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- A vacuum device draws blood into the penis; a ring at the base keeps it there.
- It works whatever the cause of ED, including after prostate surgery and with diabetes.
- Buy a medical-grade device with a vacuum limiter, not a novelty "enlargement" pump.
- Never leave the ring on for more than 30 minutes.
How it works
A vacuum erection device (VED) has three parts: a clear plastic cylinder that goes over the penis, a pump (hand-operated or battery-powered) that pulls air out of the cylinder, and a stretchy constriction ring.
As the pump creates a vacuum, blood is drawn into the penis and it becomes erect. You then slide the ring from the cylinder onto the base of the penis to keep the blood in, and take the cylinder off. The whole thing takes a few minutes once you've practised.
Does it actually work?
Yes, for most men. Vacuum devices are one of the standard treatments in the American Urological Association's ED guideline. Because they work mechanically rather than through nerves or hormones, they can help when tablets don't, for example after prostate cancer surgery, or with diabetes or nerve damage.
The catch is satisfaction. Studies report a very wide range: some couples are happy with it long-term, while others stop because it feels unspontaneous, or because the erection is cooler and "hinges" at the base. It helps to see it as a tool rather than a perfect copy of a natural erection.
Who it suits
- Men who can't take sildenafil or tadalafil, for example because they take nitrates.
- Men for whom tablets haven't worked well enough.
- Men recovering from prostate surgery. Some urologists also use VEDs during recovery to help keep the tissue healthy.
- Men in a steady relationship, where a few minutes of preparation matters less.
How to use one safely
- Trim pubic hair at the base if needed, so the cylinder seals well.
- Put water-based lubricant on the rim of the cylinder and the base of the penis.
- Pump slowly. Stop if it hurts. Discomfort means too much vacuum.
- Slide the ring onto the base, then release the vacuum and remove the cylinder.
- Take the ring off within 30 minutes. Longer can damage the penis.
Common side effects are small red spots or bruising, numbness, a cold feeling, and difficulty ejaculating while the ring is on. They are usually mild and get better with practice.
What to look for when buying
We haven't hands-on tested individual brands. These are the features that matter:
- A vacuum limiter (pressure-release valve). This stops you pulling too hard. Medical VEDs have one; many cheap "enlargement" pumps sold as sex toys don't.
- Medical clearance. In the US, look for a device described as FDA-cleared for erectile dysfunction.
- Several ring sizes, since the right tension makes a big difference.
- A battery pump if you have weak hands or arthritis.
- A cylinder size that fits you, with some room but not too much.
Browse: medical vacuum erection devices on Amazon · replacement constriction rings · water-based lubricant
In some countries, and with some US insurance plans, a VED is available on prescription. Ask your doctor or urologist, as they can also show you how to use it.
Sources
- American Urological Association: Erectile Dysfunction Guideline (2018, amended 2023).
- Brison D., Seftel A., Sadeghi-Nejad H. "The resurgence of the vacuum erection device (VED) for treatment of erectile dysfunction." Journal of Sexual Medicine, 2013.
- U.S. FDA: Product classification, "Device, external penile rigidity" (21 CFR 876.5020).
- NHS: Erectile dysfunction (impotence), treatment.