Duodenal obstruction may be classified by location, extent or other factors.
Location of Obstruction
Type of Obstruction
proximal to the ampulla
Type I
at the ampulla
Type II
distal to the ampulla
Type III
Classification by cause of obstruction:
(1) stricture
(2) intra-luminal mass
(3) external compression
Degree of obstruction:
(1) minimal
(2) partial
(3) complete
Classification by length of obstruction:
(1) narrow
(2) long
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Specialty: Gastroenterology
