Narrow Band Imaging Bronchoscopy During SARS-CoV2 Infection

Study Overview
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Brief Summary
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Vascular modifications have been described during SARS-CoV2 infection, especially a dilatation of the bronchial arteries. Within the airway wall, small branches of the bronchial arteries cross the muscle layer to develop a submucosal network. The Narrow Band Imaging technique is used during bronchoscopy to achieve a maximum contrast of vessels and the surrounding mucosa. Therefore, it enables to observe the microvessel structure and its distribution in the bronchial mucosa. The aim of this study is to describe the vasculature pattern of the bronchial tree during infection with SARS-CoV2.

Official Title
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Description of the Vasculature Pattern of the Bronchial Tree During Infection With SARS-CoV2 by Narrow Band Imaging Bronchoscopy

Conditions
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Covid19, Bronchoscopy, Narrow-band Imaging

Intervention / Treatment
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* Other: NBI images and/or videos


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients who undergo bronchoscopy with image and/or videos recording of NBI aspect of the proximal bronchial tree (carina, right and left upper lobe). Patients hospitalized with SARS-CoV2 infection proven by RT-PCR test patients hospitalized with lower respiratory tract infections unrelated to SARS-CoV2 (RT-PCR negative for SARS-CoV2) Patients who have had bronchoscopy performed as part of the assessment of a distal pulmonary nodule (RT-PCR negative for SARS-CoV2). Exclusion Criteria: Patients under legal protection Patients who refuses the use of his personal medical data

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental<br>Patients hospitalized with SARS-CoV2 infection proven by RT-PCR test | Other: NBI images and/or videos<br>* A library of NBI images and/or videos will be established from previously recorded bronchoscopies in 30 patients (10 with a SARS-CoV2 infection, 10 with a lower respiratory tract infection not related to SARS-CoV2, and 10 in patients with pulmonary nodule). NBI images and/or videos of the bronchial tree will then be analysed by three experimented interventional pulmonologists blinded to the patient ID. Each investigator will describe the vasculature pattern according to a prespecified grid: Normal mucosal vascularity / increased capillary density / presence of capillary loops / presence of dotted vessels / complex vascular networks of tortuous vessels or abrupt ending vessels / dilated longitudinal vessels. In case of discordance between the investigators, images will be reviewed to obtain a consensus.<br>|
| Comparator<br>Patients hospitalized with lower respiratory tract infections unrelated to SARS-CoV2 (RT-PCR negative for SARS-CoV2) | Other: NBI images and/or videos<br>* A library of NBI images and/or videos will be established from previously recorded bronchoscopies in 30 patients (10 with a SARS-CoV2 infection, 10 with a lower respiratory tract infection not related to SARS-CoV2, and 10 in patients with pulmonary nodule). NBI images and/or videos of the bronchial tree will then be analysed by three experimented interventional pulmonologists blinded to the patient ID. Each investigator will describe the vasculature pattern according to a prespecified grid: Normal mucosal vascularity / increased capillary density / presence of capillary loops / presence of dotted vessels / complex vascular networks of tortuous vessels or abrupt ending vessels / dilated longitudinal vessels. In case of discordance between the investigators, images will be reviewed to obtain a consensus.<br>|
| Comparator 2<br>Patients who have had bronchoscopy performed as part of the assessment of a distal pulmonary nodule (RT-PCR negative for SARS-CoV2). | Other: NBI images and/or videos<br>* A library of NBI images and/or videos will be established from previously recorded bronchoscopies in 30 patients (10 with a SARS-CoV2 infection, 10 with a lower respiratory tract infection not related to SARS-CoV2, and 10 in patients with pulmonary nodule). NBI images and/or videos of the bronchial tree will then be analysed by three experimented interventional pulmonologists blinded to the patient ID. Each investigator will describe the vasculature pattern according to a prespecified grid: Normal mucosal vascularity / increased capillary density / presence of capillary loops / presence of dotted vessels / complex vascular networks of tortuous vessels or abrupt ending vessels / dilated longitudinal vessels. In case of discordance between the investigators, images will be reviewed to obtain a consensus.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Variation of the vasculature pattern of the bronchial mucosa between the three patient groups |  | 2 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Covid19, bronchoscopy, Narrow-band imaging, bronchial vasculature, Acute vascular distress syndrome