SELECTIVELY DISPLAYING FILTERED PHYSIOLOGICAL PARAMETERS

1 . A monitor-defibrillator, comprising:

a detection circuit configured to detect an electrocardiogram (ECG) signal of a subject;

an analog-to-digital converter (ADC) configured to convert the ECG signal into unfiltered ECG data;

a transceiver configured to receive a signal from a mechanical chest compression device, the signal indicating a frequency at which the mechanical chest compression device is administering chest compressions to the subject;

a display; and

a processor configured to:

generate a comb filter that rejects the frequency and harmonics of the frequency;

generate filtered ECG data by applying the comb filter to the unfiltered ECG data;

cause the display to visually present the unfiltered ECG data at a first emphasis; and

cause the display to visually present the filtered ECG data at a second emphasis, the second emphasis being greater than the first emphasis.

2 . The monitor-defibrillator of claim 1 , the filtered ECG data being first filtered ECG data, the processor being further configured to:

determine, by analyzing the unfiltered ECG data or the filtered ECG data, a transition between chest compressions administered by the mechanical chest compression device to chest compressions administered by a rescuer;

generate second filtered ECG data by applying an alternate filter to the unfiltered ECG data detected during the chest compressions administered by the rescuer; and

cause the display to visually present the second filtered ECG data at a third emphasis, the third emphasis being different than the second emphasis.

3 . The monitor-defibrillator of claim 1 , the processor being further configured to:

detect, by analyzing the unfiltered ECG data or the filtered ECG data, a chest compression artifact in the unfiltered ECG data; and

cause the display to visually present a symbol indicating a time at which the chest compression artifact is in the unfiltered ECG data.

4 . A method performed by a first medical device, the method comprising:

detecting an analog signal indicating a physiological parameter of a subject;

converting the analog signal to first data;

determining a treatment parameter characterizing a treatment administered to the subject by a second medical device;

generating a filter characterized by the treatment parameter;

generating second data by applying the filter to the first data; and

displaying, on a user interface, the first data and the second data, wherein the second data is emphasized on the user interface.

5 . The method of claim 4 , wherein the physiological parameter comprises an electrocardiogram (ECG), a capnograph, a transthoracic impedance, a force administered to a user, a blood pressure, an airway parameter, a partial pressure of oxygen, an electroencephalogram (EEG), a temperature, a blood flow, or a pulse rate.

6 . The method of claim 4 , wherein determining the treatment parameter comprises:

determining, by analyzing the first data, a frequency of the treatment.

7 . The method of claim 4 , wherein determining the treatment parameter comprises:

receiving, from the second medical device, a signal indicating the treatment parameter.

8 . The method of claim 4 , further comprising:

determining that the second data is more reliable than the first data.

9 . The method of claim 4 , wherein displaying the first data and the second data comprises overlaying and time-aligning the first data and the second data on the user interface.

10 . The method of claim 4 , wherein displaying the first data and the second data comprises:

displaying a first waveform representing the first data; and

displaying a second waveform representing the second data.

11 . The method of claim 10 , wherein the first waveform comprises a different color than the second waveform, the first waveform comprises a different contrast than the second waveform, the first waveform comprises a different line size than the second waveform, the first waveform comprises a different transparency than the second waveform, or the first waveform comprises a different line style than the second waveform.

12 . The method of claim 4 , the physiological parameter comprising a first physiological parameter, the method further comprising:

detecting a second physiological parameter of the subject;

generating third data indicative of the second physiological parameter; and

displaying, on the user interface, a waveform representing the third data.

13 . The method of claim 4 , further comprising:

detecting, by analyzing the first data or the second data, an event indicative of the treatment; and

displaying, on the user interface, a symbol indicating the event.

14 . An external defibrillator comprising:

a discharge circuit configured to administer a first treatment to a subject;

a sensor configured to detect a physiological parameter of the subject;

a display; and

a processor configured to:

generate first data indicating the physiological parameter of the subject;

determine a treatment parameter characterizing a second treatment administered to the subject;

generate a filter characterized by the treatment parameter;

generate second data by applying the filter to the first data; and

cause the display to visually present the first data at a first emphasis and the second data at a second emphasis.

15 . The external defibrillator of claim 14 , wherein causing the display to visually present the first data and the second data comprises:

causing the display to visually present a first waveform representing the first data; and

causing the display to visually present a second waveform representing the second data.

16 . The external defibrillator of claim 15 , wherein the second emphasis is greater than the first emphasis, and

wherein the first waveform comprises a different color than the second waveform, the first waveform comprises a smaller contrast than the second waveform, the first waveform comprises a smaller line size than the second waveform, the first waveform comprises a greater transparency than the second waveform, or the first waveform comprises a different line style than the second waveform.

17 . The external defibrillator of claim 14 , wherein the treatment parameter comprises a frequency of the treatment, a time at which the treatment begins being administered to the subject, or a time at which the treatment stops being administered to the subject.

18 . The external defibrillator of claim 14 , the processor being further configured to:

detect, by analyzing the first data or the second data, an event comprising a chest compression, a ventilation, or a QRS sense event; and

display, on the display, a symbol indicating the event.

19 . The external defibrillator of claim 14 , further comprising:

a transceiver configured to receive, from a medical device administering the second treatment, a signal indicating the treatment parameter.

20 . The external defibrillator of claim 14 , wherein the processor is configured to determine the treatment parameter by analyzing the first data or the second data.