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- Titel:
Short-term Effects of Supplemental Oxygen on 6-Min Walk Test Outcomes in Patients With COPD: A Randomized, Placebo-Controlled, Single-blind, Crossover Trial.
- Dokumenttyp:
- Journal Article; Randomized Controlled Trial; Article
- Autor(en):
- Jarosch, Inga; Gloeckl, Rainer; Damm, Eva; Schwedhelm, Anna-Lena; Buhrow, David; Jerrentrup, Andreas; Spruit, Martijn A; Kenn, Klaus
- Abstract:
- The acute effect of supplemental oxygen during exercise has been shown to differ largely among patients with COPD. It is unknown what factors influence oxygen response.In a randomized, single-blind fashion, 124 patients with COPD underwent one 6-min walk test on supplemental oxygen (6MWTO2) and one 6-min walk test on room air after a practice 6-min walk test. Both gases were delivered via standard nasal prongs (2 L/min). For analyses, patients were stratified on the basis of PaO2 values and compared: (1) 34 patients with resting hypoxemia (HYX); (2) 43 patients with exercise-induced hypoxemia (EIH); and (3) 31 patients with normoxemia (NOX).Oxygen supplementation resulted in an increase in the 6-min walk distance in the total cohort (27 ± 42 meters; P < .001) and in the subgroups of HYX (37 ± 40 meters; P < .001) and EIH (28 ± 44 meters; P < .001) but not in the NOX subgroup (15 ± 43 meters; P = .065). Forty-two percent of patients with HYX and 47% of patients with EIH improved their 6-min walk distance to a clinically relevant extent (>= 30 meters) by using oxygen. These oxygen responders were characterized by significantly lower 6-min walk distance using room air compared with patients without a relevant response (306 ± 106 meters vs 358 ± 113 meters; P < .05). Although oxygen saturation was significantly higher during 6MWTO2 compared with the 6-min walk test on room air in all 3 subgroups, it dropped to < 88% during 6MWTO2 in 73.5% of patients with HYX.In contrast to patients with NOX, patients with HYX and EIH generally benefit from supplemental oxygen by increasing exercise capacity. However, less than one-half of patients reached the threshold of clinically relevant improvements. These oxygen responders were characterized by significantly lower exercise capacity levels.ClinicalTrials.gov; No.: NCT00886639; URL: www.clinicaltrials.gov.
- Zeitschriftentitel:
- Chest
- Jahr:
- 2017
- Band / Volume:
- 151
- Heft / Issue:
- 4
- Seitenangaben Beitrag:
- 795-803
- Sprache:
- eng
- Volltext / DOI:
- doi:10.1016/j.chest.2016.11.044
- PubMed:
- http://view.ncbi.nlm.nih.gov/pubmed/27940278
- Print-ISSN:
- 0012-3692
- TUM Einrichtung:
- Poliklinik für Präventive und Rehabilitative Sportmedizin
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