Related Experiment Videos
[Venous reflux: Measurement variability due to positional differences].
Kamran Mahmutyazicioğlu1, Sadi Gündoğdu, Hüseyin Ozdemir
1Zonguldak Karaelmas Universitesi Tip Fakültesi, Radyodiagnostik Anabilim Dali, Kozlu, Zonguldak.
Tanisal Ve Girisimsel Radyoloji : Tibbi Goruntuleme Ve Girisimsel Radyoloji Dernegi Yayin Organi
|January 21, 2004
Summary
The standing position and compression maneuver significantly reduce false positive reflux diagnoses in femoral veins. Standing examinations and the compression-release maneuver offer more reliable results for venous insufficiency evaluation.
Area of Science:
- Vascular Medicine
- Diagnostic Imaging
- Ultrasound Technology
Background:
- Venous reflux in the common femoral vein (CFV) and superficial femoral vein (SFV) is a key indicator of venous insufficiency.
- Accurate measurement of reflux times is crucial for diagnosis and treatment planning.
- Current diagnostic methods may be subject to variations based on patient positioning and provocative maneuvers.
Purpose of the Study:
- To assess the impact of patient position (supine vs. standing) on femoral vein reflux measurements.
- To compare the effectiveness of Valsalva maneuver (VM) and compression-release maneuver in provoking and measuring venous reflux.
- To determine the most reliable method for evaluating venous reflux and preventing false positive diagnoses.
Main Methods:
- Fifty healthy subjects (25 male, 25 female) aged 22-57 underwent duplex ultrasound examinations.
- Reflux times in the CFV and SFV were measured in both supine and standing positions.
- Three provocation methods were used: supine VM, standing VM, and standing compression-release maneuver.
Main Results:
- A reflux time of ≥1 second was observed in 29% of CFV measurements in the supine position, decreasing to 5% when standing.
- The prevalence of reflux lasting <0.5 seconds was highest with the standing compression maneuver (97%), followed by standing VM (84%) and supine VM (27%).
- Mean reflux times were significantly lower in the standing position compared to the supine position for both CFV and SFV.
Conclusions:
- Supine examinations are associated with a high probability of false positive diagnoses for pathological venous reflux.
- Transitioning patients to a standing position when supine examination shows reflux >1 second improves diagnostic reliability.
- The compression-release maneuver in the standing position demonstrated the lowest false positive reflux prevalence, making it the most reliable method for assessing venous insufficiency.