Gastroenterology ||| Flashcards
What red flag symptoms should you check for in a vomiting child (11)?
- Bile-stained vomit
- Haematemesis
- Projectile vomiting in first few weeks of life
- Vomiting at the end of paroxysmal coughing
- Abdominal tenderness/pain on movement
- Abdominal distension
- Hepatosplenomegaly
- Blood in stool
- Severe dehydration, shock
- Bulging fontanelle or seizures
- Faltering growth
What is gastro-oesophageal reflux? What are its causes in infancy (4)?
The involuntary passage of gastric contents into the oesophagus.
Causes:
- Inappropriate relaxation of the lower oesophageal sphincter as a result of functional immaturity.
- Predominantly fluid diet
- A mainly horizontal posture
- A short intra-abdominal length of oesophagus
What are the symptoms of gastro-oesophageal reflux (2)?
Recurrent regurgitation
Vomiting
When does gastro-oesophageal reflux become GORD?
When the condition becomes a significant problem
What are the complications of gastro-oesophageal reflux (5)?
- Faltering growth from severe vomiting
- Oesophagitis - haematemesis, discomfort on feeding/heartburn, iron-deficiency anaemia
- Recurrent pulmonary aspiration - recurrent pneumonia, cough or wheeze, apnoea in preterm infants
- Dystonic neck posturing (Sandifer syndrome)
- Apparent life-threatening events/SIDs
How is gastro-oesophageal reflux managed (3)?
- non-medical in uncomplicated reflux
- parental reassurance, adding inert thickening agents to feeds and smaller more frequent feeds - Medical in significant GORD
- acid suppression with hydrogen receptor antagonist (ranitidine) or proton-pump inhibitors (omeprazole) - Surgical in children with complications unresponsive to intensive medical treatment or oesophageal stricture.
- a nissen fundoplication
What is infant colic? At what age does it occur?
Paroxysmal, inconsolable crying or screaming often accompanied by drawing up of the knees and passage of excessive flatus several times a day.
Typically occurs in the first few weeks of life.
How is infant colic managed (2)?
- The condition is benign so support and reassurance should be given to parents.
- If severe and persistent, it may be due to a cow’s milk protein allergy and a 2-week trial of a protein hydrolysate (cows milk protein free) formula may be considered
What is recurrent abdominal pain and how does it present?
It is defined as pain sufficient to interrupt normal activities and lasts for at least 3 months
The pain is usually periumbilical and children are otherwise entirely well.
What are frequent causes of recurrent abdo pain?
- Stress
- Functional abnormalities of gut motility
- IBS
- Constipation
- Coeliac disease (less common)
- Abdominal migraine
- Functional dyspepsia
What is an abdominal migraine?
What questions in the history could you ask to check for this (4)?
Abdominal pain associated with headaches
- Where is the pain?
- Presents as an attack of the midline - Associated symptoms
- vomiting and facial pallor - Any family or personal history of migraines
- yes - How often do you get it?
- can have a few weeks without symptoms, then it comes on for several hours-days
What is an IBS?
What questions in the history could you ask to check for this (7)?
Altered GI motility and an abnormal sensation of intra-abdominal events
- Is there any family history of IBS?
- yes - Where is the pain
- peri-umbilical - is it relieved by defecation?
- yes - do you often have explosive, loose or mucousy stools?
- often yes - Do you have bloating?
- often yes - Is there a feeling of incomplete evacuation?
- often yes - What are bowel movements like?
- often constipated, alternating with normal/loose stools
What questions in the history could you ask to check for duodenal ulcers (4)?
- Where is the pain?
- epigastric, and radiates to back - Does the pain ever wake you up at night?
- yes - Is there any history of peptic ulceration in a first-degree relative?
- often yes - Are there any other associated symptoms?
- nausea, early satiety, bloating, postprandial vomiting, delayed gastric emptying
What are the investigations you should do when someone presents with recurrent abdominal pain (6)?
- Full history and examination - check for anal fissures
- Check child’s growth
- Urine microscopy and culture for UTI
- Abdominal US for gall stones and pelvi-ureteric junction obstruction
- Coeliac antibodies
- Thyroid function tests
What is the most frequent cause of gastroenteritis in developed countries?
What other viruses can cause outbreaks (5)?
Rotovirus
Adenovirus, norovirus, calicivirus, coronavirus, astrovirus
What symptom can indicate a bacterial cause of gastroenteritis?
What are the bacteria that can cause gastroenteritis and their associated symptoms (3)?
Blood in stools
- Campylobacter jejuni - severe abdo pain
- Shigella and salmonella- blood and pus in stool, pain and tenesmus. Shigella may give a high fever
- Cholera and E.coli infection - profuse, rapidly dehydrating diarrhoea
What parasites cause gastroenteritis (2)?
Giardia and Cryptosporidium
How does gastroenteritis present (2)?
Sudden change to loose or watery stools often accompanied by vomiting
What is the most serious complication of gastroenteritis?
Dehydration leading to shock
What groups of children are at an increased risk of dehydration (5)?
- infants, particularly those under 6 months or with low birthweight
- if they have passed 6 or more diarrhoeal stools in the previous 24 hours
- if they have vomited 3 or more times in the previous 24 hours
- if they have been unable to tolerate or not been offered extra fluids
- if they have malnutrition
How is the degree of dehydration assessed (3)?
- no clinically detectable dehydration (usually <5% loss of body weight)
- clinical dehydration (usually 5-10% loss of body wight)
- shock (usually >10% loss of body weight)
How is dehydration managed (3)?
- oral rehydration, continue breastfeeding
- if shock - urgent admission, iv fluids
- Abx only indicated if there is suspected/confirmed sepsis
What are the clinical features of shock from dehydration in an infant (8)?
- Decreased consciousness
- Sunken fontanelle
- Dry mucous membranes
- Eyes sunken and tearless
- Tachypoea
- Prolonged cap refill time
- reduced urine output
- cold extremities
How do you define malabsorption?
Disorders affecting the digestion or absorption of nutrients
How does malabsorption present (3)?
- Abnormal stools - float and are smelly
- Poor weight gain or faltering growth in most but not all cases
- Specific nutrient deficiencies, either singly or in combination
What is the pathophysiology of coeliac disease?
An enteropathy in which the gliadin fraction of gluten and other related prolamines in wheat, barley and rye provoke a damaging immunological response in the proximal SI mucosa.
As a result, the rate of migration of enterocytes from the crypts is massively increased but insufficient to compensate for increased cell loss from villous tips.
Villi become shorter and then absent, leaving a flat mucosa.
What is the presentation of coeliac disease (5) and at what age does it usually present at?
- Faltering growth
- Abdominal distension
- Buttock wasting
- Abnormal stools
- General irritability
Presents at 8-24 months of age after introduction of wheat-containing weaning foods
How is coeliac disease diagnosed (3)?
- specific serology screening tests i.e. anti-tTG, EMA and IgA
PLUS - demonstration of increased intraepithelial lymphocytes and variable degree of villous atrophy and crypt hypertrophy on SI biopsy performed endoscopically
PLUS - Resolution of symptoms and catch-up growth upon gluten withdrawal.
How is coeliac disease managed (4)?
- Removal of all products containing wheat, rye and barely.
- Supervision by a dietician is essential.
- A gluten challenge can be done later in childhood to demonstrate continuing susceptibility of the SI mucosa to damage by gluten.
- Annual blood testing can be considered
What is toddler diarrhoea/chronic non-specific diarrhoea? How does it present (2)?
The most common cause of persistent loose stools in preschool children.
- Characteristically, the stools are of varying consistency, sometimes well formed, sometimes explosive and loose.
- The presence of undigested vegetables in stools is common.
What are the causes of toddler diarrhoea/chronic non-specific diarrhoea (3)?
- Excessive ingestion of fruit juice
- Undiagnosed coeliac disease
- temporary cow’s milk allergy following gastroenteritis
What is the management of cow’s milk allergy?
Trial of a cow’s milk protein free diet
What are the presenting features of Crohn’s (4)?
- General ill health
- fever
- lethargy
- weight loss - Growth failure
- Intestinal symptoms
- abdominal pain
- diarrhoea
- weight loss - Extra-intestinal symptoms
- oral lesions or perianal skin tags
- arthralgia
- erythema nodosum
- uveitis
What is the pathology of Crohn’s? Which part of the bowel does it usually affect?
It is a transmural, focal, subacute or chronic inflammatory disease.
It usually affects the distal ileum and proximal colon. Initially, they become acutely inflamed and thickened, subsequently, the bowel forms strictures and fistulae can form between the loops of bowel or between bowel+skin/other organs
What are the clinical signs of Crohn’s (3)?
- Presence of raised inflammatory markers (platelet count, erythrocyte sedimentation rate, CRP)
- iron-deficiency anaemia
- low serum albumin
What is the management of Crohn’s (4)?
- Immunosuppressant medication to obtain remission
- azathioprine, mercaptopurine, methotrexate - Anti-tumour necrosis factor agents when conventional treatments don’t work
- infliximab or adalimumab - Nutritional therapy
- Surgery for complications of Crohn’s i.e. obstruction, fistulae, abscess or severe localised disease.