A penile prosthesis is a well-established surgical option for men with erectile dysfunction (ED) when other treatments have not provided reliable erections. The aim is to restore sexual function by placing an internal device that can create sufficient firmness for intercourse. The implant sits entirely inside the body and is not visible externally.

What a penile prosthesis is designed to do

A penile prosthesis (penis implant) is a medical device placed within the erection chambers of the penis to allow an erection firm enough for sex. It does not treat the underlying cause of ED, but it can provide a dependable erection when tablets, vacuum devices, or injection therapy are ineffective or unsuitable.

It is important to know what the implant does and does not change:

• It is intended to restore rigidity.
• It does not directly increase sexual desire.
• It usually does not change the ability to feel touch or reach orgasm, because sensation and climax are mainly related to nerves and blood flow outside the implant.
• Fertility is not improved by an implant. If ejaculation is already affected due to prostate surgery or other conditions, an implant does not reverse that.

When this surgery may be a good option

A penile prosthesis is generally considered for men with persistent, medically confirmed ED, particularly when less invasive options have not worked or are not tolerated.

It may be suitable if ED is related to:

• Diabetes or vascular disease
• Nerve injury, including after prostate surgery
• Peyronie’s disease with significant curvature and loss of rigidity
• Other organic (physical) causes of ED

It may also be considered when:

• Oral medications (such as PDE5 inhibitors) do not provide reliable erections
• Injection therapy or vacuum devices are ineffective, uncomfortable, or not acceptable long term

Realistic limitations to understand:

• The penis will not become “spontaneously” erect without using the implant mechanism (for inflatable devices) or positioning it (for malleable devices).
• Penile size expectations need careful discussion. Some men perceive shortening after years of ED or Peyronie’s disease. Implant sizing aims to achieve the best safe fit, but outcomes vary.
• As with any implanted device, revision surgery may be needed in the future.

Types of implants and how they differ

The two main categories are inflatable implants and malleable (semi-rigid) implants. Choosing the right option depends on anatomy, medical history, lifestyle, and personal preference.

Inflatable (three-piece) implant

This is the most commonly selected option for men who want a more natural-feeling flaccid state and controlled firmness.

A three-piece inflatable system includes:

• Two cylinders placed inside the penis
• A pump placed in the scrotum
• A fluid reservoir placed in the lower abdomen

When the pump is activated, fluid moves into the cylinders to create an erection. A release valve allows the device to deflate.

Some inflatable cylinders are designed to expand mainly in width, while others expand in both length and width. The most appropriate cylinder style is chosen based on individual anatomy and goals, and on what is safe and achievable.

Malleable (semi-rigid) implant

A malleable implant consists of bendable rods placed inside the penis. The penis remains firm but can be positioned up or down manually.

Potential advantages:

• Simple to use
• No pump or reservoir
• Lower risk of mechanical malfunction

Potential disadvantages:

• The penis stays semi-rigid at all times, which can be more noticeable under clothing

Pre-surgery assessment and planning

Penile prosthesis surgery requires careful preparation to maximise safety and satisfaction.

At consultation, assessment typically includes:

• A detailed medical and sexual history, including previous ED treatments and response
• Review of contributing conditions (for example diabetes control, cardiovascular health, smoking)
• Physical examination to assess penile anatomy, scarring, or curvature
• Additional tests when needed, such as blood tests and pre-anaesthetic assessment

Planning also focuses on:

• Selecting the implant type that best matches goals and anatomy
• Identifying any factors that increase infection risk
• Reviewing current medications, especially blood thinners and diabetes medicines, which may need adjustment

A clear discussion about expectations is essential, including how the implant feels, how it is used, and what recovery involves.

How the procedure is generally performed

Surgery is carried out in an operating theatre under sterile conditions, usually with general or spinal anaesthesia. The operation time varies by complexity and implant type.

The implant is placed through a small incision. Common incision locations include:

• Just below the pubic area (infrapubic)
• Where the penis meets the scrotum (penoscrotal)
• Near the head of the penis (subcoronal), sometimes combined with circumcision when appropriate

The erection chambers are prepared, then cylinders are inserted and sized. For inflatable implants, the pump and reservoir are positioned internally. The system is tested, the incision is closed, and a dressing is applied.

The specific approach is chosen based on anatomy, previous surgeries, Peyronie’s disease considerations, and the implant selected.

Recovery, aftercare, and getting used to the implant

Most men experience some swelling, bruising, and discomfort during the early recovery period. Pain relief and antibiotics are commonly prescribed.

Typical recovery milestones include:

• Early recovery: rest, wound care, and gradual return to light activities as advised
• Follow-up visits: checks for healing, swelling, and any signs of infection
• Device familiarisation: instruction on how to use the implant (particularly important for inflatable devices)

Sexual activity is usually avoided for several weeks. Many men can return to intercourse around 4 to 6 weeks after surgery, depending on healing and comfort. For inflatable implants, first activation and training may be guided in clinic to ensure confidence and correct technique.

Risks, limitations, and important considerations

Penile prosthesis surgery has high satisfaction rates in appropriately selected patients, but it is still a surgical procedure with potential complications.

Key risks include:

• Infection (a serious complication that may require implant removal)
• Bleeding or haematoma
• Pain that persists longer than expected
• Implant malfunction over time (more relevant to inflatable devices)
• Device erosion or tissue injury (uncommon, but important)
• Changes in sensation or numbness (rare)

Important considerations:

• Infection prevention is a major focus. Good diabetes control and careful surgical technique reduce risk.
• If infection occurs, further surgery may be needed.
• Implants are designed to be durable, but no device lasts forever. Revision surgery can be required years later due to wear, mechanical failure, or changes in anatomy.
• The implant creates firmness, but it does not treat relationship factors, anxiety, or low libido. If psychological or relationship issues contribute, combined support can improve overall outcomes.

Your consultation journey and ongoing support

Choosing an implant is a significant decision. Our urology team supports patients through a structured process that prioritises privacy, clear information, and continuity of care.

This typically includes:

• A thorough consultation to confirm the cause of ED and review previous treatments
• A personalised discussion of implant options and what each would mean day to day
• Pre-operative planning to reduce risk and optimise results
• Post-operative follow-up and practical training so you can use the device confidently

If questions arise at any stage, our medical team remains available to guide recovery, address concerns promptly, and support long-term outcomes.