Aromatherapy Treatment With Lavender Essential Oil to Reduce Post-Operative Nausea and Vomiting (PONV)

Administration of Lavender Angustifolia essential oil by inhalation in reducing nausea after abdominal, vascular, neurosurgical and gynaecological surgery under general anaesthesia during the 24-hour postoperative period.

Patients in the Usual Care group will follow the standard procedure, which consists of administering antiemetics if provided in therapy or reporting to the doctor with a subsequent treatment decision