Clinical Performance of the Baska MaskⓇ, the I-GelⓇ and the Self-Pressurized Air-QⓇ i

* Inclusion criteria 1. Adult patients from 18 to 60 years of age. 2. American Society of Anesthesiologists (ASA) physical status I and II 3. Both genders 4. Patients scheduled for elective surgeries lasting less than 2 hours under general anesthesia on spontaneous ventilation. 5. El Ganzouri index Score ≥ 4 6. Patients with BMI \< 35 kg/m2 * Exclusion criteria 1. The patients who will be refusal or inability to give informed consent, 2. ASA class III or IV 3. El Ganzouri index Score \< 4, 4. Oropharyngeal pathology making a proper SAD fit unlikely as weak dentation, neck pathology 5. Respiratory illness including upper respiratory infection or pneumonia within the six weeks preceding surgery 6. Risk for gastric aspiration (e.g., hiatus hernia, gastro-oesophageal reflux disease or non-fasting status), expected duration of surgery longer than 2 h 7. Contraindication to SGA use including morbid obesity (body mass index 35 kg m-1, history of obstructive sleep apnea) 8. Any condition for which the primary anesthesia team deemed intubation with a tracheal tube to be necessary.