Blue Protocol Assessment

Interest Assessment of the Blue Protocol in Improving Diagnosis of Dyspneic Patients in Pre- and Intra-hospital Emergency Medicine

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT04223297

Acronym

Blue P

Enrollment

115

Registered

2020-01-10

Start date

2020-01-01

Completion date

2020-09-01

Last updated

2023-01-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Dyspnea, Emergencies

Keywords

dyspnea, lung ultrasound, emergency medicine, blue protocol

Brief summary

Acute dyspnea is a common disease in emergency medicine. Mortality remains high is estimated at 15%. One third of initial diagnoses before paraclinical examination are estimated to be inaccurate. Lung ultrasound is a quick and immediate examination. Also, it is provided and performed at the bedside. The Blue protocol was designed by Daniel A. Lichtenstein as a diagnostic aid in dyspneic patients. It allows to obtain a diagnostic in more than 90% of acute dyspnea. However there is no validation in emergency medicine. The main purpose is to evaluate the interest of the Blue protocol in the management and orientation of the dyspneic patient

Interventions

PROCEDURElung ultrasound

The lung ultrasound will be performed by following the Blue protocol

Study design

Observational model

OTHER

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Inclusion criteria

* age over 18 years * dyspneic patient requiring management by an emergency physician * information given and no patient opposition.

Exclusion criteria

* patient under a legal protection measure * lack of social security

Design outcomes

Primary

Measure	Time frame	Description
concordance between the clinical diagnosis and the final diagnosis	day of arrival in emergency	comparison of the concordance between the clinical diagnosis and the final diagnosis
concordance between the diagnosis establishes after the ultrasonography and the final diagnosis	day of arrival in emergency	concordance between the diagnosis establishes after the ultrasonography and the final diagnosis

Secondary

Measure	Time frame	Description
Change of proportion of examinations leading to a change in the therapeutic hypothesis	8 months	Change of proportion of examinations leading to a change in the therapeutic hypothesis

Countries

France

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026