Living body light measuring device

• US 20060241361A1
• Filed: 02/07/2006
• Published: 10/26/2006
• Est. Priority Date: 04/22/2005
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Obata, Akiko, Maki, Atsushi, Morimoto, Kanehisa
• Granted Patent: US 7,349,727 B2
• Time in Patent Office: Days
• US Class Current: 600/310
• CPC Class Codes: A61B 5/14553 specially adapted for cerebral tissue
• CPC Class Codes: A61B 5/7264 Classification of physiological signals or data, e.g. using neural networks, statistical classifiers, expert systems or fuzzy systems neural networks per se G06N3/00; expert systems per se G06N5/00

Abstract

There is provided a living body light measuring device capable of monitoring a time curve of a blood substance concentration as time curves of parameters of a signal waveform and judging or analyzing characteristic traits of a subject relevant to the parameters of the signal waveform, wherein a signal processor extracts parameters such as a peak value and latency from a hemoglobin signal waveform measured before and after substance intake of a testee, and generates and displays a time curve graph having a parameter and time respectively as its ordinate and abscissa. Influence of an intake substance upon blood component concentrations and blood flow can be monitored by monitoring the time curves of parameters of the signal waveform. A category processor classifies measurement data into categories, analyzes time curves of a plurality of parameters every category, and displays a result on a result viewer.

Claims

1. A living body light measuring device comprising:

light measuring means for applying light to a subject and receiving light reflected or transmitted by a head of the subject;

signal processing means for drawing a change of a blood substance when a trial is given to the subject a plurality of times, as a signal waveform on the basis of a measurement signal received by said light measuring means; and

result viewer means for displaying a result of processing conducted by said signal processing means,

wherein said signal processing means extracts at least one feature from each of a plurality of signal waveforms measured at predetermined time intervals, and causes said result viewer means to display a time curve of the feature.

2. A living body light measuring device according to claim 1, wherein the feature extracted by said signal processing means comprises a peak value of the signal waveform.

3. A living body light measuring device according to claim 1, wherein the feature extracted by said signal processing means comprises a time period (latency) between start time of the trial and time when the signal waveform arrives at the peak value.

4. A living body light measuring device according to claim 2, wherein the feature extracted by said signal processing means comprises a time period (latency) between start time of the trial and time when the signal waveform arrives at the peak value.

5. A living body light measuring device according to claim 1, wherein the time curve of the feature is a graph having time as an abscissa axis thereof and a value (feature quantity) obtained by converting the feature to a numerical value as an ordinate axis thereof.

6. A living body light measuring device according to claim 2, wherein the time curve of the feature is a graph having time as an abscissa axis thereof and a value (feature quantity) obtained by converting the feature to a numerical value as an ordinate axis thereof.

7. A living body light measuring device according to claim 3, wherein the time curve of the feature is a graph having time as an abscissa axis thereof and a value (feature quantity) obtained by converting the feature to a numerical value as an ordinate axis thereof.

8. A living body light measuring device comprising:

light measuring means for applying light to a subject and receiving light reflected or transmitted by a head of the subject;

signal processing means for drawing a change of a blood substance when a trial is given to the subject a plurality of times, as a signal waveform on the basis of a measurement signal received by said light measuring means;

result viewer means for displaying a result of processing conducted by said signal processing means; and

input means for sending a command to said signal processing means,

wherein

said input means comprises means for inputting specification of a specific inspection item among a plurality of inspection items, and

said signal processing means extracts at least one feature corresponding to a specific inspection item specified by said input means, and causes said result viewer means to display a time curve of the feature as a graph.

9. A living body light measuring device according to claim 8, wherein said signal processing means comprises:

storage means for storing data, the data accumulating relations between sub-items belonging to the inspection item and the time curve; and

screening means for judging characteristic traits of the subject on the basis of the graph and the accumulated data obtained as to the subject.

10. A living body light measuring device according to claim 8, wherein

the inspection items are classified according to an intake substance of the subject, and

data measured at predetermined time intervals comprise data before and after substance intake time of the subject.

11. A living body light measuring device according to claim 9, wherein

the inspection items are classified according to an intake substance of the subject, and

data measured at predetermined time intervals comprise data before and after substance intake time of the subject.

12. A living body light measuring device comprising:

light measuring means for applying light to a subject and receiving light reflected or transmitted by a head of the subject;

signal processing means for drawing a change of a blood substance when a trial is given to the subject a plurality of times, as a signal waveform on the basis of a measurement signal received by said light measuring means;

result viewer means for displaying a result of processing conducted by said signal processing means; and

input means for sending a command to said signal processing means,

wherein

said input means comprises means for inputting specification of a plurality of inspection conditions comprising subject information and inspection items, and

said signal processing means comprises means for classifying and storing a signal waveform measured at predetermined time intervals, on the basis of an inspection condition specified by said input means, and means for selecting measurement data corresponding to the inspection condition specified by said input means and causing said result viewer means to display a time curve of at least one feature of the measurement data as a graph.