Catheter for transdiaphragmatic pressure and diaphragm...

A - Human Necessities – 61 – B

Patent

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Details

A61B 5/0492 (2006.01) A61B 5/03 (2006.01) A61B 5/042 (2006.01) A61B 5/0488 (2006.01) G01L 9/00 (2006.01)

Patent

CA 2455287

A first aspect of the present invention is concerned with a double-helix electrode structure for sensing electrical activity of a patient's diaphragm, comprising first and second helical electrodes disposed in a double-helix arrangement for being positioned in the gastro-esophageal sphincter of the patient's diaphragm in view of sensing electrical activity of the patient's diaphragm. According to a second aspect, the present invention provides a pressure detection and acquisition device comprising a semiconductor substrate, a pressure sensor implemented on the semiconductor substrate and producing, when subjected to an external pressure, a pressure representative signal, and a signal acquisition and transmission circuit integrated to the semiconductor substrate, connected to the pressure sensor, and supplied with the pressure representative signal. A third aspect of the present invention relates to an EMG di signal and pressure acquisition catheter comprising an esophageal catheter having an EMG di signal and pressure acquisition portion, an EMG di signal detection electrode structure mounted on the acquisition catheter portion to detect an EMG di signal produced by the patient's diaphragm, a gastric pressure sensor mounted on the acquisition catheter portion on a first side of the electrode structure to detect the patient's gastric pressure, an esophageal pressure sensor mounted on the acquisition catheter portion on a second side of the electrode structure opposite to the first side to detect the patient's esophageal pressure, and an acquisition and transmission circuit connected to the electrode structure and the gastric pressure and esophageal pressure sensors, and supplied with the detected EMG di signal and gastric and esophageal pressure.

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