Investigation of Efficiency of Breathing With Different Breathing Patterns

NCT00784004 | Completed

• 1 other identifier: 2007-P-001371
• Study Type: interventional
• Target: 26
• Locations: 1 country
• Sites: 1

Brief Summary

Our aim in this study is to investigate the efficiency of the breathing with different breathing patterns. Ten volunteers and twenty patients having respiratory problems will be coached on their breathing through specific masks which will provide four different breathing patterns. These patterns will be 1) Breathing in through the nose only and out through the mouth only 2) Breathing in through the mouth only and out through the nose only 3) Breathing in and out through the nose only 4) Breathing in and out through the mouth only The data obtained from volunteers and patients will be compared within and between the groups.

Conditions

Respiratory Physiology; Respiratory Insufficiency; Breathing Patterns

Keywords

breathing patterns,; unidirectional breathing,; mask ventilation,; respiratory physiology

Outcome Measures

Primary Outcomes (2)

• Determining the anatomic dead space change at variable tidal volumes with four different breathing patterns (nose-in and nose-out, mouth-in and mouth-out, nose-in and mouth-out, mouth-in and nose-out) in healthy volunteers.

  3 months

• Comparing the efficiency of CO2 removal at given minute ventilations with the four different breathing patterns in patients with chronic respiratory failure.

  6 months

Secondary Outcomes (1)

• Comparing the efficiency of the study mask which forces subjects to breathe in a manner similar to pursed lip breathing and a regular facemask in healthy volunteers and patients with respiratory failure

  6 months

Study Arms (2)

Volunteers

OTHER

Ten healthy volunteers

Other: Breathing Patterns

Patients

OTHER

Sixteen patients with respiratory insufficiency

Other: Breathing Patterns

Interventions

Breathing Patterns OTHER

All subjects will breathe in four different breathing patterns which are provided by specific masks. Patterns are as the following: 1. Breathing in through the nose only and out through the mouth only 2. Breathing in through the mouth only and out through the nose only 3. Breathing in and out through the nose only 4. Breathing in and out through the mouth only

Patients; Volunteers

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• For healthy subjects:
• \. Ten healthy adult (\> 18 years of age) volunteers will be recruited from the MGH main campus through intra-hospital e-mail broadcasting. Subjects with the following issues will be excluded from the study.
• For patients with respiratory insufficiency:
• Twenty adult (\> 18 years of age) patients will be recruited. These patients will be either patients in acute respiratory failure resulting from COPD exacerbation breathing spontaneously only receiving nasal oxygen admitted to the medical floors of the MGH; or patients with diagnosed stable COPD on home oxygen therapy seen by pulmonary physicians in the outpatient clinics or coming to the MGH as study subjects.

You may not qualify if:

• For healthy volunteers:
• Subjects with facial deformity, heavy beard or moustache which prevents good seal between the mask and the face;
• Subjects who have claustrophobia and cannot wear the mask.
• For patients with respiratory insufficiency:
• Patients with facial deformity, heavy beard or moustache which prevents a good seal between the mask and the face;
• Patients who have claustrophobia and cannot wear the mask.
• Patients who are hemodynamically unstable.
• Patients requiring continuous noninvasive positive pressure ventilation or endotracheal intubation.

Sponsors & Collaborators

• Massachusetts General Hospital: lead

Study Sites (1)

Massachusetts General Hospital, Respiratory Care Laboratory

Boston, Massachusetts, 02114, United States

Location

Related Publications (1)

• Sulemanji DS, Bao F, Jiang Y, Kacmarek RM. A unidirectional breathing pattern improves breathing efficiency in subjects with severe COPD. Respir Care. 2014 Oct;59(10):1487-93. doi: 10.4187/respcare.02899. Epub 2014 Apr 29.

  PMID: 24782549 DERIVED

MeSH Terms

Conditions

Respiratory Insufficiency

Condition Hierarchy (Ancestors)

Respiration Disorders; Respiratory Tract Diseases

Study Officials

• Yandong Jiang, MD, PhD

  Massachusetts General Hospital

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NON RANDOMIZED
• Masking: NONE
• Purpose: SUPPORTIVE CARE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Assistant Professor of Anesthesia

Study Record Dates

• First Submitted: October 30, 2008
• First Posted: November 3, 2008
• Study Start: November 1, 2007
• Primary Completion: June 1, 2011
• Study Completion: June 1, 2011
• Last Updated: December 2, 2014

Record last verified: 2014-12

Locations

US (1)