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Study of Brain Blood Flow During Induced Hypercapnia (Excess Blood Carbon Dioxide)

NCT00001845 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 30

Last updated 2008-03-04

No results posted yet for this study

Summary

This study will evaluate magnetic resonance imaging (MRI ) methods for measuring changes in the brain's blood flow during hypercapnia (a condition of excess carbon dioxide in the blood). MRI is a diagnostic tool that uses a large magnet and radio waves to produce images of the body without X-rays.

Healthy normal volunteers in this study may have as many as six MRI scans over a 2-year period. For this procedure, the person lies on a stretcher placed in a strong magnetic field produced by the MRI machine. During the scan, the person's blood carbon dioxide (CO2 ) levels will be increased either by: 1) breathing air mixtures containing up to 5% CO2; or 2) receiving an intravenous (I.V.) injection of a drug called acetazolamide.

Persons who breathe CO2 will have their heart rate, blood pressure and oxygen levels monitored throughout the procedure. Those receiving acetazolamide will have the drug injected intravenously (I.V.) into an arm vein. If the volunteer experiences any unpleasant side effects from the CO2 or acetazolamide, the study will be stopped.

The information gained from this study will be used to develop better ways to study brain function, possibly leading to better diagnostic and treatment methods.

Conditions

  • Healthy
  • Hypercapnia

Sponsors & Collaborators

  • National Institutes of Health Clinical Center (CC)

    lead NIH

Eligibility

Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
1999-09-30
Completion
2004-08-31

Countries

  • United States

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00001845 on ClinicalTrials.gov