Working Principle Of Finger Pulse Oximeter Medical Grade

Spo2 finger monitor is an important diagnostic product.It gradually enters tens of thousands of people’s families as people find it is as necessary as other home care medical products such as blood pressure monitors.We would like to introduce the working principle of finger pulse oximeters medical grade to you.
Product description

Spo2 finger monitor is an important diagnostic product.It gradually enters tens of thousands of people’s families as people find it is as necessary as other home care medical products such as blood pressure monitors.We would like to introduce the working principle of finger pulse oximeters medical grade to you.


How does a finger oximeter work?

We first introduce how oxygen is delivered to various organs of the body. In the capillaries there are red blood cells. The size of the red blood cells is very small, and the size is about 6-8 microns in diameter, and the thickness is 2 microns. The life span of each cell is 100-120 days, and it can be recovered and regenerated by the body. The cells of the human body are produced by the bone marrow, each of which takes 7 days to produce. The production of adult body cells is 4 million per second, produced by hormonal stimulation of EPO.Every adult has 20-30 trillion of red blood cells and red blood cells of men are 20 % more than women.


The main function of blood red blood cells is to send oxygen from the lungs to the organs of the human body to ensure the work of each organ. In the lungs, oxygen is attached to the protein bound by the red cell, known as the Hb. There are two forms of hemoglobin in the blood: oxygenated hemoglobin (HbO2); reduced hemoglobin (Hb). 4 oxygen molecules are included in the highly saturated hemoglobin molecules. The circulation of every red cell in the body circulates from the lung.When the artery passes through the capillary to the cervical vein, the oxygen molecule falls off and then comes back. It takes about 20 seconds.


Finger pulse oximeters in turn drives a red LED (660nm) and an infrared LED (910nm). Blue lines of spo2 finger monitor indicate the reduction of hemoglobin induction curves when the hemoglobin is free from oxygen molecules. It can be seen from the curve that the reduction of the reduced hemoglobin is stronger for the absorption of 660nm red light, while the absorption length of the 910nm infrared light is weak. Red lines of finger pulse oximeter indicate hemoglobin and blood red blood cells with oxygen molecules in the receiving tube to the oxygenated hemoglobin induction curve. It can be seen from the map that the absorption of 660nm red light is weak, and the absorption of 910nm infrared light is stronger. In the measurement of blood oxygen, the difference between the two absorption wavelengths of different wavelengths is detected and the data difference is the most basic data for measuring blood oxygen saturation. In the blood oxygen test, 660nm and 910nm are the two most common wavelengths. In fact, a higher precision is needed, in addition to two wavelengths, or even up to 8 wavelengths of spo2 waveform. The main reason is that human hemoglobin has other hemoglobin besides hemoglobin and oxygenated hemoglobin. What we often see is carboxy hemoglobin. More wavelengths are good for you to have a more accurate measurement of pulse oximetry.


Data sheet of finger pulse oximeters

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Power supply: 1.5V (AAA size) alkaline batteries *2

Package: 1pc/box, 100 boxes per carton

Optional package: 1 pc/protection pack, 1 pack/box, 100 boxes per carton

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International certification: CE & FDA


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