ALARM GENERATION METHOD AND ARTEFACT REJECTION FOR PATIENT MONITOR

• US 20160220197A1
• Filed: 12/07/2015
• Published: 08/04/2016
• Est. Priority Date: 01/29/2015
• Status: Abandoned Application

• Current Assignee: Borje Rantala
• Original Assignee: Borje Rantala
• Inventors: Rantala, Brje
• Application Number:
  US14/960,468
• Publication Number:
  US 20160220197A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/01 Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue clinical contact thermometers G01K13/20
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/0816 Measuring devices for examining respiratory frequency measuring frequency of electric signals G01R23/00
• CPC Class Codes: A61B 5/0826 Detecting or evaluating apnoea events A61B5/4818 takes precedence
• CPC Class Codes: A61B 5/14542 for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/14546 for measuring analytes not otherwise provided for, e.g. ions, cytochromes
• CPC Class Codes: A61B 5/361 Detecting fibrillation
• CPC Class Codes: A61B 5/363 Detecting tachycardia or bradycardia
• CPC Class Codes: A61B 5/366 Detecting abnormal QRS complex, e.g. widening
• CPC Class Codes: A61B 5/369 Electroencephalography [EEG] devices for psychotechnics A61B5/16
• CPC Class Codes: A61B 5/4818 Sleep apnoea
• CPC Class Codes: A61B 5/746 Alarms related to a physiological condition, e.g. details of setting alarm thresholds or avoiding false alarms alarms per se G08B

Abstract

A method for managing alarms in a physiological monitor by identifying a clinical sequence of adverse effects and following the evolution of the sequence by alarm logic. By requiring the evolution to proceed as defined, false alarms from the individual parameters can be suppressed, resulting in a significant improvement in the specificity of the alarm, without sacrificing sensitivity.

Claims

1. A method for generating alarms in a physiological monitor comprising:

Monitoring 2 or more physiological parameters;

Defining a clinical sequence of patient adverse states leading to a final adverse patient state;

Assigning subalarm criteria to the adverse states in the clinical sequence;

Defining sequence logic for a combination of the subalarms, and

Generating a final alarm when the subalarms trigger according to the sequence logic.

2. The method according to claim 1, where the sequence logic includes one or more of the subalarm properties:

priority, duration, timing, sensor status.

3. The method according to claim 2, where the sequence logic requires each subalarm to persist for a predetermined duration in order for the next subalarm in the sequence to be activated.

4. The method according to claim 1, wherein the assigning subalarm criteria includes selecting alarm limits from parameter averages prior to one or more earlier subalarms.

5. The method according to claim 2, wherein the defining includes defining a formula for constructing the final alarm as a combination of the alarms in the individual patient adverse states sequential chain.

6. The method according to claims 1-5, wherein the parameters are Respiration (including motion), SpO2 and ECG, and the adverse states Apnea, Low SpO2 and ST segment deviation

7. The method according to claims 1-5, wherein the parameters are Respiration (including motion), SpO2 and ECG, and the adverse states Apnea, Low SpO2 and Severe arrhythmia.

8. The method according to claims 1-5, wherein the parameters are Anesthetic agent concentration, EEG depression and Severe arrhythmia.

9. The method according to claims 1-5, wherein the parameters are HighTemperature, LowBloodPressure and Sepsis.

10. The method according to claims 1-5, wherein the alarm is an event flagged in the patient record.

11. A method for managing alarms in a sleep apnea monitor comprising of:

Monitoring Respiration (including motion) and SpO2,

Defining the clinical sequence of Apnea and LowSpO2

Assigning subalarm criteria to the adverse states in the clinical sequence;

Generating a final alarm when the patient evolves from Apnea to LowSpO2.

12. A method according to claim 11 wherein the alarm criteria are more sensitive than for Apnea and SpO2 taken separately.

13. A method for managing alarms in a sleep apnea monitor comprising of:

Monitoring Respiration (including motion), SpO2 and ST segment deviation,

Defining the clinical sequence of Apnea, LowSpO2 and ST segment deviation

Assigning subalarm criteria to the adverse states in the clinical sequence;

Generating a final alarm when the patient evolves from Apnea to LowSpO2 and to ST segment deviation.

14. A method according to claim 13 wherein the alarm criteria are more sensitive than for Apnea, SpO2 and ST segment deviation taken separately.