Detecting Lung Infections Through Vibration

March 15, 2016 updated by: University of Florida

Feasibility and Optimization of High Frequency Oscillation (HFO) for Detection of Lung Infections

The purpose of this study is to test a lung air vibrator device for vibrating air inside the lung. This exploratory diagnostic trial will test a novel and non-invasive means of detecting lower airway infections using exhaled breath sample.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

This study has two phases. Once the subject has consented phase 1 will start by the subject breathing air out of their lungs into the device. Next, the subject will simply breathe through the mouthpiece with the machine turned on and take samples of exhaled air.

In phase 2, the subjects will breathe air out of their lungs into the device for 15 minutes. Next, the subject will simply breathe through the mouthpiece with the machine turned on and take samples of exhaled air for 15 minutes.

Study Type

Observational

Enrollment (Actual)

16

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
    • Florida
      • Gainesville, Florida, United States, 32610
        • University of Florida

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 50 years (ADULT)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Healthy normal adults age 18 to 50 Individuals with cystic fibrosis

Description

Inclusion Criteria:

  • Age 18-50

Exclusion Criteria:

  • History of major respiratory compromise (except cystic fibrosis if included within cystic fibrosis cohort)

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

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Group 1 will receive 15 Hz
Group 1 (n=30), these subjects will receive 10 minutes of High Frequency Oscillation at 15 Hz at .75 cm on day 1. Then will have a 24 hour washout. On day 2 will receive 10 minutes of low Frequency Oscillation at 15 Hz at 1.25 cm.
Procedure: Group 1 will receive 15 Hz
Group 1 (n=30), these subjects will receive 10 minutes of High Frequency Oscillation at 15 Hz at .75 cm on day 1. Then will have a 24 hour washout. On day 2 will receive 10 minutes of low Frequency Oscillation at 15 Hz at 1.25 cm.
Group 2 will receive 30 Hz
Group 2 (n=30), these subjects will receive 10 minutes of High Frequency Oscillation at 30 Hz at .75 cm on day 1. Then will have a 24 hour washout. On day 2 will receive 10 minutes of low Frequency Oscillation at 30 Hz 1.25 cm.
Procedure: Group 2 will receive 30 Hz
Group 2 (n=30), these subjects will receive 10 minutes of High Frequency Oscillation at 30 Hz at .75 cm on day 1. Then will have a 24 hour washout. On day 2 will receive 10 minutes of low Frequency Oscillation at 30 Hz 1.25 cm.
Group 3 will receive 60 Hz
Group 3 (n=30), these subjects will receive 10 minutes of High Frequency Oscillation at 60 Hz 2 .75 cm on day 1. Then will have a 24 hour washout. On day 2 will receive 10 minutes of low Frequency Oscillation at 60 Hz at 1.25 cm.
Procedure: Group 3 will receive 60 Hz
Group 3 (n=30), these subjects will receive 10 minutes of High Frequency Oscillation at 60 Hz .75 cm on day 1. Then will have a 24 hour washout. On day 2 will receive 10 minutes of low Frequency Oscillation at 60 Hz at 1.25 cm.
Group 4 will receive 100 Hz
Group 4 (n=30), these subjects will receive 10 minutes of High Frequency Oscillation at 100 Hz at .75 cm on day 1. Then will have a 24 hour washout. On day 2 will receive 10 minutes of low Frequency Oscillation at 100 Hz at 1.25 cm.
Procedure: Group 4 will receive 100 Hz
Group 4 (n=30), these subjects will receive 10 minutes of High Frequency Oscillation at 100 Hz at .75 cm on day 1. Then will have a 24 hour washout. On day 2 will receive 10 minutes of low Frequency Oscillation at 100 Hz at 1.25 cm.
Phase II Optimal Frequency
Participants in Phase II will undergo 10 minutes of HFO at the optimal frequency as determined during Phase I.
Procedure: Phase II Optimal Frequency
Participants in Phase II will undergo 10 minutes of HFO at the optimal frequency as determined during Phase I.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Optimal Operating Conditions for HFO Device
Time Frame: 6 months
Following informed consent procedures, participants will be randomly assigned (much like a flip of a coin) to one of four experimental groups in order to test the effects of various frequencies of HFO on the size and concentration of particles obtained from EB. Group 1 (n=30) will receive 10 minutes of HFO at 15 Hz. Group 2 (n=30) will receive an identical course of HFO with the frequency set at 30 Hz. Group 3 (n=30) will receive HFO at 60 Hz and Group 4 (n=30) at 100 Hz. Participants will be tested on two separate days in order to systematically vary HFO intensity. Once again, much like a flip of a coin, each participant will be randomly assigned to receive HFO at either a low (0.75 cmH2O) or high (1.25 cm H2O) intensity on HFO Day 1. Participants receiving low intensity HFO on Day 1 will receive high intensity HFO on Day 2, and vice versa. Between HFO Testing Day 1 and 2 there will be a washout period of at least 24 hours.
6 months

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Particle size and distribution from exhaled breath
Time Frame: One year
The exhaled air will be directed to a culturing media in place of the Sizer for collection of the droplets during two conditions: tidal breathing without oscillation (control) and tidal breathing with oscillation (experimental). The samples collected in the medium will later be cultured in a lab to determine the microbial species and their abundances. The purpose of Phase II experiments is to characterize the biological constituents produced from the oscillation enhanced sampling and contrast these constituents with those obtained during non-oscillation enhanced sampling. We hope to determine if the addition of oscillation increases the variety and abundance of microbial species able to be extracted from exhaled breath.
One year

Collaborators and Investigators

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

Sponsor

University of Florida

Investigators

  • Principal Investigator: Erin P Silverman, PhD, University of Florida

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

February 1, 2014

Primary Completion (ACTUAL)

December 1, 2015

Study Completion (ACTUAL)

December 1, 2015

Study Registration Dates

First Submitted

January 30, 2014

First Submitted That Met QC Criteria

February 4, 2014

First Posted (ESTIMATE)

February 6, 2014

Study Record Updates

Last Update Posted (ESTIMATE)

March 16, 2016

Last Update Submitted That Met QC Criteria

March 15, 2016

Last Verified

March 1, 2016

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 821-2013

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Afshar-Mohajer N, Wu CY, Tsai HW, Silverman E, Davenport P, Hegde S. Optimizing an Internal Airway Percussion Device for Facilitating Exhalate Diagnostics of the Human Respiratory System. J Aerosol Med Pulm Drug Deliv. 2015 Mar 31. [Epub ahead of print] PubMed PMID: 25826647.

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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