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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT01566968
Other study ID # NEAT Version 2, 18/03/11
Secondary ID
Status Completed
Phase N/A
First received January 24, 2012
Last updated April 5, 2012
Start date January 2011
Est. completion date April 2012

Study information

Verified date April 2012
Source University Hospital of South Manchester NHS Foundation Trust
Contact n/a
Is FDA regulated No
Health authority United Kingdom: National Health Service
Study type Observational

Clinical Trial Summary

The sensitivity of a person's cough reflex can be measured by getting them to breathe in (inhale) irritant chemicals. There are different methods by which subjects are asked to inhale these chemicals, either by taking one deep breath in, or by asking them to just continue to take a number of breaths. The purpose of this clinical research study is to see if the coughing responses are different in healthy people and people with respiratory problems that make them cough when they are given these chemicals in these two methods.


Recruitment information / eligibility

Status Completed
Enrollment 98
Est. completion date April 2012
Est. primary completion date April 2012
Accepts healthy volunteers Accepts Healthy Volunteers
Gender Both
Age group 18 Years to 75 Years
Eligibility Inclusion Criteria:

- Adult subjects aged 18 and over.

Meet criteria for subject groups as outlined below:

Healthy volunteers:

- Must be non smokers.

- No history of respiratory disease.

Healthy smokers:

- Current smokers with at least 10 pack year history of smoking.

- Spirometry within normal limits i.e. FEV1 > 80% predicted and FEV1/FVC ratio of > 75% predicted.

Asthma:

- Physician diagnosis of asthma

- Stable asthma.

- Airway hyperresponsiveness to methacoline; PC20< 16mg/ml.

- Non smokers or ex-smokers with smoking history of less than 10 pack years.

COPD:

- Physician diagnosis of COPD

- Ex smokers with smoking history of at least 20 pack years

- Spirometry demonstating evidence of airflow obstruction i.e. FEV1/FVC ratio of < 70%

Chronic cough:

- History of dry cough for at least 8 weeks.

- Normal chest x ray.

- Non smokers or ex smokers of less than 10 pack years history of smoking.

Exclusion Criteria:

- Symptoms of upper respiratory tract infection within the last 4 weeks.

- Participation in another clinical trial of an investigational drug within 4 weeks.

- Use of medication likely to alter cough reflex sensitivity i.e. ACE inhibitors, codeine phosphate, morphine sulphate.

- Patients with severe respiratory disease i.e. FEV1 < 1.0 litre.

- Use of steroid tablets in previous 2 months or taken more than 3 courses of steroid tablets in the preceding 12 months in subjects with asthma or COPD.

- Change in asthma treatment in the preceding 6 weeks in asthma group

- Significant medical co-morbidities likely to affect ability to participate in the trial or affect cough reflex sensitivity e.g. diabetes, stroke, Parkinson's disease, multiple sclerosis etc.

Study Design

Observational Model: Cohort, Time Perspective: Prospective


Related Conditions & MeSH terms


Intervention

Other:
Cough challenge test
Cough challenge will be performed with Capsaicin, citric acid and prostaglandin E2.
24 hour ambulatory cough recording
Cough recording by using an ambulatory sound recording device.
Cough quality of life questionnaire
questionnaire designed to assess impact of cough on a person's life

Locations

Country Name City State
United Kingdom University Hospital of South Manchester Manchester Greater Manchester

Sponsors (1)

Lead Sponsor Collaborator
University Hospital of South Manchester NHS Foundation Trust

Country where clinical trial is conducted

United Kingdom, 

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