Penile prosthetics: indications and types

Penile prosthesis is a surgical treatment for erectile dysfunction in patients for whom medications, vacuum devices, or intracavernous injections have proven ineffective, contraindicated, or unacceptable. The implant is placed within the corpora cavernosa and ensures the achievement and maintenance of an erection for sexual intercourse. The procedure does not affect libido or orgasm; its purpose is to restore the mechanical ability to perform intercourse and improve quality of life. [1]

There are two main classes of implants: semi-rigid rods and inflatable systems. Semi-rigid rods are simpler in design and less expensive, are less susceptible to mechanical failure, and maintain their shape, which impacts comfort and concealment. Inflatable three-component systems are closer to physiology and offer higher satisfaction rates in well-selected patients, but require pump manipulation and are more complex to install. [2]

Current guidelines emphasize the importance of informing the patient and, if possible, the partner about the types of implants, realistic expectations regarding length and circumference, the likelihood of adjustments, and the risks of revision surgeries in the long term. Honest discussion increases satisfaction and reduces the risk of disappointment. [3]

When properly selected, prosthetics demonstrate some of the highest satisfaction rates among erectile dysfunction treatments for both patients and partners, and the durability of the devices is confirmed by long-term observational data. [4]

Table 1. Objectives of the operation

Target	Practical meaning	How the results are assessed
Restore coital function	The ability to perform sexual intercourse on demand	Satisfaction questionnaires, frequency of intercourse
Improve the quality of life	Reduced anxiety, increased confidence	Quality of life and daytime sleepiness indicators
Minimize complications	Prevention of infection and breakdowns	Frequency of revisions and rehospitalizations
Ensure durability	Long-lasting performance of the device	Device survival according to meta-analyses
A collection of modern reviews and guidelines. [5]

When prosthetics are indicated and when they are not

Indication #1: Persistent erectile dysfunction with insufficient response to or intolerance to conservative treatments, with an informed choice of surgery as the final solution. It is important to exclude active skin and urinary tract infections, as the presence of infection is a contraindication to primary implantation. [6]

A separate group of indications is early implantation after ischemic priapism lasting over 36 hours to prevent fibrosis of the corpora cavernosa and shortening of the penis. In this situation, implantation can be considered as a method for restoring function and length. [7]

Contraindications include uncontrolled diabetes mellitus, active skin or urogenital infections, severe coagulation disorders, and inability to adhere to postoperative care guidelines. The decision on the timing of the intervention is made after stabilization and correction of risk factors. [8]

European and US guidelines recommend documenting shared decision-making, including discussion of the implant type, the potential need for future revision, and comparison of surgical and non-surgical alternatives. This protects the patient from unrealistic expectations. [9]

Table 2. Indications and contraindications

Block	Examples	Comments
Indications	Refractory erectile dysfunction, early implantation after prolonged priapism	Individual assessment and informed consent
Absolute contraindications	Systemic infection, active skin or urinary tract infection	First sanitation, then surgery
Relative contraindications	Uncontrolled diabetes, severe immunosuppression	Correction of risk factors, interdisciplinary plan
Important caveats	Inflated expectations of length and circumference	Mandatory preoperative conversation
Summary of AUA and EAU. [10]

Types of prostheses and how to choose

Semi-rigid rods are convenient for those with limited hand dexterity, when the primary goal is simply to achieve rigidity, and when resource constraints exist. Their mechanical reliability is high, but constant rigidity can cause discomfort in everyday life and is less easily concealed by clothing. [11]

Inflatable three-component systems include cylinders, a reservoir, and a pump in the scrotum. They mimic natural erections and floppiness and provide better subjective assessments in properly selected patients, but require training. According to a meta-analysis, device survival rates are approximately 87% at 5 years and 77% at 10 years, confirming the durability of the solution. [12]

Comparative studies of brands show comparable satisfaction and similar mechanical survival rates with adequate technique and proper sizing. The choice between models is often determined by anatomical features and surgeon preferences, rather than a proven "better-worse" distinction. [13]

Some publications discuss differences in load-bearing capacity and the nuances of cylinder configurations, but these differences are more important for individual selection than for a general conclusion about superiority. The solution is always personalized. [14]

Table 3. Comparison of implant classes

Parameter	Semi-rigid rods	Three-component inflatables
Satisfaction	Moderate	High in selected patients
Control	Permanent form	Scrotal pump, on demand
Mechanical failures	Less often due to simplicity	There may be damage to the pump, tank, and tubes.
Camouflage and comfort	Worse	Best floppiness outside of coitus
Cost and availability	Below	Higher, depends on the system
Summarized from reviews and clinical series. [15]

Preoperative assessment and preparation

The goal of the preoperative phase is to confirm the diagnosis, document the ineffectiveness of conservative treatments, and assess the anatomy and associated risk factors. A screening for urinary tract and skin infections, correction of glycemia in diabetes mellitus, and a discussion of length and circumference expectations with a demonstration of the pump operation are mandatory. [16]

The patient is explained that the surgery does not increase the length compared to the initial state during disease remission. Satisfaction is higher with pre-agreed realistic goals, and measuring the length before and after implantation does not change the subjective assessment with proper counseling. [17]

The choice of approach and device configuration is determined by the patient's anatomy, previous pelvic procedures, the presence of scars, and the surgeon's preference. Concomitant correction of penile deformity is also considered if clinically significant. [18]

Infection prevention includes debridement of lesions, antiseptic skin preparation, intravenous antibiotic prophylaxis according to local protocols, and the use of coated implants in risk groups. This reduces the incidence of early complications. [19]

Table 4. Preparation checklist

Paragraph	For what	Example of action
Rule out infection	Reduce the risk of implant infection	Urinalysis, skin debridement
Diabetes control	Reduce the risk of wound complications	Correction of therapy to target values
Expectations Counseling	Prevent disappointment	Discussion of length, circumference, pump training
Antibiotic plan	Reduce the incidence of early infections	Intravenous prophylaxis according to protocol
AUA Summary and Reviews. [20]

How is the operation performed and what determines quality?

Implantation is performed through a penoscrotal or infrapubic approach under general or spinal anesthesia. Cylinders are inserted into the corpora cavernosa, the pump is positioned in the scrotum, and the reservoir is placed in the premural or retroperitoneal pouch, depending on the anatomy and previous surgeries. Careful dilation and precise sizing are essential. [21]

Key elements of quality include "non-contact" technique, minimizing device contact with the skin, careful hemostasis, and sparing use of instruments to reduce bacterial contamination and hematomas. These approaches are associated with the lowest risk of early infection. [22]

When erectile dysfunction is combined with penile deformity, adjuvant correction techniques are possible, but their appropriateness is determined on an individual basis after discussing the risks of sensitivity and length. Recording these agreements in a protocol is important. [23]

After placement, the device is partially activated to check for symmetry and kinks in the tubing, then deactivated. Layered wound closure and a standard dressing are applied, and the patient is transferred to a ward or intensive care unit as indicated. [24]

Table 5. Intraoperative measures to reduce the risk of complications

Measure	For what	Evidence support
"Contactless" technology	Less device contamination	Reduction of infections to ≈0.5% in a series of experimental centers
Coated implants	Surface antibiotics against biofilms	Reducing the incidence of early infections
Careful hemostasis	Less hematoma and secondary infection	Reduction of revisions
Checking the configuration	Prevention of kinks and dysfunction	Fewer early failures
Summarized from surgical reviews. [25]

Efficiency, satisfaction and durability

Systematic reviews demonstrate high satisfaction rates after prosthetic fitting: in some studies, patients and partners report 90-95% positive ratings with proper counseling and training. This is one of the most consistent metrics of the method's success. [26]

The durability of inflatable systems has been confirmed by meta-analysis: device survival rates are approximately 93% at 1 year, 87% at 5 years, and 77% at 10 years, with a further decline after 15-20 years, which is important to explain to patients in advance. Semi-rigid systems are less likely to fail, but have lower satisfaction rates. [27]

Differences between brands in satisfaction and mechanical survival are not significant with proper technique and sizing. The surgeon's experience and adherence to protocol play a key role. [28]

In patients after ischemic priapism and after radical prostatectomy, prosthetics also show high satisfaction with correct management and timing, which expands the circle of beneficiaries of the method. [29]

Table 6. Expected results

Metrics	Typical range
Patient satisfaction	85-95%
Partner satisfaction	90-95%
Survivability of inflatable systems	≈87% for 5 years, ≈77% for 10 years
The share of revisions in the first 5 years	Low with proper technique
Summarized from reviews and meta-analyses. [30]

Risks and complications to be aware of

Implant infection is a rare but severe complication, requiring device removal and staged reimplantation strategies or immediate salvage when indicated. The risk is less than 3% for primary implantation and higher for revisions and in high-risk patients. [31]

Mechanical failures include pump failure, reservoir leakage, and kinked tubing; these problems are resolved by inspection and component replacement. Modern devices demonstrate high mechanical survivability, but the risk increases after 10-15 years of operation. [32]

Specific complications include cylinder erosion, urethral perforation, reservoir migration, and early pain and swelling. Their incidence is low, but immediate medical attention is required if pain, fever, wound discharge, or pump malfunction occur. [33]

Risk factors for infection include diabetes, smoking, spinal cord injury, immunosuppression, and prolonged and repeated surgeries. Risk reduction strategies are described in current review papers and clinical guidelines. [34]

Table 7. Frequent complications and tactics

Complication	Signs	First steps
Infection	Pain, fever, discharge, hyperemia	Urgent evaluation, device removal and debridement, discussion of salvage approach
Mechanical failure	The pump does not work, filling asymmetry	Visit to the surgeon, revision and replacement of components
Cylinder erosion	Pain, ulceration, discharge	Tissue removal and restoration
Kinked tubes	Uneven erection	Configuration correction, revision according to indications
Summarized from reviews and clinical series. [35]

How to Reduce the Risk of Infection: A Practical Protocol

The combination of coated implants, "no-touch" technology, and a standardized prevention checklist allows infection rates to be reduced to fractions of a percent in experienced hands. The key is to minimize device contact with the skin and reduce surgical time. [36]

Intravenous antibiotic prophylaxis is prescribed according to local protocols, taking into account the sensitivity of the flora. Data indicate that extended courses of oral antibiotics before and after surgery do not provide clear additional benefit compared to properly selected intravenous prophylaxis. [37]

Glycemic control, smoking cessation, treatment of staph infections, and thorough skin antisepsis are essential elements of preparation, especially in high-risk patients. These steps reduce the likelihood of wound problems and implant colonization. [38]

In case of implant infection, immediate debridement with temporary rods or immediate rescue techniques using local antibiotic depots as indicated are discussed. The choice of strategy depends on the severity, timing, and local expertise. [39]

Table 8. Preventive “bundle” for surgeon and patient

Element	What does it do?	Level of influence
Covered implant	Counteracting biofilms	High
"Contactless" technology	Prevents contact with skin	High
Correction of risk factors	Lowering glucose, quitting smoking	Medium and high
Rational antibiotic prophylaxis	Closes early risk windows	Average
Summarized from AUA reviews and reports.[40]

Private clinical situations

In patients with diabetes, maximum attention should be paid to glycemic control before surgery and in the early postoperative period. The risk of infection in this group is higher, but modern protocols can significantly reduce it. [41]

Following prostate cancer surgery, prosthetic replacement is effective in restoring sexual function in persistent erectile dysfunction, with data indicating high satisfaction rates comparable to the general patient population.[42]

After ischemic priapism, early implantation can prevent severe fibrosis and shortening, improving functional outcome and patient satisfaction over the next several years. Specific timing is determined interdisciplinary. [43]

In cases of combined penile deformity, an individualized correction strategy is selected in conjunction with implantation, taking into account the balance between straightening, sensitivity, and length. A detailed preoperative agreement on goals is required. [44]

Recovery and daily life with an implant

Inpatient care includes pain management, thrombosis and infection prevention, and pump training. The first partial "training" inflation is usually performed after 2-4 weeks, and sexual intercourse is permitted after approximately 4-6 weeks, provided there are no complications. The surgeon determines the individual timing. [45]

During the first few weeks, it's important to wear supportive garments, maintain good hygiene, and follow the gradual training instructions for the device. This improves comfort and reduces the risk of kinking. [46]

The follow-up visit plan includes a wound examination, checking pump operation and cylinder symmetry, and a discussion of sensations and user experience. If pain, fever, or device malfunction occurs, an unscheduled visit is necessary. [47]

Over the long term, patients report sustained improvements in quality of life and sexual confidence, especially with initially realistic expectations and active training in using the implant. [48]

Key findings for the patient

1. Prosthetics are a reliable and durable method for refractory erectile dysfunction, with satisfaction rates of approximately 90% and survival rates of inflatable systems of approximately 87% at 5 years and 77% at 10 years. [49]
2. The risk of infection is minimized by a combination of coated implants, "no-touch" techniques, and judicious antibiotic prophylaxis. In experienced centers, infection is extremely rare. [50]
3. The differences between device brands are secondary to the surgeon's selection, technique, and experience. Personalized choice is more important than brand disputes. [51]