MedTrace Logo

Clinical Evidence of pH Dependent ß2 Adrenergic Transport Mechanisms in the Airway

NCT01216748 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 10

Last updated 2016-05-27

Study results available
· View outcomes & findings →

Summary

The purpose of this study was to determine if airway pH has an effect on albuterol-induced vasodilation in the airway. Methods: Ten healthy volunteers performed the following respiratory maneuvers: quiet breathing, hypocapnic hyperventilation, hypercapnic hyperventilation, and eucapnic hyperventilation

Conditions

  • Healthy Volunteers

Interventions

OTHER

quiet breathing

Subjects were instructed to breath normally at room air.

OTHER

Hypocapnic Hyperventilation

hypocapnic hyperventilation, the subjects were instructed to breathe fast and deep until their end-tidal pCO2 fell to 30 mmHg, corresponding to a systemic pH increase of about 0.1 pH units.

OTHER

Hypercapnic Hyperventilation

For hypercapnic hyperventilation, a modification of a previously described procedure (15). While monitoring SaO2 using pulse oximetry and end-tidal CO2 by mass-spectrometry on a breath by breath basis, CO2 was bled into the inspired air to achieve an end-tidal pCO2 of at least 55 mmHg

OTHER

eucapnic hyperventilation

For eucapnic hyperventilation, the subjects were instructed to increase their ventilation to the highest level of ventilation recorded in the previous two hyperventilation maneuvers, while CO2 was bled into the inspired air to maintain end-tidal pCO2 at 40 mmHg.

Sponsors & Collaborators

  • National Institutes of Health (NIH)

    collaborator NIH

  • National Heart, Lung, and Blood Institute (NHLBI)

    collaborator NIH

  • University of Miami

    lead OTHER

Principal Investigators

  • Matthias Salathe · University of Miami

Study Design

Allocation
NA
Purpose
BASIC_SCIENCE
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
65 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2010-01-31
Primary Completion
2010-07-31
Completion
2010-08-31

Countries

  • United States

Study Locations

More Related Trials

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 NCT01216748 on ClinicalTrials.gov