paeds Flashcards
(450 cards)
Paediatric basic life support - algorithm
unresponsive? shout for help open airway look, listen, feel for breathing give 5 rescue breaths check for signs of circulation 15 chest compressions:2 rescue breaths
compression:ventilation ratio: lay rescuers should use a ratio of 30:2. If there are two or more rescuers with a duty to respond then a ratio of 15:2 should be used
age definitions: an infant is a child under 1 year, a child is between 1 year and puberty
What score if used to assess the health of a new-born baby?
Apgar score
A score of 0-3 is very low score, between 4-6 is moderate low and between 7 - 10 means the baby is in a good state
In a newborn who hasn’t cried irate when should you airway suction? What could happen if you do?
Airway suction should not be performed unless there is obviously thick meconium causing obstruction, as it can cause reflex bradycardia in babies.
When should CPR be performed on a newborn who hasn’t cried?
CPR should only be commenced at a HR < 60bpm.
How to reduce risk of getting chest infections in a CF patient?
Patients with cystic fibrosis should minimise contact with each other due to the risk of cross-infection
CF management
Management of cystic fibrosis (CF) involves a multidisciplinary approach
Key points
- regular (at least twice daily) chest physiotherapy and postural drainage. Parents are usually taught to do this. Deep breathing exercises are also useful
- high calorie diet, including high fat intake
- patients with CF should try to minimise contact with each other to prevent cross infection with Burkholderia cepacia complex and Pseudomonas aeruginosa
- vitamin supplementation
- pancreatic enzyme supplements taken with meals
- heart and lung transplant
Lumacaftor/Ivacaftor (Orkambi)
- is used to treat cystic fibrosis patients who are homozygous for the delta F508 mutation
- lumacaftor increases the number of CFTR proteins that are transported to the cell surface
- ivacaftor is a potentiator of CFTR that is already at the cell surface, increasing the probability that the defective channel will be open and allow chloride ions to pass through the channel pore
What causes chronic diarrhoea in infants?
- most common cause in the developed world is cows’ milk intolerance
- toddler diarrhoea: stools vary in consistency, often contain undigested food
- coeliac disease
- post-gastroenteritis lactose intolerance
Gastroenteritis in children
Gastroenteritis
- diarrhoea
- main risk is severe dehydration
- most common cause is rotavirus - typically accompanied by fever and vomiting for the first 2 days. The diarrhoea may last up to a week
- treatment is rehydration
What is a common complication of viral gastroenteritis?
Transient lactose intolerance is a common complication of viral gastroenteritis
What is the most common cause of inherited neurodevelopment delay?
Fragile X syndrome
Fragile X syndrome - features and diagnosis
Fragile X syndrome is a trinucleotide repeat disorder.
Inherited in an autosomal dominant fashion
Features in males
- learning difficulties
- large low set ears, long thin face, high arched palate
- macroorchidism (abnormally large testes)
- hypotonia - joint laxity
- learning difficulties - autism is more common, and ADHD
- mitral valve prolapse
- past history of recurrent otitis media
Features in females (who have one fragile chromosome and one normal X chromosome) range from normal to mild
Diagnosis
- Fragile X syndrome tends to present around the time of puberty.
- can be made antenatally by chorionic villus sampling or amniocentesis
- analysis of the number of CGG repeats using restriction endonuclease digestion and Southern blot analysis
What is Cow’s milk protein intolerance/allergy? features and diagnosis
Cow’s milk protein intolerance/allergy (CMPI/CMPA) occurs in around 3-6% of all children and typically presents in the first 3 months of life in FORMULA-FED infants, although rarely it is seen in exclusively breastfed infants.
Both immediate (IgE mediated) and delayed (non-IgE mediated) reactions are seen. The term CMPA is usually used for immediate reactions and CMPI for mild-moderate delayed reactions.
Features
- regurgitation and vomiting
- diarrhoea
- urticaria, atopic eczema
- ‘colic’ symptoms: irritability, crying
- wheeze, chronic cough
- rarely angioedema and anaphylaxis may occur
Diagnosis is often clinical (e.g. improvement with cow’s milk protein elimination). Investigations include:
- skin prick/patch testing
- total IgE and specific IgE (RAST) for cow’s milk protein
Cow’s milk protein intolerance/allergy- Management
If the symptoms are severe (e.g. failure to thrive) refer to a paediatrician.
Management if formula-fed
- extensive hydrolysed formula (eHF) milk is the first-line replacement formula for infants with mild-moderate symptoms
- amino acid-based formula (AAF) in infants with severe CMPA or if no response to eHF
- around 10% of infants are also intolerant to soya milk
Management if breastfed
- continue breastfeeding
- eliminate cow’s milk protein from maternal diet. Consider prescribing calcium supplements for breastfeeding mothers whose babies have, or are suspected to have, CMPI, to prevent deficiency whilst they exclude dairy from their diet
- use eHF milk when breastfeeding stops, until 12 months of age and at least for 6 months
CMPI usually resolves in most children
- in children with IgE mediated intolerance around 55% will be milk tolerant by the age of 5 years
- in children with non-IgE mediated intolerance most children will be milk tolerant by the age of 3 years
- a challenge is often performed in the hospital setting as anaphylaxis can occur.
Pyloric stenosis
Pyloric stenosis typically presents in the second to fourth weeks of life with vomiting, although rarely may present later at up to four months. It is caused by hypertrophy of the circular muscles of the pylorus.
Epidemiology incidence of 4 per 1,000 live births 4 times more common in males 10-15% of infants have a positive family history first-borns are more commonly affected
Features
- ‘projectile’ vomiting, typically 30 minutes after a feed
- constipation and dehydration may also be present
- a PALPABLE MASS may be present in the upper abdomen
- hypochloraemic, hypokalaemic alkalosis due to persistent vomiting
Diagnosis is most commonly made by ultrasound.
Management is with Ramstedt pyloromyotomy.
What is the commonest cyanotic congenital heart condition after birth?
Tetralogy of Fallot (TOF)
-a few weeks to months after birth
Tetralogy of Fallot
It typically presents at around 1-2 months, although may not be picked up until the baby is 6 months old
TOF is a result of anterior malalignment of the aorticopulmonary septum. The four characteristic features are:
- ventricular septal defect (VSD)
- right ventricular hypertrophy
- right ventricular outflow tract obstruction, pulmonary stenosis
- overriding aorta
The severity of the right ventricular outflow tract obstruction determines the degree of cyanosis and clinical severity
Other features
- cyanosis - hypercyanotic spells with episodic, increasing cyanosis which typically occurs when the baby is crying and breathing deeply and rapidly
- causes a right-to-left shunt
- ejection systolic murmur due to pulmonary stenosis (the VSD doesn’t usually cause a murmur)
- a right-sided aortic arch is seen in 25% of patients
- chest x-ray shows a ‘boot-shaped’ heart, ECG shows right ventricular hypertrophy
Management
- surgical repair is often undertaken in two parts
- cyanotic episodes may be helped by beta-blockers to reduce infundibular spasm
right parasternal heave reflects what?
right ventricular hypertrophy
Biliary atresia - types, signs, investigations, management, complications
Biliary atresia is a paediatric condition involving either obliteration or discontinuity within the extrahepatic biliary system, which results in an OBSTRUCTION IN FLOW OF BILE. This results in a neonatal presentation of CHOLESTASIS in the first few weeks of life. The pathogenesis of biliary atresia is unclear, however, infectious agents, congenital malformations and retained toxins within the bile are all contributing factors.
Epidemiology
- Extrahepatic biliary atresia is more common in females than males
- Biliary atresia is unique to neonatal children: The perinatal form presents in the first two weeks of life, and the postnatal form presents within the first 2-8 weeks of life
- Biliary atresia occurs in 1 in every 10,000-15,000 live births
Types:
- Type 1: The proximal ducts are patent, however, the common duct is obliterated
- Type 2: There is atresia of the cystic duct and cystic structures are found in the porta hepatis
- Type 3: There is atresia of the left and right ducts to the level of the porta hepatis, this occurs in >90% of cases of biliary atresia
Patients typically present in the first few weeks of life with:
- Jaundice extending beyond the physiological two weeks
- Dark urine and pale stools
- Appetite and growth disturbance, however, may be normal in some cases
Signs:
- Jaundice (present > 14 days of age)
- Hepatomegaly with splenomegaly
- Abnormal growth
- Cardiac murmurs if associated cardiac abnormalities present
Investigations:
- Serum bilirubin including differentiation into conjugated and total bilirubin: Total bilirubin may be normal, whereas conjugated bilirubin is abnormally high
- Liver function tests (LFTs) including serum bile acids and aminotransferases are usually raised but cannot differentiate between biliary atresia and other causes of neonatal cholestasis
- Serum alpha 1-antitrypsin: Deficiency may be a cause of neonatal cholestasis
- Sweat chloride test: Cystic fibrosis often involves the biliary tract
- Ultrasound of the biliary tree and liver: May show distension and tract abnormalities
- Percutaneous liver biopsy with intraoperative cholangioscopy
Management: - Surgical intervention is the only definitive treatment for biliary atresia: Intervention may include dissection of the abnormalities into distinct ducts and anastomosis creation A hepatoportoenterostomy (HPE) can be performed. This is also known as Kasai portoenterostomy and it allows bile drainage - Medical intervention includes antibiotic coverage and bile acid enhancers following surgery Ursodeoxycholic acid may be given as an adjuvant following surgical intervention
Complications:
- Unsuccessful anastomosis formation
- Progressive liver disease
- Cirrhosis with eventual hepatocellular carcinoma
Prognosis:
- Prognosis is good if surgery is successful
- In cases where surgery fails, liver transplantation may be required in the first two years of life
What is roseola infantum and the features?
COMMON VIRAL ILLNESS Roseola infantum (also known as exanthem subitum, occasionally sixth disease) is a common disease of infancy caused by the human HERPES virus 6 (HHV6). It has an incubation period of 5-15 days and typically affects children aged 6 months to 2 years.
Features:
- high fever: lasting a few days (3 days), followed later by a maculopapular rash (4th day, - typically starts on the trunk and limbs- which is different to chickenpox which is usually central), following the resolution of the fever (the fever is typically rapid onset and can often predispose to febrile convulsions)
- Nagayama spots: papular enanthem on the uvula and soft palate
rash appears erythematous with small bumps that are merging together.
- febrile convulsions occur in around 10-15%
- diarrhoea and cough are also commonly seen
What are possible complications of HHV6 infection?
Aseptic meningitis
Hepatitis
What can biliary atresia lead to if left untreated?
liver failure and death if left untreated, caused by fibrous obstruction of the extra-hepatic biliary tree
What are the pertinent blood tests findings in biliary atresia?
Raised conjugated bilirubin, and can also show deranged liver function tests with elevated GGT more prominent than AST or ALT.
What are growing pains and what are the features?
A common presentation in General Practice is a child complaining of pain in the legs with no obvious cause. Such presentations, in the absence of any worrying features, are often attributed to ‘growing pains’. This is a misnomer as the pains are often not related to growth - the current term used in rheumatology is ‘benign idiopathic nocturnal limb pains of childhood’
Growing pains are equally common in boys and girls and occur in the age range of 3-12 years.
Features of growing pains - never present at the start of the day after the child has woken - no limp - no limitation of physical activity systemically well - normal physical examination - motor milestones normal - symptoms are often intermittent and worse after a day of vigorous activity
Meningitis B vaccine
Children in the UK have been routinely immunised against serotypes A & C of meningococcus for many years. As a result meningococcal B became the most common cause of bacterial meningitis in the UK. A vaccination against meningococcal B (Bexsero) has recently been developed and introduced to the UK market.
The Joint Committee on Vaccination and Immunisation (JCVI) initially rejected the use of Bexsero after doing a cost-benefit analysis. This descision was eventually reversed and meningitis B has now been added to the routine NHS immunisation.
Three doses are now given at:
2 months
4 months
12-13 months
If given outside of the schedule, doses should be at least 2 months apart. When given in children over the age of one, only two doses are required.
Bexsero will also be available on the NHS for patients at high risk of meningococcal disease, such as people with asplenia, splenic dysfunction or complement disorder.