Patients in the age group of 18 to 65 of either sex with BMI above 25 kg / m² who are undergoing elective surgery under general endotracheal anaesthesia will be enrolled for the study with written informed consent. A day before the surgery a thorough preanaesthetic evaluation and assessment of the airway is done using conventional (Modified mallampatti score, thyromental distance,  interincisor gap, neck movements and sternomental distance) assesment methods. Then on the day of surgery in the preoperative room ultrasonographic measurement of anterior neck at 3levels: Distance from skin to hyoid bone(DSHB), Distance from skin to anterior commisure of vocal cord (DSAC) and Distance from skin to thyrohyoid membrane (DSTM) at midline will be performed with the patient lying in supine with head and neck in neutral position using Logiq p6 pro ultrasound system manufactured by GE health care

On the day of surgery  after connecting the monitors and securing intravenous lines patient is  preoxygenated for 3 minutes with 100 % oxygen and  premedicated with Inj. midazolam 0.1mg/kg  iv and Inj.Fentanyl 1 microgram/kg iv. For intravenous induction Inj. propofol 2 mg/kg will be used. After ensuring adequate ventilation, Inj succinylcholine 1.5 mg/kg will be given to achieve adequate muscle relaxation. All laryngoscopies will be done by experienced anaesthesiologists by macintosh laryngoscope using conventional methods and cooks modification of Cormack Lehane Grading will be assessed. Time taken, number of attempts and any manipulations necessary to intubate will be noted.

Modified Mallampatti classification (MMC).