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　　Interpretation of the blood oxygen saturation sensor,the blood oxygen level is a response to a person's overall physical fitness,and the oxygen saturation must be above 95%to be the normal level of the human body.However,many clinical diseases will cause a lack of oxygen supply,which will directly affect the normal metabolism of cells,and even threaten human life in serious cases.Therefore,real-time monitoring of arterial blood oxygen concentration is very important in clinical rescue.Next,Redy-Med Technology Co.,Ltd.will introduce the working principle of the oximeter.

　　The working principle of the blood oxygen saturation meter

　　The traditional blood oxygen saturation measurement method is to first collect blood from the human body,then use a blood gas analyzer to perform electrochemical analysis,measure blood oxygen partial pressure PO2,and calculate blood oxygen saturation.However,this method is cumbersome and cannot be continuously monitored.Therefore,the blood oxygen saturation meter has emerged as the times require.

　　The oximeter is mainly composed of a microprocessor,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 The analog-to-digital converter of the microprocessor is composed.

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　　The oximeter uses a finger cot photoelectric sensor.When measuring,you only need to put the sensor on the human finger,use the finger as a transparent container for hemoglobin,and use red light with a wavelength of 660 nm and near-infrared light with a wavelength of 940 nm as the radiation.Enter the light source,measure the light transmission intensity through the tissue bed,and calculate the hemoglobin concentration and blood oxygen saturation.

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　　Applicable people of blood oxygen saturation meter

　　All medical applications that use oxygen monitoring can benefit from wearable sensors.Patients with diabetes,respiratory conditions,and even sleep apnea could use sensors worn anywhere to monitor their blood oxygen levels.

　　So who is the oximeter suitable for?

　　1.People with vascular diseases(coronary heart disease,hypertension,hyperlipidemia,cerebral thrombosis,etc.)

　　There is lipid deposition in the vascular cavity,and the blood is not smooth,which will lead to difficulty in oxygen supply.Use the oximeter to easily check the blood oxygen situation of the human body.

　　2.Cardiovascular and cerebrovascular patients

　　Viscous blood,coupled with coronary arteriosclerosis,narrows the lumen of the blood vessels,resulting in poor blood supply and difficulty in oxygen supply.The body is"starved of oxygen"every day.Long-term mild hypoxia,the function of the heart,brain and other organs that consume a lot of oxygen will gradually decline.Therefore,for cardiovascular and cerebrovascular patients,long-term use of pulse oximeter to detect blood oxygen content can effectively prevent the occurrence of danger.If hypoxia occurs,the decision to supplement oxygen can be made at the first time,which can effectively reduce the chance of disease attack.

　　3.People with respiratory diseases(asthma,bronchitis,chronic bronchitis,pulmonary heart disease,etc.)

　　The blood oxygen detection of patients with respiratory system is indeed very important.On the one hand,dyspnea will lead to insufficient oxygen uptake;Causes varying degrees of damage to the heart,lungs,brain and even the kidneys.Therefore,using pulse oximeter to detect blood oxygen content can reduce the incidence of respiratory tract.

　　4.Elderly people over 60 years old

　　The human body relies on blood to transmit oxygen.When there is less blood,oxygen will naturally decrease.With less oxygen,the physical condition will naturally decline.Therefore,the elderly should use pulse oximetry to check the blood oxygen content every day.Once the blood oxygen is lower than the warning level,they need to supplement oxygen as soon as possible.

　　5.Sports and fitness crowd

　　Long-term mental work and strenuous exercise are prone to hypoxia,which affects the health of the heart muscle and brain.Such as sports enthusiasts;mental workers;plateau tourism enthusiasts.

　　6.People who work more than 12 hours a day

　　The brain's oxygen consumption accounts for 20%of the whole body's oxygen uptake.When mental work is over,the brain's oxygen consumption will inevitably increase.The human body can take in limited oxygen,consume more and take in less.In addition to causing dizziness,fatigue,poor memory,slow reaction and other problems,it will also cause serious damage to the brain and myocardium,and even cause death from overwork.Therefore,people who study or work for 12 hours a day must use pulse oximetry to detect blood oxygen every day.Content,constantly monitor the health of blood oxygen to ensure the health of the heart and brain.

　　The technical development status of oximeter

　　The original blood oxygen saturation meter was developed by Millikan in the 1940s,and it has been developed for about 80 years.With the continuous development of technology,the performance of the blood oxygen saturation meter is also improving.

　　Traditional oximeters only work on partially transparent areas of the body,such as fingertips or earlobes,and can only measure blood oxygen levels at one point on the body.And thick areas of the body,such as the forehead,arms,and legs,barely pass visible or near-infrared light,making it really challenging to measure oxygenation in these locations.

　　To this end,wearable sensors that map blood oxygen levels through the skin have been developed.