This randomized controlled study aims to evaluate the effectiveness of a vacuum-assisted electric trimmer (VD-ETM) compared with a standard electric trimmer (ETM) for preoperative hair removal. The study will assess microbial and environmental contamination, surgical site infection (SSI), procedure duration, skin integrity, patient safety, and patient satisfaction. Preoperative hair removal is a critical step in preventing SSI; however, conventional ETM devices may contribute to environmental contamination due to dispersed hair particles. VD-ETM systems are designed to reduce this risk by simultaneously removing hair and capturing particles. This study will provide evidence on whether VD-ETM improves operating room hygiene and patient outcomes.