P Pu ur rp po os se e: : To evaluate the use of inhalational induction followed by intubation through the intubating laryngeal mask (ILM) for patients with severe ankylosing spondylitis undergoing elective surgery who prefer airway management under anesthesia.M Me et th ho od ds s: : Nine patients undergoing a total of 11 procedures were enrolled in the study. Fentanyl 2 µg·kg 1 , midazolam 0.035 mg·kg