New Device Can Instantly Turn Sperm-Flow On and Off

1. 13. 16 by Sarah Marquart
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Imagine, being able to turn your fertility on and off with the flick of a switch.

That’s basically what a Clemens Bimek, a German carpenter has invented: A switch which can turn off the flow of sperm from a man’s testicles, making him temporarily infertile. It’s called the Bimek Spermatic Duct Valve, or the Bimek SLV.

Instant Contraception

The idea first came to Bimek about 20 years ago, when he was watching a documentary about contraception. He began to wonder whether a simple valve could be used to control the flow of sperm. After discovering that no one had filed a patent for such a device, he decided to develop his own.

Bimek states that, initially, it was difficult to get doctors to take his idea seriously. However, “there were some who encouraged me to go on tinkering and helped me with their expertise,” Bimek asserts.

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His persistence was worth it.

How it Works
Bimek SLV

The valve is surgically implanted on the vas deferens, the ducts which carry sperm from the testicles, during a simple half hour operation.

Each spermatic duct is transected, then the newly cut ends are connected to the valve casing. The spermatic ducts are then put back into the scrotum and the inner and outer dermal layers are sealed. The device is less than an inch long and weighs less than a tenth of an ounce, or, “as small as a gummy bear.”

Bimek SLV

This is an outpatient procedure, meaning you can head home the same day. It is also done under local anesthetic.

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To use the switch, the man can reach under the skin of his scrotum and simply turn the switch on or off.

Better than a Vasectomy?

Hartwig Bauer, the urologist who carried out the surgery, said the valve was preferable to a vasectomy. “A third of patients want to have the operation reversed later, but it doesn’t always work,” he said.

Other benefits of the implant include:

  • No need for hormones
  • The Bimek SLV can be worn for a lifetime
  • Anti-allergenic
  • 100% vegan
  • Implants made from the same material have been well-tolerated in the body

This might sound like an ideal answer to all contraception issues; however, some doctors have expressed concern over the new technology.

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“My assessment is that implanting the valve could cause scarring where it meets the vas deferens,” Wolfgang Bühmann, spokesman for the Professional Association of German Urologists, said. Scarring could prevent sperm from flowing even when the valve is open. In addition, the valve could become clogged if left in the “off” position for too long. 

The Bimek SLV is set to be available to the public in 2018.

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