Clinical Trials Logo

Clinical Trial Summary

Computed tomography (CT) studies considering bronchial dimensions in chronic obstructive pulmonary disease (COPD) have never considered nycthemeral variations. Airway calibre, in COPD patients, exhibits a nycthemeral variations with maximal values around noon and minimal values in the early morning, that persists under long-acting bronchodilator. Furthermore, no study has assessed the possible nycthemeral variations of CT scans parameters reflecting airway remodelling and emphysema extent in COPD patients.

This is a prospective study whose purpose is to assess these variations and their relationships with pulmonary function testing (PFT) in COPD patients.


Clinical Trial Description

Patients : COPD patients aged 40 years or more, with a smoking history of > 10 pack-years (PY), a post-bronchodilator forced expiratory volume in one second to vital capacity ratio (FEV1/VC) < 0.7 and an optimal treatment according to GOLD guidelines will be included. Exclusion criteria are: COPD exacerbation or respiratory infection in the 4 weeks before the begin of the study, concomitant pulmonary disease (tuberculosis, significant bronchiectasis, lung cancer), pulmonary resection, active malignancy or malignancy of any organ system within the past 5 years.

Procedures: All measurements will be performed on the same day, after obtaining the written informed consent of the patient. Medical history, smoking status and patient's treatment will be collected.

At 08:00 AM (T0): PFT will be performed, including vital capacity (VC), forced vital capacity (FVC), functional residual capacity (FRC), total lung capacity (TLC), residual volume (RV), forced expiratory volume in one second (FEV1), diffusion lung capacity for carbon monoxide (DLCO), and alveolar volume (VA) measurements (either in absolute values and percentage of predicted values). A first CT scan will be performed using the following technique:

- Supine CT scan after full inspiration.

- Acquisition parameters: (Topogram 35 mA 120 kV 512 mm length) 90 quality ref mAs with care-dose ON 120 kV Pitch 1.4 Rotation time 0.33 s Acquired images 64 x 0.6 mm

- Reconstructions parameters: B60f 1mm-thick every 0.7 mm, B20f 1mm-thick every 10.0 mm, B35f 1mm-thick every 0.7 mm, B60f 5mm-thick every 5.0 mm and B35f 5mm-thick every 5.0 mm

At 04:00 PM (T0+8h): PFT will be performed, including vital capacity (VC), forced vital capacity (FVC), functional residual capacity (FRC), total lung capacity (TLC), residual volume (RV), forced expiratory volume in one second (FEV1), diffusion lung capacity for carbon monoxide (DLCO), and alveolar volume (VA) measurements (either in absolute values and percentage of predicted values). A second CT scan will be performed using the following technique:

- Supine CT scan after full inspiration.

- Acquisition parameters: (Topogram 35 mA 120 kV 512 mm length) 90 quality ref mAs with care-dose ON 120 kV Pitch 1.4 Rotation time 0.33 s Acquired images 64 x 0.6 mm

- Reconstructions parameters: B60f 1mm-thick every 0.7 mm, B20f 1mm-thick every 10.0 mm, B35f 1mm-thick every 0.7 mm, B60f 5mm-thick every 5.0 mm and B35f 5mm-thick every 5.0 mm

Data analysis:

- Emphysema index: from B20f reconstructions, calculation of RA960 using Pulmo CT software.

- Airway index: from B60f reconstructions (1mm-thick every 0.7 mm), calculations of luminal area and wall area for several bronchi.

Statistical analyses : Comparisons of CT parameters values or derived values (for example : wall area to airway area ratio) reflecting emphysema and airways remodelling measured on CT scans obtained à T0 and T0+8h. Correlations with PFT values and derived values. ;


Study Design

Observational Model: Case-Only, Time Perspective: Prospective


Related Conditions & MeSH terms


NCT number NCT01192932
Study type Observational
Source Erasme University Hospital
Contact
Status Completed
Phase N/A
Start date March 2010
Completion date June 2011

See also
  Status Clinical Trial Phase
Active, not recruiting NCT06000696 - Healthy at Home Pilot
Active, not recruiting NCT03927820 - A Pharmacist-Led Intervention to Increase Inhaler Access and Reduce Hospital Readmissions (PILLAR) N/A
Completed NCT04043728 - Addressing Psychological Risk Factors Underlying Smoking Persistence in COPD Patients: The Fresh Start Study N/A
Completed NCT04105075 - COPD in Obese Patients
Recruiting NCT05825261 - Exploring Novel Biomarkers for Emphysema Detection
Active, not recruiting NCT04075331 - Mepolizumab for COPD Hospital Eosinophilic Admissions Pragmatic Trial Phase 2/Phase 3
Terminated NCT03640260 - Respiratory Regulation With Biofeedback in COPD N/A
Recruiting NCT04872309 - MUlti-nuclear MR Imaging Investigation of Respiratory Disease-associated CHanges in Lung Physiology
Recruiting NCT05145894 - Differentiation of Asthma/COPD Exacerbation and Stable State Using Automated Lung Sound Analysis With LungPass Device
Withdrawn NCT04210050 - Sleep Ventilation for Patients With Advanced Hypercapnic COPD N/A
Terminated NCT03284203 - Feasibility of At-Home Handheld Spirometry N/A
Recruiting NCT06110403 - Impact of Long-acting Bronchodilator- -Corticoid Inhaled Therapy on Ventilation, Lung Function and Breathlessness Phase 1/Phase 2
Active, not recruiting NCT06040424 - Comparison of Ipratropium / Levosalbutamol Fixed Dose Combination and Ipratropium and Levosalbutamol Free Dose Combination in pMDI Form in Stable Chronic Obstructive Pulmonary Disease (COPD) Patients Phase 3
Recruiting NCT05865184 - Evaluation of Home-based Sensor System to Detect Health Decompensation in Elderly Patients With History of CHF or COPD
Recruiting NCT04868357 - Hypnosis for the Management of Anxiety and Breathlessness During a Pulmonary Rehabilitation Program N/A
Completed NCT01892566 - Using Mobile Health to Respond Early to Acute Exacerbations of COPD in HIV N/A
Completed NCT04119856 - Outgoing Lung Team - a Cross-sectorial Intervention in Patients With COPD N/A
Completed NCT04485741 - Strados System at Center of Excellence
Completed NCT03626519 - Effects of Menthol on Dyspnoea in COPD Patients N/A
Recruiting NCT04860375 - Multidisciplinary Management of Severe COPD N/A