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Complex And Simple Appendicitis: REstrictive or Liberal Post-operative Antibiotic eXposure - UCSF

Complex And Simple Appendicitis: REstrictive or Liberal Post-operative Antibiotic eXposure (CASA RELAX) Using Desirability of Outcome Ranking (DOOR) and Response Adjusted for Duration of Antibiotic Risk (RADAR) -A Randomized Controlled Trial

Status
Terminated
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05966454
Acronym
CASA RELAX
Enrollment
40
Registered
2023-07-28
Start date
2023-06-06
Completion date
2025-07-16
Last updated
2026-06-30

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

Conditions

Appendicitis

Brief summary

The purpose of this study is to demonstrate the safety, efficacy, and feasibility of short-course post-operative antibiotic treatment for simple and complicated appendicitis

Detailed description

This is a single center, randomized controlled trial to determine if decreasing the amount of antibiotics after appendicitis surgery can decrease the risk of adverse effects associated with antibiotics while at the same time ensuring participant safety.

Interventions

DRUGMultiple standard of care antibiotics for appendicitis, at physicians' discretion

Standard of Care Antibiotic use will be restricted to none or up to 24 hours of post-operative antibiotics.

Sponsors

University of California, San Francisco
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

Age ≥ 18 years * Age ≥ 18 years * Planned appendectomy (laparoscopic or open) * Working telephone number or reliable method to contact patient after hospital discharge

Exclusion criteria

* Unable to consent * Pregnant Women * Prisoners * Immunocompromised as determined by clinical team, or patients actively receiving steroids, chemotherapy, or immunosuppressing medications (for example tacrolimus), or patients with active hematologic malignancy affecting the immune system, leukopenia, or end-stage AIDS * Heart failure * Allergy to bupivacaine * Unlikely to comply with treatment or follow-up * Inpatient consultation for appendicitis * Clinically suspected of sepsis based on Sepsis-3 definition * Current use of antibiotics for other indications * Type 1 Diabetes or uncontrolled hyperglycemia * Surgeon preference * Patient preference * Research team unavailable

Design outcomes

Primary

MeasureTime frameDescription
Incidence of Infectious/Antibiotic ComplicationsUp to 30 days after appendicitis surgeryInfectious/antibiotic complication requiring antibiotic treatment only, Emergency Department visit, hospital readmission, percutaneous drainage, and operative intervention as assessed by treating physician.
Number of participant deathsUp to 30 days after appendicitis surgeryUp to 30 days after appendicitis surgery

Countries

United States

Contacts

PRINCIPAL_INVESTIGATORLucy Kornblith, MD

University of California, San Francisco

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jul 1, 2026