This study aims to evaluate the accuracy of Duplex Ultrasound (DUS) in assessing infra inguinal arterial lesions in patients with chronic threatening limb ischemia compared with digital subtraction angiography (DSA) as the reference standard. By comparing sensitivity, specificity, and predictive values across arterial segments, the study seeks to determine the clinical utility of DUS as a non-invasive alternative for pre-intervention vascular mapping in chronic limb-threatening ischemia.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
50
* Peak systolic velocity (PSV) * Velocity ratios * Segment visualization quality * Degree of stenosis
Sohag University Hospital
Sohag, Sohag Governorate, Egypt
Diagnostic accuracy of DUS compared to DSA in detecting ≥50% stenosis or occlusion in femoral, popliteal, and infra popliteal arteries.
sensitivity, specificity, positive predictive value, negative predictive value
Time frame: from enrollment till angioplasty (14 days mostly)
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