Management of Perforated Appendicitis
For perforated appendicitis, perform laparoscopic appendectomy with preoperative broad-spectrum antibiotics, followed by 3-5 days of postoperative antibiotics if adequate source control is achieved, and avoid routine prophylactic drainage. 1, 2
Surgical Approach
Laparoscopic appendectomy is the preferred surgical technique for perforated appendicitis. Recent systematic review data demonstrates that laparoscopic approach results in:
- Shorter hospital stays (4-9.2 days vs 6-10.5 days for open)
- Lower overall complication rates (8.3-18.8% vs 12.5-26.8%)
- Reduced organ-space infections when performed immediately rather than delayed 3
Perform immediate appendectomy rather than delayed surgery - this approach achieves fewer organ-space infections (14.0% vs 23.8%), shorter hospital stay (3.1 vs 9.4 days), and lower drain utilization 3, 4.
Antibiotic Management
Preoperative Antibiotics
Administer a single dose of broad-spectrum antibiotics 0-60 minutes before surgical incision. This effectively decreases wound infections and intra-abdominal abscesses regardless of appendix pathology 1.
Postoperative Antibiotics
Limit postoperative antibiotics to 3-5 days maximum when adequate source control is achieved 1, 2. Key evidence:
- A 24-hour course is non-inferior to extended therapy for complications but significantly reduces hospital length of stay 1
- Meta-analysis of >2,000 patients showed no benefit beyond 5 days 1
- Discontinuation should be based on clinical improvement (tolerating regular diet, clinically improved, normal CBC) rather than arbitrary time periods 4
Antibiotic Selection
For adults: Use broad-spectrum coverage against enteric gram-negatives and anaerobes (E. coli, Bacteroides):
- Piperacillin-tazobactam
- Ampicillin-sulbactam
- Ticarcillin-clavulanate
- Imipenem-cilastatin 1
For pediatrics: Ceftriaxone plus metronidazole provides once-daily dosing with equivalent efficacy to traditional triple therapy (ampicillin-gentamicin-clindamycin), faster defervescence, and substantial cost savings 5.
Oral antibiotics are equally effective as IV for outpatient continuation - conversion to oral therapy after initial clinical improvement is safe, cost-effective (saving ~$4,000/patient), and does not increase abscess rates 6.
Drainage Considerations
Do not place prophylactic drains routinely - prophylactic drainage does not reduce abscess formation and is associated with increased complications and longer hospital stays 3.
If drains are placed, remove them early - early drain removal after laparoscopic appendectomy reduces morbidity (3.4% vs 17.9%) without increasing abscess risk 1.
Management of Periappendiceal Abscess
For abscesses ≥3 cm: Percutaneous drainage with antibiotics is superior to antibiotics alone, resulting in:
- Shorter hospital stay (mean difference 6.4 days)
- Lower recurrence rates
- Ability to avoid appendectomy in 64% of patients during follow-up 7
Special Population Considerations
Patients ≥40 Years Old
After non-operative management of complicated appendicitis, perform both:
- Colonoscopy for colonic screening
- Interval full-dose contrast-enhanced CT scan This is critical because appendicular neoplasm incidence is 3-17% in this age group 1.
Interval Appendectomy
Do not perform routine interval appendectomy in patients <40 years old after successful non-operative management. Reserve interval appendectomy only for those with recurrent symptoms 1, 2.
Common Pitfalls to Avoid
- Prolonging antibiotics beyond 5 days - No evidence supports this and it increases costs, resistance, and hospital stay
- Routine prophylactic drainage - This increases complications without benefit
- Delaying surgery for "optimization" - Immediate surgery has better outcomes than delayed approach
- Skipping cancer screening in older adults - Missing occult malignancy is a significant risk after non-operative management
- Sending patients home on IV antibiotics - Oral conversion is equally effective and dramatically more cost-effective