Inhaler Lung Deposition in Chronic Obstructive Pulmonary Disease (COPD)
Inhaler Lung Deposition in Chronic Obstructive Pulmonary Disease (COPD)
Patients with chronic obstructive pulmonary disease (COPD) experience breathing difficulties
 because the airways deep in their lungs become narrowed. COPD patients use inhaler drugs to
 provide relief from breathlessness. However, current inhalers are inefficient as they deliver
 a 'coarse-mist' of drug-droplets that do not reach the deep airways.

 In our study, we will use an inhaler of 'fine-mist' drug-droplets, tagged with a radioactive
 tracer to track them. We will take images of the lungs to see if the fine-mist droplets reach
 the deep airways, and assess if this improves the breathing capacity in our patients. Our
 research may allow the development of new, more efficient inhalers to improve treatment for
 patients with COPD.
PURPOSE:

 The purpose of the research (or "knowledge gap" this research is designed to fill) is to
 understand the fate of inhaled drug within the lungs of COPD patients. Current inhalers in
 use were developed to treat asthma, which is predominantly a disease of the large airways,
 and these inhalers may not be optimal in treating COPD patients (which is predominantly a
 disease of the small airways). Poor delivery of inhaled bronchodilators to the peripheral
 deep airways may be a major factor limiting the clinical benefit provided by existing
 devices. The key to successful treatment could be to accurately target inhaled drug to the
 diseased lung sites, which is the hypothesis that this protocol will test.

 DESIGN & FUNDING:

 Dr Omar Usmani has developed the research protocol and the study has been funded by the UK
 Government Department of Health through the NIHR (National Institute for Health Research),
 which funds leading edge research in the NHS focussed on the needs of patients and the public
 and aims to improve the health and wealth of the nation through research. The study has been
 peer reviewed by International Experts in this field of research.

 PROTOCOL:

 This protocol has two studies: Lung DEPOSITION study (in COPD patients and Healthy subjects)
 and Lung PHYSIOLOGY study (in COPD patients and Asthmatics).

 Each study (Lung DEPOSITION and Lung PHYSIOLOGY) will be a randomised, double-blind,
 crossover, (7 treatments,controlled against pMDI salbutamol), study. Treatments will be given
 as one off dose administration.

 There will be an interval of at least 5 days between each study visit. The Lung DEPOSITION
 study will involve radiolabelled drug treatments.

 All the treatments in the LUNG PHYSIOLOGY study will be non-radiolabelled. Salbutamol will be
 the drug aerosol administered to each subject at each visit. Subjects and investigators will
 be blinded to the 'fine-mist' aerosol particle sizes given (at 6 treatments). The control arm
 will be salbutamol drug aerosol delivered as a 'coarse mist' standard metered dose inhaler
 (7th treatment visit).

 RECRUITMENT/SAMPLE SIZE; The study will recruit; Lung DEPOSITION study: 12 mild-moderate COPD
 patients, 12 healthy subjects Lung PHYSIOLOGY study: 26 mild-moderate COPD patients, 13
 mild-moderate asthmatic patients

 INCLUSION / EXCLUSION:

 At the screening vist, no one will be unfairly excluded from the research, particularly as
 COPD is a disease of older age and those over 65 should not be discriminated against. This
 research will therefore reflect the 'real world' of COPD.
Inclusion Criteria:

 - COPD patients, either male or female, over the age of 40 with a clinical diagnosis of
 COPD with airflow obstruction(FEV1/FVC<0.7) and post-bronchodilator FEV1>50% predicted, gas
 trapping (on lung volume testing), and decreased carbon monoxide transfer factor.

 Healthy subjects will be nonsmokers(or exsmokers stopped 5 years ago), will have no
 respiratory disease, normal spirometry and be age-matched to the COPD patients.

 Asthmatic subjects, either male or female, over the age of 18 with a clinical diagnosis of
 Asthma with airflow obstruction (FEV1/FVC<0.7).

 All patients should be capable of giving informed consent.

 Exclusion Criteria:

 1. Oral corticosteroids taken within last month.

 2. Current involvement (or involvement in the last 4 weeks)in clinical trials assessing
 investigational medicinal products.

 3. Previous adverse reaction to short or long acting β2 agonist.

 4. Any subject with a contraindication to taking inhaled beta2-adrenoceptor agonists
 (especially salbutamol) as listed in the British National Formulary will not be
 entered into this study.

 5. Those who have experienced an acute respiratory exacerbation requiring emergency room
 treatment and/ or hospitalisation within four weeks of visit 1 (screening visit).

 6. Pregnant or breastfeeding women.

 7. Subjects unable to give Informed Consent.