Optimal Care of Complicated Appendicitis

This is a single center, prospective study to compare early appendectomy vs. non-operative management of immunocompetent patients with complicated appendicitis, and then to compare interval appendectomy vs. no interval appendectomy in those managed with the initial non-operative approach. Patients who choose early appendectomy will have surgery within 24 hours of diagnosis and be discharged once they are afebrile for 24 hours, have a normal WBC count, and can tolerate a diet. They will be discharged with 5 days of oral ciprofloxacin and metronidazole and follow-up in clinic 2-4 weeks later. Patients who choose non-operative management will receive piperacillin-tazobactam with or without abscess drainage until they are afebrile 24 hours with a normal WBC count and are tolerating a diet, followed by 5 days of oral ciprofloxacin and metronidazole upon discharge. These patients will then be seen in clinic in 2-4 weeks, at which time they will be given the choice of whether or not to undergo interval appendectomy at least 8 weeks from initial presentation. Those in the interval appendectomy group will follow-up one month post-operatively. Patients in both groups will be contacted 3 months and 2 years following initial presentation.

{{{While 40 participants were enrolled as intended, and some data was collected from them, a combination of staff turnover and subsequent resource constraints did not permit the analysis originally intended. Thus, results data is shown comparing the early appendectomy participants against the other two arms combined.}}}}

Inclusion criteria

• At least 1 of the following CT or MRI findings:

• Peri-appendicular abscess
• Extruded appendicolith
• Visible hole in appendiceal wall
• Free peritoneal air

OR

• CT or MRI read with phlegmon or diffuse/extensive inflammation/free fluid plus 1 of 3 of the following (with CT) or 2 of 3 of the following (with MRI) *:

• White blood cell count (WBC) >15
• Peritonitis (involuntary right lower quadrant (RLQ) guarding, + Rovsing sign, percussion tenderness, and/or rebound tenderness)
• Temperature > 38.0 C *>90% specificity for complicated appendicitis based on unpublished institutional data

Exclusion criteria

• Immunocompromized state
• History of major abdominal operation
• Previous appendicitis
• Major comorbidities that preclude safe operation
• Inability to follow-up or appropriately consent
• Pregnant women
• Allergy to penicillin plus any one of the following:

• Hypersensitivity to ciprofloxacin and/or metronidazole
• Pregnant/lactating women
• Patients taking theophylline
• Patient taking tizanidine