Early EIT-Guided PEEP Titration on Pulmonary Physiology in Patients With Moderate-to-Severe ARDS Undergoing Prone Positioning (EIT-PEEP-PRONE) (EIT-PEEP-PRONE)
A Randomized Controlled Trial of Early EIT-Guided PEEP Titration on Pulmonary Physiology in Moderate-to-Severe ARDS Patients Undergoing Prone Positioning
Background: Electrical impedance tomography (EIT)-guided PEEP titration has been shown to improve regional ventilation distribution, increase respiratory system compliance, and reduce mechanical power in patients with acute respiratory distress syndrome (ARDS), but its effect on mortality remains unproven. In patients with moderate-to-severe ARDS, prone positioning for 4 hours allows pulmonary ventilation and perfusion to reach a new steady state, with optimization of ventilation-perfusion (V/Q) matching and other pulmonary physiological parameters. However, whether dynamic PEEP titration guided by EIT at this time point can further optimize V/Q matching and other pulmonary physiological parameters compared with conventional methods has not been reported.
Objective: To investigate whether EIT-guided PEEP titration performed at 4 hours after prone positioning initiation can further optimize V/Q matching and other pulmonary physiological parameters in patients with moderate-to-severe ARDS undergoing prone positioning.
Methods: This is a prospective, single-center, randomized, open-label, parallel-controlled physiological study. A total of 40 patients with moderate-to-severe ARDS (Berlin definition, PaO₂/FiO₂ < 150 mmHg) will be enrolled and randomized in a 1:1 ratio to either the EIT-guided group or the control group. PEEP intervention will be performed at 4 hours after prone positioning initiation (T1) in both groups: the EIT group receives EIT-guided PEEP titration, while the control group receives PEEP set according to the ARDSNet/PEEP-FiO₂ table. The primary outcome is V/Q matching percentage assessed by EIT at 18 hours of prone positioning (T2) and 6 hours after supine repositioning (T3). Secondary outcomes include respiratory mechanics, EIT-derived parameters (regional ventilation distribution, global inhomogeneity index, center of ventilation), oxygenation indices, echocardiographic measures of cardiac function, and clinical outcomes (28-day mortality, ventilator-free days, ICU length of stay, etc.).
Conclusion: This study will provide physiological evidence for early EIT-guided PEEP titration in patients with moderate-to-severe ARDS undergoing prone positioning, and will lay the foundation for future large-scale clinical trials.
Tutkimuksen yleiskatsaus
Tila
Tila
Ehdot
Ehdot
Interventio / Hoito
Interventio / Hoito
Opintotyyppi
Opintotyyppi
Ilmoittautuminen (Arvioitu)
Ilmoittautuminen
Vaihe
Vaihe
- Ei sovellettavissa
Yhteystiedot ja paikat
Opiskeluyhteys
Opiskeluyhteys
- Nimi: Min Xie, MD, PhD
- Puhelinnumero: +86-27-83665204
- Sähköposti: Xie_m@126.com
Tutki yhteystietojen varmuuskopiointi
- Nimi: Jianmin Ling, MD
- Sähköposti: 2018tj5179@hust.edu.cn
Opiskelupaikat
-
-
Hubei
-
Wuhan, Hubei, Kiina, 430030
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
-
Ottaa yhteyttä:
- Min Xie, MD, PhD
- Puhelinnumero: +86-27-83665204
- Sähköposti: 2018tj5179@hust.edu.cn
-
-
Osallistumiskriteerit
Kelpoisuusvaatimukset
Kelpoisuusvaatimukset
Opintokelpoiset iät
- Aikuinen
- Vanhempi Aikuinen
Hyväksyy terveitä vapaaehtoisia
Kuvaus
Inclusion Criteria:
- Diagnosis of moderate-to-severe ARDS according to the Berlin definition, with a PaO₂/FiO₂ ratio < 150 mmHg on optimal mechanical ventilation.
- Clinical decision has been made to place a central venous catheter (internal jugular or subclavian vein) for clinical management.
Exclusion Criteria:
- Pregnancy or postpartum state.
- BMI > 35 kg/m².
- Duration of invasive mechanical ventilation > 48 hours at enrollment.
- Severe hemodynamic instability (mean arterial pressure < 65 mmHg on norepinephrine ≥ 0.5 μg/kg/min).
- Immediate need for veno-venous extracorporeal membrane oxygenation (VV-ECMO) at enrollment.
- Contraindications to prone positioning or EIT monitoring, including but not limited to: facial or cervical trauma; unstable spinal, femoral, pelvic, or rib fractures; recent cardiac surgery; pneumothorax; elevated intracranial pressure; pacemaker or implantable cardioverter-defibrillator; severe chronic lung disease (e.g., severe COPD, asthma, interstitial lung disease); severe cardiac dysfunction (New York Heart Association Class III or IV, acute coronary syndrome, sustained ventricular tachyarrhythmia, or cardiogenic shock).
- Lack of informed consent from legally authorized representative.
Opintosuunnitelma
Miten tutkimus on suunniteltu?
Suunnittelun yksityiskohdat
- Ensisijainen käyttötarkoitus: Tukevaa hoitoa
- Jako: Satunnaistettu
- Inventiomalli: Rinnakkaistehtävä
- Naamiointi: Ei mitään (avoin tarra)
Aseiden lukumäärä
Aseet ja interventiot
Osallistujaryhmä / ArmOsallistujaryhmä / Arm |
Interventio / HoitoInterventio / Hoito |
|---|---|
|
Kokeellinen: EIT-Guided PEEP Titration Group
PEEP will be titrated using EIT monitoring at 4 hours after prone positioning initiation (T1).
The optimal PEEP will be determined at the intersection of the cumulative collapse and overdistension curves, or at the lowest global inhomogeneity index if the intersection occurs between two PEEP levels.
|
PEEP titration is performed during mechanical ventilation to optimize respiratory mechanics and ventilation-perfusion matching in patients with ARDS.
|
|
Active Comparator: ARDSNet/PEEP-FiO₂ Table Group
PEEP will be set according to the ARDSNet/PEEP-FiO₂ table at 4 hours after prone positioning initiation (T1).
|
PEEP will be set according to the ARDSNet/PEEP-FiO₂ table at 4 hours after prone positioning initiation (T1).
|
Mitä tutkimuksessa mitataan?
Ensisijaiset tulostoimenpiteet
Ensisijaiset tulostoimenpiteet
Tulosmittaus |
Toimenpiteen kuvaus |
Aikaikkuna |
|---|---|---|
|
Ventilation-Perfusion (V/Q) Matching Percentage
Aikaikkuna: At 18 hours of prone positioning (T2) and at 6 hours after supine repositioning (T3)
|
V/Q matching percentage assessed by electrical impedance tomography (EIT) using the EIT Evaluation Tool (SDMI) V2.7.1.
V/Q matching reflects the efficiency of pulmonary gas exchange and is calculated from regional ventilation and perfusion distribution maps.
|
At 18 hours of prone positioning (T2) and at 6 hours after supine repositioning (T3)
|
Toissijaiset tulostoimenpiteet
Toissijaiset tulostoimenpiteet
Tulosmittaus |
Toimenpiteen kuvaus |
Aikaikkuna |
|---|---|---|
|
Respiratory System Compliance
Aikaikkuna: Baseline, T2 (18h prone), and T3 (6h post-supine)
|
Respiratory system compliance (Crs) calculated as tidal volume divided by driving pressure (plateau pressure minus PEEP), measured under volume-controlled ventilation.
|
Baseline, T2 (18h prone), and T3 (6h post-supine)
|
|
Driving Pressure
Aikaikkuna: At baseline (T0), at 18 hours of prone positioning (T2), and at 6 hours after supine repositioning (T3)
|
Driving pressure (DP) calculated as plateau pressure (Pplat) minus PEEP, measured under volume-controlled ventilation.
|
At baseline (T0), at 18 hours of prone positioning (T2), and at 6 hours after supine repositioning (T3)
|
|
EIT-Derived Regional Ventilation Distribution
Aikaikkuna: At baseline (T0), at 18 hours of prone positioning (T2), and at 6 hours after supine repositioning (T3)
|
Regional ventilation distribution assessed by EIT, expressed as percentage of tidal impedance variation in four regions of interest (ROIs): ventral (ROI 1), mid-ventral (ROI 2), mid-dorsal (ROI 3), and dorsal (ROI 4), each corresponding to 25% of the anteroposterior diameter, Center of Ventilation (CoV), Global Inhomogeneity Index (GI), Shunt, Dead Space.
|
At baseline (T0), at 18 hours of prone positioning (T2), and at 6 hours after supine repositioning (T3)
|
|
RVEDA/LVEDA
Aikaikkuna: At baseline (T0) and at 6 hours after supine repositioning (T3)
|
Right Ventricular End-Diastolic Area to Left Ventricular End-Diastolic Area Ratio
|
At baseline (T0) and at 6 hours after supine repositioning (T3)
|
|
RVFAC
Aikaikkuna: Baseline and 6h post-supine repositioning (T3)
|
Right Ventricular Fractional Area Change(%)
|
Baseline and 6h post-supine repositioning (T3)
|
|
TAPSE
Aikaikkuna: Baseline and 6h post-supine repositioning (T3)
|
Tricuspid Annular Plane Systolic Excursion (mm)
|
Baseline and 6h post-supine repositioning (T3)
|
|
TRVmax
Aikaikkuna: Baseline and 6h post-supine repositioning (T3)
|
Maximal Tricuspid Regurgitation Velocity (m/s)
|
Baseline and 6h post-supine repositioning (T3)
|
|
LVEF
Aikaikkuna: At baseline (T0) and at 6 hours after supine repositioning (T3)
|
Left Ventricular Ejection Fraction(%)
|
At baseline (T0) and at 6 hours after supine repositioning (T3)
|
|
SV
Aikaikkuna: Baseline and 6h post-supine repositioning (T3)
|
Stroke Volume(ml)
|
Baseline and 6h post-supine repositioning (T3)
|
|
CO
Aikaikkuna: Baseline and 6h post-supine repositioning (T3)
|
Cardiac Output (L/min)
|
Baseline and 6h post-supine repositioning (T3)
|
|
28-Day Mortality
Aikaikkuna: At 28 days after enrollment
|
All-cause mortality within 28 days after enrollment.
|
At 28 days after enrollment
|
|
Ventilator-Free Days at 28 Days
Aikaikkuna: At 28 days after enrollment
|
Number of days alive and free from invasive mechanical ventilation during the first 28 days after enrollment.
|
At 28 days after enrollment
|
|
ICU Length of Stay
Aikaikkuna: From enrollment through ICU discharge, assessed up to 28 days
|
Total duration of ICU stay (in days) from enrollment to ICU discharge or death.
|
From enrollment through ICU discharge, assessed up to 28 days
|
|
Incidence of ECMO Use
Aikaikkuna: During the ICU stay, assessed up to 28 days
|
Proportion of patients requiring veno-venous extracorporeal membrane oxygenation (VV-ECMO) during the ICU stay.
|
During the ICU stay, assessed up to 28 days
|
|
Incidence of Tracheostomy
Aikaikkuna: During the ICU stay, assessed up to 28 days.
|
Proportion of patients undergoing tracheostomy during the ICU stay.
|
During the ICU stay, assessed up to 28 days.
|
Yhteistyökumppanit ja tutkijat
Sponsori
Sponsori
Tutkijat
Tutkijat
- Päätutkija: Min Xie, Tongji Hospital
Julkaisuja ja hyödyllisiä linkkejä
Yleiset julkaisut
- Guerin C, Reignier J, Richard JC, Beuret P, Gacouin A, Boulain T, Mercier E, Badet M, Mercat A, Baudin O, Clavel M, Chatellier D, Jaber S, Rosselli S, Mancebo J, Sirodot M, Hilbert G, Bengler C, Richecoeur J, Gainnier M, Bayle F, Bourdin G, Leray V, Girard R, Baboi L, Ayzac L; PROSEVA Study Group. Prone positioning in severe acute respiratory distress syndrome. N Engl J Med. 2013 Jun 6;368(23):2159-68. doi: 10.1056/NEJMoa1214103. Epub 2013 May 20.
- Bellani G, Laffey JG, Pham T, Fan E, Brochard L, Esteban A, Gattinoni L, van Haren F, Larsson A, McAuley DF, Ranieri M, Rubenfeld G, Thompson BT, Wrigge H, Slutsky AS, Pesenti A; LUNG SAFE Investigators; ESICM Trials Group. Epidemiology, Patterns of Care, and Mortality for Patients With Acute Respiratory Distress Syndrome in Intensive Care Units in 50 Countries. JAMA. 2016 Feb 23;315(8):788-800. doi: 10.1001/jama.2016.0291.
- Sang L, Lin Z, Zhao Z. How often do we need to update PEEP setting during prone positioning in ARDS? Crit Care. 2024 Feb 26;28(1):60. doi: 10.1186/s13054-024-04847-w. No abstract available.
- Servetti A, Battaglini D, Patroniti NA, Al Sharie S, Jouryyeh B, Al-Husinat L, Marini JJ, Rocco PRM. Optimising positive end-expiratory pressure in acute respiratory distress syndrome: a narrative review of approaches to titration. Br J Anaesth. 2026 May;136(5):1472-1481. doi: 10.1016/j.bja.2025.12.048. Epub 2026 Jan 27.
- Cornejo R, Papazian L, Martin Delgado MC. Physiological effects of prone positioning during invasive mechanical ventilation: beyond PaO2. Intensive Care Med. 2026 Mar;52(3):574-577. doi: 10.1007/s00134-026-08305-9. Epub 2026 Feb 9. No abstract available.
- Al-Husinat L, Azzam S, Al Sharie S, Araydah M, Battaglini D, Abushehab S, Cortes-Puentes GA, Schultz MJ, Rocco PRM. A narrative review on the future of ARDS: evolving definitions, pathophysiology, and tailored management. Crit Care. 2025 Feb 24;29(1):88. doi: 10.1186/s13054-025-05291-0.
- Wang R, Wang W, Tang X, Qi Z, Li T, Liu Y, Li H, Yan J, Yang H, Lyu W, Li Z, Sun B, Gan G. Association between ventilation-perfusion matching improvement during initial prone positioning and ICU mortality in patients with moderate to severe ARDS: a prospective two-center study. Ann Intensive Care. 2025 May 21;15(1):69. doi: 10.1186/s13613-025-01489-1.
- Songsangvorn N, Xu Y, Lu C, Rotstein O, Brochard L, Slutsky AS, Burns KEA, Zhang H. Electrical impedance tomography-guided positive end-expiratory pressure titration in ARDS: a systematic review and meta-analysis. Intensive Care Med. 2024 May;50(5):617-631. doi: 10.1007/s00134-024-07362-2. Epub 2024 Mar 21.
- He H, Zhao Z, Becher T, Bellani G, Yoshida T, Amato MBP, Long Y, Frerichs I; REspiratory and Critical Care medicine EIT study (RECCE) group. Recommendations for lung ventilation and perfusion assessment with chest electrical impedance tomography in critically ill adult patients: an international evidence-based and expert Delphi consensus study. EClinicalMedicine. 2025 Oct 17;89:103575. doi: 10.1016/j.eclinm.2025.103575. eCollection 2025 Nov.
Opintojen ennätyspäivät
Opi tärkeimmät päivämäärät
Opiskelun aloitus (Arvioitu)
Opiskelun aloitus
Ensisijainen valmistuminen (Arvioitu)
Ensisijainen valmistuminen
Opintojen valmistuminen (Arvioitu)
Opintojen valmistuminen
Opintoihin ilmoittautumispäivät
Ensimmäinen lähetetty
Ensimmäinen lähetetty
Ensimmäinen toimitettu, joka täytti QC-kriteerit
Ensimmäinen toimitettu, joka täytti QC-kriteerit
Ensimmäinen Lähetetty (Todellinen)
Ensimmäinen Lähetetty
Tutkimustietojen päivitykset
Viimeisin päivitys julkaistu (Todellinen)
Viimeisin päivitys julkaistu
Viimeisin lähetetty päivitys, joka täytti QC-kriteerit
Viimeisin lähetetty päivitys, joka täytti QC-kriteerit
Viimeksi vahvistettu
Viimeksi vahvistettu
Lisää tietoa
Tähän tutkimukseen liittyvät termit
Muita asiaankuuluvia MeSH-ehtoja
Muut tutkimustunnusnumerot
Muut tutkimustunnusnumerot
- TJ-IRB202605019
Yksittäisten osallistujien tietojen suunnitelma (IPD)
Aiotko jakaa yksittäisten osallistujien tietoja (IPD)?
Lääke- ja laitetiedot, tutkimusasiakirjat
Tutkii yhdysvaltalaista FDA sääntelemää lääkevalmistetta
Tutkii yhdysvaltalaista FDA sääntelemää laitetuotetta
Nämä tiedot haettiin suoraan verkkosivustolta clinicaltrials.gov ilman muutoksia. Jos sinulla on pyyntöjä muuttaa, poistaa tai päivittää tutkimustietojasi, ota yhteyttä register@clinicaltrials.gov. Heti kun muutos on otettu käyttöön osoitteessa clinicaltrials.gov, se päivitetään automaattisesti myös verkkosivustollemme .