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Test Findings
 
 

Increased Urine Specific Gravity

 
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Overview

If the urine specific gravity is reduced then this reflects an inability to produce dilute urine. As a result, the urine is excessively concentrated.
  • Causes of Increased Urine Specific Gravity

  • Increased Electrolytes

  • Dehydration - poor intake, GI losses, diuresis
  • Syndrome of inappropriate antidiuretic hormone secretion (SIADH)
  • Adrenal insufficiency
  • Hypervolaemic hyponatraemia - liver cirrhosis, congestive cardiac failure, nephrotic syndrome
  • Other Solutes

  • Glycosurea (diabetes)
  • Proteinuria (e.g. glomerulonephropathy, myeloma)
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