Finger clip oximeter for oximeter, what is the correct way for an oximeter to clip a finger?

By driving a red LED (660nm) and an infrared LED (910nm) in turn, the blue line indicates that the receiving tube induces the curve of reduced hemoglobin when the hemoglobin does not carry oxygen molecules, and it can be seen from the curve that the absorption of reduced hemoglobin to 660nm red light is relatively strong, while the absorption length of 910nm infrared light is relatively weak. The red line represents the oxyhemoglobin induction curve of the receiving tube when the red blood cells with hemoglobin and oxygen molecules are present, and it can be seen from the figure that the absorption of 660nm red light is relatively weak, and the absorption of 910nm infrared light is relatively strong. In the blood oxygen measurement, the reduction of hemoglobin and oxygenated hemoglobin, by detecting the difference between the two types of light absorption to different wavelengths, the measured data difference is the most basic data for measuring blood oxygen saturation.

In the blood oxygen test, the two most common wavelengths of 660nm and 910nm are actually to achieve higher accuracy, in addition to the two wavelengths, it is necessary to increase, even up to 8 wavelengths, the main reason is that human hemoglobin in addition to reducing hemoglobin and oxyhemoglobin, there are other hemoglobin, we are commonly known as carboxyhemoglobin, more wavelengths are conducive to your better accuracy.

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It is advisable to test the finger clip pulse oximeter for about 5 minutes at a time. Finger clip measurement of blood oxygen saturation is advisable for about 5 minutes at a time. The oximeter is the use of pulse oximeter infrared, the fingertip of the oxygen saturation to detect, so as to judge whether the patient has hypoxia, is one of the important clinical detection indicators, a round of which time in five minutes is appropriate, blood oxygen concentration above 95 is a normal phenomenon, less than 90 for hypoxemia, should take relevant measures to improve oxygen supply.

The blood oxygen probe should be placed separately from the arm that measures blood pressure, the nails should not be too long, the hands should be replaced for measurement, the tightness should be appropriate, and the blood oxygen should be kept quiet and avoid large movements during the process of monitoring blood oxygen saturation. How long does it take to measure blood oxygen at a time according to your own situation, but also under the formal guidance of a doctor; If you find any abnormalities after the test, please see a doctor in time** to avoid delaying your condition. Hope mine can help you <>

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1. Which finger should be clamped in the oximeter.

The first time you use the finger oximeter, press the reset button, and the LCD screen will display the standby status.

Press the opening opening. Put the middle finger of your left or right hand into the work compartment (you can see the infrared light in the working compartment, note: the fingers should not be crooked, the hands should not be wet, and there should be no foreign objects on the surface of the nails).

When the finger is in full contact with the chamber, the LCD shows the inspection progress. (Note, to enter the detection state, keep the finger under inspection stable, do not shake up and down, left and right).

After 30 seconds, the clamp is released, the finger is withdrawn from the working chamber, and the LCD freezes the test result. The %spo2 at the top of the screen is the blood oxygen index. The min at the bottom of the screen is the pulse rate and roll rate.

2. The principle of finger oximeter.

Finger oximeter uses light-emitting diodes to emit red and infrared light, and detects human blood oxygen saturation and pulse rate through the brightness of fingers and musculoskeletal tissues. The finger oximeter is small in size, light in weight, easy to carry, simple and convenient, and has low power consumption.

3. Calibration method of oximeter finger clip.

Functional testing devices cannot be used to assess the accuracy of an oximeter. With Tech set to 1 and R curve set to 2, the user can then use this special standard curve to calibrate the oximeter, which is a commonly used method to determine the accuracy of blood oxygen in clinical testing. Arterial hemoglobin oxygen saturation measured with an oximeter and compared with the results of this measurement with the determination of the arterial blood sampled by co-oximeter analysis.

The working principle is: the free blood red egg is combined with the oxygen jujube slip that enters the human body to form oxyhemoglobin, and the two have different light absorption characteristics in the spectrum range of visible light and close to infrared light - the former absorbs more red light and less infrared light; The latter, on the other hand, absorbs less red light and more infrared light.

Specifically, the fingertip pulse oximeter detects the absorption of two beams of light of different wavelengths by peripheral arterial blood, and after the photosensitive element obtains the measurement signal and completes the calculation through the processor, the final result can be displayed, which is the blood oxygen saturation (SPO2) - the percentage of oxyhemoglobin capacity in the blood to the total binding hemoglobin capacity at a certain partial pressure of oxygen. In other words, the oximeter does not need to collect blood, as long as it is clamped on the patient's finger, it can carry out real-time monitoring of blood oxygen saturation, blood perfusion index and other indicators.

The normal value of the blood oxygen content of the finger clip pulse oximeter is above 94, and the blood oxygen detector only shows two parameters, namely the blood oxygen content and the pulse rate. The number of normal pulses coincides with the number of heartbeats, the rhythm is even, and the intervals are equal. A normal person's pulse is 60-100 beats per minute.