Final Exam Flashcards
(159 cards)
what is myelodysplasia (spina bifida)
birth defect or neural tube and spinal columns when the spinal verbtrea do not close/fuse
when does myelodysplasia occur
fetal period (first 28 days of first trimester)
types of neural tube defects
anencephaly
porencephaly
iniencephaly
encephalocele
anencephaly
brain deformity where parts of brain are missing
porencephaly
brain develops fluid filled cysts
iniencephaly
extreme retroflexion of head
encephalocele
sack like protrusion of brain and membranes through the skull
4 types of myelodysplasia
occulta
closed neural tube defects
meningocele
myelogeningocele
occulta
mildest and most common form
1+ vertebrae malformed
rarely causes disability or symptoms
closed neural tube defects
spine may have malformations of fat, bone, or membranes covering SC
usually requires surgery in childhood causing LE weakness and trouble with bowel/ bladder control
meningocele
sac of spinal fluid protrudes through spine
may have minor symptoms
myelomeningocele
most severe form
part of SC or nerves exposed in sac through opening in spine
need surgical closure in utero or right after birth
changes in brain structure, LE weakness, bowel/ bladder
lower spinal level= less symptoms
causes of myelodysplasia
genetics
exposure to teratogen (alcohol, drugs)
nutritional deficits
overall unknown etiology
what is the most common permanently disabling birth defect in the US
myelodysplasia
how population groups have highest prevalence of myelodysplasia
hispanic women
celtic region
why is the incidence of myelodysplasia decreasing
better nutrition
better screening
better med care
prevention of mylodysplasia
folic acid
counseling for women with a child or siblings with spina bifida
diagnosis of spina bifida prenatally
maternal alphafetoprotein (AFP) test- blood test
ultrasound- look for lemon sign before 24 weeks
amniocentesis- check AFP levels from amniotic fluid
diagnosis of spina bifida post natally
hairy patch of skin or dimple of baby’s back and use imaging
co-occuring conditions with spina bifida
hydrocephalus
Arnold chiari
ortho conditions
bowel and bladder conditions
obesity
precocious puberty
skin breakdown
overuse injuries
medical interventions for spina bifida
fetal surgery (repair)
neurosurgical treatment for hydrocephalus
shunting (VP, VA, ETV)
redirect CSF flow elsewhere
normalize CSF flow and fix pressures in skull
mobility precaution for hydrocephalus neurosurgical treatment
no prolonged head inversion
neurosurgery of hydrocephalus (ETV)
alternative to shunting by creating stoma at based of 3rd ventricle to allow for CSF drainage
longer lasting and more natural but could have serious complications