Peritoneal Dialysis Patient with Peritonitis: Assessment and Management
Mrs. L, a 52-year-old woman on continuous ambulatory peritoneal dialysis (CAPD) for 2 years, presents to the clinic with a 2-day history of abdominal pain, cloudy peritoneal effluent, and fever (38.5°C). She performs 4 exchanges daily with 2 L of 2.5% dextrose solution. Her last exchange drained cloudy fluid. She reports that she may have accidentally touched the spike connector during her last exchange. Vital signs: BP 110/70 mmHg, HR 102 bpm, RR 22 breaths/min. The peritoneal effluent is sent for cell count, Gram stain, and culture. The nurse must initiate appropriate management and prevent complications.
1. What are the immediate nursing actions and the rationale for each?
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Immediate actions: 1) Obtain a sample of the cloudy effluent for cell count, differential, Gram stain, and culture before starting antibiotics. Rationale: to identify the causative organism and guide therapy; a cell count >100 white blood cells/µL with >50% neutrophils is diagnostic of peritonitis. 2) Initiate empiric intraperitoneal (IP) antibiotics as prescribed, typically a first-generation cephalosporin or vancomycin plus an aminoglycoside or third-generation cephalosporin, after obtaining the sample. Rationale: early treatment reduces morbidity and prevents catheter loss. 3) Perform rapid exchanges (e.g., 1-2 L with 1.5% dextrose, dwell time 1-2 hours) to flush the peritoneal cavity and reduce pain. Rationale: removes inflammatory mediators and bacteria, and reduces glucose absorption. 4) Assess for catheter exit-site infection and tunnel infection. Rationale: these can be the source of peritonitis. 5) Monitor vital signs, pain, and effluent clarity. 6) Educate the patient on proper connection technique and hand hygiene to prevent recurrence. 7) Consider adding IP heparin (500-1000 units/L) if fibrin strands are present to prevent catheter obstruction. Rationale: fibrin can occlude the catheter. The nurse should also ensure the patient is comfortable and provide analgesia as needed.
2. How should the nurse evaluate the patient's response to therapy and determine if catheter removal is necessary?
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Response to therapy is evaluated by: 1) monitoring the effluent cell count after 48-72 hours of antibiotics; a decrease of at least 50% indicates improvement. 2) Resolution of abdominal pain, fever, and cloudy effluent within 3-5 days. 3) Repeat cultures if no improvement. Catheter removal is indicated if: 1) the patient does not improve clinically within 5 days despite appropriate antibiotics; 2) the infection is caused by Pseudomonas, fungi, or mycobacteria; 3) there is persistent exit-site or tunnel infection; 4) there is relapsing peritonitis (same organism within 4 weeks). The nurse should collaborate with the nephrologist and monitor for signs of sepsis or bowel perforation (e.g., severe pain, shock). Additionally, the nurse should assess the patient's ability to continue PD and provide emotional support, as catheter removal may require transition to hemodialysis. Patient education on technique and early reporting of symptoms is crucial to prevent future episodes.