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Assessment of Lung Function (Lufu) at Sea Level LA vs. High Altitude HA in Patients With Pulmonary Arterial Hypertension PAH

31. august 2026 opdateret af: 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 patients with pulmonary arterial disease PAH, who live permanently > 2600m.

Studieoversigt

Status

Ikke rekrutterer endnu

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

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 patients with diagnosed pulmonary hypertension according to guidelines, who permanently live at high altitude over 2600m.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

20

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Undersøgelse Kontakt Backup

  • Navn: Michael Furian, Prof. Dr. sc. ETH
  • Telefonnummer: +41442552220

Studiesteder

  • Schweiz
      • Zurich, Schweiz, 8091
        • University Hospital of Zurich

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

  • Adult patients aged 18-80 years and of all genders
  • Permanent residence > 2600 m
  • Diagnosis of pulmonary arterial hypertension PAH (PAHHA-Group) according to guidelines
  • Patients are stable on therapy
  • NYHA (new york heart association) functional class I-III.
  • written informed consent to participate in the study.

Exclusion Criteria:

  • Age <18 years or >80 years
  • unstable condition
  • Patients who cannot follow the study investigations
  • Patient permanently living < 2600m.
  • Patients who traveled and stayed overnight at altitudes <2000 m in the past 4 weeks.
  • Patients with moderate to severe concomitant lung disease (FEV1<70% or forced vital capacity <70%), severe parenchymal lung disease, severe smokers (>20 cigarettes/day)
  • Severely hypoxemic patients at Quito permanently having persistent SpO2 (oxygen saturation by pulseoximetry) <80% on ambient air.
  • Patient with a non-corrected ventricular septum defect
  • Relevant concomitant other disease of the heart, kidney, liver, blood (anemia hemoglobin<11 g/dl)

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Støttende pleje
  • Tildeling: N/A
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: 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)
Adfærdsmæssigt: Re-ascent from sea level to 2850m
Descent from 2850m to sea level with a stay for 7 days and re-ascent/return back to their usual living altitude at 2850m

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
FEV1 after re-ascent to 2850m
Tidsramme: From Day 4 at sea level to the day after re-ascent (Day 9: approximately 6 days)
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 patients with pulmonary arterial hypertension
From Day 4 at sea level to the day after re-ascent (Day 9: approximately 6 days)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Forced Vital Capacity FVC after re-ascent to 2850m
Tidsramme: From Day 4 at sea level to the day after re-ascent (Day 9: approximately 6 days)
Difference/change in forced vital capacity FVC between sea level (measurement on the 4th day) and day after re-ascent to 2850m in patients with pulmonary arterial hypertension
From Day 4 at sea level to the day after re-ascent (Day 9: approximately 6 days)
FEV1/FVC after re-ascent to 2850m
Tidsramme: From Day 4 at sea level to the day after re-ascent (Day 9: approximately 6 days)
Difference/change in FEV1/FVC between sea level (measurement on the 4th day) and day after re-ascent to 2850m in patients with pulmonary arterial hypertension
From Day 4 at sea level to the day after re-ascent (Day 9: approximately 6 days)
Respiratory Impedance (forced oscillation technique) after re-ascent to 2850m
Tidsramme: From Day 4 at sea level to the day after re-ascent (Day 9: approximately 6 days)
Difference/change in respiratory impedance (forced oscillation technique) between sea level (measurement on the 4th day) and day after re-ascent to 2850m in patients with pulmonary arterial hypertension
From Day 4 at sea level to the day after re-ascent (Day 9: approximately 6 days)
Respiratory resistance (forced oscillation technique) after re-ascent to 2850m
Tidsramme: From Day 4 at sea level to the day after re-ascent (Day 9: approximately 6 days)
Difference/change in respiratory resistance (forced oscillation technique) between sea level (measurement on the 4th day) and day after re-ascent to 2850m in patients with pulmonary arterial hypertension
From Day 4 at sea level to the day after re-ascent (Day 9: approximately 6 days)
Respiratory reactance (forced oscillation technique) after re-ascent to 2850m
Tidsramme: From Day 4 at sea level to the day after re-ascent (Day 9: approximately 6 days)
Difference/change in respiratory reactance (forced oscillation technique) between sea level (measurement on the 4th day) and day after re-ascent to 2850m in patients with pulmonary arterial hypertension
From Day 4 at sea level to the day after re-ascent (Day 9: approximately 6 days)
FEV1 after 4 days at sea level
Tidsramme: From high altitude (Day 0, 2850m) to day 4 at sea level (approximately 5 days)
Difference/change in FEV1 between 2850m (prior to descent) and day 4 at sea level in patients with pulmonary arterial disease
From high altitude (Day 0, 2850m) to day 4 at sea level (approximately 5 days)
Forced Vital Capacity FVC after 4 days at sea level
Tidsramme: From high altitude (Day 0, 2850m) to day 4 at sea level (approximately 5 days)
Difference/change in forced vital capacity FVC between 2850m (prior to descent) and day 4 at sea level in patients with pulmonary arterial disease
From high altitude (Day 0, 2850m) to day 4 at sea level (approximately 5 days)
FEV1/FVC after 4 days at sea level
Tidsramme: From high altitude (Day 0, 2850m) to day 4 at sea level (approximately 5 days)
Difference/change in FEV1/FVC between 2850m (prior to descent) and day 4 at sea level in patients with pulmonary arterial disease
From high altitude (Day 0, 2850m) to day 4 at sea level (approximately 5 days)
Respiratory Impedance (forced oscillation technique) after 4 days at sea level
Tidsramme: From high altitude (Day 0, 2850m) to day 4 at sea level (approximately 5 days)
Difference/change in respiratory impedance (forced oscillation technique) between 2850m (prior to descent) and day 4 at sea level in patients with pulmonary arterial disease
From high altitude (Day 0, 2850m) to day 4 at sea level (approximately 5 days)
Respiratory resistance (forced oscillation technique) after 4 days at sea level
Tidsramme: From high altitude (Day 0, 2850m) to day 4 at sea level (approximately 5 days)
Difference/change in respiratory resistance (forced oscillation technique) between 2850m (prior to descent) and day 4 at sea level in patients with pulmonary arterial disease
From high altitude (Day 0, 2850m) to day 4 at sea level (approximately 5 days)
Respiratory reactance (forced oscillation technique) after 4 days at sea level
Tidsramme: From high altitude (Day 0, 2850m) to day 4 at sea level (approximately 5 days)
Difference/change in respiratory reactance (forced oscillation technique) between 2850m (prior to descent) and day 4 at sea level in patients with pulmonary arterial disease
From high altitude (Day 0, 2850m) to day 4 at sea level (approximately 5 days)
FEV1 pre-descent and after re-ascent (2850m)
Tidsramme: 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 patients with pulmonary arterial disease
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)
Tidsramme: 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 patients with pulmonary arterial hypertension
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)
Tidsramme: 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 patients with pulmonary arterial hypertension
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)
Tidsramme: 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 patients with pulmonary arterial hypertension
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)
Tidsramme: 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 patients with pulmonary arterial hypertension
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)
Tidsramme: 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 patients with pulmonary arterial hypertension
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)

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Silvia Ulrich Somaini

Efterforskere

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

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

25. september 2026

Primær færdiggørelse (Anslået)

4. oktober 2026

Studieafslutning (Anslået)

31. december 2026

Datoer for studieregistrering

Først indsendt

17. august 2026

Først indsendt, der opfyldte QC-kriterier

31. august 2026

Først opslået (Faktiske)

4. september 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

4. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

31. august 2026

Sidst verificeret

1. august 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • Ec_LAvsHA_Lufu_PAH

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

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

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