Deciding on patient electric shock therapy

• US 9,539,434 B2
• Filed: 10/02/2009
• Issued: 01/10/2017
• Est. Priority Date: 10/02/2009
• Status: Active Grant

• Current Assignee: Physio-Control Incorporated (Stryker Corporation)
• Original Assignee: Physio-Control Incorporated (Stryker Corporation)
• Inventors: Sullivan, Joseph L.
• Primary Examiner(s): Koharski, Christopher D
• Assistant Examiner(s): MAHMOOD, NADIA AHMAD
• Application Number:
  US12/572,691
• Publication Number:
  US 20110082510A1
• Time in Patent Office: 2,657 Days
• Field of Search: 607/5, 607/7
• US Class Current: 1/1
• CPC Class Codes: A61N 1/3925 Monitoring; Protecting
• CPC Class Codes: A61N 1/3943 for threshold determination
• CPC Class Codes: A61N 1/3987 characterised by the timing or triggering of the shock

Abstract

Systems, devices, software and methods are provided, for making a decision as to whether to administer an electric shock to a patient. The decision can be made differently, depending on whether the patient has already been shocked or not.

Claims

1. A defibrillator, comprising:

an energy storage module configured to store an electrical charge;

a defibrillation port configured to provide the stored electrical charge to electrodes for delivery to a person; and

a processor configured to;

receive latter data collected from a patient during a session, the latter data being ECG data that is collected while the patient has been receiving chest compressions; and

decide from the latter data whether a latter electric shock should be administered or not to the patient, the decision being according to a first decision manner if no early electric shock has been administered to the patient during the session prior to when the latter data was collected, and according to a second decision manner different from the first decision manner otherwise, in which

a scoring parameter is computed from the latter data by an algorithm,

deciding according to the first decision manner includes deciding that the latter shock should be administered if the scoring parameter meets a first condition, but should not be administered otherwise, the first condition being that the scoring parameter is larger than a first shocking threshold, and

deciding according to the second decision manner includes deciding that the latter shock should be administered if the scoring parameter meets a second condition but should not be administered otherwise, the second condition being different from the first condition, the second condition being that the scoring parameter is larger than a second shocking threshold different from the first shocking threshold, and further in which

a confidence score is computed,

a confidence condition is not met if the confidence score is less than a confidence threshold,

the confidence threshold is different for the first decision manner than the second decision manner, and

when it is decided that the latter electric shock should not be administered, a prompt is caused to be issued for pausing the chest compressions if the confidence condition is not met.

2. The defibrillator of claim 1, in which the processor is further configured to:

receive early data collected from the patient during the session but before the latter data was collected; and

decide from the early data whether the early electric shock should be administered or not to the patient.

3. The defibrillator of claim 2, in which the processor is further configured to:

if it is decided that the early electric shock should be administered, cause the early electric shock to be administered.

4. The defibrillator of claim 2, in which

it is decided whether the early electric shock should be administered or not according to the first decision manner.

5. The defibrillator of claim 2, in which

it is decided whether the early electric shock should be administered or not according to an early decision manner that is different from the first decision manner.

6. The defibrillator of claim 1, in which the processor is further configured to:

if it is decided that the latter electric shock should be administered, cause the latter electric shock to be administered.

7. The defibrillator of claim 6, in which the processor is further configured to:

receive latest data collected from the patient after the latter electric shock has been administered; and

decide from the latest data whether a latest electric shock should be administered or not to the patient, the decision being according to a third decision manner different from the second decision manner.

8. The defibrillator of claim 1, in which

the decision according to the first decision manner includes using a different algorithm than the second decision manner.

9. The defibrillator of claim 1, in which

an artifact caused by the chest compressions is further removed from the latter data.

10. The defibrillator of claim 9, in which

the artifact is collected independently from the ECG data.

11. The defibrillator of claim 9, in which

the artifact is derived from the ECG data.