Filtering patient signal also for ventilation artifacts

摘要

In embodiments, an external medical device is intended to care for a patient. If it receives an input that signifies that ventilation artifact is present in a signal of the patient, it transmits a corrective signal responsive to the received input. In further embodiments, a patient signal is received, which is generated from a patient while the patient is or was receiving chest compressions at a frequency Fc, and also receiving ventilations at frequency Fv. At least one filter mechanism may be applied to the patient signal to substantially remove artifacts at a) frequency Fc, b) a higher harmonic of frequency Fc, and c) a third frequency substantially equaling frequency Fc plus or minus frequency Fv, while substantially passing other frequencies between them. As a result, the patient signal can be cleaner, for diagnosing the patient's state more accurately.

主权项

1. An external device for use when a patient is receiving ventilations from a ventilator that is being operated by a rescuer, comprising:
a housing; and a processor within the housing configured to:
perform a correlation of a sensed patient electrocardiogram (ECG) signal with an airway signal of the patient;receive, responsive to the performed correlation, an input signifying that a ventilation artifact is present in the sensed patient ECG signal, the ventilation artifact possibly due to the ventilations from the ventilator; andcause to be transmitted a corrective signal responsive to the received input; and a user interface configured to output, responsive to the corrective signal, a prompt to the rescuer.