Definitions:
•Ileus : Mechanical or functional intes.
Obstruction (Adynamic or paralytic).
•Mechanical obstruction :complete or partial
blockage of the intes. Lumen.
•Simple obstruction: one obstructing point.
•Closed loop obstruction :both the afferent and
the efferent loops are obstructed.
•Strangulation : where the blood supply to the
affected part of the intestine is impaired more
likely to sustained increased intraluminal
pressur.
Medical causes of small & Large
bowel obstruction
Medications
Response to
localized
Inflammatory
process
Diffuse
peritonitis
Retroperitoneal
process
Neuropathic
disorders
Post. Operative
ileus
Metabolic
cases
Medical causes of small & Large
bowel obstruction
Metabolic:
1.Hypokalemia.
2.Hypomagnesemia.
3.Hyponatremia.
4.Ketoacidosis.
5.Uremia.
6.Porphyria.
7.Heavy metal poisoning.
Medications:
1.Narcotics.
2.Antipsychotics.
3.Anticholinergics.
4.Ganglionic blockers.
5.Agents used to treat Parkinson’s
disease.
For optimal treatment to be instituted,
five questions must be answered:
•Is the diagnosis intestinal obstruction?. Is
the obstruction is mechanical? .
•What is the level of obstruction?.
•Is there evidence of bowel wall ischemia or
perforation?.
•How sever is the associated systemic
disorders?.
Retroperitoneal process:
1.Retroperitoneal hematoma.
2.Pancreatitis.
3.Spinal or pelvic fracture.
Post. Operative ileus following
intra-abdominal surgery:
AS the motility usually returns for
the:
small bowel within 24 –48 hrs.
gastric within 48 hrs.
colonic within 3-5 days.