View clinical trials related to Hypoxia.
Filter by:Acute type A aortic dissection is often accompanied by postoperative hypoxemia, the cause of which is not fully understood. Angiotensin II is an important component of the renin-angiotensin system (RAS), which has been suggested to be involved in the development of aortic dissection and pulmonary inflammation.The purpose of this study was to investigate the role and mechanism of angiotensin II pathway in postoperative hypoxemia after acute type A aortic dissection, and to provide reference for clinical application
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.
To determine whether high-flow nasal cannula oxygen can reduce the incidence of hypoxia during the procedure of sedated hysteroscopy.
In line with the ever-growing aging of Western populations, the development of preventive strategies to slow down the effects of aging on cardiovascular health represents a major challenge in order to preserve functional capacities and a sufficient quality of life in the elderly. The alteration of vascular function (at the cerebral and systemic level) with aging is an important feature in the clinical picture including a decrease in physical and cognitive capacities. Although physical activity is recognized as an essential means of combating the effects of aging, optimizing its effects by defining the most effective strategies of practice remains a key objective. Offering alternative interventions to exercise training is also necessary for people who are unwilling or unable to engage in a physical activity program. In this context, hypoxic conditioning, alone or in conjunction with rehabilitative exercise training, is a new therapeutic modality with strong preclinical validity, in particular from a cardiovascular standpoint, and used in other pathologies to improve cardiovascular function and exercise performance and quality of life. Our aim is, therefore, to investigate the effect of hypoxic conditioning (alone or in conjunction with exercise training) on cerebrovascular health in the elderly.
In this clinical study, the investigators will compare vital parameters measurements obtained using continuous data from reference monitors and continuous wireless MultiSense® monitoring patch in 30 healthy volunteers under induced and controlled hypoxia.
The overall incidence of good outcome for AIS following endovascular treatment is only proximately 50%. Whether NBO was safe and effective to improve acute ischemic stroke prognosis is still unclear. The investigators' hypothesis is thatNBO is a safe and effective strategy to improve longterm outcome in AIS patients undergoing endovascular treatment.
This is a randomized, placebo-controlled, crossover study of Trans Sodium Crocetinate (TSC) in healthy volunteers, age 18-40 (inclusive), exercising at altitude. The primary objective is to determine the effect of (TSC) on partial pressure of oxygen (PaO2) and maximal oxygen consumption (VO2 max); the secondary objective is to assess the effect of TSC on oxygen saturation (SpO2).
Hypoxia is the most common adverse event in gastrointestinal endoscopes sedated with propofol and sufentanil, especially in elderly people. The aim of this randomized study was to determine whether intervention based on additional capnographic monitoring reduces the incidence of hypoxia in gastrointestinal endoscopes procedures for elderly patients.
Patients with locally advanced cervical cancer (LACC) are primarily treated with radiotherapy +/- chemotherapy however 5-year survival rates are <60% with significant treatment toxicity. Hypoxia is a well-known radioresistant component of solid tumours such as cervical cancer and hypoxia modification therapies have demonstrated immense promise in treating such tumours. A major factor in determining a successful outcome with hypoxia modification is appropriate patient selection as it is hypoxic tumours that receive the most benefit from hypoxia modifying therapies. To date there is no validated hypoxia biomarker to stratify patients for therapy in cervical cancer in clinical use. This project offers a unique opportunity to examine both genetic and imaging biomarkers to optimise patient stratification when receiving curative radiotherapy for cervical cancer.
The study presents an alternative method of tracheal dilatation in pediatric patients with acquired tracheal stenosis. Dilatation is performed by the use of balloon catheter connected with manometer, that is bronchoscopic guided into trachea in the stenotic area, through the wide canal of supraglottic device i-Gel. Every dilatation cession consists of three consequent tracheal balloon dilatations of maximum 3 minutes duration each, followed by 10-15minutes interval of controlled ventilation. The balloon is inflated for 60 seconds to reach predefined pressure, and then deflated. This method is minimal traumatic for tracheal mucosa, and application of several dilatation procedures every 2-3months, in pediatric patients with acquired tracheal stenosis, may lead to a relative reopening of trachea and recession of clinical symptoms.For the right performance of the dilatation procedure, patients receive general anesthesia with cessation of spontaneous ventilation. During procedure, controlled ventilation-oxygenation is impossible, because the i-Gel canal is occupied by bronchoscope and balloon catheter, so patients will remain apneic for a short period of time. For pediatric patients is important to perform proper preoxygenation prior to procedure, and to maintain oxygenation as long as possible during procedure. This is achieved by application of apneic oxygenation, through a small catheter, connected to high flow oxygen. Participants are exposed during first dilation to no oxygenation, while during second and third dilatation to apneic oxygenation. Aim of the study is to investigate primarily whether application of apneic oxygenation, in pediatric patients during tracheal balloon dilatation, maintains regional cerebral oxygen saturation rSO2 in significant higher levels, compared with no application of oxygenation. rSO2 levels are a sensitive index of oxygenation efficacy of the brain, accordingly this refers to a safe procedure. Secondary issues are whether application of apneic oxygenation maintains pulse oximetry SpO2 and artierial oxygen partial pressure PaO2 in higher levels, and what are the effects on arterial carbon dioxide partial pressure PaCO2 and on haemodynamic parameters (heart rate, blood pressure), compared with no application of apneic oxygenation.