System and method for measuring contact impedance of electrode

A contact impedance, electrode technology, applied in the directions of diagnostic recording/measurement, application, electrical connection testing, etc., can solve the problems of complex system, increased calculation time, low signal quality and reliable measurement

Inactive Publication Date: 2015-06-03
DRAGERWERK AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, drawbacks associated with these and other methods for measuring contact impedance include lower reliable measurements of signal quality, increased computation time, and the complexity of the systems required to make this measurement

Method used

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  • System and method for measuring contact impedance of electrode
  • System and method for measuring contact impedance of electrode
  • System and method for measuring contact impedance of electrode

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Embodiment Construction

[0018] A system for measuring contact impedance (hereinafter "system") automatically measures, calculates and quantifies the quality of the connection between electrodes and the patient. Connection quality is determined by measuring impedance at the interface between electrodes connected to the patient and the patient's skin. This is called contact impedance, and during monitoring of the patient, the system advantageously measures and determines the contact impedance of each electrode. By measuring contact impedance during monitoring of a patient, a medical professional can note in real time conditions indicative of a degraded connection of one or more electrodes connected to the patient. This allows healthcare professionals to remedy situations that would otherwise result in signals sensed through the electrodes being of lower quality than desired, resulting in data produced that does not accurately represent the patient's current condition. Connection quality data for a par...

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Abstract

An apparatus and method that determines a quality of a connection of an electrode to a patient is provided. The apparatus includes at least three electrodes selectively connected to a patient for sensing an electrophysiological signal representing a patient parameter. A current source is connected to each of the at least three electrodes, the current source able to apply both a positive current and a negative current. A control processor is connected to the current source and the at least three electrodes. The control processor identifies a number of unique electrode pairs of the at least three electrodes and controls the current source to simultaneously apply a positive current to one electrode and a negative current to an other electrode of each identified electrode pair to determine a connection quality for at least one of the at least three electrodes.

Description

technical field [0001] The present invention relates to a system and method for use in patient monitoring devices, and more particularly, for measuring the contact impedance of electrodes to determine the quality of the connection associated with the electrodes. Background technique [0002] During the course of providing medical care to a patient, it is necessary to monitor vital statistics and other patient parameters. Different types of patient monitoring devices can monitor the physiological state of a patient via at least one electrode coupled to the patient's skin at various locations on the body. For example, the electrical activity of the heart is regularly monitored in a clinical setting using an electrocardiogram (ECG) monitor. The ECG monitor is connected to the patient through a plurality of electrodes that monitor the electrical pulses of the patient's heart. In order for the ECG monitor to effectively register the patient's electrical impulses, the electrodes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0424A61B5/0402A61B5/276
CPCA61B5/276A61B5/301A61B5/318G01R31/66A61B5/25A61B5/316A61B5/339A61B5/0006A61B5/6843A61B5/7221A61B5/7246A61B5/746A61B2562/0214
Inventor D·K·弗里曼C·M·里舍凯利D·C·毛雷尔
Owner DRAGERWERK AG
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