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Trauma Code AAA

Last Updated: 2026-01-01 Author:

  • 1. Clinical Summary

    Series Phase Coverage
    Non-Contrast CAP Non-contrast Diaphragm to Pubic symphysis
    Arterial CAP Contrast (25-30 sec delay) Diaphragm to Pubic symphysis
    Portal Venous CAP Contrast (70 sec delay) Diaphragm to Pubic symphysis
    • Ruptured AAA
    • Aortic emergency
    • Hemodynamic instability with abdominal pain

  • 2. Patient Prep

    • Position: Supine with arms raised
    • NPO Status: None - emergency

  • 3. IV Contrast & Injection

    Parameter Value
    Agent Omnipaque 350
    Volume 125 mL
    Flow Rate 4-5 mL/s
    Timing Method Triple phase: NC + Arterial + Portal venous
    ROI Placement Abdominal aorta
    Trigger (HU) 150 HU

    Use full dose if GFR > 30

    If GFR < 30

    Max Contrast = \(2*\left[\frac{\text{Patient Weight}}{75 \text{ kg}} * \text{eGFR}\right]\)

  • 4. Special Notes

    • RAPID triple phase: 1) NC CAP (hematoma) 2) Arterial CAP (active bleed bolus track 25-30s) 3) Portal venous CAP (70s). STAT protocol
    • Additional Recons: Measure aneurysm. Identify bleeding site. EVAR measurements if stable
    • Large bore IV 18G minimum. Blood products ready

    Safety First

    • Renal Function: Emergent - proceed
    • Allergy: Document emergency
    • NC: retroperitoneal hematoma. Arterial: active extravasation aneurysm morphology. Portal: solid organs
    • STAT protocol. Minimize delays. Notify vascular surgery
Series Name Start Location End Location Delay Slice Thickness Notes
Scout Diaphragm Pubic symphysis N/A N/A STAT
Non-Contrast CAP Diaphragm Pubic symphysis N/A 2.5 mm RAPID - hematoma
Arterial CAP Diaphragm Pubic symphysis 25-30 sec 0.625 mm Active bleeding + aneurysm
Portal Venous CAP Diaphragm Pubic symphysis 70 sec 2.5 mm Organs and venous
Plane Acquisition FOV Thickness/Increment Kernel IR Strength Notes
Axial All phases CAP 2.5 mm/2.5 mm Vascular/Standard 3 Compare phases
Coronal Arterial CAP 2.5 mm/2.5 mm Vascular 3 Aorta and bleeding
Sagittal Arterial Aorta 2 mm/2 mm Vascular 3 Aorta extent
3D VR Arterial Aorta 1.5 mm Vascular 3 STAT 3D for EVAR planning