Which urine specific gravity value is typical in postrenal disease?

Prepare for the Adult-Gerontology Acute Care Nurse Practitioner Test. Study with interactive quizzes and detailed explanations. Boost your exam readiness with our diverse question formats and in-depth content coverage.

Multiple Choice

Which urine specific gravity value is typical in postrenal disease?

Explanation:
Urine specific gravity shows how well the kidneys can concentrate urine. In postrenal obstruction, backpressure from the blockage damages the renal tubules and impairs concentrating ability, leading to isosthenuria—a urine that is poorly concentrated. That pattern corresponds to a low specific gravity, typically around 1.010–1.012, i.e., below 1.015. Values above 1.020 or 1.030 indicate more concentrated urine, which is not characteristic of postrenal obstruction. So a value less than 1.015 best fits the postrenal pattern.

Urine specific gravity shows how well the kidneys can concentrate urine. In postrenal obstruction, backpressure from the blockage damages the renal tubules and impairs concentrating ability, leading to isosthenuria—a urine that is poorly concentrated. That pattern corresponds to a low specific gravity, typically around 1.010–1.012, i.e., below 1.015. Values above 1.020 or 1.030 indicate more concentrated urine, which is not characteristic of postrenal obstruction. So a value less than 1.015 best fits the postrenal pattern.

More practice questions