Postoperative fever and abdominal pain on day 4
A 64-year-old woman underwent an open right hemicolectomy with primary anastomosis 4 days ago for a T3 colon cancer. She has a history of type 2 diabetes (HbA1c 8.9%) and hypertension. Today she reports increasing abdominal pain, nausea, and feeling 'unwell.' Temperature is 38.6°C, heart rate 118/min, blood pressure 104/62 mmHg, respiratory rate 22/min, SpO2 94% on room air. The abdomen is distended and tender, with guarding in the right lower quadrant; bowel sounds are absent. The surgical drain contains cloudy, foul-smelling fluid. White cell count is 18.2 × 10^9/L, lactate 3.1 mmol/L, and creatinine has risen from 78 to 132 µmol/L since admission.
1. What is your leading diagnosis and how would you confirm it without delaying treatment?
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Leading diagnosis: Anastomotic leak with secondary peritonitis and early sepsis. Supporting features: day 4-5 post-op timing, fever, tachycardia, hypotension, tachypnea, rising lactate, acute kidney injury, absent bowel sounds, localized guarding, and cloudy foul drain output. Diabetes and poor glycemic control increase leak risk.
Confirmation without delay:
- This is a clinical diagnosis; do not wait for imaging to start resuscitation and antibiotics.
- Send blood cultures, drain fluid for culture and sensitivity, and check full blood count, CRP, lactate, renal function, and coagulation.
- Bedside focused assessment (ultrasound if available) can look for free fluid or collection, but CT with IV and oral contrast is the definitive test in a stable patient.
- If the patient is unstable or peritonitic, proceed directly to theater for exploration rather than CT.
Key principle: In a septic post-operative patient with peritonitis, imaging should not delay source control.
2. Outline your initial management in the first 2 hours, including what you would tell the family.
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First 2 hours:
- Resuscitation: Two large-bore IV lines; balanced crystalloid boluses guided by response (e.g., 500 mL aliquots), targeting mean arterial pressure ≥ 65 mmHg; urinary catheter for output monitoring; consider vasopressors if hypotension persists after fluids.
- Antibiotics: Broad-spectrum cover for gram-negative and anaerobic organisms (e.g., piperacillin-tazobactam or a cephalosporin plus metronidazole), within 1 hour, after cultures if this does not cause delay.
- Source control: Urgent surgical review for re-laparotomy, peritoneal lavage, and either repair or takedown of the anastomosis with diversion. This is the definitive treatment.
- Supportive care: Correct electrolytes, monitor lactate trend, tight glycemic control with insulin, VTE prophylaxis once bleeding risk assessed, and consider ICU if vasopressors are needed.
- Documentation: Record the time of recognition, antibiotics, and surgical referral.
Communication with family: Explain that the bowel join has likely leaked, causing infection in the abdomen and early sepsis. State that antibiotics and emergency surgery are needed, that the surgery may involve a temporary stoma, and that the situation is serious but treatable. Be honest about uncertainty and the possibility of ICU care. Use clear language, allow questions, and document the discussion.