Key Techniques and Complication Prevention of Laparoscopic Adjustable Gastric Banding

**Laparoscopic Adjustable Gastric Bandaging**

Precise placement of the adjustable bandage in the latissimus dorsi is crucial for surgical success and reducing complications. Equally important is securing the bandage to the stomach wall to prevent slippage and reduce the risk of corrosion. The abdominal access technique is consistent with gastric bypass surgery. The patient is in a leg-split position, with the surgeon operating between the patient's legs. Alternatively, the patient can be supine, with the surgeon operating on the patient's right side. Six puncture ports may be required. One puncture port serves as the observation port for the endoscope, and one is the surgeon's right-hand operating port. Compared to gastric bypass surgery, bandage surgery requires higher observation ports, which facilitates observation of the His angle's mobility and gastric wall suturing. The placement of the puncture ports is critical. Connecting the bandage through the retroesophageal space is essential. The angle follows the path below the esophageal sphincter through the stomach to the left side. The bandage should exit at the His angle. Another key point is to pass the grasper with minimal anatomical dissection. Small veins passing through the bandage junction are prominent anatomical landmarks.

There are a few things to keep in mind when securing the bandage by suturing it to the stomach wall. Usually, 2-4 stitches are needed. The first stitch is placed near the bandage's buckle, maintaining a certain distance between the stitch and the buckle. Pull the first stitch to the right side to facilitate the placement of the next two stitches between the fundus and the cardia, towards the His angle. Generally, a small 9.75cm bandage is suitable for smaller, uniformly obese female patients. Larger bandages are suitable for centrally obese male patients, especially those with more fat at the cardia.

One easily overlooked but crucial step is placing the bandage through the puncture site. The puncture site and connecting tube can cause serious problems. In most cases, these problems can be easily resolved under local anesthesia. The placement site varies. Initially, we placed the bandage infusion pump on the right side of the abdomen. While convenient for placement, this wasn't the optimal location. We and several other physicians found the best location to be above the umbilicus, next to the midline of the abdomen. Proper skin incision is also important when placing the subcutaneous infusion pump. The rectus abdominis fascia should be clearly visible, and the skin should be sutured at the end. To minimize the risk of pump twisting or slippage, four sutures should be used to secure it in place. Deep retractors should be used during suturing to facilitate exposure and suturing.

Surgeons vary in their approach to adjusting bandages. The main difference lies in whether adjustments are made under fluoroscopy or directly in the examination room. There is no statistical data to suggest which method is more beneficial. One advantage of adjusting bandages under fluoroscopy is the ease of positioning and fluid injection. Additionally, a barium meal of the upper gastrointestinal tract can be performed; if reflux from the gastric pouch into the esophagus or esophageal contractions occur, it indicates the bandage is too tight. Most patients with tight bandages are asymptomatic. Early detection of tight bandages can prevent difficulty eating. Regardless of the adjustment method, the injection needle should only be removed after confirming there is no outflow obstruction. The underlying principle is obvious, but it's important to understand that successful insertion of the injection needle the first time does not guarantee successful insertion the second time. Furthermore, confirming unobstructed flow from the subcutaneous pump to the bandage is crucial. In some cases, we have found that if the bandage integrity is compromised, fluid can be injected but not withdrawn; injecting intravenous contrast agent can pinpoint the location of the leak in the system. In cases of contrast agent allergy, a simple injection of 2 cm³ of air can be detected by X-ray of the right diaphragm.

Issues related to corrective bariatric surgery are not discussed in this chapter. Examples include correcting fundoplication to gastric bypass, banding to gastric bypass, and vertical gastric banding to gastric bypass with bandage removal. In these cases, preoperative preparation is crucial, including reviewing previous surgical records, performing upper gastrointestinal endoscopy, and proximal gastrointestinal contrast studies. Laparoscopic reoperation requires meticulous endoscopic technique. When performing corrective reoperation, the need for conversion to open surgery should be reduced. When using staplers in reoperation, careful selection of the appropriate staple height is essential. In some cases, even 4.8mm green staples are insufficient to open the stomach. In such situations, the surgeon needs to utilize internal suturing techniques to create a gastric pouch.

**in conclusion**

Many techniques can facilitate laparoscopic bariatric surgery; however, experience in this area is irreplaceable. There is something to learn in every case. In this rapidly evolving specialty, bariatric surgeons should maintain an open mind to learn new technologies and methods.