Catheter for transdiaphragmatic pressure and diaphragm electromyogram recording using helicoidal electrodes
First Claim
1. A double-helix electrode structure for sensing electrical activity of the diaphragm of a patient, comprising first and second helical electrodes disposed in a double-helix arrangement for being positioned in the gastro-oesophageal sphincter of the patient'"'"'s diaphragm in view of sensing electrical activity of the patient'"'"'s diaphragm.
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Abstract
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. Other aspects of the present invention relate to an EMGdi signal and pressure acquisition catheter.
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Citations
33 Claims
- 1. A double-helix electrode structure for sensing electrical activity of the diaphragm of a patient, comprising first and second helical electrodes disposed in a double-helix arrangement for being positioned in the gastro-oesophageal sphincter of the patient'"'"'s diaphragm in view of sensing electrical activity of the patient'"'"'s diaphragm.
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9. A pressure detection and acquisition device, comprising:
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a semiconductor substrate;
a pressure sensor implemented on the semiconductor substrate, said pressure sensor producing, when subjected to an external pressure, a pressure representative signal; and
a signal acquisition and transmission circuit integrated to the semiconductor substrate, said signal acquisition and transmission circuit being connected to the pressure sensor and supplied with the pressure representative signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An EMGdi signal and pressure acquisition catheter, comprising:
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an esophageal catheter having an EMGdi signal and pressure acquisition portion;
a EMGdi signal detection electrode structure mounted on the acquisition portion of the esophageal catheter to detect an EMGdi signal produced by the diaphragm of a patient;
a gastric pressure sensor mounted on the acquisition portion of the esophageal catheter on a first side of the EMGdi signal detection electrode structure, to detect gastric pressure of the patient;
an esophageal pressure sensor mounted on the acquisition portion of the esophageal catheter on a second side of the EMGdi signal detection electrode structure opposite to said first side, to detect esophageal pressure of the patient; and
an acquisition and transmission circuit connected to the EMGdi signal detection electrode structure, the gastric pressure sensor and the esophageal pressure sensor, and supplied with the detected EMGdi signal, the detected gastric pressure and the detected esophageal pressure. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification