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Ejaculation in men: a dynamic endorectal ultrasonographical study.
Br J Urol. 1994 Apr; 73(4):442-8.BJ

Abstract

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 pre-ejaculatory phase characterized by a notable decrease in echogenicity of the inner prostate gland, due to the contraction of the pre-prostatic sphincter 13-25 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.

Authors+Show Affiliations

Sant Josep Clinic, Barcelona, Spain.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Case Reports
Journal Article

Language

eng

PubMed ID

8199835

Citation

Gil-Vernet, J M., et al. "Ejaculation in Men: a Dynamic Endorectal Ultrasonographical Study." British Journal of Urology, vol. 73, no. 4, 1994, pp. 442-8.
Gil-Vernet JM, Alvarez-Vijande R, Gil-Vernet A, et al. Ejaculation in men: a dynamic endorectal ultrasonographical study. Br J Urol. 1994;73(4):442-8.
Gil-Vernet, J. M., Alvarez-Vijande, R., Gil-Vernet, A., & Gil-Vernet, J. M. (1994). Ejaculation in men: a dynamic endorectal ultrasonographical study. British Journal of Urology, 73(4), 442-8.
Gil-Vernet JM, et al. Ejaculation in Men: a Dynamic Endorectal Ultrasonographical Study. Br J Urol. 1994;73(4):442-8. PubMed PMID: 8199835.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Ejaculation in men: a dynamic endorectal ultrasonographical study. AU - Gil-Vernet,J M,Jr AU - Alvarez-Vijande,R, AU - Gil-Vernet,A, AU - Gil-Vernet,J M, PY - 1994/4/1/pubmed PY - 2001/3/28/medline PY - 1994/4/1/entrez SP - 442 EP - 8 JF - British journal of urology JO - Br J Urol VL - 73 IS - 4 N2 - 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 pre-ejaculatory phase characterized by a notable decrease in echogenicity of the inner prostate gland, due to the contraction of the pre-prostatic sphincter 13-25 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. SN - 0007-1331 UR - https://www.unboundmedicine.com/medline/citation/8199835/Ejaculation_in_men:_a_dynamic_endorectal_ultrasonographical_study_ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0007-1331&date=1994&volume=73&issue=4&spage=442 DB - PRIME DP - Unbound Medicine ER -