This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anaesthesia
[{'content': 'WHICH OF TH EFOLLOWING IS CONTRAINDICATED DURING THIS PROCEDURE ? \nSelect and explain. \nA. NECK FLEXION AT ATLANTO-OCCIPITAL JOINT, B. INTRODUCTION OF BLADE TOWARDS THE RIGHT SIDE OF OROPHARYNX, C. HEAD ELEVATION, D. PREOXYGENATION WITH 100% OXYGEN', 'role': 'user'}, {'content': 'Answer: A \nExplanation: THE PROCEDURE SHOW IS TH ENDOTRACHEAL INTUBATION IN THIS TECHNIQUE OF INTUBATION INCLUDES : PATIENT SHOULD BE SUPINE AND THERE SHOULD BE EXTENSION AT ATLANTOOCCIPITAL JOINT AND FLEXION AT CERVICAL SPINE Indications of endotracheal intubation : For suppoing ventilation in patient with :- Upper airway obstruction Respiratory failure Loss of conciousness 2 For suppoing ventilation during general anesthesia. 3. Patients at risk of pulmonary aspiration 4. Difficult mask ventilation 5. Any patient in imminent danger of upper airway obstruction (e.g. Burns of the upper airways). 6. Cardiac arrest Contraindication 1. Severe airway trauma or obstruction that does not permit safe way of an endotracheal tube. Emergency cricothyrotomy is indicated in such cases. 2. Cervical spine injury. 3. Mallampati Classification of class III / IV or other determination of potential difficult airway. ref : millers anesthesiology 9th ed', 'role': 'assistant'}]