ABDOMINAL DISTENSION

nonmechanical obstruction:

vascular insufficiency:

thrombosis

embolism

retroperitoneal irritation:

renal colic

neoplasm

infection

extra-abdominal infection:

sepsis

pneumonia

empyema

spinal osteomyelitis

metabolic / toxic:

hypokalaemia

uraemia

lead poisoning

chemical irritation:

perforated peptic ulcer

pancreatitis

biliary peritonitis

other / miscellaneous:

excessive intraluminal gas

intra-abdominal infection

trauma

mechanical ventilation

other causes of peritoneal inflammation

severe pain and NSAIDs

mechanical obstruction:

neoplasms:

intraluminal

extraluminal

infections:

diverticulitis

intra-abdominal abscess

parasitic infections

foreign bodies:

bezoar

ingested foreign body

other / miscellaneous:

adhesions

endometriosis

pregnancy

strangulated hernia

volvulus

intussusception

gallstones

faecalith / meconium ileus

haematoma

pneumatosis intestinalis (pneumatosis coli)

superior mesenteric artery syndrome

annular pancreas

Hirschsprung's disease

stenosis:

radiation

surgical anastamosis site

Crohn's disease

tuberculous

non-obstructive causes (of abdominal distension):

ascites

abdominal or pelvis masses, eg.  hepatoma, ovarian tumour

intra-abdominal bleeding, eg. ruptured aortic aneurysm

obesity

pregnancy

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