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471744
Newborn screening
Descripción
(Endocrine & metabolic) Paediatrics Mapa Mental sobre Newborn screening, creado por v.djabatey el 09/01/2014.
Sin etiquetas
endocrine & metabolic
paediatrics
paediatrics
endocrine & metabolic
Mapa Mental por
v.djabatey
, actualizado hace más de 1 año
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Creado por
v.djabatey
hace más de 10 años
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Resumen del Recurso
Newborn screening
heel prick test- spot of blood onto filter paper
phenylketonuria
UK incidence= 1 in 10,000-15,000 births
pathology
deficiency of phenylalanine hydroxylase
classical PKU
defect in synthesis or recycling of biopterin cofactor of phenylalanine hydroxylase
presentation
developmental delay @ 6-10 months of age
untreated PKU
musty odour
due to phenylactic acid (a metabolite)
fair-haired, blue-eyed kids
eczema
seizures
Mx
Rx: dietary restriction of phenylalanine
but enough for optimal physical and neuro growth
maintain throughout life
imp during pregnancy
high maternal fetal phenylalanine damages fetus
regularly monitor blood phenylalanine
cofactor defects
poorer prognosis
Rx: diet low in phenylanine and neurotransmitter precursors
hypothyroidism
cystic fibrosis
haemoglobinopathies
MCADD
homocystinuria
pathology
cystathionine synthetase deficiency
presentation
developmental delay
evenutally subluxation of lens (ectopia lentis)
progressive learning difficulty
psychiatric disorders
convulsions
Marfan's syn like skeletal manifestations
fair complexion and brittle hair
thromboembolic episodes @ any age
Rx
large doses of coenzyme pyridoxine
if poor response to pyridoxine
low methionine diet w/ cysteine supplementn
+ betaine (re-methylating agent)
tyrosinaemia
rare
autosomal recessive
pathology
fumarylacetoacetase def
toxic metabolites build up
-> liver damage
-> liver failure
-> renal tubules
Falconi syndrome
fatal if untreated
Rx
NTBC
inhibits enzyme vital to tyrosine catabolism
low tyrosine and phenylalanine in diet
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