Active clinical trials for "Hypoxia"

This study will evaluate the effectiveness of an automated voice prompting system on post operative hypoxia within the Postoperative Anesthesia Care Unit (PACU). This will be done to detect an improvement of the patient experience and provider care through a decrease in the number of peripheral capillary oxygen saturation (SpO2) monitor alarms via the patients own ability to follow the instruction and improve their SpO2 levels.

Exposure to acute intermittent hypoxia (AIH) can facilitate of motor output but no studies of sensory effects has been reported.

Patients with respiratory failure often need oxygen and/or ventilatory support. Patients who need only oxygen support, usually received low flow oxygen (< 15 Liters / min), as well as in respiratory weaning. Now new devices can be used. They provide high flow oxygen with different benefits. This high flow devices provide exact fraction of inspired oxygen (FiO2), allows a positive end expiratory pressure and supplies a wash out flow. The hypothesis of this study is that the high flow oxygen enable more efficient oxygen administration than conventional oxygen. In addition, it would improve the effectiveness of the ventilation of the patient, through flushing the dead space.

The investigators hypothesize that this new nasal cannula will prevent lack of oxygen as well as reduce rebreathing of carbon dioxide under ophthalmic drapes during eye surgery.

The study will aim to describe and evaluate the effect of beetroot juice supplementation upon whole body running exercise at altitude. It is hypothesised that beetroot supplementation will decrease time to complete a 10 km time trial.

Bronchiolitis is a lower respiratory tract infection (LRTI) syndrome cause by different types of viruses and occurs in young children. Although bronchiolitis is a widespread and fairly common illness in children, pediatricians vary significantly in how it is treated. This includes how children are monitored for their oxygen status when not receiving supplemental oxygen. Studies suggest that continuous pulse oximetry measurement of children admitted to the hospital with bronchiolitis regardless of use of supplemental oxygen prolongs their hospital stay. This increases the cost of care for these patients and increases their risk of hospital-associated complications. This study is a randomized trial of continuous pulse oximeter use in patients admitted with bronchiolitis versus transitioning patients not requiring oxygen to intermittent pulse oximetry monitoring. The investigators hypothesize that this will decrease length of stay as well as associated costs of care and number of medical interventions performed in the hospital.

The purpose of this clinical study is to validate the SpO2 accuracy of the BiOSENCY BORA BAND™ wristband Pulse Oximeter during non-motion conditions over the range of 70-100% SaO2 as compared to arterial blood samples assessed by CO-Oximetry. The end goal is to provide supporting documentation for the SpO2 accuracy validation of BORA BAND™ wristband Pulse Oximeter. It is required that the Accuracy Root Mean Square (ARMS) performance of the BORA BAND™ wristband Pulse Oximeter will meet a specification of 3.5 or better in non-motion conditions for the range of 70 - 100% SpO2 thereby demonstrating an acceptable SpO2 accuracy performance specification.

The degree to which endurance exercise performance is diminished in acute hypoxia is variable and appears to be the result of several different physiological processes, however this research focuses on hypoxic pulmonary vasoconstriction (HPV). Sildenafil, a pulmonary vasodilator, has been used with mixed results to improve athletic performance in hypoxia. Because sildenafil has been shown to reduce HPV in some individuals, we believe that its effectiveness is closely related to the magnitude of the HPV response and the degree that individual exercise performance declines in hypoxia. This research will investigate the relationship between sildenafil, HPV, and exercise performance.

The investigators will conduct a non-randomized clinical trial to examine the effect of pure oxygen breathing on the brain. The study will compare cerebral blood flow, cortical electrical activity, and cognitive performance in 32 persons during room air (21% oxygen) breathing and pure oxygen (100% oxygen) breathing. Subjects will be used as their own controls. The investigators aim to: Determine whether breathing 100% oxygen changes blood flow through the brain. The investigators will learn whether brain blood flow is increased, decreased or stays the same. Determine if changes that might occur in brain blood flow are also accompanied by changes in the brain's electrical activity (EEG). Learn whether changes in the speed at which the brain processes information (cognitive function) accompany changes in brain blood flow and electrical activity that may be seen.

To study hemodynamic effects of acute normobaric hypoxia during exercise in patients with pulmonary hypertension in a single-center randomized controlled trial.