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

    Harmless Acute Pancreatitis Score (HAPS)

    Identifies patients who do not require intensive care for their first episode of acute pancreatitis.
    When to Use
    Why Use

    Patients with pancreatitis, particularly early in course.

    • The Harmless Acute Pancreatitis Score (HAPS) was developed primarily by chart review (retrospective) studies.
    • The HAPS may have high predictive value for low risk patients and may be sufficient to suggest that a patient does not require immediate ICU admission.
    • It uses just three variables, one subject to clinician judgment.
    • A score of 0 suggests the absence of pancreatic necrosis, need for dialysis, artificial ventilation, or fatal outcome with 97% specificity and 98% positive predictive value in the original study.

    Identifying low risk patients with pancreatitis is notoriously difficult; a scoring system may help.


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    Next Steps
    Creator Insights


    The HAPS should not be used in isolation to suggest that a patient will have a “harmless” course of pancreatitis, but may be an additional useful piece of data in otherwise low-risk patients.


    We are not aware of algorithms incorporating the HAPS.

    Critical Actions

    The HAPS is not designed to identify patients with high risk of pancreatitis, only those with low risk.


    Selection of appropriate criteria.

    Facts & Figures

    The Harmless Acute Pancreatitis Score (HAPS) rules out “severe” pancreatitis and need for admission for acute pancreatitis based on three clinical values:

    • Peritonitis
    • Creatinine
    • Hematocrit

    If the above criteria are normal (score of 0), the patient likely does not need ICU admission.

    Dr. Paul Georg Lankisch

    About the Creator

    Paul Georg Lankisch, MD, is a professor of medicine in the Peter A. Banks Department of General Internal Medicine and Gastroenterology at the Clinical Centre of Lüneburg, Germany. He is an active researcher on treatment, outcomes and pathways of acute pancreatitis.

    To view Dr. Paul Georg Lankisch's publications, visit PubMed