Assessment Of The Effects Of Short and Long Term Use Of CPAP
We hypothesize that the nocturnal use of continuous positive airway pressure in adults and children with asthma will decrease airway reactivity.
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Basic Science
|Official Title:||Assessment of the Effects of Short and Long Term Use of Continuous Positive Airway Pressure on Airway Reactivity in Children and Adults With and Without Asthma|
- The reactivity of the airway will be decreased proven by Methacholine challenge. [ Time Frame: 6 to 7 nights after cpap is started. ] [ Designated as safety issue: No ]
|Study Start Date:||February 2005|
|Study Completion Date:||June 2012|
|Primary Completion Date:||June 2012 (Final data collection date for primary outcome measure)|
Arm 1: Subjects will use CPAP days 2 through 6 of the study.
Device: CPAP-Continuous Positive Airway Pressure
Cpap will be worn at night by subjects 6 to 7 days duration.
Deep inspirations have been shown to decrease the sensitivity of airways to narrowing (airway reactivity) after inhalation of agents that induce constriction of the bronchi in healthy adults. This response is absent in adult asthmatics; however, there is data demonstrating that use of continuous positive airway pressure (CPAP) for short periods of time may decrease airway reactivity in adult asthmatics. This suggests that although deep inspirations may not result in decreased airway reactivity, sustained lung inflation may lead to changes in asthmatic airway smooth muscle structure that lead to a decrease in airway reactivity. The purpose of our study is to determine whether short and long term use of CPAP in children and adults leads to decreased airway reactivity. If airway reactivity is decreased with CPAP, this may provide a novel therapeutic strategy for patients with asthma.
|United States, Indiana|
|Riley Hospital for Children|
|Indianapolis, Indiana, United States, 46202|
|Principal Investigator:||Robert S. Tepper, MD, PhD||Indiana University|
|Study Director:||Mike Busk, MD||NIFS/ Indiana University|