An old man underwent interscalene block with sedation for his shoulder surgery. He's a known case of COPD . Post surgery he was not breathing freely and had mild wheeze but saturation was 97. What should be done in this case? 1.

ABG 2. CPAP 3. BiPAP 4. Nebulizer Answer: CPAP could be a good choice but BiPAP would be better option.