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Randomized Controlled Trial of Duration of Antibiotic Prophylaxis in Head and Neck Surgery with Free Flap Reconstruction, HEDAX Trial

Randomized Controlled Trial of Duration of Antibiotic Prophylaxis in Head and Neck Surgery with Free Flap Reconstruction for Adult Patients with Head and Neck Cancer, HEDAX Trial

Status
Recruiting
Phases
Phase 4
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12624000370505
Acronym
HEDAX trial
Enrollment
469
Registered
2024-03-28
Start date
2024-05-20
Completion date
2026-04-01
Last updated
2026-04-14

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

Conditions

None listed

Brief summary

Study Purpose: The purpose of this research is to establish whether 72 hours of antibiotics is superior to 24 hours of antibiotics in preventing infections of surgical wounds. Who is it for? You may be eligible for this study if you are an adult male or female Undergoing head and neck tumour resection and primary free flap reconstructive surgery for upper aerodigestive tract defects. Study details Participants will be randomly assigned to either 72-hour or 24-hour peri-operation antibiotic prophylaxis groups. Post head and neck operation and free flap reconstructive surgery, they will be monitored from postoperative day 1 to day 30 for incidence of surgical site infection using methods like culture, biochemical tests, radiological imaging, clinical diagnosis and Clavien-Dindo Classification of Surgical complications. It is hoped this information will improve perioperative management so that the best possible outcomes from surgery are achieved for patients having these major procedures.

Interventions

72-h group: Participants receiving 72 hours peri-operative antibiotic prophylaxis (9 doses of 2g intravenous cefazolin every 8 hours, 6 doses of 500mg intravenous metronidazole every 12 hours) Administered by the anaesthetists and registered nurses.
72-h group: Participants receiving 72 hours peri-operative antibiotic prophylaxis Cefazolin Intravenous [2g, (3g if weight >120kg)] Intra-operative: First dose on induction, re-dosing at 4 hourly intervals, Post-operative: 7-8 doses at 8 hourly intervals from last intra-operative dose# and Metronidazole Intravenous (500mg) Intra-operative: First dose on induction, Post -operative: 5 Subsequent doses at 12 hourly intervals # Dependent on duration of surgery. Do not administer at or beyond 72ho

72-h group: Participants receiving 72 hours peri-operative antibiotic prophylaxis Cefazolin Intravenous [2g, (3g if weight >120kg)] Intra-operative: First dose on induction, re-dosing at 4 hourly intervals, Post-operative: 7-8 doses at 8 hourly intervals from last intra-operative dose# and Metronidazole Intravenous (500mg) Intra-operative: First dose on induction, Post -operative: 5 Subsequent doses at 12 hourly intervals # Dependent on duration of surgery. Do not administer at or beyond 72hour from start of surgery. (Patients with hypersensitivity to penicillin - Clindamycin Intravenous (600mg) Intra-operative: First dose on induction, re-dosing at 6 hourly intervals, Post-operative: 7 doses at 8 hourly intervals from last intra-op dose) Administered by the anaesthetists and registered nurses.

Sponsors

The Royal Melbourne Hospital, Melbourne Health
Lead SponsorHospital

Study design

Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Prevention
Masking
Open (masking not used)

Eligibility

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

Inclusion criteria

• Aged greater than or equal to 18 years of age • Undergoing tumour resection and primary free flap reconstructive surgery for upper aerodigestive tract defects • Clean-contaminated procedure (Centers for Disease Control and Prevention [CDC] criteria)

Exclusion criteria

Patients who are unable to consent for themselves (e.g., due to cognitive or intellectual impairment)

Outcome results

None listed

Source: ANZCTR · Data processed: Apr 17, 2026