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What is GERD is best diagnosed by? and explain in detail?
Ans. (a) 24 hour pH monitoringRef.: Harrison 19th ed. / 261-2* Ambulatory 24-hour pH monitoring is the criterion standard in establishing a diagnosis of GERD, with a sensitivity of 96% and a specificity of 95%. It quantifies the gastroesophageal reflux and allows a correlation between the symptoms of reflux and the episodes of reflux.* However the diagnosis can be established on basis of Upper Gastrointestinal endoscopy with esophageal manometry.