The Effects of Preoperative Botulinum Toxin A Injection Prior to Abdominal Wall Reconstruction Procedures on Respiratory System Function

Hernias are frequent complications following abdominal procedures, particularly in cases of large defects which may lead to the "loss of domain" effect. This phenomenon involves permanent displacement of organs into an alternative space, reducing the effective capacity of the peritoneal cavity. Surgical management of giant hernial sacs is challenging due to insufficient space within the abdominal cavity to accommodate organ repositioning.

Abdominal wall reconstruction specialists have developed various techniques to address these complexities. One increasingly utilized method involves the injection of botulinum toxin A (BTA) into the lateral abdominal muscles (external oblique, internal oblique, and transverse muscles). BTA induces temporary muscular paralysis lasting approximately 6-8 months. This paralysis extends the muscle compartment, thereby increasing abdominal cavity volume. This expansion facilitates the approximation of rectus abdominis muscles and the closure of fascial defects.

Initial attempts to employ BTA for the treatment of giant abdominal hernias began in 2009. Since then, its role in abdominal wall surgery has grown steadily. Optimal timing for surgery post-BTA injection is typically 3-4 weeks, when maximal muscle extension and abdominal volume increase (up to 20-30%) are observed.

Despite widespread clinical use, standardized protocols for BTA application remain lacking due to limited comparative studies and small sample sizes in existing literature. Rare allergic reactions aside, comprehensive documentation of adverse effects from BTA injections remains minimal. However, variability in patient response suggests potential differences in treatment efficacy.

Respiratory efficiency poses a significant challenge in patients with giant abdominal hernias, exacerbated by the "loss of domain" effect which impairs diaphragm function and alters respiratory mechanics. Predicting perioperative outcomes is further complicated by advanced age, comorbidities, and obesity among affected patients.