AN ANALYSIS OF 653 TRIALS OF PENILE VIBRATORY STIMULATION IN MEN WITH SPINAL CORD INJURY
The Journal of Urology Copyright © 1998 by American Urological Association, Inc.
BRACKETT, NANCY L.; FERRELL, SEAN M.; ABALLA, TEODORO C.; AMADOR, MARIA J.; PADRON,OSVALDO F.; SONKSEN, JENS; LYNNE, CHARLES M.
From the Miami Project to Cure Paralysis and Department of Urology, University of Miami School of Medicine, Miami, Florida, and Department of Urology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark Accepted for publication December 12, 1997.
Supported in part by grants from the State of Florida and The Miami Project to Cure Paralysis.(BRACKETT) Requests for reprints: The Miami Project to Cure Paralysis, University of Miami School of Medicine, P.O. Box016960, R-48, Miami, Florida 33136.
Abstract Purpose: We evaluated ejaculatory response and semen quality in 653 trials of penile vibratory stimulation in 211 men with spinal cord injury, and compared results with low versus high amplitude vibratory stimulation.
Materials and Methods: Low and/or high amplitude penile vibratory stimulation was performed 1 to 27 times in each patient, and antegrade and retrograde specimens of those who ejaculated were analyzed.
Results: Significantly more patients ejaculated using high (54.5%) versus low (39.9%) amplitude stimulation. Using either amplitude the ejaculatory success rate was highest in men with injuries at C3 to C7, followed by T1 to T5, T6 to T10 and T11 to L3. While high amplitude stimulation increased the ejaculatory success rate in each group, the highest rate occurred in men with injuries at C3 to C7 (65.6%). Ejaculation was reliable, since most men who ejaculated did so during 100% of the trials and within 2 minutes of stimulation onset. Symptoms of autonomic dysreflexia were safely managed with nifedipine. All patients who ejaculated produced antegrade specimens. With the exception of ejaculate volume, which was significantly higher with high versus low amplitude stimulation, semen parameters were similar using both vibrator amplitudes.
Conclusions: Ejaculatory success is better while semen quality is similar using high versus low amplitude penile vibratory stimulation in men with spinal cord injury. This method may be considered first line treatment for anejaculation in men with spinal cord injury. This method may be relative effectiveness, and relatively low investment of time and money.
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Clinical and research concerns with vibratory stimulation: a review and pilot study of common stimulation devices
The parameters of vibrators used for sexual stimulation in laboratory settings and therapeutic contexts are usually unknown. The unidentified range of vibrator characteristics commonly used for sexual stimulation would help identify
appropriate vibrator for different purposes and clients. Seven vibrators used for sexual stimulation were tested using a piezoelectric accelerometer mounted on their housing to quantify frequency, displacement, and acceleration of each.
Vibratory frequency ranged from 43 to 148 Hz
“Women with spinal cord injuries (SCIs) have predictable alterations in sexual responses. They commonly have a decreased ability to achieve genital sexual arousal. This study determined whether the use of vibratory stimulation would result in increased genital arousal as measured by vaginal pulse amplitude in women with SCIs. Subjects included 46 women with SCIs and 11 nondisabled control subjects. Results revealed vibratory clitoral stimulation resulted in increased vaginal pulse amplitude as compared with manual clitoral stimulation in both SCI and nondisabled subjects; however
We support the right of men with disabilities such as spinal cord injury (SCI) or ejaculatory dysfunction to have children or enjoy a healthy sex life.
Towards that end, we collaborate with leading medical institutions in the research and development of non-invasive products to facilitate ejaculation and the treatment of male infertility, using penile vibratory stimulation – PVS (also designated TMNS – Transcutaneous Mechnical Nerve Stimulation).
We welcome you to learn more about our FertiCare Personal Vibrator, Viberect, and Intimate Rider products, and our efforts in this field by exploring our website.
The Concept of Penile Vibratory Stimulation (PVS)
While maintaining a healthy sex life is important to many people, the ability to ejaculate is decreased after spinal cord injury. This is the primary cause of infertility in spinal cord injured men. The use of the vibration concept has proven effective in the treatment of infertility. While the technique is often performed initially in a clinical setting, it can also be performed at home – as is being done by more than a thousand men world-wide.
The Medical Explanation
To induce ejaculation by penile vibratory stimulation (PVS) requires an intact ejaculatory reflex arch to provide transmission of afferent stimuli from penis to the sacral, lumbar and lower thoracic segments of the spinal cord, and efferent stimuli from these segments to the ejaculatory organs. The above mentioned spinal cord segments will, even when isolated from the brain, respond to PVS.