Defibrillator display

Patent metadata

Field	Value
Publication number	US-9788734-B2
Application number	US-201615161515-A
Country	US
Kind code	B2
Filing date	May 23, 2016
Priority date	Feb 12, 2010
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

An external defibrillator system is provided. The system includes: a graphical display; one or more sensors for obtaining data regarding chest compressions performed on a patient; and a controller configured to display on the graphical display numeric values for depth and/or rate of the chest compressions based upon the data from the one or more sensors. A method for using an external defibrillator including the steps of: obtaining data regarding chest compressions performed on a patient; and displaying on a graphical display screen of the defibrillator numeric values for depth and/or rate of the chest compressions based upon the data is also provided.

First claim

What is claimed is:

1. An external defibrillator system comprising:
a display;
an accelerometer comprised in a housing configured to be placed on a patient's sternum for obtaining data comprising at least one of acceleration, velocity or displacement of the sternum as a result of chest compressions performed on the patient;
a processor configured to determine sternal displacement and compression rate from the data and to compare the sternal displacement to a predetermined maximum acceptable sternal displacement value and a predetermined minimum acceptable sternal displacement value for sternal displacement; and
a controller configured to:
display on the display one or more numeric values of a unit length of the determined sternal displacement during chest compressions, the displayed values having at least two significant figures and a resolution of less than an inch, provide a visual indication of when the determined sternal displacement is above the predetermined maximum acceptable sternal displacement value and when the determined sternal displacement is below the predetermined minimum acceptable sternal displacement value, the visual indication comprising highlighting of the numerical value of the unit length of the determined sternal displacement, and
display on the display one or more numeric values for compression rate.

2. The external defibrillator system of claim 1 , wherein the highlighting of the numerical value of the unit length of the determined sternal displacement comprises changing a color of the numerical value of the unit length of the determined sternal displacement.

3. The external defibrillator system of claim 1 , wherein the processor is further configured to compare the compression rate to a predetermined maximum acceptable rate value and a predetermined minimum acceptable rate value and provide a visual indication of when the compression rate is above the predetermined maximum acceptable rate value or below the predetermined minimum acceptable rate value.

4. The system of claim 1 , further comprising one or more electrodes for receiving information about the patient's heart activity, and wherein the controller is configured to display on the display, with the numeric values, an electrocardiogram trace of the patient.

5. The system of claim 4 , wherein displaying the electrocardiogram trace comprises moving the electrocardiogram trace laterally across the display.

6. The system of claim 4 , wherein the controller is further configured to display an unfiltered electrocardiogram, determine that chest compressions have commenced on the patient, and subsequently display a filtered electrocardiogram.

7. The system of claim 4 , further comprising one or more sensors for obtaining CO 2 data for the patient, wherein the controller is configured to display one or more numbers representing the CO 2 data along with the electrocardiogram.

8. The system of claim 1 , wherein the controller is configured to determine the numeric value of the unit length of the determined sternal displacement during chest compressions by double integrating measurements from the accelerometer.

9. The system of claim 1 , wherein the controller is further configured to display on the display an indication of an idle time since chest compressions were last detected.

10. The system of claim 1 , wherein the controller is further configured to display on the display a visual indication indicative of whether the chest compressions are being performed properly.

11. The system of claim 10 , wherein the visual indication indicative of whether the chest compressions are being performed properly is displayed adjacent to the one or more numeric values.

12. The system of claim 10 , wherein the controller is configured to change a color of the visual indication based on whether the chest compressions are being performed properly or improperly.

13. The system of claim 10 , wherein the visual indication comprises highlighting or font color of the displayed numeric values, and wherein the highlighting or the font color is based on whether the numeric value is within or outside of an acceptable range.

14. The system of claim 10 , wherein the visual indication comprises a shape with an amount of fill in the shape differing based upon the determined sternal displacement and, optionally, the rate of chest compressions.

15. The system of claim 14 , wherein the shape is fully filled when the determined sternal displacement and, optionally, the rate of chest compressions fall within acceptable ranges.

16. The system of claim 14 , wherein the shape is partly filled when the determined sternal displacement and, optionally, the rate of chest compressions fall below acceptable ranges.

17. An external defibrillator system comprising:
a display;
an accelerometer comprised in a housing configured to be placed on a patient's sternum for obtaining data comprising at least one of acceleration, velocity or displacement of the sternum as a result of chest compressions performed on the patient;
a processor configured to determine sternal displacement and compression rate from the data and to compare the sternal displacement to a predetermined maximum acceptable sternal displacement value and a predetermined minimum acceptable sternal displacement value for sternal displacement;
one or more sensors for obtaining CO 2 data for the patient;
one or more electrodes for receiving information about the patient's heart activity; and
one or more sensors for obtaining SpO 2 data for the patient,
a controller configured to
display on the display one or more numeric values of a unit length of the determined sternal displacement during chest compressions, the displayed values having at least two significant figures and a resolution of less than an inch, provide a visual indication of when the determined sternal displacement is above the predetermined maximum acceptable sternal displacement value and when the determined sternal displacement is below the predetermined minimum acceptable sternal displacement value, the visual indication comprising highlighting of the numerical value of the unit length of the determined sternal displacement, and
display on the display one or more numeric values for compression rate, wherein the controller is configured to change between displaying one or more numbers representing the SPO 2 data and one or more numbers representing the CO 2 data in response to sensing that chest compressions have commenced on the patient.

18. A method for using an external defibrillator, the method comprising:
obtaining data from an accelerometer comprised in a housing configured to be placed on a patient's sternum comprising at least one of acceleration, velocity or displacement of the sternum as a result of chest compressions performed on the patient;
determining sternal displacement and compression rate from the data and comparing the sternal displacement to a predetermined maximum acceptable sternal displacement value and a predetermined minimum acceptable sternal displacement value for sternal displacement; and
displaying on a display of the defibrillator one or more numeric values of a unit length of the determined sternal displacement during chest compressions, the displayed values having at least two significant figures and a resolution of less than an inch, providing a visual indication of when the determined sternal displacement is above the predetermined maximum acceptable sternal displacement value and when the determined sternal displacement is below the predetermined minimum acc

Assignees

• Zoll Medical Corp

Inventors

• Tan Qing
• Freeman Gary A
• Geheb Frederick J
• Bures Martin E
• Silver Annemarie

Classifications

• A61N1/0492

  Patch electrodes (A61N1/0412, A61N1/0428 take precedence) · CPC title

• A61N1/3975

  Power supply (A61N1/378 takes precedence) · CPC title

• A61H2230/205

  partial CO2-value · CPC title

• A61N1/046

  Specially adapted for shock therapy, e.g. defibrillation · CPC title

• A61B5/7282

  Event detection, e.g. detecting unique waveforms indicative of a medical condition (cough events A61B5/0823; seizures A61B5/4094; sleep apnoea A61B5/4818) · CPC title