Automatic lead switching for ECG monitor

Details Automatic lead switching for ECG monitor Automatic lead switching for ECG monitor

1996-10-08

1998-08-04

Kamm, William E.

Surgery

Diagnostic testing

Cardiovascular

A61B 50428

Patent

active

057886440

ABSTRACT:
A multi-lead ECG monitor which determines whether the reference electrode has been disconnected and, if so, switches to another reference electrode to continue ECG monitoring. Disconnection of the reference electrode can be determined by observing that no ECG signal is being received from any of the electrodes. When this is detected, the reference electrode is switched to another electrode which is selected in accordance with a predetermined priority scheme. After a stabilization period, the system then determines if any electrodes are still connected. If not, then, as before, it is determined that the new reference electrode is not connected and that a new reference electrode needs to be selected. The switching of the reference electrode continues in this manner until it is determined that electrodes are connected. If sufficient electrodes including the new reference electrode are still connected to the patient to permit ECG monitoring, then ECG monitoring continues and a status message is presented to the operator identifying which electrodes are disconnected. Once complete electrode connection is regained, the ECG monitor automatically switches back to the preferred settings with the desired reference electrode.

REFERENCES:
patent: 4577639 (1986-03-01), Simon et al.
patent: 5022404 (1991-06-01), Hafner
patent: 5025808 (1991-06-01), Hafner
patent: 5333617 (1994-08-01), Hafner
patent: 5582181 (1996-12-01), Ruess
"The electrocardiograph" by authors Clark, et al., John G. Webster, editor, Medical instrumentation--Application and design, Section 6.2, pp. 275-284.

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