A nurse is assigned to care for a child suspected of having glomerulonephritis. The nurse reviews the child's record and notes that which finding is associated with the diagnosis of glomerulonephritis?

1. A

   Low blood urea nitrogen

2. B

   Edema

3. C

   Low urinary specific gravity

4. D

   Red brown urine

Appeared in: RAK Nursing Officer - 2019

Explanation

• Red-brown urine is a classic, hallmark sign of acute glomerulonephritis (AGN).
• This distinct discoloration is caused by gross hematuria, which is the presence of a large number of red blood cells in the urine.
• The bleeding originates from the inflamed and damaged glomeruli, which are the tiny filtering units in the kidneys.
• The urine color is often described as 'smoky,' 'tea-colored,' or 'cola-colored' because the red blood cells are altered as they pass through the acidic environment of the nephrons.

Why Other Options Were Wrong

• Option A: In glomerulonephritis, the glomerular filtration rate (GFR) decreases, impairing the kidney's ability to filter waste products from the blood. This leads to the accumulation of urea, resulting in an elevated, not low, blood urea nitrogen (BUN) level.
• Option B: Although edema is a very common and key feature of glomerulonephritis, red-brown urine (hematuria) is a more specific and pathognomonic sign of glomerular damage. Edema is a more general sign that can be present in other renal conditions like nephrotic syndrome or even non-renal conditions like heart failure.
• Option C: In glomerulonephritis, decreased urine output (oliguria) is common. This, combined with the presence of proteins and red blood cells, makes the urine more concentrated, leading to a high urinary specific gravity (typically greater than 1.020).

Related Visual

Clinical Relevance

• Nursing practice connection: Use the key finding related to Clinical manifestations of acute glomerulonephritis in children to guide bedside assessment, documentation, and the next nursing action.
• Nurses must meticulously monitor and document urine color, character, and output in children with suspected kidney disease, as these are vital diagnostic clues and indicators of disease progression or improvement.
• Key nursing priorities for a child with glomerulonephritis include frequent blood pressure monitoring for hypertension, strict intake and output charting, daily weights to track fluid status, and enforcing dietary restrictions (e.g., low sodium, low protein).
• What if? If the child presented with massive proteinuria and severe, pitting edema but only microscopic (not visible) hematuria, the primary diagnosis would more likely be Nephrotic Syndrome, which has a different pathophysiology and management approach.

How to Approach the Question

• First, identify the core concept of the question, which is recognizing the clinical findings of glomerulonephritis in a child.
• Recall the basic pathophysiology: Glomerulonephritis involves inflammation of the glomeruli, the kidney's filters. This inflammation causes damage.
• Think through the consequences of this damage: Damaged filters leak substances they shouldn't (like red blood cells and protein) and fail to remove waste products. The body also retains salt and water.
• Evaluate each option against this pathophysiology: Leaking red blood cells cause red-brown urine (hematuria). Fluid retention causes edema. Failure to filter waste causes high BUN. Reduced urine output leads to concentrated urine with high specific gravity.
• Compare the correct findings. Both edema and red-brown urine are signs. However, red-brown urine is a more specific and hallmark sign of glomerular bleeding, making it the best answer among the choices.

Concept Tested & Keywords

• Concept Tested: Clinical manifestations of acute glomerulonephritis in children.
• Stem keywords: child, glomerulonephritis, finding, diagnosis
• Lead-in keywords: associated with
• Clinical cues: Age/sex group narrows the expected diagnosis, intervention, or normal reference range.
• Negative lead-in flag: false

Question ID

Qtc3HI3luDdS4A10MyKyuu

Copy ID

Reference Book

E6 Ghai Essential Pediatrics(pp 26-904 of 913) p. 489-491

E6 Nelson Textbook of Pediatrics(2024) — Volume 2 p. 993-995