Urine Specific Gravity

Why test for 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. The reference range is 1.005-1.030 Conditions associated with a high urine specific gravity include the following : Volume loss (dehydration, vomiting, diarrhea, fever) Hepatorenal syndrome Heart failure Renal artery stenosis Shock Syndrome of inappropriate antidiuretic hormone Conditions associated with a low urine specific gravity include the following : Diabetes insipidus Renal failure Pyelonephritis Glomerulonephritis Psychogenic polydipsia Malignant hypertension