Patent ID: 11911154
Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A blood oxygen saturation detection system, comprising:
a front-end flexible blood oxygen saturation detection circuit,
the front-end flexible blood oxygen saturation detection circuit comprising a flexible packaging material to act as a flexible packaging layer, and
an adhesive functional layer positioned on a surface of the front-end flexible blood oxygen saturation detection circuit, wherein the adhesive functional layer is configured to be directly adhered to skin of a user, so that the blood oxygen saturation detection system is entirely adhered to the skin of the user, and wherein the front-end flexible blood oxygen saturation detection circuit is configured to noninvasively detect blood oxygen saturation of a human tissue through a reflective optical principle, so as to obtain a blood oxygen saturation signal,
a CC2640 core processor, wherein the CC2640 core processor is connected to the front-end flexible blood oxygen saturation detection circuit, the CC2640 core processor is configured to process the blood oxygen saturation signal detected and obtained by the front-end flexible blood oxygen saturation detection circuit by:
reducing ambient light interference through signal filtering, calculating a ratio of projected light intensity in a same pulsation process using a peak-to-valley value, calculating a blood oxygen saturation value through a formula of, SpO
   2
  
  =
  
   A
   +
   
    B
    *
    
     
      D
      1
     
     
      D
      2, both wherein A and B are predetermined constants, or through SpO2=a*(D1/D2)2+b*(D1/D2)+c, wherein a, b and c are predetermined constants, D1 represents a ratio of an absorption peak-to-valley value of light intensity with a wavelength λ1, D2 represents a ratio of an absorption peak-to-valley value of light intensity with a wavelength λ2, and λ1 and λ2 are both predetermined in the formula, transmitting the calculated blood oxygen saturation value to a mobile terminal through a Bluetooth antenna transmission module.