View clinical trials related to Hypoxia.
Filter by:This study involves the administration of a hypoxia marker, pimonidazole hydrochloride, taken orally approximately 24 hours before surgical resection of a pancreatic tumor in order to identify areas of lower oxygen content on tumor samples.
Purpose of Study This exploratory clinical study will investigate FMISO (fluoromisonidazole) in patients with (1) newly diagnosed primary malignant brain tumors (WHO [World Health Organization] Grade III or IV glial-based tumors) who have not had a complete surgical resection and by contrast MRI (Magnetic resonance imaging) have residual tumor > 1.0 cm in diameter and will be receiving radiotherapy or (2) newly diagnosed brain metastasis (> 1.0 cm in diameter who will be receiving radiotherapy. The ability to accurately assess tumor hypoxia and accurately determine the amount/degree of tumor hypoxia could potentially change patient management once validated as tumor hypoxia is known to be associated with a poor prognosis [Eyler 2008].
The purpose of this study is: 1. To study the effect of whole-body vibration on partial pressure of oxygen in arterial blood (PaO2), under hypobaric hypoxic conditions. 2. To study the effects of whole-body vibration and hypobaric hypoxia on visual contrast sensitivity. 3. To se if there is an increase in cytokines and other biomarkers under different hypobaric hypoxic conditions Our main hypothesis is that whole-body vibration may cause PaO2 to drop to a lower level, at a given altitude; than would be the case if there were no vibration present.
Tuebingen High Altitude Ophthalmology Study to investigate the effects of high altitude on retinal structure and function as well as anterior chamber in regard to acute mountain sickness.
The main purpose of this study is to determine if a drug (acetyl-cysteine or ACCY) can increase the amount of oxygen in your body at a high altitude of 11,500 feet. ACCY is approved by the Food and Drug Administration (FDA) as a treatment or antidote for Tylenol overdoses. Other forms of ACCY are also sold over-the-counter as nutritional supplements. In this study, the FDA-approved form of ACCY will be used "off-label" (meaning in a way not approved by the FDA). This study is being conducted by researchers from the United States Army Research Institute of Environmental Medicine (USARIEM). The study will take place in the Altitude Chamber located in the basement of USARIEM. A total of approximately 30 volunteers (men and women, military and civilians) will take part in the study. They can expect to be in the study for a minimum of a few hours each day for two weeks. The investigators hypothesize that ACCY will improve ventilation and oxygenation while at altitude.
The Optimizing Cooling trial will compare four whole-body cooling treatments for infants born at 36 weeks gestational age or later with hypoxic-ischemic encephalopathy: (1) cooling for 72 hours to 33.5°C; (2) cooling for 120 hours to 33.5°C; (3) cooling for 72 hours to 32.0°C; and (4) cooling for 120 hours to 32.0°C. The objective of this study is to evaluate whether whole-body cooling initiated at less than 6 hours of age and continued for 120 hours and/or a depth at 32.0°C in will reduce death and disability at 18-22 months corrected age.
The investigators hypothesize that this new nasal cannula will prevent lack of oxygen as well as reduce rebreathing of carbon dioxide under ophthalmic drapes during eye surgery.
The primary objective of this study is to determine the maximum tolerated dose, dose limiting toxicity, safety and tolerability of TH-302 in patients with acute leukemias, advanced phase chronic myelogenous leukemia (CML), high risk myelodysplastic syndromes, advanced myelofibrosis or relapsed/refractory chronic lymphocytic leukemia (CLL).
The purpose of this study is to evaluate Brain MRI (Magnetic Resonance Imaging), and Brain CT (Computed Tomography) Angiogram data in subjects who participate in the "Hyperbaric Oxygen for Chronic Stable Brain Injury" (HYBOBI) study. Including information from MRI and CT studies provide information about whether hyperbaric oxygen improves brain function in subjects who have had a brain injury. Subjects will complete MR and CT scans twice during the study. The first MR and CT will be performed prior to the first hyperbaric session of the HYBOBI study, and the second will be performed within two weeks following the last hyperbaric session.
Hypoxia, meaning a lack of oxygen, has been associated strongly with a wide range of human cancers. Hypoxia occurs when tumor growth exceeds the ability of blood vessels to supply the tumor with oxygenated blood. It is currently understood that hypoxic tumors are more aggressive. Current methods for measuring hypoxia include invasive procedures such as tissue biopsy, or insertion of an electrode into the tumor. EF5-PET may be a non-invasive way to measure tumor hypoxia.