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R Ravasini

Publications and source records attributed to R Ravasini.

At least 37 records · Page 2Linked to original sources
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[Duplex study of primary venous insufficiency of the legs. First results and methodologic comparison].

Primary venous insufficiency is a pathologic condition characterized by reflux in the deep venous system not secondary to phlebothrombosis. The authors compare the diagnostic capabilities of duplex and Doppler US in the evaluation of this condition. At present, Doppler US has a more widespread use than the duplex method. Both lower limbs were examined in 46 patients known to be affected with mono/bilateral primary venous insufficiency thanks to previous retrograde phlebography. Ten patients with different phlebopathies and 10 healthy volunteers were also studied as a control group, duplex US had 92% sensitivity and 90% specificity, while Doppler had 86% and 75%, respectively. Duplex US appeared to be more accurate than Doppler in locating and quantifying the reflux. Finally, the authors draw attention to the segmentary reflux phenomenon they observed in asymptomatic patients and suggest the possibility of recognizing the preclinic stage of this condition by duplex US, which is a non-invasive and relatively inexpensive method. The latter could become, thanks to its intrinsic characteristics, the method of choice for monitoring.

Adult↗
PubMedDate not supplied

[First experience with the combination of ultrasonics and pulsed Doppler (Duplex system) in the study of venous pathologies of the legs].

Over a 2-year period the authors examined 400 patients affected with different types of phlebopathies with combined real-time US and pulsed Doppler (Duplex system). Ninety-eight patients had deep phlebothrombosis, 45 had superficial phlebothrombosis, and 110 primitive or secondary vein insufficiency. The obtained data, supported in 171 cases by contrastographic findings, allowed both the semeiological study and the evaluation of the indications for Duplex US in the various phlebopathies. The combination of high-resolution US morphological data, dynamic tests, and the functional data from pulsed Doppler have particular interest in the study of: a) the diagnostics of superficial or deep thrombosis and adhesive or floating thrombi; b) post-thrombotic syndrome; c) primitive or secondary vein insufficiency; d) the ostium of the superficial venous system (location, morphology, functionality). Duplex US is a non-invasive technique for the examination of the superficial and the deep venous systems, which reduces the indications for phlebography, an exam which requires radiation exposure, and is not always safe or possible. Duplex US is however limited by the difficult assessment of the venous system below the knee, because of too many trunks and variants.

Adult↗