ABDOMINAL X-RAY (AXR)

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Topics

  • Ryles Tube – indications, tests
  • NJ Tube
  • AOD – Commonest 2 causes
  • AXR: BowelBonesCalcification(Stones)
  • The upper limits for the normal diameter 3,6,9 rule (SBO >3cm LBO >6cm Caecum >9cm)
  • LBO & Ileo-Caecal Valve Significance

Notes

Projection of the abdominal X-ray.

Typical projections of an abdominal X-ray include:

  • Anterior-posterior (AP) supine
  • Anterior-posterior (AP) erect

BBC approach:

  • Bowel and other organs: small bowel, large bowel, lungs, liver, gallbladder, stomach, psoas muscles, kidneys, spleen and bladder.
  • Bones: ribs, lumbar vertebrae, sacrum, coccyx, pelvis and proximal femurs.
  • Calcification and artefact (e.g. renal stones)

Bowel Diameter:

The upper limits for the normal diameter of different bowel segments are as follows:

  • Small bowel: 3cm
  • Colon: 6 cm
  • Caecum: 9 cm

This is often referred to as the ‘3/6/9 rule’.

Media

References

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