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': 'a known case of COPD with acute exacerbation of copd is managed in icu following is not true ? \nSelect and explain. \nA. NIV is not indicated, B. o2 inhalation, C. salbutamol inhalation, D. iv dexamethasone', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Role of NIV in Treating Acute COPD * Preferred therapy for exacerbations of COPD in the acute setting Respiratory acidosis: * PaCO2?_ 45 mmHg (6.0 kPa) * Aerial pH 7.35 * Improves oxygenation, increases pH, and decreases PaCO2 * Decreases respiratory rate, work of breathing (can help overcome auto-PEEP), and severity of breathlessness - Success rates up to 85% ref : willey 10th ed', 'role': 'assistant'}]