CPR Chest Compression Monitor With Reference Sensor

Patent metadata

Field	Value
Publication number	US-2016128633-A1
Application number	US-201514980901-A
Country	US
Kind code	A1
Filing date	Dec 28, 2015
Priority date	Oct 31, 2013
Publication date	May 12, 2016
Grant date	—

Abstract

Methods and devices for chest compression depth measurement for CPR.

First claim

We claim:

1 . A device for assisting resuscitation of a victim during CPR chest compressions comprising:
an anterior sensor disposed on an anterior segment, said anterior segment configured to be held adjacent to an anterior surface of the victim and said anterior sensor operable to produce a first signal corresponding to motion of the anterior surface during compressions; a posterior sensor disposed on a posterior segment, said posterior segment configured to be held adjacent to an posterior surface of the victim and said posterior sensor operable to produce a second signal corresponding to motion of the posterior surface during compressions; a control system operable to receive the first signal corresponding to motion of the anterior surface and the second signal corresponding to motion of the posterior surface and determine compression depth therefrom; and a feedback device configured to provide CPR advisory prompts to a rescuer based on the calculated compression depth, velocity or rate; wherein the anterior segment and posterior segment are configured to provide active decompression between CPR chest compressions.

2 . The device of claim 1 , wherein the anterior segment is joined to the posterior segment, such that the anterior segment and posterior segment are resiliently biased to open to a configuration larger than a thickness of the victim's chest.

3 . The device of claim 1 , wherein the anterior segment is joined to the posterior segment, such that the anterior segmetn and posterior segment are resiliently biased to open to a configureation larger than the circumference of the victim. ¶27.

4 . The device of claim 1 wherein:
the posterior sensor is operable to detect acceleration of the posterior surface, and the
the control system operable to determine depth, velocity or rate of CPR chest compressions from acceleration data obtained from the posterior sensor and data from the anterior sensor during CPR chest compressions.

5 . The device of claim 1 wherein:
the anterior sensor is operable to detect acceleration of the anterior surface, and the
the control system operable to determine depth, velocity or rate of CPR chest compressions from acceleration data obtained from the anterior sensor and data from the posterior sensor during CPR chest compressions.

6 . The device of claim 1 wherein:
the posterior sensor is operable to detect velocity of the posterior surface, and the
the control system operable to determine depth, velocity or rate of CPR chest compressions from velocity data obtained from the posterior sensor and data from the anterior sensor during CPR chest compressions.

7 . The device of claim 1 wherein:
the anterior sensor is operable to detect velocity of the anterior surface, and the
the control system operable to determine depth, velocity or rate of CPR chest compressions from velocity data obtained from the anterior sensor and data from the posterior sensor during CPR chest compressions.

8 . The device of claim 1 , wherein the control system is further operable to compare the measured depth of compression to a desired depth of compression and report to a CPR provider whether the achieved depth of compression meets or fails to meet the desired depth.

9 . The device of claim 1 wherein
the control system is operable to determine the size of the cardiac arrest victim based on the distance between the anterior segment of the frame and the chest wall and provide feedback regarding the performance of chest compressions based on the determined size of the cardiac arrest victim.

10 . The device of claim 1 wherein:
the anterior segment is configured to adhere to the anterior surface of the victim.

11 . The device of claim 1 wherein:
one of the posterior sensor and the anterior sensor is operable to detect a magnetic field and produce a signal corresponding to motion through a magnetic field; and
the other of the posterior and the anterior sensor is operable to sense the magnetic field; and
the control system operable to determine depth, velocity or rate of CPR chest compressions from the signal corresponding to motion through the magnetic field during CPR chest compressions.

12 . A method of administering CPR chest compressions on a cardiac arrest victim, said cardiac arrest victim characterized by a thorax and an anterior chest wall, said method comprising the steps of:
disposing a frame sized and dimensioned to fit at least partially around the thorax of the cardiac arrest victim, said frame having an anterior segment and a posterior segment, an anterior sensor disposed in or on the anterior segment of the frame, said anterior sensor capable of producing a signal corresponding to motion of the chest wall during compressions; a posterior sensor disposed in or on the posterior segment of the frame, said anterior sensor capable of producing a signal corresponding to motion of the thorax during compressions; performing CPR compressions on the cardiac arrest victim; operating a control system to receive the signal corresponding to motion of the chest wall and the signal corresponding to motion of the thorax and determine the depth of chest compressions therefrom, and provide audio or visual feedback to a CPR provider.

13 . The method of claim 12 further comprising the step of:
operating the control system to provide prompts to a CPR provider regarding the depth of compression.

14 . The method of claim 12 further comprising the step of:
operating the control system to compare the determined depth of compression to a desired depth of compression and report to a CPR provider whether the determined depth of compression meets or fails to meet the desired depth.

15 . The method of claim 12 further comprising the step of:
bringing the anterior segment and posterior segment into contact with the thorax, and providing input to the control system that the anterior segment and posterior segment are in contact with the thorax.

16 . The method of claim 12 , wherein the step of performing CPR compressions further comprises the steps of:
trapping the anterior sensor between the CPR provider's hands and the victim's chest wall, and performing CPR compressions with the anterior sensor disposed between the CPR provider's hands and the victim's chest wall.

17 . The method of claim 12 , wherein the step of performing CPR compressions further comprises the steps of:
grasping the cardiac arrest victim's thorax with both hands of the CPR provider, with the CPR provider's thumbs over the sternum and the CRP provider's fingers extending around the thorax of the victim, trapping the first sensor between the CPR provider's thumbs and the victim's chest wall, and trapping the second sensor between the CPR provider's fingers and the victim's spine, and performing CPR compressions with a two-thumbs technique.

18 . The method of claim 12 , further comprising the step of:
adhering the frame to the cardiac arrest victim's thorax, and allowing the frame to expand between compressions to provide active decompression of the thorax.

19 . A method of performing CPR compressions, including active compression/decompression, said method comprising:
providing a frame sized and dimensioned to fit at least partially around the thorax of the cardiac arrest victim, said frame having an anterior segment and a posterior segment, wherein at least a portion of the anterior segment is adhesive; installing the frame about the thorax of a cardiac arrest victim such that the adhesive secures

Assignees

• Zoll Medical Corp

Inventors

• Silver Annemarie E
• Herken Ulrich R

Classifications

• A61B5/1107

  Measuring contraction of parts of the body, e.g. organ or muscle · CPC title

• A61B5/0053

  by applying pressure, e.g. compression, indentation, palpation, grasping, gauging · CPC title

• A61H2201/5084

  Acceleration sensors · CPC title

• A61B5/1135

  by monitoring thoracic expansion · CPC title

• A61B5/4848

  Monitoring or testing the effects of treatment, e.g. of medication · CPC title