476. PATIENTS WITH TRACHEOSTOMY HAVE HIGHER INCIDENCE OF ESOPHAGEAL REFLUX AND DON’T PRESENT TYPICAL SYMPTOMS

Lung diseases have a strong relationship with gastroesophageal reflux disease (GERD). It has been previously demonstrated that conditions such as tracheal stenosis, asthma and even lung transplantation may worsen with reflux and these patients have few symptoms of GERD. With the COVID-19 pandemic, the number of people who needed mechanical ventilation and tracheostomy increased. Our objective was to demonstrate the prevalence of gastro-oesophageal reflux (GER) in patients with tracheostomy and describe its characteristics. Esophageal manometry and 24 h pH-metry was performed in 137 consecutive patients with a tracheostomy already in a chronic phase, independent of symptoms. Inquire on respiratory and digestive symptoms was also carried out at the time of the examination. Prevalence of gastroesophageal reflux was identified in this population and description of the groups with reflux and without it, as well as comparison between them. Of the 137 patients, 49 were male, the average age was 40.94 ± 17.3 and the BMI was 26.3 ± 4.85. The prevalence of GER was 45.2%. Characteristics were similar between the groups with and without reflux. In the reflux group, the mean DeMeester score was 36.5 ± 20.8 and the presence of lower sphincter hypotonia was found in 31% of the patients and was not correlated with reflux (p = 0.285). 48% had heartburn symptoms and only 30% had a combination of heartburn and regurgitation. There was no association with higher DeMeester score and presence of symptons (p = 0,14). The presence of tracheostomy is related to an increased prevalence of reflux, even without typical symptoms most of the time. The mechanism for this is still unknown, perhaps the altered respiratory dynamics has a role. These patients should be investigated with functional exams if they develop any condition that may be affected by reflux.