Editor’s Corner
Population Research: Convenience Sampling Strategies
- Samuel J. Stratton
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- Published online by Cambridge University Press:
- 21 July 2021, pp. 373-374
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The Impact of Personal Protection Equipment on Intubation Times
- Donald Doukas, Bonnie Arquilla, Pinchas Halpern, Mark Silverberg, Richard Sinert
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- Published online by Cambridge University Press:
- 27 May 2021, pp. 375-379
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Introduction:
Hazardous material (HAZMAT) protocols require health care providers to wear personal protective equipment (PPE) when caring for contaminated patients. Multiple levels of PPE exist (level D - level A), providing progressively more protection. Emergent endotracheal intubation (ETI) of victims can become complicated by the cumbersome nature of PPE.
Study Objective:The null hypothesis was tested that there would be no difference in time to successful ETI between providers in different types of PPE.
Methods:This randomized controlled trial assessed time to ETI with differing levels of PPE. Participants included 18 senior US Emergency Medicine (EM) residents and attendings, and nine US senior Anesthesiology residents. Each individual performed ETI on a mannequin (Laerdal SimMan Essential; Stavanger, Sweden) wearing the following levels of PPE: universal precautions (UP) controls (nitrile gloves and facemask with shield); partial level C (PC; rubber gloves and a passive air-purifying respirator [APR]); and complete level C (CC; passive APR with an anti-chemical suit). Primary outcome measures were the time in seconds (s) to successful intubation: Time 1 (T1) = inflation of the endotracheal tube (ETT) balloon; Time 2 (T2) = first ventilation. Data were reported as medians with Interquartile Ranges (IQR, 25%-75%) or percentages with 95% Confidence Intervals (95%, CI). Group comparisons were analyzed by Fisher’s Exact Test or Kruskal-Wallis, as appropriate (alpha = 0.017 [three groups], two-tails). Sample size analysis was based upon the power of 80% to detect a difference of 10 seconds between groups at a P = .017; 27 subjects per group would be needed.
Results:All 27 participants completed the study. At T1, there was no statistically significant difference (P = .27) among UP 18.0s (11.5s-19.0s), PC 21.0s (14.0s-23.5s), or CC 17.0s (13.5s-27.5s). For T2, there was also no significant (P = .25) differences among UP 24.0s (17.5s-27.0s), PC 26.0s (21.0s-32.0s), or CC 24.0s (19.5s-33.5s).
Conclusion:There were no statistically significant differences in time to balloon inflation or ventilation. Higher levels of PPE do not appear to increase time to ETI.
A Decade of Terrorism in the United States and the Emergence of Counter-Terrorism Medicine
- Derrick Tin, Alexander Hart, Gregory R. Ciottone
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- Published online by Cambridge University Press:
- 17 June 2021, pp. 380-384
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Background:
The United States (US) is ranked 22nd on the Global Terrorism Index (2019), a scoring system of terrorist activities. While the global number of deaths from terrorism over the past five years is down, the number of countries affected by terrorism is growing and the health care repercussions remain significant. Counter-Terrorism Medicine (CTM) is rapidly emerging as a necessary sub-specialty, and this study aims to provide the epidemiological context over the past decade supporting this need by detailing the unique injury types responders are likely to encounter and setting the stage for the development of training programs utilizing these data.
Methods:The Global Terrorism Database (GTD) was searched for all attacks in the US from 2008-2018. Attacks met inclusion criteria if they fulfilled the three terrorism-related criteria as set by the GTD. Ambiguous events were excluded when there was uncertainty as to whether the incident met all of the criteria for inclusion in the GTD. The grey literature was reviewed, and each event was cross-matched with reputable international and national newspaper sources online to confirm or add details regarding weapon type used and, whenever available, details of victim and perpetrator fatalities and injuries.
Results:In total, 304 events were recorded during the period of study. Of the 304 events, 117 (38.5%) used incendiary-only weapons, 80 (26.3%) used firearms as their sole weapon, 55 (18.1%) used explosives, bombs, or dynamite (E/B/D), 23 (7.6%) were melee-only, six (2.0%) used vehicles-only, four (1.3%) were chemicals-only, two (0.7%) used sabotage equipment, two (0.7%) were listed as “others,” and one (0.3%) used biological weapon. There was no recorded nuclear or radiological weapon use. In addition, 14 (4.6%) events used a mix of weapons.
Conclusions:In the decade from 2008 through 2018, terrorist attacks on US soil used weapons with well-understood injury-causing modalities. A total of 217 fatal injuries (FI) and 660 non-fatal injuries (NFI) were sustained as a result of these events during that period.
Incendiary weapons were the most commonly chosen methodology, followed by firearms and E/B/D attacks. Firearm events contributed to a disproportionality high fatality count while E/B/D events contributed to a disproportionally high NFI count.
Characteristics of Prehospital Heat Illness Cases During the Annual Heat Wave Period in Telangana, India
- Gayathri Devi Nadarajan, GV Ramana Rao, Keshav Reddy, Aruna Gimkala, Rani Janumpally, Yukai Ang, Cheryl Ting Zhen Woo, Theng Hong Neo, Xiang Yi Wong, Marcus Eng Hock Ong
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- Published online by Cambridge University Press:
- 09 July 2021, pp. 385-392
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Objectives:
Global warming and more intense heat wave periods impact health. Heat illness during heat waves has not been studied in the prehospital setting of a low- and middle-income country (LMIC). Early intervention in the community and in the prehospital setting can improve outcomes. Hence, this paper aims to describe the characteristics of heat illness patients utilizing the ambulance service in Telangana state, India with the aim of optimizing public prevention and first aid strategies and prehospital response to this growing problem.
Methods:This retrospective observational study reviewed patients presenting to Telangana’s prehospital emergency care system with heat illness symptoms during the heat wave period from March through June in 2018 and 2019. Descriptive analysis was done on the prehospital, dispatch, and environmental data looking at the patients’ characteristics and prehospital intervention.
Results:There were 295 cases in 2018 and 230 cases in 2019 from March-June. The overall incidence of calls with heat illness symptoms was 1.5 cases per 100,000 people. The Scheduled Tribes (ST) had the highest incidence of 4.5 per 100,000 people. Over 96% were from the white income group (below poverty line) while two percent were from the pink income group (above poverty line). From geospatial mapping of the cases, the highest incidence of calls came from the rural, tribal areas. However, the time to response in rural areas was longer than that in an urban area. Males with an average age of 47 were more likely to be affected. The three most common symptoms recorded by the first responders were vomiting (44.4%), general weakness (28.7%), and diarrhea (15.9%). The three most common medical interventions on scene were oxygen therapy (35.1%), oral rehydration salt (ORS) solution administration (26.9%), and intravenous fluid administration (27.0%), with cold sponging infrequently mentioned.
Conclusion:This descriptive study provides a snapshot of the regions and groups of people most affected by heat illness during heat waves and the heterogeneous symptom presentation and challenges with management in the prehospital setting. These data may aid planning of prehospital resources and preparation of community first responders during heat wave periods.
The Holy Month of Ramadan: Mass-Gathering Event Implications for Hospital Surge Capacity Planning in Saudi Arabia
- Yousef Almalki, Alexander Hart, Fadi Issa, Attila J. Hertelendy, Selwyn Mahon, Amalia Voskanyan, Gregory R. Ciottone
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- Published online by Cambridge University Press:
- 30 June 2021, pp. 393-398
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Objectives:
The goal of this study is to determine the impact of the Holy Month of Ramadan on emergency department (ED) and hospital resource utilization in comparison to the time of Hajj and the rest of the year, so as to better define future resource needs of hospitals responding to events of this large size and duration.
Methods:A retrospective chart review was conducted of electronic medical records, ED visits, and hospital admissions during Ramadan, Hajj, and all other months over a three-year period on the Hijra calendar (1438-1440) or Gregorian (2016-2019). Primary outcomes were the change in the number of ED visits, hospital admissions, and intensive care unit (ICU) admissions during Ramadan in comparison to during Hajj and other months. Secondary outcomes included mortality; number of surgeries by specialty; and admissions to cardiac, respiratory, orthopedic, and neurosurgery wards.
Results:During the three years, ED visits increased during Ramadan by 83.0%, 74.8%, and 40.3%, respectively, when compared to non-Hajj, non-Ramadan months. Hospital admissions rose by 21.05%, 50.96% and 48.22%. Combined ED and in-hospital mortality rose by 15.21%, 21.47%, and 1.39%. While there was a large increase in ICU admissions during Ramadan of 1440 (May 2019), this was not a trend seen in other years. Despite there only being two years of data for comparison, there was a trend towards increased admissions to all specialty wards. There was an average 46.69% increase in admissions to the general surgery ward during Ramadan months compared to other months, a 31.06% increase in admissions to the orthopedic surgery ward, and a 44.05% increase in admissions to the cardiac care unit.
Conclusions:Ramadan is associated with a significant increase in the population of Makkah (Mecca), Saudi Arabia. Despite this study only focusing on a three-year period, and some variables with only two years of data available, it demonstrates a significant increase in ED visits, hospital admissions, and mortality during Ramadan compared to non-Hajj/non-Ramadan months. During mass gatherings of this size, it would benefit local and regional hospital systems to devote increased resources to patient care, especially to the ED, to prevent morbidity and mortality.
Terrorism-Related Chemical, Biological, Radiation, and Nuclear Attacks: A Historical Global Comparison Influencing the Emergence of Counter-Terrorism Medicine
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- Derrick Tin, Fredrik Granholm, Alexander Hart, Gregory R. Ciottone
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- 30 June 2021, pp. 399-402
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Background:
Terrorist attacks are growing in complexity, increasing concerns around the use of chemical, biological, radiation, and nuclear (CBRN) agents. This has led to increasing interest in Counter-Terrorism Medicine (CTM) as a Disaster Medicine (DM) sub-specialty. This study aims to provide the epidemiology of CBRN use in terrorism, to detail specific agents used, and to develop training programs for responders.
Methods:The open-source Global Terrorism Database (GTD) was searched for all CBRN attacks from January 1, 1970 through December 31, 2018. Attacks were included if they fulfilled the terrorism-related criteria as set by the GTD’s Codebook. Ambiguous events or those meeting only partial criteria were excluded. The database does not include acts of state terrorism.
Results:There were 390 total CBRN incidents, causing 930 total fatal injuries (FI) and 14,167 total non-fatal injuries (NFI). A total of 347 chemical attacks (88.9% of total) caused 921 FI (99.0%) and 13,361 NFI (94.3%). Thirty-one biological attacks (8.0%) caused nine FI (1.0%) and 806 NFI (5.7%). Twelve radiation attacks (3.1%) caused zero FI and zero NFI. There were no nuclear attacks. The use of CBRN accounted for less than 0.3% of all terrorist attacks and is a high-risk, low-frequency attack methodology.
The Taliban was implicated in 40 of the 347 chemical events, utilizing a mixture of agents including unconfirmed chemical gases (grey literature suggests white phosphorous and chlorine), contaminating water sources with pesticides, and the use of corrosive acid. The Sarin gas attack in Tokyo contributed to 5,500 NFI. Biological attacks accounted for 8.0% of CBRN attacks. Anthrax was used or suspected in 20 of the 31 events, followed by salmonella (5), ricin (3), fecal matter (1), botulinum toxin (1), and HIV (1). Radiation attacks accounted for 3.1% of CBRN attacks. Monazite was used in 10 of the 12 events, followed by iodine 131 (1) and undetermined irradiated plates (1).
Conclusion:Currently, CBRN are low-frequency, high-impact attack modalities and remain a concern given the rising rate of terrorist events. Counter-Terrorism Medicine is a developing DM sub-specialty focusing on the mitigation of health care risks from such events. First responders and health care workers should be aware of historic use of CBRN weapons regionally and globally, and should train and prepare to respond appropriately.
Does the Presence of On-Site Medical Services at Outdoor Music Festivals Affect Attendees’ Planned Alcohol and Recreational Drug Use?
- Alison Hutton, Matthew Brendan Munn, Sydney White, Peter Kara, Jamie Ranse
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- 30 June 2021, pp. 403-407
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Background:
Dedicated on-site medical services have long been recommended to improve health outcomes at mass-gathering events (MGEs). In many countries, they are being reviewed as a mandatory requirement. While it is known that perceptions of risk shape substance use plans amongst outdoor music festival (OMF) attendees, it is unclear if attendees perceive the presence of on-site medical services as a part of the safety net. The aim of this paper is to better understand whether attendees’ perceptions of on-site medical services influence high-risk behaviors like alcohol and recreational drug use at OMFs.
Method:A questionnaire was distributed to a random sample of attendees entering and attending two separate 20,000-person OMFs; one in Canada (Festival A) and one in New Zealand (Festival B). Responses focused on demographics, planned alcohol and recreational drug use, perceptions of medical services, and whether the absence of medical services would impact attendees’ planned substance use.
Results:A total of 851 (587 and 264 attendees for Festival A and Festival B, respectively) attendees consented and participated. Gender distribution was equal and average ages were 23 to 25. At Festival A, 48% and 89% planned to use alcohol and recreational drugs, respectively, whereas at Festival B, it was 92% and 44%. A great majority were aware and supportive of the presence of medical services at both festivals, and a moderate number considered them a factor in attendance and something they would not attend without. There was significant (>10%) agreement (range 11%-46%; or 2,200-9,200 attendees for a 20,000-person festival) at both festivals that the absence of medical services would affect attendees’ planned use of alcohol and recreational drugs.
Conclusions:This study found that attendees surveyed at two geographically and musically distinct OMFs had high but differing rates of planned alcohol and recreational drug use, and that the presence of on-site medical services may impact attendees’ perceptions of substance use risk. Future research will aim to address the limitations of this study to clarify these findings and their implications.
A Pilot Study to Assess Urban, Fire-Based Paramedic Accuracy in Identification of Anatomical Landmarks Necessary for Cricothyrotomy and Needle Chest Decompression Using Live Patient Models
- Romeo R. Fairley, Sophia Ahmed, Steven G. Schauer, David A. Wampler, Kaori Tanaka, Bryan Everitt, Mark K. Sparkman, Ramon Casanova, Justin Sifuentes, Christopher J. Winckler
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- Published online by Cambridge University Press:
- 07 April 2021, pp. 408-411
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Background:
Cricothyrotomy and chest needle decompression (NDC) have a high failure and complication rate. This article sought to determine whether paramedics can correctly identify the anatomical landmarks for cricothyrotomy and chest NDC.
Methods:A prospective study using human models was performed. Paramedics were partnered and requested to identify the location for cricothyrotomy and chest NDC (both mid-clavicular and anterior axillary sites) on each other. A board-certified or board-eligible emergency medicine physician timed the process and confirmed location accuracy. All data were collected de-identified. Descriptive analysis was performed on continuous data; chi-square was used for categorical data.
Results:A total of 69 participants were recruited, with one excluded for incomplete data. The paramedics had a range of six to 38 (median 14) years of experience. There were 28 medical training officers (MTOs) and 41 field paramedics. Cricothyroidotomy location was correctly identified in 56 of 68 participants with a time to identification range of 2.0 to 38.2 (median 8.6) seconds. Chest NDC (mid-clavicular) location was correctly identified in 54 of 68 participants with a time to identification range of 3.4 to 25.0 (median 9.5) seconds. Chest NDC (anterior axillary) location was correctly identified in 43 of 68 participants with a time to identification range of 1.9 to 37.9 (median 9.6) seconds. Chi-square (2-tail) showed no difference between MTO and field paramedic in cricothyroidotomy site (P = .62), mid-clavicular chest NDC site (P = .21), or anterior axillary chest NDC site (P = .11). There was no difference in time to identification for any procedure between MTO and field paramedic.
Conclusion:Both MTOs and field paramedics were quick in identifying correct placement of cricothyroidotomy and chest NDC location sites. While time to identification was clinically acceptable, there was also a significant proportion that did not identify the correct landmarks.
Assessment of Prehospital Monitor/Defibrillators for Clostridioides difficile Contamination
- Cody Vaughn Gibson, Jonathan Edwin Swindell, George Donald Collier
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- 15 April 2021, pp. 412-413
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Objectives:
The purpose of this study was to determine if Clostridioides difficile (C. diff) was present on the electrocardiogram (ECG) right arm leads, blood pressure cuffs, and fingertip pulse oximetry sensors of monitor/defibrillators used in the prehospital setting.
Methods:On March 22, 2019, a total of 20 prehospital monitor/defibrillators located at an Emergency Medical Service (EMS) station in Alabama (USA) were assessed for C. diff. The inside area of the fingertip pulse oximetry sensor, patient contact side of the blood pressure cuff, and right arm ECG lead of monitor/defibrillators (n = 60) were swabbed using a sterile cotton-tipped applicator saturated in a 0.85% Sodium Chloride solution. These cotton-tipped applicators were then inserted, scored, and released into Banana Broth vials. The vials were then sealed tightly and immediately transported to the laboratory, where they were incubated at 36°C for 72 hours. Colorimetric change from red to yellow was considered a positive indication for the presence of C. diff.
Results:Of 20 blood pressure cuffs, 15 had C. diff contamination (75%); C. diff was also present on 19 of 20 fingertip pulse oximeter sensors (95%) and 20 of 20 ECG right arm monitor leads (100%).
Conclusion:Prehospital monitor/defibrillators may represent a significant reservoir of C. diff and other pathogenic bacteria. Improved disinfection protocols for reusable monitoring equipment and transition to disposable monitoring equipment used in the prehospital setting may reduce the risk of patient and EMS provider infection.
The Flatness Index of Inferior Vena Cava can be an Accurate Predictor for Hypovolemia in Multi-Trauma Patients
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- Nazlı Ozcan Yazlamaz, Engin Ozakin, Betül T. Bastug, Evvah Karakilic, Filiz Baloglu Kaya, Nurdan Acar, Rusengul Koruk
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- 06 May 2021, pp. 414-420
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Introduction:
Shock is the leading cause of death in multi-trauma patients and must be detected at an early stage to improve prognosis. Many parameters are used to predict clinical condition and outcome in trauma. Computed tomography (CT) signs of hypovolemic shock in trauma patients are not clear yet, requiring further research. The flatness index of inferior vena cava (IVC) is a helpful method for this purpose.
Methods:This is a prospective, cross-sectional study which included adult multi-trauma patients (>18 years) who were admitted to the emergency department (ED) and underwent a thoraco-abdominal CT from 2017 through 2018. The main objective of this study was to investigate whether the flatness index of IVC can be used to determine the hypovolemic shock at an early stage in multi-trauma patients, and to establish its relations with shock parameters. The patients’ demographic features, trauma mechanisms, vitals, laboratory values, shock parameters, and clinical outcome within 24 hours of admission were recorded.
Results:Total of 327 (229 males with an average age of 40.9 [SD = 7.93]) patients were included in the study. There was no significant difference in the flatness index of IVC within genders (P = .134) and trauma mechanisms (P = .701); however, the flatness index of IVC was significantly higher in hypotensive (systolic blood pressure [SBP] ≤90 mmHg and/or diastolic blood pressure [DBP] ≤60 mmHg; P = .015 and P = .019), tachycardic (P = .049), and hypoxic (SpO2 ≤%94; P <.001) patients. The flatness index of IVC was also higher in patients with lactate ≥ 2mmol/l (P = .043) and patients with Class III hemorrhage (P = .003). A positive correlation was determined between lactate level and the flatness index of IVC; a negative correlation was found between Glasgow Coma Scale (GCS) and Revised Trauma Score (RTS) with the flatness index of IVC (for each of them, P <.05).
Conclusion:The flatness index of IVC may be a useful method to determine the hypovolemic shock at an early stage in multi-trauma patients.
Endotracheal Tube Cuff Pressure – Comparison of the Two Filling Methods – Simulated Test
- Tomasz Ilczak, Michał Ćwiertnia, Piotr Białoń, Michał Szlagor, Beata Kudłacik, Małgorzata Rak, Szymon Bialka, Adam Ubych, Arkadiusz Stasicki, Wioletta Waksmańska, Jan Bujok, Monika Mikulska, Rafał Bobiński, Marek Kawecki
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- Published online by Cambridge University Press:
- 30 April 2021, pp. 421-425
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Introduction:
Tracheal intubation is the optimal method for opening up airways. Performed correctly, it prevents stomach contents from entering the respiratory tract and allows asynchronous cardiopulmonary resuscitation (CPR) to be conducted during sudden cardiac arrest. An important element of correct intubation is proper inflation of the endotracheal tube cuff. Research has shown that when medical personnel use the palpation technique, the cuff is usually inflated incorrectly. This can result in numerous health complications for the patient.
Methods:This research was conducted in 2020 on a group of paramedics participating in the 15th International Winter Championship of Medical Rescuers in Bielsko-Biala (Poland). The aim of the research was to assess two methods of inflating the endotracheal tube cuff. Method A involved inflating the cuff using a syringe and assessing the pressure in the control cuff using the palpation technique. Method B involved inflating the cuff using a manometer. During the inflation, both the cuff inflation pressure and the time required to complete the procedure were recorded. Analysis was also conducted on whether completion of certified Advanced Life Support (ALS) and Advanced Cardiovascular Life Support (ACLS) training had any influence on the effectiveness of the inflation procedure.
Results:The research showed that paramedics using Method B significantly more often inflated the endotracheal tube cuff to the correct pressure than those using Method A. However, when Method B was used, the procedure took longer to conduct. The study also showed that completion of certified ALS or ACLS training did not have a significant influence on proper inflation of the cuff. Those who had completed certified training courses took significantly longer to inflate the endotracheal tube cuff when using Method A.
Conclusions:Inflation of the endotracheal tube cuff by use of a syringe, followed by the palpation technique for assessing the inflation of the cuff balloon, is ineffective. Paramedic teams should be equipped with manometers to be used for inflating the endotracheal tube cuff.
A Comparison of Time to Treatment between an Emergency Department Focused Stroke Protocol and Mobile Stroke Units
- Debbie Y. Madhok, Paul H. Mangasarian, Kevin J. Keenan, J. Claude Hemphill III, John F. Brown, Anthony S. Kim
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- 11 May 2021, pp. 426-430
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Background:
San Francisco (California USA) is a relatively compact city with a population of 884,000 and nine stroke centers within a 47 square mile area. Emergency Medical Services (EMS) transport distances and times are short and there are currently no Mobile Stroke Units (MSUs).
Methods:This study evaluated EMS activation to computed tomography (CT [EMS-CT]) and EMS activation to thrombolysis (EMS-TPA) times for acute stroke in the first two years after implementation of an emergency department (ED) focused, direct EMS-to-CT protocol entitled “Mission Protocol” (MP) at a safety net hospital in San Francisco and compared performance to published reports from MSUs. The EMS times were abstracted from ambulance records. Geometric means were calculated for MP data and pooled means were similarly calculated from published MSU data.
Results:From July 2017 through June 2019, a total of 423 patients with suspected stroke were evaluated under the MP, and 166 of these patients were either ultimately diagnosed with ischemic stroke or were treated as a stroke but later diagnosed as a stroke mimic. The EMS and treatment time data were available for 134 of these patients with 61 patients (45.5%) receiving thrombolysis, with mean EMS-CT and EMS-TPA times of 41 minutes (95% CI, 39-43) and 63 minutes (95% CI, 57-70), respectively. The pooled estimates for MSUs suggested a mean EMS-CT time of 35 minutes (95% CI, 27-45) and a mean EMS-TPA time of 48 minutes (95% CI, 39-60). The MSUs achieved faster EMS-CT and EMS-TPA times (P <.0001 for each).
Conclusions:In a moderate-sized, urban setting with high population density, MP was able to achieve EMS activation to treatment times for stroke thrombolysis that were approximately 15 minutes slower than the published performance of MSUs.
Association between Mode of Transportation and Survival in Adult Trauma Patients with Blunt Injuries: Matched Cohort Study between Police and Ground Ambulance Transport
- Fouad A. Sakr, Rana H. Bachir, Mazen J. El Sayed
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- Published online by Cambridge University Press:
- 03 June 2021, pp. 431-439
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Introduction:
Early police transport (PT) of penetrating trauma patients has the potential to improve survival rates for trauma patients. There are no well-established guidelines for the transport of blunt trauma patients by PT currently.
Study Objective:This study examines the association between the survival rate of blunt trauma patients and the transport modality (police versus ground ambulance).
Methods:A retrospective, matched cohort study was conducted using the National Trauma Data Bank (NTDB). All blunt trauma patients transported by police to trauma centers were identified and matched (one-to-four) to patients transported by ground Emergency Medical Services (EMS) for analysis. Descriptive analysis was carried out. This was followed by comparing all patients’ characteristics and their survival rates in terms of the mode of transportation.
Results:Out of the 2,469 patients with blunt injuries, EMS transported 1,846 patients and police transported 623 patients. Most patients were 16-64 years of age (86.2%) with a male predominance (82.5%). Fall (38.4%) was the most common mechanism of injury with majority of injuries involving the head and neck body part (64.8%). Fractures were the most common nature of injury (62.1%). The overall survival rate of adult blunt trauma patients was similar for both methods of transportation (99.2%; P = 1.000).
Conclusion:In this study, adult blunt trauma patients transported by police had similar outcomes to those transported by EMS. As such, PT in trauma should be encouraged and protocolized to improve resource utilization and outcomes further.
The Epidemiology and Effectiveness of Synchronized Cardioversion in a UK Prehospital Setting: A Retrospective Cross-Sectional Study
- Alan Cowley, Dan Cody, Magnus Nelson
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- Published online by Cambridge University Press:
- 15 June 2021, pp. 440-444
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Background:
Synchronized cardioversion is an internationally accepted standard therapy for unstable tachyarrhythmias, but it is conventionally an in-hospital physician-led intervention. Increasingly, it is being brought forward into the prehospital setting as part of a specialist paramedic scope of practice; however, very little literature exists regarding the epidemiology or efficacy in this setting.
Methods:All patients receiving cardioversion within a United Kingdom (UK) ambulance service were identified using an electronic database. The period of inclusion was March 1, 2017 through October 31, 2020. These data were then interrogated to provide demographic, physiological, and efficacy data, and then a sub-group was created to identify those who presented with a primary arrhythmia (as opposed to post-cardiac arrest).
Results:From a total of 93 patients, prehospital synchronized cardioversion successfully terminated the tachyarrhythmia in 96% of patients presenting with a primary arrhythmia (85% in the allcomers group) with a predominance towards males (82% of patients) and an average age of 67 years. Hypotension and reduced level of consciousness were the most commonly documented unstable features (84.4% and 44.4%).
Conclusion:Cardioversion within a paramedic-led service results in efficacy rates of 96% in patients presenting with a primary tachyarrhythmia. This is a similar efficacy rate to traditional doctor-led therapies. Demographic data show that males make up over 80% of the patient population, in keeping with previously published work across the spectrum of cardiac interventions.
Disparity in Gender Representation of Speakers at National Emergency Medical Services Conferences: A Current Assessment and Proposed Path Forward
- Alexandra Davic, Erin Carey, Erin Lambert, Therese Luckingham, Nikki Mongiello, Randi Peralta, Nicolina Puccio, Kimberly Rivera, Kirsten Torre, Lauren M. Maloney
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- Published online by Cambridge University Press:
- 30 June 2021, pp. 445-449
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Introduction:
Gender disparities between Emergency Medicine physicians with regards to salary, promotion, and scholarly recognition as national conference speakers have been well-documented. However, little is known if similar gender disparities impact their out-of-hospital Emergency Medical Services (EMS) colleagues. Although there have been improvements in the ratio of women entering the EMS workforce, gender representation has improved at a slower rate for paramedics compared to emergency medical technicians (EMTs). Since recruitment, retention, and advancement of females within a specialty have been associated with the visibility of prominent, respected female leaders, gender disparity of these leaders as national conference speakers may contribute to the “leaky pipeline effect” seen within the EMS profession. Gender representation of these speakers has yet to be described objectively.
Study Objective:The primary objective of this study was to determine if disparity exists in gender representation of speakers at well-known national EMS conferences and trade shows in the United States (US) from 2016-2020. The secondary objective was to determine if males were more likely than females to return to a conference as a speaker in subsequent years.
Methods:A cross-sectional analysis of programs from well-known national conferences, specifically for EMS providers, which were held in the US from 2016-2020 was performed. Programs were abstracted for type of conference session (pre-conference, keynote, main conference) and speakers’ names. Speaker gender (male, female) was confirmed via internet search.
Results:Seventeen conference programs were obtained with 1,709 conference sessions that had a total of 2,731 listed speaker names, of whom 537 (20%) were female. A total of 30 keynote addresses had 39 listed speaker names of whom six (15%) were female. No significant difference was observed in the number of years males returned to present at the same conference as compared to females.
Conclusion:Gender representation of speakers at national EMS conferences in the US is not reflective of the current best estimate of the US EMS workforce. This disparity exists not only in the overall percent of female names listed as speakers, but also in the percent of individual female speakers, and is most pronounced within keynote speakers. Online lecture platforms, as an unintentional consequent of the COVID-19 pandemic, coupled with intentional speaker development and mentorship initiatives, may reduce barriers to facilitating a new pipeline for more females to become speakers at national EMS conferences.
Systematic Review
Prehospital Decompression of Pneumothorax: A Systematic Review of Recent Evidence
- Maxime Robitaille-Fortin, Sharon Norman, Thomas Archer, Eric Mercier
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- Published online by Cambridge University Press:
- 25 May 2021, pp. 450-459
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Introduction:
Pneumothorax remains an important cause of preventable trauma death. The aim of this systematic review is to synthesize the recent evidence on the efficacy, patient outcomes, and adverse events of different chest decompression approaches relevant to the out-of-hospital setting.
Methods:A comprehensive literature search was performed using five databases (from January 1, 2014 through June 15, 2020). To be considered eligible, studies required to report original data on decompression of suspected or proven traumatic pneumothorax and be considered relevant to the prehospital context. They also required to be conducted mostly on an adult population (expected more than ≥80% of the population ≥16 years old) of patients. Needle chest decompression (NCD), finger thoracostomy (FT), and tube thoracostomy were considered. No meta-analysis was performed. Level of evidence was assigned using the Harbour and Miller system.
Results:A total of 1,420 citations were obtained by the search strategy, of which 20 studies were included. Overall, the level of evidence was low. Eleven studies reported on the efficacy and patient outcomes following chest decompression. The most studied technique was NCD (n = 7), followed by FT (n = 5). Definitions of a successful chest decompression were heterogeneous. Subjective improvement following NCD ranged between 18% and 86% (n = 6). Successful FT was reported for between 9.7% and 32.0% of interventions following a traumatic cardiac arrest. Adverse events were infrequently reported. Nine studies presented only on anatomical measures with predicted failure and success. The mean anterior chest wall thickness (CWT) was larger than the lateral CWT in all studies except one. The predicted success rate of NCD ranged between 90% and 100% when using needle >7cm (n = 7) both for the lateral and anterior approaches. The reported risk of iatrogenic injuries was higher for the lateral approach, mostly on the left side because of the proximity with the heart.
Conclusions:Based on observational studies with a low level of evidence, prehospital NCD should be performed using a needle >7cm length with either a lateral or anterior approach. While FT is an interesting diagnostic and therapeutic approach, evidence on the success rates and complications is limited. High-quality studies are required to determine the optimal chest decompression approach applicable in the out-of-hospital setting.
Association of Ventilation during Initial Trauma Resuscitation for Traumatic Brain Injury and Post-Traumatic Outcomes: A Systematic Review
- Mary Beth Howard, Nichole McCollum, Emily C. Alberto, Hannah Kotler, Mary E. Mottla, Laura Tiusaba, Susan Keller, Ivan Marsic, Aleksandra Sarcevic, Randall S. Burd, Karen J. O’Connell
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- Published online by Cambridge University Press:
- 31 May 2021, pp. 460-465
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Objectives:
In the absence of evidence of acute cerebral herniation, normal ventilation is recommended for patients with traumatic brain injury (TBI). Despite this recommendation, ventilation strategies vary during the initial management of patients with TBI and may impact outcome. The goal of this systematic review was to define the best evidence-based practice of ventilation management during the initial resuscitation period.
Methods:A literature search of PubMed, CINAHL, and SCOPUS identified studies from 2009 through 2019 addressing the effects of ventilation during the initial post-trauma resuscitation on patient outcomes.
Results:The initial search yielded 899 articles, from which 13 were relevant and selected for full-text review. Six of the 13 articles met the inclusion criteria, all of which reported on patients with TBI. Either end-tidal carbon dioxide (ETCO2) or partial pressure carbon dioxide (PCO2) were the independent variables associated with mortality. Decreased rates of mortality were reported in patients with normal PCO2 or ETCO2.
Conclusions:Normoventilation, as measured by ETCO2 or PCO2, is associated with decreased mortality in patients with TBI. Preventing hyperventilation or hypoventilation in patients with TBI during the early resuscitation phase could improve outcome after TBI.
Special Report
EMS Safety and Prehospital Emergency Care of Animals
- Katharyn T. Kryda, Ashley Mitek, Maureen McMichael
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- Published online by Cambridge University Press:
- 13 April 2021, pp. 466-469
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Emergency Medical Services (EMS) personnel frequently encounter animals in situations ranging from injured law enforcement canines (LEK9s) to pets with smoke inhalation injury. In recent years, several US states have enacted laws that legally allow EMS personnel to provide basic emergency care to certain animals. Currently, nine states allow some type of emergency medical treatment and/or ambulance transport of animals by EMS, and five states limit liability for vehicle damage resulting from rescuing animals trapped inside. Despite this expanding body of legislation encouraging EMS to assist animals, EMS personnel are not typically trained in the safe handling or medical treatment of animals. Interaction with veterinary patients can pose serious injury and infectious disease risks to untrained EMS personnel. Furthermore, relationships with veterinarians must be built and treatment and transport protocols must be developed for EMS agencies to appropriately care for these animals. This report serves as an initial framework from the veterinary perspective for EMS consideration regarding current legislation, safety concerns, transport protocols, and common life-saving treatments in the prehospital emergency care of animals. Increased collaboration between EMS personnel and veterinary professionals provides an opportunity to develop quality training programs for EMS and to improve disaster preparedness of the whole community.
Development of a Prehospital Care Rotation for Emergency Medicine Residents in Haiti
- Sean M. Kivlehan, Lourdes Rachelle Faikha Colinet, Cassandre Edmond, Hank Song, Chen Wei, Linda Rimpel, Shada A. Rouhani, Keegan A. Checkett
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- Published online by Cambridge University Press:
- 22 April 2021, pp. 470-474
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Background:
Prehospital care is a key component of an emergency care system. Prehospital providers initiate patient care in the field and transition it to the emergency department. Emergency Medicine (EM) specialist training programs are growing rapidly in low- and middle-income countries (LMICs), and future emergency physicians will oversee emergency care systems. Despite this, no standardized prehospital care curriculum exists for physicians in these settings. This report describes the development of a prehospital rotation for an EM residency program in Central Haiti.
Methods:Using a conceptual framework, existing prehospital curricula from high-income countries (HICs) were reviewed and adapted to the Haitian context. Didactics covering prehospital care from LMICs were also reviewed and adapted. Regional stakeholders were identified and engaged in the curriculum development.
Results:A one-week long, 40-hour curriculum was developed which included didactic, clinical, evaluation, and assessment components. All senior residents completed the rotation in the first year. Feedback was positive from residents, field sites, and students.
Conclusions:A standardized prehospital rotation for EM residents in Haiti was successfully implemented and well-received. This model of adaptation and local engagement can be applied to other residency programs in low-income countries to increase physician engagement in prehospital care.
Supporting the Mental Health and Well-Being of First Responders from Career to Retirement: A Scoping Review
- Erin Smith, Greg Dean, Lisa Holmes
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- Published online by Cambridge University Press:
- 30 April 2021, pp. 475-480
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Introduction:
First responders are at greater risk of mental ill health and compromised well-being compared to the general population. It is important to identify strategies that will be effective in supporting mental health, both during and after the first responder’s career.
Methods:A scoping review was conducted using the PubMed database (1966 to October 1, 2020) and the Google Scholar database (October 1, 2020) using relevant search terms, truncation symbols, and Boolean combination functions. The reference lists of all relevant publications were also reviewed to identify further publications.
Results:A total of 172 publications were retrieved by the combined search strategies. Of these, 56 met the inclusion criteria and informed the results of this overview paper. These publications identified that strategies supporting first responder mental health and well-being need to break down stigma and build resilience. Normalizing conversations around mental health is integral for increasing help-seeking behaviors, both during a first responder’s career and in retirement. Organizations should consider the implementation of both pre-retirement and post-retirement support strategies to improve mental health and well-being.
Conclusion:Strategies for supporting mental health and well-being need to be implemented early in the first responder career and reinforced throughout and into retirement. They should utilize holistic approaches which encourage “reaching in” rather than placing an onus on first responders to “reach out” when they are in crisis.