View clinical trials related to Hypoxia.
Filter by:This study seeks to determine whether a simple, single intervention of Cetirizine / Zyrtec® use can improve exercise performance of active individuals when acutely exposed to altitude. For this project, healthy subjects will perform steady state and progressive work rate exercise, endurance performance time trials, and repeated sprint performance time trials in the laboratory at a simulated altitude of 3000m (9900ft) after dosing with 10 mg of Cetirizine or a placebo in a repeated measures design.
Long-term oxygen therapy (LTOT) is the reference treatment for chronic respiratory failure. This treatment is based on the principle of oxygen supplementation via a source to correct hypoxemia in patients. At present, adherence to this treatment is difficult to evaluate (reporting by patients), but the results of the literature show poor LTOT compliance. It is therefore important to accurately measure the oxygen consumption by patients and to understand the factors explaining LTOT compliance. The ultimate aim is to improve our patient management to make them more observant in order to improve the therapeutic efficacy of the treatment.
Upon suffering a concussion, a neurometabolic cascade including an increase in glucose and oxygen demand occurs for up to 48 hours post-insult.5 This period of increased glucose and oxygen demand is coupled with a period of hyperperfusion and decreased cerebral blood flow. 6-9 Cryotherapy in the musculoskeletal system has been shown to decrease tissue temperature, blood flow, oxygen and metabolic demands.10-17 Cryotherapy following moderate or severe traumatic brain injury has been demonstrated to decrease intracranial metabolic processes and oxygenation consumption.18-23 Although the benefits of cryotherapy have been established in moderate-severe TBI, the effects of superficial cranial cooling in individuals with and without concussion are unknown. The purpose of this randomized control trial is to evaluate the effects of superficial cryotherapy on cerebral blood flow and cognitive function in healthy, recreationally active young adults.
The main purpose of this study is to learn how patients breathe on portable oxygen concentrators (POCs), and to get feedback from patients using POCs.
Pneumonia is a lung infection. Fiberoptic bronchoscopy is a test to diagnose the type of lung infection. While this procedure is being performed, a small amount of oxygen is delivered into the nose (low flow nasal cannula). Occasionally during this procedure, the blood oxygen of the patient may drop and an intervention such as increasing the oxygen flow, or placing the patient on a breathing machine is required. An alternative device called 'Optiflow' can provide high flow oxygen through nasal cannula, and is comfortable for patients. If Optiflow is used during bronchoscopy, it may prevent the blood oxygen from dropping.
The aim of the COSGOD Phase III trial is to examine, if it is possible to increase survival without cerebral injury in preterm neonates <32 weeks of gestation by monitoring the cerebral tissue oxygen saturation in addition to routine monitoring of arterial oxygen saturation and heart rate and specified clinical treatment guidelines during immediate transition period after birth (the first 15 minutes).
Neonatal hypoxic-ischemic encephalopathy (HIE) is a major cause of death or long-term disability in infants born at term in the western world, affecting about 1-4 per 1.000 life births and consequently about 5-20.000 infants per year in Europe. Hypothermic treatment became the only established therapy to improve outcome after perinatal hypoxic-ischemic insults. Despite hypothermia and neonatal intensive care, 45-50% of affected children die or suffer from long-term neurodevelopmental impairment. Additional neuroprotective interventions, beside hypothermia, are warranted to further improve their outcome. Allopurinol is a xanthine oxidase inhibitor and reduces the production of oxygen radicals and brain damage in experimental, animal, and early human studies of ischemia and reperfusion. This project aims to evaluate the efficacy and safety of allopurinol administered immediately after birth to near-term infants with HIE in addition to hypothermic treatment.
Evaluate the performance of 4 pulse oximeters in 10 healthy adult volunteers with three motions compared to non-motion control at three arterial oxygen saturation target plateaus.
The fetal heart plays a central role in the adaptive mechanisms for hypoxemia and placental insufficiency. Longitudinal data on the hemodynamic sequence of the natural history of fetal growth restriction show that the umbilical artery and middle cerebral artery are the first variables to become abnormal . These arterial Doppler abnormalities are followed by abnormalities in the right cardiac diastolic indices, followed by the right cardiac systolic indices, and finally by both left diastolic and systolic cardiac indices . Preserving the left systolic function as the last variable to become abnormal ensures an adequate left ventricular output , which supplies the cerebral and coronary circulations.This defence is contingent on the fetal cardiovascular system, which in late gestation adopts strategies to decrease oxygen consumption and redistribute the cardiac output away from peripheral vascular beds and towards essential circulations, such as those perfusing the brain. Adding cardiac Doppler may improve management of the IUGR fetus(intrauterine growth retardation), Doppler ultrasound is valuable in defining the degree of cardiovascular compromise in at-risk pregnancies. The severity of fetal blood flow redistribution shows the degree of fetal adaptation and provides information on how long the pregnancy can be continued safely. The aime of the study is assessment of cardiac output redistribution in fetal hypoxia by estimating relative right to left side cardiac output wich reflect cardiac sparing in (IUGR).
Early hemodynamic effects (within 3 hours of life) of Delayed Cord Clamping compared to Umbilical Cord Milking are still unknown. Four sites experienced in the use of NIRS and who have appropriate data collection equipment in the delivery room (Alberta, Ulm, Cork and San Diego) will obtain and report the physiological changes with UCM and DCC from birth until 24 hours of life. This data will yield the largest available sample of continuously recorded heart rate, cerebral tissue oxygenation, peripheral oxygen saturation, airway pressure, and administered FiO2 to delineate the short term responses to two methods of placental transfusion. In our initial trial we demonstrated increased blood pressure from 3-15 HOL with UCM compared to DCC in premature newborns <32 weeks, but did not show any differences in cerebral oxygenation.