CPR chest compression machine stopping to detect patient recovery
View Patent ↗Embodiments of the present concept are directed to CPR chest compression machines that include a sensor to detect a parameter about a patient, such as an indication of patient recovery, and include a processor that determines whether to cease series of successive compressions on the patient in response to the detected parameter.
1. A system for performing Cardio-Pulmonary Resuscitation (“CPR”) chest compressions on a patient, the system comprising:
a CPR compression machine, including:
a compression structure configured to deliver successive compressions to a chest of the patient;
a first sensor adapted to detect a first parameter about the patient and output a first sensor signal indicative of a dynamic value of the first parameter; and
a processor configured to perform operations including:
controlling the compression structure to deliver a first series of successive compressions,
determining from the dynamic value whether a stoppage criteria is met,
after the stoppage criteria is met, controlling the compression structure to stop delivering the first series of successive compressions to detect a static value of the first parameter by the first sensor while the patient is not receiving chest compressions,
determining from a constituent value whether a restart condition is met, and
controlling the compression structure to start delivering a second series of successive compressions when the restart condition is met; and
a ventilation machine coupled to the CPR compression machine configured to ventilate the patient.
2. The system of claim 1 , in which
the restart condition is met also when a data measurement corresponding to the static value has been completed.
3. The system of claim 1 , in which
the processor is coupled to receive the first sensor signal,
the constituent value is a digital rendering of the static value that has been decoded from the first sensor signal, and
the restart condition determination is performed when the constituent value is generated.
4. The system of claim 1 , in which
the processor is coupled to receive the first sensor signal,
the constituent value is a digital rendering of the static value that has been decoded from the first sensor signal, and
the restart condition determination is performed when a computation from the constituent value is indicated as having been completed.
5. The system of claim 1 , in which the restart condition is met when a determination has been made automatically from the static value to perform compressions.
6. The system of claim 1 , in which the restart condition determination comprises a comparison of the static value and the dynamic value.
7. The system of claim 1 , in which the stoppage criteria includes stopping the first series of compressions for ventilation from the ventilation machine.
8. The system of claim 1 , the CPR compression machine further comprising a user interface adapted to output an alert message to a user when the restart condition is not met.
9. The system of claim 1 , in which the processor causes an alert message to be communicated to a device other than the machine when the restart condition is not met.
10. The system of claim 1 , in which the processor is further adapted to:
determine whether a stopping criterion is met,
then control the compression structure to stop delivering the second series of successive compressions when the stopping criterion is met for the first parameter to be detected again by the first sensor while the patient is not receiving chest compressions, and
then control the compression structure to start delivering a third series of successive compressions.
11. The system of claim 10 , in which the stopping criterion determination is made from the static value.
12. The system of claim 10 , in which the second series is stopped at a second time determined from the static value.
13. The system of claim 10 , in which the stopping criterion is met when the detected static value exceeds a threshold.
14. The system of claim 13 , in which
the first parameter includes arterial systolic blood pressure, and
the threshold is about 80 millimeters of mercury.
15. The system of claim 13 , in which
the first parameter includes blood oxygen saturation, and
the threshold is about 90 percent.
16. The system of claim 13 , in which
the first parameter includes end tidal carbon dioxide, and
the threshold about 30 millimeters of mercury.
17. The system of claim 13 , in which
the first parameter includes to blood velocity, and
the threshold is zero ml/s.
18. The system of claim 13 , in which
the first parameter includes a patient's ECG, and
the threshold is an aspect of measured QRS complexes.
19. The system of claim 13 , in which the CPR compression machine further comprises a user interface adapted to output an alert message to a user when the first parameter exceeds the threshold.
20. The system of claim 1 , in which the CPR compression machine further comprises
a second sensor adapted to detect a dynamic value of a second parameter different from the first parameter, the dynamic value detected about the patient while the patient is receiving the first series of chest compressions, and
the first series of chest compressions is stopped at a first time determined from the dynamic value.
21. The system of claim 20 , in which the dynamic value is received automatically from the second sensor.
22. The system of claim 20 , in which the dynamic value is entered via an interface by a human rescuer.
23. The system of claim 20 , in which the machine stops the second series when the dynamic value exceeds a threshold.
24. The system of claim 23 , in which
the second parameter includes arterial systolic blood pressure, and
the threshold is about 80 millimeters of mercury.
25. The system of claim 23 , in which
the second parameter includes blood oxygen saturation, and
the threshold is about 90 percent.
26. The system of claim 23 , in which
the second parameter includes end tidal carbon dioxide, and
the threshold about 30 millimeters of mercury.
27. The system of claim 23 , in which
the second parameter includes to blood velocity, and
the threshold is zero ml/s.
28. The system of claim 23 , in which
the second parameter includes a patient's ECG, and
the threshold is an included aspect of measured QRS complexes.
29. The system of claim 23 , further comprising:
a user interface adapted to output an alert message to a user when the dynamic value exceeds the threshold.
30. The system of claim 1 , further comprising generation means for automatically generating the constituent value.
31. The system of claim 1 , the processor further configured to control the compression structure to deliver the second series of successive compressions for a length of time based on the first parameter.
32. A method for a Cardio-Pulmonary Resuscitation (“CPR”) compression machine having a mechanism configured to deliver successive compressions to a chest of a patient, the method comprising:
controlling the mechanism to deliver a first series of successive compressions to the chest of the patient;
detecting a first parameter about the patient and outputting a first sensor signal indicative of a dynamic value of the first parameter,
determining from the dynamic value whether stoppage criteria is met,
after the stoppage criteria is met, controlling the mechanism to end delivery of the first series of successive compressions and detecting a static value of the first parameter while the patient is not receiving chest compressions, and outputting a second sensor signal indicative of the static value of the first parameter;
automatically generating a constituent value;
determining from the constituent value whether a restart condition has been met;
controlling the mechanism to deliver a second series of successive compressions when the restart condition is met; and
ventilating the patient after the stoppage criteria is met and prior to the restart condition being met.
33. An article comprising a storage medium having instructions stored thereon that when executed by at least one device result in:
controlling a mechanism to deliver a first series of successive compressions to a chest of a patient;
detecting a first parameter about the patient and outputting a first sensor signal indicative of a dynamic value of the first parameter;
determining from the dynamic value whether stoppage criteria is met;
after the stoppage criteria is met, controlling the mechanism to end delivery of the first series of successive compressions and detecting a static value of the first parameter while the patient is not receiving chest compressions, and outputting a second sensor signal indicative of the static value of the first parameter;
automatically generating a constituent value;
determining from the constituent value whether a restart condition has been met;
controlling the mechanism to deliver a second series of successive compressions when the restart condition is met, and
ventilating the patient after the stoppage criteria is met and prior to the restart condition being met.