Correct Answer: A

Rationale: In this scenario, the priority action for the nurse is to administer oxygen and elevate the head of the bed. These interventions help relieve dyspnea and chest pain, which can be indicative of a pulmonary embolism or other complications during heparin therapy. Administering nitroglycerin (Choice B) is not the initial priority in this situation as the client's symptoms are not suggestive of angina. Assessing for bleeding (Choice C) is important but not the first action needed to address chest pain and dyspnea. Administering albuterol (Choice D) is not indicated unless there are specific respiratory issues requiring it, which are not described in the scenario.

Correct Answer: D

Rationale: The correct answer is D. A decrease in white blood cell count indicates that the infection is responding to treatment, making this the most objective indicator of improvement in a client with sepsis. Choices A, B, and C are subjective indicators and may not always directly correlate with the resolution of the underlying infection. While an increase in urine output, a client reporting feeling less fatigued, and a decrease in heart rate are positive signs, they are not as specific or directly related to the resolution of the infection as a decrease in white blood cell count.

Correct Answer: A

Rationale: Correct Answer: Monitoring respiratory status and oxygenation is crucial in clients with lung cancer, as metastasis to the lungs or pleural effusion can compromise breathing. This assessment helps in early identification of respiratory distress and the need for interventions to maintain adequate oxygenation. Choice B is important but not the priority in this situation. Evaluating mental status and cognition should follow after ensuring the client's physiological needs are met. Choice C, checking pain level and providing comfort, is essential but secondary to assessing respiratory status. Choice D, assessing nutritional status and appetite, is also important but not the priority when the client's breathing is at risk.

Correct Answer: B

Rationale: Muscle cramps and tingling in clients with chronic renal failure are often associated with hypocalcemia. Monitoring calcium levels is crucial to identify imbalances and manage symptoms appropriately. Sodium, phosphate, and potassium levels are important in renal failure but are not directly related to the symptoms of muscle cramps and tingling reported by the client.

Correct Answer: B

Rationale: The correct answer is B: The importance of taking medication as prescribed. In the treatment of tuberculosis, adherence to the prescribed medication regimen is crucial to effectively manage the infection and prevent the development of drug resistance. Choices A, C, and D are incorrect because bronchodilators, salt intake, and sunlight exposure are not directly related to the treatment of tuberculosis with isoniazid and rifampin.