Correct Answer: C

Rationale: When transporting a client with a chest tube connected to a closed drainage system, it is crucial to keep the drainage system below the level of the client's chest at all times. This positioning prevents the backflow of drainage into the client's chest, reducing the risk of complications. Clamping the chest tube, disconnecting it from the drainage system, or emptying the collection chamber are incorrect actions and can potentially harm the client or lead to complications.

Correct Answer: B

Rationale: In clients with laryngeal cancer, hoarseness is often one of the earliest manifestations due to vocal cord involvement. The irritation and inflammation caused by the tumor affect the vocal cords, leading to changes in voice quality. Dysphagia (choice A) typically occurs later as the tumor grows and interferes with swallowing. Dyspnea (choice C) and weight loss (choice D) may occur as the cancer progresses, but hoarseness is usually among the first signs to manifest in laryngeal cancer.

Correct Answer: C

Rationale: An OSHA-approved N95 respirator mask is recommended when caring for a client with tuberculosis due to the airborne transmission of the disease. Tuberculosis poses a higher risk of transmission via respiratory droplets, making respiratory protection essential to prevent exposure and infection among healthcare workers.

Correct Answer: A

Rationale: Arterial blood gases are crucial to assess postoperatively in a client who has undergone thoracotomy and lobectomy to monitor oxygenation and ventilation status. Changes in arterial blood gases can indicate respiratory complications or inadequate gas exchange, which are critical issues that need prompt intervention to prevent further complications. While urinary output, chest tube drainage, and pain level are important assessments, monitoring arterial blood gases takes precedence in this specific postoperative scenario to ensure optimal respiratory function and overall patient well-being.

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.