Detecting oxygen desaturation in patients with COPD: Incremental versus endurance shuttle walking

Summary Background There has been no direct comparison between an incremental and endurance walking test to detect the relative oxygen desaturation in patients with chronic obstructive pulmonary disease (COPD). This is of some importance as current guidelines have suggested that ambulatory oxygen sh...

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Bibliographic Details
Published in:Respiratory medicine 2008-08, Vol.102 (8), p.1148-1152
Main Authors: Sandland, C.J, Morgan, M.D.L, Singh, S.J
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
Ambulatory Care - methods
Ambulatory oxygen therapy
Biological and medical sciences
Chronic obstructive pulmonary disease (COPD)
Chronic obstructive pulmonary disease, asthma
Double-Blind Method
Exercise Test - methods
Female
Forced Expiratory Volume
Humans
Male
Medical sciences
Middle Aged
Oxygen - blood
Oxygen Inhalation Therapy - methods
Partial Pressure
Physical Endurance
Pneumology
Pulmonary Disease, Chronic Obstructive - blood
Pulmonary Disease, Chronic Obstructive - physiopathology
Pulmonary Disease, Chronic Obstructive - therapy
Pulmonary/Respiratory
Walking
Walking tests
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Summary:Summary Background There has been no direct comparison between an incremental and endurance walking test to detect the relative oxygen desaturation in patients with chronic obstructive pulmonary disease (COPD). This is of some importance as current guidelines have suggested that ambulatory oxygen should only be prescribed after a standard assessment and desaturation documented. No clear advice about the nature of the required exercise task is given. This study therefore compared the relative desaturation between the incremental shuttle walking test (ISWT) and the constant speed walking test (ESWT) and response to ambulatory oxygen. Methods Forty-one patients (29 male), mean (SD), age 71.18 (7.48) yrs, FEV1 0.85 (0.29) l with stable COPD were recruited after completion of a 7-week pulmonary rehabilitation programme. Patients completed a baseline (without carrying a cylinder) ISWT and ESWT and then, in random order in double blind fashion, completed the walk tests with a cylinder of air or a cylinder of oxygen. Measurements included distance walked, oxygen saturation, heart rate, perceived breathlessness and exertion (Borg scale). Results All patients desaturated (
ISSN:0954-6111
1532-3064
DOI:10.1016/j.rmed.2008.03.007