A known case of bronchial asthma presents with respiratory distress, a respiratory rate of 48/min and can barely speak 2 words. Nebulised salbutamol was given and pt speak a sentence but there was a fall in Sp02 95% to 85%. What be the possible explanation?
Ventilation perfusion mismatch because of increased dead space ventilation Intrathoracis shunting Dure to salbutamol Faulty oximeter