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Correction of Exercise-induced Desaturation by Acute Oxygen Supply and Exercise Responses in COPD (RePox-1)

7. juli 2015 oppdatert av: 5 Santé

Does Correction of Exercice-induced Desaturation by O2 Improve Systematically Exercise Tolerance in COPD Patients ?

In the literature, the effects of acute oxygen administration on exercise tolerance and related symptoms have often appeared to be contradictory. Some investigations have reported benefits from acute oxygen supply during exertion, including increased exercise performance, reduced dyspnea, and better cardiorespiratory adaptations, whereas other studies have reported no improvement. Recently, we advanced then the hypothesis that some patients would be non-responders and even worsen under oxygen treatment. The preliminary results confirmed our hypothesis since we demonstrated that while 56% of the patients were improved with supplemental oxygen, 16% were non-responders and 28% were negative-responders (decreased performance and increased dyspnea during endurance exercise with supplemental oxygen). However, this was a pilot study offering preliminary insights and tentative conclusions that must be confirmed in a larger case series.

The aims of this retrospective study was :

To confirm on cohorte and with clinical test (the 6-minute walking test - 6WT) the deleterious responses to acute oxygen supplementation in LTOT (long terme oxygenotherapy treatment) and non-LTOT patients who exhibit exercise desaturation.
To identify the predictive factors among the clinical data (i.e., anthropometric, spirometric and gazometric data) and/or functional data recorded during rehabilitation program

Studieoversikt

Status

Fullført

Forhold

Detaljert beskrivelse

During this study, a retrospective data collection will be carried out using the informations contained in the medical folders of patients admitted in our centers for pulmonary rehabiliation program.

We will select patients who meet the following criteria:

A) patients having two 6WT early in their program B) who desaturate (SpO2 <90% for 3 consecutive min) during the first 6WT and who will have been properly corrected with a supply of oxygen during the second walk test.

The analyzed parameters will be distance and dyspnea during the tests

Studietype

Observasjonsmessig

Registrering (Faktiske)

255

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

Frankrike
- - Lodeve, Frankrike, 34800
    - Clinique du Souffle La Vallonie
  - Osséjà, Frankrike, 66340
    - Clinique du Souffle la Solane

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

40 år til 90 år (Voksen, Eldre voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Prøvetakingsmetode

Sannsynlighetsprøve

Studiepopulasjon

Patients with chronic obstructive pulmonary disease and exhibiting an exercise-induced desaturation during six minute walkink test.

Beskrivelse

Inclusion Criteria:

Obstructive airflow limitation defined by FEV1/CVF < 70% and FEV1 < 80 %
Patients with or without long terme oxygenotherapy
Patients exhibited during the first test, an exercise-induced desaturation, defined by SaO2 < 90% for 3 consecutive minutes during the 6-minute walking test in the air condition for non-LTOT or with the flow normally recommended during exercise for LTOT patients (i.e., flow rate of rest + 1L/min)
Patients with no desaturation during the test with oxygen supply

Exclusion Criteria:

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

Antall grupper / kohorter

Kohorter og intervensjoner

Gruppe / Kohort
Positive responders Positive responders (R+): patients exhibiting an increase in the 6WT distance ≥ 10% and/or a decrease in dyspnea ≥ 10% (i.e., ≥ 1 point on the visual analogue scale).
negative responders Negative responders(R-): patients exhibiting a decrease in the distance ≥ 10% and/or an increase in dyspnea ≥ 10%.

Hva måler studien?

Primære resultatmål

Resultatmål	Tidsramme
Distance of six minute walking test (meter) Tidsramme: Baseline	Baseline

Sekundære resultatmål

Resultatmål	Tidsramme
Dyspnea during the 6 minute walking test Tidsramme: Baseline	Baseline

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

5 Santé

Etterforskere

Studieleder: Nelly N HERAUD, Pd-D, 5 Santé

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Generelle publikasjoner

Heraud N, Prefaut C, Durand F, Varray A. Does correction of exercise-induced desaturation by O(2) always improve exercise tolerance in COPD? A preliminary study. Respir Med. 2008 Sep;102(9):1276-86. doi: 10.1016/j.rmed.2008.04.005. Epub 2008 Jul 10.

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart

1. februar 2014

Primær fullføring (Faktiske)