Question

All of them are confirmatory tests for diagnosis of Deep Vein Thrombosis except ______. The sensitivity of this test is considered to be poor and may reflect a false positive or false negative finding.

• A. Homan's Sign
• B. Ultrasonography
• C. Venous duplex screening
• D. Venography

Hint:

Homan's sign = Screening only (unreliable) Venography = Gold standard for DVT

Answer 1

The Correct Option is A

Concept:
Deep Vein Thrombosis (DVT) is the formation of a thrombus (blood clot) in deep veins, usually in the lower limbs. Diagnosis requires accurate and reliable tests because complications like pulmonary embolism can be life-threatening. Diagnostic methods for DVT include:
• Clinical tests (less reliable): e.g., Homan's sign
• Imaging tests (confirmatory): Ultrasonography, Duplex scan, Venography

Step 1: Understanding Homan's Sign.
Homan's sign is elicited by dorsiflexing the foot:
• Pain in calf → considered positive However:
• It has low sensitivity and specificity
• Can give false positives (e.g., muscle strain)
• Can give false negatives

Step 2: Understanding confirmatory tests.

• Ultrasonography → widely used, non-invasive
• Venous duplex → combines Doppler + imaging
• Venography → gold standard These are reliable diagnostic tools.

Step 3: Evaluating options.

• Homan's sign → unreliable → NOT confirmatory
• Ultrasonography → confirmatory
• Venous duplex → confirmatory
• Venography → gold standard

Step 4: Conclusion.
Thus, the test with poor sensitivity and not confirmatory is: \[ \boxed{\text{Homan's Sign}} \]