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The management of abdominal wall defects is challenging and complex. To achieve good outcomes, the goals and objectives of abdominal wall reconstruction must be defined. This activity reviews preoperative optimization, techniques for repair, mesh use, and complications of abdominal wall reconstruction and highlights the role of the interprofessional team in caring for patients who have undergone or who are considering undergoing abdominal wall reconstruction. Objectives: Identify indications for abdominal wall reconstruction. Describe potential complications of abdominal wall reconstruction. Describe the teamwork necessary for successful abdominal wall reconstruction. Explain why careful planning and discussion with other professionals involved in the management of the patient undergoing abdominal wall repair will lower the associated morbidity and improve patient outcomes. Access free multiple choice questions on this topic.

Abdominal wall reconstruction has become a frequently used term to describe hernia repairs that try to recreate the abdominal wall and restore function and structure. Although there has been no universally agreed-upon definition of a functional abdominal wall, many surgeons believe this involves the closure of the fascia at the midline, often with reinforcement using mesh prosthetics.[1] The integrity of the abdominal wall is vital as it serves to protect the internal organs, supports the spine and helps maintain an upright posture. Also, the abdominal wall aids in the performance of several bodily functions requiring the generation of Valsalva such as urination, coughing, and defecation. There are also data suggesting an absence of an intact abdominal wall can lead to a sensation of insatiety, possibly contributing to weight gain. Hernia Risks Incisional hernia following exploratory laparotomy occurs in 5% to 20% of patients. Risk factors for incisional hernia formation include (1) immunosuppression, (2) wound infection, (3) extreme obesity, (4) malnutrition, (5) patient age, (6) prior abdominal surgery, (7) and any medical condition that is associated with an increase in intra-abdominal pressure in the postoperative period. Other biological factors that may increase risk include have a connective tissue disorder like Ehlers-Danlos syndrome, history of the aneurysmal disease, a diet high in chickpeas, or lathyrism.[2] Several tumors can occur on the abdominal wall, though these are rare. The most common are desmoid tumors, which often are very locally invasive though histologically benign. Treatment of desmoids often requires full-thickness abdominal wall excision. Despite this, local recurrence rates are 40 to 50%. Most recurrences occur within the first 24 months after surgery. In some cases, adjuvant radiation therapy is recommended especially when the surgical margins are not cleared.[3]

Several tumors can occur on the abdominal wall, though these are rare. The most common are desmoid tumors, which often are very locally invasive though histologically benign. Treatment of desmoids often requires full-thickness abdominal wall excision. Despite this, local recurrence rates are 40 to 50%. Most recurrences occur within the first 24 months after surgery. In some cases, adjuvant radiation therapy is recommended especially when the surgical margins are not cleared.[3] Management of malignant lesions of the abdominal wall requires aggressive resection of the subcutaneous tissues and skin, as well as any involved muscle. Sarcomas are the most common malignant tumors of the abdominal wall and require aggressive resection followed by radiotherapy. Metastatic abdominal wall tumors also exist and may require surgical resection; proposed mechanisms are either via hematogenous or contiguous spread. Reconstruction of the abdominal wall in these cases is usually dictated by the extent of resection and the possible need for further oncologic surgical intervention.

The complications of abdominal wall reconstruction are similar to any other major abdominal surgery. Adhesion lysis is often required intraoperatively, and the risk of bowel perforation should be discussed with the patient, including the very rare need for an ostomy if the bowels cannot be safely closed primarily. Since this surgery often requires extensive dissection and undermining of the skin and soft tissue, wound complications remain a real concern. These can range from simple surgical site infections to deep space infections or significant skin/subcutaneous/flap necrosis. Mesh infections are a dreaded complication of abdominal wall reconstruction, but typically can be minimized with good preoperative optimization, surgical technique, and appropriate use of mesh prosthetics and peri-operative antibiotics.

The management of abdominal wall defects is challenging and complex. While once the domain of the general surgeon, today it is realized that reconstruction of the abdominal wall may also require the expertise of a plastic surgeon. To achieve optimal outcomes, the goals and objectives of the abdominal wall reconstruction have to be defined and thoroughly discussed with the patient before taking the patient to surgery. In some cases, chronic infection may preclude definitive repair in a single stage, consultation with an infectious disease specialist may be prudent. As with any other complex procedure, the preoperative workup must be thorough, and the patient should be seen by a pulmonologist and cardiologist to optimize lung and cardiac function if any underlying cardiopulmonary disease is present. Because of the potential risk of injury to the bowel, bowel preparation is recommended. If an enterotomy occurs during surgery, prompt consultation from a general or colorectal surgeon is appropriate.[9] To improve outcomes, the Ventral Hernia Working group has developed a 4-tier grading system based on the risk of a surgical site complication.[10] However, evidence-based guidelines regarding the best approach for abdominal wall reconstruction are not available because of the heterogeneity in technique, types of sutures used, different prosthetic material, lack of long-term follow up and patient characteristics. While studies show that the laparoscopic approach may have a better outcome compared to the open approach, the former is also associated with a high rate of bowel injury and conversion to an open procedure, leading some surgeons to question the validity of those conclusions.

To improve outcomes, the Ventral Hernia Working group has developed a 4-tier grading system based on the risk of a surgical site complication.[10] However, evidence-based guidelines regarding the best approach for abdominal wall reconstruction are not available because of the heterogeneity in technique, types of sutures used, different prosthetic material, lack of long-term follow up and patient characteristics. While studies show that the laparoscopic approach may have a better outcome compared to the open approach, the former is also associated with a high rate of bowel injury and conversion to an open procedure, leading some surgeons to question the validity of those conclusions. In the postoperative period, the role of the nurse and pharmacist is critical. The patients have to be monitored for pain, wound infection, fistula formation, and a variety of common postoperative complications such as atelectasis, deep vein thrombosis, ileus, and pain. The pharmacist may be involved in parenteral nutrition if a complication has resulted. With each attempt at reconstruction, there is a 10% to 20% risk of recurrence; it is best to optimize the patient in every way possible prior to any attempt at repair to minimize the need for a revision procedure. This further emphasizes the need for an multi-disciplinary team approach to the management of complex abdominal reconstructions. [11] [Level A]