HYPOXIA

This study checked how accurately pulse oximeters (devices that clip onto a finger to measure blood oxygen) work in healthy adults whose oxygen levels were temporarily lowered. Eleven participants had their oxygen reduced in a controlled way while the device readings were compare…

This study tested how well three different smartwatches measure blood oxygen levels compared to a standard medical device. Eighteen adults with low oxygen levels wore the watches and a medical pulse oximeter at the same time. The goal was to see if smartwatches can reliably track…

This study looked at 102 children recovering from congenital heart disease surgery to see if the angle of lying face-down (prone) affects heart and lung function. Children were placed at 10°, 30°, or 45° head elevation for at least 12 hours daily. Researchers measured oxygen leve…

This study tested two techniques for removing the breathing tube after a C-section under general anesthesia. 120 women were randomly assigned to have the tube removed with positive pressure (keeping air flowing in) or negative pressure (using suction). The goal was to see which m…

This study checked how well a new pulse oximeter measures oxygen levels and heart rate. Twenty-eight healthy adults aged 18 to 50 took part. Researchers purposely lowered their oxygen levels in a safe, controlled setting to test the device's accuracy across a wide range.

This study checked how well a new pulse oximeter measures oxygen levels and heart rate in 30 healthy adults, both when they were still and moving. Participants had their oxygen levels temporarily lowered in a controlled setting to test accuracy. The goal was to see if the device …

This study looked at how breathing air with more or less oxygen than normal during short, intense exercise (Tabata intervals) changes fitness. Twenty-three healthy men did 3 weeks of cycling workouts while breathing either high-oxygen or low-oxygen air. The goal was to see how ox…

This study checked whether new pulse oximeter devices accurately measure oxygen levels and heart rate in healthy adults, especially when oxygen is low. Twenty-eight volunteers aged 18 to 39 took part. The goal was to confirm the devices work correctly across different skin tones …

This study looked at how low oxygen levels (hypoxia) change blood flow in the arms of healthy men and women. Researchers measured blood flow in 31 adults aged 18-45 to see if men and women respond differently. The goal was to better understand these differences, not to test a tre…

This study checked how accurately pulse oximeters (devices that clip onto a finger to measure blood oxygen) work in healthy volunteers whose oxygen levels were temporarily lowered. Eleven participants had their oxygen saturation and pulse rate measured by the device and compared …

This study tested a prototype system that uses a tilt table and lower body pressure chamber to create conditions of low blood pressure and blood pooling in the legs. The goal is to help military pilots train to avoid blackouts and improve safety. 46 pilots and cadets took part, a…

This study looked at how muscle stem cells (satellite cells) respond to eccentric exercise under low-oxygen conditions in 38 healthy, active men aged 20-49. Researchers took blood and muscle samples at several time points to track the muscle repair process. The goal was to unders…

This study tracked 165 trauma patients to see how often their blood oxygen drops too low during the first 24 hours after arriving at the hospital. Researchers used a special finger clip to measure oxygen levels continuously. They wanted to find out if low-oxygen episodes happen m…

This study checked how accurately pulse oximeters (devices that measure blood oxygen through the skin) work when people are moving and have very low oxygen levels. Five healthy adults had their oxygen and pulse readings compared to blood samples and heart monitors. The goal was t…

This study tested 24 healthy people to see if the finger chosen for a pulse oximeter (SpO2) sensor affects oxygen readings during short-term low oxygen and high carbon dioxide. The goal is to improve accuracy for diagnosing health issues. Results may help doctors pick the best fi…

This study checked how accurately pulse oximeters (devices that clip onto a finger to measure blood oxygen) work in healthy people whose oxygen levels were temporarily lowered. Researchers compared the device readings to actual blood samples. The goal was to see how reliable thes…

This study looked at 48 non-diabetic adults with obstructive sleep apnea to see if those with low oxygen levels (hypoxia) have greater insulin resistance in the liver and fat tissue. Researchers measured how the body makes new fats and stored fat in the liver using special scans …

This study tested whether using a special monitor called the Integrated Pulmonary Index (IPI) can reduce the risk of low oxygen levels in older adults during painless colonoscopy. The IPI combines breathing rate, heart rate, oxygen level, and carbon dioxide to give a single score…

This study checked how accurately pulse oximeters (devices that clip onto a finger to measure blood oxygen) work in healthy people whose oxygen levels were temporarily lowered. Twelve volunteers had their oxygen reduced under controlled conditions while the device readings were c…

This study involved 56 patients having spinal anesthesia for varicose vein surgery. Researchers tested a new monitoring tool called Oxygen Reserve Index (ORi) that can warn of low oxygen earlier than standard methods. The goal was to see how ORi relates to the level of numbness a…

This study looked at whether a smartphone app and a special ring (Belun Ring) can measure sleep quality in adults getting orthodontic treatment. 52 people from a dental school took part. The goal was to see how well these tools track sleep problems like snoring and sleep apnea, n…

This study looked at whether wearing FFP2/N95 masks changes oxygen levels or pulse rate in 60 dental professionals. Participants wore the masks while researchers measured their oxygen saturation and heart rate. The goal was to understand any breathing effects of prolonged mask us…

This study looked at 152 ICU patients who were getting extra oxygen. Doctors checked their oxygen levels using both a simple finger clip (pulse oximeter) and a blood test (arterial blood gas). The goal was to see how well the two methods agree. The results help doctors understand…

This study looked at how sleep apnea and low oxygen levels impact muscle strength and lung function in 30 adults with chronic spinal cord injury. Researchers measured hand grip strength and muscle activity to compare those with and without moderate to severe sleep apnea. The goal…

This study looked at how breathing low oxygen (hypoxia) and high carbon dioxide (hypercapnia) changes heart function in healthy people. Fifteen volunteers took part in short breathing experiments. The goal was to understand these effects, not to treat any disease.

This study looked at how the brain reacts when people exercise in low-oxygen environments, like high altitudes. Thirty healthy men performed exercise while researchers measured brain activity and oxygen levels using special scans and brain stimulation. The goal was to understand …

This study looked at how being at a real high altitude compares to a simulated low-oxygen environment. Twenty healthy adults took part in both conditions. Researchers measured brain oxygen, blood oxygen, heart rate, sleep quality, and altitude sickness. The goal was simply to und…