The client is receiving heparin therapy for deep vein thrombosis (DVT). Which lab test should be monitored to evaluate the effectiveness of heparin?

Correct Answer: C

Rationale: Activated partial thromboplastin time (aPTT) is the appropriate lab test to monitor the therapeutic effectiveness of heparin therapy. Heparin affects the intrinsic pathway of the coagulation cascade, and monitoring aPTT helps ensure the client is within the therapeutic range to prevent clot formation. Prothrombin time (PT) and International normalized ratio (INR) are used to monitor warfarin therapy, a different anticoagulant that affects the extrinsic pathway of the coagulation cascade. Fibrinogen levels are not specific to monitoring heparin therapy.

Correct Answer: B

Rationale: Spinach is high in vitamin K, which can interfere with the effectiveness of warfarin. It is important for clients taking warfarin to maintain consistent levels of vitamin K intake to ensure the medication works properly. Foods rich in vitamin K, such as spinach, can counteract the effects of warfarin, leading to potential complications. Therefore, clients on warfarin are advised to either avoid or consume vitamin K-rich foods, like spinach, in consistent amounts to maintain the medication's efficacy. Bananas, oranges, and yogurt are not high in vitamin K and do not significantly impact the effectiveness of warfarin, making them safe options for clients taking this medication.

Correct Answer: A

Rationale: The correct answer is 'Muscle pain or tenderness.' This can be a sign of rhabdomyolysis, a serious side effect of statins like atorvastatin (Lipitor). Rhabdomyolysis is a condition in which muscle breakdown releases a protein that can damage the kidneys. Therefore, it is crucial for the client to report any muscle pain or tenderness immediately to prevent further complications. Choices B, C, and D are incorrect because they are not typically associated with atorvastatin (Lipitor) use or indicative of a serious adverse effect that requires immediate reporting.

Correct Answer: A

Rationale: The correct answer is A: Tachycardia. Tachycardia is a common sign of theophylline toxicity. The nurse should monitor the client for an increased heart rate, as it can indicate a dangerous level of theophylline in the body. Prompt medical attention is required if tachycardia is observed to prevent further complications. Choices B, C, and D are incorrect because constipation, drowsiness, and tremors are not typically associated with theophylline toxicity. While theophylline can cause gastrointestinal upset or central nervous system effects, tachycardia is a more specific and serious indicator of toxicity that requires immediate attention.

Correct Answer: B

Rationale: The correct answer is B. Using an electric razor is advised to prevent cuts, which is crucial for individuals taking warfarin due to the increased risk of bleeding associated with this medication. Lifestyle changes related to warfarin therapy focus on minimizing the risk of bleeding, and using safety measures such as an electric razor is a practical recommendation to reduce the likelihood of injury. Choices A, C, and D are incorrect. Avoiding prolonged sitting or standing is more related to preventing blood clots than to the bleeding risk of warfarin. Taking warfarin with a full glass of water is not a specific lifestyle change associated with its use. Eating a diet low in protein is not a typical recommendation for individuals on warfarin therapy.