View clinical trials related to Hypoxia.
Filter by:The objective of the present study is to determine whether intermittent hypoxia protects against ischemia-reperfusion injury in young and older healthy individuals. The investigators hypothesize that intermittent hypoxia will attenuate the reduction in flow-mediated dilation following ischemia-reperfusion injury.
The purpose of this study is to investigate the impact of rapid elevation to 3,800 meters on the cognitive function of low-altitude residents through a plateau field and plain control study, and explore the objective indicators related to the impaired cognitive function.
The study aimed to evaluate different preoxygenation methods (tidal volume for 3 minutes and 4 deep breaths) in pregnant women with oxygen reserve index (ORI). After the routine monitoring of healthy ASA II pregnant patients between the ages of 18-45, different preoxygenation methods will be applied, and the oxygen status of the patients will be compared with ORI monitoring.
A total of 40 ASA (American Society of Anesthesiology) physical status I-III who underwent lumbar disc hernia repair for one or two levels were included in this prospective study. A standard anesthesia protocol was performed in all patients. Routine intraoperative monitoring consisted of electrocardiography, automatic noninvasive arterial blood pressure, pulse oximetry, capnography, and cerebral tissue oxygen saturation through NIRS.Patients' demographics such as age, gender, height, weight, BMI, smoking status and pre-existing medical conditions were recorded.The patients were allocated equally to two groups according to BMI as Group I: BMI ≥30kg/m2,Group II <30 kg/m2.
Obesity is characterized as a low-grade systemic inflammatory disease, which changes several pro-and anti-inflammatory cytokines. The practice of physical activity is a non-pharmacological method that results in the reduction of the systemic inflammatory state and, when associated with hypoxia exposure, may substantially improve this state. Deep-water running is highly indicated to obese for guarantee less joint impact and lower fatigue levels. In this way, the high-intensity exercise associated with intermittent recovery hypoxia in obese women will be investigated.
Remote Ischemic Conditioning has never been studied in neonates with HIE. However, RIC has been studied in animal models of perinatal asphyxia and has shown encouraging results. In neonatal rats with HIE, RIC is associated with reduced sensory motor deficits compared to non-RIC, and repeated cycles in three consecutive days is superior to a single treatment. In piglets, four cycles of 10 minutes of bilateral hindlimb ischemia immediately after bilateral common carotid occlusion results in reduced cell death in the periventricular white matter and internal capsule. These preclinical studies support the hypothesis that RIC may be beneficial in infants with HIE.
The purpose of this clinical study is to validate the oxygen saturation (SpO2) accuracy of the RDS MultiSense® Pulse Oximetry during non-motion conditions over the range of 70-100% arterial oxygen saturation (SaO2) as compared to arterial blood samples assessed by measuring carbon monoxide (CO) bound to hemoglobin by CO-Oximetry. Additionally, data will be collected for heart rate accuracy as compared to reference ECG. The end goal is to provide supporting documentation for the SpO2 and heart rate accuracy validation for RDS MultiSense® Pulse Oximetry. A minimum of 10 healthy adult male and female participants, ranging in age and pigmentation from light to dark, will be enrolled in the study to meet the study design requirements defined by International Organization for Standardization ISO 80601-2-61:2017: corrected version 2018-02 and by the FDA's Guidance for Pulse Oximeters (March 4, 2013). The participants will have an arterial catheter placed in the radial artery to allow for simultaneous blood samples during stable plateaus of induced hypoxic levels. The investigational device will be placed on the placed on the thorax of the participants (patch on the upper back and external electrode on the right pectoral) per the instructions for use. Simultaneous data collection will be set up for the system under test and control oximeter.
Coronary artery bypass grafting (CABG) with cardiopulmonary bypass is a common surgical therapy for patients suffering from coronary artery diseases. The heart is subjected to a long period of ischemia due to the occlusion of the aorta. The heavy burden of myocardial ischemia-reperfusion injury (IRI) thus induces cardiomyocyte death, which can paradoxically reduce the beneficial effect of CABG. Preconditioning by moderate hypoxia or hyperoxia serves as an effective drug-free method to increase the organism's resistance to negative effects, including IRI.
This project aims to test the accuracy of pulse oximeters during mild, moderate, and severe hypoxia, i.e., a range of arterial HbO2 saturation from 100 down to 70%. A typical study will include at least ten subjects (at least 200 necessary data points to meet the ISO 80601-2-61:2017).
Patients undergoing sedated bronchoscopy were randomized into six groups (10 Liters/minute [L/min], 20 L/min, 30 L/min, 40 L/min, 50 L/min, 60 L/min). The primary outcome was the incidence of hypoxemia.