Fingertrip Pulse Oximetry

The oximeter uses non-invasive infrared technology to measure the fingers, toes, and ears. This is the most common place to measure the oxygen content in blood oxygen. The measurement object is more accurately called the blood oxygen saturation, SpO2, and the The test results are expressed in digital form, mainly showing the ratio of total oxygen saturation under actual oxygen content, generally expressed as a percentage, the typical blood oxygen saturation of the human body is 90-100%, but the minimum can also be over To 60%. The blood oxygen saturation of the human body depends on many factors, the most important of which is the poor blood supply capacity of the patient's body, and the reading of HbO2 will decrease.

The finger oximeter integrates light-sensing technology into the chip, without the need to collect human blood samples, through the light-sensing penetration, monitoring the current oxygen content in blood. At the same time, the human pulse rate is detected. The pen-segment LCD announcement allows users to see at a glance, and easily complete two tests at their fingertips. Finger oximeter is suitable for family, hospital, oxygen bar, community medical and sports health care.

How To Use Finger Pulse Oximeter

  1. When using the finger oximeter for the first time, press the Reset button, the LCD screen displays the standby state
  2. Press to open the grip. Put your left or right middle finger into the work bin (you can see the infrared light in the work bin. Note: your fingers should not be crooked, your hands should not be wet, and there should be no foreign objects on the nail surface)
  3. After the finger is fully in contact with the working compartment, the LCD displays the detection process. (Note, enter the detection state, keep the finger under test stable, and do not shake it up, down, left, or right)
  4. After 30 seconds, release the grip, withdraw your finger from the working warehouse, and the LCD freezes the test results. The% SpO2 at the top of the screen is the blood oxygen indicator. Min at the bottom of the screen is the pulse rate



choiceMMed LEDs produce a high-intensity pure light spectrum.



Choicemmed Light sensor receptor eliminates variations in readings.


Signal Processing

Its signal processing filters out artifacts and interference to show the true pulse.

Finger Oximeter

detection index

From a medical analysis, the blood oxygen content (% SpO2) is greater than or equal to 95, which is a normal index; the pulse rate (/ Min) is between 60 and 100, which is a normal index. If the values you detect do not meet the above two major indicators, please monitor 2-3 times at different time points and maintain continuous monitoring for 2-3 days. If the values still do not meet the standard values, it is recommended that you go to the hospital for detailed consultation .

Principle Of Finger Oximeter

The principle of the finger oximeter is based on the absorption spectrum characteristics of reduced hemoglobin and oxyhemoglobin in the red and near-red light regions, and the Lambert Beer law is used to establish a data processing experience formula. The working principle of the finger oximeter uses photoelectric oximeter detection technology combined with volume pulse plethysmography technology, which uses two beams of light with different wavelengths (660nm red light and 940nm near infrared light) to illuminate the fingernail of human body through the pincer sensor. The measurement signal is acquired by the photosensitive element, and the acquired information is processed by the electronic circuit and the microprocessor to display the measurement result by two groups of LEDs.

Related Products

A leading hypoxia research laboratory compared accuracy in motion between a choiceMMed Medical pulse oximeter with choiceMMed® technology and a competing pulse oximeter. Hypoxia was induced in 13 subjects using an industry standard breathe-down protocol, and motion was generated using a mechanical fixture with tapping and rubbing. SpO2 values were compared to CO-oximetry analysis of arterial blood samples. ChoiceMMed precision was ±2.1; competitor technology precision was ±14.4.1

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