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Flashcards in Bowel Obstruction Deck (11)
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1

Extrinsic mechanical causes
Mech means nat cause physical obstruc

Adhesions
Hernia
Intra or extra int cancer
Intra abdo abcess

2

Intrinsic mech causes

Malrotation
Duplications, cysts
Crohns
Infec- TB, actinomycosis, diverticulitis
Prim or met neoplasm- carcinoma, lymphome, carcinoid
Haematoma from trauma
Ischaemic stricture
Intussusception
Endometriosis
Radiation enteropathy or stricture

3

Intraluminal mech cause

Gallstone
Enterolith, fecal impaction
Bezoar
FB

4

Functional (ileus) causes
No mech blockage, inadeq peristalsis

Post laparotomy
Metabolic and electrolyte imbal eg hypoK,Mg,Na, uraemia, DM koma.
Drugs eg opiate, anticholinergics, psychotropic
Intra abdo inflamm
Retroperit inflamm or haemorrhage
Systemic sepsis

5

SI most common causes

Adhesions- surg, trauma, infec
Hernias
Tumours- GIST, carcinoid, lymphoma. Mets eg ovary, colorectal, stom
Crohns

6

SI px

Abdo pain, paroxysms ev 4-5 min
Vom, faeculent
Obstipation
Distension
Fail flatus
Visible peristalsis
Hernia/scar
High tinkling bowel sounds
Dehyd
Tachy
Hypot
Fever
Tenderness

7

SI and LI ix are the same

FBC, clotting, GS, UE, LFT, ABG
Plain AXR, CXR
Barium meal and follow through
MRI

8

SI mx

Fluids
NG tube
Catheter
Adhesions us self resolve. Surg if fever, peritonitis, perforat, refractory
Surg for non adhesional

9

LI most comm causes

Colorectal carcinoma
Diverticular dis
Vovlulus

10

LI px

Like SI but
Vom inconcspicuous
Longer btw pain paroxysms
May be rectal mass

11

LI mx

Fluid
Catheter
Sigmoid volvulus norm fixed by colonoscopy
Surg or stent for all other causes