Impact of a Novel Biplane User Interface on Ultrasound-Guided Vascular Access Performance: A Prospective, Randomized, Crossover Study.

BACKGROUND: Controversy exists regarding the optimal methods of employing ultrasound to enhance vascular access. A novel user interface which dynamically displays transverse (short) and longitudinal (long) planes simultaneously was developed to optimize ultrasound-guided vascular access. This study aimed to assess the impact of this novel biplane axis technology on central venous access performance. METHODS: Eighteen volunteer emergency medicine resident physicians and physician assistants were recruited from a single center to participate in this prospective, randomized crossover study. Following a brief instructional video, participants were randomized to perform ultrasound-guided vascular access using either short-axis or biplane axis approaches first, followed by the opposite technique following a brief washout period. Time to cannulation was the primary outcome measure. Secondary outcome measures included success rate, posterior wall and arterial puncture rates, time to scout, number of attempts, number of needle redirections, participant cannulization and visualization confidence, and interface preference. RESULTS: Short-axis imaged approach was associated with a significantly shorter time to cannulation (34.9 seconds versus 17.6, p is less than 0.001) and time to scout (30 versus 49 seconds, p is equal to 0.008) when compared to biplaneaxis imaging approach. No significant differences were noted when comparing first pass success, number of attempts, number of redirections, and posterior wall and arterial wall puncture. Participants' cannulation/visualization confidence and axis preference both favored the short-axis imaging approach. CONCLUSION: Further studies are needed to assess the clinical value of novel biplane axis ultrasound imaging in the performance of ultrasound-guided procedures.

Accuracy of Needle Thoracostomy Site Selection among US Army Medics.

BACKGROUND: Tension pneumothorax is a prominent cause of potentially survivable death on the battlefield. Field management for suspected tension pneumothorax is immediate needle thoracostomy (NT). Recent data noted higher NT success rates and ease of insertion at the fifth intercostal space, anterior axillary line (5th ICS AAL), leading to an amendment of the Committee on Tactical Combat Casualty Care recommendations on managing suspected tension pneumothorax to include the 5th ICS AAL as a viable alternative site for NT placement. The objective of this study was to assess the overall accuracy, speed, and ease of NT site selection and compare these outcomes between the second intercostal space, midclavicular line (2nd ICS MCL) and 5th ICS AAL among a cohort of Army medics. METHODS: We designed a prospective, observational, comparative study and recruited a convenience sample of US Army medics from a single military installation to localize and mark the anatomic location where they would perform an NT at the 2nd ICS MCL and 5th ICS AAL on 6 live human models. The marked site was compared for accuracy to an optimal site predetermined by investigators. We assessed the primary outcome of accuracy via concordance with the predetermined NT site location at the 2nd ICS MCL and 5th ICS MCL. Secondarily, we compared time to final site marking and the influence of model body mass index (BMI) and gender on accuracy of selection between sites. RESULTS: A total of 15 participants performed 360 NT site selections. We found a significant difference between participants' ability to accurately target the 2nd ICS MCL compared to the 5th ICS AAL (42.2% versus 10% respectively, p is less than 0.001). The overall accuracy rate among all NT site selections was 26.1%. We also found a significant difference in time-to-site identification between the 2nd ICS MCL and 5th ICS AAL in favor of the 2nd ICS MCL (median [IQR] 9 [7.8] seconds versus 12 [12] seconds, p is less than 0.001). CONCLUSIONS: US Army medics may be more accurate and faster at identifying the 2nd ICS MCL when compared to the 5th ICS AAL. However, overall site selection accuracy is unacceptably low, highlighting an opportunity to enhance training for this procedure.

Knowledge and Attitudes of Lifestyle Medicine-Based Care in a Military Community.

INTRODUCTION: The Department of Defense spends more than $3 billion annually on medical costs of lifestyle-related morbidity. Military service members and veterans engage in unhealthy behaviors at a higher rate than the civilian population. Lifestyle medicine may mitigate lifestyle-related chronic diseases and increase medical readiness in the U.S. Military. However, patients' perspectives in a military community regarding a lifestyle medicine-based approach to health care have not been studied. The purpose of this study was to assess the knowledge and attitudes of and interest in lifestyle medicine-based care within a military community. MATERIALS AND METHODS: Following exempt study determination from the Madigan Army Medical Center Human Protections Office (Reference No. 220092), a prospective, cross-sectional, mixed-methods survey study was conducted from September 2020 to January 2021. Volunteer subjects, including active duty service members, National Guard/Reserves service members, and military dependents, were recruited to complete the anonymous survey while seeking care at five military clinics on Joint Base Lewis-McChord, Washington. The study's outcome measures were the overall level of awareness of lifestyle medicine, ranked level of importance of seven core lifestyle domains, the level of interest in seeking care from a lifestyle medicine practitioner, and the preferred lifestyle medicine care delivery setting. Kruskal-Wallis analyses of variance were conducted for categorical outcome variables. Mean composite scores were calculated for lifestyle domain rankings. RESULTS: A total of 623 respondents completed the survey with a 62.3% response rate. The majority of respondents (89.7%) lacked definitive knowledge of the field of lifestyle medicine. Food/nutrition and sleep were ranked the highest of all lifestyle domains to include in a healthcare approach in the overall sample and across all subgroups. Quitting smoking and alcohol use were ranked the lowest of importance overall and across all subgroups. The majority of respondents (65.7%) reported it was extremely or very important that lifestyle is part of the healthcare discussion with their provider. Of 614 responses, 77.6% of respondents expressed interest in a lifestyle medicine-based approach to health care, with 40.1% indicating they were extremely or very interested in this approach. A direct correlation was noted between education levels and level of interest in lifestyle medicine. Many respondents selected their primary care provider (34.6%) or a lifestyle medicine practitioner embedded in their primary care clinic (26.1%) as their preferred method of lifestyle medicine provision. A higher smoking rate was demonstrated in service members in combat arms occupational specialties. CONCLUSIONS: Despite an overall low level of awareness of lifestyle medicine, most respondents expressed interest in a lifestyle medicine approach to health care, with food/nutrition and sleep ranked as the most important domains. Lower levels of education may be a potential barrier to patient willingness to engage in lifestyle medicine care. Service members in combat arms occupational specialties may represent a potential target population for smoking cessation interventions. Further research with a larger sample more proportionately inclusive of all military service branches is needed.

PAs and point-of-care ultrasound: A scoping review.

OBJECTIVE: Point-of-care ultrasound (POCUS) has rapidly emerged as a valuable tool in the bedside assessment of patients. This scoping review summarizes existing literature covering clinical use and educational integration of POCUS by physician assistants (PAs), with the overall goal of identifying gaps in POCUS research involving the PA profession. METHODS: Keyword searches of PubMed, EMBASE, Medline, and Google Scholar were conducted. Studies assessing PA POCUS use or accuracy; those evaluating extent, method, or value of POCUS educational integration; and those assessing the effect of POCUS training interventions were included. RESULTS: Of the 717 studies retrieved, 30 met inclusion criteria. Studies generally demonstrated that PAs can use a fairly wide range of POCUS applications with high accuracy, but that POCUS integration into PA programs remains limited because of a number of identified barriers. CONCLUSIONS: Machine availability and insufficient POCUS training and education opportunities limit widespread clinical use of POCUS by PAs.

Combat Medic eFAST with Novel and Conventional Portable Ultrasound Devices: A Prospective, Randomized, Crossover Trial.

BACKGROUND: Extended Focused Assessment with Ultrasonography in Trauma (eFAST) reliably identifies noncompressible torso hemorrhage (NCTH), a major cause of battlefield death. Increased portability of ultrasound enables eFAST far forward on the battlefield, and published data demonstrate combat medics can learn and reliably perform ultrasound exams. One medical company developed an ultrasound device with an intuitive graphical user interface (GUI) and novel, finger-worn transducer with built-in linear and phased arrays, referred to as the novel device. We evaluated combat medic eFAST performance between the novel and conventional device. METHODS: This was a prospective, randomized, crossover trial completed at a single US military installation. Subjects were US Army combat medics with no previous ultrasound experience. Subjects performed an eFAST on a live human and a simulation model with both devices after a brief training intervention. Our primary outcome was time in seconds for eFAST completion, limited to 600 seconds. Secondary outcomes included diagnostic accuracy, technical adequacy using a validated task-specific checklist, and end-user appraisal of device ease-of-use with 5-point Likert items. This study was approved by the local institutional review board. RESULTS: Forty subjects volunteered, most were male (67.5%), less than 36 years old (95.0%), and grade E-4 or below (75.0%). Subjects performed a total of 160 eFAST scans (80 novel, 80 conventional). We found no significant difference in time for eFAST completion between the novel and conventional devices (391 seconds [95% CI 364, 417] versus 352 seconds [95% CI 325, 379]; p = 0.71). We also found no significant differences between the novel and conventional devices with respect to diagnostic accuracy (91.5% versus 89.2%; p = 0.28) and technical adequacy (75.0% versus 72.5%; p = 0.28). However, we did find that subjects favored the image quality of the novel device (4.3 versus 3.6; p is less than 0.01), while favoring the conventional transducer (3.8 versus 4.3; p = 0.04). CONCLUSION: Combat medic eFAST performance utilizing both devices did not differ with respect to time to completion, diagnostic accuracy, and technical adequacy. Medics with limited ultrasound experience performed diagnostically accurate eFAST after a brief training intervention. Future research should assess learning gaps and skill retention in order to guide development of US military ultrasound training programs for combat medics.

US Army Combat Medic Performance With Portable Ultrasound to Detect Sonographic Findings of Pneumothorax in a Cadaveric Model.

BACKGROUND: Ultrasound, due to recent advances in portability and versatility, has become a valuable clinical adjunct in austere, resource-limited settings and is well demonstrated to be an accurate/efficient means to detect pneumothorax. The purpose of this study was to evaluate the impact of hands-on ultrasound training on ultrasound-naive US Army combat medics' ability to detect sonographic findings of pneumothorax with portable ultrasound in a cadaver model. METHODS: Ultrasound-naive US Army combat medics assigned to conventional military units were recruited from a single US Army installation and randomized to receive either didactic training only, or "blended" (didactic and hands-on) training on ultrasound detection of pneumothorax. Blinded participants were asked to perform a thoracic ultrasound exam on ventilated human cadaver models. Primary outcome measured was sensitivity and specificity of detecting sonographic findings of pneumothorax between cohorts. RESULTS: Forty-three participants examined a total of 258 hemithoraces. The didactic-only cohort (n = 24) detected sonographic findings of pneumothorax with a sensitivity of 68% and specificity of 57%. The blended cohort (n = 19) detected sonographic findings of pneumothorax with an overall sensitivity of 91% and specificity of 80%. Detection sensitivities were similar between B-mode versus M-mode use. CONCLUSION: US Army combat medics can use portable U/S to detect sonographic findings of pneumothorax in a human cadaver model with high sensitivity after a brief, blended (didactic and hands-on) training intervention.

FAST Performance in a Stationary versus In-Motion Military Ambulance Utilizing Handheld Ultrasound: A Randomized Controlled Study.

OBJECTIVE: On-scene prehospital conditions and patient instability may warrant a during-transport ultrasound (US) exam. The objective of this study was to assess the effect of ambulance turbulence on the performance of the Focused Assessment with Sonography in Trauma (FAST) with a handheld US device. METHODS: This was a randomized controlled trial in which participants were randomized to perform a FAST in either a stationary or an in-motion military ambulance. Participants were physicians and physician assistants (PAs) with previous FAST training. All exams were performed on an US phantom model. The primary outcome was FAST completion time, reported as a mean, in seconds. Secondary outcomes included image acquisition score (range of 0-24, reported as a mean), diagnostic accuracy (reported as sensitivity and specificity), and a post-participation survey with five-item Likert-type scales. RESULTS: Twenty-seven participants performed 27 FASTs, 14 in the stationary ambulance and 13 in the in-motion ambulance. All participants obtained the four requisite views of the FAST. A significant difference was detected in image acquisition scores in favor of the stationary ambulance group (19.4 versus 16.7 [95% CI for difference, 0.9-4.4]; P <.01). Significant differences in survey items between groups were related to obtaining and maintaining US images and the exam conditions. There was not a difference in FAST completion time between groups (98.5 seconds versus 78.7 seconds [95% CI for difference, -13.5 seconds to 53.1 seconds]; P = .23). Sensitivity and specificity of FAST in the stationary ambulance was 85.7% (95% CI, 67.3%-96.0%) and 96.4% (95% CI, 81.7%-99.9%) versus 96.2% (95% CI, 80.4%-99.9%) and 100.0% (95% CI, 86.8%-100.0%) in the in-motion ambulance group (P = .21). CONCLUSION: Vehicular motion did not affect FAST completion time and diagnostic accuracy; however, it did reduce FAST image acquisition scores. The results suggest timely and diagnostically accurate FASTs may be completed by experienced sonographers during moderate levels of ambulance turbulence. Further investigation assessing the utility and limitations of newer handheld US devices in various prehospital conditions is warranted.

Impact of Succinct Training on Open Cricothyrotomy Performance: A Randomized, Prospective, Observational Study of U.S. Army First Responders.

INTRODUCTION: Primary airway failure has become the second most common cause of potentially survivable battlefield fatality. Cricothyrotomy is taught to all U.S. military providers as a means of securing an airway in extremis. However, retrospective studies show that cricothyrotomy failure rates for U.S. military first responders performing the procedure in combat is 33%. Our hypothesis was that these rates could be improved. MATERIALS AND METHODS: We conducted a randomized, prospective, observational study to evaluate the effects of inexpensive, succinct training on open cricothyrotomy performance by studying two unique U.S. Army First Responder participant groups. One participant group consisted of regular U.S. Army Medics (68 Ws). The second group was Special Operations Combat Medics. We evaluated both groups' baseline ability to correctly perform a cricothyrotomy and then randomly assigned individuals within each group to either a training or practice group. RESULTS: The training group had a higher proportion of success and performed the cricothyrotomy faster than the practice group with 68 Ws group appearing to benefit most from training: their procedural success rates increased by an average of 23%, and their average time-to-correct-placement decreased by 21 seconds-a 33% improvement over baseline. CONCLUSION: With one manikin, a qualified trainer, and $35 worth of expendable supplies, 10 medics could be trained in the procedure in just 2-3 hours. Our study suggests that this simple intervention has the potential to significantly improve U.S. Army First Responders' ability to correctly perform an open cricothyrotomy and drastically decrease the time needed to perform this lifesaving procedure correctly, possibly saving one in four potentially survivable combat casualties suffering from airway compromise.

Impact of a 4-hour Introductory eFAST Training Intervention Among Ultrasound-Naïve U.S. Military Medics.

INTRODUCTION: Advances in the portability of ultrasound have allowed it to be increasingly employed at the point of care in austere settings. Battlefield constraints often limit the availability of medical officers throughout the operational environment, leading to increased interest in whether highly portable ultrasound devices can be employed by military medics to enhance their provision of combat casualty care. Data evaluating optimal training for effective medic employment of ultrasound is limited however. This prospective observational cohort study's primary objective was to assess the impact of a 4-hour introductory training intervention on ultrasound-naïve military medic participants' knowledge/performance of the eFAST application. MATERIALS AND METHODS: Conventional U.S. Army Medics, all naïve to ultrasound, were recruited from across JBLM. Volunteer participants underwent baseline eFAST knowledge assessment via a 50-question multiple-choice exam. Participants were then randomized to receive either conventional, expert-led classroom didactic training or didactic training via an online, asynchronously available platform. All participants then underwent expert-led, small group hands-on training and practice. Participants' eFAST performance was then assessed with both live and phantom models, followed by a post-course knowledge exam. Concurrently, emergency medicine (EM) resident physician volunteers, serving as standard criterion for trained personnel, underwent the same OSCE assessments, followed by a written exam to assess their baseline eFAST knowledge. Primary outcome measures included (1) post-course knowledge improvement, (2) eFAST exam technical adequacy, and (3) eFAST exam OSCE score. Secondary outcome measures were time to exam completion and diagnostic accuracy rate for hemoperitoneum and hemopericardium. These outcome measures were then compared across medic cohorts and to those of the EM resident physician cohort. RESULTS: A total of 34 medics completed the study. After 4 hours of ultrasound training, overall eFAST knowledge among the 34 medics improved from a baseline mean of 27% on the pretest to 83% post-test. For eFAST exam performance, the medics scored an average of 20.8 out of a maximum of 22 points on the OSCE. There were no statistically significant differences between the medics who received asynchronous learning versus traditional classroom-based learning, and the medics demonstrated comparable performance to previously trained EM resident physicians. CONCLUSIONS: A 4-hour introductory eFAST training intervention can effectively train conventional military medics to perform the eFAST exam. Online, asynchronously available platforms may effectively mitigate some of the resource requirement burden associated with point-of-care ultrasound training. Future studies evaluating medic eFAST performance on real-world battlefield trauma patients are needed. Skill and knowledge retention must also be assessed for this degradable skill to determine frequency of refresher training when not regularly performed.

U.S. Army Combat Medic eFAST Performance with a Novel Versus Conventional Transducers: A Randomized, Crossover Trial.

BACKGROUND: Point-of-injury extended focused assessment with sonography in trauma (eFAST) may identify life-threatening torso hemorrhage and expedite casualty evacuation. The purpose of this study was to compare combat medic eFAST performance between the novel and conventional ultrasound (US) transducers. METHODS: We conducted a randomized crossover trial. Medic participants, previously naïve to US, were randomized to the type of transducer first utilized. The primary outcome was eFAST completion time in seconds. Secondary outcomes included diagnostic accuracy, technical adequacy, and transducer ease-of-use rating. RESULTS: Forty medics performed 160 eFASTs. We found a statistically significant difference in eFAST completion times in favor of conventional transducers (304 vs. 358 s; P = 0.03). There was no statistically significant difference between the conventional and novel transducers in terms of diagnostic accuracy (97.7% vs. 96.0%; P = 0.25) and technical adequacy (65% vs. 72.5%; P = 0.11). Median transducer ease-of-use rating (Likert 1-5 scale) was statistically significant in favor of the conventional transducers (5 vs. 4; P = < 0.001). CONCLUSIONS: Extended focused assessment with sonography in trauma exam times was faster with the conventional transducers. Combat medics performed diagnostically accurate eFASTs with both transducer types in a simulated aid station setting after a brief training intervention. Conventional transducers were rated higher for ease-of-use.

Inspiring the Future of Physician Assistant Ultrasound Education: Lessons Learned From the Inaugural Yes, iScan Event.

PURPOSE: Point-of-care ultrasound (POCUS), despite its rapid integration into undergraduate medical education curriculum, remains underutilized among physician assistant (PA) programs, with a resultant training gap between PAs and their physician collaborators. Herein, we present the Yes, iScan Ultrasound event, piloted at the 2018 American Academy of PAs (AAPA) conference, as a means to generate PA student interest in, and introductory engagement with, the emerging clinical adjunct of POCUS. METHODS: Physician assistant students and instructors were recruited to voluntarily participate. Student participants received pre-event online training access. They then competed in a team-based 8-hour competition covering core POCUS concepts of image acquisition, interpretation, and clinical implementation. Student participants' pre- and post-event self-assessments of their knowledge of how ultrasound could be implemented into clinical practice were analyzed using a 2-tailed t-test. RESULTS: A total of 62 students participated in the competition, with a post-event response rate of 53%. Surveys demonstrated a statistically significant post-event increase in knowledge of how ultrasound integrates into clinical practice from 3.9 to 6 (7-point Likert scale, P-value < .01, 95% confidence interval -2.51 to -1.76). Seventy-nine percentage of students reported being highly engaged throughout the event, with 95% of students recommending recurring incorporation into future AAPA conferences. CONCLUSIONS: Students reported high engagement and a significant increase in their knowledge of how POCUS may integrate into clinical practice following their participation. Although these data suggest that such events are successful at generating enthusiasm for this emerging clinical adjunct, further studies on the impact of the event toward increased POCUS integration into PA education are recommended.

Ultrasound Evaluation of Soft-Tissue Foreign Bodies by US Army Medics.

OBJECTIVE: The study's primary objective was to determine army medics' accuracy performing bedside ultrasound (US) to detect radiolucent foreign bodies (FBs) in a soft-tissue hand model. Secondary objectives included the assessment of US stand-off pad effects on soft-tissue FB detection rates and assess established FB detectable lower limit size of 2 mm. METHODS: Prospective, single blinded, observational study of US-naïve Army medics' abilities utilizing bedside US to detect wooden FBs in a chicken thigh model with or without an US stand-off pad. After a 2 h training period, medics' abilities to detect 1-3 mm FB utilizing a SonoSite® M-Turbo US and 13-6 MHz linear probe were assessed. RESULTS: After a 2 h training period, 28 medics had a sensitivity and specificity of 73% and 78% detecting 1-3 mm FBs utilizing standard US equipment. The medics' sensitivity and specificity were both 78% in detecting radiolucent FBs 2 mm and larger without a stand-off pad. The sensitivity and specificity decreased to 48%, 62%, and 67% when utilizing a stand-off pad to detect 1, 2, and 3 mm soft-tissue FBs. Sub 2 mm detection rates decreased from 82% for 2 mm FB to 64% for 1 mm FBs without utilizing a stand-off pad. CONCLUSION: Army medics with minimal US experience successfully identified FBs embedded in hand models with accuracies similar to radiologists and emergency medicine physicians. However, radiolucent FB detection sensitivity and specificity decreased in US-naïve Army medics utilizing stand-off pads. In addition, this study reconfirmed the lower limit of FB detection rates at 2 mm. These results support Army medics' utilization of US to evaluate for superficial radiolucent FBs of the hand.

Evaluation of Glucomannan Powder as an Ultrasound Transmission Gel Alternative for Resource-Constrained Environments: A Prospective, Comparative Study.

INTRODUCTION: Resource and logistical constraints may limit the availability of commercial ultrasound (US) transmission gel (USTG) in austere environments. Glucomannan powder, a dietary fiber supplement, can be mixed with tap water to form a gel that may be a field-expedient substitute for USTG. We compared glucomannan gel with a commercial USTG for US image adequacy and quality. METHODS: A single clinician obtained 193 US video clips from 14 different examinations on live-tissue and simulation training models using both commercial and glucomannan USTGs. Four US fellowship-trained providers, blinded to type of gel used, independently reviewed the randomized US video clips. The primary outcome of US image adequacy was scored as "yes" or "no" and analyzed using Pearson χ2 analysis. The secondary outcome of image quality was rated on a 0 to 5 Likert scale and analyzed with the independent t test. RESULTS: For US image adequacy, commercial USTG was superior to glucomannan gel (P=0.042, 95% CI: 96.5-96.6%), with commercial USTG adequate in 96.6% of images (375 of 388 "yes"), whereas glucomannan USTG was adequate in 93.5% (359 of 384 "yes") of images. For US image quality there was no statistically significant difference between the 2 USTGs (P=0.176, 95% CI: 93.4-93.5%), with commercial USTG rated at 3.4±1.0 and glucomannan gel at 3.3±1.1. CONCLUSION: Despite a high image adequacy rate, glucomannan gel proved inferior to commercial USTG for US image adequacy but produced equivalent image quality. Glucomannan USTG may be a reasonable substitute when commercial USTG is unavailable.

Military Medic Performance with Employment of a Commercial Intraosseous Infusion Device: A Randomized, Crossover Study.

Background: Obtaining intraosseous (IO) access remains an invaluable skill in the management and resuscitation of patients on the battlefield. The U.S. Army Combat Medic is currently trained to utilize a sternal IO device (FAST1® Intraosseous Infusion System); however, the Arrow® EZ-IO® Intraosseous Vascular Access System offers unique benefits including ease of use, reload ability, and placement location versatility. Studies have demonstrated high success rates in the operational settings using the EZ-IO® System; however, no prospective studies have been conducted to assess the performance of U.S. Army's conventional Combat Medics using the EZ-IO® System. We hypothesized that EZ-IO® System-naïve medics would have a statistically significant success rate advantage utilizing the proximal tibia approach versus proximal humerus approach. Methods: A total of 77 U.S. Army Medics (Military Occupational Specialty [MOS] 68 W) volunteer participants were recruited to participate in this randomized, crossover study. Participants received a standardized audio-visual-enhanced lecture on EZ-IO® System use without hands-on training and then randomized into two study groups according to which anatomical approach they would attempt first. Results were analyzed to determine participants' first-attempt mean success rates, mean required time to properly place the needle into simulated humeral head and proximal tibial bone models, and mean survey results measuring the participant's subjective assessment of the two approaches to include, along with training and testing experience. The data of those not naïve to the employment of the EZ-IO® System were excluded. Results: The primary outcome measurement of overall mean participant success rate with attempted insertions into proximal tibial and humeral head bone models was 88% and 86%, respectively, demonstrating no statistically significant difference by approach, with no significant learning or design confounding effects (p > 0.05). Secondary outcomes of mean procedural time and subjective comfort and skill benefit were reported. Successful procedure times between the two anatomical approaches demonstrated a statistically significant mean time advantage of 17.1 s (p < 0.05) in proximal tibia IO placement. Overall participant mean subjective comfort level utilizing the EZ-IO® System (0- to 10-point scale with a 0 being not comfortable and a 10 being very comfortable) was 8.2, with no statistically significant difference in comfort discovered when comparing the two approaches. Participants reported a mean subjective score (0-10 scale with a 0 providing no benefit and a 10 providing extreme benefit) of 9.3 when asked how beneficial their newly learned IO system skill was to their overall medical skillset. Conclusions: The overall first-attempt success rates of U.S. Army Combat Medics employing the EZ-IO® System are similar to the success rates of FAST1® device employment and similar to the success of other provider cohorts using the EZ-IO® device. Coupled with perceived benefit of adding the EZ-IO® System to their combat medic skillset, these data warrant further study and consideration for the incorporation of commercial IO systems into U.S. Army Combat Medic initial, sustainment, and pre-combat training and standard issue equipment.

A Novel Ultrasound Transmission Gel for Resource-Constrained Environments.

Ultrasound represents an ideal diagnostic adjunct for medical personnel operating in austere environments, because of its increasing portability and expanding number of point-of-care applications. However, these machines cannot be used without a transmission medium that allows for propagation of ultrasound waves from transducer to patient. This article describes a novel ultrasound gel alternative that may be better suited for resource-constrained environments than standard ultrasound gel, without compromising image quality.

Revolution or Evolution? A Proposal for the Integration of Point-of-Care Ultrasound Into Physician Assistant Clinical Practice.

Advances in technology and increased affordability of machines have allowed ultrasound to become ubiquitous across the spectrum of medical care. Increasing portability has brought ultrasound to the point of care in multiple medical specialties. Formal ultrasound training is rapidly being incorporated into multispecialty residency programs and undergraduate medical education curricula, yet little formal training exists for physician assistants (PAs) on this emerging clinical adjunct. This article outlines recommendations for and barriers to the incorporation of bedside ultrasound into PA clinical practice.

A rare cause of abdominal pain and hypotension in pregnancy.

Splenic artery aneurysm rupture is rare. Pregnancy is a significant risk factor and the mortality for mother and fetus is very high if the rupture is undiagnosed or diagnosis is delayed. Patients typically present with abdominal pain and hemodynamic instability. This article describes a woman and fetus who survived a ruptured splenic artery aneurysm.

Ultrasound detection of pneumothorax with minimally trained sonographers: a preliminary study.

BACKGROUND: Prompt recognition and treatment of a tension pneumothorax is critical to reducing mortality in both military and civilian settings. Physician assistants, Special Operations Forces (SOF) and conventional force Medics are often the first medical providers to care for combat trauma patients with penetrating chest trauma and frequently have limited diagnostic capabilities available to them due to mission constraints. The purpose of this study is to examine the potential for non-physician providers to determine the absence or presence of a pneumothorax in a porcine model, with the use of a portable ultrasound machine, after receiving minimal training. METHODS: Physician assistants, SOF and conventional force Medics, veterinary technicians, and food service inspectors, all naive to ultrasound, were recruited for this study. Participants underwent a brief presentation on detection of a pneumothorax by ultrasound and were then asked to perform a thoracic ultrasound examination on euthanized, ventilated swine. Some of the swine were induced with a pneumothorax prior to these examinations, and all participants were blinded to the absence or presence of a pneumothorax. RESULTS: Twenty-two participants examined a total of 44 hemithoraces. A total of 21 out of 22 pneumothoraces were correctly identified with one false-negative. All 22 normal hemithoraces were correctly identified for a sensitivity of 95.4% (95% CI 0.75-0.99), and a specificity of 100% (95% CI 0.81-1.00), with PPV of 100%, NPV of 95.6%. CONCLUSIONS: Non-physician healthcare providers can accurately detect a pneumothorax with portable ultrasound after receiving minimal focused training.

Severe stress in an elderly woman causes a temporary "broken" heart.

This novel cardiac syndrome has clinical features that mimic those of acute myocardial infarction. The typical patient is a postmenopausal woman.