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Bronchospasm Associated With High Nitric Oxide

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: April 25, 2008
Last Update Posted: April 25, 2008
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by:
University of Sao Paulo
Intraoperative bronchospasm challenges anesthesia's safety. This study aims to investigate high concentration of exhaled nitric oxide as a marker of intraoperative bronchospasm.

Asthma Airway Hyperresponsiveness

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Retrospective
Official Title: Higher Exhaled Nitric Oxide (NO) is Associated With Intraoperative Bronchospasm

Resource links provided by NLM:

Further study details as provided by University of Sao Paulo:

Primary Outcome Measures:
  • Exhaled nitric oxide in parts per billion [ Time Frame: one to six months after surgery ]

Secondary Outcome Measures:
  • Eosinophils concentration within sputum sample, pulmonary function tests [ Time Frame: one to six months after surgery ]

Biospecimen Retention:   Samples Without DNA

Enrollment: 31
Study Start Date: January 1999
Study Completion Date: December 2004
Patients who presented bronchospasm during anesthesia induction
Patients who presented bronchospasm during anesthesia induction and were identified as asthmatics
Patients who were submitted to anesthesia induction and showed no complications

Detailed Description:
Previous studies in asthmatic patients suggested that exhaled nitric oxide may represent a noninvasive measure for airway inflammation. Anesthesia information forms from 1999 throughout 2004 were revised (n=146.358). Bronchospasm occurrence appeared registered on 863 forms. From those, nine were identified as non-asthmatics patients (Bronchospasm group). Also, 12 asthmatics constituted one additional group (Asthma group) and 10 subjects with no previous airway disease or symptoms (Control group). All subjects were submitted to Exhaled nitric oxide measurements (parts/billion), spirometry and induced sputum.

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Ages Eligible for Study:   16 Years to 65 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Hospital, late post-anesthesia cared patients

Inclusion Criteria:

  • patients with no systemic disease and registered bronchospasm during anesthesia induction

Exclusion Criteria:

  • hypertension, COPD, diabetes, pregnancy
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00666510

Hospital das Clínicas da FMUSP
São Paulo, Brazil, 05430 010
Sponsors and Collaborators
University of Sao Paulo
Principal Investigator: Joaquim E Vieira, MD, PhD University of Sao Paulo Medical School - FMUSP
  More Information

Responsible Party: Joaquim Edson Vieira, Fisiopatologia Experimental FMUSP
ClinicalTrials.gov Identifier: NCT00666510     History of Changes
Other Study ID Numbers: CAP125-01
First Submitted: April 23, 2008
First Posted: April 25, 2008
Last Update Posted: April 25, 2008
Last Verified: April 2008

Keywords provided by University of Sao Paulo:
nitric oxide
induced sputum

Additional relevant MeSH terms:
Bronchial Spasm
Respiratory Hypersensitivity
Bronchial Diseases
Respiratory Tract Diseases
Hypersensitivity, Immediate
Immune System Diseases
Nitric Oxide
Bronchodilator Agents
Autonomic Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Asthmatic Agents
Respiratory System Agents
Free Radical Scavengers
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Endothelium-Dependent Relaxing Factors
Vasodilator Agents
Protective Agents