Laryngoscopic glottic view with miller vs macintosh blade in adults posted for surgery under general anaesthesia:a randomized controlled trial.

Appropriate laryngoscopic view decreases laryngoscopy time and hence intubation reflex. This increases safety margin for the patient, various types of laryngoscope and techniques of laryngoscopy have been used for securing the endotracheal tube. The standard curved Macintosh blade is preferred by anaesthesiologists in routine intubations. This laryngoscope has the advantage of allowing more room in the oropharynx for manipulation of the endotracheal tube; however poor visualization of the larynx is often encountered problem because the blade interferes with the line of sight of larynx especially in patients with decreased space in oral cavity. With macintosh blade it is not always possible to manipulate the entire tongue to left, leading to compression of base of tongue and posterior displacement of epiglottis, which leads to decreased view of vocal cords. In such situations miller straight blade have been found beneficial because there is less tissue volume present in the oropharynx to be displaced and reduced tongue compression as compared with the macintosh blade.Till now there are limited studies available comparing the two blades with regard to laryngoscopic view and ease of intubation. Hence a prospective comparative study will be undertaken to evaluate the laryngoscopic view and ease of intubation with both the aforementioned blades in routine tracheal intubations.