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      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
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    Patent Pending

    RIPASA Score for Acute Appendicitis

    Diagnoses appendicitis with lab values and clinical findings, especially for Asian populations.
    When to Use
    Pearls/Pitfalls
    Why Use

    Patients being evaluated for acute appendicitis.

    • RIPASA is a scoring system for diagnosing appendicitis.
      • Similar to the Alvarado Score, it typically provides a quantitive value for a clinician's clinical gestalt of appendicitis.
    • It is very accurate for the diagnosis of appendicitis when above a point threshold - typically above 7.5 points.

    Points to keep in mind:

    • It has been most widely studied in Asian populations (Singapore, India) and less so in Western populations.
    • Because it was developed in Singapore which has a large number of foreign nationals, the “Foreign national registration identity card” was included in the score as it was found to have some predictive capacity. This is harder to apply to other populations.

    Negative appendectomies were relatively common in the RIPASA study cohorts, suggesting that use of the score might have reduced unnecessary surgeries while missing few with appendicitis.

    Demographic Information
    Female
    +0.5
    Male
    +1
    ≤40
    +1
    >40
    +0.5
    No
    0
    Yes
    +1
    Symtoms
    No
    0
    Yes
    +0.5
    No
    0
    Yes
    +0.5
    No
    0
    Yes
    +1
    No
    0
    Yes
    +1
    ≤48 hrs
    +1
    >48 hrs
    +0.5
    Signs
    No
    0
    Yes
    +1
    No
    0
    Yes
    +2
    No
    0
    Yes
    +1
    No
    0
    Yes
    +2
    No
    0
    Yes
    +2
    Labs
    No
    0
    Yes
    +1
    No
    0
    Yes
    +1

    Result:

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    Next Steps
    Evidence
    Creator Insights
    Dr. William Chong

    About the Creator

    William Chong, MD, MBBS, BSc, is a cardiothoracic surgeon at RIPAS Hospital in Bandar Seri Begawan in Brunei. He is an active researcher in his field as well as in general surgery.

    To view Dr. William Chong's publications, visit PubMed

    Are you Dr. William Chong? Send us a message to review your photo and bio, and find out how to submit Creator Insights!
    MDCalc loves calculator creators – researchers who, through intelligent and often complex methods, discover tools that describe scientific facts that can then be applied in practice. These are real scientific discoveries about the nature of the human body, which can be invaluable to physicians taking care of patients.
    About the Creator
    Dr. William Chong
    Are you Dr. William Chong?