Medical alarming system

• US 5,696,492 A
• Filed: 10/11/1996
• Issued: 12/09/1997
• Est. Priority Date: 10/13/1995
• Status: Expired due to Term

• Current Assignee: Nihon Kohden Corporation
• Original Assignee: Nihon Kohden Corporation
• Inventors: Ysuda, Hajime, Fukui, Yasuhiro, Sakamaki, Takanori
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): Huang, Sihong
• Application Number:
  US08/730,480
• Time in Patent Office: 424 Days
• Field of Search: 340/573, 340/522, 364/413.02, 364/413.03, 128/903, 128/906
• US Class Current: 340/573.1
• CPC Class Codes: A61B 5/0215 by means inserted into the body catheters A61M25/00
• CPC Class Codes: A61B 5/7246 using correlation, e.g. template matching or determination of similarity
• 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 medical alarming system for delivering an alarm in response to any abnormal change arising during the monitoring of a patient'"'"'s physiological signals, and which causes less stress in the patient from less disturbance to his or her sleep. The system a) evaluates whether a change in the output from a physiological sensor is normal or not, thereby determining the occurrence of abnormal change; b) detects the image of the patient'"'"'s bedside; c) evaluates whether the current image of the bedside agrees with a predetermined criteria; d) determines the appropriate type of alarm to be actuated; and e) delivers the determined alarm.

Claims

1. A medical alarming system for informing an abnormal event when an abnormality occurs in the output of a physiological signal detecting means for measuring the physiological signal of a patient in a bed, comprising:

a first evaluating means for evaluating whether the current output from the physiological signal detecting means is normal or not;

an image detecting means for detecting the image of the bedside of the patient;

a second evaluating means for evaluating whether the current image of the bedside detected by the image detecting means agrees with a predetermined criterion or not;

an alarm type determining means for determining, for the case judged to be abnormal by the first evaluating means, the alarm type according to the judgement given by the second evaluating means for the same case; and

an alarm delivering means for delivering the type of alarm that has been determined by the alarm type determining means;

and wherein the first evaluating means includes at least one sensor, the first evaluating means, when it evaluates an event as abnormal, evaluates further whether the abnormality comes from the sensor or from the patient; and

the alarm type determining means determines, for the case judged to be abnormal by the first evaluating means, the alarm type according to the judgement of the type of the abnormality given by the first evaluating means and to the judgement given by the second evaluating means.

2. The medical alarming system as described in claim 1 wherein the second evaluating means evaluates whether the current image of the bedside agrees with a predetermined criterion according to the presence/absence of a human image.

3. A medical alarming system for informing an abnormal event when an abnormality occurs in the output of a physiological signal detecting means for measuring the physiological signal of a patient in a bed, comprising:

a first evaluating means for evaluating whether the current output from the physiological signal detecting means is normal or not;

an image detecting means for detecting the image of the bedside of the patient;

a second evaluating means for evaluating whether the current image of the bedside detected by the image detecting means agrees with a predetermined criterion or not;

an alarm type determining means for determining, for the case judged to be abnormal by the first evaluating means, the alarm type according to the judgement given by the second evaluating means for the same case; and

an alarm delivering means for delivering the type of alarm that has been determined by the alarm type determining means;

the alarm type determining means determines, for the case judged to be abnormal by the first evaluating means, the alarm type by further evaluating the seriousness of the alarm according to the judgement given by the second evaluating means; and

the alarm delivering means delivers such type of alarm that the less the seriousness is evaluated, the less the stress is given to the patient.

4. A medical alarming system for informing an abnormal event when an abnormality occurs in the output of a physiological signal detecting means for measuring the physiological signal of a patient in a bed, comprising:

a first evaluating means for evaluating whether the current output from the physiological signal detecting means is normal or not;

an image detecting means for detecting the image of the bedside of the patient;

a second evaluating means for valuating whether the current image of the bedside detected by the image detecting means agrees with a predetermined criterion or not;

an alarm type determining means for determining, for the case judged to be abnormal by the first;

evaluating means, the alarm type according to the judgement given by the second evaluating means for same case; and

an alarm delivering means for delivering the type of alarm that has been determined by the alarm type determining means;

and wherein the first evaluating means includes at least one sensor, the first evaluating means, when it evaluates an event as abnormal, evaluates further whether the abnormality comes from the sensor or from the patient;

the second evaluating means evaluates whether the current image of the bedside agrees with a predetermined criterion according to the presence/absence of a human image;

the alarm type determining means determines, for the case judged to be abnormal by the first evaluating means, the alarm type according to the judgement of the type of the abnormality given by the first evaluating means and to the judgement given by the second evaluating means;

the alarm delivering means delivers such type of alarm that the less the seriousness is evaluated, the less the stress is given to the patient; and

further

the alarm type determining means evaluates as most serious the situation where no human image is present, and the abnormality comes from the sensor,

as moderately serious the situation where no human image is present, and the abnormality comes from the patient, and

as less serious the situation where a human image is present and the abnormality comes from the sensor and, in addition, the situation where a human image is present and the abnormality comes from the patient.