Prophylactic Use of Ketamine and Tramodol for the Prevention of Intra-Operative Shivering in Lower Limb Surgeries Done in Spinal Anesthesia. mfm [Internet]. 2024 Apr. 13 [cited 2025 Dec. 26];31(7). Available from: https://medicalforummonthly.com/index.php/mfm/article/view/2323