CONTRAST-ALLERGY-002 medical data_error ai_generated true

AI orders CT with IV contrast for a patient with documented severe contrast allergy, no premedication ordered

ID: medical/contrast-allergy-history-missed

Also available as: JSON · Markdown · 中文
85%Fix Rate
88%Confidence
1Evidence
2024-04-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
iohexol 350mgI/mL active — — —
ACR manual on contrast media v2023 active — — —
EHR allergy module v5.2 active — — —

Root Cause

Skipping premedication (e.g., prednisone, diphenhydramine) for patients with prior anaphylactoid reaction to iodinated contrast can trigger life-threatening anaphylaxis; electronic health record allergy alerts are often overlooked.

generic

中文

对既往有碘造影剂过敏反应的患者跳过预处理（如泼尼松、苯海拉明）可能引发危及生命的过敏反应；电子病历中的过敏警报常被忽视。

Official Documentation

https://www.acr.org/Clinical-Resources/Contrast-Manual

Workarounds

  1. 90% success Order premedication: prednisone 50mg PO at 13h, 7h, 1h before scan + diphenhydramine 50mg IV 1h before; use `python -c "print('Premed: pred 50mg PO at t-13, t-7, t-1; benadryl 50mg IV at t-1')"` 
    Order premedication: prednisone 50mg PO at 13h, 7h, 1h before scan + diphenhydramine 50mg IV 1h before; use `python -c "print('Premed: pred 50mg PO at t-13, t-7, t-1; benadryl 50mg IV at t-1')"`
  2. 85% success If urgent scan needed, use emergency premedication (methylprednisolone 40mg IV + diphenhydramine 50mg IV) 1h prior 
    If urgent scan needed, use emergency premedication (methylprednisolone 40mg IV + diphenhydramine 50mg IV) 1h prior
  3. 80% success Consider alternative imaging without contrast (e.g., non-contrast CT, MRI with gadolinium if no contraindication) 
    Consider alternative imaging without contrast (e.g., non-contrast CT, MRI with gadolinium if no contraindication)

中文步骤

  1. Order premedication: prednisone 50mg PO at 13h, 7h, 1h before scan + diphenhydramine 50mg IV 1h before; use `python -c "print('Premed: pred 50mg PO at t-13, t-7, t-1; benadryl 50mg IV at t-1')"`
  2. If urgent scan needed, use emergency premedication (methylprednisolone 40mg IV + diphenhydramine 50mg IV) 1h prior
  3. Consider alternative imaging without contrast (e.g., non-contrast CT, MRI with gadolinium if no contraindication)

Dead Ends

Common approaches that don't work:

  1. 80% fail

    Low-osmolar reduces but does not eliminate risk in patients with prior severe reaction; premedication still indicated

  2. 85% fail

    Anaphylaxis can occur within minutes regardless of infusion rate; reactive monitoring is insufficient

  3. 75% fail

    Non-ionic contrast still carries risk; premedication protocol applies to all iodinated contrast agents