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Date: November 21st, 2016
Reference: Eisenbrown et al. Which Febrile Children with Sickle Cell Disease Need a Chest X-Ray? AEM November 2016
Guest Skeptic: Dr. Corey Heitz is an associate professor of emergency medicine at the Virginia Tech Carilion School of Medicine in Roanoke Virginia. He is also the CME editor for Academic Emergency Medicine and the associate editor for emergency medicine simulation at the AAEM MedEdPORTAL.
Case: You are working in the Emergency Department on an overnight pediatric coverage shift. A worried mother brings her 2-year-old child in with a fever of 38.6C (that’s 101.5F). The female child’s medical history is significant for sickle cell disease. On exam, the child is uncomfortable appearing, tachycardic, tachypnic and febrile. Mom says the child has had a runny nose and a mild cough along with the fever.
Background: Children with sickle cell disease who develop fever are at higher risk of severe bacterial infection than children without sickle cell disease. The National Heart, Lung, and Blood Institute (NHLBI) suggest a routine workup that includes a CBC, blood cultures, and empiric antibiotics (NHLBI Expert Panel Report 2014).
One of the life-threatening infections for which these children are most at risk is acute chest syndrome (ACS). The NHLBI recommend a chest x-ray (CXR) for children with respiratory signs or symptoms (shortness of breath, tachypnea, cough, and/or rales).
Controversy exists as to whether the history and physical exam are sensitive enough to determine which febrile children need a CXR.
Clinical Question: Which febrile children with sickle cell disease presenting to the emergency department should get a CXR to help diagnose acute chest syndrome?
Reference: Eisenbrown et al. Which Febrile Children with Sickle Cell Disease Need a Chest X-Ray? AEM November 2016.
* Population: Children age three months to 21 years with sickle cell disease presenting to one of two children’s emergency departments with a fever of 38.4C or greater.
* Intervention: Accuracy of white blood cell count, history and physical exam findings to rule-in or rule-out acute chest syndrome.
* Comparison: None
* Outcome:
* Primary Outcome: Presence of acute chest syndrome.
* Secondary Outcomes: Classification and regression tree (CART) analysis, sensitivity, specificity, positive and negative likelihood ratios of constellations of WBC, history/physical exam findings for acute chest syndrome.
The SGEM HOP episodes always have one of the authors on the show. Dr. David Brousseau is a Pediatric Emergency medicine physician at the Children’s Hospital of Wisconsin.
Author’s Conclusions: Children with SCD presenting to the ED with fever and shortness of breath, tachypnea, cough, rales, or chest pain should receive a CXR due to high ACS rates. A higher WBC count or history of ACS in a child without one of those symptoms may suggest the need for a CXR. Prospective validation of these criteria is needed.
Quality Checklist for Clinical Decision Tools:
* The study population included or focused on those in the ED. Yes
* The patients were representative of those with the problem. Yes
* All important predictor variables and outcomes were explicitly specified. Yes
* This is a prospective, multicenter study including a broad spectrum of patients and clini...