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Quick Reference

MSK

• Femoroacetabular impingement (FAI)

  • Center Edge angle (Use caution, some only report this only when queried.)

    • <20 degrees: acetabular dysplasia

    • 20-25 degrees: borderline acetabular dysplasia

    • 25-40 degrees: normal 

    • >40 degrees: pincer type morphology 

Vascular 

• Aorta

  • Ascending: 4.0-4.4 cm = Ectasia, >4.5 cm = Aneurysm

  • Infrarenal: > 3 cm outer wall to outer wall = Aneurysm

• Main pulmonary artery

  • Normal < 2.9 cm

Gastrointestinal

• Hepatomegaly:  18 cm craniocaudal (debatable)

• Splenomegaly: 13 cm craniocaudal (debatable)

Genitourinary

• Thickened junctional zone: >12 mm

Head

• Large vestibular aqueduct: >=1mm at midpoint or >= 2mm at the distal opening (Operculum)

Cardiac

• Aortic Stenosis: Measurement of opening area 

• Mild < 2 cm2

• Severe < 1 cm2

• Critical stenosis < 0.8 cm2

Ultrasound

• Slow flow portal vein <15cm/s

• Postmenopausal bleeding

• Endometrium: 

• <5mm = likely atrophy

• >4-5mm = hypertrophy vs cancer, gets a biopsy

• Normal Postvoid Volume: <100mL

• Fetal anatomy scan

  • Amniotic Fluid index

    • < 5 cm oligohydramnios

    • > 25 cm polyhydramnios

  • Deepest vertical pocket

    • < 2 cm oligohydramnios

    • > 8 cm polyhydramnios

Peds

• Umbilical Artery Catheter Positioning: High position: T5-T9, low position: L3-L5

• Pyloric Stenosis: 3 mm width, 14mm length (Think Pi, 3.14)

• Diastratic Fracture:  >1 mm of asymmetric widening of a suture after trauma when compared to the contralateral suture

• Umbilical Artery Catheter: T5-T9 (is fine, rhymes)

• Intussusception 

  • (Not Definite) < 2.0 cm diameter likely small bowel - small bowel intussusception and likely transient

  • (Not Definite) > 2.5 cm diameter more likely ileocolic intussusception and likely needs treatment

• ECMO

  • Venoarterial: venous cath in right atrium (sometimes the tip looks like a dot) and the arterial cath in the aorta near the innominate artery

    • Dictation "Arterial catheter overlines the region of the aortic arch"

  • Venovenous: both venous caths are in the right atrium

Chest