TENACIO inflatable penile prosthesis pump fills faster compared with MS pump

The TENACIO pump was found to be significantly faster at filling and also pumps with significantly greater efficiency vs the MS pump, according to research presented at the 2024 Sexual Medicine Society of North America Fall Scientific Meeting in Scottsdale, Arizona.

The AWS was found to be significantly higher for the TENACIO pump for all 3 tasks compared to the MS pump.

In terms of background, the authors, led by Justin Lee, MD, a urology resident at Columbia University Irving Medical Center in New York, New York, explained, “Inflatable penile implant (IPP) pumps can be difficult to inflate, especially in older men.” In an ex-vivo, bench-top, head-to-head trial, they sought to compare the muscular effort required to operate the TENACIO and MS pumps.

Using identical AMS 700 IPPs, 3 task were performed. The first task was to fill from empty to maximum (defined as 3 consecutive pumps where the pump is not fully compressed). The second task was 10 full pump squeezes (complete refill of pump bulb between pumps). The third task was to fill from 10 mL to 40 mL.

Surface electromyography (sEMG) data were “collected from the thenar, flexor digitorum superficialis, and extensor digitorum muscles,” according to the authors.

“The sEMG was normalized to the participant’s own max voluntary contraction (MVC) for each muscle group. Cumulative muscular workload (CMW) was calculated as time integral of the MVC. Average muscular work per second (AWS) was calculated by dividing CMW by time to completion,” wrote the authors.

A total of 10 participants performed the 3 tasks. The investigators reported that the time to completion was significantly faster when using the TENACIO pump for all 3 tasks vs the MS pump. In addition, the AWS was found to be significantly higher for the TENACIO pump for all 3 tasks compared to the MS pump.

“Our bench top study utilized surface electromyography to understand the muscular effort required to complete various ex-vivo tasks involving cycling identical penile implants,” Lee commented in correspondence with Urology Times®. "We found that the new TENACIO pump was able to complete tasks faster and more efficiently compared to the older MS pump. This is an exciting finding that suggests the newer pump might be easier to use, but needs to be confirmed in the in-vivo setting after implantation in humans.”

“Future studies are needed to understand efficacy in-vivo and patient satisfaction with this pump,” concluded the authors.

REFERENCE

1. Lee J, Schoenfeld D, Joice G. Comparison of TENACIO™ Pump and MS™ Pump efficiency using surface electromyography (sEMG). Presented at: 2024 Sexual Medicine Society of North America Fall Scientific Meeting. October 17-20, 2024. Scottsdale, Arizona. Abstract 320