Deep Vein Thrombosis Diagnostic Tests
The question asks to identify which option is NOT a confirmatory test for diagnosing Deep Vein Thrombosis (DVT), noting one option's poor sensitivity and potential for inaccurate findings.
Understanding Homan's Sign
Homan's Sign is a physical examination maneuver, not a definitive diagnostic test. It involves eliciting calf pain upon passive dorsiflexion of the foot.
- Reliability Issues: This clinical sign is known for its low sensitivity and specificity.
- Inaccurate Results: It frequently leads to both false positive and false negative results, making it unreliable for confirming DVT.
Confirmatory DVT Diagnostic Methods
Confirmatory tests provide conclusive evidence of DVT. The other options listed are established diagnostic procedures:
- Venography: Historically considered the gold standard, this invasive procedure uses contrast dye and X-rays to visualize deep veins and detect blockages.
- Ultrasonography: This non-invasive imaging technique, particularly Doppler or Duplex ultrasound, is highly sensitive and specific for detecting DVT by visualizing the vein walls and blood flow.
- Venous duplex screening: This is essentially a type of ultrasonography specifically used to evaluate the venous system for clots, serving as a confirmatory test.
Given its lack of reliability and potential for inaccurate results, Homan's Sign is the exception among the listed options for confirming DVT.
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- What is the key guide to statecraft in the realist tradition?
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Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
