793932

PROPER USE OF URINOMETER
-Adequate amount of urine(......) is poured into a proper sized container
-Urinometer(.....) is added with a spinning motion
-Reading is taken at the ..... of the urine meniscus

Determines the specific gravity by measuring the refractive index of a specimen

REFRACTOMETER-DISADVANTAGE: Corrections for ..... and ..... are still calculated

REFRACTOMETER-ADVANTAGES: Requires small volume of specimen( .......drops); ..... correction solutions for refractometer