Gatroenterology Flashcards
Medical causes of abdominal pain.
- constipation
- UTI
- coeliac disease
- IBD
- IBS
- mesenteric adenitis
- abdominal migraine
- pyelonephritis
- Henoch-Schonlein purpura
- tonsilitis
- DKA
- infantile colic
Medical causes of abdominal pain (F specific).
- dysmenorrhoea
- Mittelschmerz
- ectopic pregnancy
- PID
- ovarian torsion
- pregnancy
Surgical causes of abdominal pain.
- appendicitis
- intussusception
- bowel obstruction
- testicular torsion
Red flags for serious abdominal pain.
- persistent vomiting
- severe chronic diarrhoea
- fever
- rectal bleeding
- weight loss / growth delay
- dysphagia
- night time pain
- abdominal tenderness
What is recurrent abdominal pain?
A common diagnosis in children aged 5 years and above, that is made when a child presents with repeated episodes of abdominal pain without an identifiable underlying cause.
The pain is described as non-organic or functional.
Associations of recurrent abdominal pain.
Often corresponds to stressful life events, such as loss of a relative or bullying.
These events cause increased sensitivity and inappropriate pain signals from the visceral nerves in response to normal stimuli.
Management of recurrent abdominal pain.
- distracting the child from the pain
- encourage parents not to ask about or focus on the pain
- advice about sleep, regular meals, healthy balanced diet, staying hydrated, exercise
- probiotic supplements
- avoid NSAIDs (e.g. ibuprofen)
- address psychosocial triggers
- support from school counsellor or child psychologist
Pain characteristic of abdominal migraine.
Episodes of central abdominal pain lasting more than 1 hour, with normal examination.
Associated symptoms / signs in abdominal migraine.
- nausea and vomiting
- anorexia
- pallor
- headache
- photophobia
- aura
Management of abdominal migraines - acute attack.
- low stimulus environment
- paracetamol
- ibuprofen
- sumatriptan
Management of abdominal migraines - prevention.
Pizotifen is a serotonin agonist that is used as prevention for abdominal migraine.
It needs to be withdrawn slowly when stopping, as it is associated with withdrawal symptoms such as depression, anxiety, poor sleep and tremor.
Presentation of constipation.
- less than 3 stools per week
- hard stools that are difficult to pass
- rabbit dropping stools
- straining and painful passage of stools
- abdominal pain
- retentive posturing
- rectal bleeding
- hard stool palpable in abdomen
- loss of the sensation of the need to open the bowels
- overflow diarrhoea
Define encopresis.
Faecal incontinence
When is encopresis considered to be pathological?
After 4 years of age.
Commonest cause of encopresis.
Usually a sign of constipation, where the rectum becomes stretched and looses sensation.
Large hard stools remain in the rectum, and only loose stools are able to bypass the blockage and leak out, causing soiling.
Secondary causes of encopresis.
- Spinal bifida
- Hirschprung’s disease
- cerebral palsy
- learning disability
- psychosocial stress
- abuse
Lifestyle factors that can result in constipation.
- low fibre diet
- poor fluid intake and dehydration
- sedentary lifestyle
- psychosocial problems (i.e. difficult home / school environment)
What is desensitisation of the rectum in constipation?
Patients develop a habit of not opening their bowels and ignoring the sensation of a full rectum.
Over time, this causes faecal impaction and damage to the nerves, causing desensitisation.
The longer this goes on, the more difficult it is to treat the constipation and reverse the problem.
Secondary causes of constipation.
- Hirschsprung’s disease
- cystic fibrosis
- hypothyroidism
- spinal cord lesions
- sexual abuse
- intestinal obstruction
- anal stenosis
- cows milk intolerance
What could constipation, associated with not passing meconium within 48 hours of birth be associated with in children?
- cystic fibrosis
- Hirschsprung’s disease
What could constipation, associated with neurological signs or symptoms be associated with in children?
- cerebral palsy
- spinal cord lesion
Particularly in the lower limbs.
What could constipation, associated with vomiting be associated with in children?
- intestinal obstruction
- Hirschsprung’s disease
What could constipation, associated with ribbon stool be associated with in children?
- anal stenosis
What could constipation, associated with abnormal anus be associated with in children?
- anal stenosis
- inflammatory bowel disease
- sexual abuse
What could constipation, associated with abnormal lower back or buttocks be associated with in children?
- spinal bifida
- spinal cord lesion
- sacral agenesis
What could constipation, associated with failure to thrive be associated with in children?
- coeliac disease
- hypothyroidism
- safeguarding
What could constipation, associated with acute severe abdominal pain and bloating be associated with in children?
- intestinal obstruction
- intussusception
Complications of constipation.
- pain
- desensitisation
- anal fissures
- haemorrhoids
- overflow and soiling
- psychosocial morbidity
What investigations are required to diagnose idiopathic constipation?
Can be made without investigations, provided red flags are considered.
Management of idiopathic constipation.
- high fibre diet
- good hydration
- start laxatives (movicol first line)
- encourage and praise visiting the toilet
Faecal impaction may require a disimpaction regime, with high doses of laxatives at first.
What is gastro-oesophageal reflux (GORD) in children?
Incompetence of the lower oesophageal sphincter allows stomach reflux into the oesophagus, throat and mouth.
Why is GORD common in babies?
Immaturity of the lower oesophageal sphincter allows stomach contents to easily reflux into the oesophagus.
It is normal for a baby to reflux feeds, provided there is normal growth and the baby is otherwise well.
90% of infants stop having reflux by 1 year.
Signs of problematic reflux.
- chronic cough
- hoarse cry
- distress, crying or unsettled after feeding
- reluctance to feed
- pneumonia
- poor weight gain
Causes of vomiting in children.
- overfeeding
- GORD
- pyloric stenosis
- gastritis / gastroenteritis
- appendicitis
- UTI
- tonsillitis
- meningitis
- intestinal obstruction
- bulimia nervosa
Red flag vomiting symptoms in children.
- not keeping down any feed
- projectile vomiting
- bile stained vomit
- haematemesis or malaena
- abdominal distention
- reduced consciousness, bulging fontanelle, neurological signs
- respiratory symptoms
- blood in the stools
- signs of infection
- rash, angioedema and other signs of allergy
- apnoeas
Home management of GORD in children.
- small, frequent meals
- burping regularly to help milk settle
- not over-feeding
- keep the baby upright after feeding
Medical management of GORD in children.
- Gaviscon mixed with feeds
- thickened milk or formula
- PPIs (e.g. omeprazole)
What is Sandifer’s syndrome?
A rare complication of GORD causing:
- torticollis: forceful contraction of the neck muscles causing twisting of the neck
- dystonia: abnormal muscle contractions causing twisting movements, arching of the back or unusual postures
The condition tends to resolve as the reflux is treated or improves.
Features of pyloric stenosis.
Presents within the first few weeks of life:
- hungry baby
- failure to thrive
- projectile vomiting
Capillary blood gas analysis of pyloric stenosis.
Hypochloric metabolic alkalosis.
The baby is vomiting hydrochloric acid from the stomach.
Examination findings of pyloric stenosis.
Firm, round mass felt in the upper abdomen.
Peristalsis can often be seen by observing the abdomen.
Diagnosis of pyloric stenosis.
Abdominal ultrasound to visualise the thickened pylorus.
Management of pyloric stenosis.
Laparoscopic pyloromyotomy.
An incision is made in the smooth muscle of the pylorus to widen the canal.
Prognosis is excellent following the operation.
Differential diagnoses for diarrhoea.
- gatroenteritis
- IBD
- lactose intolerance
- coaliac disease
- cystic fibrosis
- Toddler’s diarrhoea
- IBS
- medications (e.g. abx)
What are the common viral causes of gastroenteritis in children?
- rotavirus
- norovirus
Highly contagious and common.
How is E. coli spread?
- faeco-oral route
- unwashed salads
- contaminated water