Multi-resolution graphical display for feedback on chest compression depth

1. A medical device comprising:

a display for providing feedback to a rescuer who is performing Cardio Pulmonary Resuscitation (CPR) chest compressions to a patient, the display structured to graphically indicate an instantaneous value of a measured compression depth of the chest of the patient, the display including:

an indicator range that corresponds at least in part to a compression depth range of some of the measured compression depths, and

an indicator represented as progressing along the indicator range as the depth changes within the compression depth range to represent a value of the measured compression depth in relation to the indicator range,

in which:

when the measured compression depth is passing a first point of the compression depth range, the indicator progresses at a first rate relative to a first difference in the measured compression depth, and

when the measured compression depth is passing a second point of the compression depth range that is distinct from the first point, the indicator progresses at a second rate that is different from the first rate relative to the first difference in the measured compression depth.

2. The device of claim 1 , further comprising:

a mechanism for measuring the compression depth, and for providing the representation of the instantaneous value of a measured compression depth, and

in which the display is coupled to a host device.

3. The device of claim 1 , further comprising:

a host device capable of one of measuring a parameter of the patient and providing a therapy to the patient, and

in which

the display is coupled to the host device, and

the host device receives the representation of the instantaneous value from a mechanism for measuring the compression depth that is distinct from the host device.

4. The device of claim 1 , in which

the first rate is a rate that is approximately linear in a vicinity of the first point.

5. The device of claim 1 , in which

the indicator is a line segment having a main direction substantially perpendicular to a main direction of the indicator range, and progressing along the indicator range comprises moving the line segment along the indicator range.

6. The device of claim 1 , in which

the indicator is a progress bar, and progressing along the indicator range comprises extending a length of the progress bar.

7. The device of claim 1 , in which

the indicator is a series of objects, and progressing along the indicator range comprises adding more objects to the series of objects.

8. The device of claim 1 , in which

the indicator is a series of lights, and progressing along the indicator range comprises illuminating more of the series of lights.

9. The device of claim 1 , in which

the first rate is non-zero.

10. The device of claim 1 , in which

the second rate is higher than the first rate.

11. The device of claim 1 , in which

the second rate is lower than the first rate.

12. The device of claim 1 , in which

when the measured compression depth is passing a third point of the compression depth range that is distinct from the first point and the second point, the indicator progresses at a third rate that is different from the first rate and the second rate relative to the first difference in the measured compression depth.

13. The device of claim 12 , in which

the third rate is non-zero.

14. The device of claim 12 , in which

the third rate is one of higher and lower than the second rate and the first rate, and the third point is between the second point and the first point.

15. The device of claim 1 , in which

the indicator range includes a target compression minimum depth indication and a target compression maximum depth indication.

16. The device of claim 1 , in which

when the measured compression depth is passing the first point in the range, the indicator is illustrated in a first view of the display, and

when the measured compression depth is passing the second point in the range, the indicator is illustrated in a second view of the display.

17. The device of claim 16 , in which

the first view and the second view have different scales of depth compression measurement.

18. A display for a medical device for giving visual feedback of an instantaneous value of a measured compression depth to a rescuer who is providing Cardio Pulmonary Resuscitation (CPR) compressions to a patient, the display comprising:

an indicator range that corresponds at least in part to a compression depth range of some of the measured compression depths;

an indicator represented as traveling along the indicator range as the depth changes within the compression depth range to indicate the instantaneous value of the measured compression depth in relation to the indicator range; and

for particular depths along a linear scale of measurements in the compression depth range, a set of corresponding depth marks on the display at non-linear scale intervals along the indicator range.

19. The device of claim 18 , in which a depth mark corresponding to a compression depth of zero is on the display as a target recoil depth mark.

20. The device of claim 19 , in which depth marks corresponding to compression depths of 5 cm and 6 cm are on the display, and in which a distance along the indicator range between the target recoil depth mark and the depth mark corresponding to 5 cm is approximately the same as a distance between the depth mark corresponding to 5 cm and the depth mark corresponding to 6 cm.