A nurse is providing education to a client about the risk factors for deep vein thrombosis (DVT). Which statement made by the client indicates a need for further teaching?

A) This choice is incorrect because auscultating the lungs for crackles is not directly related to confirming the presence of deep vein thrombosis (DVT). Lung auscultation may be performed to assess for potential complications of DVT, such as pulmonary embolism.

B) This choice is correct. Homans' sign is a clinical test used to assess for the presence of DVT. The nurse flexes the client's knee and gently dorsiflexes the foot. A positive Homans' sign is indicated by calf pain or discomfort during dorsiflexion and may suggest the presence of a blood clot in the deep veins of the leg.

C) This choice is incorrect because measuring blood pressure in both arms is not a specific assessment for deep vein thrombosis (DVT). It may be done as part of a routine assessment but does not confirm the presence of DVT.

D) This choice is incorrect because performing a capillary refill test is not specific to DVT assessment. Capillary refill is a measure of peripheral perfusion and may be useful in assessing overall circulatory status, but it does not directly confirm the presence of DVT.

A) This choice is incorrect because monitoring prothrombin time (PT) and international normalized ratio (INR) is more relevant to monitoring oral anticoagulant therapy (e.g., warfarin) and not intravenous heparin therapy.

B) This choice is incorrect because while liver function tests may be important for some medications, they are not the priority for clients on intravenous heparin therapy. Heparin is primarily eliminated by the kidneys.

C) This choice is incorrect because while administering heparin via a central venous catheter is possible, it is not the priority action for safe administration. Monitoring the client's response to heparin therapy is more important.

D) This choice is correct. Monitoring the client's activated partial thromboplastin time (aPTT) is the priority action when administering intravenous heparin. The aPTT reflects the client's response to heparin and helps adjust the dosage to achieve the desired therapeutic effect while minimizing the risk of bleeding.