On the PhonE Respiratory rAte Study (OPERA)

Study Overview
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Brief Summary
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Introduction. The increasing use of telephone medical advice requires the development of telemedicine tools to assess the patient's severity. Respiratory rate (RR) is a simple vital parameter and is often associated with morbidity and mortality of patients. There is no standardized measure of RR by telephone. Objective: The investigators wanted to evaluate the RR measurement by phone using a smartphone application called RRate. Methods. Adults who have been admitted for less than 6 hours to the emergency department after calling Center 15 and whose main reason for consultation is dyspnea will be included. Patients with non-invasive or tracheotomized ventilation will be excluded. The main objective will be to compare by Bland-Altman method the accuracy of the RRate measurement by phone to a one-minute RR measurement at patient's bedside. Secondary endpoints will evaluate the length of RR measurement according to the different methods used; measurement failure criteria; the accuracy of different measurement techniques (RRate at patient's bedside, impedancemetry, traditional measurement during 15s or 30s). Expected Results. The accuracy of the RR measurement by RRate over the telephone should be within the limits of agreement. The measurement time should be shorter with the RRate application than with traditional methods. However, the measurement by telephone should not always be feasible in patients with mild dyspnea or with poorly audible breathing.

Official Title
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Evaluation de la précision d'Une Mesure téléphonique de la fréquence Respiratoire à l'Aide d'Une Application Mobile - The OPERA Study (On the PhonE Respiratory rAte)

Conditions
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Respiratory Rate

Intervention / Treatment
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* Device: RRate Mobile app


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age >18yo Dyspnea as main reason for consultation Regulated by Centre 15 Admitted for less than 6hours at emergency department Exclusion Criteria: Non invasive or tracheotomized ventilation Cognitive impairment Pregnancy

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

| Intervention/Treatment |
| --- |
|Device: RRate Mobile app|Test respiratory rate with RRate application|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| RRate app on the phone precision | To compare withBland-Altman analysis the accuracy of the RRate measurement by phone to a one-minute respiratory rate measurement at patient's bedside | 1 minute | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Efficiency | length of RR measurement according to the different methods used | 1 minute | 
| Measurement failure criteria by different Rrate methods (by phone, next to the patient and the reference method) | Wether coughing, talking during measurement, phone hold by another person, has an impact on measurement possibility. The gap between the measurement by different RRate methods (by phone, next to the patient and the reference method) | 1 minute | 
| Accuracy | Bland Altman analysis : between one minute measurement at patient's bedside and other measurements : RRate app at patient's bedside, impedancemetry, traditional measurement during 15 seconds or 30 seconds | 1 minute | 
| Clinical impact | qSOFA (sequential Organ Failure Assesment score) obtained with different measurement of the RRate at 60 second | 1 minute | 
| Reproducibility | Coefficient of variation and Intra-class correlation, of respiratory rate measured twice with : RRate app on the phone, RRate app at patient's bedside, 15 seconds measurement. | 1 minute | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Telemedicine, Respiratory Rate, Dyspnea, Emergencies