Best method to diagnose GERD is: (A) Oesophageal pH determination, (B) Endoscopy, (C) Barium swallow, (D) Laparoscopy
Answer is A. 24 hours oesophageal pH monitoring is the gold standard investigation. PPI should be stopped for 3 weeks prior to pH monitoring. Dual probe pH monitoring(one in distal oesophagus and one in proximal oesophagus) is used to confirm the respiratory complication of GERD. Reference: SRB's Manual of Surgery, 6th Edition, page no= 782.