View clinical trials related to Hypoxia.
Filter by:The purpose of this study is to determine whether dipyridamole enhances postocclusive reactive hyperaemia by increasing extracellular adenosine concentrations during ischemia and reperfusion. Furthermore we hypothesize that dipyridamole augments postocclusive reactive hyperaemia by increasing adenosine receptor stimulation.
Prostate cancers, in common with many other tumours, are often hypoxic; that is, they have low levels of oxygen. It is thought that tumour hypoxia may hasten the progression of cancers and make them more resistant to treatment. One previous study has suggested that hormone therapy, such as Casodex, may improve the prostate oxygen level. This study is designed to test that finding.
The aim of this study is to measure the oxygen content and interstitial fluid pressure in cervix cancer patients. Tumour oxygen content and internal pressure of tumours may be an important factor that influences the effectiveness of radiotherapy and other treatments.
The purpose of this study is to describe the regional and global tumor hypoxia in head-and-neck cancer during percutaneous radiation therapy
Hypothesis: Prolonged whole body cooling in term infants with perinatal asphyxial encephalopathy reduces death and severe neurodevelopmental disability. This study aims to determine whether whole body cooling to 33-34°C is a safe treatment that improves survival, without severe neurological or neurodevelopmental impairments at 18 months, of term infants suffering perinatal asphyxial encephalopathy.
This large multicenter trial tested whether cerebral cooling initiated within 6 hours of birth and continued for 72 hours would reduce the risk of death and moderate to severe neurodevelopmental injury at 18-22 months corrected age. Infants at least 36 weeks gestation with an abnormal blood gas within 1 hour of birth, or a history of an acute perinatal event and a 10-min Apgar score <5, or continued need for ventilation were screened. Following a neurological exam, those with moderate to severe encephalopathy were randomized to a 72-hour period of total body cooling (cooling blanket, followed by slow re-warming). The study was conducted in two phases: Phase I (20 infants) were examined for the safety of an esophageal temperature of 34-35 C; Phase II (main trial, 200 infants) were evaluated for the safety and efficacy of an esophageal temperature of 33-34 C. Cardio-respiratory, electroencephalograms (EEGs), renal, metabolic, and hematologic status, and esophageal and abdominal skin temperature were monitored during the 72 hours of intervention. Surviving children were given neurodevelopmental examinations at 18-22 months corrected age and again at school age (6-7 years of age).