Correct Answer: B

Rationale: Keeping the collection device below the level of the client's chest ensures proper drainage and prevents backflow of fluid into the patient's chest. This position allows gravity to assist in the drainage process. Clamping the tube when the client is ambulating can cause a buildup of pressure in the chest drainage system, potentially leading to complications. Carefully coiling the tubes is important to prevent obstructions and kinks that could impede the flow of drainage. Positioning the client flat may not be ideal as it could hinder proper drainage and increase the risk of leaks in the tubing.

Correct Answer: B

Rationale: The absence of fluctuations in the water seal chamber indicates that the client's lung has re-expanded. This finding suggests that the negative pressure in the pleural space is restored, preventing air from entering the system. Oxygen saturation, absence of pleuritic chest pain, and occasional bubbling in the water-seal chamber are important assessments but do not specifically indicate lung re-expansion.

Correct Answer: C

Rationale: During an asthma attack, hypoxemia can lead to inadequate oxygen supply to the brain, causing symptoms like restlessness, confusion, and agitation. These manifestations result from the body's response to low oxygen levels, aiming to increase oxygenation. Nausea, dysphagia, and hypotension are not typical manifestations of hypoxemia during an asthma attack.

Correct Answer: C

Rationale: Following a thoracentesis, it is crucial for healthcare professionals to monitor for potential complications. Increased heart rate can indicate hypovolemia or other serious issues, such as bleeding or pneumothorax, and requires immediate attention to prevent further complications. Serosanguineous drainage from the puncture site is a common expected finding post-procedure. Discomfort at the puncture site is also common and can be managed with appropriate interventions. Decreased temperature is not typically associated with complications following a thoracentesis. Therefore, the correct answer is increased heart rate as it signifies a potential serious complication that needs prompt medical evaluation.

Correct Answer: C

Rationale: When the nurse observes the absence of left-sided chest wall expansion upon respiration, it indicates that the endotracheal tube (ET) may have migrated into the right main bronchus, leading to uneven chest expansion. This can result in inadequate ventilation to the left lung, causing respiratory compromise. The other options, such as blockage of the ET tube by the client's tongue, passage of the ET tube into the esophagus, and infection of the vocal cords, do not directly explain the observed chest wall asymmetry and respiratory distress.