Device-Assisted Treatments for Erectile Dysfunction: Vacuum Devices and Penile Traction
There is a space between medication and surgery: device-assisted approaches. How a vacuum erection device works, when penile traction comes into play and what the realistic limits of these methods are, are covered here.
The treatment of erectile dysfunction is usually described in terms of two extremes: oral medication on one side, penile prosthesis surgery on the other. Yet between the two lies a space that is neither medication nor surgery. Device-assisted approaches occupy that space, and in the right patient they can be a functional part of the treatment plan.
This article covers the two groups of devices most often used in andrology: vacuum erection devices, which aim to produce an erection mechanically, and penile traction devices, which aim to influence tissue through regular stretching. Both are considered for specific indications, and neither is suitable for every patient.
What does device-assisted treatment mean?
Device-assisted treatment is the general term for approaches that aim to achieve a result through a mechanical effect, either without medication or alongside it. Their shared features are as follows:
- No surgery is involved: Nothing is placed inside the body and the approach is reversible.
- The effect depends on use: When the device is not used, the effect does not persist, which makes regularity decisive.
- They are assessed within a plan, not on their own: In most patients they are considered together with medication, exercise or a surgical plan.
These approaches share a weak point as well: they are demanding to use, and a proportion of patients abandon them within the first few weeks. For that reason, the patient's expectations and daily routine should be discussed before a device is recommended.
How does a vacuum erection device work?
A vacuum erection device consists of a transparent cylinder into which the penis is placed, a pump that draws out the air, and a constriction ring fitted at the base of the penis. The principle is straightforward:
- Air is removed from the cylinder, creating negative pressure.
- The negative pressure increases blood flow into the penis and produces a fullness resembling an erection.
- To maintain that fullness, an elastic ring is placed at the base of the penis and the cylinder is removed.
The erection produced this way differs from a natural erection in certain respects. Because the area below the ring retains its own natural flaccidity, the penis may be more mobile at the base, and tissue temperature may drop slightly. These differences do not impair function in most patients, but they cause disappointment when they are not known in advance.
There is an important safety limit: the constriction ring should not be left in place for longer than 30 minutes. Prolonged restriction of blood flow poses a risk to the tissue.
Which patients are considered for a vacuum device?
In erectile dysfunction, a vacuum device may come into consideration in the following situations:
- Patients who do not obtain an adequate response from oral medication
- Patients who cannot take erection medication because they use nitrate-group drugs for heart disease
- Patients who cannot tolerate side effects or who prefer not to take medication
- Patients who are not considering surgery at present and are looking for a non-surgical option
- As part of a rehabilitation programme after prostate cancer surgery
Conversely, in some situations a vacuum device is unsuitable or requires careful assessment: bleeding disorders, use of blood-thinning medication, conditions predisposing to priapism such as sickle cell disease, and the presence of active infection or a wound on the penile skin are the main examples.
What are penile traction (stretching) devices used for?
Penile traction devices apply a regular, controlled stretching force to the penis. Their rationale is not to produce an erection but to make use of the tissue's adaptive response to sustained stretching. In andrology they are considered mainly in three contexts:
- Peyronie's disease: Particularly during the active phase, they are considered a supportive option in managing curvature and loss of length.
- Before and after Peyronie's surgery: They may form part of preparation in patients scheduled for surgery, and part of the recovery programme afterwards.
- After penile prosthesis surgery: In selected cases they are considered in managing the perception of length loss.
The most misunderstood aspect of traction is duration. These devices do not produce a result when used for a few minutes a day; they generally require use for several hours a day over many months. Where the programme is not followed, no expected effect can be described. Traction is therefore recommended when there is confidence that the patient can genuinely sustain it.
What is penile rehabilitation, and where does the device fit in?
Penile rehabilitation is the general term for programmes that aim to keep erectile tissue regularly filled with blood, particularly after surgery in which nerve structures may be affected, such as radical prostatectomy. The aim is to limit the loss of elasticity, and the associated loss of length, that can develop in tissue left without erections for a long period.
These programmes may combine or sequence medication, injection therapy and a vacuum device. The role of the vacuum device in this context is to fill the tissue mechanically during the period in which nerve stimulation is not yet sufficient for an erection.
The scope and duration of rehabilitation programmes vary from patient to patient; the type of surgery, whether the nerves were preserved and erectile status before surgery all directly influence the plan.
Do devices replace medication or surgery?
No. Treatment of erectile dysfunction is structured in steps, and devices do not replace those steps; they sit between them.
- Medication is the first step in most patients and is functional where the vascular structure is largely preserved.
- Device-assisted approaches offer a non-surgical intermediate step for patients who do not respond to, or cannot take, medication.
- Penile prosthesis surgery comes into consideration in patients with advanced vascular damage who do not respond to other methods.
What determines which step a patient is on is not preference but the underlying cause. A device recommendation therefore only makes sense once the cause of the erectile dysfunction has been assessed. This is precisely why some of the devices sold online are problematic: they are marketed without any medical assessment, and often with claims of increased length or girth.
What should be borne in mind during use?
Most problems with device-assisted treatments arise not from the method but from incorrect use. The points to observe are as follows:
- Respect the time limit: The constriction ring should not exceed 30 minutes, and with traction the recommended daily duration should not be exceeded.
- Pain is a warning: If pain, numbness or marked colour change occurs during use, the session should be stopped.
- Increase pressure gradually: Sudden, high pressure in a vacuum device can cause subcutaneous bleeding and pinpoint bruising.
- Correct sizing: A ring that is too tight is a risk to the tissue, while one that is too loose is ineffective.
- Hygiene: The cylinder and ring should be cleaned after every use.
When should a doctor be consulted?
In the following situations, an assessment is needed rather than trying a device independently:
- An erection problem lasting longer than a few months
- A problem that is progressing, or erections disappearing altogether
- Noticing curvature, hardness or a palpable thickening in the penis
- The presence of a risk factor such as diabetes, hypertension or heart disease
- Having undergone prostate surgery
- Experiencing pain, bruising or loss of sensation with a device in use
Device-assisted approaches stand between medication and surgery in erectile dysfunction and can be functional in the right patient. Their effects depend on regular use, their limits are defined and, most importantly, they do not remove the underlying cause. Assessing the cause of an erection problem before trying a device therefore prevents both unnecessary attempts and the oversight of an underlying health condition. Assoc. Prof. Zülfü Sertkaya practises in urology and andrology in Istanbul; assessment and treatment planning in erectile dysfunction are carried out with individual assessment and confidentiality.