Correct Answer: B

Rationale: In a client with a high respiratory rate, low PaO2, and low SaO2, the priority intervention is to improve oxygenation. Administering oxygen via a face mask will help increase the oxygen supply to the client's lungs and tissues, addressing the hypoxemia. While mechanical ventilation may be necessary in severe cases, administering oxygen is the initial and most appropriate intervention to address the client's respiratory distress. Sedatives should not be given without ensuring adequate oxygenation. Assessing for pulmonary embolism is important but not the priority at this moment when the client is experiencing respiratory distress and hypoxemia.

Correct Answer: A

Rationale: In a client with multiple system trauma, airway protection is the priority focus of care. Ensuring a patent airway is crucial for oxygenation and ventilation, which are essential for maintaining vital functions. Without a clear airway, the client's oxygenation and ventilation could be compromised, leading to severe consequences. While decreasing intracranial pressure, stabilizing cardiac arrhythmias, and preventing musculoskeletal disability are important aspects of care, ensuring airway protection takes precedence in this emergency situation.

Correct Answer: B

Rationale: When suspecting anaphylaxis, the priority intervention is to assess the client's respiratory status by counting the respiratory rate. Respiratory distress is a hallmark sign of anaphylaxis, and prompt recognition and management are crucial. Administering oxygen may be necessary, but assessing the respiratory rate takes precedence to determine the severity of the reaction and the need for immediate intervention. Inserting an IV line and preparing for intubation are important interventions in managing anaphylaxis but are secondary to ensuring adequate ventilation.

Correct Answer: A

Rationale: Before initiating percussion, vibration, and postural drainage, the nurse should first auscultate the lung fields to assess the baseline lung sounds and identify areas of congestion or abnormality. This initial assessment helps the nurse to tailor the percussion and drainage techniques effectively. Assessing pulse and respirations, sputum characteristics, and providing instructions to the client for exhalation are important steps in the procedure but should follow the initial auscultation to ensure a comprehensive and individualized care approach.

Correct Answer: A

Rationale: In a client with multiple injuries following a motor vehicle crash, the priority is to assess for any compromised airway or breathing. Evaluating chest expansion helps the nurse determine if the client is having any difficulty breathing, which is essential for immediate intervention to maintain adequate oxygenation. Checking pupillary response, assessing capillary refill, and checking the client's orientation to place and time are important assessments but are of lower priority compared to ensuring the client's airway and breathing are intact.