Active clinical trials for "Hypoxia"

Intermittent episodes of hypoxemia and/or bradycardia, also defined as cardio-respiratory events (CRE) are very frequent in preterm infants and may result in transient hypoxia and hypoperfusion of target organs, with possible clinical implications. The hemodynamic instability that characterizes the first 72 hours of life, also called as transitional period, place preterm infants at high risk of complications and may contribute to enhance fluctuations in end-organ perfusion and oxygenation induced by CRE. In this study we aimed to explore cardiovascular and cerebrovascular changes determined by different CRE types in preterm infants during the transitional period.

Testing the absolute accuracy of the Masimo O3 regional oximeter in reading somatic tissue oxygenation in healthy volunteers under controlled hypoxia.

To determine whether the use of oxygen hoods as compared to conventional high-flow oxygen delivery systems, and the effects on oxygenation, mechanical ventilation and mortality rates in hypoxic patients with COVID-19.

This study will investigate the impact of the Double-Trunk Mask (DTM) on the reduction of oxygen titration in patients with severe hypoxemia.

To test the accuracy of a non-invasive blood oxygen saturation monitor which is placed on a subject with profound hypoxia.

AIM: We propose an innovative approach using Lifelight® smart technology that will enable the continued provision of high level patient care at the same time as reducing pressure on nursing and equipment resources. METHOD : Lifelight® is a computer program ("app") which can be used on smart devices that contain a camera. It is able to measure all of the vital signs by measuring very small changes in skin colour that occur each time the heart beats. This means that it does not need to touch the patient. We believe this could be an effective way of measuring vital signs, especially during the COVID-19 pandemic when prevention of cross-contamination between patients is essential. Patients are also likely to be reassured by a contactless approach. During this study, we will recruit two groups of people who are hospitalised with an acute illness. The first group will be people expected to have abnormal blood oxygen levels such as those with acute respiratory problems including those with COVID-19. The second group will be people expected to have abnormal blood pressure. These Lifelight vital signs will be compared to measurements from standard clinical equipment. The exact number of participants recruited will depend on how quickly the app "learns" and how many of the vital signs collected are outside of the normal range. For the first group of participants, we will use a camera to collect data about the changes in their face and use this to teach the app how to measure blood oxygen level and also to check how well the app measures blood oxygen level, heart rate and respiratory rate. For the second group of participants, we will use a camera to collect data about the changes in their face to check how well the app measures blood pressure and respiratory rate. All of the data will be kept secure and participants will not be able to be identified.

Inhaled nitric oxide is a widely accepted standard of care for pulmonary hypertension, and has been studied in the context of cardiac surgery. CPB during cardiac surgery induces systemic inflammatory response and ischemic-reperfusion injury of many organs. Nitric oxide added to the bypass circuit may have anti-inflammatory effect and has shown the potential to ameliorate organs' injury . There is evidence that the delivery of nitric oxide to the oxygenator gas flow during pediatric CPB is accompanied by a reduction in myocardial injury markers' levels in the postoperative period. In adults, NO supply to the CPB circuit during CABG exerted a cardioprotective effect and was associated with a lower level of inotropic support and cardio-specific blood markers . To our knowledge, this is the first trial to assess whether artificial nitric oxide supplementation to the CPB-system reduces the incidence of hypoxemia after cardiac surgery.

The trial investigates changes in metabolism during high altitude expedition up to 6865m. A mass-spectrometry based platform is used to detect different oxidative stress related metabolites. Symptoms of acute mountain sickness are evaluated and correlated with laboratory parameters.

The aim of this study is to determine the efficacy of therapeutic hypothermia following perinatal asphyxia on neurological and neuropsychological outcomes and also to assess academic attainment and any additional health, societal or educational costs associated with changes in outcome as a result of the intervention. This study will determine whether the apparent initial benefits of cooling are maintained in the longer term. Perinatal asphyxia (a lack of oxygen occurring around the time of birth) may have long term consequences on brain functioning, which may be altered by treatment with hypothermia (cooling). Currently, there is no information on the effect of cooling on outcome beyond 18 months of age. We intend to assess at 6 - 7 years of age, the children that participated in the TOBY trial of whole body cooling following perinatal asphyxia and compare between the children that had received the cooling treatment soon after birth and those that were not treated with cooling, the number that survived with an intelligence quotient (IQ) greater than 84, the presence and severity of disabilities, educational attainment and the economic impact on families and service providers. If possible, children will be assessed in their school, with the option of alternative venues such as home or clinic if required. During the assessment a paediatrician will conduct a neurological examination. A psychologist will administer psychometric tests to evaluate cognitive, behavioural and motor development. Questionnaires completed by parents and teachers will complete the data collection. Economic factors will also be assessed in the parent questionnaire. Each child will have contact with the assessors during one school day with appropriate breaks. Assessments will take place over a period of 3 years.

The inner retina is crucially dependent on an adequate retinal blood supply. When the retina becomes ischemic and hypoxic this results in severe vision loss due to retinal neovascularization. Measurement of retinal blood flow and retinal oxygenation is, however, still a difficult task. Information on retinal oxygenation is almost unavailable from human studies. In the present protocol the investigators propose a procedure allowing for the measurement of retinal blood flow, retinal oxygenation and retinal oxygen extraction by combining a number of innovative techniques. Specifically, retinal vessel diameters will be measured with a Retinal Vessel Analyzer, retinal blood velocities with bi-directional laser Doppler velocimetry and retinal oxygenation with spectroscopic evaluation of retinal fundus images. This will allow for the calculation of retinal oxygen extraction, a fundamental parameter of retinal function. Up to now, no data for retinal oxygen extraction are available in the literature.