Comparison of Procalcitonin With Commonly Used Biomarkers and Algorithms for Evaluating Suspected Pediatric Musculoskeletal Infection in the Emergency Department.

INTRODUCTION: It is difficult to distinguish between children with infectious versus noninfectious conditions of the musculoskeletal system during initial evaluation. Clinical predictive algorithms potentially support this effort but not without limitations. Procalcitonin (PCT) has been proposed as a biomarker to help differentiate infection from noninfection. This study evaluates the adoption and utility of PCT during initial infection evaluations and assesses test characteristics of commonly used parameters and algorithms. METHODS: PCT was introduced for initial laboratory evaluation of the suspected musculoskeletal infection. Prospective enrollment occurred from July 2020 to November 2021 with 3 cohorts established after a retrospective review of final diagnoses at the end of treatment: 1) deep infection, 2) superficial infection, and 3) noninfection. Univariate and multivariate logistic regression analysis of parameters and diagnoses was performed. Test characteristics of individual and aggregated parameters were assessed. RESULTS: Among 258 children evaluated, 188 (72.9%) had PCT drawn during the evaluation. An increase of PCT acquisition from 67.8% to 82.4% occurred over the study timeframe. Eighty-five children were prospectively studied, including those with deep infection (n=21); superficial infection (n=10), and noninfection (n=54). Test characteristics of parameters showed accuracy ranging from 48.2% to 85.9%. PCT >0.1 ng/mL independently predicted deep infection in 84.7% of cases, outperforming white blood cell, C-reactive protein (CRP), and absolute neutrophil count. Using study thresholds for CRP, erythrocyte sedimentation rate, PCT, and Temp improved accuracy to 89.4%. CONCLUSIONS: PCT is a potentially useful biomarker during the initial assessment of children suspected to have a musculoskeletal infection. Systematic evaluation using a combination of parameters improves the accuracy of assessment and assists predictive judgment under uncertainty. PCT <0.1 ng/mL, erythrocyte sedimentation rate <18 mm/hr, CRP <3.3 mg/dL, and temperature <37.8°C should reasonably reassure clinicians that deep musculoskeletal infection is less likely, given the high negative predictive value and collective accuracy of these parameters. LEVEL OF EVIDENCE: Level III - Retrospective cohort comparison.

Virtual Interviewing for Pediatric Emergency Medicine Fellowship-A National Survey.

OBJECTIVE: This study aimed to evaluate both applicant and interviewer satisfaction with the virtual interviewing process for pediatric emergency medicine (PEM) fellowship in hopes to improve the fellowship interviewing process. It was proposed that fellowship programs and applicants would prefer virtual interviews over traditional interviews. METHODS: A survey developed in collaboration with UT Southwestern PEM fellowship leaders and national PEM leaders was sent to all PEM fellowship applicants and programs at the conclusion of the 2020 interview season and rank list submission. The applicant survey obtained information on ease of virtual interviews and whether applicants felt that they obtained adequate information from virtual interviews to make informed program selections. Program director surveys collected data on thoughts and feelings about virtual interviews and obstacles encountered during the recruitment season. Both surveys asked about costs for interviews and interview type preference. RESULTS: A response rate of 49% from applicants and 47% from programs was obtained. Virtual interview days were similar in the amount of time and staff hours used compared with traditional days. Applicants spent less on virtual interviews compared with those who underwent traditional interviews (average $725 vs $4312). Programs received more applications than the prior year and spent less money during the virtual cycle. The majority of the applicants (90%) were comfortable with the virtual interview platform, and most (66%) agreed that virtual interviews provided adequate information to determine program rank. Geography was the number 1 rank determining factor. Programs and applicants preferred a form of in-person interviews. CONCLUSIONS: Virtual interviews provide cost savings for both applicants and programs. Despite this, both parties prefer a form of in-person interviews.