Antonio Riera

Use of Bedside Ultrasound to Assess Degree of Dehydration in Children With Gastroenteritis

OBJECTIVES Prospectively identifying children with significant dehydration from gastroenteritis is difficult in acute care settings. Previous work by our group has shown that bedside ultrasound (US) measurement of the inferior vena cava (IVC) and the aorta (Ao) diameter ratio is correlated with intravascular volume. This study was designed to validate the use of this method in the prospective identification of children with dehydration by investigating whether the IVC/Ao ratio correlated with dehydration in children with acute gastroenteritis. Another objective was to investigate the interrater reliability of the IVC/Ao measurements. METHODS A prospective observational study was carried out in a pediatric emergency department (PED) between November 2007 and June 2009. Children with acute gastroenteritis were enrolled as subjects. A pair of investigators obtained transverse images of the IVC and Ao using bedside US. The ratio of IVC and Ao diameters (IVC/Ao) was calculated. Subjects were asked to return after resolution of symptoms. The difference between the convalescent weight and ill weight was used to calculate the degree of dehydration. Greater than or equal to 5% difference was judged to be significant. Linear regression was performed with dehydration as the dependent variable and the IVC/Ao as the independent variable. Pearsons correlation coefficient was calculated to assess the degree of agreement between observers. RESULTS A total of 112 subjects were enrolled. Seventy-one subjects (63%) completed follow-up. Twenty-eight subjects (39%) had significant dehydration. The linear regression model resulted in an R² value of 0.21 (p < 0.001) and a slope (B) of 0.11 (95% confidence interval [CI] = 0.08 to 0.14). An IVC/Ao cutoff of 0.8 produced a sensitivity of 86% and a specificity of 56% for the diagnosis of significant dehydration. Forty-eight paired measurements of IVC/Ao ratios were made. The Pearson correlation coefficient was 0.76. CONCLUSIONS   In this pilot study the ratio of IVC to Ao diameters, as measured by bedside US, was a marginally accurate measurement of acute weight loss in children with dehydration from gastroenteritis. The technique demonstrated good interrater reliability.

Diagnosis of Intussusception by Physician Novice Sonographers in the Emergency Department

STUDY OBJECTIVE We investigate the performance characteristics of bedside emergency department (ED) ultrasonography by nonradiologist physician sonographers in the diagnosis of ileocolic intussusception in children. METHODS This was a prospective, observational study conducted in a pediatric ED of an urban tertiary care childrens hospital. Pediatric emergency physicians with no experience in bowel ultrasonography underwent a focused 1-hour training session conducted by a pediatric radiologist. The session included a didactic component on sonographic appearances of ileocolic intussusception, review of images with positive and negative results for intussusceptions, and a hands-on component with a live child model. On completion of the training, a prospective convenience sample study was performed. Children were enrolled if they were to undergo diagnostic radiology ultrasonography for suspected intussusception. Bedside ultrasonography by trained pediatric emergency physicians was performed and interpreted as either positive or negative for ileocolic intussusception. Ultrasonographic studies were then performed by diagnostic radiologists, and their results were used as the reference standard. Test characteristics (sensitivity, specificity, positive and negative predictive values) and likelihood ratios were calculated. RESULTS Six pediatric emergency physicians completed the training and performed the bedside studies. Eighty-two patients were enrolled. The median age was 25 months (range 3 to 127 months). Thirteen patients (16%) received a diagnosis of ileocolic intussusception by diagnostic radiology. Bedside ultrasonography had a sensitivity of 85% (95% confidence interval [CI] 54% to 97%), specificity of 97% (95% CI 89% to 99%), positive predictive value of 85% (95% CI 54% to 97%), and negative predictive value of 97% (95% CI 89% to 99%). A positive bedside ultrasonographic result had a likelihood ratio of 29 (95% CI 7.3 to 117), and a negative bedside ultrasonographic result had a likelihood ratio of 0.16 (95% CI 0.04 to 0.57). CONCLUSION With limited and focused training, pediatric emergency physicians can accurately diagnose ileocolic intussusception in children by using bedside ultrasonography.

Ultrasound evaluation of skull fractures in children: a feasibility study.

Objective The objective of this study was to investigate feasibility and evaluate test characteristics of bedside ultrasound for the detection of skull fractures in children with closed head injury (CHI). Methods This was a prospective, observational study conducted in a pediatric emergency department of an urban tertiary care children’s hospital. A convenience sample of children younger than 18 years were enrolled if they presented with an acute CHI, and a computed tomography (CT) scan was performed. Ultrasound was performed by pediatric emergency medicine physicians with at least 1 month of training in bedside ultrasound. Ultrasound interpretation as either positive or negative for the presence of skull fracture was compared with attending radiologist CT scan dictation. Test characteristics (sensitivity, specificity, and positive and negative predictive values) were calculated. Results Forty-six patients were enrolled. The median age was 2 years (range, 2 months to 17 years). Eleven patients (24%) were diagnosed with skull fractures on CT scan. Bedside ultrasound had a sensitivity of 82% (95% confidence interval [CI], 48%–97%), specificity of 94% (95% CI, 79%–99%), positive predictive value of 82% (95% CI, 48%–97%), and negative predictive value of 94% (95% CI, 79%–99%). Conclusions Bedside ultrasonography can be used by pediatric emergency medicine physicians to detect skull fractures in children with acute CHI. Larger studies are needed to validate these findings. Future studies should investigate the role of this modality as an adjunct to clinical decision rules to reduce unnecessary CT scans in the evaluation of acute CHI in children.

Latino Caregiver Experiences With Asthma Health Communication

In this article, we analyze qualitative data from a purposeful sample of limited English proficiency (LEP) asthma health caregivers. We used ethnically concordant, semistructured, in-depth Spanish-language interviews and a follow-up focus group to explore issues related to communication during pediatric asthma encounters in medical settings. Inductive coding of Spanish transcripts by a bilingual research team was performed until thematic saturation was reached. Several key findings emerged. LEP caregivers encountered significant asthma burdens related to emotional stress, observed physical changes, and communication barriers. Language-discordant communication and the use of ad hoc interpreters were common. This finding is complex, and was influenced by perceptions of interpreter availability, delays in care, feelings of mistrust toward others, and individual emotional responses. Language-concordant education and suitable action plans were valued and desired. We discuss a revealing depiction of the LEP caregiver experience with asthma health communication and recommend areas for further inquiry.

The impact of race and ethnicity on care in the pediatric emergency department.

Purpose of review To review healthcare disparities encountered by pediatric patients in the emergency department. The discussion focuses on recent research that is relevant to the field of pediatric emergency medicine. Recent findings The majority of recent research focuses on healthcare disparities affecting black and Hispanic children and adolescents. Disparities are identified in the areas of emergency department utilization, the provision of effective interpreter services, and the epidemiology and management of specific illnesses, including asthma, adolescent sexual health, and mental health. The findings suggest that disparities persist after controlling for socioeconomic factors and that the effect on healthcare outcomes is measurable. Interventions to mitigate healthcare disparities have shown mixed results. There is some evidence that disparity reduction is possible. Summary Recent research demonstrates that healthcare disparities exist in several areas affecting the delivery of quality pediatric emergency care. These disparities are shaped by a complex interaction of social, cultural, behavioral, educational, and financial factors. More research is needed to increase the body of knowledge as to why disparities exist. The success of this future research may require an interdisciplinary approach incorporating experts from multiple scientific fields.

Implementation of newly adopted technology in acute care settings: a qualitative analysis of clinical staff

Abstract Technologies are not always successfully implemented into practice. This study elicited experiences of acute care providers with the introduction of technology and identified barriers and facilitators in the implementation process. A qualitative study using one-on-one interviews among a purposeful sample of 19 physicians and nurses within 10 emergency departments and intensive care units was performed. Grounded theory, iterative data analysis and the constant comparative method were used to inductively generate ideas and build theories. Five major categories emerged: decision-making factors, the impact on practice, technology’s perceived value, facilitators and barriers to implementation. Barriers included negative experiences, age, infrequent use and access difficulties. A positive outlook, sufficient training, support staff and user friendliness were facilitators. This study describes strategies implicated in the successful implementation of newly adopted technology in acute care settings. Improved implementation methods and evaluation of implementation processes are necessary for successful adoption of new technology.

Creation and Delphi-method Refinement of Pediatric Disaster Triage Simulations

Abstract Objective. There is a need for rigorously designed pediatric disaster triage (PDT) training simulations for paramedics. First, we sought to design three multiple patient incidents for EMS provider training simulations. Our second objective was to determine the appropriate interventions and triage level for each victim in each of the simulations and develop evaluation instruments for each simulation. The final objective was to ensure that each simulation and evaluation tool was free of bias toward any specific PDT strategy. Methods. We created mixed-methods disaster simulation scenarios with pediatric victims: a school shooting, a school bus crash, and a multiple-victim house fire. Standardized patients, high-fidelity manikins, and low-fidelity manikins were used to portray the victims. Each simulation had similar acuity of injuries and 10 victims. Examples include children with special health-care needs, gunshot wounds, and smoke inhalation. Checklist-based evaluation tools and behaviorally anchored global assessments of function were created for each simulation. Eight physicians and paramedics from areas with differing PDT strategies were recruited as Subject Matter Experts (SMEs) for a modified Delphi iterative critique of the simulations and evaluation tools. The modified Delphi was managed with an online survey tool. The SMEs provided an expected triage category for each patient. The target for modified Delphi consensus was ≥85%. Using Likert scales and free text, the SMEs assessed the validity of the simulations, including instances of bias toward a specific PDT strategy, clarity of learning objectives, and the correlation of the evaluation tools to the learning objectives and scenarios. Results. After two rounds of the modified Delphi, consensus for expected triage level was >85% for 28 of 30 victims, with the remaining two achieving >85% consensus after three Delphi iterations. To achieve consensus, we amended 11 instances of bias toward a specific PDT strategy and corrected 10 instances of noncorrelation between evaluations and simulation. Conclusions. The modified Delphi process, used to derive novel PDT simulation and evaluation tools, yielded a high degree of consensus among the SMEs, and eliminated biases toward specific PDT strategies in the evaluations. The simulations and evaluation tools may now be tested for reliability and validity as part of a prehospital PDT curriculum.

Experiences with capnography in acute care settings: A mixed-methods analysis of clinical staff

PURPOSE Although capnography is being incorporated into clinical guidelines, it is not used to its full potential. We investigated reasons for limited implementation of capnography in acute care areas and explored facilitators and barriers to its implementation. METHODS A purposeful sample of physicians and nurses in emergency departments and intensive care units participated in semistructured interviews. Grounded theory, iterative data analysis, and the constant comparative method were used to analyze the data to inductively generate ideas and build theories. RESULTS Nineteen providers were interviewed from 5 hospitals. Six themes were identified: variability in use of capnography among acute care units, availability and accessibility of capnography equipment, the evidence behind capnography use, the impact of capnography on patient care, personal experiences impacting use of capnography, and variable knowledge about capnography. Barriers and facilitators to use were found within each theme. CONCLUSIONS We observed varied responsiveness to capnography and identified factors that work to foster or discourage its use. These data can guide future implementation strategies. A deliberate strategy to foster utilization, mitigate barriers, and broadly accelerate implementation has the potential to profoundly impact use of capnography in acute care areas with the goal of improving patient care.

The impact of limited English proficiency on asthma action plan use

Abstract Objective: The goal of this study was to compare rates of asthma action plan use by limited English proficiency (LEP) caregivers to English proficient (EP) caregivers. Methods: A cross-sectional bilingual survey was distributed at an urban, academic, pediatric emergency department (PED). Surveys were completed by adult caregivers of children with asthma who sought PED care for asthma related chief complaints. LEP was defined as caregiver ability to speak English less than “very well”. Data were analyzed using Fisher’s exact test and odds ratios (OR). Results: One hundred seven surveys were completed and analyzed. Fifty-one surveys (48%) were completed by LEP caregivers and 56 (52%) by EP caregivers. A 25% difference (p = .01) in action plan use rates between LEP caregivers (39%) and EP caregivers (64%) was observed. EP alone was associated with action plan use (OR 2.8 [95% CI 1.3–6.1]). Variables not associated with plan use included mother acting as caregiver (OR 2.1 [95% CI 0.7–7.0]), age of child >7 years (OR 1.0 [95% CI 0.5–2.4]), caregiver education ≥ associate degree (OR 1.4 [95% CI 0.6–3.0]), private insurance (OR 0.7 [95% CI 0.3–1.8]), White race (OR 0.7 [95% CI 0.2–2.2]), Latino ethnicity (OR 0.5 [95% CI 0.2–1.3]) and a federally qualified health center (OR 0.8 [95% CI 0.3–2.0]). The main caregiver reasons for plan use were feeling that a plan works/gets results, helps with symptom management and appreciation towards physician attentiveness when a plan is prescribed. The main caregiver reasons for non plan use were they were not informed/given an action plan or perceived the child’s asthma as mild/well controlled. Conclusion: Compared with EP caregivers, those with LEP experience disparate rates of asthma action plan use.

Use of emergency ultrasound in the diagnostic evaluation of an infant with vomiting.

The use of bedside emergency ultrasound in pediatric abdominal emergencies is becoming more widespread and can be a useful adjunct in the assessment of children who present with abdominal pain. Our case describes an infant who presented to the emergency department with vomiting, in whom an emergency ultrasound evaluation led to timely diagnosis and intervention of an unanticipated condition.