Gastro-Intestinal Flashcards
What test do you use to investigate H.pylori ?
- Helicobacter pylori urea breath test
- H pylori faecal antigen test
- FBC - Show Leukocytosis and reduced haemoglobin and haematocrit.
When would you refer a patient with dyspepsia and acute gastrointestinal bleeding? and What is the gold standard diagnostic test for peptic ulcer disease?
Immediately and Endoscopy
what is the first line diagnostic test for Peptic ulcer disease with h.pylori
Histology and/or urease testing (rapid urease test) or Stool antigen test.
What test is used to confirm successful eradication of H.pylori
Carbon-13 urea breath test 6 to 8 weeks after starting treatment
Is there an investigation available for diagnosing iBS?
NO
What is a) the first line investigation and b) the diagnostic of coeliac disease?
Serology - IGA tissue transglutaminase antibody and total IgA - THIS IS NOT DIAGNOSTIC.
Endoscopic intestinal biopsy - Diagnostic.
Diverticular disease is confirmed by:
Endoscopy, colonoscopy, or CT Colonography.
When do you use a stool culture and sensitivity test for Infectious diarrhoea
Diarrhoea has not resolved by day 7
travelled abroad - 3 specimiens for ova/cysts and parasites (2-3 days apart)
All children under age 5 years - who are at risk of shiga toxin-producing e.coli)
contact with an affected person.
What condition causes: Sudden-onset, constant, severe pain in the upper right quadrant, lasting several hours. It can radiate to the back, referred pain in the shoulder or interscapular region.
Acute Pancreatitis
Confirmatory test for acute Cholecystitis?
Abdominal ultrasound
Whats the key difference in symptoms between bacterial gastroenteritis and viral?
Bloody diarrhoea and fevers - Bacterial
Watery diarrhoea - Viral
How long do you suffer from Gastroenteritis
2-7 days (usually self resolves after 2-3 days).
what is a serious complication of gastroenteritis?
Dehydration (noted by increase na+ and creatinine in blood test) + pale motteled skin, hypotension, reduced skin turgor.
Do you give antibiotics for gastroenteritis?
No - not usually. just practice hygiene do not go to public places until 48 hours after the last vomiting/diarrhoea episode Oral hydration and fruit juice sips introduce normal diet slowly.
Whats the difference between gastroenteritis and gastritis?
Gastroenteritis - Watery diarrhoea, nausea and vomiting (Gastric irritation and small intestine irriation.
Gastritis - errosion or non errosive irritation of the stomach mucosa - Leads to dyspepsia and epigastric pain.
When asking history question for gastroenteritis what is important?
Drugs history - Antibiotic use, or PPI treatment
Travel history - Foreign non western countries.
What timeframe is considered chronic diarrhoea?
> 4 weeks
what timeframe is considered acute diorrhoea?
< 4 weeks. less than,
Whats the difference between organic and functional diarrhoea?
Organic - bloody, fevers, wakes you up at night, does not resolve on fasting, weight loss and severe abdominal cramps, nocturnal diarrhoeah (IBD, Coeliac disease, pancreatitis) large volume
Functional - triggered by stress, relieved on fasting, no weight loss, (examples - IBS, Lactose intolerance, food allergies, alcohol/drugs) small volume
Whats the difference between diarrhoea from the small bowel vs large bowel?
Small intestine - yellow/gray - low frequency but high load
Large bowel - bloody/mucus - high frequency but low load
Causes of chronic diarrhoea?
Coeliac (can occur when older)
IBD
IBS
Colorectal cancer
Causes of bloody acute diarrhoea?
Bacterial - Campylobacter jejuni (this is most common isolated in gp), Shigella, E.coli, C.diff, Salmonella
Viral - Cytomegolovirus
Parasites- Schistosomiasis
Most common infectious causes of acute diarrhoea?
Sapovirus
noravirus
rotavirus
Campylobacter infection
What are the time differences for viral, bacterial and protoza based diarrhoea?
Viral diarrhoea lasts around 2–3 days.
Untreated bacterial diarrhoea has a duration of around 3–7 days.
Protozoal diarrhoea can be present for weeks to months without treatment.