Calc Function

    • Calcs that help predict probability of a diseaseDiagnosis
    • Subcategory of 'Diagnosis' designed to be very sensitiveRule Out
    • Disease is diagnosed: prognosticate to guide treatmentPrognosis
    • Numerical inputs and outputsFormula
    • Med treatment and moreTreatment
    • Suggested protocolsAlgorithm





    Chief Complaint


    Organ System


    Patent Pending

    Palchak (UC Davis) Rule for Pediatric Head Trauma

    Identifies children at low risk for brain injuries after blunt head trauma.


    Note: We recommend using PECARN over other pediatric head trauma rules, as it is the most widely validated.
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    If any of the following is present, then the patient is NOT low risk for brain injury:

    1. Abnormal mental status
    2. Clinical signs of skull fracture
    3. History of vomiting
    4. Scalp hematoma (in children ≤2 years of age)
    5. Headache
    Dr. Michael J. Palchak

    About the Creator

    Michael J. Palchak, MD, is an emergency medicine physician at Sutter Davis Hospital in Emeryville, California. He has been in practice for 20 years. Dr. Palchak’s primary research interest is management of pediatric blunt head trauma.

    To view Dr. Michael J. Palchak's publications, visit PubMed

    Dr. Nate Kuppermann

    About the Creator

    Nate Kuppermann, MD, MPH, is a professor and chair of the emergency medicine department at UC Davis Children’s Hospital. He chaired the first research network in PEM and was a founding chair of the Pediatric Emergency Care Applied Research Network (PECARN). Dr. Kuppermann is a leading national investigator for studies focusing on infectious emergencies in children including the laboratory evaluation of young febrile children, the evaluation of children at risk of diabetic ketoacidosis-related cerebral injury, and the laboratory and radiographic evaluation of the pediatric trauma patient.

    To view Dr. Nate Kuppermann's publications, visit PubMed

    About the Creator
    Dr. Michael J. Palchak
    Dr. Nate Kuppermann