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Active clinical trials for "Hypoxia"

Results 691-700 of 998

Using Fluorine-18-Labeled Fluoro-Misonidazole Positron Emission Tomography To Detect Hypoxia in...

Head and Neck Cancer

The main purpose of this study is to evaluate low oxygen areas called hypoxia within tumors. These low oxygen areas are thought to be the reason why tumors are more resistant to chemotherapy and radiation treatment. An imaging technique using a hypoxia tracer called fluoromisonidazole (FMISO) can detect low oxygen areas within a tumor. This imaging technique, called a PET scan, uses positively charged particles to detect slight changes in the body's biochemistry and metabolism. FMISO PET scans have been performed in patients with head and neck cancer and have shown the ability to detect low oxygen areas within tumors.

Completed11 enrollment criteria

Helmet Noninvasive Ventilation vs. High-flow Nasal Cannula in Moderate-to-severe Acute Hypoxemic...

Respiratory Failure With Hypoxia

Helmet noninvasive ventilation and high-flow nasal cannula are novel tools for the first-line treatment of acute hypoxemic respiratory failure. Compared to face-mask noninvasive ventilation in randomized trials, both have improved clinical outcome of patients with moderate-to-severe hypoxemic respiratory failure. As compared to high-flow nasal cannula, helmet noninvasive ventilation improves oxygenation, reduces inspiratory effort, respiratory rate and dyspnea. Whether these physiological benefits are translated into improved outcome remains to be established. The investigators designed a randomized trial to establish whether first line treatment with Helmet noninvasive ventilation is capable of increasing the number of 28-day respiratory-support-free days, as compared to high-flow nasal cannula in patients with moderate-to-severe acute hypoxemic respiratory failure.

Unknown status2 enrollment criteria

Pulse Oximeter Hypoxia

Oximetry

The aim of this project is to test the accuracy of pulse oximeters (devices intended to measure oxygen saturation in blood noninvasively) during mild, moderate and severe hypoxia (a lower-than-normal concentration of oxygen in arterial blood); ie, a range of arterial HbO2 saturations from 100 to down to 70%. This is done by comparing the reading of the pulse oximeter during brief, steady state hypoxia with a gold-standard measurement of blood oxyhemoglobin (hemoglobin carrying oxygen) saturation, that is arterial blood sample processed in a laboratory.

Completed20 enrollment criteria

SuperNO2VA Et Versus Oxygen Face Mask During Deep Sedation

Hypoxemia

The primary objective of the study is to prospectively and randomly compare the incidence, duration, and severity of oxygen desaturation between a nasal mask with nasal positive airway pressure (PAP) versus oxygen therapy with a facemask during procedural deep sedation in patients considered high risk for hypoxia (ie: BMI ≥30 kg/m2 or documented Obstructive Sleep Apnea.

Completed13 enrollment criteria

Analysis of Protein and Emotional Alterations During and After Hypobaric Hypoxia

HypoxiaAltitude

This study analyses both Protein Expression and emotional alterations during hypobaric hypoxia in volunteers of different groups.

Completed2 enrollment criteria

Acute Exposure of Simulated Hypoxia on Cardiac Output

Pulmonary Hypertension

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.

Completed12 enrollment criteria

Acute Exposure of Simulated Hypoxia on Pulmonary Artery Pressure and Right Heart Function (Echo)...

Pulmonary Hypertension

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 pulmonary artery pressure and right heart function (Echo).

Completed12 enrollment criteria

Acute Exposure of Simulated Hypoxia on Cognitive Function

Pulmonary Hypertension

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 cognitive functions.

Completed12 enrollment criteria

Comparison of Three Scores for Ultrasound Assessment and Monitoring of Pulmonary Aeration

AtelectasisPneumonia4 more

This study is designed to compare three ultrasound-based aeration scores that were previously validated in specific populations, and to assess their correlation with computed tomographic measurement of pulmonary aeration in a population with different pathologies. Hypothesis: The "Loss of Aeration Score" will be more accurate than a simplified version and another widely used score, the "Lung Ultrasound Score".

Completed4 enrollment criteria

Follow-up at School-age of Children Who Participated in the Efficacy Study of Nitric Oxide for Premature...

PrematurityRespiratory Distress Syndrome,Hypoxemia

Our previous data demonstrated that premature infants treated with inhaled nitric oxide at birth had improved neurodevelopmental outcomes at two years corrected age. We now wish to determine whether this benefit continues through school age.

Completed2 enrollment criteria
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