The radiographic demonstration of the dynamic transfer of radio-opaque material from the differential vein to the prostate in the dog.

Radio-opaque contrast medium was injected into the deferential vein of the dog in vivo and was seen to pass, in two of five animals, into the intrinsic veins of the prostate and the cavernous tissue of the prostatic urethra. In other cases an increase in abdominal venous pressure was required to bring about the retrograde flow. The observations support the… (More)