Abdominal Functional Electrical Stimulation to Reduce Hyperinflation in Chronic Obstructive Pulmonary Disease Patients

NCT ID: NCT02035228

Last Updated: 2018-08-15

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

7 participants

Study Classification

INTERVENTIONAL

Study Start Date

2013-03-31

Study Completion Date

2014-01-31

Brief Summary

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This is an early feasibility study to investigate whether transcutaneous electrical stimulation applied to the abdominal wall muscles synchronous with voluntary exhalation can be used to support ventilation and affect hyperinflation in patients with chronic obstructive pulmonary disease. As part of this study, the effect of a range of stimulation intensities and stimulation timing profiles will be explored.

Detailed Description

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Conditions

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Pulmonary Disease, Chronic Obstructive

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

SINGLE_GROUP

Primary Study Purpose

DEVICE_FEASIBILITY

Blinding Strategy

NONE

Study Groups

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Seated

Patients breathing will be compared across a series of 9 trials in which unassisted breathing is compared to abdominal stimulation (SecondBreath) assisted breathing at various intensities. Each breathing trial will last for 2 minutes and will be conducted while the patient is seated. The following abdominal stimulation trials were included:

Abdominal Stimulation - low / early Abdominal stimulation - low/late Abdominal Stimulation - low/full Abdominal stimulation - med/early Abdominal stimulation - med/late Abdominal Stimulation - med/full Abdominal Stimulation - high/early Abdominal Stimulation - high/late Abdominal Stimulation - high/full

Group Type EXPERIMENTAL

Abdominal Stimulation - low / early

Intervention Type DEVICE

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at low stimulation current for the first half of exhalation

Abdominal stimulation - low/late

Intervention Type DEVICE

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at low stimulation current for the second half of exhalation

Abdominal Stimulation - low/full

Intervention Type DEVICE

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at low stimulation current throughout exhalation

Abdominal stimulation - med/early

Intervention Type DEVICE

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at medium stimulation current for the first half of exhalation

Abdominal stimulation - med/late

Intervention Type DEVICE

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at medium stimulation current for the second half of exhalation

Abdominal Stimulation - med/full

Intervention Type DEVICE

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at medium stimulation current throughout exhalation

Abdominal Stimulation - high/early

Intervention Type DEVICE

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at high stimulation current for the first half of exhalation

Abdominal Stimulation - high/late

Intervention Type DEVICE

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at hig stimulation current for the second half of exhalation

Abdominal Stimulation - high/full

Intervention Type DEVICE

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at high stimulation current throughout exhalation

6 minute step test

Patients will complete a 6 minute step test with and without abdominal stimulation (SecondBreath).

Abdominal Stimulation - high/full

Group Type EXPERIMENTAL

Abdominal Stimulation - high/full

Intervention Type DEVICE

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at high stimulation current throughout exhalation

Interventions

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Abdominal Stimulation - low / early

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at low stimulation current for the first half of exhalation

Intervention Type DEVICE

Abdominal stimulation - low/late

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at low stimulation current for the second half of exhalation

Intervention Type DEVICE

Abdominal Stimulation - low/full

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at low stimulation current throughout exhalation

Intervention Type DEVICE

Abdominal stimulation - med/early

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at medium stimulation current for the first half of exhalation

Intervention Type DEVICE

Abdominal stimulation - med/late

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at medium stimulation current for the second half of exhalation

Intervention Type DEVICE

Abdominal Stimulation - med/full

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at medium stimulation current throughout exhalation

Intervention Type DEVICE

Abdominal Stimulation - high/early

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at high stimulation current for the first half of exhalation

Intervention Type DEVICE

Abdominal Stimulation - high/late

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at hig stimulation current for the second half of exhalation

Intervention Type DEVICE

Abdominal Stimulation - high/full

Transcutaneous electrical stimulation applied to the abdominal wall muscles in synchronous with volitional exhalation.

Stimulation is applied at high stimulation current throughout exhalation

Intervention Type DEVICE

Other Intervention Names

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SecondBreath SecondBreath SecondBreath SecondBreath SecondBreath SecondBreath SecondBreath SecondBreath SecondBreath

Eligibility Criteria

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Inclusion Criteria

* Post-bronchodilator FEV1/FVC ratio of less than 0.7 and post-bronchodilator FEV1 between 30 and 80 % predicted.
* Current or former smokers with at least a 20 pack year smoking history
* Over the age of forty

Exclusion Criteria

* Female subjects who are pregnant
* Subjects unable to give informed consent
* Subjects unable to perform required activities of the study (e.g. Six minute walk test)
* Subjects with an implanted electronic device (e.g. a cardiac pacemaker)
* Subjects who have had a chronic obstructive pulmonary disease exacerbation within 30 days prior to enrollment
* Considerable arthritic changes that limit exertion
* Patients on oral prednisone
* Patients with a hernia
* Patients with a history of pneumothorax within the last 5 years
* History of epilepsy
* History of Abnormal electrocardiogram suggestive of cardiac disease
Minimum Eligible Age

40 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Liberate Medical

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Rodney Folz, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Louisville

Locations

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University of Louisville

Louisville, Kentucky, United States

Site Status

Countries

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United States

Other Identifiers

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LM-SB-001

Identifier Type: -

Identifier Source: org_study_id

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