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

    Disease

    Select...

    Specialty

    Select...

    Chief Complaint

    Select...

    Organ System

    Select...

    Patent Pending

    Save your unit preferences in settings!

    CHIP (CT in Head Injury Patients) Prediction Rule

    Predicts intracranial traumatic CT findings in patients with minor head trauma.
    Favorite

    INSTRUCTIONS

    Use in patients at least 16 years old presenting within 24 hours of blunt head trauma and GCS 13–14 (or GCS 15 with at least one of the following: LOC, short-term memory deficit, amnesia, seizure, vomiting, severe headache, intoxication, anticoagulant use or history of coagulopathy, external evidence of injury above the clavicles, neurologic deficit). Note: We recommend using the Canadian CT Head Rule over other adult head trauma decision rules, as it is the most widely validated.

    When to Use

    Do you use the CHIP Rule and want to contribute your expertise? Join our contributor team!

    <40 years
    40-60 years
    ≥60 years
    No
    Yes
    None
    1 point
    ≥2 points
    None
    Skull contusion
    Any injury suggesting skull fracture, e.g. palpable discontinuity of skull, CSF leakage, raccoon eyes, bleeding from ear
    None
    2 to <4 hr
    ≥4 hr
    No
    Yes
    No
    Yes
    No
    Yes
    No
    Yes
    No
    Yes
    No
    Yes
    No
    Yes
    No
    Yes
    No
    Yes

    Result:

    Please fill out required fields.

    Next Steps
    Evidence
    Creator Insights

    Advice

    Do you use the CHIP Rule and want to contribute your expertise? Join our contributor team!

    About the Creator
    Dr. Marion Smits
    Are you Dr. Marion Smits?