(A) During impending respiratory failure or asthmatic complications, the client is placed in the high-Fowler position to facilitate comfort and promote optimal gas exchange. (B) Arterial blood gases are monitored in the treatment of respiratory failure during an asthma attack, but it is not an initial intervention. (C) O2 therapy is used during an asthma attack, but it is not the initial intervention. The usual prescribed amount is a cautiously low flow rate of 1-2 L/min. (D) Wheezing is a characteristic clinical finding during an asthma attack. If wheezing suddenlyceases, it usually indicates a complete airway obstruction and requires immediate treatment for respiratory failure or arrest.