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CT ANGIOGRAPHY ABDOMEN

INDICATIONS

INDICATIONS (1-3)

From ACR Criteria:

  • AAA

    • asymptomatic, surveillance

    • follow up after repair, (open or endovascular)

    • pre-op planning (open or endovascular)

  • Breast reconstruction surgical planning, deep inferior Epigastric arteries evaluation, initial imaging

  • Mesenteric ischaemic

    • acute, suspected, initial exam 

    • chronic, suspected, initial exam

  • Transcatheter aortic valve replacement (TAVR), pre intervention planning, supravalvular aorta and iliofemoral 

  • Retroperitoneal bleed suspected, initial imaging

  • Upper GI bleed

    • nonvariceal, arterial source on endoscopy 

    • nonvariceal, endoscopy negative, or no clear source 

    • nonvariceal, postsurgical or traumatic, endoscopy contraindicated 

  • Abdominal mass, pulsatile, AAA suspected 

  • Hypertension, high suspicion renal vascular pathology, normal renal function (renal angiogram)

Pathology Demonstrated

PATHOLOGY DEMONSTRATED (1-3)

  • Abdominal aortic aneurysm

  • Aortic calcification

  • Haemorrhage

Patient Preparation

PATIENT PREPARATION

  • Patient able to lie still for ten minutes

  • Not claustrophobic (sedation may be given)

  • Cognitively capable of following basic instructions

  • Metal artefacts removed from the region of interest, including bras and necklaces

  • No respiratory distress when lying supine

  • Not allergic to Iodine based Contrast

  • No known kidney disease (eGFR below 30 as per RANZCR), however, acute setting consultant may sign to continue with poor renal function

  • No hyperthyroidism, may induce thyroid storm

  • Patient to have 18G cannula in anterior cubital fossa to enable a 7ml/s flow rate (20G cannula acceptable if flushing to 5ml/s).

  • Preferably patient fasted for 4 hours

ANATOMY INCLUDED

ANATOMY INCLUDED
 

Abdomen Angiogram (Axial)
Abdomen Angiogram (Coronal)
Abdomen Angiogram (Sagittal)

REFERENCES

1. American College of Radiology (ACR). Appropriateness Criteria. [Internet]. 2022 [Updated 2021, cited 10 Aug 2022]. Available from https://www.acr.org/Clinical-Resources/ACR-Appropriateness-Criteria​

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2. Radiopaedia. CT Abdomen-Pelvis (Protocol) [Internet]. 2008 [updated 7 April 2022, cited 23 Aug 2022]. Available from https://radiopaedia.org/articles/ct-abdomen-pelvis-protocol-1?lang=us

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3. Radiopaedia. Abdominal Aortic Aneurysm [Internet]. 2008 [updated 7 April 2022, cited 23 Aug 2022]. Available from https://radiopaedia.org/articles/abdominal-aortic-aneurysm?lang=gb

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