Is there an operation, and does it work?

What does an artificial urinary sphincter do?

A fluid-filled cuff sits around the urethra and holds it closed. A small pump in the scrotum is squeezed to open the cuff for a few minutes when you want to pass urine; it then refills by itself. A pressure-regulating balloon behind the pubic bone sets the closing pressure.

It remains the reference operation for moderate-to-severe stress leakage across guidelines, large cohorts and international consultation documents.¹²³⁴

How effective is it?

Two numbers, and you should always ask which one you are being given.

Across pooled and multicentre data, social continence — nothing or one pad a day — is usually in the 75 to 82% range, while complete pad-free dryness is lower, commonly around 50 to 60%.³⁵⁶⁷ A systematic review of 19 studies and 1,271 men found complete dryness around 52% and social dryness around 82%, with pad use falling by roughly four pads a day.⁵

Satisfaction stays high even where perfect dryness is not achieved.⁸⁹¹⁰ That is not a consolation prize; it reflects how much of the burden is carried by the first two or three pads rather than the last one.

How long does it last?

This is the part of the conversation that gets skipped, and it should not be.

In the largest single-centre series — 1,082 implants at the Mayo Clinic — freedom from secondary surgery was about 74% at five years and 57% at ten.¹¹ A meta-analysis restricted to large male cohorts put pooled device survival at 72.0% at five years and 56.7% at ten, with pooled prevalences of infection 4.5%, erosion 6.8% and urethral atrophy 8.1%.¹²

So: a highly effective device with a real maintenance burden. Most men will not need anything doing for years; a substantial minority will need something doing eventually. I would rather you knew that before the operation. There is a fuller account of what revision actually involves in its own note.

What is a male sling?

A strip of synthetic tape placed under the urethra, which supports and repositions the sphincter mechanism. There is no pump, no fluid and nothing to operate — you simply pass urine normally.

For men with mild leakage and no major urethral risk factors, it is a reasonable alternative.¹²¹³ As severity rises, or where there has been radiotherapy or urethral surgery, the literature moves towards the sphincter. That comparison has its own note, because the trial evidence is more interesting than either side's marketing.

What has to be checked before either operation

Cystoscopy. This is emphasised repeatedly, and it is not a formality: a look inside the urethra and bladder neck before implantation is how a persistent bladder-neck contracture or an unrecognised urethral stricture is found.¹¹⁴¹⁵

The reason is sequencing. Several papers support stabilising the outlet first and implanting the sphincter once the anatomy has healed and the need for further instrumentation has passed.¹⁴¹⁵¹⁶ Putting a cuff around a urethra that is going to need repeated dilatation is asking for trouble.

There is a reassuring finding here too. In men with a bladder-neck contracture, implanting the sphincter does not appear to make the contracture worse — one cohort found it associated with a 61% lower rate of re-intervention for the contracture.¹⁷ And dilating at the same operation as implantation produced similar erosion, revision and recurrence outcomes to doing it as a separate earlier stage.¹⁸

Beyond the cystoscopy: leak severity and pad weight, previous radiotherapy, previous urethral surgery or stricture, bladder function, manual dexterity — you have to be able to work the pump — and what you actually want out of it. This is why the operation should follow a proper continence assessment rather than a conversation.

Does it matter where it is done?

More than most patients realise, and nobody tells them to ask.

Surgeons who have performed more than 200 of these operations have an absolute re-operation risk of around 11%, against 24% for those who have done five or fewer. Centres performing roughly six artificial sphincter implants a year have lower revision rates than those doing fewer than two. The BAUS consensus suggests a rough floor of 10 to 20 cases per surgeon and per centre each year.²⁵

It is entirely reasonable to ask a surgeon how many of these he does annually. A good one will not mind being asked.

What about a tablet, or an injection?

Both exist. Neither is a substitute for the two operations, and the national consensus is unusually blunt about where each one sits.²⁵

Duloxetine is an antidepressant that increases the tone of the sphincter. Reported dry rates run as high as 58%, which sounds transformative until you meet the side-effects — nausea, fatigue, insomnia, dizziness — which are why a substantial proportion of men stop taking it. It is not licensed for this use in the UK and is not routinely offered. It is a reasonable conversation for a man with mild to moderate leakage who understands that profile and does not want an operation; it is not a reason to defer one.

Bulking agents are injected into the area of the sphincter to add passive resistance. Cure rates are low and no product has shown itself better than another. The consensus position is that they should not be offered routinely — the exception being a man who cannot have any other surgical treatment and accepts an improvement rate of around 30%.

Adjustable balloons (ProACT) are not in common use in this country. The consensus is explicit that they should not be offered outside a clinical trial, and then only in a specialist centre with the governance to support it. If a device of this kind is offered to you privately, that is the sentence to have in mind.

Is anything better coming?

Possibly, and it is worth knowing what is real and what is early.

The standard device design has changed remarkably little in decades, which explains both its durability and its persistent limitations.¹⁹²⁰ Newer devices aim at adjustable pressure, remote control or electromechanical actuation, so that the urethra is not under constant compression.²¹²²

Early results are encouraging but preliminary. One adjustable device achieved 70% social continence at mid-term follow-up in 88 patients,²³ and an early multicentre series reported median 24-hour pad weight falling from 800 g to 30 g with 96.2% satisfaction.²² Another pilot reported an 87% mean reduction in pad weight — but excluded men with urethral stricture, which tells you something about where the difficulty lies.²⁴

None of this yet displaces the established device, and I would not advise waiting for it.

Bottom line

There are effective operations for post-prostatectomy incontinence, and the artificial sphincter has the longest track record and the strongest role in moderate-to-severe leakage. Slings are attractive in selected milder cases.

Expect a conversation about improvement, dryness definitions and long-term revision — not a single headline success rate.

I will quote you two numbers rather than one, because the headline always uses the looser definition. Around half of men are completely pad-free after an artificial sphincter and roughly four in five are down to nothing or one pad a day. Ask any surgeon which definition their percentage uses; the answer tells you a lot. Then ask what happens at ten years, and whether they have looked inside your urethra before booking anything.