A nurse is caring for a client who has pneumonia and has been receiving oxygen therapy for several days.
Which of the following findings should the nurse identify as an indication of an adverse effect of oxygen therapy?
Tachycardia
Cracks in oral mucous membranes
Excessive pulmonary secretions
Poor skin turgor
The Correct Answer is B
Choice A rationale:
Tachycardia, or a rapid heart rate, is not typically an adverse effect of oxygen therapy. Oxygen therapy is often used to help people with conditions like COPD, COVID-19, emphysema, and sleep apnea get enough oxygen to function and stay well. While tachycardia can be a symptom of these conditions, it is not directly caused by the oxygen therapy itself.
Choice B rationale:
Cracks in the oral mucous membranes can indeed be an adverse effect of oxygen therapy. Oxygen therapy involves the delivery of highly concentrated oxygen, which can cause irritation and dryness in the airways, including the oral mucous membranes. This can lead to cracks and discomfort in the mouth. Therefore, it’s important for healthcare providers to monitor patients receiving oxygen therapy for signs of this adverse effect.
Excessive pulmonary secretions are not typically a direct adverse effect of oxygen therapy. While conditions that often require oxygen therapy, such as pneumonia and COPD, can lead to increased pulmonary secretions, these are symptoms of the underlying disease rather than the oxygen therapy itself.
Choice D rationale:
Poor skin turgor is not typically an adverse effect of oxygen therapy. Skin turgor refers to the elasticity of the skin, and poor skin turgor is often a sign of dehydration. While oxygen therapy can cause dryness of the mucous membranes, it does not typically affect the hydration status of the skin.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale:
Prone The prone position, in which a patient lies facedown, is beneficial for patients with pneumonia as it helps shift the fluid away from the back of the lungs, allowing more air to enter. It also improves ventilation in the lungs and reduces the risk of lung collapse. However, this position is not the most effective for maximum lung expansion in pneumonia patients.
Choice B rationale:
Side-lying Lateral positioning, in which the patient lies on one side, is recommended for patients suffering from pneumonia in just one lung. In this position, the pneumatic lung is exposed to a higher blood flow, resulting in greater oxygenation levels and improved lung expansion. This position can also help prevent lung injury by helping regulate pressure and improve aeration.
But again, this is not the most effective position for maximum lung expansion in pneumonia patients.
Choice C rationale:
Supine The supine position, where the patient lies flat on their back, is not the best position for a pneumonia patient. This position can cause the secretions to pool in the lungs, making it harder for the patient to breathe and potentially worsening their condition. Choice D rationale:
Upright Elevating the head of the bed is an effective way to improve lung expansion and oxygenation levels in pneumonia patients. This position also helps eliminate airway obstruction, reduces pressure on the lungs, and promotes drainage of fluids from the lungs. Therefore, the upright position is the most recommended for maximum lung expansion in pneumonia patients.
Correct Answer is A
Explanation
Choice A rationale:
Muscle twitching is a symptom of oxygen toxicity. Oxygen toxicity is a condition resulting from the harmful effects of breathing molecular oxygen (O2) at increased partial pressures. Severe cases can result in cell damage and death, with effects most often seen in the central nervous system, lungs, and eyes. Central nervous system symptoms can include muscle twitching.

Choice B rationale:
Redness of the face is not typically associated with oxygen toxicity. Oxygen toxicity primarily affects the central nervous system, lungs, and eyes. It does not typically cause redness of the face.
Choice C rationale:
Swelling around the eyes is not a common symptom of oxygen toxicity. The primary effects of oxygen toxicity are seen in the central nervous system, lungs, and eyes. However, this does not typically manifest as swelling around the eyes.
Choice D rationale:
A metallic taste in the mouth is not a known symptom of oxygen toxicity. Oxygen toxicity is a condition that results from the harmful effects of breathing molecular oxygen (O2) at increased partial pressures. It primarily affects the central nervous system, lungs, and eyes, but a metallic taste in the mouth is not a recognized symptom.
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