Finger clip pulse oximeter principle pulse oximeter

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Finger Clip Pulse Oximeter Finger Clip Pulse Oximeter Price Finger Pulse Oximeter Monitor Finger Pulse Oximeter Heart Rate Rapid Monitor Blood Oxygen Saturation Monitor Oximeter Brand Which one is better
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) The oximeter is suitable for monitoring sleep respiratory blood oxygen for various patients with respiratory and lung diseases such as sleep snoring, sleep apnea syndrome, nocturnal hypopnea syndrome, etc., reducing People who suffer from suffocation, shock, death and other tragedies.
)The principle of the finger-clip pulse oximeter is based on the change in light absorption during arterial pulsation. Two light sources located in the visible red light spectrum (nanometer) and infrared spectrum (nanometer) alternately illuminate the tested area (usually the fingertip or earlobe). The amount of light absorbed during these pulsations is related to the oxygen content of the blood. The microprocessor calculates the ratio of the two absorbed spectra and compares the result with a table of saturation values stored in memory to derive the blood oxygen saturation.
) The oximeter uses non-invasive measurement infrared technology to measure the oxygen content in fingers, toes, and ears. This is the most common place to measure blood oxygen. The measurement object is more accurately called blood oxygen saturation, that is, , and express the tested results in digital form. It mainly displays the ratio of total oxygen saturation under actual oxygen content, generally expressed as a percentage. The typical blood oxygen saturation of a healthy human body is ~%, but the lowest is also It can be passed to %. The human body's blood oxygen saturation depends on many factors, the most important of which is that the patient's body's blood supply capacity is relatively poor, and the reading will decrease. []
) First of all, let’s introduce how oxygen is delivered to various organs of the human body. Inside the capillaries are red blood cells. The size of red blood cells is very small, very, very small. The size is about microns in diameter and thickness is microns. Each Cells have a lifespan of several days and can be recycled and regenerated by the body. These cells in the human body are produced by the bone marrow, and each cell takes days to produce. The adult body produces thousands of cells per second, which are stimulated by hormones. Some athletes will inject these hormones, so that they can produce more red blood cells than ordinary people. The more red blood cells, the stronger their ability to carry oxygen. During the competition, The advantage is very obvious for those who do not have injections, so in sports competitions we often hear stories about hormone injections. Each adult has trillions of red blood cells, and men have % more red blood cells than women.
) The main function of red blood cells is to deliver 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 a protein bound by red blood cells called hemoglobin, while in the blood There are two forms of hemoglobin: oxygenated hemoglobin and reduced hemoglobin. The highly saturated hemoglobin molecule includes an oxygen molecule. Every red blood cell in the human body circulates from the lungs, from the arteries through the capillaries back to the jugular. When the oxygen molecules fall off and then come back, it takes about seconds.
)Judgment, harm and treatment of hypoxia based on blood oxygen saturation
)Hypoxia is an imbalance between the body's oxygen supply and oxygen consumption, that is, the metabolism of tissue cells is in a hypoxic state. Whether the body is hypoxic or not depends on the amount of oxygen transport received by each tissue and whether the oxygen reserve can meet the needs of aerobic metabolism. The harm of hypoxia is related to the degree, occurrence speed and duration of hypoxia. Severe hypoxemia is a common cause of anesthesia death, accounting for approximately 10% of deaths from cardiac arrest or severe brain cell damage.
) Clinically, it is generally considered hypoxia, which is basically equivalent to severe hypoxemia.
) Hypoxia has a huge impact on the body. For example, the impact on liver and kidney function. The first thing that occurs during hypoxia is a compensatory heart rate acceleration, an increase in heart rate and cardiac output, and the circulatory system compensates for the lack of oxygen content in a high-dynamic state. At the same time, blood flow is redistributed, and brain and coronary blood vessels are selectively expanded to ensure adequate blood supply. However, in severe hypoxic conditions, due to the accumulation of subendocardial lactic acid, the synthesis is reduced, resulting in myocardial depression, leading to bradycardia, premature contractions, decreased blood pressure and cardiac output, as well as arrhythmias such as ventricular fibrillation and even Arrest.
) In addition, hypoxia and the patient's own disease may have an important impact on the patient's homeostasis.
)The blood oxygen saturation range from % to % is %, and there is no definition if it is less than %
)The blood oxygen value of a normal person is %~%. If the blood oxygen value is lower than %, it is hypoxemia. When the blood oxygen saturation is When the oxygen value is higher than %, the accuracy is higher. When it is lower than %, there may be errors. The measured data is undefined, that is, meaningless.
) The normal value can be determined based on its measured value as %, mild hypoxia%~%, moderate hypoxia%~%, and severe hypoxia%.