IP Library › Granted Patent US 12,220,378
Granted Patent B2
US 12,220,378 · App. 18/144,266 · Granted Feb 11, 2025

Systems and methods to increase survival with favorable neurological function after cardiac arrest

Inventors: Keith G. Lurie (Minneapolis, MN); Anja Metzger (Stillwater, MN)
Assignee: ZOLL Medical Corporation
A61H31/007A61H31/004A61H31/005A61M16/0048A61M16/0084A61M16/10A61M16/208A61H2031/002A61H31/006A61H31/02A61H2201/0173A61H2201/018A61H2201/0184A61H2201/107A61H2201/5061A61H2201/5071A61H2201/5084A61H2205/084A61H2230/04A61H2230/065A61H2230/40A61H2230/65A61M2202/0208A61M2205/583
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Quick Facts
Patent No.
US 12,220,378
App. No.
18/144,266
Granted
Feb 11, 2025
Kind
B2
Abstract

A system includes a guidance device that provides feedback to a user to compress a patient's chest at a rate of between about 90 and 110 compressions per minute and at a depth of between about 4.5 centimeters to about 6 centimeters. The system includes a pressure regulation system having a pressure-responsive valve that is configured to be coupled to a patient's airway. The pressure-responsive valve is configured to remain closed during successive chest compressions in order to permit removal at least about 200 ml from the lungs in order to lower intracranial pressure to improve survival with favorable neurological function. The pressure-responsive valve is configured to remain closed until the negative pressure within the patient's airway reaches about −7 cm H 2 O, at which time the pressure-responsive valve is configured to open to provide respiratory gases to flow to the lungs through the pressure-responsive valve.

Claims (32)

1. A resuscitative system for treating a patient suffering from cardiac arrest, the system comprising:

a chest compression device configured to provide chest compression therapy to the patient; and

an impedance threshold device (ITD) configured to be coupled to the patient's airway during the chest compression therapy, the ITD comprising a pressure-responsive valve configured to:

open during application of a chest compression to the patient to permit gas flow through the pressure-responsive valve, and

close during chest wall recoil from the chest compression to restrict gas flow through the pressure-responsive valve.

2. The system of claim 1 , wherein the chest compression device comprises an automated chest compression device.

3. The system of claim 1 , wherein the chest compression device comprises an active compression-decompression device.

4. The system of claim 1 , wherein the chest compression device comprises a manual chest compression device.

5. The system of claim 1 , wherein the chest compression device comprises at least one of a load cell and an accelerometer.

6. The system of claim 1 , further comprising a guidance device configured to provide an indication of a target rate and/or depth at which chest compressions should be delivered.

7. The system of claim 6 , wherein the guidance device is configured to provide visual and/or audible feedback based on a comparison between the target rate and/or depth of chest compressions and a detected rate and/or depth of chest compressions.

8. The system of claim 1 , wherein the pressure-responsive valve is configured to open to permit gas flow through the pressure-responsive valve or close to restrict gas flow through the pressure-responsive valve when pressure within the patient's airway meets a threshold value.

9. The system of claim 1 , wherein the pressure-responsive valve is configured to open when pressure within the patient's airway meets the threshold value.

10. The system of claim 9 , wherein the threshold value falls within a range of about −7 cmH 2 O and −18 cmH 2 O.

11. The system of claim 1 , wherein the ITD is configured to provide an indication of when to deliver one or more positive pressure breaths to the patient's airway.

12. A resuscitative method of treating a patient suffering from cardiac arrest, the method comprising:

coupling a chest compression device to the patient's chest for providing chest compression therapy to the patient;

delivering chest compressions to the patient via the chest compression device; and

coupling an impedance threshold device (ITD) to the patient's airway for restricting airflow within the patient's chest during the chest compression therapy, the ITD comprising a pressure-responsive valve configured to:

permit gas flow through the pressure-responsive valve during a delivered chest compression to the patient, and

limit gas flow through the pressure-responsive valve during chest recoil from the delivered chest compression.

13. The method of claim 12 , wherein coupling the ITD to the patient's airway lowers intrathoracic pressure during the chest recoil from the delivered chest compression.

14. The method of claim 12 , comprising receiving, from the ITD, an indication to deliver one or more positive pressure breaths to the patient's airway.

15. The method of claim 12 , comprising delivering the one or more positive pressure breaths to the patient's airway in response to the received indication.

16. The method of claim 12 , wherein delivering the chest compressions to the patient comprises delivering automated compressions via the chest compression device.

17. The method of claim 12 , wherein delivering the chest compressions to the patient comprises delivering manual compressions via the chest compression device.

18. The method of claim 12 , comprising receiving, from a guidance device, an indication of a target rate and/or depth at which chest compressions should be delivered, and delivering the chest compressions at the target rate and/or depth.

19. The method of claim 18 , comprising receiving, from the guidance device, visual and/or audible feedback based on a comparison between the target rate and/or depth of chest compressions and a detected rate and/or depth of chest compressions, and adjusting a rate and/or depth at which the chest compressions are delivered.

20. The method of claim 12 , wherein delivering the chest compressions to the patient comprises delivering active compression-decompressions via the chest compression device.

21. The method of claim 20 , wherein delivering of the active compression-decompressions comprises delivering automated compressions via the chest compression device.

22. The method of claim 12 , wherein restricting airflow within the patient's chest during the chest compression therapy comprises the pressure-responsive valve opening to permit gas flow during the delivered chest compression.

23. The method of claim 12 , wherein restricting airflow within the patient's chest during the chest compression therapy comprises the pressure-responsive valve closing to restrict gas flow during chest recoil from the delivered chest compression.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 8, 2023
From: LURIE, KEITH G.; METZGER, ANJA
To: ADVANCED CIRCULATORY SYSTEMS, INC.
Reel/Frame 063562/0263 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 8, 2023
From: ADVANCED CIRCULATORY SYSTEMS, INC.
To: ZOLL MEDICAL CORPORATION
Reel/Frame 063562/0346 →
Continuity (8)
Continuation 17306325 · May 3, 2021
Continuation 16596097 · Oct 8, 2019
Continuation 15158738 · May 19, 2016
Continuation 14522402 · Oct 23, 2014
Continuation In Part 13411230 · Mar 2, 2012
Continuation In Part 11871879 · Oct 12, 2007
Provisional Application 60912891 · Apr 19, 2007
Related Publication 20240000657A1 · Jan 4, 2024
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