Which of the following information best helps to distinguish…

Which of the following information best helps to distinguish chronic hypercapnic respiratory failure from acute hypercapnic respiratory failure?  Long-standing dyspnea that worsens on exertion.  Forced expiratory volume in 1 sec to forced vital capacity ratio (FEV1/FVC) of less than 75% predicted.  Kidneys retaining bicarbonate to elevate the blood pH.  Physical signs of hypoxemia, such as cyanosis and clubbing.

Al of the following strategies can help reduce auto-PEEP in…

Al of the following strategies can help reduce auto-PEEP in mechanically ventilated patients with obstructive lung disease except:1.  Use high inspiratory flows (70 to 100 L/min).2.  Apply extrinsic PEEP.3.  Use low VT values (6 to 8 ml/kg).4.  Use high respiratory rates (>25/min).