Active clinical trials for "Hypoxia"

This study to assess the oxygen saturation accuracy of the Beddr SleepTuner in profound hypoxia.

The aim of this project is to test the accuracy of pulse oximeters during mild, moderate and severe hypoxia. This is done by comparing the reading of the pulse oximeter during brief, steady state hypoxia with a gold-standard measurement of blood oxyhemoglobin saturation (arterial blood sample processed in a laboratory hemoximeter). The data obtained is submitted by pulse oximeter manufacturers to the FDA for device approval.

The investigators' goal is to perform an observational cohort study investigating the use of oxygen reserve index (ORi) in patients undergoing elective thoracic surgery and one-lung ventilation (OLV). For this purpose, ORi values are recorded and compared to the other collected hemodynamical and oximeter parameters. The primary hemodynamic parameters include heart rate (HR) and blood pressure (BP), while; oximeter device-related parameters include peripheral oxygen saturation, perfusion index (PI), and pleth variability index (PVI). The investigators' secondary goal is to investigate relationships between these hemodynamical and oximeter parameters using statistical analysis methods.

Hemodialysis patients may experience drops in blood oxygen saturation during the hemodialysis treatment, which may lead to hypoxia in the tissues. The investigators hypothesize that: The cumulative number, severity, or other characteristics of such deoxygenation episodes may be a predictor of adverse outcomes in hemodialysis patients. There may be demographic, anthropometric, clinical, treatment prescription, lab analytical, and other parameters that correlate with the number and severity of deoxygenation episodes and, therefore, may be used for risk stratification. Further, some of these parameters may be modifiable.

Study to evaluate the %SpO2 accuracy performance of the Nonin Medical pulse oximetry systems.

An assessment of early management of moderate-severe ARDS in the United States, including ventilator management and use of rescue therapy.

The purpose of this research study is to determine if a chemical marker in the blood, hypoxia-inducible factor (HIF-1 alpha), can be used to predict subject's hospital outcomes when the subject is diagnosed with sepsis. Sepsis is defined as either the presence of pathogenic organisms or their toxins in the blood and tissues. Sepsis is one of the most significant challenges in critical care medicine. The investigators propose that hypoxia-induced expression of HIF-1 alpha will correlate with the clinical features of Sepsis and in the future, HIF-1 alpha may be used as a biomarker in Sepsis.

In endotracheal intubation, it is essential that the trachea is intubated and not the esophagus. In suboptimal situations (outside an operating theatre), malpositioning of the endotracheal tube occurs frequently and is often fatal. The diagnostic tools that are available in the operating theatre are not appropriate for out-of-hospital situations because of several reasons. Moreover, these methods mostly take some time to provide the desired information and don't have optimal specificity and sensitivity. In order to allow fast diagnosis of this potentially fatal complication, we have developed a fully-automatic detection device to diagnose endotracheal tube malpositioning within 2 seconds. A high sensitivity/specificity of the algorithm for waveform-analysis was demonstrated in healthy patients and patients with pulmonary diseases (decreased pulmonary compliance). A new stand-alone device with integrated sensors and microprocessor was developed that gives immediate diagnosis, and stores data for subsequent research purpose. This device will be evaluated in perioperative situations to demonstrate the high sensitivity and specificity in patients in a clinical setting.

The brain is such a metabolically active organ that it consumes about 20% of oxygen burned every minute by an average adult even though it only contributes about 2% of the body weight. As a result, the brain produces a disproportionately high amount of CO2 every minute in comparison with the rest of the body.

The purpose of this study is to compare lactate and total acid-base status in fetal scalp blood with lactate and total acid-base status in maternal blood and amniotic fluids to provide information on how lactate and base deficit correlates with scalp samples. Furthermore, the investigators want to study whether angiogenic factors in fluids above may be a possible marker of asphyxia during labor.