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Ejaculation in men: a dynamic endorectal ultrasonographical study
Author(s) -
GILVERNET J. M.,
ALVAREZVIJANDE R.,
GILVERNET A.,
GILVERNET J. M.
Publication year - 1994
Publication title -
british journal of urology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.773
H-Index - 148
eISSN - 1464-410X
pISSN - 0007-1331
DOI - 10.1111/j.1464-410x.1994.tb07612.x
Subject(s) - ejaculation , medicine
Objective To study the ejaculatory mechanisms in men using a dynamic endorectal ultrasonographical approach. Subjects and methods Seven recordings were made of a young healthy volunteer during ejaculation, scanning the longitudinal plane from the bladder neck to the bulbous urethra. Results The 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. Conclusions Endorectal ultrasonographical imaging during ejaculation, a recently developed diagnostic procedure, may provide a new approach to ejaculation‐related problems.