Diagnostic approaches for detecting deep vein thrombosis

Area of Science:

• Vascular Medicine
• Diagnostic Imaging

Background:

• Acute deep vein thrombosis (DVT) diagnosis necessitates objective confirmation.
• Current methods like Doppler and impedance plethysmography have limitations, especially below the knee.

Purpose of the Study:

• To evaluate the diagnostic performance of ultrasonic duplex scanning for acute deep vein thrombosis.
• To compare duplex scanning with other diagnostic modalities for DVT.

Main Methods:

• Utilized continuous-wave Doppler, impedance plethysmography, and ultrasonic duplex scanning.
• Duplex scanning assessed thrombus visualization, vein compressibility, and venous blood flow.
• Diagnostic accuracy was determined using sensitivity and specificity metrics.

Main Results:

• Duplex scanning demonstrated high sensitivity and specificity (90-100%) for DVT detection.
• Limitations of Doppler and plethysmography include inability to assess distal DVT accurately.
• False positives with duplex scanning were noted in iliac and superficial femoral veins; false negatives in calf veins.

Conclusions:

• Ultrasonic duplex scanning is a highly accurate method for diagnosing deep vein thrombosis throughout the venous system.
• Duplex scanning provides superior anatomical detail and diagnostic confidence compared to Doppler and plethysmography.
• Careful application of diagnostic criteria is essential to minimize false positives and negatives in specific venous segments.