Emergency Medical Services Environment Research Articles

Organizational factors influencing clinical reasoning in a Swedish emergency medical service organization: An explorative qualitative case study

Introduction Clinical reasoning (CR) among healthcare professionals working in emergency medical services (EMS) who focus on ambulance care is a vital part of ensuring timely and safe patient care. The EMS environment continually fluctuates, so clinicians constantly need to adapt to new situations. Organizational support is described as important for CR, but overall, research on organizational influences for CR in an EMS context is lacking. An increased understanding of these influencing factors can assist in the development of EMS by strengthening CR among clinicians. Therefore, the purpose of this study was to investigate the organizational factors influencing EMS clinicians’ CR. Methods Using a qualitative single case study design, an EMS organization in southwestern Sweden was explored. Data were collected from participant observations of patient encounters, individual and group interviews with clinicians and organizational representatives, and organizational document audits. Data were analyzed using qualitative content analysis and triangulation of data sources. Results The results revealed several organizational influencing factors. Collaboration and information sharing internally and externally were emphasized as essential components influencing CR. Additionally, the structure for the clinicians’ ‘room for action’ appeared confused and created uncertainties for CR related to decision mandates. Conclusion The conclusion is that organizational factors do play an important role in clinicians’ CR. Moreover, the EMS community needs to develop suitable forums for discussing and developing these influencing factors across organizational hierarchies. Finally, clarification is needed on clinicians’ ‘room for action’ within their own organization but also with possible collaborators.

Epidemiological Determinants of Patient Non-Conveyance to the Hospital in an Emergency Medical Service Environment.

The increasing prevalence of comorbidities worldwide has spurred the need for time-effective pre-hospital emergency medical services (EMS). Some pre-hospital emergency calls requesting EMS result in patient non-conveyance. Decisions for non-conveyance are sometimes driven by the patient or the clinician, which may jeopardize the patients' healthcare outcomes. This study aimed to explore the distribution and determinants of patient non-conveyance to hospitals in a Middle Eastern national Ambulance Service that promotes the transportation of all emergency call patients and does not adopt clinician-based non-conveyance decision. Using R Language, descriptive, bivariate, and binary logistic regression analyses were conducted for 334,392 multi-national patient non-conveyance emergency calls from June 2018 to July 2022, from a total of 1,030,228 calls to which a response unit was dispatched. After data pre-processing, 237,862 cases of patient non-conveyance to hospital were retained, with a monthly average of 41.96% (n = 8799) of the emergency service demands and a standard deviation of 5.49% (n = 2040.63). They predominantly involved South Asians (29.36%, n = 69,849); 64.50% (n = 153,427) were of the age category from 14 to 44 years; 61.22% (n = 145,610) were male; 74.59% (n = 177,424) from the urban setting; and 71.28% (n = 169,552) had received on-scene treatment. Binary logistic regression with full variables and backward methods identified the final models of the determinants of patient non-conveyance decisions with an Akaike information criterion prediction estimator, respectively, of (250,200) and (250,169), indicating no significant difference between both models (Chi-square test; p-value = 0.63). Despite exercising a cautious protocol by encouraging patient transportation to hospital, patient non-conveyance seems to be a problem in the healthcare system that strains the pre-hospital medical response teams' resources. Policies and regulations should be adopted to encourage individuals to access other primary care centers when required rather than draining emergency services for non-emergency situations.

Age Friendly Emergency Medicine Services: Integrating What Matters, Medications, Mobility, and Mentation into Emergency Response.

Our population is aging. The Age Friendly Health System (AFHS) initiative by the Institute of Healthcare Improvement (IHI) includes the 4 M's of What Matters, Medications, Mobility, and Mentation, and is at the forefront of older adult health care. When applying the 4M's to emergency medical services (EMS), the benefits include avoiding unnecessary transports and helping the patient stay healthy and safe in their home setting. The University of North Texas Health Science Center and other partnerships aspired to designate MedStar the first AFHS in the country within EMS practice. The Plan-Do-Study-Act (PDSA) cycle aimed at various changes with the AFHS components of What Matters and Medications within an electronic medical record (EMR) algorithm for emergency medical paramedics. Additionally, previously piloted geriatric practice leadership institute projects embedded Mentation and Mobility by including specific screenings in the EMR. The preliminary result in the PDSA described showed 52% of older adults answered health when asked What Matters most to them today. However, updated data as of January 2022, showed an overwhelming 6732 (69%) patients out of 9685 patients, answered health when asked What Matters most to them today. Additionally, the EMR identifies high-risk medications. Paramedics can now verify potential risks and develop a care plan based on the identified high-risk medications. Implementing AFHS components allows for better care delivery and outcomes as our older population is growing and embraces more complexities. The data is still novel but promising, requiring longitudinal information before conclusions can be considered. IHI is currently reviewing opportunities to expand its models of care into emergency medicine, behavioral health, and other settings. MedStar sets the example that EMS can practice the AHFS approach serving as a model for the EMS environment. We are currently awaiting feedback from IHI regarding our request to designate MedStar the first AFHS EMS practice in the country.

Medication Dosing Safety for Pediatric Patients: Recognizing Gaps, Safety Threats, and Best Practices in the Emergency Medical Services Setting. A Position Statement and Resource Document from NAEMSP

Background Millions of patients receive medications in the Emergency Medical Services (EMS) setting annually, and dosing safety is critically important. The need for weight-based dosing in pediatric patients and variability in medication concentrations available in the EMS setting may require EMS providers to perform complex calculations to derive the appropriate dose to deliver. These factors can significantly increase the risk for harm when dose calculations are inaccurate or incorrect. Methods We conducted a scoping review of the EMS, interfacility transport and emergency medicine literature regarding pediatric medication dosing safety. A priori, the authors identified four research topics: (1) what are the greatest safety threats that result in significant dosing errors that potentially result in harm to patients, (2) what practices or technologies are known to enhance dosing safety, (3) can data from other settings be extrapolated to the EMS environment to inform dosing safety, and (4) what impact could standardization of medication formularies have on enhancing dosing safety. To address these topics, 17 PICO (Patient, Intervention, Comparison, Outcome) questions were developed and a literature search was performed. Results After applying exclusion criteria, 70 articles were reviewed. The methods for the investigation, findings from these articles and how they inform EMS medication dosing safety are summarized here. This review yielded 11 recommendations to improve safety of medication delivery in the EMS setting. Conclusion These recommendations are summarized in the National Association of EMS Physicians® position statement: Medication Dosing Safety for Pediatric Patients in Emergency Medical Services.

Students’ views on the need for hostile environment awareness training for South African emergency medical care students

Background. South Africans experience high levels of contact crime, including assault, robbery and hijacking. Emergency medical services (EMS) are frequently called to the scene of such incidents. Their presence in these potentially hostile environments increases the risk of South African (SA) paramedics and paramedic students becoming victims of crime and violence. A 2015 study showed that ~66% of SA EMS staff reported being assaulted while on duty. During a 10-month period in 2016, Western Cape Province recorded >40 incidents of physical violence against their EMS personnel. Questions are being asked about how well prepared EMS staff are to operate in potentially hostile environments. Objectives. To explore emergency medical care (EMC) students’ experiences of violence and crime and their views on the need for hostile environment awareness training (HEAT) as part of their undergraduate degree programmes. Methods. A self-designed, non-validated, cross-sectional online survey questionnaire was used to document the experiences, views and opinions of 113 undergraduate EMC students from 4 SA universities. The questionnaire consisted of 24 closed-ended questions with pre-set Likert scale options focusing on documenting participants’ experiences, views and opinions regarding hostile environments and the need for HEAT. Results. A high percentage of participants (92%) indicated feeling unsafe while engaging in clinical learning shifts; 63% specified that they had personally witnessed violence against EMS crews, and 32% indicated that they had been assaulted while on duty. Unsurprisingly, 81% of the respondents felt that there is a need for inclusion of HEAT in the undergraduate curriculum. Conclusions. Participation in clinical learning shifts in the current SA prehospital EMS environment increases the risk of exposure to potentially hostile environments. Consequently, students feel unsafe and support the inclusion of HEAT as part of their undergraduate degree programmes.

Does Implementation of Biomathematical Models Mitigate Fatigue and Fatigue-related Risks in Emergency Medical Services Operations? A Systematic Review

Background: Work schedules like those of Emergency Medical Services (EMS) personnel have been associated with increased risk of fatigue-related impairment. Biomathematical modeling is a means of objectively estimating the potential impacts of fatigue on performance, which may be used in the mitigation of fatigue-related safety risks. In the context of EMS operations, our objective was to assess the evidence in the literature regarding the effectiveness of using biomathematical models to help mitigate fatigue and fatigue-related risks. Methods: A systematic review of the evidence evaluating the use of biomathematical models to manage fatigue in EMS personnel or similar shift workers was performed. Procedures proposed by the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) methodology were used to summarize and rate the certainty in the evidence. Potential bias attached to retained studies was documented using the Cochrane Collaboration's Risk of Bias tool for experimental studies. Results: The literature search strategy, which focused on both EMS personnel and non-EMS shift workers, yielded n = 2,777 unique records. One paper, which investigated non-EMS shift workers, met inclusion criteria. As part of a larger effort, managers and dispatchers of a trucking operation were provided with monthly biomathematical model analyses of predicted fatigue in the driver workforce, and educated on how they could reduce predicted fatigue by means of schedule adjustments. The intervention showed a significant reduction in the number and cost of vehicular accidents during the period in which biomathematical modeling was used. The overall GRADE assessment of evidence quality was very low due to risk of bias, indirectness, imprecision, and publication bias. Conclusions: This systematic review identified no studies that investigated the impact of biomathematical models in EMS operations. Findings from one study of non-EMS shift workers were favorable toward use of biomathematical models as a fatigue mitigation scheduling aid, albeit with very low quality of evidence pertaining to EMS operations. We propose three focus areas of research priorities that, if addressed, could help better elucidate the utility and impact of biomathematical models as a fatigue-mitigation tool in the EMS environment.

Emergency medical services (EMS) training in Kenya: Findings and recommendations from an educational assessment.

BackgroundOver the past twenty years, Kenya has been developing many important components of a prehospital emergency medical services (EMS) system. This is due to the ever-increasing demand for emergency medical care across the country. To better inform the next phase of this development, we undertook an assessment of the current state of EMS training in Kenya.MethodsA group of international and Kenyan experts with relevant EMS and educational expertise conducted an observational qualitative assessment of Kenyan EMS training institutions in 2016. Three assessment techniques were utilised: semi-structured interviews, document review, and structured observations. Recommendations were reached through a consensus process amongst the assessment team.ResultsKey findings include: (i) No national or state-level policy exists that establishes levels of EMS providers or expected fund of knowledge and skills; (ii) Training institutions have independently created their own individual training standards; (iii) Training materials are not adapted for the local context; (iv) The foundation of basic anatomy and physiology education is weak; (v) Training does not focus on symptom- or syndrome-based complaints; (vi) Students had difficulty applying foundational classroom knowledge in simulations and clinical encounters; (vii) There is limited emphasis on complex critical thinking.DiscussionStandardisation of training is needed in Kenya, including clearly defined levels of providers and expected learning outcomes. A nationally standardised EMS provider scope of practice may also help focus EMS education. Instructors must reinforce basic anatomy and physiology amongst all trainees to establish a robust foundation, then layer on field experience before trainees receive advanced training. Training graduates should be EMS providers who approach patient care with high-order symptom- or syndrome-based critical thinking. While these recommendations are specific to the Kenyan EMS environment, they may have wider applicability to other developing EMS systems in resource-limited settings.

Spread of infectious microbes during emergency medical response

BackgroundTo our knowledge, no studies to date demonstrate potential spread of microbes during actual emergency medical service (EMS) activities. Our study introduces a novel approach to identification of contributors to EMS environment contamination and development of infection control strategies, using a bacteriophage surrogate for pathogenic organisms.MethodsBacteriophage ΦX174 was used to trace cross-contamination and evaluate current disinfection practices and a hydrogen peroxide (H2O2) wipe intervention within emergency response vehicles. Prior to EMS calls, 2 surfaces were seeded with ΦX174. On call completion, EMS vehicle and equipment surfaces were sampled before decontamination, after decontamination per current practices, and after implementation of the intervention.ResultsCurrent decontamination practices did not significantly reduce viral loads on surfaces (P = .3113), but H2O2 wipe intervention did (P = .0065). Bacteriophage spread to 56% (27/48) of sites and was reduced to 54% (26/48) and 40% (19/48) with current decontamination practices and intervention practices, respectively.ConclusionResults suggest firefighters' hands were the main vehicles of microbial transfer. Current practices were not consistently applied or standardized and minimally reduced prevalence and quantity of microbial contamination on EMS surfaces. Although use of a consistent protocol of H2O2 wipes significantly reduced percent prevalence and concentration of viruses, training and promotion of surface disinfection should be provided.

The 60-Day Temperature-Dependent Degradation of Midazolam and Lorazepam in the Prehospital Environment

Background. The choice of the optimal benzodiazepine to treat prehospital status epilepticus is unclear. Lorazepam is preferred in the emergency department, but concerns about nonrefrigerated storage limits emergency medical services (EMS) use. Midazolam is increasingly popular, but its heat stability is undocumented.Objective. This study evaluated temperature-dependent degradation of lorazepam and midazolam after 60 days in the EMS environment.Methods. Lorazepam or midazolam samples were collected prior to (n = 139) or after (n = 229) 60 days of EMS deployment during spring–summer months in 14 metropolitan areas across the United States. Medications were stored in study boxes that logged temperature every minute and were stored in EMS units per local agency policy. Mean kinetic temperature (MKT) exposure was derived for each sample. Drug concentrations were determined in a central laboratory by high-performance liquid chromatography. Concentration as a function of MKT was analyzed by linear regression.Results. Prior to deployment, measured concentrations of both benzodiazepines were 1.0 relative to labeled concentration. After 60 days, midazolam showed no degradation (mean relative concentration 1.00, 95% confidence interval [CI] 1.00–1.00) and was stable across temperature exposures (adjusted R2 –0.008). Lorazepam experienced little degradation (mean relative concentration 0.99, 95% CI 0.98–0.99), but degradation was correlated to increasing MKT (adjusted R2 0.278). The difference between the temperature dependence of degradation of midazolam and lorazepam was statistically significant (T = –5.172, p < 0.001).Conclusions. Lorazepam experiences small but statistically significant temperature-dependent degradation after 60 days in the EMS environment. Additional study is needed to evaluate whether clinically significant deterioration occurs after 60 days. Midazolam shows no degradation over this duration, even in high-heat conditions.

Structured Inspection of Medications Carried and Stored by Emergency Medical Services Agencies Identifies Practices That May Lead to Medication Errors

Background. Medications are essential to emergency medical services (EMS) agencies when providing lifesaving care, but the EMS environment has challenges related to safe medication storage when compared with a hospital setting. We developed a structured process, based on common pharmacy practices, to review medications carried by EMS agencies to identify situations that may lead to medication error and to determine some best practices that may reduce potential errors and the risk of patient harm. Objective. To provide a descriptive account of EMS practices related to carrying and storing medications that have the potential for causing a medication administration error or patient harm. Methods. Using a structured process for inspection, an emergency medicine pharmacist and emergency physician(s) reviewed the medication carrying and storage practices of all nine advanced life support ambulance agencies within a five-county EMS region. Each medication carried and stored by the EMS agency was inspected for predetermined and spontaneously observed issues that could lead to medication error. These issues were documented and photographed. Two EMS medical directors reviewed each potential error for the risk of producing patient harm and assigned each to a category of high, moderate, or low risk. Because issues of temperature on EMS medications have been addressed elsewhere, this study concentrated on potential for EMS medication administration errors exclusive of storage temperatures. Results. When reviewing medications carried by the nine EMS agencies, 38 medication safety issues were identified (range 1 to 8 per EMS agency). Of these, 16 were considered to be high risk, 14 moderate risk, and eight low risk for patient harm. Examples of potential issues included carrying expired medications, container-labeling issues, different medications stored in look-alike vials or prefilled syringes in the same compartment, and carrying crystalloid solutions next to solutions premixed with a medication. When reviewing medications stored at the EMS agency stations, eight safety issues were identified (range from 0 to 4 per station), including five moderate-risk and three low-risk issues. No agency had any high-risk medication issues related to storage of medication stock in the station. Conclusion. We observed potential medication safety issues related to how medications are carried and stored at all nine EMS agencies in a five-county region. Understanding these issues may assist EMS agencies in reducing the potential for a medication error and risk of patient harm. More research is needed to determine whether following these suggested best practices for carrying medications on EMS vehicles actually reduces errors in medication administration by EMS providers or decreases patient harm.

Patient Safety in Emergency Medical Services: A Systematic Review of the Literature

Background. Preventable harm from medical care has been extensively documented in the inpatient setting. Emergency medical services (EMS) providers care for patients in dynamic and challenging environments; prehospital emergency care is a field that represents an area of high risk for errors and harm, but has received relatively little attention in the patient safety literature. Objective. To identify the threats to patient safety unique to the EMS environment and interventions that mitigate those threats, we completed a systematic review of the literature. Methods. We searched MEDLINE, EMBASE, and the Cumulative Index to Nursing and Allied Health Literature (CINAHL) for combinations of key EMS and patient safety terms composed by a pan-canadian expert panel using a year limit of 1999 to 2011. We excluded commentaries, opinions, letters, abstracts, and non-english publications. Two investigators performed an independent hierarchical screening of titles, abstracts, and full-text articles blinded to source. We used the kappa statistic to examine interrater agreement. Any differences were resolved by consensus. Results. We retrieved 5,959 titles, and 88 publications met the inclusion criteria and were categorized into seven themes: adverse events and medication errors (22 articles), clinical judgment (13), communication (6), ground vehicle safety (9), aircraft safety (6), interfacility transport (16), and intubation (16). Two articles were randomized controlled trials; the remainder were systematic reviews, prospective observational studies, retrospective database/chart reviews, qualitative interviews, or surveys. The kappa statistics for titles, abstracts, and full-text articles were 0.65, 0.79, and 0.87, respectively, for the first search and 0.60, 0.74, and 0.85 for the second. Conclusions. We found a paucity of scientific literature exploring patient safety in EMS. Research is needed to improve our understanding of problem magnitude and threats to patient safety and to guide interventions. Key words: emergency medical services; ambulance; prehospital; patient safety; medication error; adverse event; systematic review

Ambulance Personnel Perceptions of Near Misses and Adverse Events in Pediatric Patients

Objective. To identify emergency medical services (EMS) provider perceptions of factors that may affect the occurrence, identification, reporting, and reduction of near misses and adverse events in the pediatric EMS patient. Methods. This was a subgroup analysis of a qualitative study examining the nature of near misses and adverse events in EMS as it relates to pediatric prehospital care. Complementary qualitative methods of focus groups, interviews, and anonymous event reporting were used to collect results and emerging themes were identified and assigned to specific analytic domains. Results. Eleven anonymous event reports, 17 semistructured interviews, and two focus groups identified 61 total events, of which 12 were child-related. Eight of those were characterized by participants as having resulted in no injury, two resulted in potential injury, and two involved an ultimate fatality. Three analytic domains were identified, which included the following five themes: reporting is uncommon, blaming errors on others, provider stress/discomfort, errors of omission, and limited training. Among perceived causes of events, participants noted factors relating to management problems specific to pediatrics, problems with procedural skill performance, medication problems/calculation errors, improper equipment size, parental interference, and omission of treatment related to providers’ discomfort with the patient's age. Few participants spoke about errors they had committed themselves; most discussions centered on errors participants had observed being made by others. Conclusions. It appears that adverse events and near misses in the pediatric EMS environment may go unreported in a large proportion of cases. Participants attributed the occurrence of errors to the stress and anxiety produced by a lack of familiarity with pediatric patients and to a reluctance to cause pain or potential harm, as well as to inadequate practical training and experience in caring for the pediatric population. Errors of omission, rather than those of commission, were perceived to predominate. This study provides a foundation on which to base additional studies of both a qualitative and quantitative nature that will shed further light on the factors contributing to the occurrence, reporting, and mitigation of adverse events and near misses in the pediatric EMS setting.

Resident Field Response in an Emergency Medicine Prehospital Care Rotation

Background. Emergency medical services (EMS) is an important component of emergency medicine residency curricula. For over 20 years, residents at a university-affiliated program have staffed a physician response vehicle and responded to selected calls in an urban EMS system with online faculty backup. Objectives. To describe the prehospital educational experience and patient care provided through this unique program and to assess residents’ perceptions. Methods. This was a three-year retrospective study of patient care records for all prehospital resident responses. Information obtained included complaint, disposition, procedures performed, and medications administered. The number of EMS radio consultations provided by residents during this rotation was also sought. We surveyed 43 current and recently graduated residents to assess their perceptions of this experience. Results. Residents treated 1,434 patients during 1,381 scene responses (16.7 field patient contacts per resident-year). Complaints included cardiac arrest (788, 55.0%) and neurologic (230, 16.0%), traumatic (194, 13.5%), respiratory (144, 10.0%), and other cardiac (40, 2.8%) emergencies. Most patients (1,022; 71.3%) were transported to the hospital, including 82 of 143 patients (57.3%) who initially refused EMS transport. Residents performed procedures on 546 responses (39.5%), including 123 successful intubations, 115 central lines, 43 peripheral (IV) lines, and 10 intraosseous lines. EMS radio consultation records were available for only the second half of the study period. Residents provided 11,583 consultations during this one-and-a-half-year period (264 radio consultations per resident-year). Of the 40 returned surveys (93.0%), autonomy (n = 21), medical decision making (n = 10), and management of high-acuity patients (n = 7) were the most important perceived benefits of this program. Conclusion. Our prehospital training program incorporates emergency medicine residents as in-field physicians and allows hands-on opportunity to provide patient care for a variety of conditions in the EMS environment, as well as extensive experience in online medical direction. The trainees believed it had a strong positive impact on their acquisition of important emergency medicine abilities.

Initial cardiac rhythm correlated to emergency department survival.

This study attempted to correlate the initial cardiac rhythm and survival from prehospital cardiac arrest, as a secondary end-point. Prospective, randomized, double-blinded clinical intervention trial where bicarbonate was administered to 874 prehospital cardiopulmonary arrest patients in prehospital urban, suburban, and rural emergency medical service environments. This group's manifested an overall survival rate of 13.9% (110 of 793) of prehospital cardiac arrest patients. The most common presenting arrhythmia was ventricular fibrillation (VF) (45.0%), asystole (ASY) (34.4%), and pulseless electrical activity (PEA) (15.7%). Less commonly found were normal sinus rhythm (NSR) (1.8%), other (1.8%), ventricular tachycardia (VT) (0.6%), and atrioventricular block (AVB) (0.5%) as prearrest rhythms. The best survival was noted in those with a presenting rhythm of AVB (57.1%), VT (33.3%), VF (15.7%), NSR (14.3%), PEA (11.2%), and ASY (11.1%) (p = 0.02). However, there was no correlation between the final cardiac rhythm and outcome, other than an obvious end-of-life rhythm. The most common presenting arrhythmia was VF (45%), while survival is greatest in those presenting with AVB (57.1%).