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Feb 13, 2023, 6 tweets

What is the rule here?

Here....

The 3-6-9 Rule

The 3-6-9 rule is a simple aide-memoire describing the normal bowel caliber:

small bowel: <3 cm

large bowel: <6 cm

appendix: <6 mm

cecum: <9 cm

Above these dimensions, the bowel is generally considered dilated, and obstruction or an adynamic/paralytic ileus should be considered.

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