Delirium detection system and method

Patent metadata

Field	Value
Publication number	US-2016354023-A1
Application number	US-201514730262-A
Country	US
Kind code	A1
Filing date	Jun 4, 2015
Priority date	Jun 17, 2014
Publication date	Dec 8, 2016
Grant date	—

Abstract

A delirium detection system for automatic, unobtrusive and reliable detection of delirium of a person comprises a processor and a computer-readable storage medium, wherein the computer-readable storage medium contains instructions for execution by the processor. The instructions cause the processor to perform the steps of controlling a stimulus unit to output a stimulus for stimulating the person, receiving and evaluating one or more reaction signals captured by a reaction unit and reflecting the person's reaction to a stimulus, and determining a delirium score from said evaluation of one or more reaction signals.

First claim

1 . A delirium detection system for detecting delirium of a person, the system comprising a processor and a computer-readable storage medium, wherein the computer-readable storage medium contains instructions for execution by the processor, wherein the instructions cause the processor to perform the steps of:
controlling a stimulus unit to output a stimulus for stimulating the person, receiving and evaluating one or more reaction signals captured by a reaction unit and reflecting the person's reaction to a stimulus, and determining a delirium score from said evaluation of one or more reaction signals.

2 . The system as claimed in claim 1 , wherein the instructions further cause the processor to control a visual and/or audio stimulus unit to generate and output a visual and/or audio stimulus.

3 . The system as claimed in claim 1 , wherein the instructions further cause the processor to receive and evaluate visual, audio and/or vital sign reaction signals captured by corresponding reaction units.

4 . The system as claimed in claim 1 , wherein the instructions further cause the processor to output a notification if the delirium score indicates or suggests delirium of the person.

5 . The system as claimed in claim 1 , wherein the instructions further cause the processor to control a visual stimulus unit to show pictures or to show objects at changing positions.

6 . The system as claimed in claim 1 , wherein the instructions further cause the processor to control an audio stimulus unit to issue sounds, read text and/or ask questions.

7 . The system as claimed in claim 1 , wherein the instructions further cause the processor to receive and evaluate visual reaction signals captured by a camera showing the person's reaction to a stimulus.

8 . The system as claimed in claim 7 , wherein the instructions further cause the processor to receive and evaluate gestures, mimics, eye blinking, eye movement, head movement, lip movement and/or movement of one or more other body parts.

9 . The system as claimed in claim 7 , wherein the instructions further cause the processor to control a stimulus unit to issue a moving object and/or a moving sound, to receive eye movement signals and/or head movement signal and to evaluate if the person loses track of the moving object and/or moving sound.

10 . The system as claimed in claim 7 , wherein the instructions further cause the processor to control a visual stimulus unit to show an oddball object within a series of non-oddball objects and to receive and evaluate a reaction signal reflecting the person's response to the showing of the oddball object.

11 . The system as claimed in claim 1 , wherein the instructions further cause the processor to receive and evaluate audible reaction signals captured by a microphone recording the person's audible reaction or answer to a stimulus.

12 . The system as claimed in claim 1 , wherein the instructions further cause the processor to receive and evaluate vital sign reaction signals captured by one or more vital sign measurement units recording one or more vital signs of the person in reaction to a stimulus.

13 . The system as claimed in claim 12 , wherein the instructions further cause the processor to receive and evaluate the person's EEG signal, ECG signal, heart rate signal, breathing rate signal, blood pressure signal, temperature signal, skin conductivity signal and/or body movement signal.

14 . The system as claimed in claim 1 , wherein the instructions further cause the processor to output a stimulus at regular or irregular intervals.

15 . The system as claimed in claim 1 , further comprising a visual stimulus unit for outputting a visual stimulus including a monitor, a TV set, a light apparatus and/or a beamer and/or an audio stimulus unit for outputting an audible stimulus including a loudspeaker.

16 . The system as claimed in claim 1 , further comprising by a reaction unit including a camera, a microphone and/or one or more sensors.

17 . The system as claimed in claim 1 , wherein said reaction unit includes one or more of an EEG sensor, an ECG sensor, a heart rate sensor, a breathing rate sensor, a blood pressure sensor, a temperature sensor, a skin conductivity sensor and/or a body movement sensor.

18 . A delirium detection method for detecting delirium of a person, the method comprising the steps of:
controlling a stimulus unit to output a stimulus for stimulating the person, receiving and evaluating one or more reaction signals captured by a reaction unit and reflecting the person's reaction to a stimulus, and determining a delirium score from said evaluation of one or more reaction signals.

19 . A non-transitory computer-readable recording medium that stores therein a computer program product, which, when executed by a processor, causes the method as claimed in claim 18 to be performed.

20 . A delirium detection system for detecting delirium of a person, the system comprising:
a controller configured to control a stimulus unit to output a stimulus for stimulating the person, an evaluator configured to receive and evaluate one or more reaction signals captured by a reaction unit and reflecting the person's reaction to a stimulus, and a scoring unit configured to determine a delirium score from said evaluation of one or more reaction signals.

Assignees

• Koninklijke Philips Nv

Inventors

• Falck Thomas
• Van Der Heide Esther Marjan
• Heinrich Adrienne
• Xie Yingrong

Classifications

• A61B7/00

  Instruments for auscultation · CPC title

• A61B5/04842

  Human Necessities · mapped topic

• A61B3/113

  for determining or recording eye movement · CPC title

• A61B5/04845

  Human Necessities · mapped topic

• A61B5/02055

  Simultaneously evaluating both cardiovascular condition and temperature · CPC title