Which of the following is a classic sign of "Peritonitis" in a patient undergoing Peritoneal Dialysis?

Appeared in: RML 2023

Explanation

Cloudy or opaque dialysate effluent is the earliest and most reliable sign of peritonitis in patients on peritoneal dialysis.
The cloudiness is caused by an increased number of white blood cells (typically over 100 cells/μL with more than 50% neutrophils) and the presence of bacteria and fibrin in the fluid as the body responds to the infection.
This sign often appears even before other symptoms like fever or severe abdominal pain, making it a critical indicator for early detection.

Option B: Clear amber or straw-colored outflow is the expected appearance of normal, non-infected peritoneal dialysate effluent.
Option C: Slow drainage of fluid typically points to a mechanical or obstructive problem rather than an infection.
Option D: Red-tinged or bloody outflow indicates the presence of blood, not infection. While it needs to be investigated, it is not the classic sign of peritonitis.

Clinical Relevance

Nursing practice connection: Use the key finding related to Signs and symptoms of peritonitis in peritoneal dialysis to guide bedside assessment, documentation, and the next nursing action.
Patient education is a critical nursing responsibility. Nurses must teach patients on peritoneal dialysis to monitor every bag of effluent for clarity and to report any cloudiness, fibrin strands, or unusual color to their nephrology team immediately.
Prompt identification and treatment of peritonitis are essential to preserve the peritoneal membrane for future dialysis, prevent hospitalization, and avoid life-threatening sepsis.
What if the outflow was brown and had a fecal odor? This would suggest a different, but equally urgent, emergency: bowel perforation. This requires immediate cessation of dialysis and emergency surgical consultation.

How to Approach the Question

First, identify the key concepts in the question: 'Peritonitis' and 'Peritoneal Dialysis'.
The question asks for a 'classic sign'. This means you should look for the most common and indicative symptom.
Recall the pathophysiology of peritonitis: it is an infection/inflammation of the peritoneum. An infection leads to an immune response, involving white blood cells.
Evaluate each option based on this understanding:
'Cloudy outflow' directly relates to the presence of white blood cells and bacteria in the dialysate.
'Clear amber outflow' is the normal state, so it's incorrect.

Concept Tested & Keywords

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E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 1674-1676

E6 Medicine Harrison 22e Part 1 p. 1113-1115

Practise the full RML 2023

Attempt every question from this paper in a timed mock, then review the full solution for each one.