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Piperacillin/Tazobactam Versus ceftriAxone and Metronidazole for Children With Perforated Appendicitis (ALPACA)

M

McMaster Children's Hospital

Status and phase

Not yet enrolling
Phase 2

Conditions

Appendicitis Perforated

Treatments

Drug: Metronidazole Injection
Drug: CefTRIAXone Injection
Drug: Piperacillin/tazobactam
Drug: Normal saline

Study type

Interventional

Funder types

Other

Identifiers

NCT05943223
McmasterCH

Details and patient eligibility

About

This study is an internal pilot for a multicenter, blinded randomized controlled trial. The purpose of the multicenter trial is to determine whether post-operative piperacillin/tazobactam is more effective than ceftriaxone and metronidazole for children treated with laparoscopic appendectomy for perforated appendicitis. We plan to conduct an internal pilot study to determine whether a blinded multicenter randomized controlled trial is feasible.

Full description

Acute appendicitis is the most common indication for emergency surgery in children. The management of this condition is typically an urgent laparoscopic appendectomy under general anesthesia. If the appendix is found to be perforated at the time of surgery, then patients need to stay in hospital for intravenous antibiotics. Patients who do not respond to antibiotic therapy experience prolonged length of stay, need for additional procedures (such as percutaneous drain insertion), or other complications. This represents significant morbidity for patients and their families.

Children with perforated appendicitis were previously treated with post-operative ampicillin, gentamicin, and metronidazole (also known as "triple therapy"). In 2008, a randomized controlled trial showed that triple therapy is non-inferior to ceftriaxone and metronidazole (CM) in terms of intra-abdominal abscess formation and wound infection. CM is also less expensive and has a simplified dosing regimen. As such, post-operative CM became the standard of care for perforated appendicitis at most children's hospitals.

In 2021, an open-label RCT suggested that piperacillin/tazobactam (PT) is more effective than CM for children with perforated appendicitis. Patients randomized to PT had a reduced rate of intra-abdominal abscess formation compared to those treated with CM (odds ratio (OR) 4.80, p=0.002). This trial was not blinded and there was no allocation concealment. In contrast, a multicenter, observational study reported no difference in the rate of intra-abdominal abscess formation among patients treated with PT compared to CM. The conflicting results of these two studies add further uncertainty regarding the choice of antibiotics for these patients.

Another factor that should be considered regarding the use of PT versus CM in children with perforated appendicitis is antibiotic stewardship. PT is a broad-spectrum antibiotic with increased effectiveness against Pseudomonas aeruginosa and resistant Escherichia coli. As a result, this medication is often reserved for patients with confirmed Pseudomonas infection, oncology patients with febrile neutropenia, or those who are critically ill and admitted to the intensive care unit.

The current study is an internal pilot for a multicenter, blinded randomized controlled trial. The purpose of the multicenter trial is to determine whether post-operative piperacillin/tazobactam is more effective than ceftriaxone and metronidazole for children treated with laparoscopic appendectomy for perforated appendicitis. We plan to conduct an internal pilot study to determine whether a blinded multicenter randomized controlled trial is feasible.

Enrollment

16 estimated patients

Sex

All

Ages

Under 18 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

  • Laparoscopic appendectomy
  • Perforated appendicitis confirmed intra-operatively (i.e., visible hole in appendix, fecalith found in peritoneal cavity, intra-abdominal abscess, and/or purulent fluid in peritoneal cavity)

Exclusion criteria

  • Non-operative treatment (e.g., due to abscess)
  • Interval laparoscopic appendectomy
  • Conversion to open procedure
  • Non-perforated appendicitis
  • Confirmed or suspected allergy to penicillins or cephalosporins
  • Renal impairment

Trial design

Primary purpose

Treatment

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

Quadruple Blind

16 participants in 2 patient groups

Piperacillin/tazobactam
Experimental group
Treatment:
Drug: Normal saline
Drug: Piperacillin/tazobactam
Ceftriaxone and metronidazole
Active Comparator group
Treatment:
Drug: CefTRIAXone Injection
Drug: Metronidazole Injection

Trial contacts and locations

0

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Central trial contact

Daniel Briatico, MSc; Michael H Livingston, MD, MSc

Data sourced from clinicaltrials.gov

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