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.
epos.myesr.org/posterimage/es…
Radiopedia
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