PBL5 - A Death In Infancy Flashcards
Two months - vaccines (3)
DTaP/IPV/Hib
Pneumococcal conjugate vaccine (PCV)
Rotavirus
Three months vaccine (3)
DTaP/IPV/Hib
Meningitis C
Rotavirus
Four months old vaccine (2)
DTaP/IPV/Hib
PCV - pneumococcal infection
1 year vaccinations (3)
Hib/ Men C
MMR (measles mumps and rubella)
Pneumococcal infection
2 / 3 years vaccine (1)
Influenza nasal spray
Three years and four months vaccines (2)
DTaP/IPV
MMR
Girls 12 / 13 vaccine (1)
HPV - human papillomavirus types 16 & 18 - cervical cancer
14 years vaccine (2)
Td/IPV - Dipteria, tetanus, polio
Meningitis C
Rotavirus causes how many cases of diarrhoea in under 5s in UK?
140,000
Rotavirus leads to how many hospital stays in under 5s?
1 in 10
Rotavirus vaccine name
Rotarix
Whooping cough complications (2)
Pneumonia and brain damage
Whooping cough vaccine for mothers given between….
28-38 weeks of pregnancy
There are whooping cough outbreaks every …
3-4 years
Does whooping cough vaccine last for life?
NO!!
Whooping cough stages:
Early symptoms - 1-2 weeks, cold symptoms
Second stage - Stage lasts 2+ weeks, cough with ‘whoop’ sound, sharp intakes of breath, vomiting after coughing
Whooping cough bacteria
Bordetella pertussis
Heel prick test occurs at how old?
7 days
DTaP / IPV / Hib
Diphtheria, tetanus, pertussis (whopping cough)
Polio
Haemophilus influenza epidemic type B
Heel prick test screens for six inherited metabolic diseases:
PKU - phenylketonuria MCADD - medium chain acy-coA dehydrogenase deficiency MSUD - maple syrup urine disease IVA - isovaleric acidaemia GA1 - Glutaric aciduria type 1 HCU - homocystinuria
All babies have a hearing screening done using
Otoacoustic emissions - sounds of Cochlear origin (hair cells moving) - recorded with a microphone in the ear canal
…. Is screened to look for MCADD
Octanoylcarnitine (C8)
MCADD - disorder of …… … ….
Clinically presents similar to …
MCADD - disorder of fatty acid oxidation
Clinically presents similar to sudden infant death syndrome
Fatty acids are normally released during fasting and taken up by the mitochondria in the liver & muscle.
They are oxidised to produce ….
Acetyl-CoA
MCAD is a … … Enzyme which catalyses …
mitochondrial matrix
Catalyses the initial oxidation reaction of releasing fatty acids when fasting
MCAD incidence:
1 in 8000 - 1 in 15,000
MCADD presentation
Intermittent hypoglycaemia
Vomiting
Transcient fasting
Intercurrent minor infections
MCAD can lead to …
Usually happens between the ages of …
Coma and death
2 months - 2 years
If fatty acid infiltration found in the liver post mortem, consider …
Disorder of fatty acid oxidation (MCAD)
MCAD genetics:
Autosomal recessive
MCAD gene mutation & chromosome & loci & most common gene mutation:
Medium-chain-acyl-CoA dehydrogenase (ACADM)
Chromosome 1
Locus 1p31
Most common mutation - G985 - guanine swapped for adenine
MCAD investigations: Acutely - U&E - LFT - Urine - Skin biopsy -
MCAD investigations:
Acutely - hypoglycaemia
U&E - altered bicarb, reduced anion gap
LFT - elevated enzymes, low plasma carnitine
Urine - absent ketones, medium chain dicarboxylic aciduria
Skin biopsy - primary carnitine deficiency - reduced carnitine transport in fibroblasts
Treat MCAD:
Avoid fasting 6mths - 1 year - 8 hours 2 yrs old - 10 hours 3yrs + - 12 hours - increase carbs, reduce lipids
Give daily carnitine to treat MCAD as… (2)
Allows conjunction and excretion of toxic bi-products from blocked fatty acid metabolism
Clears accumulating acylcarnitines during exercise
SIDS =
Sudden and unexpected death of an infant with no adequate cause found after post mortem
SIDS commonest between age of:
1 month - 1 year
Causes of infant mortality: (5)
Lethal congenital malformations Infections Rare inherited conditions Accidents Non-accidental injury
SIDS commoner in: (3)
Male premature infants
Parents who smoke
Babies who are artificially fed
Prevent SIDS: (1)
Sleep babies on backs
Is it common for babies to have apnoea during sleep?
Yes up to 10 seconds!
Reasons for neonate apnoea: (1, 4)
Abnormalities in arcuate nucleus of the brainstem
- delayed developmental arousal, cardio-respiratory control or cardiovascular control and thermal regulation
What percentage of SIDS is smothering?
5-10%
CONI scheme
Care of next infant
- nurse who visits and supervises subsequent babies