CPR chest compression machine adjusting motion-time profile in view of detected force

Patent metadata

Field	Value
Publication number	US-11723834-B2
Application number	US-202117238627-A
Country	US
Kind code	B2
Filing date	Apr 23, 2021
Priority date	Nov 17, 2014
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A CPR machine ( 100 ) is configured to perform, on a patient's ( 182 ) chest, compressions that alternate with releases. The CPR machine includes a compression mechanism ( 148 ), and a driver system ( 141 ) configured to drive the compression mechanism. A force sensing system ( 149 ) may sense a compression force, and the driving can be adjusted accordingly if there is a surprise. For instance, driving may have been automatic according to a motion-time profile, which is adjusted if the compression force is not as expected ( 850 ). An optional chest-lifting device ( 152 ) may lift the chest between the compressions, to assist actively the decompression of the chest. A lifting force may be sensed, and the motion-time profile can be adjusted if the compression force or the lifting force is not as expected.

First claim

What is claimed is:

1. A Cardio-Pulmonary Resuscitation (“CPR”) machine configured to perform chest compressions on a chest of a patient, the chest having a resting height relative to a reference level, the resting height measured when no chest compressions are being performed, the CPR machine comprising:
a compression mechanism;
a chest-lifting device configured to lift the chest; and
a driver system configured to drive the compression mechanism and the chest-lifting device according to a motion-time profile so as to cause the chest-lifting device to lift the chest a first distance from the resting height and the chest-lifting device to lift the chest a second distance from the resting height greater than the first distance after lifting the chest to the first distance.

2. The CPR machine of claim 1 , wherein the driver system is further configured to drive the compression mechanism and the chest-lifting device according to the motion-time profile so as to cause the chest-lifting device to lift the chest a third distance from the resting height greater than the second distance after lifting the chest the second distance.

3. The CPR machine of claim 2 , wherein the third distance is at least 5% greater than the second distance.

4. The CPR machine of claim 1 , wherein the second distance is at least 5% greater than the first distance.

5. The CPR machine of claim 1 , wherein the driver system is further configured to drive the compression mechanism and the chest-lifting device according to the motion-time profile so as to cause the compression mechanism to perform a first compression after the chest is lifted the first distance, and a second compression after the chest is lifted to the second distance.

6. The CPR machine of claim 5 , wherein the first compression has a first depth from the resting height and the second compression has a second depth from the resting height that is greater than the first depth.

7. The CPR machine of claim 1 , wherein the driver system is further configured to alternate driving the compression mechanism to perform compressions and the chest-lifting device to lift the chest.

8. The CPR machine of claim 1 , wherein the driver system is further configured to drive the compression mechanism and the chest-lifting device according to the motion-time profile so as to cause no compressions to be performed by the compression mechanism until after the chest-lifting device lifts the chest the second distance.

9. The CPR machine of claim 8 , wherein the driver system is further configured to drive the compression mechanism and the chest-lifting device according to the motion-time profile so as to cause the chest-lifting device to lift the chest a second time to the second distance after the compression mechanism performs a compression.

10. The CPR machine of claim 1 , wherein the driver system is further configured to drive the compression mechanism and the chest-lifting device according to the motion-time profile so as to cause the compression mechanism to perform a first compression to a first depth from the resting height and a second compression to a second depth from the resting height that is greater than the first depth before the chest-lifting device lifts the chest.

11. A method for a Cardio-Pulmonary Resuscitation (“CPR”) machine to perform chest compressions on a chest of a patient, the chest having a resting height relative to a reference level, the resting height measured when no chest compressions are being performed on the patient, the method comprising:
driving a chest-lifting device to lift the chest to a first distance from the resting height;
driving the chest-lifting device to lift the chest to a second distance from the resting height, after lifting the chest the first distance, the second distance greater than the first distance; and
driving a compression mechanism to perform one or more compressions on the chest.

12. The method of claim 11 , further comprising driving the chest-lifting device to lift the chest a third distance from the resting height greater than the second distance after lifting the chest the second distance.

13. The method of claim 12 , wherein the third distance is at least 5% greater than the second distance.

14. The method of claim 11 , wherein the second distance is at least 5% greater than the first distance.

15. The method of claim 11 , wherein driving the compression mechanism to perform one or more compressions includes driving the compression mechanism to perform a first compression after the chest is lifted the first distance and before the chest is lifted the second distance, and a second compression after the chest is lifted to the second distance.

16. The method of claim 15 , wherein the first compression has a first depth from the resting height and the second compression has a second depth from the resting height that is greater than the first depth.

17. The method of claim 11 , wherein driving the compression mechanism to perform the one or more compressions alternates with driving the chest-lifting device to lift the chest.

18. The method of claim 11 , wherein no compressions are performed by the compression mechanism until after the chest-lifting device lifts the chest the second distance.

19. The method of claim 18 , further comprising driving the chest-lifting device to lift the chest a second time to the second distance after the compression mechanism performs a compression.

20. The method of claim 11 , further comprising driving the compression mechanism to perform a first compression to a first depth from the resting height and a second compression to a second depth from the resting height that is greater than the first depth before the chest-lifting device lifts the chest.

Assignees

• Physio Control Inc

Inventors

• Nilsson Anders
• Lagerstrom Jonas
• Mellberg Bo
• Jeppsson Anders
• Ehrstedt Marcus
• Hardig Bjarne Madsen
• Arnwald Fredrik
• Von Schenck Erik
• Rasmusson Paul
• Lindroth Sara
• Chapman Fred
• Landon Ryan
• Smith Mitchell A
• Duke Steven B
• Szul Krystyna
• Kavounas Gregory T

Classifications

• A61H2201/0184

  by raising an alarm · CPC title

• A61H2031/002

  fixed on the chest by adhesives · CPC title

• A61H31/006 Primary

  Power driven · CPC title

• A61H31/007

  Manual driven · CPC title

• A61H2031/001

  fixed on the chest by suction · CPC title