Correct Answer: B

Rationale: Atelectasis is a condition where the alveoli in the lungs collapse, leading to impaired gas exchange. As a result, the client may experience increasing dyspnea (difficulty breathing) due to the decreased lung capacity for oxygen exchange. Facial flushing, decreasing respiratory rate, and friction rub are not typically associated with atelectasis.

Correct Answer: A

Rationale: Continuous bubbling in the water-seal chamber indicates air is leaking into the pleural space, which is a complication. The water-seal chamber should have intermittent bubbling during normal functioning. Occasional bubbling in the water-seal chamber is normal and shows the system is working as intended. Constant bubbling in the suction-control chamber suggests an issue with the suction control. Fluctuations in the fluid level in the water-seal chamber are an expected finding.

Correct Answer: C

Rationale: In respiratory acidosis, there is an excess of carbon dioxide (PaCO2 > 45 mm Hg) leading to a decrease in pH (<7.35). The given values of a pH of 7.3 and PaCO2 of 50 mm Hg indicate respiratory acidosis. Metabolic acidosis involves a primary decrease in bicarbonate levels with a compensatory decrease in PaCO2 to maintain balance. Metabolic alkalosis is characterized by elevated pH and bicarbonate levels. Respiratory alkalosis is marked by low PaCO2 and increased pH levels.

Correct Answer: B

Rationale: When a client develops an airway obstruction and remains conscious, the nurse's initial action should be to administer the abdominal thrust maneuver. This technique, also known as the Heimlich maneuver, can help dislodge the obstructing object and clear the airway. Inserting an oral airway, turning the client to the side, or performing a blind finger sweep are not recommended as the first interventions for a conscious individual with an airway obstruction.

Correct Answer: A

Rationale: The client's shallow respirations at 9/min indicate hypoventilation, leading to an accumulation of carbon dioxide in the blood, causing respiratory acidosis. In this scenario, the client is at risk for developing respiratory acidosis due to inadequate ventilation and subsequent CO2 retention.