Correct Answer: C

Rationale: The correct initial action when a patient presents with chest pain is to obtain an ECG. This helps assess the heart's electrical activity and determine the cause of chest pain. Administering aspirin or oxygen therapy may be necessary later based on the ECG findings, but obtaining an ECG is the priority to evaluate the cardiac status. Surgery preparation is not the initial action for chest pain and should only be considered after a thorough assessment.

Correct Answer: C

Rationale: Encouraging the client to ambulate as soon as possible is essential in preventing complications like deep vein thrombosis post knee arthroplasty. While keeping the affected leg elevated and applying ice packs can be beneficial in certain situations, early ambulation takes precedence in this case. Performing range-of-motion exercises hourly may not be necessary and could potentially cause more harm than good if not done correctly or excessively.

Correct Answer: A

Rationale: The correct instruction the nurse should include is to advise the client to avoid consuming foods high in vitamin K. Foods rich in vitamin K, such as leafy greens, can interfere with the effectiveness of warfarin, an anticoagulant medication. Therefore, it is important for clients on warfarin therapy to maintain consistent vitamin K intake to keep their INR levels stable. The other options are also important but not the priority in the context of warfarin therapy. Ingesting foods high in vitamin K can affect the medication's efficacy, making it crucial to highlight this dietary consideration during client education.

Correct Answer: A

Rationale: Checking for skin turgor is a reliable method to assess dehydration in patients. Skin turgor refers to the skin's elasticity and hydration status. When a healthcare professional gently pinches the skin on the back of the patient's hand or forearm, dehydration is indicated by the skin not snapping back immediately. Monitoring blood pressure (choice B) is important but is more indicative of cardiovascular status rather than dehydration specifically. Checking for dry mucous membranes (choice C) can be a sign of dehydration, but skin turgor is a more direct assessment. Monitoring urine output (choice D) is also essential but may not provide immediate feedback on hydration status as skin turgor does.

Correct Answer: A

Rationale: The most important nursing intervention for a patient with a suspected pulmonary embolism is to administer anticoagulants. Anticoagulants help prevent further clot formation in the patient's blood vessels, reducing the risk of complications such as worsening of the pulmonary embolism or development of new clots. Administering oxygen (Choice B) may be necessary to support the patient's oxygenation, but anticoagulants take precedence as they target the underlying cause of the pulmonary embolism. Repositioning the patient (Choice C) and monitoring oxygen saturation (Choice D) are important aspects of patient care but are not the primary intervention for a suspected pulmonary embolism.