MECHANICAL CPR DEVICE WITH AUTOMATIC SUCTION CUP ATTACHMENT

• US 20140180180A1
• Filed: 12/20/2013
• Published: 06/26/2014
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: Physio-Control Incorporated (Stryker Corporation)
• Original Assignee: Physio-Control Incorporated (Stryker Corporation)
• Inventors: Nilsson, Lars Anders, Hrdig, Bjarne Madsen
• Granted Patent: US 9,713,568 B2
• Time in Patent Office: Days
• US Class Current: 601/41
• CPC Class Codes: A61H 2031/001 fixed on the chest by suction
• CPC Class Codes: A61H 2201/1246 by piston-cylinder systems
• CPC Class Codes: A61H 2201/5007 computer controlled
• CPC Class Codes: A61H 2201/5061 Force sensors
• CPC Class Codes: A61H 2201/5064 Position sensors
• CPC Class Codes: A61H 31/005 with feedback for the user
• CPC Class Codes: A61H 31/006 Power driven

Abstract

A suction cup on the end of a piston of a mechanical CPR device can be automatically attached to a patient'"'"'s torso. The mechanical CPR device can extend the piston until a first position at which the suction cup comes into contact with the patient'"'"'s torso. The piston can be further extended to cause air to be forced out from an area between the suction cup and the patient'"'"'s torso until a first threshold is reached. The piston can be retracted until the suction cup is at the first position. The piston can be further retracted from the first position until a second threshold is exceeded. The piston can then be extended to a second point at which the second threshold is no longer exceeded.

Claims

1. A mechanical CPR device, comprising:

a piston having a suction cup attached an end thereof;

a driving component configured to extend the piston toward a patient'"'"'s torso and retract the piston away from the patient'"'"'s torso; and

a controller configured to determine a reference position by at least controlling the driving component to at least;

extend the piston until a first position at which the suction cup comes into contact with the patient'"'"'s torso,

further extend the piston to cause air to be forced out from an area between the suction cup and the patient'"'"'s torso until a first threshold is reached,

retract the piston until the suction cup is at the first position,

further retract the piston from the first position until a second threshold is exceeded, and

extend the piston to a second point at which the second threshold is no longer exceeded, the reference position being based at least in part on the second point;

wherein the controller is further configured to perform mechanical CPR by controlling the driving component to at least;

compress the patient'"'"'s torso by extending the piston from the reference position to a depth and retracting the piston from the depth to the reference position, and

actively decompress the patient'"'"'s torso by retracting the piston from the reference position to a height above the reference position.

2. The mechanical CPR device of claim 1, wherein the controller is configured to compress the patient'"'"'s torso and actively decompress the patient'"'"'s torso in a cycle based on a frequency.

3. The mechanical CPR device of claim 2, wherein the frequency is at least one of a predetermined frequency or a frequency entered by a user into the mechanical CPR device.

4. The mechanical CPR device of claim 2, wherein a duty cycle of the cycle is at least one of a predetermined duty cycle, or a duty cycle entered by a user into the mechanical CPR device.

5. The mechanical CPR device of claim 1, wherein the depth is at least one of a predetermined depth, a depth entered by a user into the mechanical CPR device, or a depth based on a force used to compress the patient'"'"'s torso.

6. The mechanical CPR device of claim 1, wherein the height is at least one of a predetermined height, a height entered by a user into the mechanical CPR device, or a height based on a force used to actively decompress the patient'"'"'s torso.

7. The mechanical CPR device of claim 1, wherein the first threshold is a force threshold, the mechanical CPR device further comprising:

a force sensor configured to sense the force applied by the piston to cause air to be forced out from an area between the suction cup and the patient'"'"'s torso.

8. The mechanical CPR device of claim 1, wherein the second threshold is a force threshold, the mechanical CPR device further comprising:

a spring activation sensor configured to signal when the piston has been extended to exceed the second threshold.

9. The mechanical CPR device of claim 8, wherein the spring activation sensor is further configured to stop signaling when the piston has been extended to the second point at which the second threshold is no longer exceeded.

10. The mechanical CPR device of claim 1, wherein one or both of the first and second thresholds is a pressure threshold, the mechanical CPR device further comprising:

a pressure sensor configured to sense pressure in the area between the suction cup and the patient'"'"'s torso.

11. The mechanical CPR device of claim 1, wherein the controller is configured to determine the reference position in response to the mechanical CPR device receiving a user input.

12. The mechanical CPR device of claim 1, wherein the controller is configured to determine the reference position a predetermined number of times before performing mechanical CPR.

13. A method of automatically attaching a suction cup to a patient'"'"'s torso, the suction cup located on an end of a piston of a mechanical CPR device, the method comprising:

extending, by the mechanical CPR device, the piston until a first position at which the suction cup comes into contact with the patient'"'"'s torso;

further extending, by the mechanical CPR device, the piston to cause air to be forced out from an area between the suction cup and the patient'"'"'s torso until a first threshold is reached;

retracting, by the mechanical CPR device, the piston until the suction cup is at the first position;

further retracting, by the mechanical CPR device, the piston from the first position until a second threshold is exceeded; and

extending, by the mechanical CPR device, the piston to a second point at which the second threshold is no longer exceeded, wherein a reference position is based at least in part on the second point.

14. The method of claim 13, wherein each of the first and second thresholds is at least one of a force threshold, a distance threshold, or a pressure threshold.

15. The method of claim 13, wherein the mechanical CPR device comprises a spring activation sensor configured to signal when the piston has been extract to exceed the second threshold.

16. The method of claim 15, wherein the spring activation sensor is further configured to stop signaling when the piston has been extended to the second point at which the second threshold is no longer exceeded.

17. A method of performing mechanical CPR, the method comprising:

automatically attaching, by a mechanical CPR device, a suction cup of the mechanical CPR device to a patient'"'"'s torso, the suction cup located on an end of a piston of the mechanical CPR device;

setting in, by the mechanical CPR device, a reference position of the suction cup;

extending, by the mechanical CPR device, the piston from the reference position to a particular depth below the reference position;

retracting, by the mechanical CPR device, the piston from the particular depth to a particular height above the reference position; and

extending, by the mechanical CPR device, the piston from the particular height to the reference position.

18. The method of claim 17, wherein extending the piston from the reference position to the particular depth and retracting the piston from the particular depth to the reference position causes compression of the patient'"'"'s torso, and wherein retracting the piston from the reference position to the particular height causes active decompression of the patient'"'"'s torso.

19. The method of claim 18, further comprising:

performing the compression of the patient'"'"'s torso and the active decompression of the patient'"'"'s torso a plurality of times in a cycle.

20. The method of claim 19, wherein the cycle is performed based on a frequency, and wherein the frequency is at least one of a predetermined frequency or a frequency entered by a user into the mechanical CPR device.

21. The method of claim 17, wherein the particular depth is at least one of a predetermined depth, a depth entered by a user into the mechanical CPR device, or a depth based on a force used to compress the patient'"'"'s torso.

22. The method of claim 17, wherein the particular height is at least one of a predetermined height, a height entered by a user into the mechanical CPR device, or a height based on a force used to actively decompress the patient'"'"'s torso.

23. The method of claim 17, wherein setting in, by the mechanical CPR device, the reference position of the suction cup comprises automatically determining, by the mechanical CPR device, the reference position of the suction cup.

24. A mechanical CPR device, comprising:

a piston having a suction cup attached an end thereof;

a driving component configured to extend the piston toward a patient'"'"'s torso and retract the piston away from the patient'"'"'s torso; and

a controller configured to at least;

position the piston at a reference point with the suction cup attached to the patient'"'"'s torso,

retract the piston from the reference position to a height above the reference point, and

extend the piston from the height above the reference point to the reference position.

25. The mechanical CPR device of claim 24, wherein the controller is configured to at least:

extend the piston from the reference position to a depth below the reference position; and

retract the piston from the depth below the reference position to the reference position.

26. The mechanical CPR device of claim 24, wherein the controller is configured to at least:

extend the piston until a first position at which the suction cup comes into contact with the patient'"'"'s torso;

further extend the piston to cause air to be forced out from an area between the suction cup and the patient'"'"'s torso until a first threshold is reached;

retract the piston until the suction cup is at the first position;

further retract the piston from the first position until a second threshold is exceeded;

extend the piston to a second point at which the second threshold is no longer exceeded; and

determine the reference position based at least in part on the second point.