A client is admitted to the hospital with symptoms suggestive of deep vein thrombosis (DVT). Which test can provide rapid results to rule out DVT and guide further diagnostic workup?

A) This choice is incorrect because palpating the pulses in the extremities primarily assesses arterial blood flow, not venous thrombosis. While pulse assessment is essential, it is not the priority for identifying DVT-related manifestations.

B) This choice is correct. Measuring calf and thigh circumference can help identify possible DVT by comparing the affected leg's size to the unaffected one. DVT can cause localized swelling in the affected limb.

C) This choice is incorrect because auscultating the lungs for crackles is not a specific assessment for DVT. Crackles may be present in pulmonary edema, which can be a complication of DVT, but they do not directly assess the presence of a blood clot in the veins.

D) This choice is incorrect because performing a capillary refill test is primarily used to assess peripheral perfusion and is not specific to DVT assessment.

A) This choice is incorrect because the D-dimer blood test is a screening test for DVT but does not directly assess blood flow or detect clots non-invasively.

B) This choice is incorrect because magnetic resonance imaging (MRI) is a sensitive imaging modality, but it may not be readily available or suitable for all clients. It is not the primary choice for non-invasive assessment of blood flow and clots in suspected DVT.

C) This choice is incorrect because contrast venography is an invasive procedure involving the injection of contrast dye and X-ray imaging. It is not non-invasive, and venous Doppler ultrasound is a preferred first-line test.

D) This choice is correct. Venous Doppler ultrasound is a non-invasive imaging test used to assess blood flow in the veins and detect clots in the deep veins of the legs. It is readily available, safe, and does not involve the use of contrast dye or radiation.