Which method is NOT a recommended diagnostic tool for DVT?

A physical examination alone is not a recommended diagnostic tool for deep vein thrombosis (DVT) due to its limitations in accurately diagnosing the condition. While certain physical findings, such as swelling, tenderness, and warmth of the affected limb, may raise suspicion for DVT, these signs are not specific enough to confirm a diagnosis. Many conditions can present with similar symptoms, making reliance on physical examination alone insufficient.

In contrast, venous duplex ultrasound is the standard imaging modality for diagnosing DVT, as it can visualize blood flow in the veins and detect clots. D-dimer testing can be useful in conjunction with clinical assessment to rule out DVT in low-risk patients; elevated levels suggest further testing is warranted. Venography, though less commonly used today due to the high sensitivity and availability of ultrasound, is still a valid invasive option for diagnosing DVT when other methods are inconclusive. All these techniques combined enhance the accuracy of diagnosing DVT, while a physical examination lacks the specificity and sensitivity required for reliable detection.