Paeds Flashcards
What is the most common cause of early onset neonatal sepsis?
group B streptococcus (GBS)
also: E- coli, Coagulase-negative Staphylococcus, H influenzae Listeria monocytogenes
What class of bacteria is GBS
gram-positive
coccus
How can a neonate be infected?
ascending infection via chorioamnionitis,
perinatally via direct contact in the birth canal
haematogenous spread
When is prophylaxis given for GBS
GBS infection (e.g. a UTI) or a positive high vaginal swab in this pregnancy or a previously affected child with GBS sepsis.
What are the red flag indicators and signs of early onset neonatal infection?
Parenteral antibiotic treatment given to the woman for confirmed or suspected invasive bacterial infection (such as septicaemia) at any time during labour, or in the 24-hour periods before and after the birth
Suspected or confirmed infection in another baby in the case of a multiple pregnancy
Resp distress >4hours after birth
Seizures
Need for mechanical ventilation in a term baby
Signs of shock
What are the risk factors for early onset neonatal sepsis?
Invasive group B streptococcal infection in a previous baby
Maternal group B streptococcal colonisation, bacteriuria or infection in the current pregnancy
Intrapartum fever higher than 38°C, or confirmed or suspected chorioamnionitis
Preterm birth following spontaneous labour (before 37 weeks’ gestation)
Prelabour rupture of membranes
Suspected or confirmed rupture of membranes for more than 18 hours in a preterm birth
Parenteral antibiotic treatment given to the woman for confirmed or suspected invasive bacterial infection (such as septicaemia) at any time during labour, or in the 24-hour periods before and after the birth (Red Flag)
Suspected or confirmed infection in another baby in the case of a multiple pregnancy (Red Flag)
What are some differentials for EONS
Transient Tachypnoea of the newborn (TTN); in term babies, causes tachypnoea and increased work of breathing
Surfactant deficient lung disease / respiratory distress syndrome (RDS); especially in preterm infants can cause tachypnoea and increased work of breathing
Meconium Aspiration; can cause the baby to be born in poor condition, with respiratory distress, and may require intubation.
Haemolytic Disease of the Newborn; can present with jaundice within the first 24 hours of life.
How should EONS be investigated?
FBC, CRP, blood cultures
swabs of urine, stool etc
LP if strong suspiciono of sepsis and/or meningitis
How is EONS managed?
IV benzylpenicillin with gentamicin empirically
7 days if cultures +ve
14 days if LP +ve
What percentage of women carry GBS in their genital tract?
25%
What can cause feeding difficulties in the neonate?
neurological incoordination (e.g. Down syndrome),
severe micrognathia,
tongue-tie
cleft palate (typically milk can come down the nose).
difficulty breast feeding
Why is neonatal physiological jaundice common?
high concentration of Hb (to maximise oxygen exchange and delivery to the fetus) no longer needed, so breaks down releasing bilirubin
the immature liver is not able to conjugate the large amount of bilirubin generated from fetal red blood cells (was previously cleared by the placenta)
What is the time frame of physiological jaundice in the new born?
Starts at day 2-3, peaks day 5 and usually resolved by day 10.
What are the causes of jaundice in the newborn?
physiological:
increased RBC breakdown
immature liver
pathological: unconjugated- haemolytic disease of the newborn - rhesus/ABO incompatability infection bruising hypothyroid breast milk jaundice
conjugated- hepatitis CF - causes cholestasis choledocal cyst biliary atresia - absence of intrahepatic or extrahepatic bile ducts
What is the difference between physiological and pathological jaundice?
pathological requires further investigation or treatment. occurs before 24 hours or after 14days (21 days if born pre-term)
What are the risk factors for pathological jaundice?
prematurity, low birth weight, small for dates Previous sibling required phototherapy Exclusively breast fed Jaundice <24 hours Infant of diabetic mother
How should a newborn be examined for jaundice?
with the naked eye in bright, natural light (if possible). Examine the sclera, gums and blanche the skin
How might a baby withpathological jaundice present?
jaundiced!
Drowsy - difficult to rouse, not waking for feeds, very short feeds
Neurologically - altered muscle tone, seizures-needs immediate attention
Other: signs of infection, poor urine output, abdominal mass/organomegaly, stool remains black/not changing colour
How should a baby with pathological jaundice be investigated?
transcutaenous bilirubinometer
serum bilirubin, split bilirubin, blood group, FBC, U+E, LFTs, TFTs, DCT
blood culture, urine culture, LP
liver USS
In what situations are TCB monitoring and serum bilirubin used?
(TCB) can be used in >35/40 gestation and >24 hours old for first measurement. TCB can be used for all subsequent measurements, providing the level remains <250 µmol/L and the child has not required treatment
Serum bilirubin to be measured if <35/40 gestation, <24 hours old or TCB >250 µmol/L
What are the risks of neonatal jaundice
bilirubin crosses BBB
deposited in basal ganglia
= kernictus
causes bilirubin encephalopathy
What are the signs of kernictus
irritability
high pitched cry
coma
What are the long term consequences of kernictus
deafness
cerebral palsy
What are the treatments of neonatal jaundice?
phototherapy - if libilrubin level above treatment line
exchange transfusion - via umbilical artery or vein. Indicated when there are clinical features and signs of acute bilirubin encephalopathy or the level/rate of rise of bilirubin indicates necessity based on threshold graphs. This will require admission to an intensive care bed.
IV immunoglobulin - used as adjunct to intensified phototherapy in rhesus haemolytic disease or ABO haemolytic disease.
What percentage or prem and term neonates develop jaundice
60% of term neonates develop jaundice and 80% of preterm neonates develop jaundice
What gestation is classed as premature
<37 weeks
How are extreme, very and moderate to late preterm classified
Extreme preterm: before 28 weeks
Very preterm: 28 to 32 weeks
Moderate to late preterm: 32 to 37 weeks
What are the risk factors for prematurity
Previous preterm delivery
Multiple pregnancy
Smoking and illicit drug use in pregnancy
Being under or overweight in pregnancy
Early Pregnancy (within 6 months of previous pregnancy)
Problems involving cervix, uterus or placenta, including infection
Certain chronic conditions such as diabetes and hypertension
Physical injury/trauma
What baseline blood tests need to be done in a premature baby and why?
FBC - high risk of infection, thrombocytopenia and anaemia
U+E - electrolyte and fluid balance, close monitoring of renal function
CRP - infection
ABG - assess the respiratory and metabolic state
blood culture
blood group, DAT - if need blood transfusion or develop jaundice in the first week of life
What scans might be needed in a premature baby and why?
Cranial USS - prems are at increased risk of neurological insults from haemorrhagic, ischaemic and infective factors. CrUSS is used <32 weeks to assess for any signs of intraventricular haemorrhage or ischaemic periventricular white matter damage. Shows those at risk of neurodevelopmental probelms
CXR - needed if an infant shows signs of respiratory distress (tachypnoea, oxygen dependency, increased work of breathing) or to assess the position of the endotracheal tube.
AXR - used to assess the position of the umbilical venous and umbilical arterial catheters after insertion used for parenterel nutrition and IV. AP and lateral film may be needed to assess for signs of perforation if necrotising enterocolitis suspected.
Why are steroids given antenatally in premature babies
surfactant production
reduces risk of intraventricular haemorrhage and death
What are the guidelines for resuscitation of extreme preterm infants
<23 weeks - resuscitation should not be performed
23 to 23+6 weeks - there may be a decision not to start resuscitation in the best interests of the baby, especially if parents have expressed this wish.
24 to 24+6 weeks - resuscitation should be commenced unless the baby is thought to be severely compromised. Response to initial measures should be considered before the decision is made to commence intensive care.
> =25 weeks - it is appropriate to resuscitate and start intensive care.
What drug can be given antenatally to give neuroprotection in preterm babies?
magnesium sulphate
What causes necrotising enterocolitis
there is impaired blood flow to the bowel.
Mucosal ischaemia allows gut microorganisms to penetrate the bowel wall,
causes severe haemorrhagic colitis. . Management involves stopping feeds, supporting thecirculation and antibiotics. Laparotomy is required if perforationoccurs. Complications include intestinal stricture and short bowelsyndrome
How does necrotising enterocolitis present?
abdominal distension
bile-stained vomiting,
bloody diarrhoea
collapse
How is necrotising colitis managed?
stopping feeds TPN antibiotic therapy fluids to support circulation surgical review laparotomy if perforation
How is respiratory distress syndrome managed in neonates
Exogenous surfactant administration via endotracheal tube
endotracheal intubation and mechanical ventilation,
Bilevel positive airway pressure,
continuous positive airway pressure,
high flow oxygen,
What are the signs of respiratory distress syndrome in the neonate
tachypnoea,
intercostal recession,
expiratory grunting
cyanosis
What is seen on CXR in respiratory distress syndrome in neonates
‘ground-glass’ appearance
indistinct heart border
What are the long term consequences of prematurity
neurodevelopmental Impairment:
- gross motor delay,
- fine motor impairment,
- speech and language delay,
- learning and behavioural difficulties
What are the domains of child development
gross motor fine motor speech and language social vision and hearing
Describe the gross motor development of a typical newborn
flexed when prone
head lag
Describe the gross motor development of a typical 6 week old
Head control developing.
In ventral suspension (when held above couch with examiner’s hand supporting the abdomen) can hold head at level of body briefly.
sits with curved back, needs support.
Describe the gross motor development of a typical three month old
can hold head at 90° in ventral suspension
Describe the gross motor development of a typical 6 month old
no head lag when pulled to sit.
Can sit with support.
When lying face down, can lift up on forearms.
Describe the gross motor development of a typical 9 month old
gets into sitting position alone.
Sits unsupported and can pivot.
Crawls.
pulls to standing and stands holding on.(10m)
Describe the gross motor development of a typical 12 month old
stands and walks with one hand held.
May stand alone briefly.
May walk alone.
Describe the gross motor development of a typical 18 month old
walks well.
Climbs stairs holding rail.
Runs.
Seats self in chair.
Describe the gross motor development of a typical 2 year old
goes up and down stairs alone, two feet per step.
Kicks a ball.
Describe the gross motor development of a typical 3 year old
jumps climbs stairs one foot per step. Able to stand on one foot for a few seconds. kicks ball catches ball with arms outstretched rides tricycle
Describe the gross motor development of a typical four year old
tiptoes
runs up and down stairs
Describe the gross motor development of a typical five year old
hops
heel toe walking
catches ball
bike
Describe typical fine motor development in terms of grasp and manipulation of an object
6m - palmar grasp, reaches for object
9m - immature pincer, transfers object between hands
12m - mature pincer, points to objects
2.5y - tripod grip for pencil
Describe typical fine motor development in terms of play with bricks
12m - gives you a brick 15m - builds 2 brick tower 18m - 3 brick tower 2y - 6 brick tower 3y - bridge 4y - steps
Describe typical fine motor development in terms of drawing
18m - scribble 2y - horizontal/vertical line 3y - circle 4y - cross, square 5y - triangle
Describe the typical stages of speech and language development
3m - babbles
8m - two syllable babble
12m - two or three words with meaning
18m - 10-20 words
2y - two words linked, 50 words
3y - 300 words, including names. Three- to five-word sentences, use of pronouns, starts to use plurals and past tense, begins to talk incessantly. Can identify some body parts or objects in a picture.
4y - three to six words per sentence; asks and answers questions, relates experiences, tells stories; almost all speech understood by strangers. Errors with tense are normal - eg, ‘runned’ instead of ‘ran’.
5y - six to eight words per sentence; names four colours; counts to ten.
Describe the typical stages of social development
6w - social smile 4m - laugh 6m - fear of strangers 12m- separation anxiety 15m - drinks from cup with 2 hands 18m - uses spoon 2.5y - toilet trained by day 3y - dresses self
At what age can a child fix their eyes on a face
6 weeks
At what age can a child smile in response
6 weeks
At what age can a child sit unsupported
At what age should they definitely be able to do this by?
6-7months
12m
At what age can a child say a sentence of 2 or 3 words
2y
At what age can a child feed themselves with a spoon
18m
At what age can a child get themselves into a sitting position
9m
At what age can a child walk unsupported
At what age should they definitely be able to do this by?
12m
18m
At what age can a child build a tower of 2-3 cubes
18m
What are some red flags in child development
Abnormal muscle tone (floppy or increased) Not holding object in hand by 5 months Poor head control or floppiness at 6 months. Not sitting unsupported by 9 months Not weight bearing through legs at 12m Not walking independently by 18 months Asymmetry of skills/early hand dominance No speech by 18 months Not pointing to objects/toys to share interest by 2 years Not running at 2 years. Not climbing stairs at 3 years. Persistent toe walking Any loss of skills/regression Any new onset of fits/possible seizures Increased muscle tone
What is bronchiolitis
lower airway epithelial lining inflammation due to viral infection
causes infected cells to slough off leading to airway obstruction, hypoxia and breathlessness
What causes bronchiolitis
RSV - respiratory syncytial virus (most common) hMPV - human metapneumovirus adenovirus rhinovirus influenza parainfuenza
At what age is bronchiolitis most common
under 2 years
3-6m
What are the risk factors for developing bronchiolitis
older siblings
going to nursery
parental smoking
overcrowding