Skip to content

Piperacillin/Tazobactam Versus Ceftriaxone and Metronidazole for Children With Perforated Appendicitis

Assessing the Longitudinal Outcomes of Piperacillin/Tazobactam Versus Ceftriaxone and Metronidazole for Children With Perforated Appendicitis: A Multicentre Randomized Controlled Trial

Status
Not yet recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07869095
Acronym
ALPACA-MC
Enrollment
180
Registered
2026-10-09
Start date
2027-04-01
Completion date
2031-12-01
Last updated
2026-10-09

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Appendicitis Perforated, Appendectomy, Laparoscopic, Antibiotic, Pediatric, Randomized Controlled Trial

Keywords

Piperacillin, Tazobactam, Ceftriaxone, Metronidazole

Brief summary

The ALPACA-MC trial is a blinded, multicentre randomized controlled trial comparing two postoperative antibiotic treatments for children undergoing laparoscopic appendectomy for perforated appendicitis. Perforated appendicitis occurs when the appendix has developed a hole or has burst. The study will include 180 children from several pediatric hospitals. After surgery, participants will be randomly assigned to receive either piperacillin/tazobactam (PT) or ceftriaxone plus metronidazole (CM). The child, family, healthcare team, and researchers assessing the outcomes will not know which treatment was received. The main purpose of the study is to determine whether PT reduces hospital length of stay compared with CM. The study will also compare other important outcomes, including surgical site infections, the need for additional imaging or procedures, emergency department visits, and hospital readmissions. Children will be followed for 30 days after surgery. At 30 days, families will be contacted to ask about any additional complications and how well the child has recovered. This will include questions about returning to school, sports or other physical activities, and the child's overall health and quality of life. The results of this study will help determine which antibiotic treatment is most appropriate for children with perforated appendicitis and may help guide future clinical practice and antibiotic stewardship.

Interventions

DRUGPiperacillin/Tazobactam

Piperacillin/tazobactam 100 mg/kg IV q8h (to a maximum of 4.5 g IV q8h) and normal saline once daily.

Ceftriaxone 50 mg/kg IV once daily (to a maximum of 2 g IV daily) and metronidazole 10 mg/kg IV q8h (to a maximum of 500 mg IV q8h).

Sponsors

McMaster Children's Hospital
Lead SponsorOTHER
Alberta Children's Hospital
CollaboratorOTHER
Children's Hospital, London Health Sciences Center
CollaboratorUNKNOWN
Montreal Children's Hospital of the MUHC
CollaboratorOTHER
The Hospital for Sick Children
CollaboratorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
0 Weeks to 17 Years
Healthy volunteers
No

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

Design outcomes

Primary

MeasureTime frameDescription
Length of hospital stayMeasured as the number of days from index hospital admission to hospital discharge, assessed up to 30 days.Length of stay in hospital during index admission.

Secondary

MeasureTime frameDescription
Number of participants with deep or organ-space surgical site infectionWithin 30 days of surgery.Number of participants who develop a deep incisional or organ-space surgical site infection following the index appendectomy.
Number of participants requiring post-operative ultrasoundWithin 30 days of surgery.Number of participants who undergo at least one abdominal ultrasound following the index appendectomy.
Number of participants undergoing percutaneous drain insertionWithin 30 days of surgery.Number of participants who undergo percutaneous drain insertion by Interventional Radiology following the index appendectomy.
Number of participants undergoing peripherally inserted central catheter (PICC) insertionWithin 30 days of surgery.Number of participants who undergo insertion of a peripherally inserted central catheter (PICC) following the index appendectomy.
Number of participants receiving parenteral nutritionWithin 30 days of surgery.Number of participants who receive parenteral nutrition following the index appendectomy.
Number of participants with Clostridioides difficile infectionWithin 30 days of surgery.Number of participants who develop laboratory-confirmed Clostridioides difficile infection requiring treatment following the index appendectomy.
Number of participants returning to the emergency departmentWithin 30 days of surgery.Number of participants who return to an emergency department following discharge from the index hospitalization for appendectomy.
Number of participants readmitted to hospitalWithin 30 days of surgery.Number of participants who require hospital readmission following discharge from the index hospitalization for appendectomy.

Contacts

CONTACTMichael Livingston, MD, MSc, FRCSC
livingm@mcmaster.ca905-521-2100

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Oct 11, 2026