Reusable Equipment in Anaesthesia: A Comprehensive Reviewof Reprocessing Practices, Sterility Frameworks and InternationalGuidelines

Abstract

The reprocessing of reusable medical equipment in anaesthesia is a critical component of infection control and patient safety within the Operating Theater (OT). Anaesthetic equipment frequently spans all three categories of Spaulding’s classification (critical, semi-critical, and non-critical), creating complex demands for localized decontamination, mechanical washing, and high-level disinfection or sterilization. This comprehensive review examines the types of reusable anaesthesia equipment, detailing their mechanical requirements and material vulnerabilities. It explores the systematic stages of reprocessing: starting from pre-cleaning at the point of use, through automated ultrasonic cleaning and enzymatic washing, up to the execution of precise high-level disinfection (HLD) or terminal steam sterilization. Additionally, this article examines the fundamental physics and microbiology of sterility, including the “Stages of Sterility” defined by structural barriers, validation kinetics via D-value and Z-value calculations, and sterile assurance levels (SAL). Finally, it synthesizes current consensus recommendations from major international organizations-such as the Association of Anaesthetists (AAGBI), the American Society of Anesthesiologists (ASA), and the World Health Organization (WHO)-to outline an evidence-based roadmap for optimizing environmental
sustainability without compromising patient safety.