Dynamic Ventilatory and Asymmetry of the Chest Wall During Breath Stacking and Volume-oriented Incentive Spirometer

Dynamic Ventilatory and Asymmetry of the Chest Wall During Breath Stacking and Volume-oriented Incentive Spirometer in Patients After Stroke: Crossover Clinical Trial

The purpose of the study was to analyze the effect of IS and BS on dynamics ventilatory and asymmetry of the chest wall in patients after stroke .

All volunteers were undergone to two types of pulmonary expansion therapy (PET) techniques: volume incentive spirometry (VIS) and BS.

Procedures involved two distinct phases: assessment and intervention. In the first day was performed assessment of the participants to obtain the following data: anamnesis, initial evaluation using the Ashwouth Scale, Barthel Index and Mini Mental State Examination, anthropometric data and pulmonary function using spirometry and respiratory muscle pressures.

Intervention phase was performed in two different days, each day for only one PET techniques (VIS or BS), with a minimal wash-out period of one day according to the randomization sequence. Optoelectronic Pletysmography (OEP) was recorded during quite breathing at rest and during the execution of five maneuvers form each PET technique tested.

Inclusion Criteria:Subjects with right hemiparesis due to stroke for more than three months, of both genders, most than 20 years, with scores between 1 and 3 for Ashworth Scale for upper limb, up to 85 for Index score Barthel and minimum score of 18 on the Mini Mental State Examination.

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Exclusion Criteria: Facial paralysis, rheumatic or orthopedic diseases or deformities / abnormalities in the spine that could compromise the respiratory mechanics; reported respiratory conditions (asthma, chronic obstructive pulmonary disease, cystic fibrosis) or presenting spirometry with forced expiratory volume in one second (FEV1) below 80% predicted and compared VEF1/Capacitate Forced vital ≤ .7; history of recent abdominal or thoracic surgery and hemodynamic instability or pregnancy.

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