Improvement of ARDS Ventilation-perfusion Matching by Prone Positioning Assessed by EIT

NCT05765760 | Completed DMC

• 1 other identifier: 2022-KE-615
• Study Type: observational
• Target: 77
• Locations: 1 country
• Sites: 1

Brief Summary

Acute Respiratory Distress Syndrome (ARDS) is a highly lethal disease with limited treatment options. In recent years, prone position ventilation has been shown to improve the mortality rate and lung injury of ARDS patients by promoting lung recruitment, improving ventilation/perfusion (V/Q) ratio, enhancing respiratory system compliance, promoting sputum drainage, and effectively avoiding overinflation of the dorsal lung. Electrical Impedance Tomography (EIT) technology has been used to evaluate the effect of prone position ventilation on lung V/Q matching, and some studies have confirmed that prone position ventilation can improve lung V/Q matching and oxygenation index. However, previous studies were mostly case reports or small-sample physiological studies that lacked dynamic changes in lung V/Q matching during repeated prone position ventilation. Therefore, this study hypothesizes that prone position ventilation can increase lung V/Q matching in ARDS patients, and its improvement is correlated with changes in oxygenation index, invasive ventilation time, and patient prognosis. Repeated prone position ventilation can maintain lung V/Q matching at a higher level, no longer affected by changes in body position, which can accelerate pulmonary function recovery and improve the prognosis of ARDS patients.

Conditions

Acute Respiratory Distress Syndrome; Prone Position; Electrical Impedance Tomography

Outcome Measures

Primary Outcomes (1)

• ICU mortality

  The death of patients that occurs during their stay in the ICU

  28 days after enrollment

Secondary Outcomes (1)

• Ventilator-free days

  28 days after enrollment

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

ARDS Patients with PaO2/FiO2 \< 150mmH

You may qualify if:

• Age ≥ 18 years old;
• meet the diagnostic criteria of Berlin's definition for ARDS;
• invasive ventilation time \< 48h;
• PaO2/FiO2 \< 150mmHg.

You may not qualify if:

• Contraindication to the prone position;
• Contraindication to the EIT;
• Hemodynamically unstable;
• Patients with hypernatremia;
• Patients have received extracorporeal membrane oxygenation treatment.

Sponsors & Collaborators

• Beijing Chao Yang Hospital: lead

Study Sites (1)

Beijing Chao-Yang Hospital

Beijing, Beijing Municipality, 100020, China

Location

Related Publications (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.

  PMID: 26903337 BACKGROUND

• Attaway AH, Scheraga RG, Bhimraj A, Biehl M, Hatipoglu U. Severe covid-19 pneumonia: pathogenesis and clinical management. BMJ. 2021 Mar 10;372:n436. doi: 10.1136/bmj.n436.

  PMID: 33692022 BACKGROUND

• Slobod D, Damia A, Leali M, Spinelli E, Mauri T. Pathophysiology and Clinical Meaning of Ventilation-Perfusion Mismatch in the Acute Respiratory Distress Syndrome. Biology (Basel). 2022 Dec 30;12(1):67. doi: 10.3390/biology12010067.

  PMID: 36671759 BACKGROUND

• Borges JB, Costa EL, Bergquist M, Lucchetta L, Widstrom C, Maripuu E, Suarez-Sipmann F, Larsson A, Amato MB, Hedenstierna G. Lung inflammation persists after 27 hours of protective Acute Respiratory Distress Syndrome Network Strategy and is concentrated in the nondependent lung. Crit Care Med. 2015 May;43(5):e123-32. doi: 10.1097/CCM.0000000000000926.

  PMID: 25746507 BACKGROUND

• Borges JB, Hansen T, Larsson A, Hedenstierna G. The "normal" ventilated airspaces suffer the most damaging effects of mechanical ventilation. Intensive Care Med. 2017 Jul;43(7):1057-1058. doi: 10.1007/s00134-017-4708-1. Epub 2017 Feb 15. No abstract available.

  PMID: 28204859 BACKGROUND

• Terragni PP, Rosboch G, Tealdi A, Corno E, Menaldo E, Davini O, Gandini G, Herrmann P, Mascia L, Quintel M, Slutsky AS, Gattinoni L, Ranieri VM. Tidal hyperinflation during low tidal volume ventilation in acute respiratory distress syndrome. Am J Respir Crit Care Med. 2007 Jan 15;175(2):160-6. doi: 10.1164/rccm.200607-915OC. Epub 2006 Oct 12.

  PMID: 17038660 BACKGROUND

• Rampon GL, Simpson SQ, Agrawal R. Prone Positioning for Acute Hypoxemic Respiratory Failure and ARDS: A Review. Chest. 2023 Feb;163(2):332-340. doi: 10.1016/j.chest.2022.09.020. Epub 2022 Sep 23.

  PMID: 36162482 BACKGROUND

• Gattinoni L, Taccone P, Carlesso E, Marini JJ. Prone position in acute respiratory distress syndrome. Rationale, indications, and limits. Am J Respir Crit Care Med. 2013 Dec 1;188(11):1286-93. doi: 10.1164/rccm.201308-1532CI.

  PMID: 24134414 BACKGROUND

• Fernandez R, Trenchs X, Klamburg J, Castedo J, Serrano JM, Besso G, Tirapu JP, Santos A, Mas A, Parraga M, Jubert P, Frutos F, Anon JM, Garcia M, Rodriguez F, Yebenes JC, Lopez MJ. Prone positioning in acute respiratory distress syndrome: a multicenter randomized clinical trial. Intensive Care Med. 2008 Aug;34(8):1487-91. doi: 10.1007/s00134-008-1119-3. Epub 2008 Apr 22.

  PMID: 18427774 BACKGROUND

• Taccone P, Pesenti A, Latini R, Polli F, Vagginelli F, Mietto C, Caspani L, Raimondi F, Bordone G, Iapichino G, Mancebo J, Guerin C, Ayzac L, Blanch L, Fumagalli R, Tognoni G, Gattinoni L; Prone-Supine II Study Group. Prone positioning in patients with moderate and severe acute respiratory distress syndrome: a randomized controlled trial. JAMA. 2009 Nov 11;302(18):1977-84. doi: 10.1001/jama.2009.1614.

  PMID: 19903918 BACKGROUND

• 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.

  PMID: 23688302 BACKGROUND

• Mathews KS, Soh H, Shaefi S, Wang W, Bose S, Coca S, Gupta S, Hayek SS, Srivastava A, Brenner SK, Radbel J, Green A, Sutherland A, Leonberg-Yoo A, Shehata A, Schenck EJ, Short SAP, Hernan MA, Chan L, Leaf DE; STOP-COVID Investigators. Prone Positioning and Survival in Mechanically Ventilated Patients With Coronavirus Disease 2019-Related Respiratory Failure. Crit Care Med. 2021 Jul 1;49(7):1026-1037. doi: 10.1097/CCM.0000000000004938.

  PMID: 33595960 BACKGROUND

• Mojoli F, Bouhemad B, Mongodi S, Lichtenstein D. Lung Ultrasound for Critically Ill Patients. Am J Respir Crit Care Med. 2019 Mar 15;199(6):701-714. doi: 10.1164/rccm.201802-0236CI.

  PMID: 30372119 BACKGROUND

• Jimenez JV, Weirauch AJ, Culter CA, Choi PJ, Hyzy RC. Electrical Impedance Tomography in Acute Respiratory Distress Syndrome Management. Crit Care Med. 2022 Aug 1;50(8):1210-1223. doi: 10.1097/CCM.0000000000005582. Epub 2022 May 23.

  PMID: 35607967 BACKGROUND

• He HW, Long Y, Chi Y, Yuan SY, Zhou X, Su LX, Cheng W, Fu F, Zhao ZQ. [Technology specification of bedside hypertonic saline-contrast electrical impedance tomography of lung perfusion and clinical application]. Zhonghua Yi Xue Za Zhi. 2021 Apr 20;101(15):1097-1101. doi: 10.3760/cma.j.cn112137-20200926-02723. Chinese.

  PMID: 33878839 BACKGROUND

• He H, Chi Y, Long Y, Yuan S, Zhang R, Frerichs I, Moller K, Fu F, Zhao Z. Bedside Evaluation of Pulmonary Embolism by Saline Contrast Electrical Impedance Tomography Method: A Prospective Observational Study. Am J Respir Crit Care Med. 2020 Nov 15;202(10):1464-1468. doi: 10.1164/rccm.202005-1780LE. No abstract available.

  PMID: 32585116 BACKGROUND

• He H, Chi Y, Long Y, Yuan S, Frerichs I, Moller K, Fu F, Zhao Z. Influence of overdistension/recruitment induced by high positive end-expiratory pressure on ventilation-perfusion matching assessed by electrical impedance tomography with saline bolus. Crit Care. 2020 Sep 29;24(1):586. doi: 10.1186/s13054-020-03301-x.

  PMID: 32993811 BACKGROUND

• Spinelli E, Kircher M, Stender B, Ottaviani I, Basile MC, Marongiu I, Colussi G, Grasselli G, Pesenti A, Mauri T. Unmatched ventilation and perfusion measured by electrical impedance tomography predicts the outcome of ARDS. Crit Care. 2021 Jun 3;25(1):192. doi: 10.1186/s13054-021-03615-4.

  PMID: 34082795 BACKGROUND

• Zarantonello F, Andreatta G, Sella N, Navalesi P. Prone Position and Lung Ventilation and Perfusion Matching in Acute Respiratory Failure due to COVID-19. Am J Respir Crit Care Med. 2020 Jul 15;202(2):278-279. doi: 10.1164/rccm.202003-0775IM. No abstract available.

  PMID: 32437251 BACKGROUND

• 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.

  PMID: 40394400 DERIVED

Biospecimen

Retention: SAMPLES WITH DNA

Arterial blood gas analysis, blood routine, liver and kidney function, coagulation, and BNP

MeSH Terms

Conditions

Respiratory Distress Syndrome

Condition Hierarchy (Ancestors)

Lung Diseases; Respiratory Tract Diseases; Respiration Disorders

Study Officials

• Rui Wang, Dr.

  Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China

  STUDY DIRECTOR

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator

Study Record Dates

• First Submitted: February 28, 2023
• First Posted: March 13, 2023
• Study Start: April 1, 2023
• Primary Completion: April 30, 2025
• Study Completion: May 31, 2025
• Last Updated: June 15, 2025

Record last verified: 2025-06

Data Sharing

• IPD Sharing: Will not share

Locations

CN (1)