Dataset Information

Accuracy of emergency medical service telephone triage of need for an ambulance response in suspected COVID-19: an observational cohort study.

ABSTRACT:

Objective

To assess accuracy of emergency medical service (EMS) telephone triage in identifying patients who need an EMS response and identify factors which affect triage accuracy.

Design

Observational cohort study.

Setting

Emergency telephone triage provided by Yorkshire Ambulance Service (YAS) National Health Service (NHS) Trust.

Participants

12 653 adults who contacted EMS telephone triage services provided by YAS between 2 April 2020 and 29 June 2020 assessed by COVID-19 telephone triage pathways were included.

Outcome

Accuracy of call handler decision to dispatch an ambulance was assessed in terms of death or need for organ support at 30 days from first contact with the telephone triage service.

Results

Callers contacting EMS dispatch services had an 11.1% (1405/12 653) risk of death or needing organ support. In total, 2000/12 653 (16%) of callers did not receive an emergency response and they had a 70/2000 (3.5%) risk of death or organ support. Ambulances were dispatched to 4230 callers (33.4%) who were not conveyed to hospital and did not deteriorate. Multivariable modelling found variables of older age (1 year increase, OR: 1.05, 95% CI: 1.04 to 1.05) and presence of pre-existing respiratory disease (OR: 1.35, 95% CI: 1.13 to 1.60) to be predictors of false positive triage.

Conclusion

Telephone triage can reduce ambulance responses but, with low specificity. A small but significant proportion of patients who do not receive an initial emergency response deteriorated. Research to improve accuracy of EMS telephone triage is needed and, due to limitations of routinely collected data, this is likely to require prospective data collection.

SUBMITTER: Marincowitz C

PROVIDER: S-EPMC9114316 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature

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Publications

Accuracy of emergency medical service telephone triage of need for an ambulance response in suspected COVID-19: an observational cohort study.

Marincowitz Carl C Stone Tony T Hasan Madina M Campbell Richard R Bath Peter A PA Turner Janette J Pilbery Richard R Thomas Benjamin David BD Sutton Laura L Bell Fiona F Biggs Katie K Hopfgartner Frank F Mazumdar Suvodeep S Petrie Jennifer J Goodacre Steve S

BMJ open 20220516 5

<h4>Objective</h4>To assess accuracy of emergency medical service (EMS) telephone triage in identifying patients who need an EMS response and identify factors which affect triage accuracy.<h4>Design</h4>Observational cohort study.<h4>Setting</h4>Emergency telephone triage provided by Yorkshire Ambulance Service (YAS) National Health Service (NHS) Trust.<h4>Participants</h4>12 653 adults who contacted EMS telephone triage services provided by YAS between 2 April 2020 and 29 June 2020 assessed by ...[more]

PMID: 35577471

Similar Datasets

Project description:OBJECTIVE:To investigate the appropriateness of cases presenting to the emergency department (ED) following ambulance-based secondary telephone triage. DESIGN:A pragmatic retrospective cohort analysis of all the planned and unplanned ED presentations within 48 hours of a secondary telephone triage. SETTING:The secondary telephone triage service, called the Referral Service, and the hospitals were located in metropolitan Melbourne, Australia and operated 24 hours a day, servicing 4.25 million people. The Referral Service provides an in-depth secondary triage of cases classified as low acuity when calling the Australian emergency telephone number. POPULATION:Cases triaged by the Referral Service between September 2009 and June 2012 were linked to ED and hospital admission records (N=44,523). Planned ED presentations were cases referred to the ED following the secondary triage, unplanned ED presentations were cases that presented despite being referred to alternative care pathways. MAIN OUTCOME MEASURES:Appropriateness was measured using an ED suitability definition and hospital admission rates. These were compared with mean population data which consisted of all of the ED presentations for the state (termed the 'average Victorian ED presentation'). RESULTS:Planned ED presentations were more likely to be ED suitable than unplanned ED presentations (OR 1.62; 95% CI 1.5 to 1.7; p<0.001) and the average Victorian ED presentation (OR 1.85; 95% CI 1.01 to 3.4; p=0.046). They were also more likely to be admitted to the hospital than the unplanned ED presentation (OR 1.5; 95% CI 1.4 to 1.6; p<0.001) and the average Victorian ED presentation (OR 2.3, 95% CI 2.24 to 2.33; p<0.001). Just under 15% of cases diverted away from the emergency care pathways presented in the ED (unplanned ED attendances), and 9.5% of all the alternative care pathway cases were classified as ED suitable and 6.5% were admitted to hospital. CONCLUSIONS:Secondary telephone triage was able to appropriately identify many ED suitable cases, and while most cases referred to alternative care pathways did not present in the ED. Further research is required to establish that these were not inappropriately triaged away from the emergency care pathways.

Project description:ObjectivesTo describe how an intervention to limit direct attendance in an emergency primary healthcare service affected the contacts to the clinic and the level of care given, and which factors were associated with a change from direct attendance to telephone contact.DesignObservational study.SettingSeven Norwegian emergency primary healthcare services. The telephone triage operators are primarily registered nurses.ParticipantsRegistered patient contacts to the services during 2007-2019.InterventionsIn 2013, one of the seven services made an intervention to limit direct attendances to the emergency primary healthcare clinic. Through an advertisement in a local newspaper, the public was encouraged to call in advance. Patients who still attended directly, were encouraged to call in advance next time.MeasuresWe compared the proportions of direct attendance and telephone contact, and of consultation by a general practitioner and telephone consultation by an operator, before and after the intervention. We also compared the proportions of direct attendance regarding gender, age group, time of day and urgency level. Descriptive analyses and log binomial regression analyses were applied.ResultsThere were 1 105 019 contacts to the seven services during the study period. The average proportion of direct attendance decreased from 68.7% (95% CI 68.4% to 68.9%) to 23.4% (95% CI 23.2% to 23.6%) in the service that carried out the intervention. Telephone consultation by an operator increased from 11.7% (95% CI 11.5% to 11.8%) to 29.2% (95% CI 28.9% to 29.5%) and medical consultation by a general practitioner decreased from 78.3% (95% CI 78.1% to 78.5%) to 57.0% (95% CI 56.7% to 57.3%). The youngest and the oldest age group and women had the largest decrease in direct attendance, by -81%, -74% and -71%, respectively.ConclusionThe intervention influenced how the public contacted the service. Information campaigns on how to contact healthcare services should be implemented on a regular basis.

Project description:ObjectiveTo systematically appraise the available evidence to determine the accuracy of decision aids for emergency medical services (EMS) telephone triage of patients with chest pain suspected to be caused by acute coronary syndrome (ACS) or life-threatening conditions.DesignSystematic review.Data sourcesElectronic searches were performed in Embase 1974, Medline 1946 and CINAHL 1937 databases from 3 March 2020 to 4 March 2020.Eligibility criteriaThe review included all types of original studies that included adult patients (>18 years) who called EMS with a primary complaint of chest pain and evaluated dispatch triage priority by telephone. Outcomes of interest were a final diagnosis of ACS, acute myocardial infarction or other life-threatening conditions.Data extraction and synthesisTwo authors independently extracted data on study design, population, study period, outcome and all data for assessment of accuracy, including cross-tabulation of triage priority against the outcomes of interest. Risk of bias was assessed using the Quality Assessment of Diagnostic Accuracy Studies 2 assessment tool.ResultsSearches identified 553 papers, of which 3 were eligible for inclusion. Those reports described the evaluation of three different prediction models with variation in the variables used to detect ACS. The overall results showed that dispatch triage tools have good sensitivity to detect ACS and life-threatening conditions, even though they are used to triage signs and symptoms rather than diagnosing the patients. On the other hand, prediction models were built to detect ACS and life-threatening conditions, and therefore, prediction models showed better sensitivity and negative predictive value than dispatch triage tools.ConclusionWe have identified three prediction models for telephone triage of patients with chest pain. While they have been found to have greater accuracy than standard EMS dispatch systems, prospective external validation is essential before clinical use is considered.Prospero registration numberThis systematic review was pre-registered on the International prospective register of systematic reviews (PROSPERO) database (reference CRD42020171184).

Project description:BackgroundEmergency Medical Services (EMS) is, by its nature, a challenging context that may create risks for both patients and employees. It is also known that an organisation's safety culture has an influence on both patient and employee safety. Finnish EMS organisations lack knowledge of how their safety culture is perceived by their employees.AimThis study aims to test the psychometric properties of the Emergency Medical Services Safety Attitudes Questionnaire (EMS-SAQ) in a Finnish EMS setting. We also explore the connections between individual- and organisation-based characteristics and safety attitudes in the Finnish EMS.MethodsA cross-sectional survey study design was used. The EMS-SAQ was used to collect data via social media. The instrument measures six domains of workplace safety culture: safety climate, teamwork climate, perceptions of management, job satisfaction, working conditions and stress recognition. The 5-point Likert scale was converted to a 100-point scale and mean ≥ 75 was dichotomized as a positive. Confirmatory factor analysis (CFA) was carried out to validate the EMS-SAQ in a Finnish setting. Other results were analysed by using non-parametric tests.Results327 responses were included in the analysis. CFA showed that the total EMS-SAQ model had acceptable goodness-of-fit values in the Finnish EMS setting. Total mean scores for each safety culture domain were identified non-positively (mean score < 75); safety climate 60.12, teamwork climate 60.92, perceptions of management 56.31, stress recognition 64.55, working conditions 53.43 and job satisfaction 70.36. Higher education was connected to lower job satisfaction and the teamwork climate within the individual characteristics. All organisation-based characteristics caused at least one significant variation in the safety culture domain scores. Working area significantly affected (p < 0.05) five out of the six safety culture domain scores.ConclusionsThe EMS-SAQ is a valid tool to evaluate safety culture among the Finnish EMS organisations; it offers a novel method to evaluate safety and patient safety within the Finnish EMS organisations. According to the findings, the organisation-based characteristics more likely had an impact on safety attitudes than did the individual-based characteristics. Therefore, it is suggested that the Finnish EMS organisations undertake safety culture development at the organisational level.

Project description:ObjectivesThe ambulance service plays a pivotal role in the provision of care in out-of-hospital maternity emergencies. Telephone triage of this patient group is complex and must be sensitive to an emergency situation to prevent unnecessary delays in treatment. This study aimed to explore emergency medical dispatchers' (EMDs) perceptions of the structured protocol they use.DesignVoluntary participation in semistructured phenomenological focus groups. The participants were asked to discuss their experiences of using Medical Priority Dispatch System Protocol 24 (pregnancy, childbirth and miscarriage). Thematic analysis was applied to code and group topics. Discussion between the EMDs is presented for each theme and their experiences, including quotes, are presented to offer an overview of the maternity protocol and its use.SettingA large urban UK ambulance service.Participants23 control room staff.ResultsPerceptions of maternity emergencies, challenges with key questions, the need for sensitivity surrounding miscarriage, using prearrival instructions and postdispatch instructions to help patients and ideas for additional ProQA functionality emerged as the five overarching themes. Protocol 24 was considered to reflect many of the clinical factors EMDs associate with maternity emergencies although further factors, including some non-clinical, were suggested for inclusion. Miscarriage and termination-related calls were thought to be challenging as the language of the protocol is designed for pregnancy. However, instructions were generally considered well written and user-friendly, although some were thought to be unnecessary. EMDs were largely positive regarding the ProQA software, but felt backward navigation was difficult if a situation changed.ConclusionsMaternity calls were considered rewarding but complex by EMDs. We suggest changes including the use of more sensitive language in response to miscarriage and termination and make recommendations for the omission and inclusion of specific instructions, as well as enhancements to key questions and functionality. Further research is needed to ensure focus group findings are generalisable to other services, particularly in other countries.

Dataset Information

Accuracy of emergency medical service telephone triage of need for an ambulance response in suspected COVID-19: an observational cohort study.

Objective

Design

Setting

Participants

Outcome

Results

Conclusion

Publications

Accuracy of emergency medical service telephone triage of need for an ambulance response in suspected COVID-19: an observational cohort study.

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