General anesthesia with endotracheal intubation requires insertion of a tube in the trachea by laryngoscopy for ventilation of the lungs. Standard polyvinyl chloride(PVC) tubes are routinely used for tracheal intubation, are stiffer and have a preformed curvature. Curved reinforced endotracheal tubes(CRT) have a metal wire coil embedded in the wall of the tube shaft, are non-compressible and more flexible. These are required for certain surgeries like head and neck, neurosurgery and surgeries in the prone position when access to the airway is limited for the anesthetist and there are increased chances of kinking of the tube during surgery. 

Videolaryngoscope is a digital laryngoscope which uses indirect laryngoscopy for laryngeal visualization. It does not require alignment of the oral-pharyngeal and laryngeal axes, requires less force than used during direct laryngoscopy and has a higher success rate, especially in patients with difficult airways. Numerous studies have studied the use of videolaryngoscope aided intubations using standard PVC tubes. However, there are no studies which have compared the use of standard PVC tubes with CRT using channeled kingvision videolaryngoscope. This would be especially useful in conditions where a reinforced endotracheal tube is required for a patient with anticipated difficult intubation

This prospective, randomised study therefore aims to study the ease of intubation of trachea with curved reinforced endotracheal tubes(CRT) as compared to standard Polyvinyl Chloride (PVC) tubes using kingvision videolaryngoscope