Q.All true
regarding colon except
a.in supione
postion , transverse and sigmoid colon usually contain greatest amount of gas
b.calibre of
colon varies from 3 to 6 cm
c.caecum has
the greatest diameter in colon
d.rupture of
sigmoid colon diverticula usually results in free intraperitonal air
e.persistent
caecal diameter of 9 to 10 cm or more indicate of risk of impending perforation
ANS.d
Rupture of
sigmoid colon diverticula usually results in development of retroperitoneal
gas because sigmoid diverticula are
frequently oriented toward the sigmoid mesentry .
The sigmoid
colon and transverse colon are intraperitoneal structures suspended by the
sigmoid mesentry and transverse mesocolon respectively .Ascending colon and
descending colon and rectum are fixed retroperitoneal structures .
On upright
abdominal radiograph ,air-fluid levels in the bowel are often interpreted as
sign of obstruction
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