- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00788788
Heliox in Experimental Upper Airway Obstruction
PoC Study of Heliox With Helium-Fractions Between 25 and 75% in Experimental Upper Airway Obstruction
Study Overview
Detailed Description
HELIOX is a mixture of Helium and Oxygen. It is a therapeutic modality that can improve upper and lower airway obstruction. The lower density of Helium can help to relieve airway obstruction and is known to lower the work of breathing. The fraction of Helium (FHe) in HELIOX should be maximized (e.g. up to a fraction of 79% with 21% of oxygen added) in order to achieve optimal anti-obstructive outcome and according to the literature a FHe below 60% renders HELIOX ineffective.
Objective: We conducted an investigator-initiated trial using different mixtures of Helium and Oxygen in 44 healthy volunteers in a randomized and double-blinded fashion.
Methods: After an adjustment phase the subjects were breathing through two different external resistors (intratracheal tube with inner diameter of either 4.0mm or 5.0mm) while gas of different composition (medical air with 79% Nitrogen and 21% Oxygen as control gas and HELIOX with a fraction of either 25%, 50% or 75% Helium in Oxygen, respectively) was provided in a blinded and random fashion. A crossover design was used so that every subject was exposed to every HELIOX gas mixture. Subjects were asked to score their degree of dyspnea after breathing different gas mixtures for 2 minutes intervals. In addition the variability of different hemodynamic parameters was assessed (continuous non-invasive blood pressure (systolic, diastolic and mean blood pressure), impedance cardiography (stroke volume and cardiac output), ECG (heart rate variability)) were assessed non-invasively and used to detected a change in the degree of airway obstruction in respect to the added load and the gas mixture.
Study Type
Enrollment (Actual)
Phase
- Phase 2
- Phase 1
Contacts and Locations
Study Locations
-
-
NRW
-
Wuppertal, NRW, Germany, 42283
- HELIOS-Klinikum / University of Witten/Herdecke
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Volunteers of both sexes were recruited via posting in student forum of University of Witten/Herdecke
- Willingness to spend about 2h in the clinical exp. lab.
Exclusion Criteria:
- Acute airway infection
- History of asthma
- Smokers
- Pregnancy
- Abnormal lab. screen with liver function tests, Creat./BUN, CBC, blood glucose
- Anxiety or mood disorder
- Any chronic disease (incl. lung & heart disease, cancer, endocrine disorder)
- Mental retardation
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: 1
Study subjects where breathing Heliox with a fraction of Helium of 25% followed by 50% and 75% with larger external resistor in comparison to medical air
|
HELIOX is a mixture of Helium in Oxygen with a low density and the ability to reduce the work of breathing in subjects with airway obstruction.
The fractions of Helium was altered in a different order depending on the arm of the study
|
Active Comparator: 2
Study subjects where breathing Heliox with a fraction of Helium of 50% followed by 75% and 25% with larger external resistor in comparison to medical air
|
HELIOX is a mixture of Helium in Oxygen with a low density and the ability to reduce the work of breathing in subjects with airway obstruction.
The fractions of Helium was altered in a different order depending on the arm of the study
|
Active Comparator: 3
Study subjects where breathing Heliox with a fraction of Helium of 25% followed by 50% and 75% with larger external resistor in comparison to medical air
|
HELIOX is a mixture of Helium in Oxygen with a low density and the ability to reduce the work of breathing in subjects with airway obstruction.
The fractions of Helium was altered in a different order depending on the arm of the study
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Dyspnea score
Time Frame: Minutes
|
Minutes
|
Variability of systolic blood pressure
Time Frame: Minutes
|
Minutes
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Hubert Trubel, MD, University of Witten/Herdecke
Publications and helpful links
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- Heliox-PoC
- EudraCT-No. 2006-005289-37
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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