Rapid, free-breathing non-contrast MRI for first-line imaging evaluation of ovarian torsion in the emergency department.

BACKGROUND: Transabdominal ultrasound (US) is first-line imaging to evaluate ovaries in girls presenting to the emergency department (ED) with suspected ovarian torsion. Ovaries may be difficult to visualize sonographically; therefore, prompt diagnosis using US alone can be challenging. Rapid MRI as first-line imaging may help streamline patient throughput, especially with increasing MRI availability in the ED. OBJECTIVE: To assess feasibility of rapid MRI for diagnosis of ovarian torsion. MATERIALS AND METHODS: A retrospective, single-center IRB approved study of MRI performed in female pediatric patients presenting with abdominopelvic pain from August 2022 to January 2023. Imaging occurred according to one of three clinical pathways (US-first approach vs MRI-first approach vs US + MRI-second-line approach). A rapid three-sequence free-breathing MRI protocol was utilized. Frequency of ovarian torsion and secondary diagnoses was recorded. Length of MR scan time, time from ED arrival to time of diagnosis, and whether patient had US prior to MR exam were obtained. A historical cohort of patients with US only performed for assessment of ovarian torsion were evaluated for length of the US examination and time from ED arrival to time of diagnosis. Intervals were compared using the uncorrected Fisher's least significant difference and Turkey's multiple comparison tests. RESULTS: A total of 140 MRI exams (mean age 14.6 years) and 248 historical US exams (mean age 13.5 years) were included. Of the patients with MRI, 41 (29%) patients were imaged with US + MRI and 99 (71%) imaged with MRI only; 4% (6/140) MR exams were suspicious for ovarian torsion, with one true positive case (1/6 TP) and 5 false positive cases (5/6 FP); 26.4% (37/140) of exams had secondary diagnoses. Median MRI scan time was 11.4 min (4.4) vs median historical US scan time was 24.1 min (19.7) (P<0.001). Median time from arrival in ED to MRI read was 242 (140). Median time from arrival in ED to US only read was 268 min (148). This was not a statistically significant difference when compared to the MRI only cohort. CONCLUSION: First-line MRI imaging for evaluation of ovarian torsion is a rapid and feasible imaging modality for female patients in the emergent setting.

Dexamethasone Versus Prednisone in Children Hospitalized With Asthma Exacerbation.

OBJECTIVES: Dexamethasone is increasingly used for the management of children hospitalized with asthma in place of prednisone, yet data regarding the effectiveness of dexamethasone in children with asthma exacerbation severe enough to require hospitalization are limited. Our objective is to compare the effectiveness of dexamethasone versus prednisone in children hospitalized with an asthma exacerbation on 30-day reutilization. METHODS: We conducted a retrospective cohort study at an urban, quaternary children's hospital of children aged 4 to 17 years, hospitalized from January 1, 2014 to December 31, 2017, with a primary discharge diagnosis of asthma. A covariate-balanced propensity score was derived to account for physician discretion in steroid selection. A generalized linear model, including inverse probability treatment weighting, was used to detect differences in 30-day return utilization (unplanned readmission or emergency department visit) between children whose first dose of corticosteroid was dexamethasone versus prednisone. RESULTS: Inclusion criteria were met by 1161 patients, of which 510 (44%) first received dexamethasone versus 651 (56%) who first received prednisone. The total cohort had a mean age of 8.5 years (SD 3.4). The covariate-balanced cohort had no significant differences in demographic characteristics or illness severity between groups. The dexamethasone group had a return utilization of 3.9% (20 of 510) versus 2.2% (14 of 651) for children treated with prednisone. The propensity score-adjusted analysis revealed the steroid treatment was not found to significantly affect the 30-day reutilization (adjusted odds ratio [aOR] 1.61; 95%CI 0.80-3.31). CONCLUSIONS: The initial steroid choice (dexamethasone versus prednisone) was not associated with 30-day reutilization after hospitalization for an asthma exacerbation.

Standardized Headache Therapy in the Pediatric Emergency Department Using Improvement Methodology.

INTRODUCTION: Primary headache is a common cause of pediatric emergency department (PED) visits. Without published guidelines to direct treatment options, various strategies lacking evidence are often employed. This study aims to standardize primary headache treatment in the PED by promoting evidence-based therapies, reducing nonstandard abortive therapies, and introducing dihydroergotamine (DHE) into practice. METHODS: A multidisciplinary team developed key drivers, created a clinical care algorithm, and updated electronic medical record order sets. Outcome measures included the percentage of patients receiving evidence-based therapies, nonstandard abortive therapies, DHE given after failed first-line therapies, and overall PED length of stay. Process measures included the percent of eligible patients with the order set usage and medications received within 90 minutes. Balancing measures included hospital admissions and returns to the PED within 72 hours. Annotated control charts depicted results over time. RESULTS: We collected data from July 2017 to December 2019. The percent of patients receiving evidence-based therapies increased from 69% to 73%. The percent of patients receiving nonstandard abortive therapies decreased from 2.5% to 0.6%. The percent of patients receiving DHE after failed first-line therapies increased from 0% to 37.2%. No untoward effects on process or balancing measures occurred, with sustained improvement for 14 months. CONCLUSION: Standardization efforts for patients with primary headaches led to improved use of evidence-based therapies and reduced nonstandard abortive therapies. This methodology also led to improved DHE use for migraine headache resistant to first-line therapies. We accomplished these results without increasing length of stay, admission, or return visits.

Improving Administration of Prehospital Corticosteroids for Pediatric Asthma.

Early administration of systemic corticosteroids for asthma exacerbations in children is associated with improved outcomes. Implementation of a new emergency medical services (EMS) protocol guiding the administration of systemic corticosteroids for pediatric patients with asthma exacerbations went into effect in January 2016 in Southwest Ohio. Our SMART aim was to increase the proportion of children receiving systemic prehospital corticosteroids for asthma exacerbations from 0% to 70% over 2 years. METHODS: Key drivers were derived and tested using multiple plan-do-study-act cycles. Interventions included community EMS outreach and education, improved clarity in the prehospital protocol language, distribution of pocket-sized educational cards, and ongoing individualized EMS agency feedback on protocol adherence. Eligible patients included children age 3-16 years, who were transported by EMS to the pediatric emergency department with diagnoses consistent with asthma exacerbation. Manual chart review assessed eligibility to receive prehospital corticosteroids. Statistical process control charts tracked adherence to corticosteroid recommendations. RESULTS: A total of 256 encounters met the criteria for receiving prehospital corticosteroids for pediatric asthma exacerbations between January 1, 2016, and April 30, 2019. Special cause variation was demonstrated following education at high-volume EMS stations, and the centerline shifted to 34%. This shift has been sustained for 28 months. CONCLUSION: Improvement methodology increased prehospital corticosteroid administration for pediatric asthma exacerbations, although we failed to achieve our aim of increasing use to 70%. Many barriers exist in pediatric prehospital protocol implementation, many of which can be improved with quality improvement tools.

High-Flow Nasal Cannula in Bronchiolitis at a Pediatric Emergency Department: Trends and Outcomes.

OBJECTIVES: Use of high-flow nasal cannula (HFNC) for bronchiolitis has increased, but data describing the current use and impact of this therapy are limited. Our objective with this study was to describe the use of HFNC for bronchiolitis in a pediatric emergency department (ED) from 2013 to 2019 and to explore associations with clinical outcomes. METHODS: This was a retrospective cohort study of children aged 2 to 24 months with the diagnosis of bronchiolitis. The primary outcome was HFNC initiation in the ED. Secondary outcomes included admission rate, ICU (PICU) admission, transfer to PICU from floor, and endotracheal intubation. An adjusted interrupted times series analysis was performed to analyze changes in rates of primary and secondary outcomes over time. RESULTS: In total 11 149 children met inclusion criteria; 902 (8.1%) were initiated on HFNC. The rate of HFNC initiation increased from 1.3% in 2012-2013 to 17.0% in 2018-2019 (P trend ≤ .001). Less than 30% of children initiated on HFNC were hypoxic. There were no significant changes over time in rates of hospital admission, PICU admission, or PICU transfer, adjusting for clinical severity, seasonality, and provider variation. Intubation rate increased over the study period. CONCLUSIONS: We found a 13-fold increase in HFNC use over a 6-year period with no evidence of improvement in clinically meaningful outcomes. Clinical benefit should be clearly defined before further expansion of the use of HFNC for bronchiolitis in the ED.

Evaluation for Neonatal HSV in Infants Undergoing Workup for Serious Bacterial Infection: A 5-Year Retrospective Review.

OBJECTIVES: To describe the characteristics of infants evaluated for serious bacterial infection, focusing on empirical testing and treatment of herpes simplex virus (HSV) and describe the characteristics of HSV-positive patients. METHODS: We included infants aged 0 to 60 days undergoing evaluation for serious bacterial infection in the emergency department. This descriptive study was conducted between July 2010 and June 2014 at a tertiary-care children's hospital. Eligible patients were identified on the basis of age at presentation to the hospital and laboratory specimens. Infant characteristics, symptoms on presentation, and laboratory workup were compared between HSV-positive and HSV-negative patients by using the 2-sample t test or the Wilcoxon rank test. RESULTS: A total of 1633 infants were eligible for inclusion, and 934 (57.2%) were 0 to 28 days of age. HSV was diagnosed in 19 infants, 11 of whom had disseminated disease. Compared with those without HSV, HSV-positive infants were younger, less likely to be febrile and to present with nonspecific symptoms, and more likely to have a mother with HSV symptoms (P < .05). Testing from all recommended locations was only performed in 22% of infants. Infants tested or empirically treated with acyclovir had a longer median length of stay compared with children who were not tested or treated (P < .01). CONCLUSIONS: The absence of fever should not preclude a workup for HSV in neonates, and when a workup is initiated, emphasis should be placed on obtaining samples from serum, cerebrospinal fluid, and surface specimens. Physicians may benefit from a guideline for evaluation of HSV with specific guidance on high-risk features of presentation and recommended testing.

Using Quality Improvement to Implement a Standardized Approach to Neonatal Herpes Simplex Virus.

OBJECTIVES: Neonatal herpes simplex virus (HSV) infections are associated with high mortality and long-term morbidity. However, incidence is low and acyclovir, the treatment of choice, carries risk of toxicity. We aimed to increase the percentage of patients 0 to 60 days of age who are tested and treated for HSV in accordance with local guideline recommendations from 40% to 80%. METHODS: This quality improvement project took place at 1 freestanding children's hospital. Multiple plan-do-study-act cycles were focused on interventions aimed at key drivers including provider buy-in, guideline availability, and accurate identification of high-risk patients. A run chart was used to track the effect of interventions on the percentage managed per guideline recommendations over time by using established rules for determining special cause. Pre- and postimplementation acyclovir use was compared by using a χ2 test. In HSV-positive cases, delayed acyclovir initiation, defined as >1 day from presentation, was tracked as a balancing measure. RESULTS: The median percentage of patients managed according to guideline recommendations increased from 40% to 80% within 8 months. Acyclovir use decreased from 26% to 7.9% (P < .001) in non-high-risk patients but did not change significantly in high-risk patients (73%-83%; P = .15). There were no cases of delayed acyclovir initiation in HSV-positive cases. CONCLUSIONS: Point-of-care availability of an evidence-based guideline and interventions targeted at provider engagement improved adherence to a new guideline for neonatal HSV management and decreased acyclovir use in non-high-risk infants. Further study is necessary to confirm the safety of these recommendations in other settings.

Improving Emergency Department Care for Pediatric Victims of Sexual Abuse.

BACKGROUND AND OBJECTIVE: Evidence-based medical care of sexual abuse victims who present to the pediatric emergency department (PED) is necessary to facilitate forensic evidence collection and prevent pregnancy and sexually transmitted infections. Adherence to testing and treatment guidelines remains low in PEDs, despite recommendations from the American Academy of Pediatrics and Centers for Disease Control and Prevention. We aimed to increase the proportion of patient encounters at a PED for reported sexual abuse that receive algorithm-adherent care from 57% to 90% within 12 months. METHODS: Our team of PED and child abuse pediatricians outlined our theory for improvement, and multiple plan-do-study-act cycles were conducted to test interventions that were aimed at key drivers. Interventions included the construction of a best practice algorithm derived from published guidelines, targeted clinician education, and integration of an electronic order set. Our primary outcome was the proportion of patient encounters in which care adhered to algorithm recommendations. Data were abstracted from the records of all patient encounters evaluated in the PED for reported sexual abuse. RESULTS: We analyzed 657 visits between July 2015 and January 2018. The proportion of patient encounters with algorithm-adherent care improved from 57% to 87% during the study period. This improvement has been sustained for 13 months. Failure to test for hepatitis and syphilis constituted the majority of nonadherent care. CONCLUSIONS: Using improvement methodology, we successfully increased algorithm-adherent evaluation and management of patients presenting for sexual abuse. Targeted education and an electronic order set were associated with improved adherence to a novel care algorithm.

Guideline Adoption for Community-Acquired Pneumonia in the Outpatient Setting.

BACKGROUND: The Pediatric Infectious Diseases Society and Infectious Diseases Society of America national childhood community-acquired pneumonia (CAP) guideline encouraged the standard evaluation and treatment of children who were managed as outpatients. Our objectives were to (1) increase adherence to guideline-recommended diagnostics and antibiotic treatment of CAP at 5 pediatric primary care practices (PPCPs) by using quality-improvement methods and (2) evaluate the association between guideline adherence and unscheduled follow-up visits. METHODS: Immunocompetent children >3 months of age with no complex chronic conditions and who were diagnosed with CAP were eligible for inclusion in this stepped-wedge study. Interventions were focused on education, knowledge of colleagues' prescribing practices, and feedback sessions. Statistical process control charts were used to assess changes in recommendations and antibiotic treatment. Unscheduled follow-up visits were compared across time by using generalized estimating equations that were clustered by PPCP. RESULTS: CAP was diagnosed in 1906 children. Guideline recommended therapy and pulse oximetry use increased from a mean baseline of 24.9% to a mean of 68.0% and from 4.3% to 85.0%, respectively, over the study period. Among children >5 years of age, but not among those who were younger, the receipt of guideline recommended antibiotics, as compared with nonguideline therapy, was associated with the increased likelihood of unscheduled follow-up (adjusted odds ratio, 2.12; 95% confidence interval: 1.31-3.43). Chest radiographs and complete blood cell counts were rarely performed at baseline. CONCLUSIONS: Recommendations for limited use of chest radiographs and complete blood cell counts and standardized antibiotic therapy in children is supported at PPCPs. However, the guideline may need to include macrolide monotherapy as appropriate antibiotic therapy for older children.

Standardizing the Evaluation of Nonaccidental Trauma in a Large Pediatric Emergency Department.

BACKGROUND AND OBJECTIVES: Variability exists in the evaluation of nonaccidental trauma (NAT) in the pediatric emergency department because of misconceptions and individual bias of clinicians. Further maltreatment, injury, and death can ensue if these children are not evaluated appropriately. The implementation of guidelines for NAT evaluation has been successful in decreasing differences in care as influenced by race and ethnicity of the patient and their family. Our Specific, Measurable, Achievable, Realistic, and Timely aim was to increase the percent of patients evaluated in the emergency department for NAT who receive guideline-adherent evaluation from 47% to 80% by December 31, 2016. METHODS: The team determined key drivers for the project and tested them by using multiple plan-do-study-act cycles. Interventions included construction of a best practice guideline, provider education, integration of the guideline into workflow, and order set construction to support guideline recommendations. Data were compiled from electronic medical records to identify patients <3 years of age evaluated in the pediatric emergency department for suspected NAT based on chart review. Adherence to guideline recommendations for age-specific evaluation (<6, 6-12, and >12-36 months) was tracked over time on statistical process control charts to evaluate the impact of the interventions. RESULTS: A total of 640 encounters had provider concern for NAT and were included in the analysis. Adherence to age-specific guideline recommendations improved from a baseline of 47% to 69%. CONCLUSIONS: With our improvement methodology, we successfully increased guideline-adherent evaluation for patients with provider concern for NAT. Education and electronic support at the point of care were key drivers for initial implementation.

Laryngeal Injury in a Male Lacrosse Player: A Case for Prevention.

Lacrosse has become increasingly popular among US children and teens. Because a lacrosse ball can serve as a projectile, neck injuries, although uncommon, can cause a severe and long-lasting injury. We report the case of a 16-year-old adolescent who experienced direct neck trauma while playing lacrosse. The clinical presentation, treatment strategies, and intubation considerations are reviewed. Finally, a call to action to prevent future, similar injuries is discussed.

Long-Term Sustainability of Timely Emergency Department Analgesia for Fractures: A Time Series Study.

OBJECTIVES: To determine the long-term sustainability and unintended consequences of a quality improvement project to improve the timeliness of intravenous (IV) opioid administration to patients with long-bone extremity fractures within a dynamic pediatric emergency department. METHODS: A retrospective study of patients with long-bone extremity fractures was conducted using electronic medical record data from 2007 to 2014. The primary outcome was the percentage of patients receiving timely IV opioids. Control charts and time series models were used to determine if changes in the clinical microenvironment were associated with shifts in the outcome measure. Unintended consequences included patients receiving potentially avoidable IVs and use of the quality improvement process for patients without long-bone extremity fractures. RESULTS: Improved timeliness of IV opioids was sustained. The type of physician who staffed the process and optimization of faculty staffing hours were associated with a 9.6% decrease and 11.8% increase in timely IV opioids, respectively. Implementation of the IV opioid process was not associated with increased placement of potentially avoidable IVs. Of patients receiving the IV opioid process, 22% did not have a long-bone extremity fracture, of whom 91% were diagnosed with a different painful injury. CONCLUSION: Sustainability of IV opioid timeliness was robust, despite changes in the clinical microenvironment. Changes in physician staffing and responsibilities in a pediatric emergency department may be especially important to consider when planning future improvement initiatives. Our findings support the importance of higher reliability interventions, such as identification and utilization of existing patterns of behavior, as high yield for sustaining outcomes.

Improvement methodology increases guideline recommended blood cultures in children with pneumonia.

BACKGROUND AND OBJECTIVE: A national evidence-based guideline for the management of community-acquired pneumonia (CAP) in children recommends blood cultures for patients admitted with moderate to severe illness. Our primary aim was to increase ordering of blood cultures for children hospitalized with CAP from 53% to 90% in 6 months. The secondary aim was to evaluate the effect of obtaining blood cultures on length of stay (LOS). METHODS: At a tertiary children's hospital, interventions to increase blood cultures focused on 3 key drivers and were tested separately in the emergency department and inpatient units by using multiple plan-do-study-act cycles. The impact of the interventions was tracked over time on run charts. The association of ordering blood cultures and LOS was estimated by using linear regression models. RESULTS: Within 6 months, the percentage of patients admitted with CAP who had blood cultures ordered increased from 53% to 100%. This change has been sustained for 12 months. Overall, 239 (79%) of the 303 included patients had a blood culture ordered; of these, 6 (2.5%) were positive. Patients who had a blood culture did not have an increased LOS compared with those without a blood culture. CONCLUSIONS: Quality improvement methods were used to increase adherence to evidence-based national guidelines for performing blood cultures on children hospitalized with CAP; LOS did not increase. These results support obtaining blood cultures on all patients admitted with CAP without negative effects on LOS in a setting with a reliably low false-positive blood culture rate.

Hospital outcomes associated with guideline-recommended antibiotic therapy for pediatric pneumonia.

BACKGROUND: Recent national guidelines recommend use of narrow-spectrum antibiotic therapy as empiric treatment for children hospitalized with community-acquired pneumonia (CAP). However, clinical outcomes associated with adoption of this recommendation have not been studied. METHODS: This retrospective cohort study included children age 3 months to 18 years, hospitalized with CAP from May 2, 2011 through July 30, 2012. Primary exposure of interest was empiric antibiotic therapy, classified as guideline recommended or not. Primary outcomes were length of stay (LOS), total hospital costs, and inpatient pharmacy costs. Secondary outcomes included broadened antibiotic therapy, emergency department revisits, and readmissions. Multivariable linear regression and Fisher exact test were performed to determine the association of guideline-recommended antibiotic therapy on outcomes. RESULTS: Empiric guideline-recommended therapy was prescribed to 168 (76%) of 220 patients. Median hospital LOS was 1.3 days (interquartile range [IQR]: 0.9-1.9 days), median total cost of index hospitalization was $4097 (IQR: $2657-$6054), and median inpatient pharmacy cost was $91 (IQR: $40-$183). Between patients who did and did not receive guideline-recommended therapy, there were no differences in LOS (adjusted -5.8% change; 95% confidence interval [CI]: -22.1 to 12.8), total costs (adjusted -10.9% change; 95% CI: -27.4 to 9.4), or inpatient pharmacy costs (adjusted 14.8% change; 95% CI: -43.4 to 27.1). Secondary outcomes were rare, with no difference in unadjusted analysis between patients who did and did not receive guideline-recommended therapy. CONCLUSIONS: Use of guideline-recommended antibiotic therapy was not associated with unintended negative consequences; there were no changes in LOS, total costs, or inpatient pharmacy costs.

Comparison of emergency care delivered to children and young adults with complex chronic conditions between pediatric and general emergency departments.

OBJECTIVES: Increasing attention is being paid to medically complex children and young adults, such as those with complex chronic conditions, because they are high consumers of inpatient hospital days and resources. However, little is known about where these children and young adults with complex chronic conditions seek emergency care and if the type of emergency department (ED) influences the likelihood of admission. The authors sought to generate nationwide estimates for ED use by children and young adults with complex chronic conditions and to evaluate if being of the age for transition to adult care significantly affects the site of care and likelihood of hospital admission. METHODS: This was a cross-sectional study using discharge data from the 2008 Nationwide Emergency Department Sample (NEDS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality to evaluate visits to either pediatric or general EDs by pediatric-aged patients (17 years old or younger) and transition-aged patients (18 to 24 years old) with at least one complex chronic condition. The main outcome measures were hospital admission, ED charges for treat-and-release visits, and total charges for admitted patients. RESULTS: In 2008, 69% of visits by pediatric-aged and 92% of visits by transition-aged patients with multiple complex chronic conditions occurred in general EDs. Not surprisingly, pediatric age was the strongest predictor of seeking care in a pediatric ED (odds ratio [OR] = 15.86; 95% confidence interval [CI] = 12.3 to 20.5). Technology dependence (OR = 1.56; 95% CI =1.2 to 2.0) and presence of multiple complex chronic conditions (OR = 1.39; 95% CI = 1.2 to 1.6) were also associated with higher odds of seeking care in a pediatric ED. When controlling for patient and hospital characteristics, type of ED was not a significant predictor of admission (p = 0.87) or total charges (p = 0.26) in either age group. CONCLUSIONS: Overall, this study shows that, despite their complexity, the vast majority of children and young adults with multiple complex chronic conditions are cared for in general EDs. When controlling for patient and hospital characteristics, the admission rate and total charges for hospitalized patients did not differ between pediatric and general EDs. This result highlights the need for increased attention to the care that these medically complex children and young adults receive outside of pediatric-specialty centers. These results also emphasize that any future performance metrics developed to evaluate the quality of emergency care for children and young adults with complex chronic conditions must be applicable to both pediatric and general ED settings.

Quality improvement methods increase appropriate antibiotic prescribing for childhood pneumonia.

OBJECTIVE: In August 2011, the Pediatric Infectious Disease Society and Infectious Disease Society of America published an evidence-based guideline for the management of community-acquired pneumonia (CAP) in children ≥3 months. Our objective was to evaluate if quality improvement (QI) methods could improve appropriate antibiotic prescribing in a setting without a formal antimicrobial stewardship program. METHODS: At a tertiary children's hospital, QI methods were used to rapidly implement the Pediatric Infectious Disease Society/Infectious Disease Society of America guideline recommendations for appropriate first-line antibiotic therapy in children with CAP. QI interventions focused on 4 key drivers and were tested separately in the emergency department and on the hospital medicine resident teams, using multiple plan-do-study-act cycles. Medical records of eligible patients were reviewed weekly to determine the success of prescribing recommended antibiotic therapy. The impact of these interventions on our outcome was tracked over time on run charts. RESULTS: Appropriate first-line antibiotic prescribing for children admitted with the diagnosis of CAP increased in the emergency department from a median baseline of 0% to 100% and on the hospital medicine resident teams from 30% to 100% within 6 months of introducing the guidelines locally at Cincinnati Children's Hospital Medical Center and has been sustained for 3 months. CONCLUSIONS: Our study demonstrates that QI methods can rapidly improve adherence to national guidelines even in settings without a formal antimicrobial stewardship program to encourage judicious antibiotic prescribing for CAP.

Return visit characteristics among patients who leave without being seen from a pediatric ED.

OBJECTIVES: The primary aim of this study was to evaluate for differences in acuity level and rate of admission on return visit between patients who leave without being seen (LWBS) and those who are initially evaluated by a physician. Our secondary aim was as well as to identify predictors of which LWBS patients will return to the ED with high acuity or require admission. METHODS: A cross-sectional study using an administrative database at an academic tertiary-care pediatric hospital in the United States from January 1, 2006, to December 31, 2008 was done. RESULTS: There were 3525 patients who LWBS during the study period (1.2% of total ED visits). Of these, 87% were triaged as nonurgent, and 13% as urgent at their initial visit. Two hundred eighty-nine (8%) of LWBS patients returned to the ED within 48 hours. Compared with the population who returned to the ED after previous evaluation, patients who LWBS from their initial visit and returned had significantly lower odds of urgent acuity at time of return visit (odds ratio [OR], 0.22; 95% confidence interval [CI], 0.15-0.32) and of being admitted (OR, 0.58; 95% CI, 0.40-0.84). Urgent acuity at initial visit (OR, 2.86; 95% CI, 1.35-6.04) and number of ED visits in last 6 months (OR, 1.24; 95% CI, 1.02-1.52) were significant predictors of admission at return visit among the LWBS population. CONCLUSIONS: Generally, patients who LWBS from a pediatric ED were unlikely to return for ED care, and those who did were unlikely to either be triaged as urgent or require hospital admission. This study showed that urgent acuity during the initial visit and number of previous ED visits were significant predictors of admission on return. Identification of these predictors may allow a targeted intervention to ensure follow-up of patients who meet these criteria after they LWBS from the pediatric ED.