International Journal of Impotence Research (2004) 16, 456–458 & 2004 Nature Publishing Group All rights reserved 0955-9930/04 $30.00 www.nature.com/ijir Case Report Analysis of retrograde ejaculation using color Doppler ultrasonography before and after transurethral collagen injection A Nagai*1, Y Nasu, M Watanabe, M Tsugawa, H Iguchi and H Kumon 1 Department of Urology, Okayama University Graduate School of Medicine and Dentistry, Okayama, Japan Transurethral bladder neck collagen injection therapy was performed in a patient with retrograde ejaculation. The phenomenon of retrograde ejaculation and its correction after the therapy were clearly demonstrated by color Doppler ultrasonography. To our knowledge this is the first report showing successful observation of retrograde ejaculation using color Doppler ultrasonography. International Journal of Impotence Research (2004) 16, 456–458. doi:10.1038/sj.ijir.3901202 Keywords: retrograde ejaculation; color Doppler ultrasound; collagen injection; spinal cord injuries; sexual dysfunction Introduction Retrograde ejaculation accounts for not only male infertility but also impaired sexual satisfaction. We report a case of retrograde ejaculation treated by transurethral collagen injection. The phenomenon of retrograde ejaculation and its correction after therapy were clearly demonstrated by color Doppler ultrasonography. Case report A 40-y-old male presented with retrograde ejaculation caused by incomplete spinal cord injury at the level of the thoracic vertebrae due to a traffic accident. He had been suffering from a slight gait disturbance and performed intermittent self-catheterization because of urinary retention for 6 y. He complained of lack of sexual satisfaction at orgasm due to the absence of antegrade ejaculation. No improvement of retrograde ejaculation was made by conventional oral medication including imipramine hydrochloride and antihistamines. A real-time ima- *Correspondence: A Nagai, MD, PhD. Department of Urology, Okayama University Graduate School of Medicine and Dentistry, 2-5-1 Shikata, Okayama 700-8558, Japan. E-mail: [email protected] Received 3 September 2003; revised 7 December 2003; accepted 26 January 2003 ging of the ejaculation was conducted using an ultrasonic image directed color Doppler system (Aloka SSD-2000) with a 7.5 MHz. electro-probe (UST-669). The probe was introduced into the rectum in the left lateral decubitus position. Ejaculation was induced by manual stimulation combined with audiovisual-sexual stimulation. These ejaculatory processes were observed before and after transurethral collagen injection. Before treatment, the prostatic urethra became distended immediately after seminal expulsion began. The inframontanal and distal prostatic urethra was distended into a globular-shaped sac filled with semen during expulsion. No relaxation of the external sphincter was observed during expulsion. There was no flow towards the bulbous urethra. At 2 s after the end of expulsion, the fluid in the prostatic urethra flowed slowly into the bladder (Figure 1). Transurethral collagen injection was performed under lumbar anesthesia. A total of 6.0 ml collagen was injected submucosally at 4-, 6- and 8-h positions at the bladder neck (Figure 2). At 14 days after surgery, the examination was repeated. The injected collagen was clearly detected at the neck of the bladder. The inframontanal and distal prostatic urethra was filled with semen during expulsion, followed by antegrade ejaculation (Figure 3). After surgery, the patient attained sexual satisfaction due to the commencement of normal antegrade ejaculation, but he complained of a gradual decrease of seminal volume 6 months postop. And retrograde ejaculation, the procedure same as before, reappeared 1 y after surgery. Therefore, collagen injection therapy was repeated and there were no complications. Analysis of retrograde ejaculation A Nagai et al 457 Figure 1 Color Doppler images of retrograde ejaculation: (a) bladder (b) and prostate (p) were normal before stimulation; (b) prostatic urethra (pu) opened at the beginning of expulsion from the seminal vesicle (sv); (c) inframontanal urethra dilated widely and was filled with semen during expulsion. Seminal flow through the ejaculatory duct was observed (black arrow); (d) At 2 s after the end of expulsion, semen in the inframontanal urethra slowly flowed into bladder (white arrow); (e) retrograde ejaculation lasted about 60 s; (f) posterior urethra and the bladder neck returned to normal 117 s after the end of expulsion. Figure 2 Transurethral collagen injection therapy: (a) The bladder neck before surgery; (b) collagen is injected submucosally using a 22-gauge needle (white arrow); (c) the bladder neck is narrowed after collagen injection. Figure 3 Color Doppler images of ejaculation after collagen injection therapy: (a) accumulation of collagen was observed in the prostate at the bladder neck; (b) pu opened at the beginning of expulsion from the sv; (c) inframontanal urethra dilated widely and seminal flow through the ejaculatory duct was observed (black arrow) during expulsion; (d, e) the bladder neck did not open and there was no seminal flow into the bladder; (f) flow of semen to the bulbous urethra was observed after the end of expulsion. International Journal of Impotence Research Analysis of retrograde ejaculation A Nagai et al 458 Comments To our knowledge, this is the first report of successful observation of retrograde ejaculation using color Doppler ultrasonography. Only one previous study of transrectal ultrasonographic imaging during ejaculation in a healthy male has been reported, demonstrating antegrade ejaculation.1 In the present patient, neither relaxation of the external sphincter nor contraction of the bladder neck was observed after the prostatic urethra was filled with semen. This suggested that detrusor sphincter dysynergia (DSD) might be responsible for retrograde ejaculation. Although DSD persisted after surgery, a sufficient pressure chamber can be created by collagen injection for a reasonable period of time. International Journal of Impotence Research Collagen injection for retrograde ejaculation resulting in pregnancy has been reported.2 The purpose of collagen injection in our patient was to achieve an antegrade ejaculation resulting in a satisfactory sexual relationship with the partner. Noninvasive dynamic observation of human ejaculation using Doppler ultrasound is feasible, providing a new method of diagnosing ejaculatory disorders. References 1 Gil-Vernet Jr JM et al. Ejaculation in men: a dynamic endorectal ultrasonographical study. Br J Urol 1994; 73: 442–448. 2 Reynolds JC et al. Bladder neck collagen injection restores antegrade ejaculation after bladder neck surgery. J Urol 1998; 159: 1303.
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