Cardio-respiratory Responses During Hypoxic Exercise in Individuals Born Prematurely
NCT ID: NCT02780908
Last Updated: 2016-08-30
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.
UNKNOWN
NA
37 participants
INTERVENTIONAL
2016-04-30
2018-12-31
Brief Summary
Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.
Related Clinical Trials
Explore similar clinical trials based on study characteristics and research focus.
Impact of Hypoxia on Resting and Exertional Right Ventricular Performance
NCT05272514
Project Mountain - Comparing SpO2 and SaO2 for Accuracy
NCT06372106
Accuracy of Pulse Oximeters During Profound Hypoxia
NCT05790616
Monitored Effects of Physical Activity on Fetal Heart Rate by Using a Wireless Non-invasive Device
NCT06813859
Effect of Short-term Simulated Altitude Exposure on Cardiopulmonary Functional Capacity
NCT02523716
Detailed Description
Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.
Conditions
See the medical conditions and disease areas that this research is targeting or investigating.
Study Design
Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.
RANDOMIZED
PARALLEL
PREVENTION
SINGLE
Study Groups
Review each arm or cohort in the study, along with the interventions and objectives associated with them.
Hypoxia at rest and exercise
The participants will perform a resting test, hypoxia sensitivity test and a graded exercise test to voluntary exhaustion in normoxic condition ((HYPO; FiO2=0.120 corresponding to terrestrial altitude of approx. 4000 m)
Graded exercise testing
All graded exercise tests will be performed on electromagnetically controlled cycle-ergometer Ergo Bike Premium. The testing protocol will commence with a 10-min resting period, to obtain the resting cardio-respiratory values, followed by a 5-min warm up at a work rate of 60 W. Thereafter the workload will increase every fourth minute by 40 W. The participants will be required to maintain a cadence of 60·min-1 throughout the whole test. The test is terminated when the participant is unable to maintain the assigned cadence.
Resting testing
The resting test will be performed in supine position with participants breathing normoxic air (FiO2=0.21) for 30 min and hypoxic gas for the subsequent 30-min (FiO2=0.120). During the whole protocol duration the respiration, local blood flow, ECG and EEG will be measured non-invasively.
Normoxia at rest and exercise
The participants will perform a resting test and a graded exercise test to voluntary exhaustion in normoxic condition ((NORM; fraction of inspired oxygen (FiO2)=0.209, placebo)
Graded exercise testing
All graded exercise tests will be performed on electromagnetically controlled cycle-ergometer Ergo Bike Premium. The testing protocol will commence with a 10-min resting period, to obtain the resting cardio-respiratory values, followed by a 5-min warm up at a work rate of 60 W. Thereafter the workload will increase every fourth minute by 40 W. The participants will be required to maintain a cadence of 60·min-1 throughout the whole test. The test is terminated when the participant is unable to maintain the assigned cadence.
Resting testing
The resting test will be performed in supine position with participants breathing normoxic air (FiO2=0.21) for 30 min and hypoxic gas for the subsequent 30-min (FiO2=0.120). During the whole protocol duration the respiration, local blood flow, ECG and EEG will be measured non-invasively.
Interventions
Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.
Graded exercise testing
All graded exercise tests will be performed on electromagnetically controlled cycle-ergometer Ergo Bike Premium. The testing protocol will commence with a 10-min resting period, to obtain the resting cardio-respiratory values, followed by a 5-min warm up at a work rate of 60 W. Thereafter the workload will increase every fourth minute by 40 W. The participants will be required to maintain a cadence of 60·min-1 throughout the whole test. The test is terminated when the participant is unable to maintain the assigned cadence.
Resting testing
The resting test will be performed in supine position with participants breathing normoxic air (FiO2=0.21) for 30 min and hypoxic gas for the subsequent 30-min (FiO2=0.120). During the whole protocol duration the respiration, local blood flow, ECG and EEG will be measured non-invasively.
Eligibility Criteria
Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.
Inclusion Criteria
PRETERM group; gestational age: ≤ 32 weeks; gestational weight ≤ 1500 g
CONTROL group: full term born individuals ≤ 38 weeks
Exclusion Criteria
Chronically illnesses
Hormonal therapy
Recent sub-standard nutritional status
Family history of respiratiory, cardio-vascular, renal or hematological disease History of: thyroid dysfunction, renal stones, diabetes, allergies, hypertension, hypocalcaemia, uric acidaemia, lipidaemia or hyperhomocystinaemia
History of mental illness
Smoker within six months prior to the start of the study
Abuse of drugs, medicine or alcohol
Participation in another study up to two months before study onset
No signed consent form before the onset of the experiment
Blood donors in the past three months before the onset of the experiment
Vegetarian and Vegans
Migraines
History of vestibular disorders
Claustrophobia
18 Years
24 Years
MALE
Yes
Sponsors
Meet the organizations funding or collaborating on the study and learn about their roles.
University of Ljubljana School of Medicine, Slovenia
OTHER
University Medical Centre Ljubljana
OTHER
University of Lausanne
OTHER
University of Lyon
OTHER
Lancaster University
OTHER
University of Ljubljana
OTHER
Jozef Stefan Institute
OTHER
Responsible Party
Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.
Principal Investigators
Learn about the lead researchers overseeing the trial and their institutional affiliations.
Damjan Osredkar, MD, PhD
Role: PRINCIPAL_INVESTIGATOR
University Children's Hospital Ljubljana Department of Pediatric Neurology
Locations
Explore where the study is taking place and check the recruitment status at each participating site.
Jozef Stefan Institute
Ljubljana, Ljubljana, Slovenia
University Children's Hospital Ljubljana Department of Pediatric Neurology
Ljubljana, Ljubljana, Slovenia
Countries
Review the countries where the study has at least one active or historical site.
Central Contacts
Reach out to these primary contacts for questions about participation or study logistics.
Facility Contacts
Find local site contact details for specific facilities participating in the trial.
References
Explore related publications, articles, or registry entries linked to this study.
Debevec T, Pialoux V, Mekjavic IB, Eiken O, Mury P, Millet GP. Moderate exercise blunts oxidative stress induced by normobaric hypoxic confinement. Med Sci Sports Exerc. 2014 Jan;46(1):33-41. doi: 10.1249/MSS.0b013e31829f87ef.
Debevec T, Mekjavic IB. Short intermittent hypoxic exposures augment ventilation but do not alter regional cerebral and muscle oxygenation during hypoxic exercise. Respir Physiol Neurobiol. 2012 Apr 30;181(2):132-42. doi: 10.1016/j.resp.2012.02.008. Epub 2012 Mar 2.
Debevec T, Keramidas ME, Norman B, Gustafsson T, Eiken O, Mekjavic IB. Acute short-term hyperoxia followed by mild hypoxia does not increase EPO production: resolving the "normobaric oxygen paradox". Eur J Appl Physiol. 2012 Mar;112(3):1059-65. doi: 10.1007/s00421-011-2060-7. Epub 2011 Jul 7.
Debevec T, Amon M, Keramidas ME, Kounalakis SN, Pisot R, Mekjavic IB. Normoxic and hypoxic performance following 4 weeks of normobaric hypoxic training. Aviat Space Environ Med. 2010 Apr;81(4):387-93. doi: 10.3357/asem.2660.2010.
Debevec T, Pialoux V, Ehrstrom S, Ribon A, Eiken O, Mekjavic IB, Millet GP. FemHab: The effects of bed rest and hypoxia on oxidative stress in healthy women. J Appl Physiol (1985). 2016 Apr 15;120(8):930-8. doi: 10.1152/japplphysiol.00919.2015. Epub 2016 Jan 21.
Debevec T, Simpson EJ, Macdonald IA, Eiken O, Mekjavic IB. Exercise training during normobaric hypoxic confinement does not alter hormonal appetite regulation. PLoS One. 2014 Jun 2;9(6):e98874. doi: 10.1371/journal.pone.0098874. eCollection 2014.
Osredkar D, Sabir H, Falck M, Wood T, Maes E, Flatebo T, Puchades M, Thoresen M. Hypothermia Does Not Reverse Cellular Responses Caused by Lipopolysaccharide in Neonatal Hypoxic-Ischaemic Brain Injury. Dev Neurosci. 2015;37(4-5):390-7. doi: 10.1159/000430860. Epub 2015 Jun 12.
Osredkar D, Thoresen M, Maes E, Flatebo T, Elstad M, Sabir H. Hypothermia is not neuroprotective after infection-sensitized neonatal hypoxic-ischemic brain injury. Resuscitation. 2014 Apr;85(4):567-72. doi: 10.1016/j.resuscitation.2013.12.006. Epub 2013 Dec 19.
Debevec T, Pialoux V, Poussel M, Willis SJ, Martin A, Osredkar D, Millet GP. Cardio-respiratory, oxidative stress and acute mountain sickness responses to normobaric and hypobaric hypoxia in prematurely born adults. Eur J Appl Physiol. 2020 Jun;120(6):1341-1355. doi: 10.1007/s00421-020-04366-w. Epub 2020 Apr 8.
Other Identifiers
Review additional registry numbers or institutional identifiers associated with this trial.
JozefSI
Identifier Type: -
Identifier Source: org_study_id
More Related Trials
Additional clinical trials that may be relevant based on similarity analysis.