04 Sep 2026 Downsizing the Repair in Complex Incisional Hernias

One of the most powerful tools available to a surgeon repairing complex abdominal wall hernias — particularly incisional hernias — is component separation techniques. Applying these techniques increases the chance of achieving primary closure of the fascial defect, which is the primary goal of repair, and reduces the risk of recurrence. However, the power of these techniques comes with a cost: wider dissection, longer operative time, an increased risk of wound complications, and, in some patients, loss of abdominal wall function. For this reason, the priority of an experienced abdominal wall surgeon is, whenever possible, to achieve successful outcomes using simpler techniques with lower surgical complication risk, without ever needing these extensive techniques at all.

This is what we call ‘de-escalation’ — stepping the scope and severity of the repair down a level. There are several complementary methods that can be applied before and during surgery to achieve this: weight loss for the patient, Botulinum Toxin A (Botox) injection, preoperative progressive pneumoperitoneum (PPP), and intraoperative fascial traction (Fasciotens). In this post, I’ll explain these and similar methods, the relationship between them, and why the principle of ‘simple repair first’ matters so much.

Why Think Before Component Separation?

In large incisional hernias, the abdominal wall muscles are gradually pulled laterally over time, the defect widens, and in some cases the intra-abdominal organs lose so much domain outside the defect (loss of domain) that it becomes difficult even to return them to the abdominal cavity. In this scenario, surgeons often turn directly to component separation. Yet the actual principle is to first attempt simpler, lower-morbidity options, and reserve extensive techniques carrying complication risk only for genuinely necessary, well-selected cases. 

Weight Loss for the Patient: Perhaps the Most Fundamental Step

Obesity is a leading factor both in the development of incisional hernias and in the difficulty of their repair. Excess weight increases intra-abdominal pressure, enlarges the defect, and negatively affects wound healing. As you know, obesity is graded by body mass index (BMI). Preoperative weight loss is very important for patients with complex hernias. Every 1-point reduction in BMI significantly lowers the risk of postoperative complications and recurrence. In the past, we used to refer very overweight patients for bariatric surgery before repair and postpone the hernia repair. More recently, weight loss achieved through GLP-1 agonists (such as Ozempic and Mounjaro) has become a genuine ‘game changer’ in preoperative preparation; in suitable patients, preoperative weight loss can shrink the defect and make a simpler repair possible. I discussed the impact of these medications on hernia surgery in my blog post ‘Ozempic: A Game Changer in Hernia Surgery.’ You can also read my blog post on ‘Hernia Surgery in Obese.’

Botox: Relaxing the Muscles Before Surgery

The use of Botox in hernia surgery has been gaining ground in recent years. Botox injected into the lateral abdominal wall muscles (particularly the transversus abdominis and the internal and external oblique muscles) a few weeks before surgery temporarily relaxes these muscles, allowing the abdominal wall to stretch on its own. Botox also provides a modest additional benefit in expanding intra-abdominal cavity volume, complementing its effect on defect closure. As a result, the defect shrinks, the abdominal wall can be brought toward the midline more easily, and in some cases the need for component separation disappears entirely. In earlier blog posts, I described Botox as a standard application for EHS class W3 hernias — that is, incisional hernias wider than 10 cm. However, this approach has now expanded: today, Botox can also be applied to defects 5 cm and wider. This is also the current practice of the ‘Madrid 6’ hernia group, one of the world’s most experienced centers in this field. In addition, primary closure of 5–10 cm defects is also a serious challenge in laparoscopic primary or incisional ventral hernias. In this patient group as well, Botox reduces tension at the defect and facilitates primary closure.

PPP: Preparation for Patients with Loss of Domain

In giant hernias where intra-abdominal organs have been outside the defect for a long time, the volume of the abdominal cavity may have shrunk; in such cases, returning the organs all at once can cause respiratory distress and a rise in intra-abdominal pressure. Preoperative progressive pneumoperitoneum (PPP) works by gradually injecting air into the abdominal cavity to expand it over several days. This makes repositioning the organs safer and also better prepares the tissues for surgery. I explained which patients I use PPP in and how I apply it in my blog post ‘PPP in Giant Hernias’

Fasciotens®: Controlled Intraoperative Tension on the Fascia

We also have a tool for ‘de-escalation’ during surgery itself: Fasciotens®. After retrorectus dissection is completed and the posterior fascia–peritoneum–hernia sac complex is closed, this device applies a controlled, measurable tension (up to approximately 20 kilograms, over thirty minutes) at a specific angle to the anterior fascia of the rectus muscle on both sides, allowing the fascia to relax and the muscles to expand toward the midline. This medializes the rectus muscles, and in many cases the defect can be closed without any need for component separation at all. According to recently published subgroup analyses, the primary fascial closure rate with Fasciotens reaches 95.6% for defects between 10–14 cm, drops to 78.7% for defects between 15–19 cm, and falls to 32.4% for defects over 19 cm.

Is Rives-Stoppa Enough? Or Should TAR Be Performed?

The debate on this continues. In TAR, a wider mesh is placed, distributing intra-abdominal pressure over a larger surface and thereby lowering the risk of recurrence. However, this is a more extensive technique that is more prone to complications, and it requires advanced experience. Rives-Stoppa, on the other hand, involves only the retrorectus space. It is a relatively much easier technique to perform. It is a limited form of component separation and helps bring the rectus muscles toward the midline. John Rives and Rene Stoppa, legendary French abdominal wall surgeons, applied this technique at almost the same time — back in 1966 — and to this day, its success has been confirmed by many centers. What matters is being able to close the anterior rectus fascia. If you can do that, Rives-Stoppa is an excellent technique.

All Together: A Combined Approach

The power of these four methods actually emerges not individually, but when used together. In cases where Botox, PPP, and Fasciotens are planned together, and the patient has also lost weight before surgery, the severity of the hernia can be progressively reduced, allowing a step-down to a simpler, lower-complication level of repair. This not only makes the operation easier — it also reduces risks such as wound complications, recurrence, and prolonged hospital stay.

Component separation techniques remain an important tool in complex incisional hernias, but they should not always be the first choice. In particular, the posterior component separation technique known as TAR is being applied excessively. ‘De-escalating’ the repair through methods such as Botox, PPP, Fasciotens, and preoperative weight loss — that is, stepping back to a simpler, less invasive repair — is often the wiser strategy, both for patient safety and for long-term outcomes.