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Phleborheography--results of a ten-year experience.

Phleborheography (PRG) is a physiologic volumetric plethysmographic technique that was developed for the diagnosis of lower extremity deep venous thrombosis. During the past 10 years, 21, 626 extremities have been studied with 709 corresponding venograms. Overall data reveal a sensitivity of 92% (247/268) and specificity of 95% (418/441). There were 21 false negative PRG results, and 12 of these were due to isolated calf vein thrombosis. There were 23 false positive results, and 11 of these were considered true errors of the technique. When isolated calf vein thrombosis was disregarded, the sensitivity increased to 95%. PRG detected 45 of 57 (79%) isolated calf vein thrombi. The modified criteria for interpretation included respiratory waves and baseline elevation as the major criteria and prominent arterial pulsation and foot emptying as the minor criteria. PRG has recently been used to monitor the duration of thrombolytic therapy. While data are limited, this appears to be a promising contribution to the quantification of individual response to lytic therapy and may indicate an objective end point for treatment. PRG is a sensitive and specific method of detecting deep vein obstruction. It is a painless, reproducible, repeatable technique that requires minimal patient cooperation. PRG is a versatile laboratory technique that can be used for a variety of applications in addition to the diagnosis of deep vein thrombosis.