Active clinical trials for "Hypoxia"

Burden: Pneumonia remains the leading infectious cause of death accounting for 920,000 children under five around the world. This means a loss of over 2,500 child lives every day, or over 100 every hour. Since 2000, the number of child deaths caused by pneumonia has decreased by 47 percent. The tremendous progress made is due in part to the rapid roll-out of vaccines, better nutrition, and improved care-seeking and treatment for symptoms. However, pneumonia hasn't declined as quickly as other diseases such as malaria (58%), HIV/AIDS (61%), and measles (85%). Knowledge gap: The Lancet Series on Childhood Pneumonia and Diarrhea has reported that case management is one of the three most effective interventions to reduce pneumonia deaths in children. It is also noted that the cost-effectiveness of these interventions in the national health system needs urgent assessment. It was suggested to find out means to reduce hospital stay without compromising the quality of care. Relevance: The main purpose of the study is to compare the efficacy of two doses of parenteral Amoxicillin plus single-dose Gentamicin compared to four doses of parenteral Ampicillin plus single-dose Gentamicin. After 72 hours of treatment injectable Amoxicillin or injection Ampicillin will be switched to or replaced by oral Amoxicillin and will be discharged with an advice to attend to Ambulatory Care Unit (ACU) to receive a once-daily dose of injection Gentamicin for a total of 5 days. It is anticipated that this modified therapy will reduce the hospitalization stay of children with severe pneumonia and would therefore be relevant in countries with the resource-poor settings. By reducing the hospitalization period, this therapy has the potentials to reduce hospital-acquired infection. Hypothesis (if any): Rate of treatment failure with two doses of injectable Amoxicillin plus single-dose Gentamicin will be no more than that of four doses of injectable Ampicillin plus single-dose Gentamicin in the management of children between 2 months to 59 months hospitalized for WHO classified severe pneumonia.

This is a study to validate the efficacy of using a small portable oxygen source to mitigate altitude-induced hypoxia.

The purpose of this study is to evaluate the effect of breathing a slightly reduced amount of oxygen will have on a rescuer's ability to provide chest compressions during CPR.

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: If myeloma cells 'live' in areas of low oxygen in the bone marrow What are the immune and bone marrow cells which are neighbours of myeloma cells? Are there genetic changes in low oxygen myeloma cells For the pilot study, we want to know: 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.

Pathological erythrocyte aggregation reduces capillary perfusion and oxygen transfer to tissue. The aggregation is determined by opposing forces, the repulsive force between cells, cell-to-cell adhesion induced by plasma fibrinogen, and the disaggregating shear force generated by blood flow. The investigators investigate how hypoxic exercise affects intrinsic/extrinsic factors of aggregation. Sixty sedentary males were randomly assigned into either hypoxic (HE; FiO2=15%, n=20) or normoxic (NE; FiO2=21%, n=20) training groups for 30 min·d-1, 5 d·wk-1 for 6 weeks at 60% of maximum work rate or to a control group (CTL; n=20). A hypoxia exercise test (HET, FiO2=12%) was performed before and after the intervention. The erythrocyte aggregation, binding affinity of fibrinogen and membrane biomarkers were determined by an ektacytometry and flow cytometry, respectively.

The aim of this study is to characterize the protective pattern of intermittent hypoxia, angina pectoris and remote ischemic conditioning, in reperfusion injury by determining and monitoring the plasma immunometabolic parameters of patients with STEMI. This could contribute to better understanding of this phenotypic pattern with translation into clinical practice.

The purpose of this study is to determine the effects of isolated chronic exercise in hypoxia and combined exercise in hypoxia with a low carbohydrate diet on hypoxia-induced transcription factor (HIF1-α); glycaemic control and cardiovascular risk factors in patients with type 2 diabetes.

The aim of this study is to evaluate the preliminary safety and performance of a low-cost locally-made Venturi-based Non-invasive Positive Pressure Ventilator (NIPPV) device for hypoxemic COVID-19 patients. The device administers Continuous Positive Airway Pressure (CPAP) therapy using the jet-mixing or Venturi effect to increase the volume flow rate of oxygenated air from a pressurized cylinder by entraining the atmospheric air. To provide CPAP therapy, this high flow of oxygenated air is delivered to the patient via a low-cost non-vented mask with a tight seal with a High-Efficiency Particulate Air (HEPA) filter connected to the exhalation limb. The tight seal and HEPA filter ensures a minimal risk of aerosol generation and thus the device can be used without a negative pressure room. The system consists of the developed Venturi-based flow-generator, a standard 22mm breathing tube, a standard Y-connector, a non-vented CPAP mask (e.g., snorkel mask, helmet), a HEPA filter, and a Positive End Expiratory Pressure (PEEP) valve. The bench-top testing of the device is done in the laboratories of BUET and was verified that the device performs within the CPAP guidelines provided by the Medicines and Healthcare products Regulatory Agency (MHRA), UK. This study aims to assess the safety of and efficacy of the device in three different steps: (1) design validation, (2) clinical feasibility and (3) pilot clinical trial for safety and efficacy evaluation. Only if the device successfully passes the parts 1 and 2, the investigators will proceed to the final clinical trial in step 3. In this final step, the investigators aim to conduct a randomized controlled trial (RCT) evaluating for non-inferiority of the CPAP intervention compared to standard HFNO treatment. The number of ventilator-free days will be used as the primary outcome for efficacy, while patient recovery, death, or need of intubation and other adverse events will be used as secondary outcomes.

To study the effect of acute normobaric hypoxia during exercise in patients with pulmonary hypertension on blood markers (serum markers of iron and red blood cell homeostasis and micro-RNAs known to be associated with PH).

Stillbirth (SB) is a devastating complication of pregnancy and contributes to over 2 million deaths globally every year. Over 20 million infants are born every year with low birth weight (LBW), which is associated with a twenty times increased risk of death in the first year of life and high rates of short- and long-term illnesses. Sleeping on one's back during pregnancy has recently emerged as a potential risk factor for LBW and SB in the medical literature. In high-income countries, SB rates have mostly remained the same in the past two decades and targeting modifiable risk factors could help reduce the number of SB and LBW in the population. When a pregnant woman sleeps on her back, her body position compresses underlying blood vessels and reduces blood flow to the developing baby. This body position could cause unpleasant symptoms for the mother and result in LBW or SB of her baby. Lying on her side or with a slight lateral tilt helps relieve this compression. One way to keep people off their back while sleeping is by using positional therapy (PT). It is a simple, safe, inexpensive and effective intervention for preventing people who snore or people who's breathing pauses during sleep from sleeping on their back. Reducing the amount of time pregnant women sleep on their back could help reduce SB and LBW rates. The investigators developed a PT device (PrenaBelt) and tested it in three clinical trials, which demonstrated that it significantly decreases the number of time women spend sleeping on their back. Using feedback from our previous research, the investigators developed five additional devices that will be tested in this study. The purpose of this study is to evaluate the new PrenaBelt (PB2) prototypes' ability to reduce the amount of time pregnant women sleep on their backs in the third trimester of pregnancy, validate the Ajuvia Sleep Monitor, and collect feedback on the devices. Demonstrating that the sleeping position of pregnant women can be modified through the use of a simple, inexpensive PT intervention may be one of the keys to achieving significant reductions in LBW and late SB rates in Australia and worldwide.