The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 1998
Filed:
Dec. 19, 1995
Anders Essen-Moller, Stockholm, SE;
Synectics Medical AB, Stockholm, SE;
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.