Effects of Continuous Airway Pressure on the Ability to Heat and Humidify Air

September 4, 2013 updated by: University of Chicago

We hypothesize that continuous positive pressure applied to the airway will decrease the ability of the nose to warm and humidify inspired air compared to zero or negative pressure.

We will use continuous positive airway pressure (CPAP), a device commonly used to treat patients with sleep apnea, to vary the pressure in the airway and determine if increased pressure decreases the ability to warm and humidify inspired air. If our hypothesis is correct, it may explain the reason why CPAP is poorly tolerated in patients with sleep apnea; i.e., less ability to warm and humidify air leading to more nasal mucosal irritation.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment

10

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Illinois
      • Chicago, Illinois, United States, 60637
        • University of Chicago

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 55 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. Males and females between 18 and 55 years of age.
  2. A clinical history suggestive of normal nose and upper airway, other than during a cold.
  3. Willingness of the subject to participate in and complete the study, and the ability to understand the purpose of the trial.

Exclusion Criteria:

  1. Physical sign or symptoms suggestive of renal, hepatic or cardiovascular disease.
  2. Women of childbearing potential who are pregnant, trying to become pregnant or nursing a child.
  3. Subjects treated with systemic steroids during the previous 30 days.
  4. Subjects treated with topical (inhaled, intranasal or intraocular) steroids, Nasalcrom or Opticrom during the previous 15 days.
  5. Subjects treated with oral antihistamine/decongestants during the previous seven days.
  6. Subjects treated with topical (intranasal or intraocular) antihistamine/decongestants during the previous 3 days.
  7. Subjects treated with immunotherapy.
  8. Subjects on chronic anti-asthma medications.
  9. Subjects with polyps in the nose or a significantly displaced septum.
  10. Subjects who have incurred an upper respiratory tract infection within 14 days of the start of the study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
The amount of water evaporated during the last 5 minutes of exposure to cold, dry air

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Chicago

Collaborators

Fisher and Paykel Healthcare

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

June 1, 2006

Primary Completion (Actual)

September 1, 2006

Study Completion (Actual)

September 1, 2006

Study Registration Dates

First Submitted

June 15, 2006

First Submitted That Met QC Criteria

June 16, 2006

First Posted (Estimate)

June 20, 2006

Study Record Updates

Last Update Posted (Estimate)

September 5, 2013

Last Update Submitted That Met QC Criteria

September 4, 2013

Last Verified

September 1, 2013

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 14357A

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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