HUMIGARD™ REDUCES PARTICLE COUNTS WITHIN THE WOUND: A CADAVER MODEL OF TOTAL HIP ARTHROPLASTY

Introduction Infection remains a clinically significant problem in orthopaedic surgery, particularly in joint arthroplasty. Current Infection prevention protocols aim to provide an aseptic operating room environment. An intervention to further reduce airborne particles local to the surgical site may be valuable to protect against infection. Surgical Humidification (F&P HumiGard™) is a novel device designed to provide a warm and hydrated wound environment and reduce particles entering the orthopaedic surgical site. This study aimed to evaluate the ability of HumiGard to deflect airborne particles during a dynamic simulation of total hip arthroplasty, involving movement of tools, surgeon's hands, and tissue. Methods A simulated total hip arthroplasty was performed on a human cadaver using the direct anterior approach under laminar downflow conditions. HumiGard was positioned at the surgical site before incision and remained throughout the procedure. Images of the surgical site were taken during the procedure. Airborne particles (0.3–10 µm) were continuously measured at the wound using an Optical Particle Sizer. Particle counts were compared between standard care (exposure to ambient air), and HumiGard conditions using the Mann–Whitney test. Results HumiGard significantly reduced airborne particle counts at the surgical site. Median particle counts were reduced by 61% compared to standard care (p < 0.0001), excluding measurements during bone saw use. Particle counts dropped immediately when HumiGard was turned on and increased again when turned off, indicating active deflection of exogenous particles. The device integrated seamlessly into the surgical workflow without impeding tool or hand movement. Conclusion This pilot study demonstrates that HumiGard effectively reduced surgical site airborne particle counts during a dynamic cadaveric model of total hip arthroplasty. These findings suggest HumiGard may be a valuable addition to current infection prevention protocols, helping to minimise airborne particle contamination and potentially reduce the risk of surgical site infection.