Exhaled Nitric Oxide in Respiratory Syncytial Virus (RSV) Bronchiolitis: a Pilot Study

NCT ID: NCT01090557

Last Updated: 2010-03-22

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

60 participants

Study Classification

OBSERVATIONAL

Study Start Date

2007-10-31

Study Completion Date

2009-10-31

Brief Summary

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The fraction of exhaled nitric oxide (feNO) in expired air is a reliable measure of airway inflammation. Some research experiments have demonstrated stimulation of nitric oxide production in respiratory epithelial cells infected with RSV.

The principal aims are to determine if the fraction of exhaled nitric oxide (feNO) is elevated in hospitalized pediatric patients with viral lower respiratory illness and to determine if there is a difference in feNO level between RSV and non-RSV infection.

NO may play a role in the association between RSV, airway reactivity, and airway inflammation.

This is a prospective, pilot study that will noninvasively measure feNO in children 0-4 years of age admitted to Winthrop University Hospital, as well as controls (children in the same age range without respiratory conditions and who are well enough to perform the test). Hospitalized children will be tested for RSV (enzyme immunoassay (EIA) \& DFA) and via direct fluorescent antigen technique (DFA) for influenza A \& B, parainfluenza, human metapneumovirus and adenovirus.

Method of feNO measurement will utilize the offline options for preschool children \& infants appropriate for age as described in the 2005 Joint Statement of the American Thoracic Society \& the European Respiratory Society when discussing tidal breathing techniques with uncontrolled flow rate Offline exhaled air can be collected via a mouthpiece or a face mask connected to a non-re-breathing valve that allows inspiration of NO-free air from an NO-inert reservoir to avoid contamination by ambient NO. Exhaled breath samples are collected into an NO-inert bag fitted with the expiratory port once a stable breathing pattern is present.

The results of all 3 groups will be compared: control, RSV positive and RSV negative samples.

Detailed Description

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Conditions

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RSV Infection Bronchiolitis

Study Design

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Observational Model Type

CASE_CONTROL

Study Time Perspective

PROSPECTIVE

Study Groups

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RSV positive subjects

Subjects admitted to the hospital with Lower respiratory tract Viral infection symptoms from which nasopharyngeal mucous samples are positive for RSV by Direct Fluorescent Antibody technique and/or viral culture

Collection of exhaled breath

Intervention Type OTHER

balloon collection, via the tidal breathing techniques with uncontrolled flow rate for offline feNO measurement

RSV negative subjects

Subjects admitted to the hospital with Lower respiratory tract Viral infection symptoms from which nasopharyngeal mucous samples are negative for RSV by Direct Fluorescent Antibody technique and/or viral culture (usually positive for influenza A \& B, parainfluenza, human metapneumovirus or adenovirus)

Collection of exhaled breath

Intervention Type OTHER

balloon collection, via the tidal breathing techniques with uncontrolled flow rate for offline feNO measurement

Control group

Children with same age range, ethnic background, and gender distribution as the study group coming for evaluation in the outpatient setting without evidence of viral infection

Collection of exhaled breath

Intervention Type OTHER

balloon collection, via the tidal breathing techniques with uncontrolled flow rate for offline feNO measurement

Interventions

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Collection of exhaled breath

balloon collection, via the tidal breathing techniques with uncontrolled flow rate for offline feNO measurement

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* Admitted subjects with diagnosis of bronchiolitis, viral pneumonia or other significant respiratory viral infection

Exclusion Criteria

* asthma/RAD
* recurrent wheezing
* "recurrent bronchiolitis"
* allergic rhinitis
* atopy
* chronic lung disease
* hypertension
* heart failure
* pulmonary hypertension
* primary ciliary dyskinesia
* bronchiectasis
* alveolitis
* lung transplant rejection
* pulmonary sarcoidosis
* chronic cough (i.e. greater four weeks)
* systemic sclerosis
* hypersensitivity
* cystic fibrosis
* HIV
* sickle cell anemia
* cardiac pulmonary bypass
* liver cirrhosis
* alpha-1 anti-trypsin disease
* interstitial lung
Minimum Eligible Age

1 Day

Maximum Eligible Age

4 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Winthrop University Hospital

OTHER

Sponsor Role lead

Responsible Party

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Division of Pediatric Critical Care,Winthrop University Hospital

Principal Investigators

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Maria L Quintos-Alagheband, MD

Role: PRINCIPAL_INVESTIGATOR

Winthrop University Hospital

Locations

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Winthrop University Hospital

Mineola, New York, United States

Site Status

Countries

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United States

References

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American Thoracic Society; European Respiratory Society. ATS/ERS recommendations for standardized procedures for the online and offline measurement of exhaled lower respiratory nitric oxide and nasal nitric oxide, 2005. Am J Respir Crit Care Med. 2005 Apr 15;171(8):912-30. doi: 10.1164/rccm.200406-710ST. No abstract available.

Reference Type BACKGROUND
PMID: 15817806 (View on PubMed)

Baraldi E, de Jongste JC; European Respiratory Society/American Thoracic Society (ERS/ATS) Task Force. Measurement of exhaled nitric oxide in children, 2001. Eur Respir J. 2002 Jul;20(1):223-37. doi: 10.1183/09031936.02.00293102.

Reference Type BACKGROUND
PMID: 12166573 (View on PubMed)

Gentile DA, Doyle WJ, Belenky S, Ranck H, Angelini B, Skoner DP. Nasal and oral nitric oxide levels during experimental respiratory syncytial virus infection of adults. Acta Otolaryngol. 2002 Jan;122(1):61-6. doi: 10.1080/00016480252775751.

Reference Type BACKGROUND
PMID: 11876601 (View on PubMed)

Ricciardolo FL, Sterk PJ, Gaston B, Folkerts G. Nitric oxide in health and disease of the respiratory system. Physiol Rev. 2004 Jul;84(3):731-65. doi: 10.1152/physrev.00034.2003.

Reference Type BACKGROUND
PMID: 15269335 (View on PubMed)

Kao YJ, Piedra PA, Larsen GL, Colasurdo GN. Induction and regulation of nitric oxide synthase in airway epithelial cells by respiratory syncytial virus. Am J Respir Crit Care Med. 2001 Feb;163(2):532-9. doi: 10.1164/ajrccm.163.2.9912068.

Reference Type BACKGROUND
PMID: 11179135 (View on PubMed)

Baraldi E, Dario C, Ongaro R, Scollo M, Azzolin NM, Panza N, Paganini N, Zacchello F. Exhaled nitric oxide concentrations during treatment of wheezing exacerbation in infants and young children. Am J Respir Crit Care Med. 1999 Apr;159(4 Pt 1):1284-8. doi: 10.1164/ajrccm.159.4.9807084.

Reference Type BACKGROUND
PMID: 10194178 (View on PubMed)

Other Identifiers

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07029

Identifier Type: -

Identifier Source: org_study_id

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