24 hour ambulatory impedance pH test

24 Hr Ambulatory Impedancehr ambulatory impedance pH Testtest

66 year oldPatient being evaluated for dyspepsia and heart burngastroesophageal reflux.

Description of Operation/Procedureoperation/procedure: The procedure was performed by placing an impedance pH probe (Comfor Tec MII.pH, Sandhill Scientific) that was attached to an ambulatory impedance pH recorder (Sandhill Scientific). The 2.13 mm probe has 8 impedance sensors that are 2 cm apart and 2 antimony pH sensors, 15 cm apart. The probe was calibrated before placement into the esophagus. The impedance pH probe was advanced via the nares into the esophagus, after nasal lubrication. The probe was placed such that the distal pH channel was located in the stomach, 10 cm below the LES and the proximal pH channel was located in the esophagus, 5 cm proximal to the LES. The impedance sensors were located at 2, 4, 6, 8, 10, 12, 14 and 16 cm above the LES in the esophagus. The location of the lower esophageal sphincter was previously determined by manometry. The patient was encouraged to conduct normal daily activities throughout the study including consuming usual regular meals and usual activity and to record these events using an event button as well as on a symptom diary. The patient Pepcid's antireflux therapy was stopped 1 week before the test. The recordings were carried out for 23 hours and 50 minutes and were subsequently downloaded to a computer for graphic display and analysis. The tracing was analyzed manually as well as by using the computer software analysis (Sandhill Scientific) for acid reflux and non-acid reflux events and correlation of symptoms with these events.