Feasibility of emergency physician diagnosis of hypertrophic pyloric stenosis using point-of-care ultrasound: a multi-center case series

Hypertrophic pyloric stenosis (HPS) is an acute abdominal emergency in infants that often presents to Emergency Departments. The clinical diagnosis of HPS relies on palpation of an olive-sized mass in the right upper quadrant of an infant with a history of projectile vomiting. However, studies have shown that clinicians cannot detect the olive in 11% to 51% of cases. Ultrasonography is the imaging modality of choice to diagnose HPS. HPS has a highly characteristic sonographic appearance that makes it readily identifiable on ultrasound. To our knowledge, there have been no reports documenting the ability of Emergency Physicians to diagnose HPS using point-of-care ultrasound. We present a multi-center case series (n = 8) of HPS diagnosed by Emergency Physician-performed ultrasound. We review the technique of incorporating point-of-care ultrasound into the physical examination of infants with suspected HPS and discuss the possible role of point-of-care ultrasound in the management of these patients.     

MitraClip-Associated Endocarditis: Emergency Department Diagnosis With Point of Care Ultrasound

BackgroundManagement of mitral valve regurgitation in patients with multiple comorbidities is complicated because of poor surgical candidacy. Less invasive techniques for these patients include the MitraClip device, an endovascular repair option used to reduce mitral valve regurgitation symptoms. However, complications include leaflet damage, stenosis, and infectious endocarditis.Case ReportFour years after MitraClip placement, an 80-year-old man presented to the emergency department with progressive dyspnea. He was diagnosed with MitraClip-associated infectious endocarditis by the emergency physician using point-of-care ultrasound. There are 6 reported cases of infective endocarditis in patients with MitraClip devices, with this being the first case identified using point-of-care ultrasound. This is also the first reported case of MitraClip-associated Corynebacterium endocarditis.Why Should an Emergency Physician Be Aware of This?The use of the MitraClip device and its echocardiographic appearance is not widely described in the published emergency medicine literature. Knowledge of this device, its appearance, and the potential complications is essential for emergency physicians caring for these patients. Rapid diagnosis may lead to earlier initiation of treatment and optimal disposition for these complex patients.     

Residency Training in Emergency Ultrasound: Fulfilling the Mandate

Although bedside ultrasound is listed in the Model of the Clinical Practice of Emergency Medicine as an integral diagnostic procedure, the manner in which the didactic, hands-on, and experiential components of emergency ultrasound are taught is not specifically prescribed by the Residency Review Committee for Emergency Medicine (RRC-EM) or any single sponsoring group. Seven professional organizations [the American Board of Emergency Medicine (ABEM), the American College of Emergency Medicine (ACEP), the Council of Emergency Medicine Residency Directors (CORD), the Emergency Medicine Residents Association (EMRA), the National Association of EMS Physicians (NAEMSP), the RRC-EM, and the Society for Academic Emergency Medicine (SAEM)] developed the Scope of Training Task Force, with the goal of identifying emerging areas of clinical importance to the specialty of emergency medicine, including emergency department (ED) ultrasound. The Task Force then identified a group of recognized authorities to thoughtfully address the issue of ED ultrasound training. This report represents a consensus of these identified experts on how emergency ultrasound training should be incorporated into emergency medicine residency programs.     

Point-of-Care Ultrasound Assists Diagnosis of Spontaneously Passed Common Bile Duct Stone

BackgroundCholedocholithiasis complicates approximately 10% of gallstone disease. Spontaneous stone migration out of the common bile duct (CBD) may occur in as many as 20% of choledocholithiasis cases. A decrease in CBD caliber occurs in the setting of spontaneous stone passage, but to our knowledge, this finding has not been appreciated using point-of-care ultrasound (POCUS) in the emergency medicine setting.Case ReportA 49-year-old woman presented to our Emergency Department (ED) with a complaint of epigastric pain radiating to the left shoulder. On examination she was found to have epigastric tenderness to palpation, but no guarding or rebound. POCUS demonstrated a dilated common bile duct, and her liver function tests were abnormally high. She was admitted to Medicine with concern for choledocholithiasis and plan for endoscopic retrograde cholangiopancreatography (ERCP), but her pain had resolved shortly after ED arrival. A repeat ultrasound examination demonstrated a normal-caliber common bile duct approximately 3 h after the initial scan.Why Should an Emergency Physician Be Aware of This?Choledocholithiasis often requires admission and invasive testing. Using POCUS in conjunction with liver function tests and patient assessments may obviate a need for ERCP.     

Diagnosis of Rectus Sheath Hematoma by Point-of-Care Ultrasound

BackgroundRectus sheath hematoma is a rare but dangerous cause of undifferentiated hypotension and abdominal pain in the emergency department (ED). Point-of-care ultrasound is a useful tool in its identification.Case ReportA 75-year-old woman presented to the ED with hypotension of an unclear etiology. She was found, via point-of-care ultrasound, to have a large and expanding rectus sheath hematoma. She ultimately had embolization of a lacerated epigastric artery, likely caused by enoxaparin injection.Why Should an Emergency Physician Be Aware of This?Rectus sheath hematomas are a dangerous and often unrecognized source of abdominal pain and shock in anticoagulated patients. Commonly applied point-of-care ultrasound algorithms to assess hypotension may miss this entity.     

My patient is injured: identifying foreign bodies with ultrasound

Patients commonly present to the emergency department with a suspected retained foreign body, following penetrating injury. While plain radiography is often the first line in identifying radio-opaque foreign bodies, radiolucent foreign bodies such as wood and plastic can easily be missed. Furthermore, real-time visualization of such a foreign body can assist in its removal. This article evaluates the use of point-of-care ultrasound by emergency physicians in the identification and removal of soft-tissue foreign bodies along with describing the appropriate technique and highlighting the potential pitfalls. An illustrated case example is presented that highlights the benefits of point-of-care ultrasound foreign body detection and guided removal.     

Portal Venous Gas on Point-of-Care Ultrasound in a Case of Cecal Ischemia

BackgroundPortal venous gas has mainly been studied in pediatrics and seen in cases of necrotizing enterocolitis. It is a rare finding in adults and is typically associated with underlying intestinal ischemia or other malignant intra-abdominal pathology. Portal venous gas is seen more readily on ultrasound compared to radiographs in both pediatric and adult patients. Findings include lucencies extending to the periphery of the liver, echogenic bubbles flowing centrifugally throughout the portal venous system, and bidirectional spikes interrupting the monophasic portal venous waveform on spectral analysis.Case ReportWe present a case of a 36-year-old female who presented with abdominal pain. She had findings consistent with portal venous gas on point-of-care ultrasound, prompting computed tomography of her abdomen and surgical consultation. She was ultimately found to have cecal ischemia from cecal volvulus, had surgical resection and anastomosis, and was able to be discharged from the hospital following recovery.Why Should an Emergency Physician Be Aware of This?With the ever-increasing use of point-of-care ultrasound, emergency physicians should be aware of the findings consistent with portal venous gas as well as its implications. Emergency physicians should know portal venous gas is associated with intestinal ischemia and other malignant pathologies and should prompt more advanced imaging or surgical consultation when observed. Emergency physicians should also understand the distinctions between portal venous gas and pneumobilia found on point-of-care ultrasound, given that portal venous gas is typically a malignant finding and pneumobilia is most frequently benign.     

Use of Point-of-Care Ultrasound for the Diagnosis of Ovarian Hyperstimulation Syndrome

BackgroundOvarian hyperstimulation syndrome (OHSS) occurs when ovaries are overstimulated and enlarged due to fertility treatments resulting in a shift of serum from the intravascular space to the third space, mainly the abdominal cavity. It is the most serious complication of ovarian hyperstimulation for assisted reproduction.Case ReportWe present the case of a 40-year-old woman who presented with abdominal bloating and nausea 2 weeks after undergoing in vitro fertilization (IVF); she was diagnosed by an outside radiology ultrasound as having a ruptured ovarian cyst. A point-of-care emergency ultrasound performed by the emergency physician made the diagnosis of ovarian hyperstimulation syndrome. This led to more expedient management and obstetrical consultation.Why Should an Emergency Physician Be Aware of This?Abdominal bloating and nausea are common presenting complaints in pregnant women. OHSS is a rare but potentially fatal complication of IVF. Recognition and early diagnosis by the emergency physician can lead to appropriate intervention and consultation.     

Predictors of Success in Emergency Medicine Ultrasound Education

OBJECTIVES: To compare emergency medicine resident performance on an ultrasound-oriented, American Board of Emergency Medicine-styled written examination with the following variables in resident education: number of ultrasound scans performed, presence of a formal, structured ultrasound rotation, presence of a mandatory ultrasound rotation, number of hours of didactic ultrasound education, and percentage of ultrasound education taught by emergency physicians. METHODS: This was a prospective cohort study involving 14 residency programs. A 60-question multiple-choice test was completed by individual residents and returned for scoring. RESULTS: 262 residents completed the study. Average score was 39.1/60 +/- 6.5 (65%). Scores improved as residency year increased (year 1: 36.6, year 2: 39.3, year 3: 42.6) (p < 0.005). Scores improved as number of scans performed increased from 34.3 (57%) for those residents who had performed 0-10 scans to 45.4 (76%) for those with >150 scans (p < 0.005). The presence of an ultrasound rotation at an emergency medicine residency program also produced a statistically significant increase in test score (OR 1.82; 95% CI = 1.29 to 2.55). Residents at programs spending the least time (6 to 15 hours) on didactic education throughout the residency predicted examination failure (OR 0.60; 95% CI = 0.39 to 0.93). Increasing the amount of resident ultrasound teaching by emergency physicians improved the score, but this did not reach significance (p = 0.357). CONCLUSIONS: Improved resident performance on an ultrasound written examination was associated with increasing resident year, number of scans performed, and the presence of an ultrasound rotation at the residency program. Increasing the number of didactic hours spent on ultrasound each year beyond 15 hours showed no improvement in resident performance.     

Use of Ocular Point-of-Care Ultrasound in a Difficult Pediatric Examination: A Case Report of an Emergency Department Diagnosis of Retinoblastoma

BackgroundEye examination in distressed young children can be challenging in a busy emergency department. A full, detailed evaluation is, however, often needed in ocular emergencies.Case ReportA 2-year-old boy presented to our pediatric emergency department with refusal to open his left eye for 1 day. Eye examination was difficult and yielded limited findings, despite analgesia and parental facilitation. Under such circumstances, this might require sedation or forcibly everting the child's eyelids for the eye evaluation. A rapid ocular point-of-care ultrasound was performed, which revealed sonographic findings suggestive of a retinoblastoma in the left eye.Why Should an Emergency Physician Be Aware of This?The use of ocular point-of-care ultrasound facilitated the diagnosis of retinoblastoma in a child who was highly distressed and difficult to examine. Its use under such circumstances facilitated the patient's prompt evaluation and subsequent management.     

Pediatrician performed point-of-care ultrasound for the detection of ingested foreign bodies: case series and review of the literature

PurposeForeign body (FB) ingestions represent a common problem in children. History and physical examination are commonly not enough to diagnose a foreign body ingestion; therefore, conventional radiography is routinely used to detect them. Point-of-care ultrasound is widely used in the emergency department for several diagnostic applications but there are few articles describing the possibility to use point-of-care ultrasound to detect ingested foreign bodies, and the necessary training to get competent in this application. The main objective of this paper is to illustrate the use of point-of-care ultrasound (POCUS) to detect ingested foreign bodies. The secondary objective is to describe a limited training, necessary for emergency pediatricians, to obtain this skill.MethodsThis is a case series of eight pediatric patients who presented to the pediatric Emergency Department (ED), with suspected ingestion of FB, and were assessed with POCUS. Physician sonographers were two pediatricians and three residents in pediatrics working in two Italian Pediatric EDs. All sonographers participated in a 2-day POCUS workshop which included the most common pediatric POCUS applications.ResultsPOCUS, performed by emergency pediatricians who participated to a limited training, allowed to always identify the foreign bodies ingested.ConclusionsWe demonstrate that an appropriate and limited training allows pediatric emergency physicians to correctly identify foreign body in the esophagus or stomach. Point-of-care ultrasound in foreign body ingestion in the Emergency Department may allow to prioritize the escalation of care in children and it can contribute to reduce the time to endoscopic management when needed.Electronic supplementary materialThe online version of this article (10.1007/s40477-020-00452-z) contains supplementary material, which is available to authorized users.     

Scan the lung: Point-of-care ultrasound of a pulmonary consolidation with loculated pleural effusion

Thoracic ultrasound has become an increasingly valuable tool in the evaluation of critically ill patients in the emergency department (ED). The utility of point-of-care ultrasound (POCUS) to identify suspected pneumothorax, pulmonary edema, pleural effusion and pneumonia has been well established (Pagano et al.; Brogi et al.; Cortellaro et al.; Irwin and Cook [1–4]). The 2014 American College of Emergency Physicians (ACEP) Ultrasound Imaging Compendium included lung and pleural ultrasound with the primary indication of identifying pneumothorax and pleural effusion as part of the core POCUS indications for all emergency physicians [5]. We present a unique case in which a patient presented to the ED in respiratory distress. Portable chest X-ray demonstrated near complete opacification of his right hemithorax. POCUS demonstrated a large right sided loculated pleural effusion with associated septations and surrounding consolidation suggestive of a parapneumonic effusion.     

Emergency echocardiography

Emergency echocardiography refers to the use of cardiac ultrasound to address critical and time-sensitive clinical questions during the initial evaluation and treatment of the critically ill patient presenting to the emergency department. The information obtained can be pivotal to a physician's clinical decision making and can guide further diagnostic or therapeutic interventions. This article provides an evidence-based discussion of the common uses of emergency transthoracic echocardiography, as well as its benefits and limitations in the current practice of emergency medicine.     

My patient has got abdominal pain: identifying biliary problems

Right upper quadrant and epigastric abdominal pain are common presenting complaints in the emergency department. With increasing access to point-of-care ultrasound, emergency physicians now have an added tool to help identify biliary problems as a cause of a patient’s right upper quadrant pain. Point-of-care ultrasound has a sensitivity of 89.8% (95% CI 86.4–92.5%) and specificity of 88.0% (83.7–91.4%) for cholelithiasis, very similar to radiology-performed ultrasonography. In addition to assessment for cholelithiasis and cholecystitis, point-of-care ultrasound can help emergency physicians to determine whether the biliary system is the source of infection in patients with suspected sepsis. Use of point-of-care ultrasound for the assessment of the biliary system has resulted in more rapid diagnosis, decreasing costs, and shorter emergency department length of stay.     

A Narrative Review of Common Uses of Ophthalmic Ultrasound in Emergency Medicine

BackgroundThe timely evaluation of ocular conditions in the emergency department (ED) can be difficult due to a general lack of specialized equipment, trained personnel, and the time-sensitive nature of emergent ocular conditions. Recently, the use of ocular point-of-care ultrasound (POCUS) has been shown to be particularly useful in the ED. POCUS can be used to promptly diagnose various ocular pathologies, which include ocular trauma, vitreous hemorrhage, central retinal artery occlusion, and retinal detachment.ObjectivesThis narrative review seeks to inform the reader of current literature regarding the use of POCUS for the assessment of various ocular emergencies in the ED. The goal of this review is to provide the emergency physician with succinct and up-to-date information and instruction regarding the current uses of POCUS for patients presenting with particular ocular emergencies. Ocular pathologies that are common (ocular trauma) or for which ultrasound is particularly useful (such as retinal detachment) are discussed. Other ocular pathologies are also briefly discussed, such as central retinal artery occlusion, which is a promising new application for ultrasound evaluation.DiscussionThere have been many studies that provide evidence for the utility of POCUS in the evaluation of trauma and other ocular pathologies, including vitreous hemorrhage, retinal detachment, and central retinal artery occlusion.ConclusionsOcular POCUS is a useful modality in the evaluation of acute ocular complaints in the ED. Emergency physicians should be aware of these findings and feel confident in the utility of ocular POCUS in the ED.     

Identifying infant hydrocephalus in the emergency department with transfontanellar POCUS

Hydrocephalus carries significant morbidity in the infant population. Although clinical symptoms are often nonspecific, hydrocephalus is easily identified using transfontanellar sonography. In this review, we provide the emergency physician with a succinct overview of infant hydrocephalus and the point-of-care ultrasound (POCUS) technique for identification of this pathology.     

Point-of-Care Ultrasound Diagnosis of Cesarean Scar Ectopic Pregnancy: A Case Series

BackgroundA cesarean scar pregnancy (CSP) is a clinically important form of ectopic pregnancy that carries a high risk of maternal morbidity and mortality. As the rate of cesarean sections has risen, this diagnosis is becoming an increasingly important consideration for providers caring for patients in early pregnancy.Case ReportWe present three cases of CSPs in which point-of-care ultrasound expedited the diagnosis and treatment in the emergency department.Why Should an Emergency Physician Be Aware of This?Given the risks of an undiagnosed CSP, the increasing incidence of CSP, and the number of effective treatment options available in early gestation, the prompt and accurate diagnosis of CSP remains crucial to its successful management. As such, it is an important diagnosis for the emergency physician to consider when evaluating a patient in early pregnancy.     

Transperineal Ultrasound in the Diagnosis of Proctitis in the Emergency Department

BackgroundPatients with anorectal complaints commonly present to the emergency department (ED). In patients with prior history of pelvic radiation and those with risk factors for sexually transmitted infections, proctitis is frequently on the differential diagnosis. Computed tomography (CT) scans are frequently done in patients with atypical presentations and those with broader differential diagnoses. Although in cases with suspected uncomplicated proctitis, conducting a point-of-care transperineal ultrasound (TPUS) may provide sufficient data to confirm the diagnosis and ascertain a safe plan for outpatient management, thus limiting the need for CT scan, a frequent flow-limiting step in the ED.Case ReportIn this article, we present a brief case series of patients presenting to the ED with anorectal complaints in whom TPUS revealed circumferential symmetric rectal wall edema and pericolonic stranding suggestive of proctitis. History and subsequent imaging further supported these diagnoses; we also briefly detail the patients’ clinical course and outcomes.Why Should an Emergency Physician Be Aware of This?We propose the use of TPUS as the screening imaging for anorectal pathologies and those with suspected proctitis to increase its use among emergency physicians. We review the main sonographic features of proctitis alongside reports from clinical cases, as well as the potential advantages of TPUS as a first-line imaging modality as compared with CT or magnetic resonance imaging. Although the complexities of anorectal anatomy can make TPUS a more difficult ultrasound modality to master, integrating TPUS into clinical practice will prove beneficial to both physician and patient.     

A Necrotizing Fasciitis Fake Out on Point-of-Care Ultrasound—Watch the Shadow

Background

Point-of-care ultrasound has an increasing role in characterizing soft-tissue infections and has been described previously in the evaluation of necrotizing fasciitis (NF). The identification of air within the soft tissues can be very suggestive of NF in the correct clinical context.

Ultrasound Training for Emergency Physicians— A Prospective Study

OBJECTIVES: Bedside ultrasound examination by emergency physicians (EPs) is being integrated into clinical emergency practice, yet minimum training requirements have not been well defined or evaluated. This study evaluated the accuracy of EP ultrasonography following a 16-hour introductory ultrasound course. METHODS: In phase I of the study, a condensed 16-hour emergency ultrasound curriculum based on Society for Academic Emergency Medicine guidelines was administered to emergency medicine houseofficers, attending staff, medical students, and physician assistants over two days. Lectures with syllabus material were used to cover the following ultrasound topics in eight hours: basic physics, pelvis, right upper quadrant, renal, aorta, trauma, and echo-cardiography. In addition, each student received eight hours of hands-on ultrasound instruction over the two-day period. All participants in this curriculum received a standardized pretest and posttest that included 24 emergency ultrasound images for interpretation. These images included positive, negative, and nondiagnostic scans in each of the above clinical categories. In phase II of the study, ultrasound examinations performed by postgraduate-year-2 (PGY2) houseofficers over a ten-month period were examined and the standardized test was readministered. RESULTS: In phase I, a total of 80 health professionals underwent standardized training and testing. The mean +/- SD pretest score was 15.6 +/- 4.2, 95% CI = 14. 7 to 16.5 (65% of a maximum score of 24), and the mean +/- SD posttest score was 20.2 +/- 1.6, 95% CI = 19.8 to 20.6 (84%) (p < 0. 05). In phase II, a total of 1,138 examinations were performed by 18 PGY2 houseofficers. Sensitivity was 92.4% (95% CI = 89% to 95%), specificity was 96.1% (95% CI = 94% to 98%), and overall accuracy was 94.6% (95% CI = 93% to 96%). The follow-up ultrasound written test showed continued good performance (20.7 +/- 1.2, 95% CI = 20.0 to 21.4). CONCLUSIONS: Emergency physicians can be taught focused ultrasonography with a high degree of accuracy, and a 16-hour course serves as a good introductory foundation.