External defibrillator instruction system and method

• US 6,694,187 B1
• Filed: 06/23/2000
• Issued: 02/17/2004
• Est. Priority Date: 06/23/2000
• Status: Expired due to Fees

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Freeman, Curtis W.
• Primary Examiner(s): EVANISKO, GEORGE ROBERT
• Application Number:
  US09/603,270
• Time in Patent Office: 1,334 Days
• Field of Search: 607/7, 607/115, 607/145, 607/119, 607/2-5, 607/9, 607/14, 128/906, 128/920, 128/921-923, 600/508, 600/515-518
• US Class Current: 607/5
• CPC Class Codes: A61N 1/3904 External heart defibrillators [EHD]
• CPC Class Codes: A61N 1/39044 in combination with cardiopulmonary resuscitation [CPR] therapy

Abstract

The present disclosure relates to a system and method for instructing a user as to how to treat a patient with a defibrillator. In use, electrocardiogram data of the patient is analyzed to determine whether a shockable condition exists. Normal heart function and asystole are distinguished where no shock is advisable, and the user is advised that the patient is in asystole where an asystole condition is detected. Through this method, the attending technician is notified not only that a shock is not advised, but whether the shock is not advised due to an asystole condition.

Claims

1. A method for instructing a user as to bow to treat a patient with a defibrillator, comprising:

analyzing electrocardiogram data of the patient to determine whether a shockable condition exists;

based on the analyzing step, when a non-shockable condition exists, detecting whether the non-shockable condition is one of normal heart function and asystole;

communicating to the user that the patient is in asystole where an asystole condition is detected; and

communicating to the user that normal heart function of the patient has resumed where normal heart function is detected,

wherein when asystole is detected, determining whether the asystole qualifies as a prolonged asystole according to predetermined criteria, and communicating to the user that asystole endured by the patient comprises said prolonged asystole, and wherein the step of determining whether the asystole qualifies as a prolonged asystole comprises recording a duration of time from the onset of asystole.

2. The method of claim 1 wherein the predetermined time period for determining whether the asystole is a prolonged asystole is selected by the user.

3. The method of claim 1, further comprising instructing the user to administer cardio-pulmonary resuscitation (CPR) to the patient after it has been determined that asystole has been detected, and after a predetermined time period, communicating to the user that further administration of CPR is futile.

4. The method of claim 1, wherein the communicating to the user is visual via a display of the defibrillator.

5. The method of claim 4, wherein the communicating to the user via a display of the defibrillator comprises displaying the time elapsed since the onset of asystole.

6. The method of claim 1 wherein the communicating to the user is audible via a speaker of the defibrillator.

7. The method of claim 6, wherein the communicating to the user via a speaker of the defibrillator comprises audibly announcing the time elapsed since the onset of asystole.

8. An external defibrillator comprising:

electrocardiogram means for performing an electrocardiogram on a patient;

a first logic configured to analyze electrocardiogram data of the patient from said electrocardiogram means to determine whether a shockable condition exists;

a second logic configured to detect either of a normal heart function and an asystole and distinguish between the normal heart function and the asystole when the first logic has determined that no shockable condition exists;

a third logic configured to communicate to the user that the patient is in asystole when an asystole condition is detected by the second logic;

a fourth logic configured to communicate to the user that normal heart function of the patient has resumed where normal heart function is detected by the third logic; and

logic configured to determine, according to a predetermined criteria, and to communicate, to the user, that the patient has endured a prolonged asystole,

wherein the predetermined criteria for determining that the prolonged asystole has occurred includes a measurement of a duration of time from the onset of asystole by the second logic.

9. The defibrillator of claim 8, further comprising a display that is connected electrically to the fourth logic to display an indication to the user whether the patient has either an asystole condition or normal heart function.

10. The defibrillator of claim 8, further comprising a speaker that is connected electrically to the fourth logic to audibly alert the user whether the patient has either an asystole condition or normal heart function.

11. The defibrillator of claim 8, wherein the defibrillator comprises an automatic external defibrillator.

12. An external defibrillator comprising:

electrocardiogram means for performing an electrocardiogram on a patient;

means for analyzing electrocardiogram data of the patient from said electrocardiogram means to determine whether a shockable condition exists;

means for detecting a normal heart function and an asystole when no shock is advisable based on the determination of the means for analyzing;

means for communicating to the user that the means for detecting has detected that;

(a) the patient is in asystole when an asystole condition is detected; and

(b) the patient has resumed where normal heart function where normal heart function is detected; and

means for communicating to the user that the patient has endured a prolonged asystole according to a predetermined criteria,

wherein the prolonged asystole is determined from a duration of time from the onset of asystole detected by the means for detecting.

13. The defibrillator of claim 12, wherein the means for communicating comprises a display for displaying to the user whether the patient has one of an asystole condition and normal heart function.

14. The defibrillator of claim 12, wherein the communicating means further comprises means for audibly communicating to the user whether the patient has one of an asystole condition mid normal heart function.

15. The defibrillator of claim 12, wherein the defibrillator comprises an automatic external defibrillator.

16. A computer readable medium comprising:

a program for performing an electrocardiogram on a patient;

logic configured to analyze electrocardiogram data of the patient after the electrocardiogram program has begun to determine whether a shockable condition exists;

logic configured to detect a normal heart function and an asystole where no shock is advisable;

communication logic configured to communicate to the user that the patient;

(a) is in asystole when an asystole condition is detected; and

(b) normal heart function has resumed when such a condition is detected,

logic configured to communicate to the user that the asystole endured by the patient is identified as an prolonged asystole according to predetermined criteria,

wherein the predetermined criteria fir determining that the prolonged asystole has occurred is determined by a duration of time from the onset of the asystole.

17. The computer readable medium of claim 16, wherein the communication logic is configured to request a display to the user as to whether a shockable or nonshockable condition exists, and if the request is to display a non-shockable condition, said communication logic further includes an indication whether the non-shockable condition comprises one of a normal heart function and an asystole.

18. The computer readable medium of claim 16, wherein the communication logic is configured to request an audible communication to the user as to whether a shockable or nonshockable condition exists, and if the request is to communicate a non-shockable condition, said communication logic further includes an indication whether the non-shockable condition comprises one of a normal heart function and an asystole.