Impact of Inflammation Biomarkers on the Acute Respiratory Distress Syndrome (ARDS) Definition

NCT ID: NCT01161901

Last Updated: 2014-07-08

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

134 participants

Study Classification

OBSERVATIONAL

Study Start Date

2010-06-30

Study Completion Date

2011-11-30

Brief Summary

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The ARDS has a clinical definition with criteria of the American-European Consensus Conference (1994). This definition inconveniently applies to a lot of patients with acute respiratory failure.

We know that there are 2 forms of ARDS morphology on CT scan : "lobar attenuation" (loss of aeration with no concomitant excess in lung tissue) predominating in the lower lobes and "non lobar attenuation" with diffuse and massive loss of aeration with excess lung tissue in all the pulmonary parenchyma.

Today, plasmatic biomarkers are used as prognostic and diagnostic markers of ARDS. Some of them are characteristics of the different damages in the ARDS (alveolar epithelium and vascular endothelium lesions) : sRAGE, SP-D, PAI 1 and sICAM 1.

This study's hypothesis is that patients with ARDS criteria and lobar morphology on CT scan present loss of aeration but no inflammatory pulmonary oedema, whereas patients with non lobar morphology on CT scan present both characteristics.

The primary purpose of our protocol is to show that the patients who respond to ARDS criteria and have a lobar morphology on CT scan do not have an elevation of the biomarkers specific to the pulmonary aggression of ARDS.

Detailed Description

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This multicentric prospective observational study will compare the level of different biomarkers specific to ARDS damages : the soluble form of the receptor for advanced glycation end products (sRAGE), the surfactant protein D (SP-D), Plasminogen Activator Inhibitor type 1 (PAI-1) and Soluble Intercellular Adhesion Molecule-1 (sICAM 1) in the two pulmonary morphologies of ARDS on CT scan : lobar and non lobar.

Patients under mechanical ventilation and with ARDS criteria for less than 24 hours(American-European Consensus Conference, 1994) will be enrolled.

Within 24 hours of enrolment, 10ml of blood sample will be collected and stored at -80°C. Plasmatic biomarker concentrations will be determined through ELISA method.

Within 48 hours of enrolment, patients will have a pulmonary CT scan without injection (end of expiration and ZEEP), a classical practice in this pathology.

Nine university hospitals will take part in this study.

Conditions

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Acute Respiratory Distress Syndrome

Study Design

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Study Time Perspective

CROSS_SECTIONAL

Study Groups

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blood sample

blood sample

Intervention Type PROCEDURE

This study's hypothesis is that patients with ARDS criteria and lobar morphology on CT scan present loss of aeration but no inflammatory pulmonary oedema, whereas patients with non lobar morphology on CT scan present both characteristics.

The primary purpose of our protocol is to show that the patients who respond to ARDS criteria and have a lobar morphology on CT scan do not have an elevation of the biomarkers specific to the pulmonary aggression of ARDS.

Interventions

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blood sample

This study's hypothesis is that patients with ARDS criteria and lobar morphology on CT scan present loss of aeration but no inflammatory pulmonary oedema, whereas patients with non lobar morphology on CT scan present both characteristics.

The primary purpose of our protocol is to show that the patients who respond to ARDS criteria and have a lobar morphology on CT scan do not have an elevation of the biomarkers specific to the pulmonary aggression of ARDS.

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* Patients \> 18 years
* Patients within the first 24 hours after onset of ARDS according to the 1994 American-European Consensus Conference (AECC)
* Patients under mechanical ventilation

Exclusion Criteria

* Pregnancy
* Acute exacerbation of diabetes
* Dialysis for end-stage kidney disease
* Alzheimer's disease
* Amyloidosis
* Evolutive neoplastic lesion
* Chronic hepatic disease: type C hepatitis, non alcoholic cirrhosis and adenocarcinoma.
* Evolutive COPD
* Patients enrolled in another study
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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University Hospital, Clermont-Ferrand

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Jean-Michel CONSTANTIN

Role: PRINCIPAL_INVESTIGATOR

University Hospital, Clermont-Ferrand

Locations

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CHU Clermont-Ferrand

Clermont-Ferrand, , France

Site Status

Countries

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France

Other Identifiers

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CHU-0078

Identifier Type: -

Identifier Source: org_study_id

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