Correct Answer: A

Rationale: An increased respiratory rate from 18 to 44/min is a significant change that should alert the healthcare professional to a potential serious complication. Such a drastic increase in respiratory rate may indicate respiratory distress or hypoxia, which are critical conditions requiring immediate attention. The other options show minor changes in vital signs that are within normal limits and are less likely to indicate a serious complication.

Correct Answer: A

Rationale: Fluctuation of the fluid level within the water seal chamber indicates proper functioning of the chest tube. This fluctuation reflects the normal ebb and flow of air and fluid in the pleural space, demonstrating that the system is maintaining the appropriate pressure. Continuous bubbling in the water seal chamber may indicate an air leak, absence of fluid in the drainage tubing suggests a blockage, and equal amounts of fluid drainage in each collection chamber are not expected in this system.

Correct Answer: B

Rationale: Continuous bubbling in the water-seal chamber indicates an air leak, which can compromise the system's integrity and affect the client's respiratory status. The other options are expected findings in a client with a chest tube drainage system: constant bubbling in the suction-control chamber indicates proper suction function, bloody drainage in the collection chamber is expected in the immediate postoperative period, and fluid-level fluctuations in the water-seal chamber demonstrate normal drainage and lung re-expansion.

Correct Answer: D

Rationale: In a client with a sucking chest wound, the priority is to administer oxygen via nasal cannula to improve oxygenation. The client's blood pressure, weak pulse rate, and elevated respiratory rate indicate hypovolemic shock, so increasing oxygen supply is crucial. Raising the foot of the bed, removing the dressing, or preparing to insert a central line are not immediate actions needed for a client with a sucking chest wound and signs of shock.

Correct Answer: D

Rationale: Encouraging the client to drink 2 to 3 liters of water daily helps to thin bronchial secretions, making them easier to expectorate. This can assist the client in coughing up the tenacious secretions. Maintaining a semi-Fowler's position can aid in improving lung expansion but may not directly address the issue of clearing the secretions. Administering oxygen via nasal cannula at 2 L/min can help improve oxygenation but does not specifically target the removal of bronchial secretions. Selecting a low-salt diet is important for overall health, but it does not directly address the client's immediate concern of clearing the bronchial secretions.