This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
In a patient with bronchial asthma silent chest signifies 
Select and explain. 
A. Good Prognosis, B. Bad Prognosis, C. Grave Prognosis, D. Not a Prognostic sign
C: Grave Prognosis
Answer: C: Grave Prognosis 
Explanation: Ans. is 'c' i.e., Grave Prognosis Silent chest (Little/no air movement without wheezes in Bronchial Asthma suggests a grave prognosis/impending respiratory failure (Life threatening Asthma). Signs of impending respiratory failure include : Drowsiness or confusion Diaphoresis Bradycardia Paradoxical thoraco abdominal Signs of impending respiratory failure in Asthma Drowsiness or confusion Diaphoresis Bradycardia Paradoxical thracoabdominal movements PEFR < 33% Hypotension Pulsus paradoxus Hypercapnea Silent chest