GERD is defined as pH of oesophagus< ____ and for > _______% of total day time.
High-Yield Explanation
pH of esophagus< 4 for > 5% of total day time is defined as GERD There is Demeester score for the severity of GERD GERD can be due to * Hiatus Hernia * Incompetent LES (Coffee, tea, stress) GERD causes - Chemical laryngitis, chemical tracheitis - Nocturnal cough* -Asthma -Dental erosions