A fall in isolation: reflection on a complex case

This case review focuses on a male patient who had fallen and was found to be profoundly hypothermic, with an altered level of consciousness and evidence of seizure activity. With multiple time-critical features, this clinical presentation was made particularly challenging by the presence of several human factors. A reflective model that considered these human factors in the context of the COVID-19 pandemic, when this incident occurred, was employed. Reflecting on this incident revealed how some subconscious (intuitive) thinking led to a degree of unconscious bias compounded by availability heuristics and human factors present. This meant that the author encountered difficulty when trying to obtain peripheral vascular access and, although several alternative interventions were identified, the majority of these were unavailable at the time and some would require a change to standard clinical practice for many paramedics. The only intervention that could have been used earlier in the management of this patient was rectal diazepam, but the need for this was removed by the patient's seizure activity self-terminating. Given the increasing prevalence of falls, social isolation, mental health problems, alcohol and substance misuse, especially in the pandemic, this type of case was unlikely to be an isolated event, strengthening the argument that the range of clinical interventions available to paramedics should be increased.

A Qualitative Analysis of Emergency Medical Services (EMS) Personnel Experiences and Perceptions Responding to Drug Overdoses in the United States (US) During the COVID-19 Pandemic

Background: The purpose of this work was to describe the experiences of EMS personnel in responding to drug overdose-related calls and the impact the pandemic has had to help better inform current response and treatment efforts. Methods: Semi-structured interviews were conducted with 99 EMS personnel across 18 areas throughout the United States that were designated as Early Warning Network sentinel sites by the National Institute on Drug Abuse-funded National Drug Early Warning System. Participants were asked about topics including the potential burdens from the pandemic and the opioid crisis. We coded the interview responses and identified themes through qualitative analysis. Multiple cycles of descriptive coding, recoding, subcoding, pattern-coding, and thematic coding of responses were conducted. Results: Responses were categorized into the following themes: 1) being over-worked from increased call volume;2) increased risk for personal harm when responding to patients;3) compassion fatigue due to long hours and repeat calls for the same people;4) conflicting perceptions of the utility of naloxone;5) the need for better treatment options to respond to opioid crisis on top of COVID-19. Conclusions: The burden of the substance use disorder (SUD) crisis on EMS personnel has been compounded by the COVID-19 pandemic. These reports from EMS personnel throughout the US can help inform policy and procedures to better protect the mental health of EMS personnel and to ensure better care for patients with SUD. These experiences and recommendations may be of use for other countries as substance use and COVID-19 are global health issues. © 2023 The Authors. Published by College of Public Health Sciences, Chulalongkorn University. This is an open access article under the CC BY license.

Evaluation of post-drowning rescue missions in the pre-hospital emergency of Mazandaran during 5 Years...The Fifth National Conference on Drowning Prevention, 27-28 July 2022, Guilan Road Trauma Research Center, Rasht, Guilan, Iran

Background: Every year, many people die due to drowning and its complications as a severe health problem in Northern provinces. The first step in planning health problems in any society is to prioritize problems based on epidemiological trends. This is an epidemiological study on drowning missions performed by Mazandaran Emergency Medical Services for 5 years. Methods: This retrospective cross-sectional study was conducted on mission forms of all drowning victims in Mazandaran pre-hospital emergency from the beginning of 2017 to August 1400. The data of age, gender, drowning place, mission result (dispatch, mission cancellation, outpatient treatment, and death), and accident time and date were collected and analyzed using SPSS Software (Version 19) and the chi-square test. Results: Out of the 1127 rescued drowning cases, most incidents occurred between 10:00 AM and 12:00 PM and between 5:00 PM and 8:00 PM. A total of 720 cases (63.9%) were men and the remaining 407 cases (36.1%) were women. In addition, 506 (44.9%) cases were dispatched, 167 (14.8%) died, 341 (30.3%) were treated on-site, and the remaining 10% of missions were canceled. Most cases of drowning were in the age group of 20-30 years old. The most common place of drowning was in the unpatrolled area of the beach with 891 cases (79%). Following the COVID-19 spread and lockdown in 2020-2021, the drowning cases in the river and water channels increased so that 9 cases in 2017 reached 101 cases in August 2021. Conclusion: Most of the drowning cases occurred in unpatrolled areas among the young and productive age group of society. Development and maintenance of protected swimming beaches, as well as public education on first aid for drowning victims, seem necessary. Further, public warning and relief systems should be strengthened to make people aware of the dangers of swimming in unpatrolled and unsafe areas.

Factors Associated with Willingness to Call Emergency Medical Services for Worsening Symptoms of COVID-19 in Addis Ababa, Ethiopia.

Background: In response to the COVID-19 pandemic, the Ethiopian Ministry of Health has established ambulances and dispatch centers specifically designed to transport COVID-19 patients to city medical centers. Due to a lack of evidence in this area, it is critical to assess the factors that influence the willingness to call for emergency medical services. Methods: A community-based cross-sectional study was conducted from June to July 2021 in Addis Ababa. The data were gathered through use of a pretested questionnaire and analyzed using SPSS 25. Logistic regression was used to calculate odds ratios with and without confounding variable controls, and significant associations were declared at (0.05). For the variables that show significant associations in bivariate and multivariate analyses, a 95% confidence interval is provided. Results: Three-quarters of those surveyed said they would call ambulance if they experienced worsening COVID-19 symptoms. The individual's language was associated with the willingness to call EMS for worsening COVID-19 symptoms [AOR 0.51(95% CI: 0.28-0.92)].; awareness of the availability of toll-free ambulance services [AOR 3.4(95% CI: 1.92-5.95)]; recalling an EMS number [AOR 4.3(95% CI: 1.71-10.67)]; ambulance crew quality of care perception [AOR 3.6(95% CI: 2.09-6.10)]; ambulance service adequacy and accessibility perception [AOR 0.25(95% CI: 0.11-0.55)]. Conclusion: The study showed significant portion of the Addis Ababa community recognized the need to call EMS due to worsening COVID-19 symptoms. The individual's language, awareness of toll-free ambulance; ability to recall an ambulance number, perception of the ambulance crew's quality of care and adequacy and accessibility of service in the city influence the decision to call an ambulance. The finding highlights the significance of addressing problems through various media outlet, for advocacy and public awareness. More research, including qualitative studies, is needed to investigate the factors that encourage people to seek EMS.

Ten Years of the Nepal Ambulance Service: Successful and Sustainable Efforts.

We describe the evolution of the nonprofit Nepal Ambulance Service (NAS) in a narrative of its 10-y history, presenting geographical, social, cultural, and financial considerations that permeated the development of NAS. We gathered narrative information from the NAS leadership and partners to detail key organizational considerations regarding the implementation and maintenance of the prehospital system in Nepal. We describe the response of NAS to the 2015 earthquake and summarize transport data for 6 mo before and 6 mo after the event. The data collected included the date and time of calls received, time to ambulance dispatch, on-scene time, time to arrival at the hospital, time until the ambulance crew was back in service, patient age and sex, chief complaints, and work shift time of the ambulance crew. To characterize the time to response and transport after the 2015 earthquake, we present the means and standard deviations of the time intervals. There was an overall increase in calls and, specifically, trauma-related calls after the 2015 earthquake. The time from a call placed to dispatch was stable, approximately 2 min, throughout the period, whereas the time from dispatch to the scene and arrival at the scene varied widely. We discuss the response to coronavirus disease 2019 (COVID-19). The NAS provided care to 1230 patients with COVID-19. The descriptive data show how well NAS responded to a major national disaster and the recent pandemic.

Prehospital care of cardiac arrest in COVID-19 patients

During the COVID-19 pandemic, there was an urgent need to revise the existing cardiopulmonary resuscitation (CPR) guidelines published in 2015. The coronavirus pandemic increased the rate of cardiac arrests, and the need for CPR. International resuscitation associations proposed updated resuscitation guidelines during the COVID-19 pandemic. Although there is a clear consensus in most recommendations, there are also disparities. Their implementation in everyday clinical practice would alleviate the fear of health workers at the prehospital level and reduce the indecision to apply CPR in such patients as well. © 2022, Serbia Medical Society. All rights reserved.

Racial/ethnic and gender disparities of the impact of the COVID-19 pandemic in out-of-hospital cardiac arrest (OHCA) in Texas.

INTRODUCTION: Prior research shows a greater disease burden, lower BCPR rates, and worse outcomes in Black and Hispanic patients after OHCA. Female OHCA patients have lower rates of BCPR compared to men and other survival outcomes vary. The influence of the COVID-19 pandemic on OHCA incidence and outcomes in different health disparity populations is unknown. METHODS: We used data from the Texas Cardiac Arrest Registry to Enhance Survival (CARES). We determined the association of both prehospital characteristics and survival outcomes with the pandemic period in each study group through Pearson's χ2 test or Fisher's exact tests. We created mixed multivariable logistic regression models to compare odds of cardiac arrest care and outcomes between 2019 and 2020 for the study groups. RESULTS: Black OHCA patients (aOR = 0.73; 95% CI: 0.65 - 0.82) had significantly lower odds of BCPR compared to White OHCA patients, were less likely to achieve ROSC (aOR = 0.86; 95% CI: 0.74 - 0.99) or have a good CPC score (aOR = 0.47; 95% CI: 0.29 - 0.75). Compared to White patients with OHCA, Hispanic persons were less likely to have a field TOR (aOR = 0.86; 95% CI: 0.75 - 0.99) or receive BCPR (aOR = 0.78; 95% CI: 0.69 - 0.87). Female OHCA patients had higher odds of surviving to hospital admission compared to males (aOR = 1.29; 95% CI: 1.15 - 1.44). CONCLUSION: Many OHCA outcomes worsened for Black and Hispanic patients. While some aspects of care worsened for women, their odds of survival improved compared to males.

Community emergency medicine throughout the UK and Ireland: a comparison of current national activity.

BACKGROUND: Community emergency medicine (CEM) aims to bring highly skilled, expert medical care to the patient outside of the traditional ED setting. Currently, there are several different CEM models in existence within the UK and Ireland which confer multiple benefits including provision of a senior clinical decision-maker early in the patient's journey, frontloading of time-critical interventions, easing pressure on busy EDs and reducing inpatient bed days. This is achieved through increased community-based management supplemented by utilisation of alternative care pathways. This study aimed to undertake a national comparison of CEM services currently in operation. METHOD: A data collection tool was distributed to CEM services by the Pre-Hospital trainee Operated Research Network in October 2020 which aimed to establish current practice among services in the UK and Ireland. It focused on six key sections: service aims; staffing and training; job tasking and patient selection; funding and vehicles used; equipment and medication; data collection, governance and research activity. RESULTS: Seven services responded from across England, Wales and Ireland. Similarities were found with the aims of each service, staffing structures and operational times. There were large differences in equipment carried, categories of patient targeted and with governance and research activity. CONCLUSION: While some national variations in services are explained by funding and geographical location, this review process revealed several differences in practice under the umbrella term of CEM. A national definition of CEM and its aim, with guidance on scope of practice and measurable outcomes, should be generated to ensure high standard and cost-effective emergency care is delivered in the community.

Patients' lived experiences of breathlessness prior to prehospital care - A phenomenological study.

AIMS AND OBJECTIVES: The study aimed to describe how breathlessness is experienced by patients prior to prehospital care. DESIGN: A qualitative phenomenological design. METHODS: Lifeworld interviews were conducted with 14 participants. The analysis was carried out within the descriptive phenomenological framework. RESULTS: The essential meaning of the breathlessness phenomenon is described as an existential fear in terms of losing control over one's body and dying, which involves a battle to try to regain control. This is further described by four constituents: being in an unknown body, striving to handle the situation, the ambiguity of having loved ones close and reaching the utmost border. CONCLUSIONS: Patients describe a battling for survival. It is at the extreme limit of endurance that patients finally choose to call the emergency number. It is a challenge for the ambulance clinician (AC) to support these patients in the most optimal fashion.

The impact of COVID-19 on social support perception and stress of prehospital care providers.

BACKGROUND: This study seeks to explore the impact of COVID-19 outbreak on the social support perception and acute stress disorder of prehospital care providers (PCPs) in the province of Denizli. METHODS: This descriptive and cross-sectional study was conducted between December 25, 2020 and January 25, 2021. Out of 510 ambulatory care staff constituting the study population, there were 287 PCPs (%56.2), including 13 physicians, 89 paramedics, 134 emergency medical technicians, and 51 individuals from other occupational groups (nurse, driver, cleaning staff, medical secretary) based at emergency health services. The data collection tools employed in the study include an introductory information form, Multidimensional Scale of Perceived Social Support (MSPSS), and National Stressful Events Survey Acute Stress Disorder Short Scale (NSESSS), which was organized as an online questionnaire. RESULTS: We analyzed the data from 287 PCPs that completed the form and scales. The mean score of the NSESSS was calculated as 1.53 ± 0.79. The PCPs who experienced health problems (1.85 ± 0.69), suffered from mental problems and received psychotherapy and medication (2.57 ± 0.57), encountered COVID-19 patients (1.58 ± 0.8), provided care for COVID-19 patients (1.59 ± 0.79), and took polymerase chain reaction (PCR) tests (1.68 ± 0.78) had higher acute stress symptom levels. The total mean score of MSPSS was calculated as 66.28 ± 17.22. Total MSPSS scores of the participants varied significantly in terms of age, marital status, taking a COVID-19 test, suffering from mental problems, status of encountering a COVID-19 patient, and workplace satisfaction (p < 0.05). CONCLUSIONS: The findings are suggestive of high perceptions of multidimensional social support and low acute stress symptom levels of the PCPs during the COVID-19 pandemic period.

The impact of COVID-19 on incidence and outcomes from out-of-hospital cardiac arrest (OHCA) in Texas.

INTRODUCTION: Emerging research demonstrates lower rates of bystander cardiopulmonary resuscitation (BCPR), public AED (PAD), worse outcomes, and higher incidence of OHCA during the COVID-19 pandemic. We aim to characterize the incidence of OHCA during the early pandemic period and the subsequent long-term period while describing changes in OHCA outcomes and survival. METHODS: We analyzed adult OHCAs in Texas from the Cardiac Arrest Registry to Enhance Survival (CARES) during March 11-December 31 of 2019 and 2020. We stratified cases into pre-COVID-19 and COVID-19 periods. Our prehospital outcomes were bystander cardiopulmonary resuscitation (BCPR), public AED use (PAD), sustained ROSC, and prehospital termination of resuscitation (TOR). Our hospital survival outcomes were survival to hospital admission, survival to hospital discharge, good neurological outcomes (CPC Score of 1 or 2) and Utstein bystander survival. We created a mixed effects logistic regression model analyzing the association between the pandemic on outcomes, using EMS agency as the random intercept. RESULTS: There were 3619 OHCAs (45.0% of overall study population) in 2019 compared to 4418 (55.0% of overall study population) in 2020. Rates of BCPR (46.2% in 2019 to 42.2% in 2020, P < 0.01) and PAD (13.0% to 7.3%, p < 0.01) decreased. Patient survival to hospital admission decreased from 27.2% in 2019 to 21.0% in 2020 (p < 0.01) and survival to hospital discharge decreased from 10.0% in 2019 to 7.4% in 2020 (p < 0.01). OHCA patients were less likely to receive PAD (aOR = 0.5, 95% CI [0.4, 0.8]) and the odds of field termination increased (aOR = 1.5, 95% CI [1.4, 1.7]). CONCLUSIONS: Our study adds state-wide evidence to the national phenomenon of long-term increased OHCA incidence during COVID-19, worsening rates of BCPR, PAD use and survival outcomes.

Accuracy of telephone triage for predicting adverse outcomes in suspected COVID-19: an observational cohort study.

OBJECTIVE: To assess accuracy of telephone triage in identifying need for emergency care among those with suspected COVID-19 infection and identify factors which affect triage accuracy. DESIGN: Observational cohort study. SETTING: Community telephone triage provided in the UK by Yorkshire Ambulance Service NHS Trust (YAS). PARTICIPANTS: 40 261 adults who contacted National Health Service (NHS) 111 telephone triage services provided by YAS between 18 March 2020 and 29 June 2020 with symptoms indicating COVID-19 infection were linked to Office for National Statistics death registrations and healthcare data collected by NHS Digital. OUTCOME: Accuracy of triage disposition was assessed in terms of death or need for organ support up to 30 days from first contact. RESULTS: Callers had a 3% (1200/40 261) risk of serious adverse outcomes (death or organ support). Telephone triage recommended self-care or non-urgent assessment for 60% (24 335/40 261), with a 1.3% (310/24 335) risk of adverse outcomes. Telephone triage had 74.2% sensitivity (95% CI: 71.6 to 76.6%) and 61.5% specificity (95% CI: 61% to 62%) for the primary outcome. Multivariable analysis suggested respiratory comorbidities may be overappreciated, and diabetes underappreciated as predictors of deterioration. Repeat contact with triage service appears to be an important under-recognised predictor of deterioration with 2 contacts (OR 1.77, 95% CI: 1.14 to 2.75) and 3 or more contacts (OR 4.02, 95% CI: 1.68 to 9.65) associated with false negative triage. CONCLUSION: Patients advised to self-care or receive non-urgent clinical assessment had a small but non-negligible risk of serious clinical deterioration. Repeat contact with telephone services needs recognition as an important predictor of subsequent adverse outcomes.

Offering mailed nicotine replacement therapy and Quitline support before elective surgery: a randomised controlled trial.

OBJECTIVE: To assess whether offering free mailed nicotine replacement therapy (NRT) and telephone counselling to smokers on elective surgery waiting lists increases quitting before surgery. DESIGN, SETTING: Randomised, controlled trial at Frankston Hospital, a public tertiary referral hospital in Melbourne. PARTICIPANTS: Adult smokers added to elective surgery waiting lists for operations at least ten days in the future, 1 April 2019 - 3 April 2020. INTERVENTION: In addition to normal care, intervention participants received a brochure on the risks of low frequency smoking, an offer of Quitline call-back registration, and an offer of mailed NRT according to reported daily smoking: 1-9 cigarettes/day, 2 mg lozenges; 10-15/day, 7-14 mg patches [three weeks] and 2 mg lozenges; > 15/day, 7-21 mg patches [five weeks] and 2 mg lozenges. MAIN OUTCOME MEASURES: Primary outcome: quitting at least 24 hours before surgery, verified by exhaled carbon monoxide testing. SECONDARY OUTCOMES: quitting at least four weeks before surgery, adverse events, and (for those who had quit before surgery) abstinence three months after surgery. RESULTS: Of 748 eligible participants (control, 363; intervention, 385), 516 (69%) had undergone elective surgery when the trial was terminated early (for COVID-19-related reasons) (intervention group, 274; control group, 242). 122 of the 385 intervention participants (32%) had accepted the offer of cessation support. The proportions of intervention participants who quit at least 24 hours before surgery (18% v 9%; odds ratio [OR], 1.97; 95% CI, 1.22-3.15) or at least four weeks before surgery (9% v 4%; OR, 2.20; 95% CI, 1.08-4.50) were larger than for the control group. Three months after surgery, 27 of 58 intervention (47%) and 12 of 25 control participants (48%) who quit before surgery reported not smoking in the preceding seven days. No major adverse events were reported. CONCLUSION: Uptake of free mailed NRT and Quitline support by smokers on elective surgery waiting lists was good, and offering additional support was associated with higher proportions of smokers quitting before surgery. TRIAL REGISTRATION: Australian New Zealand Clinical Trials Registry, ACTRN12619000032156 (prospective).

Effect of the First Wave of the Belgian COVID-19 Pandemic on Physician-Provided Prehospital Critical Care in the City of Antwerp (Belgium).

INTRODUCTION: There is evidence to suggest that patients delayed seeking urgent medical care during the first wave of the coronavirus disease 2019 (COVID-19) pandemic. A delay in health-seeking behavior could increase the disease severity of patients in the prehospital setting. The combination of COVID-19-related missions and augmented disease severity in the prehospital environment could result in an increase in the number and severity of physician-staffed prehospital interventions, potentially putting a strain on this highly specialized service. STUDY OBJECTIVE: The aim was to investigate if the COVID-19 pandemic influences the frequency of physician-staffed prehospital interventions, prehospital mortality, illness severity during prehospital interventions, and the distribution in the prehospital diagnoses. METHODS: A retrospective, multicenter cohort study was conducted on prehospital charts from March 14, 2020 through April 30, 2020, compared to the same period in 2019, in an urban area. Recorded data included demographics, prehospital diagnosis, physiological parameters, mortality, and COVID-status. A modified National Health Service (NHS) National Early Warning Score (NEWS) was calculated for each intervention to assess for disease severity. Data were analyzed with univariate and descriptive statistics. RESULTS: There was a 31% decrease in physician-staffed prehospital interventions during the period under investigation in 2020 as compared to 2019 (2019: 644 missions and 2020: 446 missions), with an increase in prehospital mortality (OR = 0.646; 95% CI, 0.435 - 0.959). During the study period, there was a marked decrease in the low and medium NEWS groups, respectively, with an OR of 1.366 (95% CI, 1.036 - 1.802) and 1.376 (0.987 - 1.920). A small increase was seen in the high NEWS group, with an OR of 0.804 (95% CI, 0.566 - 1.140); 2019: 80 (13.67%) and 2020: 69 (16.46%). With an overall decrease in cases in all diagnostic categories, a significant increase was observed for respiratory illness (31%; P = .004) and cardiac arrest (54%; P < .001), combined with a significant decrease for intoxications (-58%; P = .007). Due to the national test strategy at that time, a COVID-19 polymerase chain reaction (PCR) result was available in only 125 (30%) patients, of which 20 (16%) were positive. CONCLUSION: The frequency of physician-staffed prehospital interventions decreased significantly. There was a marked reduction in interventions for lower illness severity and an increase in higher illness severity and mortality. Further investigation is needed to fully understand the reasons for these changes.

Comparison of deliberate self-harm incidents attended by Helicopter Emergency Medical Services before and during the first wave of COVID-19 in the East of England.

INTRODUCTION: There is significant interest in the mental health impact of the COVID-19 pandemic. Helicopter Emergency Medical Services (HEMS) attend the most seriously unwell and injured patients in the community; their data therefore present an early opportunity to examine self-harm trends. The primary aim was to compare the incidence of deliberate self-harm incident (DSH-I) encounters by HEMS before and during the first wave of COVID-19. METHODS: Data were obtained from all three East of England HEMS: total number of activations and stand-downs, number of DSH-I activations and stand-downs, self-harm mechanism and number of 'severe' DSH-I patient encounters, in two 61-day periods: 1 March to 30 April in 2019 (control) and 2020 (COVID-19). Severe DSH-I was defined as cardiac arrest and/or died prehospital. Proportions were compared with a Fisher's exact test. RESULTS: There were a total of 1725 HEMS activations: n=981 (control) and n=744 (COVID-19), a decrease of 24.2% during COVID-19. DSH-I patient encounters increased by 65.4%: n=26 (control) and n=43 (COVID-19). The proportion of encounters that were DSH-I and severe DSH-I both significantly increased during COVID-19: p=0.002 and p=0.001, respectively. The absolute number of hangings and falls from height both approximately tripled during COVID-19, whereas the number of other mechanisms remained almost constant. CONCLUSION: Despite a reduction in overall HEMS patient encounters, there were significant increases in both the proportion of DSH-Is and their severity attended by HEMS during the first wave of the COVID-19 pandemic in the East of England.

Impact of the COVID-19 pandemic on emergency medical service response to out-of-hospital cardiac arrests in Taiwan: a retrospective observational study.

BACKGROUND: Emergency medical service (EMS) personnel have high COVID-19 risk during resuscitation. The resuscitation protocol for patients with out-of-hospital cardiac arrest (OHCA) was modified in response to the COVID-19 pandemic. However, how the adjustments in the EMS system affected patients with OHCA remains unclear. METHODS: We analysed data from the Taichung OHCA registry system. We compared OHCA outcomes and rescue records for 622 cases during the COVID-19 outbreak period (1 February to 30 April 2020) with those recorded for 570 cases during the same period in 2019. RESULTS: The two periods did not differ significantly with respect to patient age, patient sex, the presence of witnesses or OHCA location. Bystander cardiopulmonary resuscitation and defibrillation with automated external defibrillators were more common in 2020 (52.81% vs 65.76%, p<0.001%, and 23.51% vs 31.67%, p=0.001, respectively). The EMS response time was longer during the COVID-19 pandemic (445.8±210.2 s in 2020 vs 389.7±201.8 s in 2019, p<0.001). The rate of prehospital return of spontaneous circulation was lower in 2020 (6.49% vs 2.57%, p=0.001); 2019 and 2020 had similar rates of survival discharge (5.96% vs 4.98%). However, significantly fewer cases had favourable neurological function in 2020 (4.21% vs 2.09%, p=0.035). CONCLUSION: EMS response time for patients with OHCA was prolonged during the COVID-19 pandemic. Early advanced life support by EMS personnel remains crucial for patients with OHCA.

Airborne infection risk during open-air cardiopulmonary resuscitation.

AIM: Cardiopulmonary resuscitation (CPR) is an emergency procedure where interpersonal distance cannot be maintained. There are and will always be outbreaks of infection from airborne diseases. Our objective was to assess the potential risk of airborne virus transmission during CPR in open-air conditions. METHODS: We performed advanced high-fidelity three-dimensional modelling and simulations to predict airborne transmission during out-of-hospital hands-only CPR. The computational model considers complex fluid dynamics and heat transfer phenomena such as aerosol evaporation, breakup, coalescence, turbulence, and local interactions between the aerosol and the surrounding fluid. Furthermore, we incorporated the effects of the wind speed/direction, the air temperature and relative humidity on the transport of contaminated saliva particles emitted from a victim during a resuscitation process based on an Airborne Infection Risk (AIR) Index. RESULTS: The results reveal low-risk conditions that include wind direction and high relative humidity and temperature. High-risk situations include wind directed to the rescuer, low humidity and temperature. Combinations of other conditions have an intermediate AIR Index and risk for the rescue team. CONCLUSIONS: The fluid dynamics, simulation-based AIR Index provides a classification of the risk of contagion by victim's aerosol in the case of hands-only CPR considering environmental factors such as wind speed and direction, relative humidity and temperature. Therefore, we recommend that rescuers perform a quick assessment of their airborne infectious risk before starting CPR in the open air and positioning themselves to avoid wind directed to their faces.

Pioneering Remotely Piloted Aerial Systems (Drone) Delivery of a Remotely Telementored Ultrasound Capability for Self Diagnosis and Assessment of Vulnerable Populations-the Sky Is the Limit.

Remotely Piloted Aerial Systems (RPAS) are poised to revolutionize healthcare in out-of-hospital settings, either from necessity or practicality, especially for remote locations. RPAS have been successfully used for surveillance, search and rescue, delivery, and equipping drones with telemedical capabilities being considered. However, we know of no previous consideration of RPAS-delivered tele-ultrasound capabilities. Of all imaging technologies, ultrasound is the most portable and capable of providing real-time point-of-care information regarding anatomy, physiology, and procedural guidance. Moreover, remotely guided ultrasound including self-performed has been a backbone of medical care on the International Space Station since construction. The TeleMentored Ultrasound Supported Medical Interventions Group of the University of Calgary partnered with the Southern Alberta Institute of Technology to demonstrate RPAS delivery of a smartphone-supported tele-ultrasound system by the SwissDrones SDO50 RPAS. Upon receipt of the sanitized probe, a completely ultrasound-naïve volunteer was guided by a remote expert located 100 km away using online video conferencing (Zoom), to conduct a self-performed lung ultrasound examination. It proved feasible for the volunteer to examine their anterior chest, sides, and lower back bilaterally, correlating with standard recommended examinations in trauma/critical care, including the critical locations of a detailed COVID-19 lung diagnosis/surveillance examination. We contend that drone-delivered telemedicine including a tele-ultrasound capability could be leveraged to enhance point-of-care diagnostic accuracy in catastrophic emergencies, and allow diagnostic capabilities to be delivered to vulnerable populations in remote locations for whom transport is impractical or undesirable, speeding response times, or obviating the risk of disease transmission depending on the circumstances.