Hydronephrosis is the

Appeared in: RUHS, Jaipur, M.Sc Nursing Entrance Exam-2024

Explanation

Hydronephrosis is defined as the dilation or distension of the renal pelvis and calyces.
This condition is a direct result of an obstruction to the outflow of urine somewhere in the urinary tract.
The backup of urine increases pressure within the kidney, causing the collecting system to swell and expand.
This is a structural change, distinguishing it from other kidney conditions.

Option A: This describes pyelonephritis, which is an inflammation of the kidney tissue and renal pelvis due to bacterial infection.
Option C: This is a literal but medically inaccurate description. The fluid is urine, not just water, and the key pathological feature is the structural distension of the renal pelvis, not simply the presence of fluid.
Option D: This is the direct opposite of what happens in hydronephrosis. The condition is characterized by expansion and dilation due to increased pressure from backed-up urine.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition and pathophysiology of hydronephrosis as background academic context rather than a clinical decision trigger.
Nurses play a key role in monitoring patients for signs of urinary obstruction, such as decreased urine output, flank pain, and hematuria, which can indicate developing hydronephrosis.
Early identification and management of the underlying cause of hydronephrosis are critical to prevent irreversible kidney damage (parenchymal atrophy) and chronic kidney disease.
What if? If the urinary obstruction is complete and bilateral (affecting both kidneys), it becomes a medical emergency. This condition leads to acute kidney injury (AKI) with a rapid decline in renal function, requiring immediate intervention (like a nephrostomy tube) to drain the urine and preserve kidney function.

How to Approach the Question

First, identify the core term in the question: 'Hydronephrosis'.
Break down the term: 'Hydro-' relates to fluid, and '-nephrosis' relates to a condition of the kidney.
Recall the pathophysiology: an obstruction prevents urine from draining, causing it to back up.
Consider the effect of fluid backup in a hollow organ like the renal pelvis. The increased pressure will cause it to swell or distend.
Evaluate the options based on this understanding. 'Distension' accurately describes the swelling, while 'infection' (pyelonephritis) and 'contraction' (the opposite) are incorrect.

Concept Tested & Keywords

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E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 1078-1080

E6 PATHOLOGY QUICK REVIEWBased on Harsh Mohan Textbook of PATHOLOGY p. 212-214

E6 Medicine Davidson Principles Practice 24e p. 450-452

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