Surgery – Diagnostic testing – Measuring electrical impedance or conductance of body portion
Patent
1995-12-19
1998-11-10
Hindenburg, Max
Surgery
Diagnostic testing
Measuring electrical impedance or conductance of body portion
600593, A61B 505
Patent
active
058336257
ABSTRACT:
An ambulatory system for recording and analyzing gastroesophageal reflux is presented. The system includes a digital recorder, an analysis software package and a catheter for measurement of changes in esophageal impedance. For the first time, gastroesophageal reflux can be detected with a pH above 4 (called alkaline reflux), which is the normal pH environment of the healthy esophagus. In addition, one embodiment of the invention allows for the determination of the direction of flow of the detected material in the esophagus, thus enabling the system to distinguish between swallowed saliva and alkaline gastroesophageal reflux. In yet a further embodiment, the present invention allows for recording and analysis of reflux on a non-invasive basis, by using pairs of externally worn impedance sensors. In another embodiment, the invention measures impedance simultaneously with other bio-parameters, such as pH or pressure.
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Glazier Stephen C.
Hindenburg Max
Synectics Medical AB
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