Neonatology/Critical Care Flashcards
When is neonatal mortality the highest?
In 1st 24 hours after birth
Leading cause of infant death in the post-neonatal period?
SIDS
What is nonstress test
FHR and reactivity
Positive = good
What is a stress test?
FHR response to contractions
Positive = late decelerations = bad
What is a biophysical profile
NST Movements Breathing Tone Amniotic fluid index
0 or 2 points each
>8/10 reassuring
Oligohydramnios is associated with…
Renal anomalies
Pulmonary hypoplasia
Limb contractures
Cord compression
Polyhydramnios is associated with…
Intestinal obstruction
Neurologic disorders
Maternal diabetes
When does twin-twin transfusion happen
Monochorionic/diamniotic twins, placental AV anastomoses
Findings in donor twin in twin-twin transfusion
Anemia
Hypovolemia
Oligohydramnios
LBW
Findings in recipient twin in twin-twin transfusion
Polycythemia
Polyhydramnios
CHF
Hydrops
What are complications of hypothermia in the DR?
Metabolic acidosis
Hypoxemia
Hypoglycemia
Renal loss of water & salt
Considerations for LGA infants
May be normal
IDM
Obesity/insulin resistance
Beckwith-Wiedemann
Increased risk of:
- Hypoglycemia
- Birth trauma
Small for Gestational Age
May be normal
Consider chromosomal abnormalities or infection
If IUGR, increased risk for:
- Perinatal asphyxia
- Hypothermia
- Hypoglycemia
- MAS
- Polycythemia
Perinatal period
28wks ega to 7 days of life
Neonatal period
Birth to 28 days
Infant period
Birth through 1 year
Preterm
<37wks
Term
37 -41+6
Postterm
> 42wks ega
LBW
<2500g
VLBW
<1500g
ELBW
<1000g
What maternal medications decrease Vitamin K levels?
Anticonvulsants
Warfarin
AntiTB meds
What is eye ointment given for?
To prevent gonococcal opthalmia – NO EFFECT ON CHLAMYDIAL CONJUNCTIVITIS
1% silver nitrate aqueous solution
0.5% erythromycin ointment
1% tetracycline ophthalmic ointment
Silver nitrate can cause chemical conjunctivitis
Coag findings in vitamin K deficiency
Low PT, normal fibrinogen, normal platelets
Whey:Casein in human milk
80: 20 in colostrum
55: 45 in mature milk (>1 month)
Expected growth in the first2 weeks
20 mg/kg/day
110-120 kcal/kg/day
50% of kcals from fat
How does preterm human milk compare to term milk?
Increased protein " sodium " lactoferrin " lysozyme " LC PUFAs " IgA
BUT, inadequate protein, calcium, phosphorus, vitamin D, iron
Causes of false negative NBS
- Insufficient feeding
- Blood transfusion - galactosemia, hemoglobinopathies
- TPN or ABX
- Dialysis
Causes of false positive NBS
- TPN or ABX
- Hemoglobinopathies
When is the peak hematocrit
2hrs of life
What is a normal hct?
45-55%, need venous sample
Capillary samples artificially high due to sludging
What newborns ar at risk for congenital syphillis if maternal nontreponemal and treponemal serology is positive?
- Treatment is inadequate, unkn or undocumented
- Treatment was <30 days before delivery
- Mother was not treated with PCN
- Maternal nontreponeal titers not decreased 4-fold or more
If maternal treatment is adequate, infant positive nontreponemal test = passively acquired antibody
Vomiting, musty/mousy odor, seizures, hypertonicity, MR
Phenylketonuria
Defect in tyrosine pathway (phenylalanine hydroxylase or cofactor tetrahydrobiopterin) –> accumulation of phenylalanine in CNS
Rx: low phenylalanine diet
Most common cause of genetic hearing loss
Non-syndromic
Hearing testing in first 6mos
ABR
Delayed cord release
> 2 weeks
- urachal abnormalities - US
- LAD
- infection
Causes of delayed stooling
GI obstruction
- no emesis –> lower
- meconium disease - plug or ileus (CF)
- congenital aganglionosis/Hirschsprung disease
- small left colon (IDM, drug abuse)
- MgSO4
- hypothyroidism
What percentage of infants void within 24 hours?
95%
Physiologic jaundice
Increased RBC load
“ enterohepatic circulation
Decreased glucuronyl transferase
Term peak 3-5days, PT later and higher
Concerning rate of bilirubin rise
> 0.5mg/dL/hr
Caput succadeneum
Fluid/bruising under skin
Cephalohematoma
Beneath periosteum - does not cross suture lines
Subgaleal hematoma
Between aponeurosis and periosteum - crosses suture lines
Can lose entire blood volume in area
Inspiratory stridor, worse with agitation, better with prone positioning
Laryngomalasia
Expiratory stridor
Tracheomalasia, usually in preterm babies after long duration of ET tube
Causes of EO Sepsis
GBS, E.coli, Listeria, H.flu, enterococcus
Causes of LO Sepsis
CNS, S aureus, pseudomonas, GBS