Transoral Incisional Fundoplication (TIF) for Patients Suffering From Gastroesophageal Reflux Disease in an Asian Population

Transoral incisionless fundoplication (TIF) has become a widely used intervention to restore the valve at the gastroesophageal junction in selected patients suffering from gastroesophageal reflux disease (GERD). More than 20,000 procedures have been performed worldwide. TIF with EsophyX device reconfigures the tissue to establish an omega-shaped full-thickness gastroesophageal valve from inside the stomach. The procedure creates serosa to serosa plications which include the muscle layers and constructs valves 3-5cm long, taking in 200-270 degrees of the circumference, and deploying multiple non-absorbable polypropylene fasteners through the two layers in a circumferential patten around the gastroesophageal junction. Data so far indicate that, in the majority of patients, the procedure achieves lasting improvement in GERD symptoms measured by either pH or impedance monitoring. The technique offers an acceptable alternative to surgery, mimicking partial fundoplication, but less invasive and with no persistent side effects, in patients with proven pathological GERD with either a competent gastroesophageal valve or hiatal hernia, not longer than 3cm, who refuse, are intolerance, or are unresponsive to PPI maintenance therapy. Laparoscopic fundoplication, although still considered to be the gold-standard approach for GERD refractory to medical treatment, does involve some risk of long-term adverse events such as dysphagia (5-12%), inability to vomit or belch, gas/bloat syndrome (19%) and excessive flatulence. Several prospective observational studies and some comparative trials have proved efficacy of TIF with EsophyX in obtaining a significant reduction in the acid exposure time (AET) assessed by esophageal 24-hour pH-impedance monitoring versus sham, and in controlling both typical and atypical GERD symptoms for up to 1 to 2 years, as reported in a meta-analysis7. Outcomes at 3, 5, and 10 years have been reported in different studies and showed to be favourable. In an Italian study reporting the 10 year follow-up, the GERD-HRQL score, heartburn and regurgitation score were significantly lower than pre-procedure and did not change significantly during the follow-up. The rates of patients who had stopped or halved anti-secretive therapy 2, 3, 5, 7 and 10 years after the procedure were 86.7%, 84.4%, 73.5%, 83.3% and 91.7% respectively. This procedure, however, has not been performed in Asia patients. Asians have smaller body build and is known to have less GERD when compared to the Caucasian population. This study, therefore, is a feasibility study to perform TIF in an Asian population. In patients who fulfil the inclusion criteria, TIF will be performe under general anaesthesia. They will then be followed-up at 4 weeks, 3 months, then yearly for up to 5 years after the procedure. The anti-reflux control and adverse events will be recorded.