Development of a portable prototype: pH meter for prolonged esophageal pH monitoring with low cost materials

Esophageal pH and Combined Impedance-pH Monitoring in Children

Esophageal pH monitoring is considered the gold standard for the diagnosis of gastroesophageal reflux disease because of the normal ranges across the pediatric age range. However, this method can only detect acid reflux. Multichannel intraluminal impedance-pH (MII-pH) monitoring has recently been used for the detection of bolus reflux in infants and children. This method allows for the detectio...

Usefulness of proximal esophageal pH monitoring.

pH Measurement with a fiber-optic tissue-pH monitor and a standard blood-pH meter.

Continuous monitoring of the pH of tissue with a glass electrode was initially introduced by Stamm et al. (1). Its potential value in monitoring the high-risk fetus during labor has been demonstrated in several studies (2-4). However, this technique has not been clinically accepted for routine use in labor, mostly because of problems with the application and sustained proper attachment of the r...

How to Interpret Esophageal Impedance pH Monitoring

Esophageal impedance pH monitoring provides quantitative data on esophageal acid exposure and has the ability to correlate the symptoms with acid exposure events. The nomenclature for the reflux patterns detected in impedance pH monitoring as well as the normal values have been determined. Data interpretation is similar to 24-hour pH monitoring, ie, searching for an increase in the number of re...

Ambulatory esophageal pH monitoring: new directions.

pH testing remains a commonly used evaluative tool in clinical practice. However, the original tool that included a nasally placed pH catheter was plagued with a variety of shortcomings, primarily the effect of the procedure on patients' lifestyle and thus on reflux-provoking activities. The miniaturization of evaluative techniques in gastroenterology was the impetus for the development of the ...