View clinical trials related to Hypoxia.
Filter by:The goal of this clinical trial is the acquisition of photoplethysmography signals during periods of profound hypoxia. The study is designed in accordance with ISO 80601- 2-61,2ed:2017-12 & 2018-02.
The incidence of hypoxemia during gastrointestinal endoscopy sedation is high, but there is still a lack of perfect prediction model of hypoxemia, which often leads to unpredictable respiratory complications. In order to ensure the safety of gastrointestinal endoscopy sedation and make emergency plans in advance, a better diagnostic model is urgently needed to help assess the risk of hypoxemia in patients undergoing the process and make early intervention measures. Facial photography is a simple and feasible measure that can show the facial soft tissue and structure of bone. The purpose of this study is to explore whether facial photography combined with other clinical indicators can build a prediction model of hypoxemia during gastrointestinal endoscopy sedation.
Intravenous anesthesia has been widely used in endoscopic retrograde cholangiopancreatography (ERCP). In the past decade, many practices have been carried out under the propofol-based monitored anesthesia care without endotracheal intubation in patients undergoing ERCP. Ciprofol is a newly developed intravenous anesthetic with a potency 4-5 times than that of propofol. Ciprofol seems a promising anesthetic agent for intravenous anesthesia but the evidence supported its application in ERCP is still limited.
The study is looking at how myeloma is related to low oxygen levels (hypoxia) in the bone marrow. This is to understand the disease better. It might also guide treatment in the future. For the study, we will run tests on a portion of the samples taken during a bone marrow biopsy. A bone marrow biopsy is taken as part of the diagnosis or follow up of myeloma. The tests in our study will look closely at the make-up of immune cells in the bone marrow, highlight areas of low oxygen, and look at genetic changes in cells from low-oxygen areas. We will ask patients to take a capsule the day before their bone marrow biopsy containing pimonidazole hydrochloride, a substance which will show up areas of low oxygen on tests. Overall we want to know: 1. If myeloma cells 'live' in areas of low oxygen in the bone marrow 2. What are the immune and bone marrow cells which are neighbours of myeloma cells? 3. Are there genetic changes in low oxygen myeloma cells For the pilot study, we want to know: 4. Can we use new techniques to study questions 1-3? The techniques we want to use are pimonidazole with multiplex immunohistochemistry and single cell RNA sequencing. The information we get from the tests will help us get a better understanding of how myeloma works. Future studies may also use these results to develop new kinds of drugs for myeloma.
Hypoxia is a common adverse event during sedated hysteroscopy for assisted reproduction, and it is more likely to occur in overweight or obese patients. In sedated gastroscopy, the incidence of hypoxia with remimazolam is lower than that with propofol. The present study is a single-center, randomized, single-blind, controlled clinical trial. Overweight or obese patients undergoing sedated hysteroscopy for diagnosis and treatment, with ASA grade I or II, were selected as subjects and randomly divided into an experimental group and a control group, with 300 subjects in each group. Sedation induction and maintenance are performed using remimazolam or propofol combined with remifentanil, respectively, to compare the incidence of hypoxia during surgery between the two groups of patients.
The aim of this study is to describe the effect of the Inogen Rove 6 Portable Oxygen Concentrator on peripheral oxygen saturation in adults receiving supplemental oxygen at night and examine whether the device can adequately maintain oxygen saturation during sleep.
This study will apply novel MRI approaches with established sensitivity to tissue oxygen consumption and perfusion to predict hypoxia-associated radiation resistance, manifested as tumor recurrence and progression post-treatment.
This prospective, blinded observational clinical study was aimed to determine the effect of hyperhydration and muscle loss measured by Bioelectrical impedance vector analysis (BIVA) on mortality. The aim was to compare hydratation parameters measured by BIVA: OHY, Extracellular Water (ECW) / Total Body Wate (TBW) and quadrant, vector length, phase angle (PA) with cumulative fluid balance (CFB) recording (input-output) in their ability in predicting mortality as the abilities of the prognostic markers PA (BIVA), Acute Physiology and Chronic Health Evaluation II (APACHE II - score) and presepsin (serum Cluster of Differentiation (CD) 14-ST). The investigators also compared BIVA nutritional indicators (SMM, fat) with BMI and laboratory parameters (albumin, prealbumin and C-reactive protein (CRP) inflammation parameters) in the prediction of mortality. An important goal was to evaluate the usability of the BIVA method in critically ill patients on extracorporeal circulation, to compare the impedance data of the extracorporeal membrane oxygenation (ECMO) and non-ECMO groups.
The goal of this prospective multi-centre randomised controlled trial is to determine if addition of awake prone positioning to standard oxygen, high flow oxygen therapy and non-invasive ventilation may reduce the rates of endotracheal intubation and mechanical ventilation.
Hypoxic-ischemic encephalopathy is the most common cause of neurological damage in the neonatal period. It has an incidence of about 1.5-2.5% of livebirths in developed countries. It is associated with a high rate of mortality and morbidity. Major neurological outcomes such as cerebral palsy, mental retardation, learning disabilities, epilepsy occur in approximately 25% of survivors. The diagnostic and prognostic tools currently available for enrollment have limitations and additional reliable biomarkers are needed for all phases of clinical management. Sarnat staging has taken on a role in identifying those infants who may benefit from treatment of hypothermia, resulting in the need for neurological evaluation and staging within 6 hours of life. Therapeutic hypothermia is still the best therapeutic treatment. A new tool in neuroscience research is represented by micro-ribonucleic acid (microRNA) profiling. The presence of microRNAs in blood, urine and saliva and the ability to measure their levels non-invasively has opened new doors in the search for peripheral biomarkers for the diagnosis and prognosis of neurodegenerative diseases and also as possible pharmacological targets. The aim of the present study is to analyze a specific cluster of miRNAs selected from data obtained by macroarray (NGS Pannel) on the entire microRNAome in healthy newborns with normal cord arterial pH value (7.26-7.35) as control cases and in newborns with fetal metabolic acidosis with a pH threshold value lower than 7.12 of the blood gas analysis from cord arterial blood. This latter group will be further stratified into two groups, neonates who will practice therapeutic hypothermia according to current guidelines and a further group who will not practice therapeutic hypothermia. This study will make a further international contribution in evaluating and identifying the potential of microRNAs as diagnostic and prognostic biomarkers in perinatal asphyxia and hypoxic ischemic encephalopathy. Furthermore, the study aims to identify specific microRNA sequences as new possible markers to be used as an additional parameter for the enrollment of therapeutic hypothermia, especially in cases of mild hypoxic-ischemic encephalopathy.