Diseases of the small bowel and appendix Flashcards

1
Q

What can cause small bowel obstruction?

A

Fluid, gas ischaemia, perforation

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2
Q

What will obstruction present with?

A
Absolute constipation 
Vomiting
Colicky, central pain
Burping
Abdominal distension
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3
Q

What are the 3 types of obstruction?

A

Within the lumen (gallstone, food, bezoar)
Within the wall (tumour, crohn’s, radiation)
Outisde the wall (adhesions, herniation)

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4
Q

What is borborygmi?

A

A rumbing or gurgling noise made by the movement of fluid and gas in the intestines

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5
Q

What investigations should be carried out for a suspected small bowel obstruction?

A
Urinalysis
Bloods
Gases
AXR
Contrast CT
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6
Q

What is drip and suck?

A

ABC
Analgeisa
Fluids with potassium - patients usually hypokalaemia and alkalotic
Catheterise
NG tube
Antithromboembolism measures - ted stockings

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7
Q

When should surgical intervention be used for obstruction?

A

Hernias
Strangulation
Perforation
Ischaemia

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8
Q

What can cause mesenteric ischaemia?

A

Embolus, thrombosis

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9
Q

What can cause chornic mesenteric ischaemia?

A

SMA
Cramps like angina of the guts
Atherosclerosis

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10
Q

Why will the colon live when there is mesenteric ischaemia?

A

Due to the marginal artery of drummond

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11
Q

What can cause an embolus?

A

AF, formed in left atrium and will stick in narrow SMA

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12
Q

Why will thrombosis occur in accordance with virchows triad?

A

Dehydration
Hypercoguable due to unwell state
Compression
Vasoconstricting drugs

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13
Q

How is mesenteric ischaemia diagnosed?

A
Pain out of proporiton to clinical findings
Metabolic acidosis
Elevated lactate
Normal CRP 
WCC raised slightl
CT angiogram
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14
Q

How is mesenteric ischaemia treated?

A

Quickly
Resect if non-viable
Re-anastomose or staple and planned return
SMA embolectomy

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15
Q

What can cause haemorrhage in the small bowel?

A

Vascular malformations

Ulcerations

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16
Q

What is meckel’s diverticulum?

A

Remnant of the omphalomesenteric duct - gut separates in embryo but the bud can sometimes stay
Cells at tip of meckel’s diverticulum are gastric in origin so can produce acid

17
Q

What are some common complications of meckel’s diverticulum?

A

Bleed
Ulcerate
Obstruction
Malignant change

18
Q

Where can meckel’s diverticulum be found?

A

2 feet from IC valve
2% of population
Presents before 2 years of age

19
Q

What is the aetiology of appendicitis?

A
No unfiying hypothesis
Obstruction of the lumen with faecolith 
Bacterial 
Viral 
Parasites
20
Q

What is the pathology of appendicitis?

A
Hugh variation in macroscopic disease 
Lumen may or more not be occluded
Mucosal inflammation 
Lymphoid hyperplasia
Obstruction 
Build up of mucus and exudate
Venous obstruction 
Ischaemia.. bacterial invasion through wall
Perforation 
Phelgmonous mass
21
Q

What are the classical symptoms of appendicitis?

A
Central pain that migrates to  RIF
Anorexia 
Nausea
One or two vomits
Ileus
Pelvic pain 
Mild pyrexia
Mild tachycardia
Involulntary guarding
22
Q

What are the differential diagnoses for appendicitis?

A
Gastroentertisi
Mesenteric adenitis
Mecjel's diverticulum
Intusseption 
Henoch-schonlein purpura
Lobar pneumonia
23
Q

How is appendicitis investigated?

A
Clinical diganosis
USS useful in women and kids
AXR to exclud other causes
Bloods (CRP, WCC) 
Urinalysis to ensure not UTI or ectopic pregnancy
24
Q

How is appendicitis managed?

A
Analgesia
Antipyretics
Theatre
Antibiotics
Appendicectomy
25
Q

What are complications of an appendectomy?

A
Pelvic abscess
Wound infection 
Intra-abdominal abscess
Ileus 
Respiratory 
DVT/PE
Portal pyaemia
Faecal fistula
Adhesions 
Right sided inguinal hernia