Prehospital Lactate Levels Obtained in the Ambulance and Prediction of 2-Day In-Hospital Mortality in Patients With Traumatic Brain Injury.

BACKGROUND AND OBJECTIVES: To analyze the ability of prehospital lactate levels to predict 2-day in-hospital mortality in patients with traumatic brain injury (TBI), severe TBI (Glasgow Coma Scale (GCS) ≤ 8 points), and mild or moderate TBI (GCS ≥ 9 points). Second, 90-day mortality was also explored. METHODS: This was a prospective, multicenter, emergency medical services (EMSs) delivery, ambulance-based, derivation-validation cohort study developed in 5 tertiary hospitals (Spain), from November 1, 2019, to July 31, 2022. Patients were recruited from among all phone requests for emergency assistance among adults who were later evacuated to referral hospitals with acute TBI. The exclusion criteria were minors, pregnancy, trauma patients without TBI, delayed presentations, patients were discharged in situ, participants with cardiac arrest, and unavailability to obtain a blood sample. The primary outcome was all-cause 2-day in-hospital mortality and 90-day mortality in patients with moderate or mild TBI compared with patients with severe TBI. Clinical and analytical parameters (lactate and glucose) were collected. The discriminative power (area under the receiver operating characteristic curve [AUC]) and calibration curve were calculated for 2 geographically separated cohorts. RESULTS: A total of 509 patients were ultimately included. The median age was 58 years (interquartile range: 43-75), and 167 patients were female (32.8%). The primary outcome occurred in 9 (2.2%) of 415 patients with moderate or mild TBI and in 42 (44.7%) of 94 patients with severe TBI. The predictive capacity of the lactate concentration was globally validated in our cohort, for which the AUC was 0.874 (95% CI 0.805-0.942) for the validation cohort. The ability of the GCS score to predict lactate concentration was greater in patients with a GCS score ≥9 points, with an AUC of 0.925 (95% CI 0.808-1.000) and a negative predictive value of 99.09 (95% CI 98.55-99.64) in the validation cohort. CONCLUSION: Our results show the benefit of using lactate in all patients with TBI, particularly in those with a GCS ≥9 points. Routine incorporation of lactate in the screening of patients with TBI could presumably reduce mortality and deterioration rates because of quicker and better identification of patients at risk.

Out-of-hospital birth training, experience and confidence of Australian rural volunteer ambulance officers.

INTRODUCTION: Unplanned out-of-hospital births represent less than 1% of ambulance requests for assistance. However, these call-outs have a high risk of life-threatening complications, which are particularly complex in rural or remote settings with limited accessibility to specialist care support. Many community hospitals no longer provide obstetrics care, so birth parents must travel to larger regional or metropolitan hospitals for assistance. Increased travel time may increase the risk of unplanned out-of-hospital birth and/or complications such as postpartum haemorrhage and neonatal mortality. Rural volunteer ambulance officers (VAOs) are an integral component of Australia's healthcare system, especially in regional and remote areas. Although VAO response to unplanned out-of-hospital births may be considered rare compared to calls to other case types, provision of adequate care is paramount in these potentially high-risk situations. This research investigates Australian rural VAOs' perceptions of their training, experience and confidence regarding unplanned out-of-hospital birth and planned homebirth with obstetric emergencies where ambulance assistance is required. METHODS: Semi-structured interviews and focus groups were undertaken from late 2021 to mid-2023 via telephone or online videoconference. Sessions were audio-recorded and transcribed verbatim. Data were analysed and coded into themes using Braun and Clarke's six-step process for semantic coding and reflexive thematic analysis. RESULTS: Twenty-eight participants were interviewed from six Australian states and territories, all of whom worked in rural and remote Australia. Ten participants were male, 17 female and one was male-adjacent, with length of VAO experience ranging from 3 months to 29 years. Participants came from seven jurisdictional ambulance services.| Four themes emerged from analysis: (1) Lack of education and exposure to birth resulted in low confidence. Most participants reported significant anxiety attending obstetric call-outs, and explained under-utilisation of specific obstetric and neonatal skills meant skills decay was an issue; (2) limitations were discussed regarding VAO scope of practice and accessing medical equipment specifically required for birthing and neonates that could impact patient care; (3) logistical and communication difficulties were discussed. Long distances to definitive care, potentially limited backup during emergencies and potential unavailability of aeromedical retrieval increased perceived complexity of cases. Telecommunication 'black holes' created a sense of further isolation for VAOs requiring support from senior clinicians; (4) there was a perception that many members of the general public were unaware VAOs often staffed the local ambulance, and expected VAOs to have the same scope of practice as a registered paramedic. Furthermore, VAOs can attend friends and family in an emergency, potentially creating psychological trauma. CONCLUSION: VAOs report being uncomfortable attending unplanned out-of-hospital births and obstetric emergencies, perceiving they have limited ability to manage complications. Backup from a registered paramedic is dependent on availability, and telecommunications are not always reliable in rural areas for online clinical advice and support. Given the distances to definitive care in regional Australia, this has serious implications for patient safety. Continued VAO education is essential for risk reduction in out-of-hospital births.

'If It Was Easy Somebody Would Have Fixed It': An Exploration of Loneliness and Social Isolation Amongst People Who Frequently Call Ambulance Services.

INTRODUCTION: The aim of the study was to explore social isolation and loneliness in those who frequently contacted the ambulance service, what factors contributed to this and how unmet needs could be addressed. METHODS: Semi-structured interviews with staff from the ambulance service and service users who were identified as frequently contacting the ambulance service. Service users also completed the UCLA loneliness scale and personal community maps. Data were analysed thematically before triangulation with the UCLA loneliness scale and personal community maps. RESULTS: The final analysis was drawn from 15 staff and seven service user participants. The relationship between social isolation and loneliness and contacting the ambulance service was a contributing, but not the driving, factor in contacting the ambulance service. For service users, we identified three key themes: (1) impact on activities of daily living and loneliness and/or isolation as a result of a health condition; (2) accessing appropriate health and social care services to meet needs; (3) the link between social isolation and/or loneliness and contact with the ambulance service. The analysis of staff data also highlighted three key themes: (1) social isolation and/or loneliness in their role; (2) access to other appropriate health and social care services; (3) the impact of austerity and Covid-19 on social isolation and/or loneliness. CONCLUSIONS: Our research emphasises the complex nature of social isolation and loneliness, including the cyclic nature of poor health and social isolation and loneliness, and how this contributes to contact with the ambulance service. PATIENT OR PUBLIC CONTRIBUTION: The advisory group for the study was supported by a public and patient representative who contributed to the design of the study documentation, data analysis and authorship.

[Prehospital Care Times and Interventions for Victims of Major Trauma in the Central Region of Portugal: A Retrospective Study]. / Tempos de Resposta e Intervenções Extra-Hospitalar à Vítima de Trauma Major na Região Centro de Portugal: Um Estudo Retrospetivo.

INTRODUCTION: The quality and promptness of prehospital care for major trauma patients are vital in order to lower their high mortality rate. However, the effectiveness of this response in Portugal is unknown. The objective of this study was to analyze response times and interventions for major trauma patients in the central region of Portugal. METHODS: This was a retrospective, descriptive study, using the 2022 clinical records of the National Institute of Medical Emergency's differentiated resources. Cases of death prior to arrival at the hospital and other non-transport situations were excluded. Five-time intervals were determined, among which are the response time (T1, between activation and arrival at the scene), on-scene time (T2), and transportation time (T5; between the decision to transport and arrival at the emergency service). For each ambulance type, averages and dispersion times were calculated, as well as the proportion of cases in which the nationally and internationally recommended times were met. The frequency of recording six key interventions was also assessed. RESULTS: Of the 3366 records, 602 were eliminated (384 due to death), resulting in 2764 cases: nurse-technician ambulance (SIV) = 36.0%, physician- nurse ambulance (VMER) = 62.2% and physician-nurse helicopter = 1.8%. In a very large number of records, it was not possible to determine prehospital care times: for example, transport time (T5) could be determined in only 29%, 13% and 8% of cases, respectively for SIV, VMER and helicopter. The recommended time for stabilization (T2 ≤ 20 min) was met in 19.8% (SIV), 36.5% (VMER) and 18.2% (helicopter). Time to hospital (T5 ≤ 45 min) was achieved in 80.0% (SIV), 93.1% (VMER) and 75.0% (helicopter) of the records. The administration of analgesia (42% in SIV) and measures to prevent hypothermia (23.5% in SIV) were the most recorded interventions. CONCLUSION: There was substantial missing data on statuses and a lack of information in the records, especially in the VMER and helicopter. According to the records, the time taken to stabilize the victim on-scene often exceeded the recommendations, while the time taken to transport them to the hospital tended to be within the recommendations.

Introdução: A qualidade e rapidez do socorro pré-hospitalar à pessoa vítima de trauma major é vital para diminuir a sua elevada mortalidade. Contudo, desconhece-se a efetividade desta resposta em Portugal. O objetivo deste estudo foi analisar os tempos de resposta e as intervenções realizadas às vítimas de trauma major na região centro de Portugal. Métodos: Estudo retrospetivo, descritivo, utilizando os registos clínicos de 2022 dos meios diferenciados do Instituto Nacional de Emergência Médica. Casos de óbito pré-chegada ao hospital e outras situações de não transporte foram excluídos. Determinaram-se cinco tempos, entre os quais o tempo de resposta (T1, decorrente entre acionamento e chegada ao local), o tempo no local (T2) e o tempo de transporte (T5, intervalo entre a decisão de transporte e a chegada ao serviço de urgência). Foram calculadas médias e medidas de dispersão para cada meio, bem como a proporção de casos em que foram cumpridos os tempos recomendados nacional e internacionalmente. Avaliou-se também a frequência de registo de seis intervenções chave. Resultados: Dos 3366 registos, eliminaram-se 602 (384 por óbito), resultando em 2764 casos [suporte imediato de vida (SIV) = 36,0%, viaturas médicas de emergência e reanimação (VMER) = 62,2%, helicóptero de emergência médica (HEM) = 1,8%]. Num elevado número de registos não foi possível determinar tempos de socorro: por exemplo, o tempo de transporte (T5) foi determinável em apenas 29%, 13%, e 8% dos casos, respetivamente para SIV, VMER e HEM. O tempo recomendado para a estabilização (T2 ≤ 20 min), foi cumprido em 19,8% (SIV), 36,5% (VMER), e 18,2% (HEM) dos regis- tos. Já o tempo de transporte (T5 ≤ 45 min) foi cumprido em 80,0% (SIV), 93,1% (VMER) e 75,0% (HEM) dos registos (avaliáveis). A administração de analgesia (42% na SIV) e as medidas de prevenção de hipotermia (23,5% na SIV) foram as intervenções mais registadas. Conclusão: Observaram-se muitos status omissos e falta de informação nos registos, sobretudo na VMER e HEM. De acordo com os registos, o tempo no local superou frequentemente as recomendações, enquanto o tempo de transporte tende a estar dentro das normas.

Ambulance professionals' experiences of teamwork in the context of a team training programme - a qualitative study.

BACKGROUND: Teamwork in the context of ambulance services exhibits unique characteristics, as this environment involves a small core team that must adapt to a dynamic team structure that involves health care professionals and emergency services. It is essential to acquire a deeper understanding of how ambulance teams operate. Therefore, this study aimed to explore the experiences of ambulance professionals with teamwork and how they were influenced by the implementation of a team training programme. METHODS: A qualitative descriptive study was conducted involving ambulance professionals who took part in focus group interviews carried out both before and after the implementation of a team training program across seven ambulance stations within a Norwegian hospital trust. The data were analysed using reflexive thematic analysis based on a deductive-inductive approach. RESULTS: Our analysis revealed 15 subthemes that characterised ambulance professionals' experiences with teamwork and a team training programme, which were organised according to the five main themes of team structure, communication, leadership, situation monitoring, and mutual support. Ambulance professionals' experiences ranged from the significance of team composition and interpersonal and professional relationships to their preferences regarding different communication styles and the necessity of team leaders within the ambulance service. The team training programme raised awareness of teamwork, while the adoption of teamwork tools was influenced by both individual and contextual factors. The Introduction/Identity, Situation, Background, Assessment and Recommendation (ISBAR) communication tool was identified as the most beneficial aspect of the programme due to its ease of use, which led to improvements in the structure and quality of consultations and information handover. CONCLUSIONS: This study documented the diverse characteristics and preferences associated with teamwork among ambulance professionals, emphasising the particular importance of proficient partnerships in this context. Participation in a team training programme was perceived as a valuable reminder of the significance of teamwork, thus providing a foundation for the enhancement of communication skills. TRIAL REGISTRATION: ClinicalTrials.gov-ID: NCT05244928.

Analysis of barriers associated with emergency medical service activation in patients with acute stroke and acute myocardial infarction from Zhongjiang County of Sichuan Province in China.

OBJECTIVES: The purpose of this study was to investigate the preferred modes of transportation to the hospital among patients with acute stroke and acute myocardial infarction (AMI), as well as to identify the factors that influence the utilization of ambulances. METHODS: We conducted a cross-sectional study, including patients who were diagnosed with acute stroke and AMI, at the people's hospital of Zhongjiang, from September 30th, 2022 to August 30th, 2023. All patients were divided into emergency medical service (EMS)-activation group and self-transportation group. Chi-square and t-tests were utilized to discern differences between groups at baseline. To screen relevant variables, we employed the Least Absolute Shrinkage and Selection Operator (LASSO) regression analysis using R package glmnet. Subsequently, we performed a logistic regression analysis to identify predictors of EMS activation according the results of LASSO regression. RESULTS: we collected 929 valid questionnaires. 26.16% of the patients required the services of EMS. 90.9% of individuals have not received any formal first aid education. 42.1% of them reported that they had no understanding of cardiovascular and cerebrovascular diseases. Diagnosed as AMI (OR 0.22, 95%CI 0.06 to 0.88) or acute cerebral infarction (OR 0.26, 0.10 to 0.68), the distance between the patient and the nearest 120 network hospital when the patient had these symptoms (OR 0.97, 0.94 to 0.99), the patient's son or daughter was there when the patient was symptomatic (OR 0.58, 0.37 to 0.94), the patient (OR 0.19, 0.05 to 0.72) and the patient's partner (wife or husband) (OR 0.36, 0.16 to 0.85) had decided that the patient needed further medical help, Among patients who did not seek immediate help after symptom onset, thinking that the symptoms will disappear spontaneously (OR 0.34, 0.13 to 0.92) or not wanting to disturb others (OR 0.06, 0.01 to 0.66) or believing that they are not important symptoms (OR 0.15, 0.05 to 0.42) were factors independently associated with less ambulance use. Age (OR 1.02, 1.00 to 1.04), Stroke patients have experienced symptoms of disturbance of consciousness or convulsions (OR 2.99, 1.72 to 5.2) were independent factors associated with increased ambulance use. CONCLUSION: There is still ambulance underutilization among patients with acute stroke and AMI in county territory of China. Moreover, it is needed to raise the level of first aid education and awareness about EMS. Additionally, private clinic doctors and the public should gain adequate understanding of the severity of acute stroke and AMI, as well as their common symptoms, the crucial importance of prompt medical intervention. Finally, we propose that all township hospitals should be integrated into the 120 emergency networks and equipped with emergency first aid capabilities, pre-hospital care, and transportation abilities.

Community First Responders' role in the current and future rural health and care workforce: a mixed-methods study.

Background: Community First Responders are trained volunteers dispatched by ambulance services to potentially life-threatening emergencies such as cardiac arrest in the first vital minutes to provide care until highly skilled ambulance staff arrive. Community First Responder schemes were first introduced to support ambulance services in rural communities, where access to prehospital emergency care is more likely to be delayed. Evidence is lacking on their contribution to rural healthcare provision, how care is provided and how this might be improved. Objectives: We aimed to describe Community First Responder activities, organisation, costs of provision and outcomes of care together with perceptions and views of patients, public, Community First Responders, ambulance service staff and commissioners of their current and future role including innovations in the rural health and care workforce. Design: We used a mixed-methods design, using a lens of pragmatism and the 'actor', 'behaviour change' and 'causal pathway' framework to integrate quantitative routine and qualitative (policy, guideline and protocol documents with stakeholder interview) data from 6 of 10 English ambulance services. We identified potential innovations in Community First Responder provision and prioritised these using a modified nominal group technique. Patients and public were involved throughout the study. Results: In 4.5 million incidents from six English regional ambulance services during 2019, pre COVID-19 pandemic, Community First Responders attended first a higher proportion of calls in rural areas (almost 4% of calls) than in urban areas (around 1.5%). They were significantly more likely to be called out to rural (vs. urban) areas and to attend older (vs. younger), white (vs. minority ethnic) people in more affluent (vs. deprived) areas with cardiorespiratory and neurological (vs. other emergency) conditions for higher-priority emergency or urgent (category 1 and 2 compared with category 3, 4 or 5) calls but did also attend lower-category calls for conditions such as falls. We examined 10 documents from seven ambulance services. Ambulance policies and protocols integrated Community First Responders into ambulance service structures to achieve the safe and effective operation of volunteers. Costs, mainly for training, equipment and support, varied widely but were not always clearly delineated. Community First Responders enabled a faster prehospital response time. There was no clear benefit in out-of-hospital cardiac arrest outcomes. A specific Community First Responder falls response reduced ambulance attendances and was potentially cost saving. We conducted semistructured interviews with 47 different stakeholders engaged in Community First Responder functions. This showed the trajectory of becoming a Community First Responder, the Community First Responder role, governance and practice, and the positive views of Community First Responders from stakeholders despite public lack of understanding of their role. Community First Responders' scope of practice varied between ambulance services and had developed into new areas. Innovations prioritised at the consensus workshop were changes in processes and structures and an expanded scope of practice supported by training, which included counselling, peer support, better communication with the control room, navigation and communication technology, and specific mandatory and standardised training for Community First Responders. Limitations: Missing data and small numbers of interviews in some stakeholder groups (patients, commissioners) are sources of bias. Future research: Future research should include a robust evaluation of innovations involving Community First Responders. Trial registration: This trial is registered as ClinicalTrials.gov, NCT04279262. Funding: This award was funded by the National Institute for Health and Care Research (NIHR) Health and Social Care Delivery Research programme (NIHR award ref: NIHR127920) and is published in full in Health and Social Care Delivery Research; Vol. 12, No. 18. See the NIHR Funding and Awards website for further award information.

Community First Responders are volunteers who attend emergencies, particularly in rural areas, and provide help until the ambulance arrives. We aimed to describe Community First Responder activities, costs and effects and get the views of the public, Community First Responders, ambulance staff and commissioners on the current and future role of Community First Responders. Our study design combined different approaches. We examined routine ambulance patient information, reviewed ambulance policies and guidelines, and gathered information from interviews to make sense of our findings. Through interviews we learned about ways that the work of Community First Responders had been enhanced or could be improved. In a 1-day workshop, a group of lay and professional experts ranked in order of importance ideas about future developments involving Community First Responders. Community First Responders arrived before ambulance staff for a higher proportion of calls in rural than in urban areas. They attended people with various conditions, including breathing problems, chest pain, stroke, drowsiness, diabetes and falls, and usually the highest-priority emergencies but also lower-priority calls. Policies aimed to ensure that Community First Responders provided safe, effective care. Costs, mainly used for management, training and equipment, were sometimes incomplete or inaccurate and varied widely between services. Community First Responders attending meant faster responses and positive experiences for those patients and relatives interviewed. A Community First Responder scheme responding to people who had fallen at home led to fewer ambulances attending and possible financial savings. Survival among people attended because their heart had stopped was no better when Community First Responders arrived early. Interviews revealed why and how Community First Responders volunteered and were trained, what they did and how they felt. Interviewees were largely positive about Community First Responders. Improvements suggested included support from colleagues or counsellors, better communication with ambulance services, technology for communication and locating patients, and better training. Community First Responders have benefits in terms of response times and patient care. Future improvements should be evaluated.

A study of prehospital EMS response time and influencing factors in the main urban area of Chongqing, China.

Shortening the prehospital emergency medical service (EMS) response time is crucial for saving lives and lowering mortality and disability rates in patients with sudden illnesses. Descriptive analyses of prehospital EMS response time and each component were conducted separately using ambulance trip data from the 120 Dispatch Command Centre in the main urban area of Chongqing in 2021, and then, logistic regression analyses were used to explore the influencing factors. The median prehospital EMS response time in the main urban area of Chongqing was 14.52 min and the mean was 16.14 min. A 44.89% of prehospital EMS response time exceeded 15 min. Response time was more likely to surpass this threshold during peak hours and in high population density areas. Conversely, lower probabilities exceeding 15 min were observed during the night shift, summer, and autumn seasons, and areas with a high density of emergency station. 33.28% of preparation time was >3 min, with the night shift and high population density areas more likely to be >3 min, while for the summer and autumn seasons, high Gross National Product (GDP) per capita areas had a lower likelihood of having preparation time >3 min. 45.52% of travel time was >11 min, with peak hours, summer and autumn, and high GDP per capita areas more likely to have had a travel time >11 min, while night shift and high emergency station density areas had a lower likelihood of travel time >11 min. The primary factors influencing prehospital EMS response time were shifts, traffic scenarios, seasons, GDP per capita, emergency station density, and population density. Relevant departments can devise effective interventions to reduce response time through resource allocation and department coordination, staff training and work arrangement optimisation, as well as public participation and education, thereby enhancing the efficiency of prehospital emergency medical services.

Navigating oneself through the eyes of the other - meanings of encountering ambulance clinicians while being in a suicidal process.

PURPOSE: The suicidal process contains both observable and non-observable phases, and patients have described the process as characterized by loneliness and darkness. Ambulance clinicians encounter patients in all phases of the suicidal process but little is known on what meaning this encounter has to the patients. The aim of this study was to elucidate meanings of encountering ambulance clinicians while being in a suicidal process. METHODS: Data were collected through fifteen individual interviews with eight participants who had lived experiences of encountering ambulance clinicians. Inductive design using phenomenological hermeneutical approach was used. FINDINGS: Patients are impacted by the clinicians, both in how they find their value in the situation, but also in expected trajectory. Three themes; 'Being impacted by representatives of society', 'Being unsure of one´s own value' and 'Regaining hope in moments of togetherness' generated the main theme ´Navigating oneself through the eyes of the other´. CONCLUSION: The way ambulance clinicians communicate impacts how patients navigate themselves in the ambivalence about living or dying, and the encounter either consolidate a feeling of being a burden, or instil hope of an endurable life. Through conversation, clinicians could support the patients in taking the first steps in the journey of recovery.

The relationship between ambulance team's professional commitment, occupational anxiety, and resilience levels.

BACKGROUND: Individuals who have the ability to bounce back from stressful events, to recover from their troubles and adverse environmental conditions by getting stronger each time are known as resilient people. Some professions may cause more occupational anxiety than others due to their characteristics and working conditions. In this research, we aimed to develop a professional commitment scale for the ambulance team. Another aim was to analyze the relationships between professional commitment, occupational anxiety, resilience, gender, job, seniority and working unit variables. METHODS: In the study, data were collected from a total of 1142 emergency ambulance workers working in Emergency Ambulance and Emergency Call Centers in 34 different cities in Turkey. Data were collected using the "Professional Commitment of Ambulance Team Scale (PCATS), Occupational Anxiety Scale for Emergency Medical Service Professionals (OASEMSP), and Resilience Scale for Adults (RSA). Scale development analyses were carried out using Classical Test Theory (CTT) and Item Response Theory (IRT). Regression analysis were used to examine the relationships between professional commitment, occupational anxiety, resilience, gender, job, seniority and working unit. RESULTS: As a result of the exploratory factor analysis (EFA), it was determined that 8 items remaining in the professional commitment scale formed a single-factor structure, explaining 46% of the variance of professional commitment of the team. The Cronbach's Alpha reliability value was 0.867. Confirmatory factor analysis (CFA) confirmed the results of exploratory factor analysis. The Cronbach's Alpha reliability coefficient obtained through CTT was 0.868, and the marginal reliability coefficient within the scope of IRT was 0.877. The test-retest reliability coefficient was calculated as 0.832, which indicates that the scale is valid and reliable. CONCLUSIONS: The study revealed that resilience has a positive effect for professional commitment while occupational anxiety has a negative effect for professional commitment. In addition, having a moderate seniority has a negative (reducing) effect for professional commitment. Other variables (gender, job, and working unit) was found to have no significant impact on professional commitment.

Lights, Sirens, and Load: Anticipatory emergency medical treatment planning causes cognitive load during emergency response driving among paramedicine students.

Paramedics face various unconventional and secondary task demands while driving ambulances, leading to significant cognitive load, especially during lights-and-sirens responses. Previous research suggests that high cognitive load negatively affects driving performance, increasing the risk of accidents, particularly for inexperienced drivers. The current study investigated the impact of anticipatory treatment planning on cognitive load during emergency driving, as assessed through the use of a driving simulator. We recruited 28 non-paramedic participants to complete a simulated baseline drive with no task and a cognitive load manipulation using the 1-back task. We also recruited 18 paramedicine students who completed a drive while considering two cases they were travelling to: cardiac arrest and infant seizure, representing varying difficulty in required treatment. The results indicated that both cases imposed considerable cognitive load, as indicated by NASA Task Load Index responses, comparable to the 1-back task and significantly higher than driving with no load. These findings suggest that contemplating cases and treatment plans may impact the safety of novice paramedics driving ambulances for emergency response. Further research should explore the influence of experience and the presence of a second individual in the vehicle to generalise to broader emergency response driving contexts.

Short-term effects of temperature-related indices on emergency ambulance dispatches due to mental and behavioral disorders in Shenzhen, China.

Introduction: The precise associations between temperature-related indices and mental and behavioral disorders (MBDs) have yet to be fully elucidated. Our study aims to ascertain the most effective temperature-related index and assess its immediate impact on emergency ambulance dispatches (EADs) due to MBDs in Shenzhen, China. Methods: EADs data and meteorological data from January 1, 2013, to December 31, 2020, in Shenzhen were collected. Distributed lag non-linear models (DLNMs) were utilized to examine the non-linear and lagged effects of temperature-related indices on EADs due to MBDs. The Quasi Akaike Information criterion (QAIC) was used to determine the optimal index after standardizing temperature-related indices. After adjusting for confounding factors in the model, we estimated the immediate and cumulative effects of temperature on EADs due to MBDs. Results: The analysis of short-term temperature effects on EADs due to MBDs revealed Humidex as the most suitable index. Referring to the optimal Humidex (3.2th percentile, 12.00°C), we observed a significant effect of Humidex over the threshold (34.6th percentile, 26.80°C) on EADs due to MBDs at lag 0-5. The cumulative relative risks for high temperature (90th percentile, 41.90°C) and extreme high temperature (99th percentile, 44.20°C) at lag 0-5 were 1.318 (95% CI: 1.159-1.499) and 1.338 (95% CI: 1.153-1.553), respectively. No significant cold effect was observed on EADs due to MBDs. Conclusion: High Humidex was associated with more EADs due to MBDs in subtropical regions. Health authorities should implement effective measures to raise public awareness of risks related to high temperature and protect vulnerable populations.

Mapping the processes and information flows of a prehospital emergency care system in Rwanda: a process mapping exercise.

OBJECTIVE: A vital component of a prehospital emergency care system is getting an injured patient to the right hospital at the right time. Process and information flow mapping are recognised methods to show where efficiencies can be made. We aimed to understand the process and information flows used by the prehospital emergency service in transporting community emergencies in Rwanda in order to identify areas for improvement. DESIGN: Two facilitated process/information mapping workshops were conducted. Process maps were produced in real time during discussions and shared with participants for their agreement. They were further validated by field observations. SETTING: The study took place in two prehospital care settings serving predominantly rural and predominantly urban patients. PARTICIPANTS: 24 healthcare professionals from various cadres. Field observations were done on 49 emergencies across both sites. RESULTS: Two maps were produced, and four main process stages were described: (1) call triage by the dispatch/call centre team, (2) scene triage by the ambulance team, (3) patient monitoring by the ambulance team on the way to the health facility and (4) handover process at the health facility. The first key finding was that the rural site had multiple points of entry into the system for emergency patients, whereas the urban system had one point of entry (the national emergency number); processes were otherwise similar between sites. The second was that although large amounts of information were collected to inform decision-making about which health facility to transfer patients to, participants found it challenging to articulate the intellectual process by which they used this to make decisions; guidelines were not used for decision-making. DISCUSSION: We have identified several areas of the prehospital care processes where there can be efficiencies. To make efficiencies in the decision-making process and produce a standard approach for all patients will require protocolising care pathways.

Performance of 21 Early Warning System scores in predicting in-hospital deterioration among undifferentiated admitted patients managed by ambulance services.

BACKGROUND: The optimal Early Warning System (EWS) scores for identifying patients at risk of clinical deterioration among those transported by ambulance services remain uncertain. This retrospective study compared the performance of 21 EWS scores to predict clinical deterioration using vital signs (VS) measured in the prehospital or emergency department (ED) setting. METHODS: Adult patients transported to a single ED by ambulances and subsequently admitted to the hospital between 1 January 2019 and 18 April 2019 were eligible for inclusion. The primary outcome was 30-day mortality; secondary outcomes included 3-day mortality, admission to intensive care or coronary care units, length of hospital stay and emergency call activations. The discriminative ability of the EWS scores was assessed using the area under the receiver operating characteristic curve (AUROC). Subanalyses compared the performance of EWS scores between surgical and medical patient types. RESULTS: Of 1414 patients, 995 (70.4%) (53.1% male, mean age 68.7±17.5 years) were included. In the ED setting, 30-day mortality was best predicted by VitalPAC EWS (AUROC 0.71, 95% CI (0.65 to 0.77)) and National Early Warning Score (0.709 (0.65 to 0.77)). All EWS scores calculated in the prehospital setting had AUROC <0.70. Rapid Emergency Medicine Score (0.83 (0.73 to 0.92)) and New Zealand EWS (0.88 (0.81 to 0.95)) best predicted 3-day mortality in the prehospital and ED settings, respectively. EWS scores calculated using either prehospital or ED VS were more effective in predicting 3-day mortality in surgical patients, whereas 30-day mortality was best predicted in medical patients. Among the EWS scores that achieved AUROC ≥0.70, no statistically significant differences were detected in their discriminatory abilities to identify patients at risk of clinical deterioration. CONCLUSIONS: EWS scores better predict 3-day as opposed to 30-day mortality and are more accurate when estimated using VS measured in the ED. The discriminatory performance of EWS scores in identifying patients at higher risk of clinical deterioration may vary by patient type.

"When you're hurt and you need serious help you call 999." Educating children about emergency services and appropriate use of 999: An evaluation study of the Blue Light Hub app.

OBJECTIVES: In the face of unprecedented demand, the Welsh Ambulance Services University NHS Trust developed 'Blue Light Hub': a new app to educate primary school-aged children about emergency services. Our overarching aim was to examine the effectiveness of the app. DESIGN: Primary school-aged children from three schools in South Wales, UK, played with the app for 2 hours over 2 weeks in class time. Children completed quizzes to assess their knowledge and awareness of, and confidence in engaging with, emergency services before and after using the app. PARTICIPANTS: Our evaluation focused on N=393 children who completed both the pre-test and post-test quizzes. On average, children were 8-9 years old (median school year, Year 4); 47.8% were male and 50.9% were female. RESULTS: After using the app, there was a significant increase in the proportion of children who knew of appropriate actions to take in non-emergency scenarios, χ2(1) = 26.01, and could provide a question a call handler would ask them if they called 999, χ2(1) = 13.79. There was also an increase in the proportion of children who could identify an National Health Service (NHS) service that could help them if they were unwell, χ2(1) = 33.31, name different roles in the NHS, χ2(1) = 12.80 and knew how dialling 111 could help them χ2(1) = 90.05 (all p values<0.001). CONCLUSION: To our knowledge, Blue Light Hub is the first app of its kind designed to educate primary school-aged children about emergency services. Our findings provide preliminary evidence that the app supports children's knowledge and awareness of emergency services.

Pediatric trauma patients in Swedish ambulance services -a retrospective observational study of assessments, interventions, and clinical outcomes.

BACKGROUND: Pediatric trauma patients constitute a significant portion of the trauma population treated by Swedish Emergency Medical Services (EMS), and trauma remains a notable cause of death among Swedish children. Previous research has identified potential challenges in prehospital assessments and interventions for pediatric patients. In Sweden, there is limited information available regarding pediatric trauma patients in the EMS. The aim of this study was to investigate the prevalence of pediatric trauma patients within the Swedish EMS and describe the prehospital assessments, interventions, and clinical outcomes. METHODS: This retrospective observational study was conducted in a region of Southwestern Sweden. A random sample from ambulance and hospital records from the year 2019 was selected. Inclusion criteria were children aged 0-16 years who were involved in trauma and assessed by EMS clinicians. RESULTS: A total of 440 children were included in the study, representing 8.4% of the overall trauma cases. The median age was 9 years (IQR 3-12), and 60.5% were male. The leading causes of injury were low (34.8%) and high energy falls (21%), followed by traffic accidents. The children were assessed as severely injured in 4.5% of cases. A quarter of the children remained at the scene after assessment. Complete vital signs were assessed in 29.3% of children, and 81.8% of children were assessed according to the ABCDE structure. The most common intervention performed by prehospital professionals was the administration of medication. The mortality rate was 0.2%. CONCLUSIONS: Pediatric trauma cases accounted for 8.4% of the overall trauma population with a variations in injury mechanisms and types. Vital sign assessments were incomplete for a significant proportion of children. The adherence to the ABCDE structure, however, was higher. The children remained at the scene after assessment requires further investigation for patient safety.

Social mass gathering events influence emergency medical services call volume.

Background: Prior literature suggests that mass gathering events pose challenges to an emergency medical services (EMS) system. We aimed to investigate whether events influence EMS call rates. Materials and methods: This study is a retrospective review of all primary response ambulance calls in Rhode Island (US) between January 1st, 2018 and August 31st, 2022. The number of EMS calls per day was taken from the state's EMS registry. Event data was collected using a Google (Google LLC, Mountain View, CA) search. We used separate Poisson regression models with the number of ambulance calls as the dependent and the social event categories sports, agricultural, music events, and public exhibitions as independent variables. All models controlled for the population at risk and the period of the COVID-19 pandemic. Results are presented as increases or decreases in calls per 100,000 inhabitants from the mean over the study period. Results: The mean number of daily EMS calls was 38 ± 4 per 100,000 inhabitants. EMS encountered significantly more missions on days with music events (+3, 95% CI [2; 3]) and public exhibitions (+2, 95% CI [1; 2]). In contrast, days with agricultural events were associated with fewer calls (-1, 95% CI [-1; 0]). We did not find any effect of sports events on call rates. Conclusion: Increased ambulance call volumes are observed on days with music events and public exhibitions. Days with agricultural events are associated with fewer EMS calls.

Head Injury Evaluation and Ambulance Diagnosis (HOME) Study protocol: a feasibility study assessing the implementation of the Canadian CT Head Rule in the prehospital setting.

INTRODUCTION: Traumatic brain injury (TBI) is a common presentation in the prehospital environment. At present, paramedics do not routinely use tools to identify low-risk patients who could be left at scene or taken to a local hospital rather than a major trauma centre. The Canadian CT Head Rule (CCHR) was developed to guide the use of CT imaging in hospital. It has not been evaluated in the prehospital setting. We aim to address this gap by evaluating the feasibility and acceptability of implementing the CCHR to patients and paramedics, and the feasibility of conducting a full-scale clinical trial of its use. METHODS AND ANALYSIS: We will recruit adult patients who are being transported to an emergency department (ED) by ambulance after suffering a mild TBI. Paramedics will prospectively collect data for the CCHR. All patients will be transported to the ED, where deferred consent will be taken and the treating clinician will reassess the CCHR, blinded to paramedic interpretation. The primary clinical outcome will be neurosurgically significant TBI. Feasibility outcomes include recruitment and attrition rates. We will assess acceptability of the CCHR to paramedics using the Ottawa Acceptability of Decision Rules Instrument. Interobserver reliability of the CCHR will be assessed between paramedics and the treating clinician in the ED. Participating paramedics and patients will be invited to participate in semistructured interviews to explore the acceptability of trial processes and facilitators and barriers to the use of the CCHR in practice. Data will be analysed thematically. We anticipate recruiting approximately 100 patients over 6 months. ETHICS AND DISSEMINATION: This study was approved by the Health Research Authority and the Research Ethics Committee (REC reference: 22/NW/0358). The results will be published in a peer-reviewed journal, presented at conferences and will be incorporated into a doctoral thesis. TRIAL REGISTRATION NUMBER: ISRCTN92566288.

Ambulance clinician use of capillary blood ketone meters to improve emergency hyperglycaemia care: A stepped-wedged controlled, mixed-methods feasibility study.

AIM: To determine whether it was feasible, safe and acceptable for ambulance clinicians to use capillary blood ketone meters for 'high-risk' diabetic ketoacidosis (DKA) recognition and fluid initiation, to inform the need for a full-powered, multi-centre trial. METHODS: Adopting a stepped-wedge controlled design, participants with hyperglycaemia (capillary blood glucose >11.0 mmol/L) or diabetes and unwell were recruited. 'High-risk' DKA intervention participants (capillary blood ketones ≥3.0 mmol/L) received paramedic-led fluid therapy. Participant demographic and clinical data were collated from ambulance and hospital care records. Twenty ambulance and Emergency Department clinicians were interviewed to understand their hyperglycaemia and DKA care experiences. RESULTS: In this study, 388 participants were recruited (Control: n = 203; Intervention: n = 185). Most presented with hyperglycaemia, and incidence of type 1 and type 2 diabetes was 18.5% and 74.3%, respectively. Ketone meter use facilitated 'high-risk' DKA identification (control: 2.5%, n = 5; intervention: 6.5%, n = 12) and was associated with improved hospital pre-alerting. Ambulance clinicians appeared to have a high index of suspicion for hospital-diagnosed DKA participants. One third (33.3%; n = 3) of Control and almost half (45.5%; n = 5) of Intervention DKA participants received pre-hospital fluid therapy. Key interview themes included clinical assessment, ambulance DKA fluid therapy, clinical handovers; decision support tool; hospital DKA management; barriers to hospital DKA care. CONCLUSIONS: Ambulance capillary blood ketone meter use was deemed feasible, safe and acceptable. Opportunities for improved clinical decision making, support and safety-netting, as well as in-hospital DKA care, were recognised. As participant recruitment was below progression threshold, it is recommended that future-related research considers alternative trial designs. CLINICALTRIALS: gov: NCT04940897.