duplex ultrasonography
Pronunciation: DUH-pleks ul-trah-son-OG-rah-fee
Non-invasive imaging technique combining B-mode ultrasound with Doppler flow assessment for arterial evaluation.
Full Definition
Duplex ultrasonography is a cornerstone imaging modality in arterial vascular assessment that combines real-time B-mode (brightness-mode) ultrasound imaging with pulsed-wave Doppler spectral analysis. This technique allows simultaneous visualization of vessel anatomy and measurement of blood flow velocities. The B-mode component provides cross-sectional and longitudinal images of arterial walls and luminal contents, while the Doppler component quantifies flow patterns and velocities. It is particularly valuable for detecting stenosis, monitoring stent patency, and assessing peripheral arterial disease progression.
Usage
Usage note: Often abbreviated as 'duplex' in clinical contexts; ensure distinction from simplex Doppler studies.
In Context
- "The duplex ultrasonography revealed a 70% stenosis in the proximal superficial femoral artery." — Radiology report
- "Follow-up duplex ultrasonography at six months showed excellent stent patency with normal flow velocities." — Clinical assessment