<prompt> In a patient with bronchial asthma silent chest signifiesGood PrognosisBad PrognosisGrave PrognosisNot a Prognostic sign  <response>: Ans. is c i.e., Grave Prognosis Silent chest Littleno air movement without wheezes in Bronchial Asthma suggests a grave prognosisimpending 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 