Experts are calling for the use of pulse oximeters to monitor patients' blood oxygen levels and provide early warning


During World War II, a young American physiologist named Glenn Allen Millikan developed an ear oximeter to monitor the lack of oxygen in military pilots.However, the device, which is attached to the ear, is not accurate.

In 1958, tadao Qingliu, 22, graduated in electrical engineering from the Engineering department of Niigata University and went to work for a scientific instrument company in Kyoto.In 1971, he moved to A Japanese medical device company called Nihon Kohden and began working on the development of medical devices.

When the young Mr. Seiyu worked at Nihon Kohden, there were early devices that could monitor oxygen levels in a person's blood, but they were bulky and inaccurate.She set out to find a more portable and accurate way to detect oxygen saturation in a person's blood without drawing blood.

Began to be engaged in the work of the study of the pulse oximetry, at the beginning of the second world war the ear oximeter has attracted the attention of the green LiuZhuoXiong, he began to study the secrets behind the device: undertake oxygen function of hemoglobin in the blood and oxygen when combined absorb light in different ways, and the device is using this, using two different wavelengths of light (red light and infrared light) to measure the blood oxygen content of the pilot.

Inspired by this method, the 38-year-old developed an oxygenometer that measured human blood oxygen content three years later by shining light into the blood vessels of his fingertips, without having to collect blood.

In 1972, while working on a dye dilution method (in which a non-toxic dye is injected into the patient as an indicator) to measure the volume of blood pumped through the human heart, Qingliu discovered that the flow of human blood produces a "noise" that interferes with the dye dilution curve and carries important information about arterial oxygenation.He used innovative technology to eliminate this noise so that oxygen levels could be clearly read.This led him to find a way to measure pulse oximetry using two different wavelengths of light.

On April 26, 1974, Asahio reported his pulse oximetry to the Medical Electronics and Biologic Engineering Society of Japan (MEBE) and, together with his collaborator and colleague Michio Kishi, created a prototype pulse oximeter, and in 1974 their company filed a patent application naming them as inventors.Five years later, the invention was patented.

Pulse oximeter

In 1975, the first commercial pulse oximeter was developed using Cyanogma's method.The oximeter consists of a probe containing a luminescence device and two photodetectors. Two wavelengths of light pass through the earlobe to the photodetector, and the change in absorbance at each wavelength is measured according to arterial blood pulsation.The device rapidly and noninvasively evaluates oxygenation in patients, enabling clinicians to detect hemodynamic and respiratory abnormalities earlier, avoid patient injury, and evaluate the effectiveness of clinical interventions in real time.

Since then, Qingliu has continued to promote the development of oxygen monitoring technology, stimulating the innovation of oxygenometer equipment around the world.His principles and inventions were adopted by related medical device companies around 1978, and then improved to produce commercial oxygenometer and successfully sold in the market.In 1986, the American College of Anesthesiologists recommended that pulse oximeters be used to monitor patients undergoing anesthesia.Since then, oximeters have become smaller, more sophisticated, and more importantly, less expensive, making them available in wards and operating rooms around the world, and in the homes of ordinary people.

In recent years, QingliuZhuoxiong's invention has been more and more recognized by people.The invention has been strongly supported by the World Health Organization and is especially suitable for patients undergoing anesthesia during surgery.In today's advanced medical technology, many companies are selling oximeters with various forms and complete functions, but all pulse oximeters are based on The original pulse oximeter principle of Qingliu Zhuo Xiong.

For many years, body temperature, pulse, breathing rate and blood pressure has always been the medical profession as the patient's four main vital signs, but until the late 1980 s, the green LiuZhuoXiong start pulse blood oxygen determination technology began to be widely accepted, blood oxygen saturation, there is a possibility of the real-time detection to be medicine into the patient's "vital signs" 5 - that is whether the oxygen from the lungs and heart to the patient's body to another part of the key indicators.

Before were invented, it was reported that between 2,000 and 10,000 patients worldwide died each year from undetected hypoxemia.With the invention of the pulse oximeter, life-threatening conditions such as severe pneumonia, respiratory failure, acute asthma, etc., could be identified in time.Today, oxygen saturation measurements cover almost all areas of medical practice and are standard practice for patients undergoing general anesthesia.

Not only that, but many people with chronic diseases can use pulse oximeters to monitor their blood oxygen levels at home, so that they can better understand their physical condition.This convenience was unimaginable in the decades before the invention of blood oxygen measurements in the early 1970s.

In 2007, the World Health Organization (WHO) recognized pulse oximetry as one of the most important measurements during surgery.Since then, WHO has launched the Global PULSE Oximetry Project to ensure that every patient undergoing surgery is monitored for pulse oximetry.

In 2015, the Institute of Electrical and Electronics Engineers (IEEE) awarded Him the Medical Technology Innovation Medal and announced that his research had led to a "fourfold reduction in anesthesia mortality."Each year, the honor is awarded to individuals and teams who have made outstanding contributions or innovations in medicine, biology, and healthcare technology.Takeo Tsing is the first Japanese man to receive the award for his pioneering work on a pulse oximeter.

Health tips - Blood oxygen levels are a reflection of a person's overall physical fitness. A blood oxygen saturation of more than 95% is the body's normal level.· Harm of insufficient blood oxygen to human body: dizziness and drowsiness; lack of energy.If the blood oxygen oxygen content is insufficient for a long time, the cerebral cortex will be damaged, prone to cardiac arrest, myocardial failure, blood circulation failure and a series of serious consequences.· Who needs to pay attention to blood oxygen levels: patients with cardiovascular and cerebrovascular diseases, patients with respiratory diseases, elderly people over 60 years old, people with high intensity exercise, people who work/study for more than 12 hours a day, etc.