GI Flashcards
How does metoclopramide work?
D2 receptor anatagonist
Side effects of metoclopramide
Extra pyramidal movements (e.g. tardive dyskinesia, oculogyral crisis)
Hyperprolactinaemia
Parkinonism
Management of variceal bleeding
Terlipressin and prophylactic antibiotics at presentation (i.e. before endoscopy)
Then do band ligation
Treatment of gastric varices
Injections of N-butyl-2-cyanoacrylate
If initial management of varices does not work, what should you do?
Transjugular intrahepatic shunt
Hereditary haemochromatosis inheritance pattern
Autosomal recessive
Liver failure triad
JEC
Jaundice
Encephalopathy
Coagulopathy
First line test for coeliac disease
Tissue transglutaminase antibodies
What is coeliac disease
A sensitivity to gluten
-repeated exposure leads to villous strophy, which in turn causes malabsorption
What are patients with primary sclerosing cholangitis at risk of?
Around 10% of patients with primary sclerosing cholangitis will develop cholangiocarcinoma
Also have an increased risk of colorectal cancer
What is primary sclerosing cholangitis?
Inflammation of the intra- and extra hepatic bile ducts
Which other conditions are associated with primary sclerosing cholangitis?
Ulcerative colitis
Crohn’s
HIV
(10% of patients with PSC will develop cholangiocarcinoma)
What might you see on liver biopsy in primary sclerosing cholangitis?
Would see onion skin fibrosis
First line investigation for primary sclerosing cholangitis, and what will investigation show?
ERCP - will show beaded appearance (from multiple biliary strictures)
A young man with RIF pain, what must you do?
MUST always examine the testicles
In young men with RIF pain, could be appendicitis or testicular problems (infection/torsion)
Which type of peptic ulcers are more common? and clinical feature?
Duodenal ulcers more common, epigastric pain relieved by eating
Colicky pain, typically in the LLQ
Diarrhoea, sometimes bloody
Fever, raised inflammatory cells and white cells
Acute diverticulitis
Tinkling bowel sounds
Intestinal obstruction
How does mesenteric ischaemia present?
Central abdominal pain - patients typically have a history of AF or other cardiovascular disease
-Diarrhoea, rectal bleeding may be seen
A METABOLIC ACIDOSIS IS OFTEN SEEN (due to tissue ‘dying’)
What type of ABG would you see in mesenteric ischamia
Often see a metabolic acidosis
When is mesenteric ischaemia worse?
Worse after eating - as gut is having to work and digest food
- Do MR angiogram
Investigation for mesenteric ischaemia
MR angiogram
Thumb printing
Ischaemic colitis
Risk factors for mesenteric ischaemia?
Atrial fibrillation
Other causes of emboli include endocarditis, malignancy
What drug might predispose to bowel ischaemia?
Cocaine - ischaemic colitis is sometimes seen in young patients following cocaine use
Management of ischaemic colitis
Usually supportive - surgery may be required in a minority of cases (e.g. if generalised peritonitis or perforation or on-going haemorrhage)
Treatment of overflow diarrhoea?
Treat with high dose osmotic laxatives
May cause confusion in old people
Constipation
Characteristic presentation of feacal impaction?
Loose stools intermixed with solid or hard stools and abdominal pains
Treatment for clostridium difficile infection?
Metronidazole
Budd-chiari triad?
Ascites
Abdominal pain
Enlarged liver
Who is Budd Chiari most likely to occur in?
More likely to occur in a patient with hypercoagulative state e.g. anti-phospholipid syndrome
(can also occur as a result of physical obstruction e.g. tumour)
What is Barrett’s osesophagus?
When squamous epithelium is replaced by columnar epithelium
Risk factors for Barrett’s
GORD (biggest risk factor)
Male (7:1)
Smoking
Central obesity
Management of Barrett’s
endoscopic surveillance with biopsies
high-dose proton pump inhibitor
How often should you scope someone with Barrett’s?
Scope every 3-5 years
-if they develop dysplasia then will need endoscopic mucosal resection or radiofrequency ablation
Features of achalasia
Dysphagia of both solids and liquids
Regurgitation of food - may lead to cough, aspiration pneumonia etc
CREST
Calcinosis Raynauds Esophageal dysmotility Sclerodactyly Telangiectasia
Lower oesophageal sphincter pressure in achalasia/systemic sclerosis
Increased pressure in achalasia
Decreased pressure in systemic sclerosis
When is myasthenia gravis better?
Better in the morning
Villous atrophy
Raised intraepithelial lymphocytes
Crypt hyperplasia
Coeliac disease
Treatment for giardia lamblia
Metronidazole
Biopsy findings of a gastric adenocarcinoma
Signet ring cells
Signet ring cells
Gastric adenocarcinoma
Side effects of 5-ASAs e.g. mesalazine
Diarrhoea, nausea, vomiting, exacerbation of colitis ACUTE PANCREATITIS (7 times more common inpatients taking mesalazine rather than sulfasalazine)
“severe epigastric pain which radiates through to the back”
Acute pancreatitis
Side effects of sulphasalazine
Rashes Oligospermia Headache Heinz body anaemia Megaloblastic anaemia Lung fibrosis
What should you give patients with ascites and protein <15g/dl
Give them oral ciprofloxacin or nofloxacin as prophylaxis against spontaneous bacterial peritonitis
Management of spontaneous bacterial peritonitis
IV cefotaxime
Antibiotics for pyogenic liver abscess
MAC
Metronidazole
Amoxicillin
Ciprofloxacin
What is Peutz Jeghers syndrome
Autosomal dominant
Polyps in the GI tract (may lead to intussusception)
Pigmented lesions on lips, oral mucosa, face, palms and soles
GI bleeding
You want to screen someone for hep B infection what should you look for?
HBsAg
What is Mirizzi syndrome?
When the common hepatic ducts become obstructed because of extrinsic compression e.g. impacted stone in cystic duct/hartmann’s pouch of gallbladder
What is gallstone ileus?
Obstruction of the bowel due to impaction of gallstones
Treatment with clindamycin is associated with high risk of what
C. diff
diarrhoea
abdominal pain
a raised white blood cell count is characteristic
if severe toxic megacolon may develop
C diff.
Diagnosis of C diff.
C. diff toxin in stool
Endoscopy when someone has a pharyngeal pouch
Will probably be poorly tolerate - also quite hazardous and may result in iatrogenic perforation
Increased goblet cells
Crohn’s
How long should you reintroduce gluten for, before testing for coeliac?
Reintroduce for 6 weeks
Test for H. pylori
Carbon-13 urea breath test or stool antigen
Test of h. pylori cure
Carbon-13 urea breath test