Document Detail


Effects of proportional assisted ventilation on exercise performance in idiopathic pulmonary fibrosis patients.
MedLine Citation:
PMID:  19716690     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Patients with idiopathic pulmonary fibrosis (IPF) present an important ventilatory limitation reducing their exercise capacity. Non-invasive ventilatory support has been shown to improve exercise capacity in patients with obstructive diseases; however, its effect on IPF patients remains unknown. OBJECTIVE: The present study assessed the effect of ventilatory support using proportional assist ventilation (PAV) on exercise capacity in patients with IPF. METHODS: Ten patients (61.2+/-9.2 year-old) were submitted to a cardiopulmonary exercise testing, plethysmography and three submaximal exercise tests (60% of maximum load): without ventilatory support, with continuous positive airway pressure (CPAP) and PAV. Submaximal tests were performed randomly and exercise capacity, cardiovascular and ventilatory response as well as breathlessness subjective perception were evaluated. Lactate plasmatic levels were obtained before and after submaximal exercise. RESULTS: Our data show that patients presented a limited exercise capacity (9.7+/-3.8 mL O(2)/kg/min). Submaximal test was increased in patients with PAV compared with CPAP and without ventilatory support (respectively, 11.1+/-8.8 min, 5.6+/-4.7 and 4.5+/-3.8 min; p<0.05). An improved arterial oxygenation and lower subjective perception to effort was also observed in patients with IPF when exercise was performed with PAV (p<0.05). IPF patients performing submaximal exercise with PAV also presented a lower heart rate during exercise, although systolic and diastolic pressures were not different among submaximal tests. Our results suggest that PAV can increase exercise tolerance and decrease dyspnoea and cardiac effort in patients with idiopathic pulmonary fibrosis.
Authors:
E V Moderno; W P S Yamaguti; G P P Schettino; R A Kairalla; M A Martins; C R R Carvalho; C R F Carvalho
Publication Detail:
Type:  Evaluation Studies; Journal Article     Date:  2009-08-28
Journal Detail:
Title:  Respiratory medicine     Volume:  104     ISSN:  1532-3064     ISO Abbreviation:  Respir Med     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2010-02-03     Completed Date:  2010-09-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8908438     Medline TA:  Respir Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  134-41     Citation Subset:  IM    
Copyright Information:
Copyright 2009 Elsevier Ltd. All rights reserved.
Affiliation:
Department of Physical Therapy, School of Medicine, University of São Paulo, 51, São Paulo, 05360-160 SP, Brazil.
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MeSH Terms
Descriptor/Qualifier:
Aged
Anthropometry
Exercise Test
Exercise Tolerance / physiology*
Female
Humans
Idiopathic Pulmonary Fibrosis / physiopathology*,  rehabilitation
Male
Middle Aged
Oxygen Consumption
Pulmonary Ventilation / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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