Patients admitted to the Plastic, Reconstructive and Regenerative Surgery Unit who meet inclusion criteria will be randomly assigned (1:1) to the experimental group (lavender essential oil inhalation for 15 minutes via dedicated diffuser) or to the placebo group (physiological saline inhalation for 15 minutes). Assessments occur at T0 (ward admission before aromatherapy), T1 (arrival in operating block after aromatherapy, before surgery), T2 (end of surgical procedure), T3 (48 hours post-surgery), and T4 (7 days post-surgery for complications). Primary psychometric assessments include STAI Y-1 and STAI Y-2; additional measures include DASS-21 and vital signs. Randomization is centralized and computer-generated; allocation is concealed. Estimated data collection period: approximately six months. Sample size: 33 subjects per arm (66 total).
