A nurse is caring for a client who reports an area of redness, warmth, tenderness and pain in the right calf. The nurse anticipates which of the following orders when notifying the provider of this finding?

Rationale: A. Monitor Homan's sign: Homan's sign is no longer recommended for assessing deep vein thrombosis because it is unreliable and can be falsely positive or negative. In addition, forcibly dorsiflexing the foot may dislodge a clot, increasing the risk of embolization. B. Obtain a venous duplex ultrasound: A venous duplex ultrasound is the most accurate, noninvasive test for confirming deep vein thrombosis. It visualizes blood flow and identifies the presence of thrombi, making it the diagnostic tool of choice in this situation. C. Obtain impedance plethysmography: Impedance plethysmography can detect venous obstruction but is less sensitive and less commonly used than duplex ultrasound. It has largely been replaced by duplex imaging as the preferred diagnostic method for DVT. D. Apply cold therapy to the affected leg: Cold therapy is not indicated for suspected DVT and may worsen discomfort without addressing the underlying problem. The priority is diagnostic confirmation and medical management, not local therapy.