Effects of Symbicort on the Ventilatory Kinematics

Phase

Condition

Copd (Chronic Obstructive Pulmonary Disease)

Chronic Bronchitis

Chronic Obstructive Pulmonary Disease (Copd)

Treatment

N/A

Clinical Study ID

NCT01712854

AAAI1932

Ages 40-75
All Genders

Study Summary

The purpose of this study is to investigate how budesonide/formoterol fumarate dihydrate (Symbicort ©) affects dynamic hyperinflation in patients with obstructive disease using Optoelectronic Plethysmography (OEP). This study is unique as it will be the first randomized, doubleblind, crossover study with a placebo inhaler and budesonide/formoterol fumarate dihydrate as the intervention which will evaluate the effects on ventilatory mechanics through the use of OEP. The investigators plan to demonstrate that budesonide/formoterol fumarate dihydrate impacts dynamic hyperinflation which can be detected with OEP, and that budesonide/formoterol fumarate dihydrate may have an effect in the short term on exercise capacity during a constant load exercise test. The changes in ventilatory mechanics measured after budesonide/formoterol fumarate dihydrate by OEP will provide a unique evaluation of budesonide/formoterol fumarate dihydrate in a controlled setting also demonstrating the utility of OEP in evaluating of the effects of a medical treatment on hyperinflation in individuals with chronic obstructive lung disease (COPD).

Primary Objective/Hypothesis: Our objective is to measure baseline, post treatment and post exercise spirometry and evaluate exercise dynamic hyperinflation before and after treatment using OEP. The investigators hypothesize that budesonide/formoterol fumarate dihydrate will decrease dynamic hyperinflation as measured by OEP.
Primary Endpoint: Our primary endpoint is the change in dynamic hyperinflation, specifically end expiratory volumes, dynamic lung volumes and diaphragmatic paradoxical breathing as measured by OEP.
Secondary Objective: Our secondary objective is to evaluate duration of steady state exercise and exercise capacity before and after treatment. Our secondary hypothesis is that decreases in dynamic hyperinflation during exercise will lead to improvements in dyspnea with exercise, and allow for increases in exercise capacity.
Secondary endpoint: Exercise time, change in Borg scale at rest vs. Borg scale at steady state vs. Borg at end exercise.

Eligibility Criteria

Inclusion

Inclusion Criteria:

Moderate to severe COPD by Global Initiative for Chronic Obstructive Lung Disease (GOLD) criteria
Approval by pulmonologist
Informed consent
Age 40 to 75
Males and females
All races
Ex smoker or non smoker
Prior therapy allowed

Exclusion

Exclusion Criteria:

No active cardiac disease
Alpha1 Antitrypsin Deficiency
Active smoking
Reactive Airways Disease
Pulmonary Hypertension
Comorbid conditions preventing exercise (arthritic, neurologic, vascular, or otherconditions)
BMI>30
Current enrollment in any other concurrent study at Columbia University Medical Centeror sponsored by AstraZeneca at any other sites
Participation in any pharmacologic studies in the last 6 months prior to enrollment inthis study

Study Design

March 01, 2012

September 30, 2012

Study Description

This study will be a prospective, randomized, double blind, crossover interventional design. The crossover allows for equality in number of subjects assigned to each treatment and for subjects to be their own controls. Baseline spirometry will be taken prior to exercise test. Subjects will be prepared for OEP. All exercise will take place on an electromagnetically braked cycle ergometer. Throughout the protocol heart rate, blood pressure, O2 saturation, ventilation, and metabolic data will be recorded. A modified exercise induced asthma protocol will be used. Unlike prior studies, ventilatory kinematics (with isolated diaphragmatic function) will be monitored throughout exercise using biomechanical motion analysis (OEP). This OEP analysis involves compartmentalization of the chest into three sections; 1) pulmonary rib cage, 2) diaphragmatic rib cage, and 3) abdomen to determine the contribution of each component to total lung volume. By measuring the percent contribution of compartment, we are able to better understand its impact on respiration. OEP will be able to quantify and assess the distortion effects of dynamic hyperinflation and obstruction.

Twenty moderate to severe COPD patients will be recruited. Subjects will refrain from their usual inhaled medications for 24 hours prior to the testing session. All subjects will be asked to verify that this is acceptable with their pulmonologist prior to participation. Subjects will also be asked to have their short acting bronchodilators and other regular medications available to be taken if symptoms should occur. During the initial screening, subjects will be familiarized with all procedures. Then baseline pulmonary function testing, and baseline resting OEP measurements will be performed. The subjects will then be randomized to receive either budesonide/formoterol fumarate dihydrate (Symbicort) or a placebo of budesonide only (Entocort EC). At that time, they will receive treatment with either placebo or budesonide/formoterol fumarate dihydrate and after 45 minutes, they will repeat spirometry and OEP and submaximal exercise testing with OEP. After one week, subjects will be tested again and switched to the opposite treatment (i.e. if on budesonide/formoterol fumarate dihydrate initially then switch to placebo and vice versa). The one week washout period between tests will include a resumption of the usual medications. The subjects will refrain from their inhaled medications for 24 hours before the second testing session, but use all of their other usual medications.

Connect with a study center

Columbia University Medical Center
New York, New York 10032
United States
Site Not Available

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