Effects of carbon monoxide on nasal mucociliary clearance

ISRCTN ISRCTN54813440
DOI https://doi.org/10.1186/ISRCTN54813440
Secondary identifying numbers N0236169531
Submission date
29/09/2006
Registration date
29/09/2006
Last edited
22/09/2014
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Ear, Nose and Throat
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data
Record updated in last year

Plain English summary of protocol

Not provided at time of registration

Contact information

Mr Stephen Lo
Scientific

Department of Otolaryngology
St George's Hospital Medical School
London
SW17 0QT
United Kingdom

Phone +44 (0)20 8725 2050

Study information

Study designProspective single-blinded controlled study
Primary study designInterventional
Secondary study designRandomised controlled trial
Study setting(s)Hospital
Study typeOther
Participant information sheet Not available in web format, please use the contact details below to request a patient information sheet
Scientific title
Study objectivesTo determine the effects of low concentrations of carbon monoxide gas on the motility of human nasal cilia cells.
Ethics approval(s)Not provided at time of registration
Health condition(s) or problem(s) studiedEar, Nose and Throat
InterventionA steady flow of normal air (100 ml/min) is fed into one nostril; the other nostril is left unblocked so air can escape. Simultaneously, the subject breathes via the mouth into an oxygen mouthpiece so that the soft palate closes the mouth from the nasal cavity, and gas flows from one nostril to the other without being inspired into the lungs. This lasts for 10 minutes. The saccharine test is then used to measure the nasal mucociliary clearance time. A saccharine granule is placed in the nose at the same site in all subjects. The time required for the subject to taste the sweetness is measured. Oral only breathing is maintained during the saccharine test. The test is repeated with a 100 cc/min flow of low concentration CO gas (30 ppm) fed into the nostril. The subject is blinded and does not know which gas is fed into the nostril. The nostril into which the gas is fed into is randomised. The background ambient CO level is measured using a commercially available CO detector.
Intervention typeOther
Primary outcome measureThe mucociliary clearance time, measured as the time to taste the saccharin
Secondary outcome measuresNo secondary outcome measures
Overall study start date21/08/2005
Completion date21/08/2006

Eligibility

Participant type(s)Patient
Age groupAdult
Lower age limit18 Years
SexBoth
Target number of participantsAdded 21/07/2008: 26
Key inclusion criteriaHealthy adult volunteers between 18 and 40 years old. Volunteers will be recruited from amongst medical and nursing staff and students at St George’s Hospital, London. They will be personally approached by the principle investigator.
Key exclusion criteria1. Smokers
2. Subjects with a history of chronic respiratory or nasal disease
3. Symptomatic upper respiratory tract infection during the previous 4 weeks
4. Subjects who have taken systemic or topical steroids or anti-histamine therapy during the previous 4 weeks
5. Presence of significant mechanical intra-nasal deformity such as a septal deviation or bony spur
6. Children under 16 years old
7. Vulnerable groups including those with learning difficulty, mental illness and dementia
8. Pregnancy
9. Other conditions that increase risk are hyperthyroidism, obesity, bronchitis, asthma, pre-existing heart disease and alcoholism
Date of first enrolment21/08/2005
Date of final enrolment21/08/2006

Locations

Countries of recruitment

  • England
  • United Kingdom

Study participating centre

Department of Otolaryngology
London
SW17 0QT
United Kingdom

Sponsor information

Record Provided by the NHSTCT Register - 2006 Update - Department of Health
Government

The Department of Health, Richmond House, 79 Whitehall
London
SW1A 2NL
United Kingdom

Phone +44 (0)20 7307 2622
Email dhmail@doh.gsi.org.uk
Website http://www.dh.gov.uk/Home/fs/en

Funders

Funder type

Government

St George's Healthcare NHS Trust (UK)

No information available

NHS R&D Support Funding (UK)

No information available

Results and Publications

Intention to publish date
Individual participant data (IPD) Intention to shareNo
IPD sharing plan summaryNot provided at time of registration
Publication and dissemination planNot provided at time of registration
IPD sharing plan