Postoperative variations in anaemia treatment and transfusions (POSTVenTT): protocol for a prospective multicentre observational cohort study of anaemia after major abdominal surgery

Perioperative anaemia is common and is associated with increased postoperative complications, delayed recovery and increased morbidity and mortality. However, current management of anaemia after surgery is variable. This student- and trainee-led collaborative study aims to audit the postoperative variations in anaemia treatment and transfusions (POSTVenTT) and quantify its impact on patient outcomes after major abdominal surgery.This is the first Australian and Aotearoa New Zealand multicentre study in surgical patients conducted by networks of trainees, students and consultants. Data will be prospectively collected on consecutive adult patients undergoing elective and emergency major abdominal surgery with follow-up to 30 days after hospital discharge. The primary endpoint will be adherence to anaemia management guidelines. Secondary outcomes will include postoperative anaemia, blood transfusion, postoperative complications as per the Clavien-Dindo classification, length of stay and hospital readmission at 30 days.This protocol describes the first Australian and Aotearoa New Zealand collaborative study by medical students and surgical trainees. The collaboration will aim to provide a clear understanding of current practices regarding the management and risk factors for anaemia and association with patient outcomes after major abdominal surgery.