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Pediatrics Topics - Harriet Lane Handbook (23rd Edition)

Introductory

• Pediatric Parameters and Equipment - Age-based normal values, equipment sizing

Chapter 1: Emergency and Critical Care Management

• Approach to the unresponsive child (CPR, C-A-B)
• Management of shock (hypovolemic, distributive, cardiogenic, obstructive)
• Common pediatric emergencies: status asthmaticus, altered consciousness, status epilepticus, anaphylaxis

Chapter 2: Traumatic Injuries

• Primary and secondary survey
• Head trauma, concussion, return-to-play guidelines
• Dental and orthopedic injuries
• Non-accidental trauma

Chapter 3: Toxicology

• Approach to the poisoned child
• Specific toxidromes and antidotes
• Common ingestions

Chapter 4: Procedures

• Vascular access, lumbar puncture, thoracentesis, airway management

Chapter 5: Adolescent Medicine

• Puberty and growth
• Reproductive health, STIs, contraception
• Eating disorders, substance use, mental health screening

Chapter 6: Analgesia and Procedural Sedation

• Pain assessment tools
• Opioid and non-opioid analgesics
• Procedural sedation protocols

Chapter 7: Cardiology

• Congenital heart disease (acyanotic vs. cyanotic)
• Arrhythmias in children
• Heart failure, cardiomyopathy
• ECG interpretation in pediatrics

Chapter 8: Dermatology

• Common pediatric rashes
• Eczema, urticaria, infections
• Newborn skin findings

Chapter 9: Development, Behavior, and Developmental Disability

• Developmental milestones (gross motor, fine motor, language, social)
• ADHD, autism spectrum disorder
• Intellectual disability, learning disorders

Chapter 10: Endocrinology

• Diabetes mellitus (Type 1 in children, DKA management)
• Thyroid disorders
• Adrenal insufficiency, growth disorders
• Puberty disorders (precocious, delayed)

Chapter 11: Fluids and Electrolytes

• Maintenance fluid requirements (Holliday-Segar method)
• Dehydration assessment and rehydration
• Electrolyte disorders (Na, K, Ca, Mg, Phos)
• Acid-base disturbances

Chapter 12: Gastroenterology

• Gastroesophageal reflux
• Inflammatory bowel disease in children
• Constipation, acute abdomen
• Liver disease and neonatal jaundice

Chapter 13: Genetics: Metabolism and Conditions With Distinctive Appearance

• Inborn errors of metabolism
• Chromosomal syndromes (Down, Turner, etc.)
• Newborn screening

Chapter 14: Hematology

• Anemia (iron deficiency, hemolytic, aplastic)
• Sickle cell disease
• Bleeding disorders (hemophilia, ITP, vWD)
• Transfusion guidelines

Chapter 15: Immunology and Allergy

• Primary immunodeficiencies
• Food allergies and anaphylaxis
• Asthma (allergic)
• Autoimmune conditions

Chapter 16: Immunoprophylaxis

• Childhood immunization schedule
• Vaccine types, contraindications, adverse reactions
• Catch-up vaccination
• Passive immunization

Chapter 17: Microbiology and Infectious Disease

• Fever without source (neonatal, infant, child)
• Common bacterial, viral, fungal infections
• Antibiotic selection and resistance
• Meningitis, sepsis, osteomyelitis

Chapter 18: Neonatology

• Newborn resuscitation (NRP)
• Prematurity and its complications
• Respiratory distress syndrome, BPD
• Neonatal sepsis, hyperbilirubinemia
• Neonatal abstinence syndrome

Chapter 19: Nephrology

• Urinary tract infections
• Nephrotic and nephritic syndrome
• Acute kidney injury
• Hypertension in children

Chapter 20: Neurology

• Seizures and epilepsy
• Headache (migraine)
• Neurocutaneous syndromes
• Movement disorders, CNS infections

Chapter 21: Nutrition and Growth

• Breastfeeding and formula feeding
• Growth charts and failure to thrive
• Vitamin and mineral deficiencies
• Obesity in children

Chapter 22: Oncology

• Childhood leukemia (ALL, AML)
• Solid tumors (Wilms, neuroblastoma, brain tumors)
• Oncologic emergencies

Chapter 23: Palliative Care

• Pain management in terminal illness
• Goals-of-care conversations
• Hospice in pediatrics

Chapter 24: Psychiatry

• Depression and anxiety in children
• Suicidality assessment
• Psychotropic medications in pediatrics
• ADHD pharmacotherapy

Chapter 25: Pulmonology and Sleep Medicine

• Asthma management (stepwise therapy)
• Cystic fibrosis
• Pneumonia, bronchiolitis, croup
• Obstructive sleep apnea in children

Chapter 26: Radiology

• Imaging modalities and radiation safety
• Common pediatric radiologic findings
• When to image vs. clinical management

Chapter 27: Rheumatology

• Juvenile idiopathic arthritis (JIA)
• Systemic lupus erythematosus (SLE)
• Kawasaki disease
• Vasculitides

Chapter 28: Blood Chemistry and Body Fluids

• Normal laboratory reference ranges by age
• CSF, pleural, synovial fluid interpretation

Chapter 29: Biostatistics and Evidence-Based Medicine

• Study design, bias, NNT, sensitivity/specificity

Chapter 30: Drug Dosages

• Weight-based pediatric drug formulary

Chapter 31: Drugs in Kidney Failure

• Dose adjustments for renal impairment

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🍼 NEONATOLOGY - Exam-Oriented Notes

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I. NEWBORN RESUSCITATION

Key Algorithm Points (C-A-B)

• Meconium-stained fluid: Routine suctioning NOT recommended (even for non-vigorous infants) - current guideline change
• Delayed cord clamping: ≥30-60 seconds for vigorous term AND preterm infants
• Cord milking: Do NOT use for infants <28 weeks GA (risk of IVH). Insufficient evidence for ≥32 weeks

ETT Size Quick Formula

• ETT depth = Weight (kg) + 6 cm

Vascular Access Pearl

During emergent UVC placement, insert just far enough to get blood return - no measurement/x-ray needed before emergent use

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II. APGAR SCORE (Table 18.2)

• 7-10: Normal
• 4-6: Moderately depressed
• 0-3: Severely depressed

Exam tip: APGAR assesses need for resuscitation at 1 & 5 min. If <7 at 5 min, continue at 5-min intervals up to 20 min. 10-minute APGAR ≤5 is a criterion for therapeutic hypothermia in HIE.

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III. GESTATIONAL AGE CLASSIFICATION

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IV. ROUTINE NEWBORN CARE - Checklist

1. Vitamin K IM - hemorrhagic disease prevention
2. Erythromycin ophthalmic ointment - GC prophylaxis
3. Hep B vaccine before discharge
4. Newborn metabolic screen - first 72 hrs, ≥24 hrs after feeding
5. Critical CHD screen - pre + postductal SpO2
6. Hearing screen
7. Bilateral red reflex - rule out retinoblastoma, cataract
8. Breastfeeding: 8-12 times/day
9. First void and meconium stool within 24 hrs
10. Alert if weight loss >10%

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V. FLUIDS, ELECTROLYTES, AND NUTRITION

Maintenance Fluid Requirements (mL/kg/24 hr)

Glucose Infusion Rate (GIR)

• Preterm: 5-6 mg/kg/min (target glucose 40-100 mg/dL)
• Term: 3-5 mg/kg/min
• Formula: GIR = 0.167 × [dextrose %] × [rate mL/hr] ÷ weight (kg)

Vitamin supplementation

• Vitamin D: 400 IU/day for ALL infants from birth to 12 months (regardless of feeding mode)
• Iron (preterm): 2-6 mg/kg/day elemental iron once on full feeds (~day 10-14)
• Infants <34 weeks need breastmilk fortifier (higher Ca, Phos, Na, Fe, Vit D requirements)

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VI. CYANOSIS IN THE NEWBORN

Differential: Central vs Peripheral Cyanosis

• Central cyanosis (tongue/mucous membranes blue) = true hypoxemia - pathologic
• Peripheral cyanosis (acrocyanosis) = normal in first 24-48 hrs

Hyperoxia Test

• Give 100% FiO2 for 10 minutes
• If PaO2 rises to >150 mmHg → likely pulmonary cause
• If PaO2 stays <100 mmHg → likely cardiac (R→L shunt, cyanotic CHD)

5 T's of Cyanotic CHD (mnemonic)

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VII. RESPIRATORY DISEASES

A. Respiratory Distress Syndrome (RDS)

• Prematurity (most important)
• Maternal diabetes
• C-section without labor
• Perinatal asphyxia, second twin

• Surfactant therapy (1st dose in delivery room if ≤26 weeks GA)
• Ventilatory support (CPAP or intubation)
• Antenatal steroids (betamethasone) given >24 hrs and <7 days before delivery; repeat dose if <34 weeks and prior course >14 days ago

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B. Persistent Pulmonary Hypertension of the Newborn (PPHN)

1. Mechanical ventilation with adequate oxygenation
2. Minimize pulmonary vasoconstriction (avoid acidosis, hypothermia, pain)
3. Inhaled nitric oxide (iNO) - selective pulmonary vasodilator
4. ECMO if refractory

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C. Transient Tachypnea of the Newborn (TTN)

• Cause: Retained fetal lung fluid - most common in C-section babies and late preterm
• Presentation: Tachypnea starts at birth, resolves by 24-72 hrs
• CXR: Fluid in fissures, perihilar streaking, mild hyperinflation
• Management: Supplemental O2, supportive care; self-limited

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D. Pneumothorax

• Spontaneous or complication of RDS/surfactant/MAS
• CXR: Hyperlucency, compressed lung
• Management: Transillumination at bedside; needle decompression or chest tube if symptomatic

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VIII. APNEA AND BRADYCARDIA

Apnea of Prematurity

• Definition: Pause in breathing ≥20 seconds OR shorter pause with bradycardia/desaturation
• Central apnea: No respiratory effort (most common in prematurity)
• Obstructive apnea: Airway obstruction with continued effort
• Mixed: Both

1. Caffeine citrate - first-line (loading 20 mg/kg, maintenance 5-10 mg/kg/day)
2. Prone positioning (in-hospital only)
3. CPAP
4. Stimulation

Exam pearl: Caffeine also reduces BPD, improves neurodevelopmental outcomes

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IX. PATENT DUCTUS ARTERIOSUS (PDA)

Diagnosis

• Murmur: Systolic (or continuous "machinery") murmur - left upper sternal border / left infraclavicular
• Bounding pulses + widened pulse pressure if large shunt
• Echo: Gold standard
• CXR: Cardiomegaly + ↑pulmonary vascular markings

Management

Exam pearl: Ibuprofen = indomethacin in efficacy but fewer renal adverse effects; acetaminophen is newest option

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X. NEONATAL JAUNDICE (HYPERBILIRUBINEMIA)

Unconjugated vs Conjugated

Physiologic vs Pathologic Jaundice

Risk Factors for Significant Hyperbilirubinemia

• Exclusive breastfeeding + weight loss
• Cephalohematoma/bruising
• ABO/Rh incompatibility
• Sibling with jaundice requiring phototherapy
• East Asian race
• GA <38 weeks
• Hemolytic disease (G6PD deficiency)

Management

• Phototherapy: Based on nomogram (AAP Bhutani curve) - treats by photo-isomerization of bilirubin to water-soluble form
• Exchange transfusion: For extreme hyperbilirubinemia or bilirubin encephalopathy (kernicterus)
• Bilirubin encephalopathy (Kernicterus) signs: Lethargy, poor feeding, high-pitched cry, opisthotonus, seizures

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XI. NECROTIZING ENTEROCOLITIS (NEC)

Modified Bell's Staging

Management

• NPO + NG decompression
• IV fluids, correct perfusion
• Broad-spectrum antibiotics 7-10 days
• Surgical consultation (surgery for perforation/necrosis)

NEC Prevention

• Breast milk is most protective (reduces NEC by ~50%)
• Probiotics (controversial)
• Slow advancement of feeds in preterm infants
• Avoid prolonged use of antibiotics

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XII. NEUROLOGIC DISEASES

A. Neonatal Hypoxic-Ischemic Encephalopathy (HIE)

• Cord/1st hour blood gas: pH <7.0 OR base deficit >16
• If pH 7.01-7.15 / BD 10-15.9 → need additional criteria:
  • 10-min APGAR ≤5, OR
  • Need for assisted ventilation ≥10 minutes, OR
  • Moderate-severe encephalopathy on Sarnat exam

Severity and Outcomes of HIE (Sarnat Classification)

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B. Intraventricular Hemorrhage (IVH)

• 30-40% of infants <1500 g
• 50-60% of infants <1000 g
• Highest incidence in first 72 hours of life

Papile Grading System

Exam pearl: Grade III-IV associated with worst prognosis. Prevention: antenatal steroids, avoid cord milking <28 wks.

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C. Neonatal Seizures

• Hypoxic-ischemic encephalopathy (most common)
• Infection (meningitis/sepsis)
• Electrolyte disturbance (hypoglycemia, hypocalcemia, hyponatremia)
• Metabolic (IEM, pyridoxine deficiency)
• Malignant/structural (cortical dysplasia, stroke)

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D. Neonatal Abstinence Syndrome (NAS) / Neonatal Opioid Withdrawal

• CNS: High-pitched cry, irritability, tremors, seizures, poor sleep
• GI: Poor feeding, vomiting, loose stools
• Autonomic: Fever, sweating, yawning, sneezing, mottling

• Rooming-in, skin-to-skin, reduce stimulation
• Breastfeeding (if no contraindications)
• Morphine or methadone (first-line pharmacotherapy if severe)
• Clonidine or phenobarbital (adjunct)

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E. Brachial Plexus Injuries (Peripheral Nerve)

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XIII. RETINOPATHY OF PREMATURITY (ROP)

Screening Criteria

• All infants ≤30 weeks GA or birth weight <1500 g

• 30 weeks if unstable clinical course requiring cardiorespiratory support

Screening Timing

• ≤27 weeks: at 31 weeks postmenstrual age
• ≥28 weeks: at 4 weeks chronologic age
• <25 weeks: consider at 6 weeks chronologic age (risk of aggressive posterior ROP)

ROP Staging (International Classification)

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XIV. GASTROINTESTINAL - BILIOUS EMESIS (Differential)

Exam pearl: Bilious emesis in a newborn = malrotation with volvulus until proven otherwise - immediate surgical emergency

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XV. ABDOMINAL WALL DEFECTS

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HIGH-YIELD EXAM PEARLS SUMMARY

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📝 NEONATOLOGY - Exam Question Set

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TOPIC 1: APGAR SCORE

• A) 4
• B) 5
• C) 6
• D) 7

Answer: C - 6 HR <100 = 1, Resp = 1, Tone = 1, Reflex = 1, Color = 1 (acrocyanosis) = 6

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• A) <7
• B) <5
• C) <4
• D) 0-3

Answer: D - Score 0-3 = severely depressed, immediate resuscitation. Score 4-6 = moderate, stimulation + O2. Score 7-10 = normal.

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Answer:

• A - Appearance (color)
• P - Pulse (heart rate)
• G - Grimace (reflex irritability)
• A - Activity (muscle tone)
• R - Respiration

Assessed at 1 minute and 5 minutes. If <7 at 5 min → repeat every 5 min up to 20 minutes. A 10-minute APGAR ≤5 is a criterion for therapeutic hypothermia (HIE workup).

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• A) Color
• B) Heart rate
• C) Muscle tone
• D) Respiratory effort

Answer: B - Heart rate is the most important and sensitive indicator. Bradycardia (<100) or absent HR drives immediate CPR decision.

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TOPIC 2: NEONATAL RESUSCITATION (NRP)

• A) Immediately intubate and suction trachea
• B) Suction mouth then nose with bulb syringe
• C) Routine care; no special airway suctioning
• D) Administer surfactant immediately

Answer: C - Current NRP guidelines (2021): routine intrapartum suctioning and tracheal intubation are NOT recommended for vigorous OR non-vigorous meconium-stained infants.

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• A) 2.0 mm
• B) 2.5 mm
• C) 3.0 mm
• D) 3.5 mm

Answer: C - 3.0 mm (30-34 weeks GA → 3.0 mm)

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• A) 7 cm
• B) 8 cm
• C) 8.8 cm
• D) 9.5 cm

Answer: C - 8.8 cm Formula: Weight (kg) + 6 = 2.8 + 6 = 8.8 cm

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Answer:

1. Warm - dry, stimulate
2. Airway - position, clear secretions
3. Breathing - PPV (positive pressure ventilation) if not breathing or HR <100
4. Circulation - chest compressions if HR <60 after 30 sec PPV
5. Drugs - epinephrine IV/IO if HR <60 after compressions

C-A-B = Compressions/Circulation → Airway → Breathing (to reduce "no blood flow" time in cardiac arrest)

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• A) 10-20 seconds
• B) 30-60 seconds
• C) 2-3 minutes
• D) Until cord stops pulsating

Answer: B - 30-60 seconds minimum. Benefits: ↑ iron stores, ↑ Hb, improved neurodevelopment.

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TOPIC 3: RDS vs TTN vs MAS

• A) Meconium aspiration syndrome
• B) Transient tachypnea of the newborn
• C) Respiratory distress syndrome
• D) Pneumothorax

Answer: C - RDS (surfactant deficiency, preterm, ground glass CXR)

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• A) TTN occurs only in preterm infants
• B) TTN shows ground glass on CXR
• C) TTN resolves within 24-72 hours; RDS worsens over 48-72 hours
• D) TTN requires surfactant therapy

Answer: C - TTN is self-limited (resolves 24-72 hrs). RDS worsens first 48-72 hrs then improves with brisk diuresis.

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Answers: RDS = C, TTN = B, MAS = A

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• A) Maternal diabetes
• B) Maternal hypertension
• C) Cesarean section without labor
• D) Second twin

Answer: B - Maternal HTN, sickle cell disease, IUGR, PROM, narcotic addiction, fetal stress = accelerate lung maturity. Maternal diabetes, C-section without labor = INCREASE RDS risk.

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• A) Prophylactic surfactant at birth
• B) Antenatal betamethasone given 24 hrs to 7 days before delivery
• C) Indomethacin tocolysis
• D) Prophylactic CPAP from birth

Answer: B - Antenatal steroids (betamethasone/dexamethasone): optimal timing >24 hrs and <7 days before delivery.

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TOPIC 4: PHYSIOLOGICAL vs PATHOLOGICAL JAUNDICE

• A) Physiological jaundice
• B) Breast milk jaundice
• C) Pathological jaundice
• D) ABO incompatibility cannot be excluded

Answer: C (and D) - Jaundice within the first 24 hours = ALWAYS pathological. ABO/Rh hemolysis must be excluded urgently.

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• A) >5 mg/dL
• B) >8 mg/dL
• C) >12 mg/dL
• D) Any level (jaundice at 24 hrs = immediate evaluation + phototherapy)

Answer: D - Jaundice in first 24 hrs is always pathological and warrants immediate bilirubin measurement and treatment per AAP nomogram. No "safe" level at 24 hours.

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• A) Cephalohematoma
• B) G6PD deficiency
• C) Formula feeding
• D) ABO incompatibility

Answer: C - Formula feeding is protective. Exclusive breastfeeding is a risk factor (breastfeeding jaundice = inadequate intake → ↑ enterohepatic circulation).

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TOPIC 5: KERNICTERUS

• A) Neonatal meningitis
• B) Hypoglycemia
• C) Acute bilirubin encephalopathy (kernicterus)
• D) Neonatal tetanus

Answer: C - Acute bilirubin encephalopathy. Classic triad: hypotonia → hypertonia + opisthotonus, high-pitched cry, poor feeding, seizures.

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• A) Cerebral cortex
• B) Basal ganglia, hippocampus, cranial nerve nuclei
• C) Cerebellum
• D) Brainstem only

Answer: B - Unconjugated (lipid-soluble) bilirubin deposits in basal ganglia, subthalamic nuclei, hippocampus, and cranial nerve nuclei.

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• A) IV albumin infusion
• B) Exchange transfusion
• C) Phenobarbital
• D) IVIG

Answer: B - Double-volume exchange transfusion (removes bilirubin + sensitized RBCs). IVIG can be used as adjunct in hemolytic disease (Rh/ABO incompatibility).

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TOPIC 6: BREASTFEEDING

• A) 4-6 times
• B) 6-8 times
• C) 8-12 times
• D) 12-16 times

Answer: C - 8-12 times/day (on demand, approximately every 2-3 hours)

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• A) Vitamin C 100 mg/day
• B) Vitamin D 400 IU/day
• C) Vitamin K 1 mg/day oral
• D) Iron 1 mg/kg/day from birth

Answer: B - Vitamin D 400 IU/day for all infants from birth to 12 months regardless of feeding mode. (Breast milk is deficient in Vitamin D.)

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• A) Maternal hepatitis B infection
• B) Maternal HIV infection (in high-income country with safe water)
• C) Maternal CMV infection
• D) Maternal fever

Answer: B - HIV is a contraindication in settings with safe formula access (high-income countries). Hepatitis B: breastfeeding is safe after infant receives HBV vaccine + HBIG within 12 hrs.

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1. Reduces NEC risk (~50% reduction in premature infants)
2. Reduces neonatal sepsis
3. IgA provides passive immunity
4. Reduces SIDS risk
5. Better neurodevelopmental outcomes
6. Reduces risk of childhood obesity, diabetes, allergies
7. Optimal nutrition (easily digestible, bioavailable)

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TOPIC 7: NEONATAL HYPOGLYCEMIA

• A) <40 mg/dL
• B) <45 mg/dL
• C) <50 mg/dL
• D) <60 mg/dL

Answer: A - <40 mg/dL (first 48 hrs). After 48 hrs: <50 mg/dL.

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• A) Term AGA infant, vaginal delivery
• B) Infant of diabetic mother (IDM), LGA
• C) Preterm infant on formula
• D) Post-term infant, AGA

Answer: B - IDM has fetal hyperinsulinism (from maternal hyperglycemia) → after cord clamping, insulin continues → rapid hypoglycemia. Also at risk: SGA, preterm, LGA.

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• A) IV dextrose bolus immediately
• B) Feed (breastfeed or formula) and recheck in 30 minutes
• C) Transfer to NICU
• D) Glucagon IM

Answer: B - Asymptomatic hypoglycemia in at-risk newborn: feed first (enteral glucose), then recheck. IV dextrose for symptomatic or failed enteral treatment.

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Category	Examples
↑ Insulin	IDM, Beckwith-Wiedemann, nesidioblastosis
↓ Substrate	Preterm, SGA/IUGR, starvation
↑ Glucose utilization	Sepsis, hypothermia, respiratory distress, polycythemia
Endocrine	Hypopituitarism, adrenal insufficiency, hypothyroidism
Metabolic	IEM (GSD, fatty acid oxidation defects)

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TOPIC 8: NEONATAL SEPSIS - Early vs Late Onset

• A) Staphylococcus aureus
• B) Group B Streptococcus (GBS)
• C) E. coli
• D) Listeria monocytogenes

Answer: B - GBS (Streptococcus agalactiae) - most common EOS pathogen. E. coli is second most common. Together they account for >70% of EOS.

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• A) Early-onset sepsis
• B) Late-onset sepsis
• C) Nosocomial sepsis
• D) Meningitis only

Answer: B - Late-onset sepsis = >72 hours to 3 months of age. GBS can cause both EOS and LOS.

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Feature	EOS	LOS
Age	<72 hours	>72 hrs to 3 months
Source	Vertical (maternal)	Nosocomial or community
Main organisms	GBS, E. coli, Listeria	GBS, CoNS, Staph aureus, Gram-neg enteric
Presentation	Respiratory distress, shock	Meningitis, bacteremia, focal infection

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• A) Fever >38°C
• B) Temperature instability (hypo- or hyperthermia)
• C) Seizures
• D) Petechiae

Answer: B - Temperature instability (often hypothermia in neonates, not fever). Neonates cannot mount a reliable fever response. Other signs: lethargy, poor feeding, apnea, grunting, jaundice.

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TOPIC 9: NEC (NECROTIZING ENTEROCOLITIS)

• A) "Double bubble" sign
• B) Pneumatosis intestinalis (air in bowel wall)
• C) Pneumoperitoneum
• D) Portal venous gas

Answer: B - Pneumatosis intestinalis - hallmark of NEC on AXR. Pneumoperitoneum = perforated bowel (Bell Stage IIIB) = surgical emergency.

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• A) Stage IIA
• B) Stage IIB
• C) Stage IIIA
• D) Stage IIIB

Answer: B - Stage IIB: Portal venous gas + metabolic acidosis + thrombocytopenia + moderate illness.

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• A) Prophylactic fluconazole
• B) Prophylactic antibiotics for 5 days
• C) Breast milk feeding
• D) Slow-drip continuous feeds

Answer: C - Breast milk - reduces NEC incidence by ~50% due to secretory IgA, lactoferrin, lysozyme, and immunologic factors.

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• A) Bell Stage IIB is confirmed
• B) There is pneumatosis intestinalis on AXR
• C) There is pneumoperitoneum (perforation) or clinical deterioration despite medical management
• D) WBC >20,000

Answer: C - Surgery (peritoneal drain or laparotomy) for perforation (pneumoperitoneum) or necrotic bowel that doesn't respond to medical management.

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TOPIC 10: MECONIUM ASPIRATION SYNDROME (MAS)

• A) Prematurity <32 weeks
• B) Post-term pregnancy (>42 weeks) with fetal distress
• C) Maternal diabetes
• D) Prolonged PROM

Answer: B - MAS occurs in post-term or term infants with fetal distress/hypoxia. Meconium passage in utero = sign of fetal distress. Rare before 34 weeks (meconium not present in immature bowel).

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• A) Immediate intubation + tracheal suction
• B) Stimulate and give O2 only
• C) Start PPV immediately (NRP algorithm)
• D) Chest compressions first

Answer: C - Current NRP (2021): Start resuscitation (PPV) immediately regardless of meconium. Tracheal intubation for meconium suctioning is no longer recommended even for non-vigorous infants. PPV takes priority.

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• A) Surfactant deficiency only
• B) Ball-valve obstruction → air trapping + chemical pneumonitis + surfactant inactivation + PPHN
• C) Retained fetal lung fluid
• D) Pulmonary hypoplasia

Answer: B - MAS is multifactorial:

1. Ball-valve obstruction → air trapping → hyperinflation (barrel chest on CXR)
2. Chemical pneumonitis (meconium is caustic)
3. Surfactant inactivation
4. PPHN (pulmonary vasoconstriction)

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• A) Diffuse symmetric ground glass, low lung volumes
• B) Fluid in horizontal fissure, perihilar streaking
• C) Coarse irregular infiltrates, hyperinflation, "rope-like" opacities
• D) Unilateral hyperlucency

Answer: C - MAS: patchy coarse infiltrates + hyperinflation (air trapping). Compare: RDS = ground glass + low volumes; TTN = perihilar streaking + fluid in fissures.

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RAPID-FIRE SUMMARY TABLE

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🏥 NEONATAL RESUSCITATION - The Complete Step Ladder

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🧠 THE MASTER MEMORY AID FIRST

"Can A Baby Breathe Completely? Every Doctor Knows"

Cord → Assess → Basic Initial Steps → Breathing (PPV) → Compressions → Epinephrine → Decide (stop or continue) → Keep warm throughout

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📋 PRE-BIRTH: The 4 Questions (Ask before every delivery)

Memory Aid: "GAM-R"

• Gestational age? (term vs. preterm)
• Amniotic fluid clear? (meconium?)
• More than one baby?
• Risk factors for resuscitation?

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THE STEP LADDER

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BIRTH
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STEP 0 — CORD MANAGEMENT
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Memory aid for exclusions (no delay): "MOM's PLACENTA Can't Wait" Monochorionic twins, Obstetric emergency, Maternal instability, Placenta previa/abruption, Low birthweight IUGR reversed flow, Abdominal wall defect, Congenital diaphragmatic hernia, Transfusion (TTTS)

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STEP 1 — RAPID ASSESSMENT (30 seconds)
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Memory: "TBA"

• Term? (≥37 weeks?)
• Breathing/crying?
• Adequate tone?

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STEP 2 — INITIAL STEPS (60 seconds = "Golden Minute")
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Memory: "WASTE No Time"

• Warm (radiant warmer, prewarmed blankets, hat)
• Airway (position - neutral/sniffing position)
• Stimulate (dry, rub back/soles of feet)
• Transparent? (assess color - not for management)
• Evaluate HR

⚠️ MECONIUM RULE (2025): Do NOT suction mouth/nose routinely even with thick meconium. Do NOT intubate for tracheal suctioning. Just start PPV if not breathing. (Changed from old guidelines)

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STEP 3 — PPV: POSITIVE PRESSURE VENTILATION
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Initial O2 concentration:

PPV settings (NRP 9th Ed):

• Rate: 40-60 breaths/min (say "breathe-2-3, breathe-2-3")
• PIP (≥32 weeks): 25 cmH₂O initial
• PIP (<32 weeks): 20-25 cmH₂O
• PEEP: 5 cmH₂O

Devices (in order of preference):

1. T-piece resuscitator (most reliable PEEP)
2. Self-inflating bag (no PEEP without valve)
3. Laryngeal mask airway (LMA) - now a primary device option in 9th Ed

Check after 15-30 seconds:

• Is HR improving? Is chest moving?
• If NO → immediately use MR. SOPA

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STEP 3B — MR. SOPA (Ventilation Corrective Steps)
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🔑 Memory: "MR. SOPA"

Letter	Action
M	Mask adjustment (check seal)
R	Reposition head (neutral "sniffing" position)
S	Suction mouth then nose
O	Open mouth (jaw thrust or open lips)
P	Pressure increase (try higher PIP)
A	Alternative airway (intubate or LMA)

⚡ 9th Edition change: Steps are NOT strictly sequential anymore. Use clinical judgment to skip to the most likely helpful step first!

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STEP 4 — CHEST COMPRESSIONS
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Technique:

Memory: "3:1 and Two Thumbs Up"

• Technique: Two-thumb encircling hands (preferred) OR 2-finger method
• Depth: 1/3 of AP chest diameter
• Ratio: 3 compressions : 1 breath
• Rate: 90 compressions + 30 breaths = 120 events/min
• Say: "1-and-2-and-3-and-breathe"

Simultaneous actions:

• Intubate (if not already done) - confirm with ETT CO2 colorimetric detector
• Increase O2 to 100% during compressions
• Insert UVC (umbilical venous catheter) - insert just enough to get blood return in emergency

⚠️ Do NOT start compressions before confirming ventilation is effective (ETT in place + chest moving)

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STEP 5 — MEDICATIONS: EPINEPHRINE
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Epinephrine (NRP 9th Edition - simplified doses):

Memory: "ETT gets MORE, IV gets less"

• ETT = 0.5-1 mL/kg (10x more volume)
• IV = 0.1-0.3 mL/kg

• Repeat every 3-5 minutes if HR remains <60
• After ETT dose given → establish IV/IO access immediately

Volume Expander (if hypovolemia suspected):

• Normal saline or O-negative blood
• Dose: 10 mL/kg IV over 5-10 minutes
• Suspect if: pallor, weak pulse, poor response to epinephrine, history of blood loss

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STEP 6 — REASSESS & DECIDE
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SpO2 Targets (NRP 9th Ed - targets start at 2 minutes):

Memory aid for SpO2 targets: "65→95 in 10 minutes, climbing 5% every minute" (approximate - starts at 2 min)

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STEP 7 — CESSATION OF RESUSCITATION
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• No HR detected at 10 minutes after birth despite adequate resuscitation → consider stopping
• Discuss with family, consider gestational age, likely etiology, reversibility
• If HR detected at any point → continue

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📊 COMPLETE ETT REFERENCE TABLE

Quick formula for depth: Weight (kg) + 6 = lip-to-tip in cm

• 1 kg baby → 7 cm
• 2 kg baby → 8 cm
• 3 kg baby → 9 cm

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🧠 ALL MEMORY AIDS IN ONE PLACE

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1. Pre-birth checklist:

"GAM-R" = Gestational age, Amniotic fluid, Multiple babies, Risk factors

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2. Rapid assessment at birth:

"TBA" = Term? Breathing? Adequate tone?

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3. Initial steps:

"WASTE" = Warm, Airway, Stimulate, Transparent (color), Evaluate HR

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4. Ventilation corrections:

"MR. SOPA" = Mask, Reposition, Suction, Open mouth, Pressure, Alternative airway

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5. Compressions ratio:

"3:1, 90+30=120" = 3 compressions : 1 breath, 90/min + 30/min = 120 events/min

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6. ETT depth:

"Weight + 6" = e.g., 2 kg → 8 cm at the lip

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7. ETT size:

"2.5 / 3 / 3.5" = <30 weeks / 30-34 weeks / >35 weeks Memory: "Two-and-a-half, Three, Three-and-a-half → as baby grows, tube grows"

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8. Starting O2:

"Room air for term, More O2 for preterm"

• Term (≥35 wks): 21%
• 32-34 wks: 21-30%
• <32 wks: ≥30%

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9. Epinephrine routes:

"ETT MORE, IV less" ETT: 0.5-1 mL/kg | IV: 0.1-0.3 mL/kg (both using 1:10,000 concentration)

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10. The whole algorithm in one sentence:

"Cord → TBA → WASTE → PPV → MR SOPA → Compress (3:1) → Epi → Decide"

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⚡ KEY NRP 9th EDITION CHANGES (2025) - Exam Traps

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🎯 EXAM ONE-LINE PEARLS

• "Breathe before you squeeze" → confirm effective ventilation BEFORE starting compressions
• "Effective = chest moving OR rising HR" → the only proof PPV is working
• "APGAR does not guide resuscitation" → assessed after the fact; HR is the real-time guide
• "No routine suction for meconium" → even non-vigorous infants get PPV first
• "UVC in emergency" → no x-ray needed, just get blood return
• "Stop at 10 min" → no ROSC after 10 min of adequate resuscitation → consider cessation
• "Compressions = always intubated" → never do compressions with just a mask

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