urinespecific
Urine specific gravity (USG) is a measure used to assess the concentration of urine. It compares the density of a urine sample to the density of distilled water, with higher values indicating more solutes and a more concentrated urine.
Measurement: Common methods include refractometry, which measures refractive index and is temperature-compensated, and urinometry, which uses
Normal range: In healthy adults, USG typically ranges from about 1.005 to 1.030; morning urine tends to
Interpretation: Low USG (<1.010) suggests dilute urine due to overhydration, diuretics, or impaired concentrating ability. High
Relation to osmolality and limitations: USG correlates with urine osmolality but is not a direct measure of