The main measurement indicators of the oximeter are pulse rate, blood oxygen saturation, and perfusion index (PI). Oxygen saturation (abbreviated as SpO₂) is one of the important basic data in clinical medicine. Oxygen saturation refers to the percentage of combined O2 capacity in the total blood volume to the total combined O2 capacity.
What chips are used in oximeters?
Household oximeters are mainly divided into finger clip type, wrist type, arm type, handheld type, wearable type, etc. Although the wearing methods are different, the principle is similar. The manufacturers involved include Yuwell, Kangtai, Meiling, Lepu, Haier, Omron, Philips, Corfu and other domestic and foreign brands.
A household oximeter generally consists of an MCU, a memory (EPROM and RAM), two digital-to-analog converters that control LEDs, a device that filters and amplifies the signal received by the photodiode, and digitizes the received signal to provide an analog-to-digital conversion for the MCU. device and other electronic components. Finger oximeters have LEDs and photodiodes housed in small probes that touch the patient's fingertip or earlobe. Pulse oximeters also typically include a small LCD display.
At present, the structure and function of household oximeters are relatively simple. The main reason for the out-of-stock is the sudden market demand. In addition, many people have fever and illness in various links of logistics, resulting in inventory but not being able to send out. The main difficulty in its production lies only in the assembly process. As long as the number of production lines is increased, capacity expansion can be achieved. For example, in early 2022, Brilliant increased production by 350,000 finger-clip oximeters within one month to support the Hong Kong epidemic.
However, just as the demand for forehead temperature guns has driven the growth of ADC chips and MCU chips, oximeters with more complex structures will also accelerate the digestion of more related electronic component stocks. Although the chip consumption is not large, it may It can bring some respite to the chip market in the down cycle.