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

June 13, 2025 updated by: Rui Wang, Beijing Chao Yang Hospital

Improvement of Acute Respiratory Distress Syndrome Ventilation-perfusion Matching by Prone Positioning Assessed by Electrical Impedance Tomography

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.

Study Overview

Status

Completed

Conditions

Study Type

Observational

Enrollment (Actual)

77

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
    • Beijing
      • Beijing, Beijing, China, 100020
        • Beijing Chao-Yang Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

ARDS Patients with PaO2/FiO2 < 150mmH

Description

Inclusion Criteria:

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

Exclusion Criteria:

  1. Contraindication to the prone position;
  2. Contraindication to the EIT;
  3. Hemodynamically unstable;
  4. Patients with hypernatremia;
  5. Patients have received extracorporeal membrane oxygenation treatment.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
ICU mortality
Time Frame: 28 days after enrollment
The death of patients that occurs during their stay in the ICU
28 days after enrollment

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Ventilator-free days
Time Frame: 28 days after enrollment
Days without receiving invasive ventilation at day 28.
28 days after enrollment

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Beijing Chao Yang Hospital

Investigators

  • Study Director: Rui Wang, Dr., Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

April 1, 2023

Primary Completion (Actual)

April 30, 2025

Study Completion (Actual)

May 31, 2025

Study Registration Dates

First Submitted

February 28, 2023

First Submitted That Met QC Criteria

March 9, 2023

First Posted (Actual)

March 13, 2023

Study Record Updates

Last Update Posted (Actual)

June 15, 2025

Last Update Submitted That Met QC Criteria

June 13, 2025

Last Verified

June 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2022-KE-615

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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