Correct Answer: A

Rationale: Administering oxygen is the initial step in managing a suspected pulmonary embolism. Oxygen therapy is crucial to improve oxygenation levels in the blood when there is a suspected blockage in the pulmonary artery. Administering anticoagulants, although important in the treatment of pulmonary embolism, is not the first step as ensuring adequate oxygen supply takes precedence. Repositioning the patient or administering IV fluids are not the primary interventions for a suspected pulmonary embolism and are not as essential as providing oxygen support.

Correct Answer: D

Rationale: The correct answer is D, Metformin. Metformin should be discontinued 48 hours before an arteriogram due to the risk of lactic acidosis. Atorvastatin (Choice A) is a statin used to lower cholesterol levels and is not typically contraindicated before an arteriogram. Digoxin (Choice B) is a medication used for heart conditions and does not need to be discontinued before an arteriogram. Nifedipine (Choice C) is a calcium channel blocker used to treat high blood pressure and angina, and it is not necessary to discontinue before the procedure.

Correct Answer: D

Rationale: Giving a bowel prep solution is essential to clean out the colon thoroughly before a colonoscopy. This process is crucial as it helps to achieve a clear view of the colon during the procedure. Providing clear instructions on diet (Choice A) and ensuring the patient has an empty stomach (Choice C) are important steps in the preparation process but may not be sufficient on their own to adequately cleanse the colon. Explaining the procedure in detail (Choice B) is helpful for patient education but does not directly contribute to the physical preparation required for a successful colonoscopy.

Correct Answer: A

Rationale: The correct action for a patient experiencing chest pain is to administer aspirin. Aspirin helps reduce the risk of clot formation in patients with chest pain, as it has antiplatelet effects. Repositioning the patient may not address the underlying cause of the chest pain. Checking oxygen saturation is important but not the initial priority in this scenario. Surgery is not typically the first-line treatment for chest pain without further assessment and diagnostic procedures.

Correct Answer: C

Rationale: The correct answer is C: Monitor the client's respiratory rate. When a client is receiving opioid analgesics, the priority assessment is monitoring respiratory rate. Opioids can cause respiratory depression, so it is crucial to assess the client's breathing to detect any signs of respiratory distress promptly. Checking the client's blood pressure (Choice A) and urinary output (Choice B) are important assessments too, but they are not the priority when compared to ensuring adequate respiratory function. Assessing the client's pain level (Choice D) is essential for overall care but is not the priority assessment when the client is on opioids, as respiratory status takes precedence.