Normally a 12 hour study with these physiological parameters monitored:
Air Flow / Chest wall Impedance / Abdominal Impedance / Activity / ECG / Oxygen Saturation / Position / Snoring
ph Esophogram Study
Normally a 24 hour study using a dual channel probe allowing for monitoring Acid reflux both at the LES and the UES simultaneously.
ph Impedance Study
Normally a 24 hour study that combines a pH Acid Reflux sensor along with movement impedance channels allowing for monitoring of movement of material in the esophagus, either Acid or Alkaline in nature.