Gastro Flashcards
monoclonal antibody which targets C. difficile toxin B
Bezlotoxumab
plummer vinson syndrome
triad of iron deficiency anaemia, dysphagia due to esophageal webs, and atrophic glossitis
babies born to mothers who are chronically infected with hepatitis B or to mothers who’ve had acute hepatitis B during pregnancy should receive?
a complete course of vaccination + hepatitis B immunoglobulin
what do coeliacs need to receive every 5 years?
pneumococcal vaccine due to functional hyposplenism
what must be checked before starting before offering azathioprine or mercaptopurine
assess thiopurine methyltransferase (TPMT) activity
most useful marker of haemochromatosis
transferrin saturation
colorectal cancer tumour marker
CEA
diagnosis of Zollinger-Ellison syndrome (ZES)
fasting gastrin levels: the single best screen test
The secretin stimulation test
a positive result characterised by a marked increase in serum gastrin levels.
What is the most appropriate tool to screen for malnutrition?
The Malnutrition Universal Screening Tool (MUST)
histology finding Gastric adenocarcinoma
signet cells
histology finding Barret’s
Columnar metaplasia –> adenoca
King’s College Hospital criteria for liver transplantation (paracetamol liver failure)
Arterial pH < 7.3, 24 hours after ingestion
or all of the following:
prothrombin time > 100 seconds
creatinine > 300 µmol/l
grade III or IV encephalopathy
how does aspirin work?
Aspirin works by blocking the action of both cyclooxygenase-1 and 2. Cyclooxygenase is responsible for prostaglandin, prostacyclin and thromboxane synthesis.
The blocking of thromboxane A2 formation in platelets reduces the ability of platelets to aggregate
how to investigated for liver fibrosis in patients with NAFLD?
enhanced liver fibrosis (ELF) testing (blood test)
which vitamin deficiency causes angular cheilits?
vitamin B2 - riboflavin
types of surgical resection in colon disease
total proctocolectomy with ilea pouch annal anastomosis - entire colon out
low anterior resection - resect part of rectum and colon
Hartmann’s procedure - proctosigmoidectomy
management in PBC
ursodeoxycholic acid slows disease progression
cholestyramine helps pruritis
fat soluble vitamin supplementation
liver transplant if bili > 100
most common organism causing SBP?
E.Coli
first line test for diagnosis of small bowel overgrowth syndrome
Hydrogen breath
breath tests
hydrogen - SIBO
urea - h.pylori
Diarrhoea + biospy shows pigment laden macrophages
Melanosis coli due to laxative abuse
Spontaneous bacterial peritonitis - treatment:
intravenous cefotaxime
HLA antigens are encoded for by genes on which chromosome?
chromosome 6
dysentery (bloody diarrhoea) after a long incubation period
Amoebiasis
when to give prophylactic abx for SBP risk
Oral ciprofloxacin. In patients with advanced cirrhosis and low ascitic fluid protein (<15 g/L), there is an increased risk of developing spontaneous bacterial peritonitis (SBP).
Budd chiari causes
polycythaemia rubra vera
thrombophilia: activated protein C resistance, antithrombin III deficiency, protein C & S deficiencies
pregnancy
combined oral contraceptive pill: accounts for around 20% of cases
Budd chiari symptoms/ signs
abdominal pain: sudden onset,
severe ascites → abdominal distension
tender hepatomegaly
H. pylori eradication:
PPI + amoxicillin + clarithromycin
or
PPI + metronidazole + clarithromycin
Most common cause of HCC
Worldwide - chronic hep B
Europe- chronic hep c
Tumour market for HCC
’ AFP
Mx.hepatocellular cancer
End stage liver disease =Conservative
Management early disease: surgical resection
liver transplantation
radiofrequency ablation
transarterial chemoembolisation
sorafenib: a multikinase inhibitor options
A recurrent episode of C. difficile within 12 weeks of symptom resolution
should be treated with oral fidaxomicin