AttendMe Owl Logo
AttendMe
Sign In
All Pathways
RadiologyManagement

Contrast Allergy Management (ACR 2021)

Contrast Allergy Management (ACR 2021): Prior Contrast Reaction History → Prior Reaction Severity → Mild Prior Reaction → Consider Premedication.

Interactive Decision Tree

Mini Map

Algorithm Steps

  1. ▶
    Start

    Prior Contrast Reaction History

    1. ◆
      Decision

      Prior Reaction Severity

      • Mild
      • Moderate
      • Severe
      1. ●
        Action

        Mild Prior Reaction

        Urticaria, itching, nausea

        1. ■
          End

          Consider Premedication

          Different contrast class if possible

      2. ●
        Action

        Moderate Reaction

        Bronchospasm, facial edema

        1. ●
          Action

          Premedication Protocol

          Prednisone 50mg at 13h, 7h, 1h + DPH

          1. ■
            End

            Use Different Contrast Agent

      3. ●
        Action

        Severe Prior Reaction

        Anaphylaxis, cardiovascular collapse

        1. ◆
          Decision

          Alternative Imaging?

          1. ■
            End

            Non-Contrast Study

          2. ■
            End

            Full Precautions

            Premed + different agent + monitoring

Guideline Source

ACR Manual on Contrast Media 2021

DOI: 10.1016/j.jacr.2020.01.030View Guideline

Clinical Safety Information

Clinical Decision Support — Not a Substitute for Clinical Judgment

Individual patient factors may require deviation from these recommendations.

Known Limitations

  • Premedication does not guarantee prevention
  • Breakthrough reactions still occur
  • Skin testing not widely validated

Applicable Regions

USAUUKEU

EU: ESUR guidelines; allergist consultation

US: ACR Manual standard

Version 1Next review: 2028-01-01

Related Radiology Pathways

Acute Abdomen Imaging Selection (ACR)

Diagnostic

Acute Stroke Imaging Protocol (AHA/ASA)

Diagnostic

Contrast Extravasation Management (ACR 2024)

Emergency

Contrast-Induced AKI Prevention (ACR/KDIGO)

Management

Next steps

Finish the workflow by opening the most relevant calculator, then convert the session into a live account when you are ready.

Calculator

Body Mass Index

Weight classification based on height and weight

Open page

Compare

AttendMe.ai vs UpToDate

See how this pathway workflow compares against UpToDate.

Open page

Commercial

Start free

Run the pathway in a live AttendMe account with citations and tracked usage.

Start free

Related Resources

All Clinical PathwaysClinical CalculatorsAI Chat with Auto-Detection

Frequently Asked Questions

What is the Contrast Allergy Management (ACR 2021)?

The Contrast Allergy Management (ACR 2021) is a management clinical algorithm for Radiology. It provides a structured decision tree to guide clinical decision-making, based on ACR Manual on Contrast Media 2021.

What guideline is the Contrast Allergy Management (ACR 2021) based on?

This algorithm is based on ACR Manual on Contrast Media 2021 (DOI: 10.1016/j.jacr.2020.01.030).

What are the limitations of the Contrast Allergy Management (ACR 2021)?

Known limitations include: Premedication does not guarantee prevention; Breakthrough reactions still occur; Skin testing not widely validated. Individual patient factors may require deviation from these recommendations.

Get AI-Powered Analysis Alongside This Algorithm

In AttendMe.ai, the Contrast Allergy Management (ACR 2021) appears automatically when your clinical question matches — alongside evidence from 3M+ peer-reviewed articles.

Try AttendMe Free