View clinical trials related to Hypoxia.
Filter by:Patients with treatment-naive obstructive sleep apnea (OSA) who need continuous positive airway pressure (CPAP) therapy on clinical basis are included as well as healthy controls without OSA. 15 cc peripheral venous blood is drawn on the date of diagnosis of OSA and 3-6 months after CPAP therapy. Granulocytes are harvested and tested for its function, such as phagocytosis, reactive oxygen species (ROS) production and bacteria-killing ability.
The purpose of the present study is to determine whether there are sex differences in the reflex responses to hypoxia in humans.
Intubation of patients in the intensive care unit (ICU) carries a risk of potentially severe complications, including cardiac arrest. Hypoxemia is common in ICU patients requiring intubation, which must be performed rapidly to avoid aspiration, since the patient is usually not in the fasted state. Studies have assessed interventions designed to improve intubation success rates, such as routine neuromuscular blockade. Care bundles combined with training on simulators have improved the safety of intubation. Nevertheless, intubation in the ICU still carries higher morbidity and mortality rates compared to intubation in the operating room. Preoxygenation is a cornerstone of safety for intubation in the ICU. Several recent trials have investigated different devices (non-rebreather mask, non-invasive ventilation, high flow nasal cannula, bag valve mask) with conflicting results. A main reason for those results is that efficiency of the preoxygenation period cannot be evaluated in the ICU in opposite to the operating room: gas monitoring are not available in ICU and even if it was the case, high flow demand from the patient, and agitation will make it inefficient. Additionally, desaturation is frequent (from 10% up to 50%) during intubation in ICU and lead to morbidity and mortality; so anticipation of desaturation is a major concern for ICU's physician because it's impacting care (face mask ventilation, early insertion of subglottic device). The oxygen reserve index (ORI) is a new parameter for monitoring oxygen reserve non-invasively. In this context, the investigators purpose to analyze efficiency of preoxygenation and time allowed by ORI for medical interventions before hypoxemia during intubation in the ICU in a pilot observational study in our medical ICU in a university hospital.
Randomized crossover trial in patients with Pulmonary Hypertension (PAH, CTEPH) to assess the acute response to simulated altitude (FIO2: 15.1% = equivalent to 2500m above sea level) on heart rate and Ventilation changes under exercise.
Randomized crossover trial in patients with Pulmonary Hypertension (PAH, CTEPH) to assess the acute response to simulated altitude (FiO2:15.1, equivalent to 2500m above sea level) in constant loaded exercise capacity.
Low oxygen at altitude causes pauses in breathing during sleep, called central sleep apnea. Central sleep apnea causes repeated awakenings and poor sleep. Low oxygen itself and the induced oxidative stress can damage mental function which is likely worsened by poor sleep. Reduced mental function due to low oxygen can pose a serious danger to mountain climbers. However there is also mounting evidence that even in populations of people that live at high altitudes and are considered adapted, low oxygen contributes to reductions in learning and memory. Therefore there is a serious need for treatments which may improve sleep, control of breathing and mental function during low oxygen.Therefore this study aims to determine how melatonin effects control of breathing, sleep and mental performance during exposure to low oxygen.
The study assesses and compares the effect of 'pulse oximetry' (PO) used by Lady Health Workers (LHWs) at household level on increasing hospital referral acceptance rates in intervention clusters (district Jamshoro) for 0-59 months old children with severe pneumonia with the effect of LHWs using clinical signs alone in non-intervention clusters of the same district.
Randomized crossover trial in patients with Pulmonary Hypertension (PAH, CTEPH) to assess the acute response to simulated altitude (FIO2: 15.1% = equivalent to 2500m above sea level) on ECG repolarizations and non-invasive blood pressure measurements by Finapres® NOVA Technology.
Randomized crossover trial in patients with Pulmonary Hypertension (PAH, CTEPH) to assess the acute response to simulated altitude (FIO2: 15.1% = equivalent to 2500m above sea level) on non-invasive cardiac output assessments by Finapres® "NOVA" Technology at rest and under exercise.
Subjects with recurrent glioblastoma who are candidates for bevacizumab treatment according to standard of care will be eligible for this study. Positron emission tomography (PET/CT) imaging will use the investigational radiotracer [18F]FMISO to image the brain and evaluate for hypoxia pre and post therapy.. Subjects will also undergo up to three Brain MRIs.