BLOOD OXYGEN SATURATION DETECTION METHOD AND SYSTEM

• US 20150250411A1
• Filed: 10/23/2013
• Published: 09/10/2015
• Est. Priority Date: 09/30/2013
• Status: Abandoned Application

• Current Assignee: Shenzhen Breo Technology Co., Ltd.
• Original Assignee: Shenzhen Breo Technology Co., Ltd.
• Inventors: Ma, Xuejun, Wu, Minghui
• Application Number:
  US14/437,395
• Publication Number:
  US 20150250411A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• CPC Class Codes: A61B 5/14551 for measuring blood gases
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/7278 Artificial waveform generation or derivation, e.g. synthesising signals from measured signals A61B5/327 takes precedence

Abstract

The present application relates to detection technology, it provides a detection method and detection system of blood oxygen saturation, this method includes: controlling two parallel light emitting diodes to emit a red light and an infrared light periodically to a finger; detecting the red light and infrared light passing through the finger and converting them into a red light electrical signal and an infrared light electrical signal respectively; separating pulsating components from the two electrical signals to obtain a separated variation of red light in one cycle and a separated variation of infrared light in one cycle; calculating the blood oxygen saturation based on the variations of red light and infrared light; amplifying and filtering the blood oxygen saturation prior to converting the blood oxygen saturation into digital signal by analog-to-digital converter.

Claims

1. A method for detecting oxygen saturation in a blood comprising:

controlling two parallel light emitting diodes to respectively emit a red light and an infrared light periodically to a finger to be detected;

detecting the red light and infrared light passing through the finger, and converting the transmitted red light and infrared light into a red light electrical signal and an infrared light electrical signal respectively;

separating pulsating components from the two electrical signals to obtain a separated variation of red light in one cycle and a separated variation of infrared light in one cycle;

calculating the blood oxygen saturation based on the variations of red light and infrared light;

amplifying and filtering the blood oxygen saturation prior to converting the blood oxygen saturation into a digital signal by means of an analog-to-digital converter.

2. The method of claim 1, wherein the step of calculating the blood oxygen saturation based on the variations of red light and infrared light comprises:

3. The method of claim 1, wherein the step of amplifying and filtering the blood oxygen saturation prior to converting the blood oxygen saturation into a digital signal by means of an analog-to-digital converter further comprises:

calculating the pulse P according to the electrical signals of red light and infrared light;

in particular,

4. A system for detecting oxygen saturation in a blood comprising:

a control unit for controlling two parallel light emitting diodes to respectively emit a red light and infrared light periodically to a finger to be detected;

a detection unit for detecting the red light and infrared light passing through the finger, and converting the transmitted red light and infrared light into a red light electrical signal and an infrared light electrical signal respectively;

a separation unit for separating pulsating components from the two electrical signals to obtain a separated variation of red light in one cycle and a separated variation of infrared light in one cycle;

a calculation unit for calculating the blood oxygen saturation according to the variations of red light and infrared light;

a conversion and transmission unit for converting the blood oxygen saturation into a digital signal by means of an analog-to-digital converter after amplifying and filtering of the blood oxygen saturation.

5. The system of claim 4, wherein the calculation unit is used for

6. The system of claim 4, wherein the calculation unit can be further used for calculating the pulse P according to the electrical signals of red light and infrared light;

in particular,