Diaphragm Activity During Incentive Spirometry and Diaphragmatic Breathing
The objective of the present study is to evaluate diaphragm activity during three breathing exercises: diaphragmatic breathing (DB), flow-oriented (Triflo II)incentive spirometry and volume-oriented (Voldyne) incentive spirometry.
Seventeen healthy subjects will be studied (8 man and 9 woman).
Device: DB, VI and FI
|Study Design:||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Crossover Assignment
Masking: Single Blind (Investigator)
Primary Purpose: Treatment
|Official Title:||Diaphragm Mobility During Respiratory Exercises With Incentive Spirometry in Healthy Individuals|
- ultrasound evaluation of the diaphragm mobility [ Time Frame: six - eight months ] [ Designated as safety issue: Yes ]
- pulmonary function test [ Time Frame: six - eight months ] [ Designated as safety issue: Yes ]
|Study Start Date:||October 2009|
|Study Completion Date:||May 2010|
|Primary Completion Date:||May 2010 (Final data collection date for primary outcome measure)|
Experimental: DB, VI and FV
Device: DB, VI and FI
Two modalities of respiratory exercises based on deep and slow inspirations will be used: DB and IS. During DB, the researcher will place one hand slightly below the lower ribs in the abdominal region of the subject and the subject will be instructed to perform inspirations up to the maximum level of volume avoiding rib cage displacement; this recommendation will also be valid for exercises using incentive spirometers. IS will be executed using two different devices: Triflo II and Voldyne.
Right diaphragmatic mobility will be evaluated by determining the craniocaudal displacement of the left branch of the portal vein using a B-mode ultrasound device (Logic 500, Pro Series®; General ElectricMedical Systems, Milwaukee, WI, USA). The ultrasound technician will use a 3.5 MHz convex transducer positioned in the right subcostal region, with the incidence angle perpendicular to the craniocaudal axis, in the direction of the inferior vena cava. Next, an intraparenchymal portal branch will be identified in the field of vision and its position will be traced with the curser during the forced inspiration and expiration. The craniocaudal displacement of these points will be considered to be the amount of right diaphragmatic mobility.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00997737
|Instituto de Ensino e Pesquisa do Hospital Sírio Libanês|
|São Paulo, SP, Brazil, 01308-050|
|Principal Investigator:||Wellington P Yamaguti, Master||Hospital Sírio Libanês|