Ejaculation in men: a dynamic endorectal ultrasonographical study

Publisher Website
Google Scholar
Abstract
ObjectiveTo study the ejaculatory mechanisms in men using a dynamic endorectal ultrasonographical approach.Subjects and methodsSeven recordings were made of a young healthy volunteer during ejaculation, scanning the longitudinal plane from the bladder neck to the bulbous urethra.ResultsThe study demonstrated the existence of a preejaculatory phase characterized by a notable decrease in echogenicity of the inner prostate gland, due to the contraction of the pre‐prostatic sphincter 13‐2 5 s before ejaculation. Several stages were recorded including an ejaculatory stage with an initial prostatic emission phase lasting 2–20 s and a posterior emission phase through the ejaculatory ducts lasting 3–14 s, with a seminal stoppage of 3–8 s. and finally a urethro‐vesical reflux of a minimal fraction of the ejaculate over 5–9 s. The bladder neck and inner gland returned to their resting configuration between 10 and 90 s after ejaculation.ConclusionsEndorectal ultrasonographical imaging during ejaculation, a recently developed diagnostic procedure, may provide a new approach to ejaculation‐related problems.