<prompt> A female patient after injury comes to casualty. Her ABG shows low pH. PCO2 high, bicarbonate normal.The diagnosis is -Respiratory alkalosisRespiratory acidosisMetabolic acidosisMetabolic alkalosis  <response>: First stepDetermine whether academia or alkalemia is presentpH is low, indicating acidosisSecond stepInspect HCO3-CO2 to determine the cause of alkalemia or academia.In this case, the pCO2 is high and the bicarbonate is normal, so the acidosis can be easily attributed to increased CO2Thus, this is a case of respiratory acidosis 