- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01784146
Plethysmography Opto-electronic and Asthma
Analysis of the Distribution of Pulmonary Ventilation After Nebulization by Heliox Associated With Positive Expiratory Pressure in Patients Asthmatics Stable.
Study Overview
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Pernambuco
-
Recife, Pernambuco, Brazil, 50670901
- Laboratório de Fisiologia e Fisioterapia cardiorespiratória
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- The study included individuals diagnosed with moderate to severe asthma with forced expiratory volume in one second (FEV1) <60% or FEV1 <60% - 80% predicted;
- showing reversibility of bronchial obstruction after administration of bronchodilators at least 10% in FEV1.
Exclusion Criteria:
- unable to understand or perform the spirometric maneuver;
- with a history of smoking;
- pulmonary comorbidities as chronic obstructive pulmonary disease (COPD);
- bronchiectasis and tuberculosis sequel;
- hemodynamic instability defined as heart rate (HR) greater than 150 bpm or systolic blood pressure below 90 mmHg or greater than 150mmHg;
- pregnancy and any contraindication to the use of PEEP;
- such as increased work of breathing (acute asthma);
- active hemoptysis;
- acute sinusitis;
- pneumothorax;
- untreated; surgery or facial trauma;
- oral or injury;
- epistaxis;
- nausea and esophageal surgery.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Placebo Comparator: Oxygen
|
For inhalation of oxygen, we used a noninvasive delivery system, semi - closed (Figure 3) consisting of a non-toxic face mask with two unidirectional valves - inspiratory and expiratory branch - connected to the nebulizer (Airlife Misty Neb, Baxter; Valencia, CA, USA). In the inspiratory branch, a reservoir bag (Hudson RCI, USA) with capacity of 2.5 L was connected, in order to avoid dilution of the gas. This skin was fixed to the patient's face to prevent leakage and to maintain adequate pressurization and improved patient compliance to the PEEP. The nebulizer was fed by a flow of 8 l / min of oxygen. |
Experimental: PEEP + Heliox
|
For inhalation of heliox, we used a noninvasive delivery system, semi - closed consisting of a non-toxic face mask with two unidirectional valves - inspiratory and expiratory branch - connected to the nebulizer (Airlife Misty Neb, Baxter; Valencia, CA, USA). In the inspiratory branch, a reservoir bag (Hudson RCI, USA) with capacity of 2.5 L was connected, in order to avoid dilution of the gas. This skin was fixed to the patient's face to prevent leakage and to maintain adequate pressurization and improved patient compliance to the PEEP. The nebulizer was fed by a 11 l / min of heliox for the heliox group in accordance with a protocol of Hess et al.
PEEP supplied was 10 cm H2O through valve (Vital Signs,Totowa, USA) attached to the expiratory branch.
|
Experimental: Oxygen + PEEP
|
For inhalation of oxygen, we used a noninvasive delivery system, semi - closed (Figure 3) consisting of a non-toxic face mask with two unidirectional valves - inspiratory and expiratory branch - connected to the nebulizer (Airlife Misty Neb, Baxter; Valencia, CA, USA). In the inspiratory branch, a reservoir bag (Hudson RCI, USA) with capacity of 2.5 L was connected, in order to avoid dilution of the gas. This skin was fixed to the patient's face to prevent leakage and to maintain adequate pressurization and improved patient compliance to the PEEP. The nebulizer was fed by a flow of 8 l / min of oxygen.
PEEP supplied was 10 cm H2O through valve (Vital Signs,Totowa, USA) attached to the expiratory branch.
|
Active Comparator: Heliox
|
For inhalation of heliox, we used a noninvasive delivery system, semi - closed consisting of a non-toxic face mask with two unidirectional valves - inspiratory and expiratory branch - connected to the nebulizer (Airlife Misty Neb, Baxter; Valencia, CA, USA). In the inspiratory branch, a reservoir bag (Hudson RCI, USA) with capacity of 2.5 L was connected, in order to avoid dilution of the gas. This skin was fixed to the patient's face to prevent leakage and to maintain adequate pressurization and improved patient compliance to the PEEP. The nebulizer was fed by a 11 l / min of heliox for the heliox group in accordance with a protocol of Hess et al. |
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Distribution of volumes of the rib cage in asthma patients-Plesthysmography opto - electronic (POE).
Time Frame: 5 months
|
The markers are meant to reflect the infrared signal emitted by the POE to the sensors, which transform these signals into information about the movement of the chest.
In this evaluation method the chest is considered a geometric model divided into three regions - the volume of pulmonary rib cage (Vrp), abdominal rib cage volume (Vra), part of the chest corresponding to the diaphragm, and abdomen (Va), and the overall volume of the chest (Vcw) the total volume of compartments.
|
5 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Lung function in asthmatic subjects
Time Frame: 5 mothns
|
In spirometry values were obtained for FEV1, PEF and forced vital capacity (FVC), considering the record as the best value according to the American Thoracic Society 18 the percentage of the predicted 16.
For IC, we performed a correction of the weight.
The present study included all patients were instructed to discontinue their medication twelve hours before the experiment as corticosteroids and bronchodilators for short or long duration for performing spirometry
|
5 mothns
|
Collaborators and Investigators
Publications and helpful links
General Publications
- Frischknecht-Christensen E, Norregaard O, Dahl R. Treatment of bronchial asthma with terbutaline inhaled by conespacer combined with positive expiratory pressure mask. Chest. 1991 Aug;100(2):317-21. doi: 10.1378/chest.100.2.317.
- Manthous CA, Hall JB, Caputo MA, Walter J, Klocksieben JM, Schmidt GA, Wood LD. Heliox improves pulsus paradoxus and peak expiratory flow in nonintubated patients with severe asthma. Am J Respir Crit Care Med. 1995 Feb;151(2 Pt 1):310-4. doi: 10.1164/ajrccm.151.2.7842183.
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study 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
- Luciana 2
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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