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CO2-Patterns During Hyperoxia and Physical Exercise in COPD

13 de julho de 2021 atualizado por: Klaus Kenn, Schön Klinik Berchtesgadener Land

CO2-Patterns During Hyperoxia and Physical Exercise in People With Severe COPD - a Randomized, Double-blind Cross Over Trial

The aim of the study is to investigate a possible correlation between the change in PCO2 during a hyperoxia-test and the change in PCO2 during walking in people with COPD

Visão geral do estudo

Status

Recrutamento

Condições

Descrição detalhada

Rationale:

Carbon dioxide partial pressure (PCO2) varies significantly in patients with advanced chronic obstructive pulmonary disease (COPD). Data from the Swedish LTOT Registry showed that PCO2 is an independent predictor for mortality and that there is a U-shaped relationship. Patients with advanced COPD who are still normocapnic at rest may still develop a clinically relevant, exercise-induced carbon dioxide (CO2) retention during exercise/ activity. It is also known that altered breathing patterns at night in COPD patients can lead to nocturnal hypercapnia, especially during REM sleep. The course of PCO2 cannot be reliably predicted by lung function parameters or resting blood gas analysis. Since exercise tests with blood gas control or nightly PCO2 monitoring are rarely performed in clinical routine, exercise induced CO2 retention often remains undetected. In the literature, there is little information on PCO2 behaviour under everyday conditions (with or without LTOT) such as rest, physical exertion and nightly sleep. Therefore, predictors that could describe the PCO2 patterns are missing. However, one former study by O'Donnel from 2002 showed that the change in CO2 under hyperoxia conditions could provide predictive information for the change in CO2 with exercise.

Objective:

Primary aim of this study is to investigate whether the change of PCO2 during a hyperoxia-test (10l/min O2 at rest) correlates with the change of PCO2 during walking exercise with either a: l/min O2 as prescribed; b: medical air; c: 10l/min O2.

Design:

This study is a randomized, controlled cross-over trial. Following an initial maximal incremental shuttle walk test (ISWT), the participant will perform 3 endurance shuttle walk tests (ESWT) at 85% of the maximum ISWT pace on three consecutive days (24h break between ESWTs). In a randomized order, participants will perform one ESWTs with O2-flow as prescribed (e.g. study day 1), one with medical air (same flow rate as prescribed oxygen) (e.g. study day 2) and one with 10l/min O2 (e.g. study day 3). An additional hyperoxia test (10l/min O2 for ten minutes; at resting condition) will be perfomed on each day prior to performing an ESWT.

Tipo de estudo

Intervencional

Inscrição (Antecipado)

55

Estágio

  • Não aplicável

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

Locais de estudo

      • Schönau am Königssee, Alemanha, 83471
        • Recrutamento
        • Klinikum Berchtesgadener Land, Schön Kliniken
        • Contato:

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

  • Filho
  • Adulto
  • Adulto mais velho

Aceita Voluntários Saudáveis

Não

Gêneros Elegíveis para o Estudo

Tudo

Descrição

Inclusion Criteria:

  • COPD III/ IV
  • 35mmHg < PCO2 <= 55mmHg (under resting conditions, breathing room air)
  • Hypoxemia (PaO2<60mmHg) under room air conditions (rest or during exercise) or SpO2 <88% during exercise
  • established oxygen therapy or given indication for oxygen therapy
  • written informed consent

Exclusion Criteria:

  • acute exacerbation of COPD
  • exercise limiting cardiac or orthopedic comorbidites
  • PaO2 <50mmHg at rest, breathing room air

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Tratamento
  • Alocação: Randomizado
  • Modelo Intervencional: Atribuição cruzada
  • Mascaramento: Dobro

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Randomised to begin with oxygen-supplementation at 10L/min during ESWT
Randomised order of tests starting with the 10L/min O2, during the ESWT followed by prescribed O2 flow rate or medical air in randomised order on seperate days
Supplemental O2 at rest of 10 l/min for ten minutes followed by supplemental O2 at the prescribed exercise O2-flow rate during ESWT.
Supplemental O2 at rest of 10 l/min for ten minutes followed by medical Air at prescribed O2 flow rate during ESWT.
Supplemental O2 at rest of 10 l/min for ten minutes followed by 10L/min O2 during ESWT.
Experimental: Randomised to begin with medical air supplementation at prescibed O2 flow rate during ESWT
Randomised order of tests starting with the medical air during the ESWT followed by prescribed O2 flow rate or 10L/min O2 in randomised order on seperate days
Supplemental O2 at rest of 10 l/min for ten minutes followed by supplemental O2 at the prescribed exercise O2-flow rate during ESWT.
Supplemental O2 at rest of 10 l/min for ten minutes followed by medical Air at prescribed O2 flow rate during ESWT.
Supplemental O2 at rest of 10 l/min for ten minutes followed by 10L/min O2 during ESWT.
Experimental: Randomised to begin with oxygen supplementation at prescibed O2 flow rate during ESWT
Randomised order of tests starting with the prescribed O2 flow rate, during the ESWT followed by 10L/min O2 or medical air in randomised order on seperate days
Supplemental O2 at rest of 10 l/min for ten minutes followed by supplemental O2 at the prescribed exercise O2-flow rate during ESWT.
Supplemental O2 at rest of 10 l/min for ten minutes followed by medical Air at prescribed O2 flow rate during ESWT.
Supplemental O2 at rest of 10 l/min for ten minutes followed by 10L/min O2 during ESWT.

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Change in PCO2 during hyperoxia at rest
Prazo: Change from baseline to after 10 minutes breathing 10L/min oxygen
pCO2 measured by capillary blood gases taken before and after the hyperoxia test
Change from baseline to after 10 minutes breathing 10L/min oxygen
Change in PCO2 from rest to end exercise (endurance shuttle walk test)
Prazo: Change from baseline to the end of the ESWT, up to 20 minutes
pCO2 measured by capillary blood gases taken before and after the ESWT
Change from baseline to the end of the ESWT, up to 20 minutes

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Transcutaneous partial pressure of CO2 (TcPCO2) during hyperoxia test
Prazo: Continuously from baseline to 10 minutes breathing 10L/min oxygen
TcPCO2 measured by continuous transcutaneous recording via Sentec-Digital Monitor® (Sentec, Therwil, Switzerland)
Continuously from baseline to 10 minutes breathing 10L/min oxygen
Transcutaneous partial pressure of CO2 (TcPCO2) during endurance shuttle walk test
Prazo: Continuously during ESWT, up to 20 minutes
TcPCO2 measured by continuous transcutaneous recording via Sentec-Digital Monitor® (Sentec, Therwil, Switzerland)
Continuously during ESWT, up to 20 minutes
Breathing frequency during hyperoxia test
Prazo: Continuously from baseline to 10 minutes breathing 10L/min oxygen
Breathing frequency during the hyperoxia test measured by ApneaLink Air™ (ResMed)
Continuously from baseline to 10 minutes breathing 10L/min oxygen
Breathing frequency during endurance shuttle walk test
Prazo: Continuously during ESWT, up to 20 minutes
Breathing frequency during the ESWT measured by ApneaLink Air™ (ResMed)
Continuously during ESWT, up to 20 minutes
Heart rate during endurance shuttle walk test
Prazo: Continuously during ESWT, up to 20 minutes
Heart rate measured by continuous transcutaneous recordung via Sentec-Digital Monitor® (Sentec, Therwil, Switzerland)
Continuously during ESWT, up to 20 minutes
Heart rate during hyperoxia test
Prazo: Continuously from baseline to 10 minutes breathing 10L/min oxygen
Heart rate measured by continuous transcutaneous recordung via Sentec-Digital Monitor® (Sentec, Therwil, Switzerland)
Continuously from baseline to 10 minutes breathing 10L/min oxygen
Change of capillary partial pressure of O2 (pO2) during endurance shuttle walk test
Prazo: Change from baseline to the end of the ESWT, up to 20 minutes
pO2 measured by capillary blood gases taken before and after the ESWT
Change from baseline to the end of the ESWT, up to 20 minutes
Change of inspiratory capacity during endurance shuttle walk test
Prazo: Change from baseline to the end of the ESWT, up to 20 minutes
IC measured by SpiroSense (Pari) before and after the ESWT
Change from baseline to the end of the ESWT, up to 20 minutes

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Datas de registro do estudo

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Datas Principais do Estudo

Início do estudo (Real)

13 de julho de 2021

Conclusão Primária (Antecipado)

1 de maio de 2022

Conclusão do estudo (Antecipado)

1 de maio de 2022

Datas de inscrição no estudo

Enviado pela primeira vez

4 de maio de 2021

Enviado pela primeira vez que atendeu aos critérios de CQ

5 de julho de 2021

Primeira postagem (Real)

9 de julho de 2021

Atualizações de registro de estudo

Última Atualização Postada (Real)

14 de julho de 2021

Última atualização enviada que atendeu aos critérios de controle de qualidade

13 de julho de 2021

Última verificação

1 de julho de 2021

Mais Informações

Termos relacionados a este estudo

Termos MeSH relevantes adicionais

Outros números de identificação do estudo

  • CO2-Hyperoxia & Exercise

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

SIM

Tipo de informação de suporte de compartilhamento de IPD

  • PROTOCOLO DE ESTUDO
  • CIF

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Não

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .

Ensaios clínicos em DPOC

Ensaios clínicos em Oxygen therapy

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