A Descriptive Analysis: Infants Presenting to the Pediatric Emergency Department With a Brief Resolved Unexplained Event.

OBJECTIVES: Infants presenting to pediatric emergency departments (EDs) after a choking episode, cyanotic event, or irregular breathing pattern are often diagnosed with a brief, resolved, unexplained event (BRUE). Social determinants of health may affect these patients; therefore, we aimed to define population demographics and determine significant demographic predictors between 2 cohorts-infants presenting with BRUE, and those admitted to the intensive care unit. METHODS: Using data from the Pediatric Health Information System (Children's Hospital Association, Washington, DC, Lenexa, KS), this multicenter, retrospective study included children aged 0-1 year from 52 hospitals who presented with an International Classification of Diseases-10 coded primary diagnosis for BRUE/apparent life-threatening event (ALTE) between January 1, 2016, and June 30, 2021. Cohort 1 patients presented to the ED with BRUE; cohort 2 patients were admitted from the ED for BRUE. Univariate and multivariate logistic regression were performed for both cohorts to discover possible demographic predictors. RESULTS: Overall, 24,027 patients were evaluated. Patient sex did not affect admission rates (odds ratio [OR] = 1.034; 95% confidence interval [CI], 0.982-1.089; P = 0.2051). Black race (OR = 1.252; 95% CI, 1.177-1.332; P < 0.0001) and Medicaid insurance (OR = 1.126; 95% CI, 1.065-1.19; P < 0.0001) were significantly associated with an increased risk of admission. "Other" race (OR = 0.837; 95% CI, 0.777-0.902; P < 0.0001) and commercial insurance were significantly associated with a greater likelihood of discharge (OR = 0.888; 95% CI, 0.84-0.939; P < 0.0001). CONCLUSIONS: Black race and Medicaid insurance predicted admission in this patient population, but demographics did not play a role in intensive care unit admission overall. Social determinants of health and demographics therefore appeared to play a role in admission for patients presenting to the ED. Future research could evaluate the effect of focused interventions, such as providing additional resources to socially at-risk families through community outreach, on admission rates of patients with these specific at-risk demographics.

Management of Croup in the Emergency Department: The Role of Multidose Nebulized Epinephrine.

OBJECTIVES: Croup occasionally requires medical intervention for respiratory distress. Mainstays of treatment are corticosteroids and nebulized epinephrine. Diagnosis and assessment of severity remain clinical. Safety of discharge from an emergency department (ED) after treatment with corticosteroids and 1 nebulized epinephrine has been established. No evidence exists regarding risk associated with discharge after multidose nebulized epinephrine. Many patients requiring multidose nebulized epinephrine are reflexively admitted. The purpose of this study was to provide a descriptive analysis of the current management of croup, specifically patients requiring multidose nebulized epinephrine. METHODS: The Pediatric Health Information System was used to extract information on patients diagnosed with croup age 0 to 11 years, evaluated in pediatric EDs from 2004 to 2014, who received corticosteroids and at least 1 nebulized epinephrine. We retrospectively assessed patients requiring multidose nebulized epinephrine, evaluating risk of return for additional care associated with discharges and reviewing admissions for markers of disease severity. RESULTS: A total of 95,403 patients were identified. Those requiring corticosteroids and multidose nebulized epinephrine (N = 8084) were less likely to return for further care if discharged from the ED (5.4% return single dose, 0.8% return multidose: P < 0.0001) and were admitted at a higher rate (10.7% admission single dose, 70.5% admission multidose: P < 0.0001). Of those admitted, only 31.7% received more than 2 treatments. CONCLUSIONS: Patients requiring single-dose nebulized epinephrine are managed differently than those requiring multidose nebulized epinephrine. There is likely a role for multidose nebulized epinephrine in the outpatient management of croup. A prospective study is needed.

Cerebral oximetry with blood volume index and capnography in intubated and hyperventilated patients.

OBJECTIVE: Hyperventilation-induced hypocapnia leads to cerebral vasoconstriction and hypoperfusion. Intubated patients are often inadvertently hyperventilated during resuscitations, causing theoretical risk for ischemic brain injury. Current emergency department monitoring systems do not detect these changes. The purpose of this study was to determine if cerebral oximetry (rcSo2) with blood volume index (CBVI) would detect hypocapnia-induced cerebral tissue hypoxia and hypoperfusion. METHODS: Patients requiring mechanical ventilation underwent end-tidal CO2 (ETco2), rcSo2, and CBVI monitoring. Baseline data was analyzed and then the effect of varying ETco2 on rcSo2 and CBVI readings was analyzed. Median rcSo2 and CBVI values were compared when above and below the ETco2 30 mmHg threshold. Subgroup analysis and descriptive statistics were also calculated. RESULTS: Thirty-two patients with neurologic emergencies and potential increased intracranial pressure were included. Age ranged from 6 days to 15 years (mean age, 3.1 years; SD, 3.9 years; median age, 1.5 years: 0.46-4.94 years). Diagnoses included bacterial meningitis, viral meningitis, and seizures. ETco2 crossed 30 mm Hg 80 times. Median left and right rcSO2 when ETCO2 was below 30 mmhg was 40.98 (35.3, 45.04) and 39.84 (34.64, 41) respectively. Median left and right CBVI when ETCO2 was below 30 mmhg was -24.86 (-29.92, -19.71) and -22.74 (-27.23, - 13.55) respectively. Median left and right CBVI when ETCO2 was below 30 mmHg was -24.86 (-29.92, -19.71) and -22.74 (-27.23, -13.55) respectively. Median left and right rcSO2 when ETCO2 was above 30 mmHg was 63.53 (61.41, 66.92) and 63.95 (60.23, 67.58) respectively. Median left and right CBVI when ETCO2 was above 30 mmHg was 12.26 (0.97, 20.16) and 8.11 (-0.2, 21.09) respectively. Median duration ETco2 was below 30 mmHg was 17.9 minutes (11.4, 26.59). Each time ETco2 fell below the threshold, there was a significant decrease in rcSo2 and CBVI consistent with decreased cerebral blood flow. While left and right rcSO2 and CBVI decreased quickly once ETCO2​ was below 30 mmHg, increase once ETCO2​ was above 30 mmHg was much slower. CONCLUSION: This preliminary study has demonstrated the ability of rcSo2 with CBVI to noninvasively detect the real-time effects of excessive hyperventilation producing ETco2 < 30 mmHg on cerebral physiology in an emergency department. We have demonstrated in patients with suspected increased intracranial pressure that ETco2 < 30 mmHg causes a significant decrease in cerebral blood flow and regional tissue oxygenation.