Where Is Esperal Implanted? Implant Locations

Patients ask about this almost as often as the cost of the procedure - where exactly does the implant go? The answer is not straightforward, as the choice of location depends on several anatomical and practical factors. In Polish clinics, the buttock area is the most common site, but it is not the only option. Clinical studies show that the depth and placement of the implant directly affect the safety of the procedure and the rate of drug absorption.

In this article, we discuss the locations used in clinical practice, compare their advantages, and explain what determines the choice of Esperal implantation site.

In brief

• The most common site for Esperal implantation is the gluteal muscle area - safe, discreet, and conducive to healing
• An alternative location is the subscapular area, used less frequently, mainly at the patient's request
• The implant is placed subfascially (beneath the muscle fascia), not subcutaneously - this has a documented impact on safety
• The surgeon decides on the placement based on the patient's body type, health condition, and lifestyle

Primary location - the gluteal area

The vast majority of Esperal implant procedures in Poland are performed in the area of the gluteus maximus muscle (musculus gluteus maximus). The surgeon makes an incision approximately 3 cm long in the upper outer quadrant of the buttock - the same area where intramuscular injections are administered.

Why this particular spot? The gluteus maximus is one of the largest and thickest muscles in the human body. The thick layer of muscle tissue provides adequate depth to place 8-10 disulfiram tablets in a star-shaped pattern. The tablets are placed beneath the muscle fascia, where they are protected from mechanical injury and have stable conditions for gradual release of the active substance.

Advantages of the gluteal location

The buttock is not a random choice. The surgeon has several advantages here:

• Tissue thickness - the muscle and subcutaneous layers allow safe placement of the implant away from vascular and nerve structures
• Discretion - the implantation site remains invisible under everyday clothing
• Lower risk of irritation - the area is not subject to constant friction or pressure (unlike, for example, the arm)
• Good blood supply - promotes wound healing and even drug absorption
• Limited access - the patient cannot easily tamper with the implantation site

The scar from the procedure is 2-3 cm and gradually fades to a thin white line. Most patients forget about it within a few months.

Alternative location - the subscapular area

The second location used is the area beneath the shoulder blade (regio subscapularis). This is the region above the latissimus dorsi muscle (musculus latissimus dorsi), in the middle part of the back.

A study published in Archives of Plastic Surgery (PMID: 25276651) described a series of 32 implantations performed exclusively in the subscapular area. The authors chose this location, arguing that it is "out of the patient's sight and reach" - which was intended to minimize the risk of implant tampering. In practice, however, it turned out that the critical factor was not so much the location as the depth of tablet placement.

When is the subscapular location used?

The subscapular area comes into play in several situations:

• The patient has scars or skin lesions in the buttock area that would complicate the procedure
• The nature of their work requires prolonged sitting immediately after the procedure (professional drivers, machine operators)
• The patient has strong preferences regarding the scar location
• Re-implantation - when a scar from a previous procedure remains in the buttock area, the surgeon may choose a new site

Ultimately, the doctor decides after assessing the patient's anatomy.

Subfascial vs. subcutaneous - why depth matters

This is a question patients rarely ask, but doctors take seriously. Disulfiram tablets can be placed at two levels: subcutaneously (just under the skin, above the muscle) or subfascially (beneath the muscle fascia, within the muscle).

The aforementioned study from Archives of Plastic Surgery compared both approaches in a group of 32 patients. The results were clear:

| Placement method | Number of procedures | Implant exposure | Complication rate | |------------------|---------------------|------------------|-------------------| | Subfascial (intramuscular) | 25 | 0 cases | 0% | | Subcutaneous | 7 | 3 cases | 42.9% |

Implant exposure means that the tablets "came through" the skin - requiring surgical intervention. With subfascial placement, not a single such case was recorded.

Furthermore, in patients with subcutaneous implants, a case of incomplete tablet absorption after one year was noted. With intramuscular placement, all tablets were fully absorbed - the drug was released entirely as intended.

According to the Summary of Product Characteristics (SmPC) for Disulfiram WZF, the tablets are implanted subfascially, with 8 to 10 tablets arranged in a star-shaped pattern. The subcutaneous method, while technically simpler, carries a significantly higher risk of complications.

Sites where Esperal is not implanted

Patients sometimes ask about implantation in the arm, abdomen, or thigh. In practice, these locations are used sporadically or not at all.

Arm - thin muscle layer, high risk of exposure, visible scar. Some foreign clinics use this location, but it is not standard practice in Poland.

Abdomen (lower abdomen) - older medical literature described implantations in the abdominal area. Risks include proximity to internal organs, thin fascia, and discomfort when bending. This location has been largely abandoned in favour of safer sites.

Thigh - theoretically sufficient muscle mass, but in practice the area is subject to constant movement and friction, which impairs healing and increases the risk of tablet displacement.

What influences the choice of implantation site?

The surgeon makes the decision about the location during the qualifying consultation. What do they consider?

1. Body type - in individuals with low body mass, the muscle layer in the gluteal area may be thinner, requiring more careful assessment of implantation depth
2. Scars and skin conditions - existing scars at the planned site may impair healing or affect drug absorption
3. Lifestyle and occupation - professional drivers, manual workers, or athletes may require the location to be adapted to their daily activities
4. Procedure history - for subsequent implantations (re-implantation is possible after 8 months), the doctor may choose a new site to avoid implanting into scar tissue
5. Patient preferences - although the doctor makes the final decision, reasonable patient preferences are taken into account

The drug dosage and implantation site are determined by the doctor based on the consultation.

Healing and post-procedure care

Regardless of the chosen location, the wound after the Esperal implant procedure heals within 7-14 days. The procedure itself takes 20-30 minutes and is performed under local anaesthesia.

In the first few days after the procedure, the patient should:

• Keep the dressing clean and change it daily
• Avoid soaking the wound (shower instead of bath)
• Limit intense physical activity for 2-3 weeks
• Monitor the wound for redness, swelling, or discharge

Swelling and slight redness in the first few days are normal. Stitches are removed after 7-10 days. More about post-procedure care and restrictions is discussed during the consultation.

With the gluteal location, sitting may be uncomfortable for the first 2-3 days - it is worth keeping this in mind when scheduling the procedure. With the subscapular location, discomfort mainly affects arm movements and lying on the back.

Frequently asked questions

Where on the body is Esperal most commonly implanted?

The most common location is the area of the gluteus maximus muscle - the upper outer quadrant of the buttock. This is an area with a thick muscle layer, good blood supply, and low risk of irritation. The implant is placed subfascially (beneath the muscle fascia), providing stable conditions for drug release over 8-12 months.

Can the patient choose the implantation site?

The final decision about the location is made by the surgeon based on the patient's body type, health condition, and any existing scars. Reasonable patient preferences are taken into account - for example, if the nature of their work requires prolonged sitting, the doctor may consider the subscapular location. Choosing a site without a medical consultation is not possible.

Does implantation in the buttock hurt?

The procedure is performed under local anaesthesia, so the moment of implantation itself is painless. After the anaesthesia wears off, the patient may experience discomfort - comparable to the pain after an intramuscular injection. Sitting may be uncomfortable for 2-3 days. The pain subsides on its own and does not require strong painkillers.

Is the scar from the implant visible?

The surgical incision is approximately 3 cm long. A fresh scar is pink and slightly raised. Within a few months, it fades to a thin white line. When placed in the buttock area, the scar is invisible under everyday clothing - even in swimwear, it is difficult to notice without deliberately looking for it.

Why is Esperal not implanted in the arm?

The arm has a thin muscle layer compared to the buttock, which increases the risk of implant exposure - a situation where the tablets "come through" the skin. Clinical studies (PMID: 25276651) showed that with subcutaneous placement, the exposure rate reached 42.9%, while with deep subfascial placement it was 0%. The arm does not provide sufficient tissue depth for safe implantation.