A male client abruptly sits up in bed, reports having difficulty breathing and has an arterial oxygen saturation of 88%. Which mode of oxygen delivery would most likely reverse the manifestations?

Correct Answer: B

Rationale: The correct answer is B: Non-rebreather mask. This device provides the highest concentration of oxygen among the choices, around 80-100%. In a client with difficulty breathing and low oxygen saturation, a high concentration of oxygen is crucial to quickly reverse hypoxemia. The non-rebreather mask ensures that the client is receiving the maximum amount of oxygen with each breath, improving oxygenation rapidly. A: Simple mask delivers a lower concentration of oxygen and would not be sufficient for a client in distress. C: Face tent does not provide a high concentration of oxygen and may not be effective in quickly reversing hypoxemia. D: Nasal cannula delivers a lower concentration of oxygen compared to the non-rebreather mask and may not be enough to reverse manifestations in a client with significant difficulty breathing and low oxygen saturation.

Correct Answer: B

Rationale: The correct answer is B: A lobe of the lung. During a lobectomy, a lobe of the lung is surgically removed, typically to treat lung cancer while preserving the remaining lung tissue. Removing one entire lung (choices A and D) is not necessary for a lobectomy and would be a more extensive procedure. Choice C, removing a small localized area near the surface of the lung, does not accurately reflect the extent of tissue removal required for a lobectomy. Therefore, the correct choice is B as it specifically addresses the removal of a lobe during the surgical procedure.

Correct Answer: B

Rationale: During inhalation, the diaphragm contracts and moves downward, increasing the volume of the thoracic cavity. This decrease in pressure within the thoracic cavity creates a pressure gradient, causing air to flow into the lungs where the pressure is now higher. Choice B is correct because the pressure in the thoracic cavity is indeed less than the pressure within the lungs during inhalation. Choices A, C, and D are incorrect because during inhalation, the pressure in the thoracic cavity decreases, the diaphragm moves downward and flattens, and the chest cavity volume increases to allow for air intake.

Correct Answer: B

Rationale: The correct answer is B: internal respiration. This process refers to the exchange of gases between blood and body cells. Pulmonary ventilation (A) is the process of breathing, moving air in and out of the lungs. External respiration (C) is the exchange of gases between the lungs and blood. Cellular respiration (D) is the process where cells use oxygen to produce energy. Internal respiration best describes the exchange of gases at the cellular level.

Correct Answer: B

Rationale: The correct answer is B because if the thoracic wall is punctured but not the lungs, air will enter the pleural cavity causing a pneumothorax. This leads to lung collapse and can result in death due to impaired gas exchange. Choices A and C are incorrect as the lungs do not get inflated and breathing rate does not decrease. Choice D is incorrect as the breathing rate actually increases in response to the decreased lung function.