Paediatrics: Gastroenterology Flashcards
what are the 3 general categories for causes of abdominal pain?
- Functional
- Medical
- Surgical
What does it mean when something is a functional disorder?
No disease process found to explain the pain (lack of pathology)
Name some medical causes of abdominal pain?
- Constipation
- UTI
- Coeliac disease
- IBD
- Abdo migraine
- Hoch-schonlein Purpura
- pyelonephritis
Name some surgical causes of abdominal pain? (4)
- Appendicitis
- Intussusception
- Bowel obstruction
- Testicular torsion
What additional causes could there be for abdominal pain in girls? (6)
- Pregnancy
- PID
- Dysmenorrhoea
- Mittelschmerz
- Ectopic pregnancy
- Ovarian torsion
name some red flags for a presentation of abdominal pain?
- Persistent or bilious vomiting
- Severe chromic diarrhoea
- Fever
- Rectal bleeding
- Weight loss
- Dysphagia
Px presenting with abdominal pain is found to anaemic. What could this indicate? (2)
- Inflammatory bowel disease
- Coeliac
(I think due to iron deficiency- failure to absorb in duodenum/proximal jejunem)
Px presenting with abdominal pain is found to have raised inflammatory markers. What could this indicate?
IBD (or infection I guess)
Px presenting with abdominal pain is found to have raised anti-TTG/ anti-EMA . What could this indicate?
coeliac
Px presenting with abdominal pain is found to have raised feacal calprotectin. What could this indicate?
IBD
Px presenting with abdominal pain is found to have positive urine dipstick . What could this indicate?
UTI
what is the most common cause of constipation?
functional
name some secondary causes of constipation? (4)
- Hirschprungs
- CF
- Hypothyroidism
- drug induced
name some symptoms of constipation? (7)
- <3 stools per week (though this can be normal)
- hard stools that are hard to pass
- Rabit dropping stools
- Straining
- Abdo pain
- Rectal bleeding
- Hard stool palpate in abdo
What lifestyle factors can contribute to constipation ? (5)
- Habitually not opening bowels
- Low fibre diet
- Poort fluid intake
- Sedentary lifestyle
- Pscycosocial problems/stress
Describe how constipation causes desensitisation of the rectum and what this causes?
ignore sensation of full rectum => loses sensation => more infrequent bowel openings => faecal impaction => encopresis
Constipation red flag: what could not passing meconium in first 48 hrs indicate? (2)
- CF
- Hirschprungs disease
Constipation red flag: what could constipation plus neurological symptoms indicate?
CP
Constipation red flag: what could constipation plus vomiting indicate? (2)
- Hirschprungs disease
- Bowel obstruction
Constipation red flag: what could constipation plus ribbon stool indicate?
anal stenosis
Constipation red flag: what could constipation plus failure to thrive indicate? (3)
- Coeliac disease
- Hypothyroidism
- Safeguarding concern
Constipation red flag: what could constipation plus sever abdominal pain indicate?
- Intussusception
- Obstruction
What percentage of infants posset?
40%
What is Gastro-Oesophageal Reflux?
It is where the contest of the stomach reflux through the lower oesophageal sphincter into the oesophagus, throat + mouth
why are babies prone to reflux?
babies have immature lower oesophageal sphincter so quite normal (as long as the baby can grow)
What pathophysiology explain GOR? (3)
- Short, narrow oesophagus
- Delayed gastric emptying
- High fluid diet
RF for GOR? (3)
- Prematurity
- Parental Hx
- Obesity
When does GOR become problematic
when symptomatic
- Chronic cough
- Hoarse cry
- Distress after feeding or reluctant to feed
- Pneumonia
- Poor weight gain
How to older children present with GOR?
similar to adults
- Heartburn
- Regurgitation
- Bloating
- Noctural cough
Causes of vomiting in babies?
- Overfeeding
- GOR
- Pyloric stenosis
- Gastritis
- Infection (UTI, Meningitis)
- raised ICP
what advice can you give for GORD?
- Small meals
- Do not overfeed
- Burp the baby
- Keep upright after feeding
Apart from advice, what is the management for GORD?
- Gaviscon mixed with water immediately after feeds
- PPI
what percentage of GOR presentations will spontaneously resolve within first yr of life?
90%
pyloric stenosis pathophysiology?
Narrowing of the pylorus => gastric outlet restriction => prevents normal passage of food from stomach to duodenum => powerful peristalsis => food return to oesophagus => powerful projectile vomiting
What causes pyloric stenosis?
hypertrophy and thickening of pylorus => stenosis
what are where is the pyloric sphincter?
ring off mouth muscle that forms canal between stomach + duodenum
pyloric stenosis RF?
- Male
- FHx
Describe the presentation of pyloric stenosis? at what age?
usually presents in first few weeks (4-6 weeks)
- Hungry baby that its hit, pale + failure to thrive
- non-bilious PROJECTILE vomiting after every feed
- Weight loss dehydration
What might be found on examination of a patient with pyloric stenosis? (2)
- Visible peristalsis
- Palpable olive-sized pyloric mass
what would the blood gas of a Px with pyloric stenosis show (+ electrolytes) ? explain
- Hypochloric + hypokalaemia metabolic alkalosis
- Vomit HCl => increase pH
- low H+ => kidneys exchange K to retain H+ => hypokalaemia
What investigations for pyloric stenosis ? god standard?
- Blood test
- Abdominal US (gold standard):
what would be seen on AUSS in pyloric stenosis?
hypertrophic pyloric muscles
Management of pyloric stenosis?
Surgical - Laparoscopic pyeloromyotomy (widen canal of pylorus)
What is acute gastritis ? presents with?
Inflammation of the stomach
- Presents with nausea + vomiting
What is enteritis? Presents with?
Inflammation of the intestines
- Presents with diarrhoea
What is gastroenteritis? presents with?
Inflammation all the way form the stomach to the intestines so presents with Nausea + vomiting + diarrhoea
Usual prognosis of gastroenteritis ?
very common and usually self limiting
Most common cause of gastroenteritis ?
usually viral (norovirus or rotavirus)
Name a common bacterial cause of gastroenteritis ?
E.Coli
what strain of E. coli is particularly concerning? why?
E.Coli 0147
- produces Shiga toxin
what does the Shiga toxin cause? complication? produces by what organism ?
produced by E.Coli + shigella
- abdo cramps + bloody diarrhoea
- Haemolytic uraemic syndrome
what determines if a patient needs to be admitted with gastroenteritis s?
Hydration
- Need to work out if Px can self hydrate of if IV fluids are required
Name some things to consider for a diarrhoea differential?
- Infection
- IBD
- Coeliac
- Lactose intolorance
- Coeliac
- CF
- IBS
- Abx
Management of Gastroenteretitis ?
- Immediate isolate to preven spear to other Px, barrier nursing, children stay off school
- Stool culture
- Maintain good hydration: fluid challenge, IV
- Usually viral so self limiting
When are gastroenteritis patients given Abx?
only given to Px at risk of ocmplciaitons or once causative ogaisn has been identified
name some complications of gastroenteritis?
- Lactose intolorance
- IBS
- Reactive arthritis (Reiters syndrome)
- Guillian barre syndrome
A patient presents after having eaten leftover fried rice left out at room temp and then developed abdo cramping + vomiting + watery diarrhoea. What is the likely pathogen?
Bacillus cereus
What is Coeliac disease?
Lifelong gluten sensitive autoimmune disease of the small intestine (leading to inflam of small intestine)
Describe the pathophysiology of coeliac disease?
autoantibodies are produced in response to exposure to gluten => target epithelial cells of small intestine
Which 2 autoantibodies are associated with coeliac disease? what type of antibody?
IgA antibodies
- Anti-tissue transflutaminase (anti-TTG)
- Anti-endomysial (Anti-EMA)
Where does the inflammation in coeliac disease mainly effect?
jejunum
What genetic predisposition is associated with coeliac disease?
HLA-DQ2/DQ8
what is the chance of of PX to develop coeliac disease if they have the genetic predisposition ? if they don’t?
HLA-DQ2/DQ8
- negative value is almost 100%
- most ppl with these genes do NOT develop coeliac
what is the presentation of coeliac disease?
- Failure to thrive
- Diarrhoea
- Fatigue
- Mouth ulcers
What other disease should you always test for if you consider coeliac disorder?
type 1 diabetes
(they are closely linked)
How do you diagnose coeliac disease? gold standard?
while patient is on gluten-containing diet
- Check total IgA levels
- Anti TTG and anti-EMA
- Endoscopy and duodenal biopsy
Why test total IgA levels for coeliac diagnosis?
to exclude IgA deficiency (to make sure result will be valid)
What will be seen on duodenal biopsy in coeliac disease?
- Crypt hypertrophy
- Villous atrophy
Coeliac management ?
lifelong gluten free diet
What cell mediated autoumme response occurs in coeliac disease?
T-cell mediated
What is IBD?
Inflammatory Bowel Disease
- Umbrella term for 2 main disease causing inflammation of GI tract (Crohn’s, Ulcerative Colitis)
What pneumonic helps remember symptoms of Crohns ?
crows NESTS
What pneumonic helps remember details of UC?
U-C-CLOSEUP
What does NESTS Stand for? which condition?
Crohns
- No blood or mucus (less common)
- Entire GI tract (gum to bum)
- Skip lesions
- Transmural (full thickness inflam), Terminal ileum
- Smoking is RF (Don’t set the nest on fire)