[Paradoxical constellations in Doppler sonographic reflux diagnosis].
What we call a paradoxical phenomenon means the constellation of negative Valsalva proximally and positive Valsalva distally in the course of a single venous stem or two successive veins. The explanation of this phenomenon is of fundamental methodological importance, because the existence of true paradoxical refluxes would call into question the reliability of the Doppler technique. We have found five paradoxical phenomena in certain regions of the leg. By means of systematic, superficial and deep Doppler examination, it is possible to explain these phenomena by eight different reflux types. The existence of refluxes coming from extrapelvic branches of the internal iliac vein has been unknown till now, because they are not recognizable by way of routine venographies. Our findings emphasize the high value of the Doppler technique regarding clarification and explanation of the connections between functionally disturbed veins.
D006801:Humans; D007866:Leg / Q000098:blood supply*; D014465:Ultrasonics; D014463:Ultrasonography; D014680:Veins / Q000503:physiopathology*
Paradoxe Konstellationen bei der dopplersonographischen Refluxdiagnostik.