Ohmega detects reflux activity using Impedance and categorizes these reflux episodes as acidic or non-acidic (weakly acidic), using traditional pH measurement. Gas and mixed liquid/gas reflux episodes are analyzed as well.

Traditional pH recording only records acidic pH reflux episodes. Impedance-pH detects both acidic and non-acidic reflux episodes. Combined Impedance-pH recording is clinically useful in the evaluation of symptoms under PPI therapy, as well as for hoarse-ness, unexplained cough, and applications of particular interest.