Vascular

PA

• MPA diameter > 29 mm
• RPA > 21 mm
• LPA > 19 mm

RDPA

• Male < 16
• Female < 15

Aorta

Aneurysm: 5-4-3

Normal

• < 2.5 cm (Upper)
• < 2 cm (Lower)

Abnormal

• Ectasia: 2.5 - 3 cm
• Aneurysm: > 3 cm

Aortic Aneurism

Dilate

• Thoracic
  • Ascending > 4 cm
  • Descending > 3.5 cm
• Abdominal
  • > 3 cm (Aneurism)
  • 2.5 - 3 cm (Ectasia)

Surgery Candidate

• AAA: > 5.5 cm (need Sx); > 5 cm (consider Sx)
• TAA:
  • Ascending > 5.5 cm
  • Descending > 6 cm

Artery

SMA Syndrome

• Aorto-mesenteric angle < 22 degree (sagital)
• Aorto-mesenteric distance < 8 mm (axial)

Vein

IVC

• Slit-like IVC: AP diameter < 9 mm, TV:AP diameter > 3:1

Abdomen

• Splenic v. < 11 mm
• SMV < 12 mm
• Portal v. < 13 mm