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Assessment of Lung Function (Lufu) at Sea Level LA vs. High Altitude HA in Healthy Individuals

31 de agosto de 2026 atualizado por: Silvia Ulrich Somaini

Effect of a One-week Descent From 2850m to Sea Level and Re-ascent in Patients With Pulmonary Arterial Hypertension and Healthy Controls Permanently Living > 2600m on Pulmonary Hemodynamics, Exercise Capacity, Blood Oxygenation, Sleep Disordered Breathing and Further Outcomes

To study the effect of a re-ascent to high altitude (Quito Ecuador: 2850m) after a one-week stay at sea level (after prior descent from 2850m) on lung function and pulmonary resistance/reactance in healthy individuals, who live permanently > 2600m.

Visão geral do estudo

Status

Ainda não está recrutando

Condições

Intervenção / Tratamento

Descrição detalhada

The aim of this research is to investigate the lung function and pulmonary resistance/reactance before and after re-ascent (sea level for 7 days after prior descent from 2850m vs. re-ascent to 2850m) in healthy individuals, who permanently live at high altitude over 2600m.

Tipo de estudo

Intervencional

Inscrição (Estimado)

14

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

  • Nome: Silvia Ulrich, Prof. Dr. med.
  • Número de telefone: +41442552220
  • E-mail: silvia.ulrich@usz.ch

Estude backup de contato

  • Nome: Michael Furian, Prof. Dr. sc. ETH
  • Número de telefone: +41442552220

Locais de estudo

      • Zurich, Suíça, 8091
        • University Hospital of Zurich

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

  • Adulto
  • Adulto mais velho

Aceita Voluntários Saudáveis

Sim

Descrição

Inclusion Criteria:

  • Adults aged 18-80 years and of all genders
  • Permanent residence > 2600 m
  • healthy: no self perceived cardiopulmonary disease limiting daily activities
  • written informed consent to participate in the study.

Exclusion Criteria:

  • Age <18 years or >80 years
  • Participants who cannot follow the study investigations
  • Participants permanently living < 2600m
  • Participants who traveled and stayed overnight at altitudes <2000 m in the past 4 weeks.
  • any self-perceived cardiopulmonary disease limiting daily activities

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: Cuidados de suporte
  • Alocação: N / D
  • Modelo Intervencional: Atribuição de grupo único
  • Mascaramento: Nenhum (rótulo aberto)

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Lung function at sea level and at 2850m
Assessment of lung function and pulmonary resistance/reactance on day four at sea level (after prior descent from 2850m) and after re-ascent (after totally one week at sea level) back to 2850m by bus (in one day)
Descent from 2850m to sea level with a stay for 7 days and re-ascent/return back to their usual living altitude at 2850m

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
FEV1 after re-ascent to 2850m
Prazo: From Day 4 at sea level to the day after re-ascent (Day 9)
Difference/change in forced expiratory volume in one second FEV1 between sea level (measurement on the 4th day) and day after re-ascent to 2850m in healthy individuals
From Day 4 at sea level to the day after re-ascent (Day 9)

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Forced Vital Capacity FVC after re-ascent to 2850m
Prazo: From Day 4 at sea level to the day after re-ascent (Day 9)
Difference/change in forced vital capacity FVC between sea level (measurement on the 4th day) and day after re-ascent to 2850m in healthy individuals
From Day 4 at sea level to the day after re-ascent (Day 9)
FEV1/FVC after re-ascent to 2850m
Prazo: From Day 4 at sea level to the day after re-ascent (Day 9)
Difference/change in FEV1/FVC between sea level (measurement on the 4th day) and day after re-ascent to 2850m in healthy individuals
From Day 4 at sea level to the day after re-ascent (Day 9)
Respiratory Impedance (forced oscillation technique) after re-ascent to 2850m
Prazo: From Day 4 at sea level to the day after re-ascent (Day 9)
Difference/change in respiratory impedance (forced oscillation technique) between sea level (measurement on the 4th day) and day after re-ascent to 2850m in healthy individuals
From Day 4 at sea level to the day after re-ascent (Day 9)
Respiratory resistance (forced oscillation technique) after re-ascent to 2850m
Prazo: From Day 4 at sea level to the day after re-ascent (Day 9)
Difference/change in respiratory resistance (forced oscillation technique) between sea level (measurement on the 4th day) and day after re-ascent to 2850m in healthy individuals
From Day 4 at sea level to the day after re-ascent (Day 9)
Respiratory reactance (forced oscillation technique) after re-ascent to 2850m
Prazo: From Day 4 at sea level to the day after re-ascent (Day 9)
Difference/change in respiratory reactance (forced oscillation technique) between sea level (measurement on the 4th day) and day after re-ascent to 2850m in healthy individuals
From Day 4 at sea level to the day after re-ascent (Day 9)
FEV1 after 4 days at sea level
Prazo: From high altitude (2850m) to day 4 at sea level
Difference/change in FEV1 between 2850m (prior to descent) and day 4 at sea level in healthy individuals
From high altitude (2850m) to day 4 at sea level
Forced Vital Capacity FVC after 4 days at sea level
Prazo: From high altitude (2850m) to day 4 at sea level
Difference/change in forced vital capacity FVC between 2850m (prior to descent) and day 4 at sea level in healthy individuals
From high altitude (2850m) to day 4 at sea level
FEV1/FVC after 4 days at sea level
Prazo: From high altitude (2850m) to day 4 at sea level
Difference/change in FEV1/FVC between 2850m (prior to descent) and day 4 at sea level in healthy individuals
From high altitude (2850m) to day 4 at sea level
Respiratory Impedance (forced oscillation technique) after 4 days at sea level
Prazo: From high altitude (2850m) to day 4 at sea level
Difference/change in respiratory Impedance (forced oscillation technique) between 2850m (prior to descent) and day 4 at sea level in healthy individuals
From high altitude (2850m) to day 4 at sea level
Respiratory resistance (forced oscillation technique) after 4 days at sea level
Prazo: From high altitude (2850m) to day 4 at sea level
Difference/change in respiratory resistance (forced oscillation technique) between 2850m (prior to descent) and day 4 at sea level in healthy individuals
From high altitude (2850m) to day 4 at sea level
Respiratory reactance (forced oscillation technique) after 4 days at sea level
Prazo: From high altitude (2850m) to day 4 at sea level
Difference/change in respiratory reactance (forced oscillation technique) between 2850m (prior to descent) and day 4 at sea level in healthy individuals
From high altitude (2850m) to day 4 at sea level
FEV1 pre-descent and after re-ascent (2850m)
Prazo: Baseline at 2850m followed by a one-week stay at sea level to the day after re-ascent back to 2850m (time frame approximately 11 days)
Difference/change in FEV1 at 2850m with a one-week stay at sea level in between (day pre-descent vs. day after re-ascent) in healthy individuals
Baseline at 2850m followed by a one-week stay at sea level to the day after re-ascent back to 2850m (time frame approximately 11 days)
Forced Vital Capacity FVC pre-descent and after re-ascent (2850m)
Prazo: Baseline at 2850m followed by a one-week stay at sea level to the day after re-ascent back to 2850m (time frame approximately 11 days)
Difference/change in forced vital capacity FVC at 2850m with a one-week stay at sea level in between (day pre-descent vs. day after re-ascent) in healthy individuals
Baseline at 2850m followed by a one-week stay at sea level to the day after re-ascent back to 2850m (time frame approximately 11 days)
FEV1/FVC pre-descent and after re-ascent (2850m)
Prazo: Baseline at 2850m followed by a one-week stay at sea level to the day after re-ascent back to 2850m (time frame approximately 11 days)
Difference/change in FEV1/FVC at 2850m with a one-week stay at sea level in between (day pre-descent vs. day after re-ascent) in healthy individuals
Baseline at 2850m followed by a one-week stay at sea level to the day after re-ascent back to 2850m (time frame approximately 11 days)
Respiratory Impedance (forced oscillation technique) pre-descent and after re-ascent (2850m)
Prazo: Baseline at 2850m followed by a one-week stay at sea level to the day after re-ascent back to 2850m (time frame approximately 11 days)
Difference/change in respiratory impedance (forced oscillation technique) at 2850m with a one-week stay at sea level in between (day pre-descent vs. day after re-ascent) in healthy individuals
Baseline at 2850m followed by a one-week stay at sea level to the day after re-ascent back to 2850m (time frame approximately 11 days)
Respiratory resistance (forced oscillation technique) pre-descent and after re-ascent (2850m)
Prazo: Baseline at 2850m followed by a one-week stay at sea level to the day after re-ascent back to 2850m (time frame approximately 11 days)
Difference/change in respiratory resistance (forced oscillation technique) at 2850m with a one-week stay at sea level in between (day pre-descent vs. day after re-ascent) in healthy individuals
Baseline at 2850m followed by a one-week stay at sea level to the day after re-ascent back to 2850m (time frame approximately 11 days)
Respiratory reactance (forced oscillation technique) pre-descent and after re-ascent (2850m)
Prazo: Baseline at 2850m followed by a one-week stay at sea level to the day after re-ascent back to 2850m (time frame approximately 11 days)
Difference/change in respiratory reactance (forced oscillation technique) at 2850m with a one-week stay at sea level in between (day pre-descent vs. day after re-ascent) in healthy individuals
Baseline at 2850m followed by a one-week stay at sea level to the day after re-ascent back to 2850m (time frame approximately 11 days)

Colaboradores e Investigadores

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

Patrocinador

Investigadores

  • Investigador principal: Silvia Ulrich, University Hospital Zurich, Departement of Pulmonology
  • Investigador principal: Rodrigo Hoyos, Hospital Carlos Andrade Marin of Quito, Ecuador

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Estimado)

25 de setembro de 2026

Conclusão Primária (Estimado)

4 de outubro de 2026

Conclusão do estudo (Estimado)

31 de dezembro de 2026

Datas de inscrição no estudo

Enviado pela primeira vez

17 de agosto de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

31 de agosto de 2026

Primeira postagem (Real)

4 de setembro de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

4 de setembro de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

31 de agosto de 2026

Última verificação

1 de agosto de 2026

Mais Informações

Termos relacionados a este estudo

Outros números de identificação do estudo

  • Ec_LAvsHA_Lufu_H

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

SIM

Descrição do plano IPD

Data will be provided upon request and based on a clear intention reviewed by an ethical review board.

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 .