Remote risk-stratification of dyspnoea in acute respiratory disorders: a systematic review of the literature

Predictive factors for early requirement of respiratory support through phone call to Emergency Medical Call Centre for dyspnoea: a retrospective cohort study

BACKGROUND

Acute dyspnoea is a common symptom in Emergency Medicine, and severity assessment is difficult during the first time the patient calls the Emergency Medical Call Centre.

OBJECTIVE

To identify predictive factors regarding the need for early respiratory support in patients who call the Emergency Medical Call Centre for dyspnoea.

DESIGN, SETTINGS AND PARTICIPANTS

This retrospective cohort study carried out in the Emergency Medical Call Centre of the University Hospital of Toulouse from 1 July to 31 December 2019. Patients over the age of 15 who call the Emergency Medical Call Centre regarding dyspnoea and who were registered at the University Hospital or died before admission were included in our study.

OUTCOME MEASURE AND ANALYSIS

The primary end-point was early requirement of respiratory support [including high-flow oxygen, non-invasive ventilation (NIV) or mechanical ventilation after intubation] that was initiated by the physicians staffed ambulance before admission to the hospital or within 3 h after being admitted. Associations with patients' characteristics identified during Emergency Medical Call Centre calls were assessed with a backward stepwise logistic regression after multiple imputations for missing values.

MAIN RESULTS

During the 6-month inclusion period, 1425 patients called the Emergency Medical Call Centre for respiratory issues. After excluding 38 calls, 1387 were analyzed, including 208 (15%) patients requiring respiratory support. The most frequent respiratory support used was NIV (75%). Six independent predictive factors of requirement of respiratory support were identified: chronic β2-mimetics medication [odds ratio (OR) = 2.35, 95% confidence interval (CI) 1.61-3.44], polypnea (OR = 5.78, 95% CI 2.74-12.22), altered ability to speak (OR = 2.35, 95% CI 1.55-3.55), cyanosis (OR = 2.79, 95% CI 1.81-4.32), sweats (OR = 1.93, 95% CI 1.25-3) and altered consciousness (OR = 1.8, 95% CI 1.1-3.08).

CONCLUSION

During first calls for dyspnoea, six predictive factors are independently associated with the risk of early requirement of respiratory support.

Contribution of Live Video to Physicians' Remote Assessment of Suspected COVID-19 Patients in an Emergency Medical Communication Centre: A Retrospective Study and Web-Based Survey

The COVID-19 pandemic had a major impact on emergency medical communication centres (EMCC). A live video facility was made available to second-line physicians in an EMCC with a first-line paramedic to receive emergency calls. The objective of this study was to measure the contribution of live video to remote medical triage. The single-centre retrospective study included all telephone assessments of patients with suspected COVID-19 symptoms from 01.04.2020 to 30.04.2021 in Geneva, Switzerland. The organisation of the EMCC and the characteristics of patients who called the two emergency lines (official emergency number and COVID-19 number) with suspected COVID-19 symptoms were described. A prospective web-based survey of physicians was conducted during the same period to measure the indications, limitations and impact of live video on their decisions. A total of 8957 patients were included, and 2157 (48.0%) of the 4493 patients assessed on the official emergency number had dyspnoea, 4045 (90.6%) of 4464 patients assessed on the COVID-19 number had flu-like symptoms and 1798 (20.1%) patients were reassessed remotely by a physician, including 405 (22.5%) with live video, successfully in 315 (77.8%) attempts. The web-based survey (107 forms) showed that physicians used live video to assess mainly the breathing (81.3%) and general condition (78.5%) of patients. They felt that their decision was modified in 75.7% (n = 81) of cases and caught 7 (7.7%) patients in a life-threatening emergency. Medical triage decisions for suspected COVID-19 patients are strongly influenced by the use of live video.

Régulation médicale de la dyspnée de l’enfant : intérêt d’une régulation pédiatrique

Introduction :L’évaluation téléphonique du patient pédiatrique peut être difficile à la régulation médicale du Samu-Centre 15 (aide médicale urgente [AMU] ou permanence de soins [PDS]). La dyspnée est un motif d’appel fréquent dans cette population et présente des particularités importantes comparée à la population adulte. Nous avons voulu évaluer la pertinence de l’évaluation téléphonique de la dyspnée en pédiatrie selon la qualification du médecin régulateur (urgentiste, généraliste ou pédiatre).

Matériel et méthode :Il s’agit d’une étude observationnelle rétrospective monocentrique menée au Samu de Haute-Garonne entre le 1er décembre 2018 au 31 janvier 2019. Les critères d’inclusion étaient un appel pour tout patient avec un âge inférieur à dix ans pour dyspnée. Le critère de jugement principal était le surtriage.

Résultats : Nous avons analysé 717 appels pour dyspnée pédiatrique sur la période. La non-adéquation entre la décision médicale et le devenir du patient était retrouvée chez 174 patients (24 %) : 173 patients (99 %) étaient surtriés et un patient était sous-trié (< 1 %). En analyse multivariée, les facteurs protecteurs de surtriage étaient l’âge de six mois à trois ans (OR = 0,56 ; IC 95 % = [0,36–0,86]) comparé à un âge jeune (≤ 6 mois ; référence) et l’évaluation par un régulateur de PDS (OR = 0,38 ; IC 95 % = [0,23–0,62]) ou pédiatre (OR = 0,54 ; IC 95 % = [0,34–0,86]) comparé à un régulateur de l’AMU (référence). L’appel nocturne était un facteur de risque de surtriage (OR = 1,98 ; IC 95 % = [1,39–2,84]).

Conclusion : La régulation par un pédiatre ou un médecin de la PDS permet de réduire le surtriage dans un centre où les régulateurs AMU n’ont pas d’activité pédiatrique clinique.