Aquifer - Newborn and Well-Child Visits Flashcards
What is fetal alcohol syndrome?
A distinct pattern of facial abnormalities, growth deficiency, and evidence of CNS dysfunction; victims may exhibit cognitive disability and learning problems, as well as neurobehavioral deficits such as poor motor skills and impaired hand-eye coordiation
Effect of maternal tobacco use on the baby?
Increased risk of low birth weight
NO characteristic facial abnormalities
Effect of maternal alcohol use on the baby?
Facial abnormalities
Growth deficiency
CNS dysfunction
Effect of maternal marijuana use on the baby?
Currently unknown
Effect of maternal heroin/opioid use on the baby?
Fetal growth restriction Placental abruption Fetal death Preterm labor Intrauterine passage of meconium Neonatal absence syndrome
Effect of maternal cocaine/stimulant use on the baby?
Vasoconstriction
Placental insufficiency
Low birth weight
Possible cognitive deficits later in life
Maternal use of what substances can cause low birth weight?
Tobacco
Cocaine/stimulants
Symptoms of neonatal abstinence syndrome?
Uncoordinated sucking reflexes leading to poor feeding, irritability, high-pitched cry
When is SGA/LGA diagnosed?
At birth
When is IUGR diagnosed?
During pregnancy
Define IUGR
Fetus that has not reached its growth potential at a given gestational age due to 1+ causative factors
What is symmetric IUGR and what can cause it?
Head, length, and weight are decreased proportionately
Congenital infections may adversely affect brain growth and often result in symmetric IUGR
What is asymmetric IUGR and what can cause it?
Greater decrease in the size of the length and/or weight without affecting head circumference
Poor delivery of nutrition to the fetus
Maternal factors that can lead to SGA?
Young and advanced age Prepregnancy short stature/thinness Poor weight gain in 3T Nulliparity Abnormal prenatal care Lower SES African-American Polyhydramnios Substance use
Fetal factors that can lead to SGA?
Chromosomal abnormalities and syndromes
Metabolic disorders
Congenital infections
Structural abnormalities
Medications and other exposures that can lead to SGA?
Antimetabolites Bromides Hydantoin Isotretinoin Metal (mercury, lead) PCBs Propranolol Steroids Toluene Trimethadione Warfarin Substance use: amphetamines, cigarette smoking, cocaine, ethanol, heroin/narcotics, PCP
Uterine and placental abnormalities that can lead to SGA?
Avascular villi Decidual or spiral artery arteritis Infectious villitis Multiple gestation (limited surface area, vascular anastamoses) Multiple infarctions Partial molar pregnancy Placenta previa/abruption Single umbilical artery Umbilical thrombosis Abnormal umbilical vascular insertions Syncytial knots Tumors including chorioangiom and hemangioma
3 major risks for SGA newborns?
- Hypoglycemia
- Hypothermia
- Polycythemia
Causes of hypoglycemia in SGA newborns?
Decreased glycogen stores, heat loss, possible hypoxia, decreased gluconeogenesis
Presentation of hypoglycemia and hypothermia in SGA newborns?
Commonly asymptomatic, though may exhibit poor feeding/listlessness
Causes of hypothermia in SGA newborns?
Cold stress, hypoxia, hypoglycemia, increased surface area, decreased subcutaneous insulation
Causes of polycythemia in SGA newborns?
Chronic hypoxia, maternal-fetal transfusion
Presentation of polycythemia in SGA newborns?
Ruddy or red color to skin, respiratory distress (hyperviscosity syndrome -> inadequate oxygenation), poor feeding, hypoglycemia
Define LGA and SGA.
LGA: newborns with birth weight >90th percentile
SGA: newborn with birth weight <10th percentile (varying)
Etiologies of LGA?
Many are constitutionally large
Most important pathologic etiology - maternal DM (hypoglycemia is common)
List the prenatal lab screening tests.
- Maternal blood type, Rh and Ab screen
- Rubella IgG
- HBSAg
- HIV antibody
- RPR or VDRL
- UA
- Urine NAAT for chlamydia and gonorrhea
- Urine or vaginal culture for GBS
- Hepatitis C antibody (in women with a history of IV drug use)
- TB skin or blood test (in women with HIV or who live in a household with someone with active TB)
Special precautions in newborn resuscitation?
Universal precautions
Warm/dry the infant, remove any wet linens (large surface area relative to body weight, can experience significant hypothermia from evaporation)
Stimulate the infant to elicit a vigorous cry
Suction amniotic fluid from nose and mouth
Initiate further resuscitation if required (blow-by oxygen, PPV with oxygen, chest compression, medications)
APGAR components?
Appearance (skin color) Pulse (HR) Grimace (reflex irritability) Activity (muscle tone) Respiration
What APGAR score should prompt continued resuscitation?
<7 at 5 minutes
What can the Apgar score do and not do?
Assess the condition of the newborn immediately after birth
Does not identify birth asphyxia
Does not predict individual neurologic outcome or mortality
What is the Ballard Gestational Age Assessment Tool used for?
Uses signs of physical and neuromuscular maturity to estimate gestational age; helpful if there is no early prenatal U/S to confirm dates or i the age is in question because of uncertain maternal dates
Purpose of demonstration of primitive reflexes?
Evaluate integrity of CNS, detect developmental delay, and assess normal development (abnormalities include asymmetry, absence of appearance, delayed disappearance)
Primitive reflexes present at birth?
Moro, palmar, plantar grasps
Asymmetric tonic neck reflex
Babinski resopnse
Babinski response is normal until what age?
2 years
Normal Moro reflex?
Symmetric abduction and extension of the arms followed by adduction of the arms
When does the Moro reflex disappear?
By 4 months
When does the palmar and plantar grasp reflex disappear? It must disappear before the infant can do what?
2-3 months; grasp objects voluntarily, begin taking steps
Normal asymmetrical tonic neck reflex?
Turning the newborn’s head to one side causes gradual extension of the arm toward the direction of the infant’s gaze with contralateral arm flexion
The asymmetrical tonic neck reflex must disappear before what?
The infant can reach for objects in or across the midline