Cardiopulmonary resuscitation monitoring apparatus

• US 8,712,493 B2
• Filed: 03/09/2012
• Issued: 04/29/2014
• Est. Priority Date: 03/11/2011
• Status: Active Grant

• Current Assignee: Nihon Kohden Corporation
• Original Assignee: Nihon Kohden Corporation
• Inventors: Ukawa, Teiji
• Primary Examiner(s): WINAKUR, ERIC FRANK
• Application Number:
  US13/416,318
• Publication Number:
  US 20120232365A1
• Time in Patent Office: 781 Days
• Field of Search: 600/310, 600/322, 600/323, 600/324, 601/41
• US Class Current: 600/322
• CPC Class Codes: A61B 5/0261 using optical means, e.g. infrared light
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/4848 Monitoring or testing the effects of treatment, e.g. of medication
• CPC Class Codes: A61H 2201/5007 computer controlled
• CPC Class Codes: A61H 2201/5043 Displays
• CPC Class Codes: A61H 2201/5071 Pressure sensors
• CPC Class Codes: A61H 2230/208 used as a control parameter for the apparatus
• CPC Class Codes: A61H 2230/255 used as a control parameter for the apparatus
• CPC Class Codes: A61H 31/005 with feedback for the user
• CPC Class Codes: A61H 31/007 Manual driven

Abstract

A cardiopulmonary resuscitation monitoring apparatus includes: a light source section configured to cause light, which includes at least infrared light, to be incident on a living body; a light receiving unit configured to receive at least one of transmitted light that is transmitted through the living body and reflected light that is reflected from the living body; a calculating unit, based on DC components of received light intensities of the received light, configured to calculate a ratio of the DC components of the received light intensities of the received light during execution of cardiopulmonary resuscitation; an evaluating unit configured to perform evaluation related to the cardiopulmonary resuscitation based on the ratio calculated by the calculating unit; and an outputting unit configured to perform an output in accordance with a result of the evaluation performed by the evaluating unit.

Claims

1. A cardiopulmonary resuscitation monitoring apparatus comprising:

a light source section configured to cause light, which includes at least infrared light, to be incident on a living body;

a light receiving unit configured to receive at least one of transmitted light that is transmitted through the living body and reflected light that is reflected from the living body;

a calculating unit, based on DC components of received light intensities of the received light, configured to calculate a ratio of the DC components of the received light intensities of the received light during execution of cardiopulmonary resuscitation;

an evaluating unit configured to perform evaluation related to the cardiopulmonary resuscitation based on the ratio calculated by the calculating unit; and

an outputting unit configured to perform an output in accordance with a result of the evaluation performed by the evaluating unit.

2. The cardiopulmonary resuscitation monitoring apparatus according to claim 1, wherein:

the light caused to be incident on the living body further includes red light; and

the ratio calculated by the calculating unit is a ratio of DC components of received light intensities of the infrared light and DC components of received light intensities of the red light, during the execution of the cardiopulmonary resuscitation.

3. The cardiopulmonary resuscitation monitoring apparatus according to claim 2, wherein the evaluation related to the cardiopulmonary resuscitation is evaluation related to a rise of blood oxygen saturation.

4. The cardiopulmonary resuscitation monitoring apparatus according to claim 1, wherein:

the light caused to be incident on the living body includes only the infrared light;

the ratio calculated by the calculating unit is a ratio of DC components of received light intensities of the infrared light during the execution of the cardiopulmonary resuscitation; and

the evaluation performed by the evaluating unit based on the calculated ratio is evaluation of a blood flow increase.

5. The cardiopulmonary resuscitation monitoring apparatus according to claim 1, wherein the infrared light has a wavelength in a vicinity of 805 nm.

6. The cardiopulmonary resuscitation monitoring apparatus according to claim 1, wherein the ratio is calculated by using the Lambert-Beer Law.

7. The cardiopulmonary resuscitation monitoring apparatus according to claim 1, wherein the light source and the light receiving unit constitute a pulse oximeter probe.