Johns Hopkins Manual for GI Endoscopic Nurses, Third Edition

Mouen Khashab, MD; Toshunia Robinson, MD; Anthony Kalloo, MD

Chapter 43: Reflux Monitoring (continued)

Ellen Stein, MD; Lisette Musaib-Ali, MD

Reflux is the flow of contents of the stomach upwards into the esophagus. There are several effective methods of monitoring patients for reflux including pH monitoring, wireless pH monitoring, and pH-impedance monitoring. pH monitoring involves the detection of acid. Impedance is the passage of material (gas, liquid, solid) between two measurement points on a catheter and this can be used to identify passage of material through the esophageal lumen. Reflux monitoring techniques all involve placement of a measurement device and then recording of symptoms for the duration of testing. The…