Fetus and Newborn Infant

♦Normal Newborn Infants
     o Delivery room management
            Know that a newborn infant ...
∗   Atrial tachys: a. flutter, a. fib, SVT
                      ∗   Persistent tachycardia can cause myopathy that might ...
infants than for full term infants
   Recognize that preterm infants have a greater daily fluid requirement per kg of bod...
•   OAE (evoked otoacoustic emissions)
               ∗ Measures tiny sounds generated in the cochlea that can be measured...
•As a rule for preterm infants, know that their MAP should not be less than their
                      corrected GA in we...
 Know the management of any neonatal abstinence syndrome
             • Early discharge is not an option for any baby wit...
• Minimize interruptions and allow full chest recoil between compressions
       Recognize the metabolic consequences of ...
•  The degree of immaturity is the principal determinant for prognosticating the
                 outcome of VLBW infants;...
•    Requires stabilization of the airway, control of respiratory function, support of
            circulation (PRBC trans...
pneumonia and pneumothorax
                ∗ Usually presents within a few hours after birth with tachypnea,
•    As above, including the differences in oxygenation of upper and lower extremities
       •    Also have CXR findings ...
   Know the tx of abd distention caused by congenital bowel obstruction
   Recognize the si and sx of esophageal atresia...
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Fetus and newborn infant


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Fetus and newborn infant

  1. 1. Fetus and Newborn Infant ♦Normal Newborn Infants o Delivery room management  Know that a newborn infant who is cold stressed rapidly depletes essential stores of fat and glycogen  Know that heat loss in the delivery room can be reduced by use of radiant warmer, drying and swaddling  Recognize the hazards and benefits associated with the use of radiant warmers for neonates • Benefits: decrease heat loss • Hazards: increase water loss  Know that a normal newborn infant can fixate  Know the components of the Apgar score • Activity • Pulse • Grimace (reflex irritability) • Appearance (skin color) • Respiration  Know the significance of the one and five minute Apgar scores • One minute Apgar score indicates the infant’s intrauterine environment and tolerance of the delivery process • Five minute Apgar score reflects the success of the infant’s transition • Infants with a 5-minute score of 7 or less are at risk for suboptimal transition and may require closer observation • Infants with a 5-minute of 3 or less need very careful monitoring and observation, likely the NICU • Ability of an infant to maintain temp, HR, RR generally indicate a successful transition o Fetal Assessment  Know that the nonstress test monitors fetal heart rate reactivity in response to fetal activity • This tests the fetal autonomic nervous system integrity • The nonstress test is the initial eval done to look for fetal HR, short and long term fetal HR variability, and reactivity to any fetal movement  Recognize that the stress test is used to evaluate uteroplacental insufficiency • Measures fetal HR response to uterine contractions, and is therefore able to assess uteroplacental sufficiency and tolerance of labor  Understand the significance and plan the management of dysrhythmias • Arrhythmias are detected in about 1% of all fetuses and may be quite benign; when they are sustained they are categorized as brady or tachycardic as follows • BRADYCARDIC: ∗ Complete heart block  One etiology of these is due to exposure to maternal antibodies (SS-B/La antigens) and seen most commonly in maternal autoimmune disorders like SLE • TACHYCARDIC:
  2. 2. ∗ Atrial tachys: a. flutter, a. fib, SVT ∗ Persistent tachycardia can cause myopathy that might lead to heart failure and to nonimmune hydrops ∗ When tx is required for control it can often be administered to the mother and then it is transferred across the placenta and txe the fetus ∗ Preferred over preterm delivery or umbilical artery catheterization o Maternal screening o Transition  Recognize the need to plot anthropomorphic measurements against the gestational age on a graph • Helps to assess whether the baby is outside the 95% range (either small or large), and this can help guide further workup/management/treatment  Know the physical and behavioral characteristics of the preterm infant • Physical: thin, moist, transparent skin, flattened thin ears without cartilage or recoil, small phallus and empty scrotum (if male) • Behavioral: low muscle tone, relative inactivity, absence of flexed posture, random, purposeless flailing of extremities in response to tactile stimulation  Distinguish between small for gestational age and preterm gestation in low birth weight infants • SGA means that they are underweight for their gestational age; ∗ Term SGA infants have a greater risk for neurodevelopmental disability in preschool years and beyond than compared with term appropriately grown infant peers; risk is predicted by serial neurodevelopmental testing, and is better predictive in the preschool age than earlier (i.e. better predictive based on outcomes from age 3-5) • Preterm infants can be AGA but LBW – meaning that if their weight is adjusted for their GA it will be appropriate, but their actual birth weight is still considered low • LBW = any baby born weighing <2500g • SGA = any baby who is below the 10th percentile for their GA  Know the physical and behavioral characteristics of a full term infant • Physical: pink and chubby • Behavioral: alert, able to fixate visually, normal muscle tone and reflexes  Know the physical and behavioral characteristics of a post-term infant • Physical: decreased subQ tissue, dry and peeling skin, wrinkled skin and sparse hair o Routine care  Plan appropriate evaluation of an infant with physiologic breast hypertrophy • Not necessary  Recognize that maternal exposure to drugs that may affect coagulation and can result in early hemorrhagic disease of the newborn • Drugs that affect it are certain anticonvulsants, antibiotics and anticoagulants taken during pregnancy • Usually due to causing a vit K deficiency in the baby • Can manifest as cephalohematoma, often accompanied by bleeding at unusual sites • All babies should get Vit K at birth  Recognize the caloric requirement per kg for adequate growth is greater for preterm
  3. 3. infants than for full term infants  Recognize that preterm infants have a greater daily fluid requirement per kg of body weight than term infants  Recognize that insensible water loss is increased by prematurity and use of radiant warmers  Recognize that the rapid assessment of whole blood glucose concentrations may yield falsely high or low values • Can be due to methodologic errors/incorrect technique, etc  Know the normal range of the hct for newborn infants • Term newborn has Hct of about 61%; hgb is about 19.3  Recognize that preterm infants have lower hct than term infants • Begin with lower baseline hct and hgb and also lower Fe stores  Distinguish between the timing of physiologic anemia of the term and preterm infant • Term infants have their nadir at about 8-12 weeks of age • Preterm infants have their nadir between 3-8 weeks of age  Recognize the presenting signs and sx of congenital syphilis • Congenital syphilis is contracted by transplacental transmission of the spirochetes and can occur at any stage of pregnancy, more commonly when the mother has a primary or secondary infection rather than latent infection • Early congenital syphilis: ∗ Liver manifestations: HSM, jaundice, elevated LFTs, bile stasis ∗ Hematologic: LAD, Coombs negative hemolytic anemia, TCP due to platelet consumption in the spleen ∗ Mucous membrane involvement: mucous patches, rhinitis (“snuffles”), condylomatous lesions ∗ Musculoskeletal disease: osteochondritis, pseudoparalysis of Parrot (won’t move a limb due to pain), periostitis ∗ CNS abnormalities, FTT, choreoretinitis, pancreatitis and renal disease are also possible ∗ Per a question critique, important to know that early physical signs of congenital syphilis are hydrops fetalis, IUGR, HSM, hemolytic anemia, jaundice, maculopapular rash, and radiographic findings of lines of arrested growth, metaphyseal destruction, periosteal changes (periostitis) • Late manifestations of congenital syphilis: prominence of forehead (“Olympian brow”), anterior tibial bowing (“saber shins”), scaphoid scapulae, Hutchinson teeth (peg shaped upper incisors), mulberry molars, saddle nose (due to the rhinitis), rhagades (linear scars from prior mucocutaneous fissures), neurologic abnormalities, interstitial keratitis, eight nerve deafness, Clutton joint (painless arthritis of the knee)  Know the utility and limitations of PKU testing • Is able to screen for elevated phenylalanine levels but does not distinguish between those babies who just don’t yet have matured metabolizing enzymes and those with true PKU • Will need to have a repeat screening test or blood to be sent for amino acid quantification; amino acid analysis allows a geneticist to determine of it is true PKU, hyperphenylalaninemia, and newborn immaturity • Note: in the child with true PKU, tyrosine becomes and essential amino acid  Understand the use of OAE devices for neonatal hearing screening
  4. 4. • OAE (evoked otoacoustic emissions) ∗ Measures tiny sounds generated in the cochlea that can be measured in the external auditory canal after acoustic stimulation ∗ Two kinds: transient evoked OAE and distortion product OAE ∗ Requires a quiet environment and a still, quiet infant for best results  Know the recommended methods of umbilical cord care • Goal of care = maintaining hygiene, avoiding infection, promoting cord separation • ”Dry cord care” is okay in developed countries and it just calls for drying the stump after the baby is bathed with water and gentle soap • There is a trend toward reduced infections with application to triple antibiotic ointment; use of alcohol may delay cord separation but can allay familial concerns • Lots of folk remedies – if they aren’t doing harm, don’t worry about it  Recognize that delayed or absent passage of meconium is associated with colonic obstruction (e.g. meconium plug syndrome, Hirschsprung, imperf anus) • Meconium plug syndrome ∗ Typically an isolated phenomenon, not associated with anatomic obstruction ∗ May be associated with maternal mag sulfate tx for preeclampsia/eclampsia ∗ Plain radiographs show nonspecific findings ∗ Contrast enema will illuminate the plugs AND facilitates their elimination ∗ Colonic motility is usually normal after evacuation of the plug • Hirschsprung disease: congenital absence of ganglion cells ∗ 95% of those affected fail to pass meconium in the first 24 hours ∗ a contrast enema may show a transition zone in the rectosigmoid colon ∗ if being considered then a diagnostic rectal bx should be performed • Imperforate anus occurs in about 1 in 4000-5000 births and may be seen in conjunction with other anomalies (VACTERL syndrome) • Plan of care for delayed stooling should be a repeat exam of the abd and rectum, assessing for adequacy of feeding, if no stool for 48 hours then a barium enema, surgical consult for rectal bx, observing for signs of intestinal obstruction, hydration and feeding until a dx is established  Know the difference between bottle fed infants and breast fed infants as related to stool frequency and frequency of feeding •  Know that a newborn infants who does not void by 24h of age warrants eval  Plan the eval of an anuric infant • Repeat exam of the abd and genitalia • Assess for adequacy if feeding • Cath baby to see if urine present • Obtain UA • Check BUN and Cre • Order renal US • If starts to void spontaneously and is observed to have no further problem than no more w/u is required • If continues not to void a urology referral may be needed  Know that blood pressure varies directly with gestational age
  5. 5. •As a rule for preterm infants, know that their MAP should not be less than their corrected GA in weeks  Recognize the bilious vomiting is a common finding in infants with SBO • Bilious vomiting in a neonate is unusual and it should be considered a medical emergency • About 20% of neonates with bilious vomiting have a condition that requires surgical intervention; most life threatening condition is midgut rotation with volvulus • Other conditions include duodenal atresia, annular pancreas, jejunal atresia, ileal atresia, colonic atresia, meconium ileus, Hirschprung dz  Understand bilirubin synthesis, transport and metabolism • Produced from the catabolism of heme in the reticuloendothelial systemunconjugated bilirubin enters the circulation reversibly but tightly bound to albuminB-A complex enters the liver and the hepatocytes and is enzymatically combined with glucuronic acid; the conjugation reaction is catalyzed by UGTthe mono and diglucuronides are excreted into the bile and gutin newborns much of the conjugated bili in the gut gets hydrolyzed back to unconjugated biliunconjugated bili is reabsorbed into the bloodstream vie the enterohepatic circulationadds to the bili load already in the live • The enterohepatic circulation is an important part of neonatal jaundice; in adults the bacteria on the colon rapidly reduce the conjugated bilirubin and little enterohepatic circulation occurs  Distinguish between physiologic jaundice in a full term infant and physiologic jaundice in a preterm infant • Preterm infants are at a much higher risk of complications due to jaundice and there is a lower threshold for starting tx of the hyperbilirubinemia o Discharge plans  Know the qualifications for consideration of early discharge on a newborn infant • Most infants are ready for discharge 48 hours after vaginal delivery and 72-96 hours after cesarean delivery • Infant is medically ready for discharge when vitals have been stable for 12 hours, appears healthy and has normal results on physical exam, has stooled and voided, is feeding well, has completed all screening tests, has appropriate follow up planned. Additionally, need to have completed parent education and competency must be demonstrated • Early discharge is discharge prior to 48 hours ∗ Should only occur after vaginal delivery ∗ When antepartum, delivery and postpartum courses are uncomplicated for both mother and baby ∗ When baby is term and AGA ∗ When baby has been evaluated for jaundice  Know the benefits and complications of early discharge of a newborn infant • Benefits: can improve bonding and attachment while minimizing iatrogenic risks • Complications: delayed detection of treatable medical conditions, hyperbili, poor feeding, early termination of breastfeeding, hospital readmission o Home births ♦Abnormal newborn infants o General
  6. 6.  Know the management of any neonatal abstinence syndrome • Early discharge is not an option for any baby with prenatal drug exposure • Cocaine and amphetamines don’t have a true NAs associated with them, but the effects of the drug exposure can be damaging nonetheless, especially CNS/neurotransmitter problems • Alcohol and barbiturates have similar NAS sx of hyperactivity, irritability, crying, hyperphagia but poorly controlled sucking and oral feeding, altered sleep wake periods, tremors, diaphoresis, seizures ∗ Tx = controlled, thermoneutral environment, minimal stimulation, and using phenobarb for pharmacologic management. Phenobarb dose is titrated to effect ∗ The phenobarb is then tapered over 4-6 weeks • Opioid NAS includes hyperirritability, tremors, jitteriness, hypertonia, GI distress (loose stools, emesis, feeding probs), and autonomic sx like yawning, lip smacking, persistent sucking, mottling, fever. May have seizures ∗ Tx = methadone or oral morphine ∗ Note that sx may not be evident for up to 5 days, and can be longer if the exposure was to methadone  Formulate a ddx of lethargy and coma in a neonate • Can be associated with sepsis and asphyxia, inborn error of metabolism o Resuscitation  Know that a normal newborn infant has established regular respirations by 1 minute of age  Recognize that an infant who has a slow heart rate and impaired ventilatory effort requires immediate PPV  Recognize the need to establish airway before applying PPV  Know that initial lung inflation may require increased pressure for the first breath  Recognize that, in addition to nasopharyngeal suctioning, a newborn infant’s larynx needs to be visualized and the trachea suctioned if thick or particulate meconium is present in the amniotic fluid and the infant is not vigorous • Suctioning does not need to be done in a vigorous infant; but if the infant is not vigorous then tracheal suctioning needs to be done before additional resuscitative efforts. If mec is recovered then sxning should be repeated until little additional mec is aspirated or the HR is no longer stable  Recognize that if mec is present in the amniotic fluid the mouth and hypopharynx of the infant need to be suctioned • Only need to do deep sxning as above  Recognize when during resuscitation external cardiac massage needs to be initiated in a newborn infant (e.g. if the HR does not increase above 60 BPM after effective ventilation with oxygen has been established)  Know the proper technique for external cardiac massage of a newborn • Compressions should be directed above the xyphoid process and the chest depressed to 1/3 the A-P diameter • Recommended ratio of three compressions to one ventilation at a rate of 100 compressions / minute • The rescucitator should encircle the baby’s entire chest with the hands and depress the chest with the thumbs, compressing the entire thorax circumferentially
  7. 7. • Minimize interruptions and allow full chest recoil between compressions Recognize the metabolic consequences of continued poor perfusion in a newborn infant • Low cardiac output results in endothelial cell damage with resultant activation of the coagulation cascade into a procoagulant state • Subsequent microthrombosis and tissue ischemia result in free radical release, excessive neurotransmitter release, mitochondrial damage, neutrophil activation, nitric oxide induced cell apoptosis, activation of additional inflammatory cascades and cell necrosis all contributing to diffuse tissue damage o VLBW infant  Recognize that VLBW infants often cannot achieve and Apgar score greater than 6 because they are neurologically immature • Have diminished tone and reflexes, the HR, RR and color are also interrelated and affected by the infant’s clinical status  Recognize that initial care of a VLBW infant includes administration of a parenteral glucose soln • Have low endogenous fat and glycogen stores and limited capacity for gluconeogenesis and so they need continuous infusion of glucose to prevent hypoglycemia • Initially need to 4-6mg/kg/min of dextrose soln (D10); then eventually need higher rates  Recognize the initial care of a VLBW infant includes maintenance of a thermoneutral environment • Immature skin with minimal keratininzation as well as immature kidneys led to increased water losses, so a humidified incubator is best  Recognize the initial care of a VLBW infant includes monitoring of blood glucose and arterial oxygen concentrations • Goal PaO2 is 50-70 (SaO2 of 85-95%) • Blood glucose concentrations need to be greater than 50n the first 24 hours after birth, and greater than 50-60 thereafter  Recognize the initial care of a VLBW infant includes evaluation for sepsis if appropriate • Unless there is clear noninfectious cause for the preterm delivery can be identified then workup for sepsis and prophylactic treatment needs to be undertaken • Initial lab eval should include a CBC, blood culture and CRP • Initial abx should be ampicillin and gentamicin • Usual suspects for infection are GBS, listeria and gram negatives like e. coli; (if mom was txed with abx there is a greater chance of a gram negative infection)  Understand the prognostic factors for VLBW infants • Highest risk for neurodevelopmental problems in those who are ∗ Male ∗ GA under 28 weeks ∗ BPD ∗ CP ∗ Cerebral white matter injury ∗ Late onset sepsis or NC and need for surgery • Other risk factors are persistent poor weight gain or head growth after 36 weeks postmenstrual age
  8. 8. • The degree of immaturity is the principal determinant for prognosticating the outcome of VLBW infants; the degree of illness experienced in the NICU also contributes to survival prognostication and acute and long term morbidity o Conditions, diseases  Know that HIE is the most common cause of seizure in a full term infant • Accounts for about 67% of early neonatal seizures • Other causes: intracranial hemorrhage, CVA or hemorrhagic infarct; intracranial malformation; transient hypoglycemia or hypocalcemia; drug withdrawal; inborn errors of metabolism  Recognize that neonatal seizures secondary to HIE characteristically occur within 24 hours after birth • If the seizure onset is beyond the first 24 hours need to broaden the differential and also consider infection (meningitis, encephalitis)  Recognize the majority of full term newborn infants who have neonatal seizures secondary to asphyxia do not manifest long term neurodevelopmental sequelae • Motor abnormalities may be found on exam in a slight majority (53%) of newborns having an sz for any cause, few have CP • Severe impairment in neurodevelopmental outcomes occurs in fewer than 50% of newborns who had sz due to asphyxia; Mild to moderate neurodevelopmental impairment in cognitive and motor function is about 33% • Early predictors of outcome for such children may be determined by evaluating the worst EEG finding, the follow up 1-week EEG, and findings on cranial MRI  Recognize that intrapartum asphyxiation can cause injury to multiple organ systems • CV: systemic hypotension, pulm htn, dilated cardiomyopathy, myocardial ischemia • Pulm: respiratory distress, surfactant depletion/disruption with capillary-alveolar leak, hypoxic respiratory failure with pulm htn, apnea • Renal: oliguria, ATN, renal failure • GI: impaired gastric motility, GI hemorrhage, NEC (even in term infants), ischemic hepatitis, hepatopathy • Hematopoietic: anemia, TCP, coagulopathy • Metabolic: academia, hypoglycemia, hypocalcemia, hypomagnesemia • CNS: HIE, apnea, irritability, jitterniess, abnormaities in neuromuscular tone, seizure, coma  Recognize that newborn infants with polycythemia are at risk for hypoglycemia and hyperbilirubinemia, and manage appropriately • When a baby is discovered to have polycythemia they need to be screened for hypoglycemia and hyperbilirubinemia • If the hypoglycemia does not improve with IV glucose then need to consider exchange transfusion with IV NS (reduces the RBC mass and helps with circulatory flow in the microcirculation)  Know that the treatment for symptomatic polycythemia is partial exchange transfusion  Plan the management of a patient with hyperbilirubinemia •  Understand the strategies for prevention of severe hyperbilirubinemia in newborn infants (e.g. increased breastfeeding, screening prior to discharge) •  Plan the evaluation and management of a neonate with intracranial hemorrhage
  9. 9. • Requires stabilization of the airway, control of respiratory function, support of circulation (PRBC transfusion), correction of acidosis and hyperglycemia; can start anticonvulsant tx of they have seizures (phenobarbital); bedside cranial U/S is best imaging; also need to investigate for underlying causes like a coagulopathy or sepsis • Avoid hyercarbia, hyopxia and hypotension  Recognize the clinical and lab findings associated with intracranial hemorrhage in a neonate • Acidosis (metabolic, due to tissue damage and hypovolemic shock), hyperglycemia (due to acute stress), anemia (acute decrease in HCT into the brain), TCP (consumptive), hyponatremia (SIADH)  Recognize the SGA infants have a higher neonatal mortality rate than AGA infants  Recognize that SGA infants are prone to fasting hypoglycemia, polycythemia, and temperature instability, and manage appropriately • Need glucose infusions, might need NG/OG feeding tubes due to likely feeding probs • Keep them in thermoneutral environment  Know that perinatal asphyxia is a frequent complication of IUGR • Poor tolerance of labor and asphyxia are more common  Know the normal arterial blood gas values for a newborn infant (pO2 60 to 90mmHg, pCO2 35 to 45 mmHG) •  Understand the effects of surfactant administration in and infant with RDS • Clinically will have less work of breathing, improved oxygenation and ventilation, reduction in assisted ventilation (decreased FiO2), decreased mean airway pressure (reduction in needed inspiratory pressure), improved pulmonary compliance (improved changes in lung volume per unit of inspiratory pressure) • On x-rays the degree of lung aeration improves as the microatelectasis is overcome, lung volumes also improve • On lab the academia improves  Recognize that pulmonary air leaks are common in newborn infants who are treated with assisted ventilation • Grunting respirations are a clinical sign  Recognize that neonatal pneumonia can mimic RDS • RDS is due to surfactant deficiency and characteristically affects newborns born under 32 weeks GA • In term and late preterm infants who have respiratory dustress, need to look for other causes, including infection, aspiration, cardiac disease, congenital anomalies • Congenital pneumonia can cause resp distress and would be seen in babies of moms with chorio, prolonged rupture of membranes, GBS carriers • Would see tachypnea, tachycardia, need for supplemental O2, temp instability, poor feeding • Radiographically will resemble RDS with air bronchograms, diffusely hazy lung fields, low lung volumes  Identify and manage transient tachypnea of the newborn • Dx is based on clinical and radiographic findings ∗ Frequently a dx of exclusion and need to r/o other conditions like RDS,
  10. 10. pneumonia and pneumothorax ∗ Usually presents within a few hours after birth with tachypnea, retractions, grunting and occasionally with need for supplemental O2 ∗ Tachypnea resolves by 72 hours by can last longer ∗ If grunting and other signs of distress persist then may need more workup/intervention ∗ Barrel shaped chest due to hyperinflation and might be able to feel the liver and spleen due to the hyperinflation pushing them down ∗ Crackles may be present ∗ BP usually normal ∗ Radiographic findings: prominent perihilar vascular markings due to engorged periarteriolar lymphatics, edema of the interlobar septae, fluid in the fissures, possibly hyperinflation, fluid in the costophrenic angles, widening of intercostal spaces • Management: “rue of two hours” to determine of it is due to transtion or possibly other respiratory problems. ∗ if no improvement in the degree of distress than get a CXR; if desats on room air an ABG might be helpfulif the CXR is abnormal, baby is worsening clinically, requires >40% O2 to maintain sats, or no improvement after 2 hours of feasible interventions then need to consider transfer to higher level of care ∗ if tachypnea associated with increased WOB then need to keep baby NPO, start IVFs ∗ if the increased WOB persists beyond two hours with the tachypnea then need to worry about other possible etiologies; majority of cases of TTN have resolution of the tachypnea by 48 hours of age ∗ preferably give O2 supplementation by hood ∗ cannot have a definitive dx of TTN until the tachypnea resolves; babies should not be discharged until have a resp rate <60 for more than 12 hours  Know that peripheral cyanosis is a common finding in healthy full term newborn infants  Know that it is difficult to distinguish between persistent pulmonary hypertension without meconium aspiration and cyanotic congenital heart disease • Persistent pulmonary hypertension of the newborn is also referred to as “persistence of fetal circulation” ∗ Called this b/c there remains a persistent right to left shunt via the PDA; usually due to increased pulmonary vascular resistance cause by one of many problems. The pulm vascular resistance may be higher than systemic vascular resistance and so deoxygenated blood from the right ventricle traverses the PDA and enters the aorta rather than traveling vie the pulmonary artery to the lungs • Signs include grunting, tachypnea and respiratory distress and failure; precordial lift due to increased work of the RV; lower O2 sat in the lower body than the upper body • Causes of increased pulmonary vascular resistance include pneumonia, lung collapse, pulmonary hypoplasia  Recognize the clinical presentation of a neonate with persistent pulmonary hypertension following mec aspiration
  11. 11. • As above, including the differences in oxygenation of upper and lower extremities • Also have CXR findings of MAS: hyperinflated lung fields, patchy infitrates, varying degrees of atelectasis and hyperaeration  Know the appropriate abx treatment for suspected sepsis in the immediate newborn period • Ampicillin and gentamicin  Know the significance for infection of prolonged premature rupture of the membranes • Two maternal coditions increase the risk of early onset neonatal sepsis in the face of PROM ∗ Choriomanionitis  Risk for fetal infection that may not be treated fully with maternal abx; hence the baby might have partially treated bacteremia, pna, or meningitis and require treatment for presumed sepsis ∗ GBS colonization  Infants born before 36 weeks gestation are more susceptible to GBS infection especially in the face of PROM or chorioamnionitis; a sepsis eval and empiric abx tx is recommended for the preterm infant following PROM  Understand the risk of sepsis from the use of intravascular catheters • UAC and UVC lines- get colonized with commensal staph within 24 hours of insertion; need to be removed by day 10-14, preferably by day 7  Recognize the perinatal infection with CMV may be acquired in utero, during delivery, or in the neonatal period (e.g. breast milk, blood transfusion) • If a primary CMV infection during pregnancy the risk of transmission from mother to fetus is about 50%; if mother infected before pregnancy then risk of transmission is 0.5-2% • If term infant acquires during delivery or from breastfeeding, there is no apparent disease, but there can be illnesses associated with this kind of transmission for the preterm infant • Can be transmitted via transfusion of whole blood; it resides in the white cell fraction  Recognize the si and sx of symptomatic congenital CMV disease • Blueberry muffin baby, due to extramedullary hematopoiesis • Petechiae, purpura, HSM, jaundice, SGA, microcephaly • They get biliary obstruction due to the extramedullary hematopoiesis, leading to hepatomegaly, hepatitis, and elevated d. bili • Neurologic features occur in about 2/3 of symptomatic newborns; includes seizures, ocular abnormalities (notable chorioretinitis), hypotonia, poor suck  Recognize the clinical manifestations of congenital CMV infection including hearing loss and MR  Recognize that the majority of infants with congenital toxoplasmosis are asymptomatic in the neonatal period  Plan the eval of a full term infant who has severe respiratory failure at birth that does not respond to intubation and assisted ventilation  Know the usual presentation of necrotizing enterocolitis, and plan initial management  Know that radiographic findings of pneumointestinalis is the hallmark of NEC  Recognize that intestinal stricture formation is a late complication of NEC  Recognize the clinical si and sx of congenital bowel obstruction
  12. 12.  Know the tx of abd distention caused by congenital bowel obstruction  Recognize the si and sx of esophageal atresia with tracheoesophageal fistula  Know how to evaluate an infant with TE fistula  Recognize that an infant of a diabetic mother is at risk for hypoglycemia, hypocalcemia, polycythemia, and neonatal small left colon syndrome  Understand the pathogenesis of hypoglycemia in an infant with a diabetic mother  Understand the management of a newborn whose mother has DM1  Understand the effects of drugs given to the mother during labor (e.g. opiates, beta andrenergic tocolytic agents) on the fetus/neonate  Know the association between maternal use of alcohol and any fetal abnormalities and/or neonatal abstinence syndrome  Know the association between maternal use of marijuana and any fetal abnormalities and/or neonatal abstinence syndrome  Know the association between maternal use of tobacco and any fetal abnormalities and/ or neonatal abstinence syndrome  Know the association between maternal use of opiates and any fetal abnormalities and/or neonatal abstinence syndrome  Know the association between maternal use of amphetamines and any fetal abnormalities and/or neonatal abstinence syndrome  Know the association between maternal use of barbiturates and any fetal abnormalities and/or neonatal abstinence syndrome  Know the association between maternal use of cocaine and any fetal abnormalities and/ or neonatal abstinence syndrome