View clinical trials related to Hypoxia.
Filter by:To study the effect of acute normobaric hypoxia during exercise in patients with pulmonary hypertension with/without Sildenafil
Patients with COVID-19 may suffer from profound hypoxia, requiring the use of supplemental oxygen at high concentrations and flow rates. Non-invasive oxygen delivery systems such as high-flow nasal cannula and non-invasive ventilation have been used in an attempt to avoid the need for intubation and invasive mechanical ventilation. These systems consume large amounts of oxygen, which prevents them from being used in areas without high pressure oxygen sources. In addition, they generate aerosols which have the potential to spread infectious pathogens from the patient's respiratory tract to healthcare workers or other patients in the environment. This study aims to investigate a computer controlled rebreather system which functions to maintain a high fraction of inspired oxygen while minimizing the production of aerosol, among hospitalized patients requiring respiratory support due to hypoxemia. The Revoxa Oxygen Rebreather device can reduce the amount of wasted oxygen and can reduce the potential for any exhaled pathogens entering the surroundings. This type of breathing device is a promising oxygen delivery treatment, but it is not clear if it can offer comparable results to standard treatment. The purpose of this study is to compare the Revoxa Oxygen Rebreather device to standard oxygen delivery methods, including nasal cannula and face mask oxygen, in order to see if similar oxygenation can be achieved at comparable or lower rates of oxygen usage.
To study hemodynamic effects of acute normobaric hypoxia during exercise in patients with pulmonary hypertension in a single-center randomized controlled trial.
To study the effect of acute normobaric hypoxia during exercise in patients with pulmonary hypertension with/without Sildenafil
Vital signs of postoperative patient are monitored intensively in post-anesthesia care unit or intensive care unit, but the frequency of surveillance decreases in typical surgical wards. The continuous pulse oximetry in surgical wards is known to be useful in detection and prevention of hypoxemia, reducing complications caused by postoperative respiratory depression. However, continuous monitoring is not conducted, due to shortage of equipment and personnel. Recently, wearable device for measuring pulse oxygen saturation, which is inexpensive, applicable to patients with mobility, and can be monitored continuously through wireless connection, has been supplied. In this study, the investigators evaluate the effect of continuous monitoring of oxygen saturation with wireless device(MASIMO Radius-7) on postoperative patients who are transferred to general wards, and evaluate the effect of early intervention in reducing the event of hypoxemia.
The dearth of Intensive care units in low resource settings portends for poor outcomes amongst patients with acute hypoxemic respiratory failure (AHRF) . To our knowledge, the effect of CPAP and HFNC on major outcomes has not been assessed in adults with AHRF in resource-limited settings. The aim of this prospective, multicenter, randomized, controlled, trial is to determine whether High-flow oxygen through a nasal cannula (HFNC) or Continuous positive airway pressure (CPAP) system can reduce mortality among patients with acute hypoxemic respiratory failure (AHRF) in a limited resource setting as compared with standard low flow oxygen therapy?
The use of acute intermittent hypoxia (AIH) has been examined in animal and human studies to gain an understanding of its effect on spinal excitability and synaptic strength. Subsequently, the investigators have learned that the use of AIH results in new protein formation and spinal plasticity. The use of acute intermittent hypoxia demonstrates a potential for therapeutic utilization in individuals with neurologic injuries. However, little is known about the effect of AIH in healthy individuals. This work is necessary to understand the mechanisms of AIH-induced plasticity. As such, this research study seeks to evaluate the impact of a single session AIH on upper extremity motor function in healthy individuals.
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.
Coronavirus disease 2019 (COVID-19) is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and in infected patients, it produces symptoms which range from completely asymptomatic to those expressing severe illness. Early recognition of those developing severe manifestations allows for rapid and appropriate intervention, including admission to intensive care unit and intensive care therapy, such as mechanical ventilation. A current problem is that only limited data exist predicting the clinical course of COVID-19. This study will determine whether non-invasive urinalysis is useful in assessing and predicting the severity or clinical course of patients with COVID-19.
The purpose of the study is to assess whether lung ultrasound is able to detect lung injury after lung resection surgery.