Alimentary System Flashcards
What type of condition is Coeliac disease
Autoimmune
What 2 antibodies mediate, and can be tested to diagnose coeliac disease
Anti-TTG
Anti-EMA
Where does coeliac disease mainly effect
Jejunum
What would be seen histologically in coeliac disease
Villi Atrophy
Crypt Hypertrophy
Coeliac disease presentation
Often asymptomatic
Failure to thrive
Diarrhoea
Fatigue
Mouth ulcers
Anaemia
Dermatitis Herpetiformis
What do we test all people for who have just had a new diagnosis of type 1 diabetes
Coeliac disease
Which 2 genes are linked to coeliac disease
HLA-DQ2
HLA-DQ8
What should people with coeliac disease not consume
Gliadin (In gluten)
Why is it important to also test total immunoglobulin A when testing for coeliac antibodies
Patients sometimes have an IgA deficiency so their Anti-TTG and Anti-EMA fall within the normal range
What do we do if a suspected coeliac patient has an IgA deficiency
Test IgG version
Endoscopy + Biopsy
How is coeliac disease diagnosed
WHILE STILL EATING GLUTEN:
-Total IgA
-Anti-TTG + Anti-EMA antibodies
-Endoscopy + biopsy
Which diseases are associate with coeliac disease
Type 1 diabetes
Thyroid disease
Autoimmune Hepitits
Primary biliary cirrhosis
Primary sclerosing cholangitis
Complications of untreated coeliac disease
Vitamin deficiency + anaemia
Osteoporosis
Ulcerative jejunitis
Enteropathy-associated T-cell-lymphoma
Non-Hodgkin Lymphoma
Small bowel adenocarcinoma
How is coeliac disease treated
Gluten free diet (completely cures disease)
What is refractory coeliac disease
Symptoms of coeliac disease continue even after adhering to a strictly gluten-free diet.
Which nerves maintain pelvic floor continence
C2,3,4 stops the bowel hitting the floor
How can you tell a colostomy apart from ileostomy
Ileostomy stoma: spouted appearance, right ileac fossa
Colostomy stoma: flush with skin, left ileac fossa
Signs and symptoms of bowel obstruction
Abdominal distension
Absolute constipation
Vomiting
Abdominal pain
What is dyspepsia
Group of symptoms:
-Pain/discomfort in abdomen
-Anorexia
-Nausea +/- vomiting
-Bloating
-Early satiety
-Heartburn
What drugs can cause dyspepsia
NSAIDs
Steroids
Biphosphonates
Ca channel antagonists
Nitrates
Theophyllines
What lifestyle aspects can cause dyspepsia
Alcohol
Diet
Smoking
Exercise
Weight loss
What investigations do we do for dyspepsia
Bloods:
-FBC
-Ferretin
-LFTs
-U&Es
-Calcium
-Glucose
-Coeliac serology
When do we refer for a endoscopy with dyspepsia
ALARMS
Anorexia
Loss of weight
Anaemia
Recent onset
Melaena/Heamatemesis or Mass
Swallowing problems
Treatment for H.Pylori infection
Triple therapy 7 days
-Clarithromycin
-Amoxicillin
-PPI
How is H.Pylori infection diagnosed non-invasively
Serology - IgG H.Pylori
13c/14c urea breath test
Stool antigen test (need to be off PPI for 2wks)
How is H.Pylori diagnosed invasively
Histology - biopsy
Culture of gastric biopsy
Rapid slide urea test (CLO)
Peptic ulcer symptoms
Epigastric pain
Nocturnal/hunger pain
Back pain
Nausea/vomiting
Weight loss/anorexia
Bleeding symptoms
Complications of peptic ulcers
Acute bleed
Chronic bleed
Perforation
Fibrotic stricture
Gastric outlet obstruction
Symptoms of gastric outlet obstruction
Vomit without bile
Early satiety
Dehydration + loss of HCL in vomit
Metabolic alkalosis
What can induce hepatitis
Viral
Alcohol
Drugs
How does each hepatitis spread
A&E - fecal oral
BCD - blood borne
What does HDV require to spread
Prior infection with HBV
Which variants of viral hepatitis usually resolve on there own
A&E
What is the pathology of alcoholic hepatits
Fatty change (steatohepatitis)
Treatment of end stage liver disease
Transplant
Complications of liver cirrhosis
Liver failure
Portal hypertension
Increased risk of hepatocellular carcinoma
Causes of common bile duct obstruction
Gallstones
Bile duct tumours
Benign stricture
External compression (tumours?)
Effects of common bile duct obstruction
Jaundice
No bile in duodenum
Ascending cholangitis
Secondary biliary cirrhosis
Liver cirrhosis causes
Alcohol
HBV,HCV
Autoimmune hepatitis
Primary biliary cholangitis
Metabolic disorders
-Primary haem chromatosis
-Wilson’s disease
Obesity
What are the 3 classifications of jaundice
Pre-hepatic
Hepatic
Post-hepatic
What molecule is increased in the body with jaundice
Bilirubin
Causes of pre-hepatic jaundice
Haemolysis
Hepatic causes of jaundice
Cholestasis
Intra-hepatic bile duct obstruction
Post-hepatic causes of jaundice
Cholelithiasis
Gallbladder disease
Extra-hepatic bile duct obstruction
Risk factors of gall stones
Obesity
Diabetes
What is the difference between cholecystitis and cholangitis
Cholecystitis-Gallbladder inflammation
Cholangitis - Inflammation of bile ducts
What is cholestasis
Accumulation of bile within hepatocytes
Causes of cholestasis
Hepatitis
Liver failure
3 causes of intra-hepatic bile duct obstruction
Primary biliary cholangitis
Primary sclerosing cholangitis
Liver tumours
Who does primary biliary cholangitis effect mainly
Females 9:1 Males
What LFT is raised in primary biliary cholangitis
Alkaline phosphatase
Who does primary sclerosing cholangitis mainly effect
Younger men
Functions of hepatocytes
Metabolism
Detoxification
Immune cell activation
Protein synthesis
Function of stellate cells
Store vitamin A in the liver
Function of kupffer cells
Macrophages of the liver
Functions of pit cells
NK cells of the liver
What stimulates the release of Cholecystokinin
Fat/amino acids in duodenum
What does CCK stimulate
Gastric emptying
Pancreatic enzyme secretion
Galbladder contraction
Sphincter of Oddi relaxation
What stimulates the release of Secretin
Acid in duodenum
What does secretin stimulate
Decreased gastric emptying/secretion
Increased duodenal HCO3 secretion
Increased pancreatic HCO3 secretion
Increased bile duct HCO3 secretion
Symptoms of oesophageal disease
Heartburn (reflux)
Dysphagia
Odynophagia
What investigations can we use on the oesophagus
Endoscopy
Contrast radiology (barium swallow)
pH-metry
Manometry (pressure waves)
How does hypermotility of the oesophagus appear on a Barium swallow
Corkscrew appearance
How is hypermotility of oesophagus treated
Smooth muscle relaxants
What causes hypomotility of the oesophagus
Associated with connective tissue disease:
-Diabetes
-Neuropathy
What is the cardinal feature of achalasia
Failure of LOS to relax - results in complete obstruction of the oesophagus
Pharmacological treatment of achalasia
Nitrates
Calcium channel antagonist
Endoscopic treatment of achalasia
Botulinum toxin
Pneumatic balloon dilatation
Surgical treatment of achalasia
Myotomy
3 types of oesophagectomy
Ivor Lewis
Trans-hiatal
Left thoraco-abdominal
GORD symptoms
Heartburn
Cough
Water brash
Sleep disturbance
Risk factors for GORD
Pregnancy
Obesity
Drug use
Smoking
Alcoholism
Hypomotility
Treatment of GORD
Lifestyle measures
Drugs
Anti-reflux surgery
What drugs are used in the treatment of GORD
Alginates
H2 Receptor antagonist
PPIs
Who mainly gets eosinophilic oesophagitis
Males > Females
Children + young adults
Presentation of eosinophilic oesophagitis
Dysphagia
Bolus obstruction
Eosinophilic oesophagitis treatment
Topical/swallowed cortical steroids
Dietary elimination
Endoscopic dilatation
What is the pathological change in Barret’s Oesophagus
Squamous epithelium -> columnar epithelium
What are the 3 main categories of gastritis
ABC
Autoimmune
Bacterial
Chemical
Specific signs/symptoms of autoimmune gastritis
Loss of intrinsic factor (leads to B12 deficiency)
Often seen with other autoimmune disease
Loss of specialised gastric epithelial cells
What bacteria causes bacterial gastritis usually
Helicobacter Pylori
What substances can cause chemical gastritis
Drugs - REMEMBER NSAIDs
Alcohol
Bile reflux
What is the biggest risk factor for gastric cancer
Previos H.Pylori infection
What causes peptic ulcers
Too much acid in the GIT
Complications of peptic ulcer
Bleeding: -Acute haemorrhage
-Chronic, Anaemia
Perforation: -peritonitis
Fibrosis: -obstruction
Where is vitamin B12 absorbed and how
Distal ileum after binding with intrinsic factor from the stomach
How and where is iron absorbed, and distributed
In duodenum via enterocytes
Incorporated into FERRETIN for storage
Transported in blood by TRANSFERRIN
Which nerves stimulate salivation
Cranial VII, IX
Facial nerve
Glossopharyngeal nerve
What are the fat soluable vitamins
A, D, E, K
What are the water soluable vitamins
B groups, C, folate
What are the components of saliva
99% water
Mucins
Alpha - amylase
Electrolytes
Lysozymes
Liver disease symptoms
Jaundice
Ascites
Variceal bleeding
Hepatic encephalopathy
Compensated cirrhosis presentation
Only seen after screening
Abnormal LFTs
Presentation of decompensated cirrhosis
Ascites
Hepatorenal syndrom
Variceal bleeding
Hepatic encephalopathy
Ascites treatment
Diuretics
Large volume paracentisis
TIPS
Aquaretics
Liver transplant
Hepatorenal syndrome treatment
Vasopressors:
-Terlipressin
-Octreotide
TIPSS
Liver transplant
What are the effects of alcohol on the liver
Directly toxic
Steatosis (fatty liver)
Steatohepatitis (fatty lover + inflammation)
Spontaneous bacterial peritonitis symptoms
Abdominal pain
Fever
Rigors
Spontaneous bacterial peritonitis signs
Renal impairment
Sepsis
Tachycardia
Temperature
Treatment for spontaneous bacterial bacterial peritonitis
IV Antibiotics
Ascitic fluid drainage
IV Albumin infusion (20% ALBA)
Risks for fatty liver disease
Obesity
Diabetes
Hypercholesterolaemia
Presentation of alcoholic hepatitis
Jaundice
Encephalopathy
Infection is common
Decompensated hepatic function
How is alcoholic hepatitis diagnosed
Raised bilirubin
Raised GGT and Alkaline Phosphatase
Hx of alcohol
Exclude other causes
Where is appendix pain felt
Right ileac region
What are the 2 main idiopathic inflammatory bowel diseases
Crohn’s Disease
Ulcerative Colitis
What area can ulcerative colitis be present
Limited to colon
What area can Crohn’s Disease be present
Mouth to anus
Who gets ulcerative colitis most commonly
M = F
Ages 20-30 and 70-80