A client with chronic obstructive pulmonary disease (COPD) is receiving oxygen therapy. Which finding indicates that the therapy is effective?

Correct Answer: C

Rationale: In a client with COPD receiving oxygen therapy, an effective response is indicated by a respiratory rate of 20 breaths per minute. This suggests that the client is effectively oxygenating while maintaining an appropriate respiratory rate. Choices A, B, and D are incorrect because expectorating secretions easily, having an oxygen saturation of 92%, and arterial blood gases showing a pH of 7.35 are not specific indicators of the effectiveness of oxygen therapy in COPD. Oxygen saturation of 92% may still be suboptimal in COPD, and arterial blood gases showing a pH of 7.35 may not necessarily reflect the overall effectiveness of oxygen therapy.

Correct Answer: D

Rationale: Decreased deep tendon reflexes are a critical finding in hypokalemia that indicates severe potassium deficiency affecting neuromuscular function. Immediate intervention is necessary to prevent life-threatening complications such as respiratory failure or cardiac arrhythmias. Muscle weakness, irregular heart rate, and increased urinary output are also associated with hypokalemia but do not pose the same level of urgency as decreased deep tendon reflexes.

Correct Answer: A

Rationale: The 45-year-old father who smokes and has high cholesterol is at a higher risk for cardiovascular disease due to multiple risk factors. Smoking and high cholesterol are significant contributors to the development of cardiovascular issues. Prioritizing his evaluation and intervention is crucial to address these modifiable risk factors. The other family members, though they may have risk factors as well, do not present with the same level of immediate risk based on the information provided.

Correct Answer: D

Rationale: Cyanosis is a late sign of hypoxemia and indicates severe oxygen deprivation, necessitating immediate intervention in a client with a suspected pulmonary embolism. Chest pain, shortness of breath, and tachycardia are also concerning symptoms in pulmonary embolism; however, cyanosis signifies critical oxygen deficiency and warrants urgent attention to prevent further complications.

Correct Answer: D

Rationale: The correct answer is D. Chest pain radiating to the left arm can be a sign of myocardial infarction (heart attack) and requires immediate intervention. This symptom is known as a classic presentation of a heart attack and warrants urgent medical attention to prevent further cardiac damage. Choices A, B, and C are not directly indicative of an acute cardiac event and may not require immediate intervention in this scenario. While heart rate, blood pressure, and respiratory rate are important vital signs to monitor, they do not specifically indicate the urgency associated with chest pain radiating to the left arm in a patient with a history of coronary artery disease.