Evaluation of Seminal Vesicle Characteristics by Ultrasonography before and after Ejaculation

Abstract

Twenty males underwent transrectal ultrasonography before and after ejaculation to examine possible alterations that could influence interpretation of seminal vesicle ultrasonography. The preejaculation length of 35 mm was significantly (p < 0.05) decreased to 30 mm after ejaculation. The mean width of the seminal vesicles was 13 mm before and 11 mm after ejaculation. The seminal vesicle volume was significantly diminished after ejaculation (p < 0.05). It therefore seems important to maintain a period of abstinence when evaluating the seminal vesicles by ultrasonography.

Transrectal ultrasonography in infertile patients with persistently elevated bacteriospermia

“…6). In addition, the control group showed a mean difference of the vesicular antero-posterior diameter before and after ejaculation of 3 mm, which overlaps a value of 2 mm already reported (mean width of the seminal vesicles of 13 mm before and 11 mm after ejaculation) [11]. The clinical history, symptoms and signs, as well as results of the bacterial cultures of the patients enrolled, are summarized in Table 3.…”

“…In addition, although complete ejaculatory duct obstruction is a rare cause of male infertility, its main causes or abnormalities (midline cyst, Wolffian malformation, tuberculosis, previous genitourinary infection and idiopathic) are well-documented, and TRUS findings correlate well with vasography [7][8][9]. Incomplete or partial ejaculatory duct obstruction is diagnosed with increased frequency in male infertility with the advent of TRUS (mainly high resolution TRUS technology), and although there are no specific findings associated to this disorder, several clinical findings are highly suggestive of its presence [10][11][12][13][14]. For this reason, we found it worthwhile to evaluate the above and other ultrasound findings.…”

Prediction of prostate cancer extracapsular extension with high spatial resolution dynamic contrast-enhanced 3-T MRI

“…A minimum of 3 weeks was required between the date of the MRI exam and the previous biopsy to reduce the influence of postbiopsy changes in diagnostic accuracy 44 . Patients were asked to refrain from ejaculation for 3 days preceding the exam to maximize distension of the seminal vesicles 45 .A sodium phosphate enema was administered within 2 hours of the study in order to minimize fecal residue in the rectum. A 1 mg glucagon i.m.…”

Anatomic Imaging of the Prostate

“…They lay between the bladder and rectum, just caudolateral to the corresponding deferent duct. Their size may vary depending on age and postejaculatory condition [18]. The caudal tip of each seminal vesicle joins the corresponding deferent duct to form the ejaculatory duct, which is enveloped in a thick low T2 signal-intensity muscular coat and traverses the central zone of the prostate to terminate at the verumontanum (Figures 2(c), 3, and 5).…”