An oximeter is a medical device used to measure the body's blood oxygen saturation. It uses a non-invasive method, that is, placing the sensor on the end of the human finger, and irradiating it with an infrared light source to obtain the light absorption characteristics of oxyhemoglobin and deoxygenated hemoglobin in the blood to measure blood oxygen saturation.

1. Product structure 

      The oximeter consists of two parts: the host computer and the sensor. The host is usually a small handheld device with an integrated processor and display used to process and display measurement results. One end of the sensor is connected to the host, and the other end is placed on the end of the patient's finger to sense changes in light, and the acquired data is transmitted to the host through a connecting cable.

2. Working principle 

      The oximeter uses an infrared light source to illuminate the tip of the patient's finger. When passing through the blood, the light will be absorbed by oxyhemoglobin and deoxygenated hemoglobin in the blood. The sensor senses the change in absorbed light intensity and converts it into an electrical signal and sends it to the host. The host processes these signals, calculates the blood oxygen saturation value, and displays the results on the display in real time.

3. Product parameters 

• Visible screen type: OLED blue and yellow two-color visible screen

• Blood oxygen saturation: Measuring range: 70%~10o%, accuracy: ±1%

• Heart rate: Measuring range: 25BPM~250BPM, accuracy: ±1BPM

• Blood flow accumulation index: ≥0.3%, ±0.1%

• Visible screen type: OLED visible screen

• Manually adjust the interface orientation: 6 visible modes, 4 visible directions

• LED visible: test value and bar graph visible simultaneously

• Low battery voltage indicator light

  
  

4. Scheme design 

1. Hardware part

Main components of this solution  

2. Software part

5. Application fields 

      Oximeter is widely used in hospitals, homes, sports training venues and other scenarios. In hospitals, oximeter is often used to monitor the blood oxygen status of patients in surgery, intensive care, anesthesia and other environments, as well as for early screening of cardiovascular diseases, lung diseases, etc. In homes, oximeter can help people monitor their physical health in real time, especially the elderly and people with acute or chronic respiratory diseases. In sports training venues, oximeter can be used to monitor athletes' blood oxygen saturation to evaluate training effects and adjust training intensity.