Introduction

An inflatable penile prosthesis (IPP) is a medical device used to treat erectile dysfunction. It is surgically implanted in the penis to help men achieve and maintain an erection suitable for sexual activity.

The device has inflatable cylinders that can be filled with fluid to create an erection by utilizing a pump surgically placed in the scrotum. When the erection is no longer needed, a valve is used to release the fluid back into a reservoir where it remains until it needs to be used again.

Although IPP is effective and has high satisfaction rates, little is known about its use during anal intercourse, particularly in men who have sex with men. A new study aims to determine the maximum force exerted during anal penetration to provide valuable information for clinicians and patients considering IPPs. Understanding this mechanical stress is crucial for ensuring device effectiveness and patient satisfaction.

Methods

Researchers, with Institutional Review Board approval, studied 6 men who have sex with men engaging in anal intercourse. Using a hand-held force gauge device, they measured forces applied to a silicone phallus simulating the average male size during anal penetration. Participants were positioned with flexed hips and their elbows resting on a table, and the device was inserted into the anal canal for five measurements. The force gauge was calibrated, sterilized, and covered with a condom before each use. Descriptive statistics were calculated for demographic and survey data.

Results

The study included participants aged 52 to 64, all identifying as white gay men. They reported varying frequencies of receptive anal intercourse. The average maximum force during anal penetration was 26.5 Newtons (2.7 kilograms), with individual forces ranging from 16.1 to 51.7 Newtons (1.64 to 5.27 kilograms). Participants engaging less often in receptive anal intercourse tended to have higher forces (41.6 N or 4.24 kg) than those with more frequent engagement (25.7 N or 2.62 kg). These findings offer insights into the forces associated with anal intercourse in this population.

Discussion & Conclusion

The study compared forces during anal penetration to existing data on penile prostheses, providing insight into the mechanical aspects. Previous studies on vaginal penetration were referenced, citing forces between 500-1500 grams. The study measured forces in a sample of men with inflatable penile prostheses (IPP) during anal penetration, recording a median force of 26.5 Newtons (2.7 kilograms). This force exceeded historical values for vaginal penetration, suggesting the importance of careful IPP inflation for those engaging in anal intercourse. However, limitations and other confounders, including a small sample size and variations in study methodologies, were acknowledged. The study highlights the need for further research on safe IPP use during anal intercourse for better patient counseling.

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Radical prostatectomy is a surgery to remove the entire prostate gland that is often performed to treat prostate cancer. One common side effect of radical prostatectomy is erectile dysfunction (ED), because the nerves that control erections may be affected. Therefore, most medical experts recommend that patients complete a penile rehabilitation program to regain erectile functioning after this procedure.

Join us in our mission to be the most respected and trusted source of information, education, and professional development on human sexual health by delivering world-class quality publications, research findings, and opportunities for knowledge exchange initiated by the ISSM Scientific Review Committee. 

We are looking for Subcommittee Members to contribute to a Systematic Review on the Safety and Efficacy of Injection Therapies for Erectile Dysfunction. Send your application the latest February 27, 2024.

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Sexual health issues are common, yet individuals often hesitate to seek help. In certain populations, especially those with medical conditions, sexual dysfunction is prevalent. Mental well-being is linked to sexual health, with depression and anxiety both impacting and being impacted by sexual issues.

The ISSM Scientific Review Committee is calling for applications to join the Subcommittee tasked with conducting a comprehensive Systematic Review on the Safety and Efficacy of Injection Therapies for Erectile Dysfunction Co-chaired by Matthew Ziegelmann (USA) and Eric Chung (Australia), the subcommittee aims to publish its findings in the Journal of Sexual Medicine (JSM).

This is a unique chance for ISSM Members to contribute to advancing knowledge in sexual health actively.

Don't miss out – Apply Before February 27, 2024

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