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Trinvis og dekrementel peep -titrering af forskellige strategier hos emner med ARDS: En potentiel fysiologisk undersøgelse (ARDS，PEEP)

21. august 2026 opdateret af: Zhou Yongfang, West China Hospital

Forskning i præcision individualiserede mekaniske ventilationsstrategier for ARDS styret af elektrisk impedans tomografiovervågning og evaluering af forskellene i ventilations- og perfusionsfordeling

Efterforskerne gennemførte en potentiel fysiologisk observationsundersøgelse af ARDS -befolkningen, beskrev deres fysiologiske og EIT -indekser med forskellige PEEP -titreringsmetoder, og sammenlignet og analyserede og analyserede også disse indekser for at afgøre, om der var forskelle mellem forskellige PEEP -titreringsmetoder. Målet med denne undersøgelse var til Udforsk og afdæk de fysiologiske forskelle som respons på optimal peep på forskellige måder ， og analyseret sammenhængen mellem det optimale peep på disse forskellige måder.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Observationel

Tilmelding (Faktiske)

31

Kontakter og lokationer

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

Studiesteder

  • Kina
    • Sichuan
      • Chengdu, Sichuan, Kina, 610041
        • West China Hospital of Sichuan University, Chengdu

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

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Ntubated og mekaniske ventilerede patienter over 18 år med moderat-svær ARDS (PAO2 /FIO2, 200 mm Hg), der blev indlagt på ICU inden for 48 timer, blev tilmeldt fra oktober 2022 til juli 2024.

Beskrivelse

Inkluderingskriterier:

  • Intuberede og mekaniske ventilerede patienter i ICU inden for 48 timer
  • Være over 18 år
  • Med moderat-svær ARDS (PAO2 /FIO2, 200 mm Hg)

Ekskluderingskriterier:

  • Alvorlige kroniske obstruktive lungesygdomme
  • Pulmonal bulla (> 1 cm) eller pneumothorax eller pneumomediastinum eller subkutan emfysem
  • Graviditet
  • Bmi≥35 kg/m2
  • Mistænkt lungevaskulær blødning
  • Forstyrrelse af bevidsthed eller intrakraniel hypertension
  • Alvorlig hjertedysfunktion (New York Heart Association Class III eller IV, akutkoronært syndrom eller vedvarende ventrikulær takyarytmi), kardiogent chok eller efter større hjerteoperation
  • Hæmodynamisk ustabilitet (dvs. gennemsnitligt arterielt tryk [kort] <60 mm Hg på trods af vasopressorbrug
  • Det medicinske team, der betragter korte perioder med højt pres for at være utrygt
  • Kontraindikationer til placering af esophageal trykkateter (f.eks. Esophageal Varix eller brud på kranietbase)
  • Kontraindikationer til EIT -overvågning (inklusive pacemaker eller kutane sygdomme, der begrænser elektrodeplacering)
  • Agonal scene eller slutfaser af sygdomme

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
the selected PEEP values
Tidsramme: through study completion, an average of 1 year

1. Method-specific selected PEEP values

  • Description: The principal endpoint was the set of 15 method-specific selected PEEP values determined for each patient.
  • Unit of Measure: cmH₂O
through study completion, an average of 1 year

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
SpO2/FiO2 at each selected PEEP
Tidsramme: baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
SpO2/FiO2 measured at each selected PEEP. This study will separately measure peripheral oxygen saturation (SpO₂, unit: %) and fraction of inspired oxygen (FiO₂, unit: %). Because both measurements share the same unit (%), they will not be reported as separate outcome measures. Instead, they will be aggregated into a single reported value: the SpO₂/FiO₂ ratio (dimensionless). At each selected positive end-expiratory pressure (PEEP) level, the ratio will be calculated as S/F = SpO₂ (%) ÷ FiO₂ (%), and this ratio will be recorded as the final outcome measure.
baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
respiratory system compliance value at each selected PEEP
Tidsramme: baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
This study will directly record the respiratory system compliance value as measured and displayed by the ventilator (unit: mL/cmH₂O) at each selected PEEP.
baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
plateau pressure at each selected PEEP
Tidsramme: baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
At each selected positive end-expiratory pressure (PEEP) level, plateau pressure will be directly recorded from the ventilator after performing an inspiratory hold maneuver. This value is displayed by the ventilator in cmH₂O
baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
Driving Pressure at each selected PEEP
Tidsramme: baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
At each selected positive end-expiratory pressure (PEEP) level, plateau pressure (Pplat, unit: cmH₂O) will be measured via the ventilator, and the corresponding PEEP value (unit: cmH₂O) will be recorded. Driving pressure (ΔP) is calculated as the difference between the two: ΔP = Pplat - PEEP (unit: cmH₂O).
baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
End-inspiratory Transpulmonary Pressure (PTPi) at each selected PEEP
Tidsramme: baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
After placement of an esophageal pressure catheter, the ventilator will monitor esophageal pressure (Pes) and airway pressure. At each selected positive end-expiratory pressure (PEEP) level, an end-inspiratory hold maneuver will be performed. The end-inspiratory transpulmonary pressure (PTPi) is calculated as the difference between the airway plateau pressure (Pplat) measured during the hold and the corresponding esophageal pressure (Pes): PTPi = Pplat - Pes (unit: cmH₂O).
baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
End-expiratory Transpulmonary Pressure (PTPe) at each selected PEEP
Tidsramme: baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
After placement of an esophageal pressure catheter, the ventilator will monitor esophageal pressure (Pes) and airway pressure. At each selected positive end-expiratory pressure (PEEP) level, an end-expiratory hold maneuver will be performed. The end-inspiratory transpulmonary pressure (PTPe) is calculated as the difference between the PEEP measured during the hold and the corresponding esophageal pressure (Pes): PTPe = PEEP - Pes (unit: cmH₂O). This calculated value is the single reported outcome measure
baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
transpulmonary driving pressure at each selected PEEP
Tidsramme: baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
After placement of an esophageal pressure catheter, the ventilator will monitor transpulmonary pressures. At each selected PEEP level, end-inspiratory transpulmonary pressure (PTPi) and end-expiratory transpulmonary pressure (PTPe) are obtained during inspiratory and expiratory hold maneuvers, respectively. Both are measured in cmH₂O. Transpulmonary driving pressure is calculated as the difference: ΔPtp = PTPi - PTPe (unit: cmH₂O).
baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
EIT-derived Regional Ventilation Parameters at each selected PEEP level
Tidsramme: baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
Using electrical impedance tomography (EIT), the lung is divided into four regions of interest (ROI I to ROI IV) from ventral to dorsal. For each ROI, the percentage of tidal impedance variation relative to total tidal impedance variation is recorded (% of total). unit: cmH₂O
baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
the center of ventilation (COV) at each selected PEEP level
Tidsramme: baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
the center of ventilation (COV) is calculated as the position of the ventilation center along the ventral-dorsal axis, expressed as a percentage (0% = ventral, 100% = dorsal). this parameter is measured in %
baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
CL HP% (overdistension region) at each selected PEEP level
Tidsramme: baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
Using electrical impedance tomography (EIT)，based on regional compliance analysis，CL HP% represent the percentage of lung regions showing a decrease in compliance at high PEEP due to overdistension (unit: %).
baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
CL LP% (collapse region) at selected PEEP
Tidsramme: baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process
Using electrical impedance tomography (EIT)，based on regional compliance analysis，CL LP% represent the percentage of lung regions showing a decrease in compliance at low PEEP due to collapse (unit: %).
baseline, within 5 minutes after the PV-tool measurement, and within 5 minutes after each increment and decrement of PEEP during the PEEP adjustment process

Samarbejdspartnere og efterforskere

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

Sponsor

West China Hospital

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 (Faktiske)

10. december 2024

Primær færdiggørelse (Faktiske)

28. juli 2025

Studieafslutning (Faktiske)

28. juli 2025

Datoer for studieregistrering

Først indsendt

5. december 2024

Først indsendt, der opfyldte QC-kriterier

29. januar 2025

Først opslået (Faktiske)

5. februar 2025

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

26. august 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

21. august 2026

Sidst verificeret

1. august 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • PEEP Titration
  • 2024YFFK0329 (Andet bevillings-/finansieringsnummer: Sichuan Science and Technology Program)
  • 2024ZD0530000 (Andet bevillings-/finansieringsnummer: Noncommunicable Chronic Diseases-National Science and Technology Major Project)

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