The Gold standard investigation for Gastro-esophageal reflux disease is:: (A) Endoscopy, (B) 24 hour pH recording, (C) Oesophageal manometry, (D) Measurement of length of lower oesophageal sphincter
Answer is B. b. 24 hour pH recording(Ref: Nelson's 20/e p1787-1788, Ghai 8/e p 280)Extended esophageal pH monitoring of distal esophagus, provides a quantitative sensitive documentation of acidic reflux episodes, the most important type of reflux episodes for pathologic reflux