Balloon adjustment
Patients who were intolerant to the balloon could have its volume adjusted downward, and those in the adjustment group had the volume adjusted upward by a standard volume of 250 mL in the course of the treatment.
On the five days before the balloon adjustment, patients were instructed to eat a liquid diet. The procedure was done under deep intravenous sedation. The endoscopy was held, and the following sequential steps:
1. Seizure valve cover blue nylon loop strap with a foreign body forceps;
2. Pull out the scope carrying the valve together, unscrews the protective cover, and connects the adjustment catheter (the same one used for filling in the implant);
3. The balloon volume is then reduced (aspirating the liquid inside the balloon through the catheter with 60 mL syringe) or increased (by injecting fluid through the catheter using a 60 mL syringe);
4. The adjustment catheter is then pulled up to externalize the valve through the mouth in the same way of the balloon implant and then, disconnected from the valve;
5. The protective cover is placed again;
6. Return the valve to the gastric cavity.