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Neonatology DivisionNeonatology DivisionDepartment of Child Health Medical School
U i it f S t UtVisual 1
University of Sumatera Utara
Alarming Signs for RD
CyanosisSevere apnea (coma?)Severe apnea (coma?)StridorG i ff tGasping effortsSevere respiratory retractionsPoor perfusion (shock)
Visual 2
Evaluation of RespiratoryEvaluation of RespiratoryDistress Using Down’s Score
> 80/min60 – 80/min< 60/minRespiratory Rate
210
Severe retractionsMild retractionsNo retractionRetractions
80/min60 80/min 60/minRespiratory Rate
N i tMild d i i G d bil t l i Ai E t
Cyanosis on O2Cyanosis relieved by O2
No cyanosisCyanosis
Audible with earAudible by No gruntingGrunting
No air entryMild decrease in air entry
Good bilateral air entry
Air Entry
Learning Objective 1 Visual 3
stethoscope
Evaluation of RespiratoryEvaluation of Respiratory Distress Using Down’s Score
Score < 4 No respiratory distress
Score 4 -7 Respiratory distress
Score > 7 Impending respiratory failure (Blood gases should be obtained)
Learning Objective 1 Visual 4
Be Prepared
Resuscitation equipment and/or suppliesInvolve others (team approach)Involve others (team approach)Have staff trainedABCABC
Airway BreathingCirculation
Visual 5
Investigations
Chest X-rayArterial blood gasArterial blood gasCBC (anemia, polycythemia, sepsis)Gl h k (h l i )Glucose check (hypoglycemia)Blood culture (sepsis, pneumonia)
Visual 8
Treatment
After stabilization, treat the cause of RDUse CPAPUse CPAPAvoid unnecessary exposure to oxygenA tibi ti til i i l d tAntibiotics until sepsis is ruled out
Visual 9
Common Causes of RDCommon Causes of RD
Transient tachypnea of the newborn (TTN)Hyaline membrane disease (HMD)Hyaline membrane disease (HMD)Meconium aspiration syndrome (MAS)Ai l k dAir leak syndromePneumoniaCongenital heart diseases
Visual 10
Transient Tachypnea of theTransient Tachypnea of theTransient Tachypnea of the Transient Tachypnea of the Neonate (TTN)Neonate (TTN)
Definition
A benign disease of near-term or term neonates who have respiratory distress shortly after p y ydelivery that resolves within 3-5 days.
Learning Objective 3 Visual 11
Pathogenesis of TTNPathogenesis of TTN
How is lung fluid formed?What is the function of lung fluids?What is the function of lung fluids?What happens to lung fluids during labor?D it tt th t f l b ? Does it matter the type of labor?
Visual 12
Transient Tachypnea of theTransient Tachypnea of theTransient Tachypnea of the Transient Tachypnea of the Neonate (TTN) (cont)Neonate (TTN) (cont)
Risk factors
Cesarean section without laborMacrosomiaMale sexProlonged laborgExcessive maternal sedation Low Apgar score (< 7 at 1 minute)
Learning Objective 3 Visual 13
o pga sco e ( at ute)
Transient Tachypnea of theTransient Tachypnea of theTransient Tachypnea of the Transient Tachypnea of the Neonate (TTN) (cont)Neonate (TTN) (cont)Clinical Presentation of TTN The neonate is usually near term or term and The neonate is usually near-term or term, and shortly after delivery has tachypnea (>80 b th / i t ) Th t l h breaths/minute). The neonate may also have grunting, nasal flaring, rib retractions, and cyanosis. The disease usually does not last longer than 72 hours.
Learning Objective 3 Visual 14
Transient Tachypnea of theTransient Tachypnea of theTransient Tachypnea of the Transient Tachypnea of the Neonate (TTN) (cont)Neonate (TTN) (cont)
Chest X-ray: Perihilar streaking, mild cardiomegaly, increased lung volume, fluid in the minor fi d h fl id i th l l fissure, and perhaps fluid in the pleural space are common findings.
Learning Objective 3 Visual 16
Transient Tachypnea of theTransient Tachypnea of theTransient Tachypnea of the Transient Tachypnea of the Neonate (TTN) (cont)Neonate (TTN) (cont)
Management of TTN
Judicious use of oxygenFluid restriction F di t h iFeeding as tachypnea improves
Confirm the diagnosis by excluding other causes of Confirm the diagnosis by excluding other causes of tachypnea e.g. pneumonia, congenital heart disease, hyaline membrane disease, and cerebral hyperventilation.
Learning Objective 3 Visual 17
hyperventilation.
Transient Tachypnea of theTransient Tachypnea of theTransient Tachypnea of the Transient Tachypnea of the Neonate (TTN) (cont)Neonate (TTN) (cont)
Outcome and Prognosis of TTN
The disease is self-limited and there is no risk f f th l of recurrence or further pulmonary
dysfunction. Respiratory symptoms improve as i t l fl id i bili d d thi i intrapulmonary fluid is mobilized, and this is usually associated with diuresis.
Learning Objective 3 Visual 18
Hyaline Membrane DiseaseHyaline Membrane DiseaseHyaline Membrane Disease Hyaline Membrane Disease (Respiratory Distress Syndrome)(Respiratory Distress Syndrome)
DefinitionHyaline membrane disease (HMD) is also called respiratory distress syndrome (RDS). This condition
ll i t t P t usually occurs in a preterm neonate. Premature lungs are surfactant deficient.
Learning Objective 4 Visual 19
Hyaline Membrane Disease Hyaline Membrane Disease yy(Respiratory Distress Syndrome) (Respiratory Distress Syndrome) (cont)(cont)(cont)(cont)Respiratory difficulties exhibited include:
Increasing tachypnea (> 60/min)Chest retractionsChest retractionsCyanosis on room air that persists or progresses over the first 24-48 hours of lifeprogresses over the first 24-48 hours of life.Decreased air entryGrunting
Learning Objective 4 Visual 20
Grunting
Hyaline Membrane DiseaseHyaline Membrane DiseaseHyaline Membrane Disease Hyaline Membrane Disease (Respiratory Distress Syndrome) (Respiratory Distress Syndrome) (cont)(cont)(cont)(cont)
Incidence
HMD occurs in about 25% of neonates born at 32 k t ti Th i id i 32 weeks gestation. The incidence increases with increasing prematurity.
Learning Objective 4 Visual 21
Hyaline Membrane DiseaseHyaline Membrane Disease (Respiratory Distress Syndrome) (cont)(cont)
Risk Factors of HMDIncreased Risk
P t itPrematurityMale sexNeonate of diabetic Neonate of diabetic mother
Learning Objective 4 Visual 22
Hyaline Membrane DiseaseHyaline Membrane Disease (Respiratory Distress Syndrome) (cont)(cont)Risk Factors of HMD
Decreased RiskDecreased RiskChronic intrauterine stress
Prolonged rupture of membranes o o ged uptu e o e b a esMaternal hypertensionNarcotic useIntrauterine Growth Retardation (IUGR) or Small for Intrauterine Growth Retardation (IUGR) or Small for Gestational Age (SGA)
Corticosteroids – Prenatal
Learning Objective 4 Visual 23
Hyaline Membrane DiseaseHyaline Membrane DiseaseHyaline Membrane Disease Hyaline Membrane Disease (Respiratory Distress Syndrome) (Respiratory Distress Syndrome) (cont)(cont)(cont)(cont)
Investigations for HMD (RDS)g ( )Laboratory Studies:
Blood gases: hypoxia hypercarbia acidosisBlood gases: hypoxia, hypercarbia, acidosis.CBC and blood culture are required to rule out infection.Serum glucose levels are usually lowSerum glucose levels are usually low.
Chest X-ray Study:Reveals ground glass appearance with air bronchograms
Learning Objective 4 Visual 24
Reveals ground glass appearance with air bronchograms.
Hyaline Membrane DiseaseHyaline Membrane DiseaseHyaline Membrane Disease Hyaline Membrane Disease (Respiratory Distress Syndrome) (Respiratory Distress Syndrome) (cont)(cont)( )( )
Management of HMD (RDS)G lGeneral
Thermal regulation Parenteral fluid AntibioticsContinuous monitoring
Learning Objective 4 Visual 26
Hyaline Membrane DiseaseHyaline Membrane DiseaseHyaline Membrane Disease Hyaline Membrane Disease (Respiratory Distress Syndrome) (Respiratory Distress Syndrome) (cont)(cont)(cont)(cont)
Continuous positive airway pressure (CPAP) is triedtried.If under CPAP
PH < 7 2PH < 7.2Or PO2 < 40mmHg FiO2 > 60%Or PCO2 > 60mmH⎢Base deficit > -10
Endotracheal intubation and mechanical ventilation.C id f t t thLearning Objective 4 Visual 27
Consider surfactant therapy
Hyaline Membrane DiseaseHyaline Membrane DiseaseHyaline Membrane Disease Hyaline Membrane Disease (Respiratory Distress Syndrome) (Respiratory Distress Syndrome) (cont)(cont)(cont)(cont)
Caution: every 10 days on the ventilator is i t d ith 20% i d i k f associated with 20% increased risk for
cerebral palsy
Learning Objective 4 Visual 28
Hyaline Membrane DiseaseHyaline Membrane DiseaseHyaline Membrane Disease Hyaline Membrane Disease (Respiratory Distress Syndrome) (Respiratory Distress Syndrome) (cont)(cont)(cont)(cont)
Specific TreatmentpSurfactant replacement therapy if tracheal intubation is requiredq
OutcomeRDS accounts for 20% of all neonatal deathsRDS accounts for 20% of all neonatal deathsChronic lung diseases occurs in 29% in VLBW infants
Learning Objective 4 Visual 29
infants
Meconium Aspiration SyndromeMeconium Aspiration SyndromeMeconium Aspiration Syndrome Meconium Aspiration Syndrome (MAS)(MAS)Definition
The respiratory distress secondary to meconium aspiration by the fetus in utero or by the neonate during labor and delivery.
Learning Objective 5 Visual 31
Meconium Aspiration SyndromeMeconium Aspiration SyndromeMeconium Aspiration Syndrome Meconium Aspiration Syndrome (MAS) (cont)(MAS) (cont)Pathogenesis: aspiration of meconium can
cause:
Airway obstruction (ball and valve)Severe inflammationPulmonary hypertensionPlatelet activation
Learning Objective 5 Visual 32
Meconium Aspiration SyndromeMeconium Aspiration Syndrome (MAS) (cont)Risk Factors of MAS
Post-term pregnancyMaternal hypertension
Pre-eclampsiaMaternal diabetes mellitusyp
Abnormal fetal heart rateBiophysical profile ≤ 6
SGAChorioamnionitisBiophysical profile ≤ 6
Learning Objective 5 Visual 33
Meconium Aspiration SyndromeMeconium Aspiration Syndrome (MAS) (cont)Clinical presentation of MAS
Meconium staining of amniotic fluid before birth.Meconium staining of neonate after birth.Respiratory distress leading to increased anteroposterior diameter of the chest.Persistent pulmonary hypertension of the newborn (PPHN).
Learning Objective 5 Visual 34
Meconium Aspiration SyndromeMeconium Aspiration Syndrome (MAS) (cont)
Investigations for MAS
Laboratory studiesBlood gas analysisg yBlood culture and CBC
Learning Objective 5 Visual 35
Meconium Aspiration SyndromeMeconium Aspiration Syndrome (MAS) (cont)Investigations for MAS
Radiologic studiesChest X-ray: findings include patchy infiltrates, coarse streaking of both lung fields, hyperinflation of the lung and flattening of the diaphragm.
Learning Objective 5 Visual 36
Meconium Aspiration SyndromeMeconium Aspiration Syndrome (MAS) (cont)
Management of MASPrenatal management:
Identification of high-risk pregnancy.Monitoring of fetal heart rate during labor.Amnioinfusion (?)( )
Learning Objective 5 Visual 38
Meconium Aspiration SyndromeMeconium Aspiration Syndrome (MAS) cont)Management of MAS
D li t (if i ti fl id i Delivery room management: (if amniotic fluid is meconium stained)
Ob t t i l S ti f th h b b t t i i Obstetrical: Suction of the oropharynx by obstetrician before delivery of shoulders.Pediatric: Visualization of vocal cords and tracheal Pediatric: Visualization of vocal cords and tracheal suction if infant is not breathing.
Learning Objective 5 Visual 39
Meconium Aspiration SyndromeMeconium Aspiration Syndrome (MAS) (cont)
General Management of Neonate with MASEmpty the stomach contents to avoid further Empty the stomach contents to avoid further aspiration.Correction of metabolic abnormalities e g hypoxia Correction of metabolic abnormalities e.g. hypoxia, acidosis, hypoglycemia, hypocalcemia and hypothermia.ypSurveillance for end organ hypoxic/ischemic damage (brain, kidney, heart and liver).
Learning Objective 5 Visual 40
Meconium Aspiration SyndromeMeconium Aspiration Syndrome (MAS) (cont)
Respiratory Management of Neonate with MASFrequent suction and chest vibrationFrequent suction and chest vibration.Pulmonary toilet to remove residual meconium if
intubatedintubated.Antibiotic coverage (ampicillin and gentamicin).Use CPAPUse CPAP.
Learning Objective 5 Visual 41
Meconium Aspiration SyndromeMeconium Aspiration Syndrome (MAS) (cont)Outcome and Prognosis (MAS)
Mortality rate may be as high as 50% Mortality rate may be as high as 50%. Survivors may suffer from bronchopulmonary d l i d l i ldysplasia and neurologic sequelae.
Learning Objective 5 Visual 42
Air Leak SyndromesDefinitionDefinitionThe air leaks syndromes (pneumomediastinum, pneumothorax pulmonary interstitial emphysema pneumothorax, pulmonary interstitial emphysema and pneumopericardium) comprise a spectrum of diseases with the same underlying diseases with the same underlying pathophysiology. Overdistension of alveolar sacs or terminal airways leads to disruption of airway or terminal airways leads to disruption of airway integrity, resulting in dissection of air into surrounding spacesLearning Objective 6 Visual 43
surrounding spaces.
Air Leak Syndromes (cont)
IncidenceMost commonly seen in neonates with lung Most commonly seen in neonates with lung disease who are on ventilatory support but can also occur spontaneously The more severe the also occur spontaneously. The more severe the lung disease, the higher the incidence of pulmonary air leakpulmonary air leak.
Learning Objective 6 Visual 44
Air Leak Syndromes (cont)
Risk Factors for Air Leak Syndromes
Spontaneous 0.5%Ventilatory support 15-20%CPAP 5% Meconium staining / aspirationg pSurfactant therapyVigorous resuscitation (bag ventilation)
Learning Objective 6 Visual 45
Vigorous resuscitation (bag ventilation)
Air Leak Syndromes (cont)
Clinical Presentation of Neonates with Air Leak SyndromesSyndromes
Respiratory distress or sudden deterioration of clinical course with alteration of vital signs and worsening of course with alteration of vital signs and worsening of blood gases.Asymmetry of thorax is present in unilateral casesAsymmetry of thorax is present in unilateral cases.
Learning Objective 6 Visual 48
Air Leak Syndromes (cont)
Investigations for Air Leak Syndromes
The definitive diagnosis of all air leak syndromes is made radiographically by an A-P chest X-ray film and a made radiographically by an A P chest X ray film and a lateral film.
Learning Objective 6 Visual 49
Air Leak Syndromes (cont)M t f Ai L k S dManagement of Air Leak Syndromes
GeneralAvoid ventilatorsCareful use of manual bag ventilation
SpecificDecompression of air leak according to the type.Do not needle the chest
Learning Objective 6 Visual 51
AApneaDefinitionDefinition
Cessation of respiration accompanied by bradycardia and/or cyanosis for more than 20 bradycardia and/or cyanosis for more than 20 seconds.
IncidenceIncidence50-60% of preterm neonates have evidence of apnea (35% with central apnea, 5-10% with apnea (35% with central apnea, 5 10% with obstructive apnea, and 15-20% with mixed apnea).
Learning Objective 7 Visual 52
p )
A ( t)Apnea (cont)Risk Factors of Neonatal ApneaRisk Factors of Neonatal Apnea
Pathological apneaHypothermiaHypoglycemia
Cardiac diseaseLung disease
AnemiaHypovolemia
Gastro intestinal refluxAirway obstruction
AspirationNEC / Distension
Infection, meningitisNeurological disorders
Learning Objective 7 Visual 53
Apnea (cont)I ti tiInvestigations
Monitoring at-risk neonates less than 32 weeks t ti l gestational age.
Evaluate for a possible underlying cause.Laboratory studies should include a CBC, blood gas analysis, serum glucose, electrolyte, and
l i l lcalcium levels.Radiologic studies if chest disease is suspected
Learning Objective 7 Visual 54
Apnea (cont)Apnea (cont)Management of Apnea
General Therapy General Therapy Perform tactile stimulation.CPAP i t d l d CPAP in recurrent and prolonged apnea. Pharmacological therapy (caffeine or theophylline) may be requiredmay be required.
Monitor levels.
Learning Objective 7 Visual 55
Apnea (cont)
Management of ApneaSpecific TherapySpecific Therapy
Treatment of the cause, if identified, eg. treatment of sepsis hypoglycemia anemia and electrolyte sepsis, hypoglycemia, anemia, and electrolyte abnormalities.
Learning Objective 7 Visual 56
Apnea (cont)
Outcome and Prognosis
I t t l ith t th In most neonates apnea resolves without the occurrence of long-term deficiencies.
Learning Objective 7 Visual 57