Role of the Pediatrician in Antenatal Care (ANC)

1. Antenatal Counseling (the Primary Role)

Neonatal Resuscitation Algorithm — Morgan and Mikhail's Clinical Anesthesiology, 7e

• Team briefing and equipment check prior to every high-risk delivery
• Reviewing maternal history, gestational age, fetal anomalies detected on antenatal ultrasound, and expected complications

2. High-Risk Pregnancy Consultation

3. Counseling Regarding Resuscitation at the Limits of Viability

• Discussion of prognosis at each gestational age (22–25 weeks)
• Parent-centered decision making regarding resuscitation vs. comfort care
• Documentation of antenatal consultation in the chart
• Per Mulholland & Greenfield's Surgery: "Antenatal counseling regarding resuscitation and intensive care before 25 weeks of gestation" is an established standard of care (Cummings J, Committee on Fetus and Newborn. Pediatrics 2015;136(3):588–595)

4. Fetal Anomaly Counseling

• The pediatric surgeon, neonatologist, or relevant subspecialist meets with the family antenatally
• Explains postnatal management plan (e.g., for CDH, orofacial clefts, cardiac defects, renal anomalies)
• Coordinates delivery at an appropriate level of care (tertiary center if needed)
• Example: "Most families find antenatal counseling helpful in planning for care of the child with an orofacial cleft" — Cummings Otolaryngology Head and Neck Surgery

5. Planning for Delivery Room Readiness

• Ensures appropriate resuscitation equipment is available and functional
• Assembles the resuscitation team (at least one provider whose sole responsibility is care of the newborn must be present at every delivery)
• Plans for surfactant therapy, intubation, umbilical line placement in anticipated preterm deliveries
• Arranges NICU bed and transport if necessary

6. Anticipatory Guidance to Parents

• Breastfeeding preparation and lactation support
• Newborn screening (metabolic, hearing, critical CHD)
• Immunization schedule starting at birth (Hepatitis B, BCG)
• Safe sleep practices (back to sleep, avoiding co-sleeping)
• Neonatal jaundice recognition
• Vitamin K and eye prophylaxis at birth
• Signs of neonatal illness requiring urgent care

7. Antenatal Genetic Counseling (Collaborative)

• The clinical geneticist and pediatric specialist jointly counsel the family
• Explain natural history, management options, recurrence risks, and prognosis
• Coordinate multidisciplinary team for delivery (Emery's Elements of Medical Genetics and Genomics)

Summary

References:

• Morgan and Mikhail's Clinical Anesthesiology, 7e — Neonatal Resuscitation
• Creasy & Resnik's Maternal-Fetal Medicine — Antenatal Monitoring
• Cummings Otolaryngology — Prenatal Diagnosis
• Mulholland & Greenfield's Surgery — citing AAP Committee on Fetus and Newborn, Pediatrics 2015

Birth Asphyxia (Perinatal/Neonatal Asphyxia)

Definition

"Nearly 25% of neonatal deaths worldwide result from birth asphyxia." — Tintinalli's Emergency Medicine

Epidemiology

• Incidence of HIE: 3–5 per 1000 live births in developed countries (stable despite advances in monitoring)
• Mortality: ~20% in the neonatal period
• Neurodevelopmental disability in survivors: ~25%
• Only 10% of all childhood brain injuries are attributable to intrapartum events — the majority are prenatal in origin

Etiology / Risk Factors

• Gestational diabetes mellitus
• Intrauterine growth restriction (IUGR)
• Pre-eclampsia / pregnancy-induced hypertension
• Multiple pregnancy

• Placental abruption
• Uterine rupture
• Cord accident (prolapse, tight nuchal cord)
• Maternal cardiac arrest
• Non-reassuring fetal heart rate tracing
• Meconium-stained amniotic fluid

• Need for resuscitation; low Apgar scores
• Medications used during labor (including anesthetic agents)
• Birth trauma

Pathophysiology

• ↓ Cerebral blood flow → Hypoxia → Switch from oxidative phosphorylation to anaerobic metabolism
• Depletion of high-energy phosphates (ATP)
• Lactic acid accumulation → metabolic acidosis
• Cellular dysfunction and death

• Transient return of cerebral metabolism → followed by secondary energy failure
• Excitotoxicity (glutamate release), apoptosis, reactive oxygen species, inflammation
• Intracellular Ca²⁺ influx, lipid peroxidation, nitric oxide accumulation

Clinical Presentation — Sarnat Staging System (1976)

Diagnosis

1. Clinical features of neonatal encephalopathy (↓consciousness, seizures, ↓tone/reflexes, respiratory depression) at ≥ 35 weeks gestation
2. Neonatal signs consistent with acute peripartum/intrapartum event:
   • Apgar score < 5 at 5 and 10 minutes
   • Umbilical artery pH < 7.0 or base deficit ≥ 12 mmol/L
   • Acute brain injury on MRI consistent with hypoxia-ischemia (deep gray matter or watershed injury)
   • Multisystem organ failure
3. Sentinel hypoxic/ischemic event occurring immediately before or during labor
4. Developmental outcome: spastic quadriplegia or dyskinetic cerebral palsy

• Cord pH < 7.0 = severe acidemia; 340-fold increased risk of seizures when combined with 5-min Apgar ≤5 and delivery room intubation

Neuroimaging

Multiorgan Injury

Management

A. Immediate — Delivery Room (NRP Algorithm)

• Antenatal counseling + team briefing before high-risk delivery
• Neonatal resuscitation as per NRP: warmth, airway, PPV, chest compressions, medications
• At least one qualified provider whose sole role is neonatal care must be present at every delivery

B. Passive Cooling (while transfer is arranged)

• Turn off the radiant warmer; do NOT actively cool
• Aim rectal temp 33–34°C during transport

C. Therapeutic Hypothermia (TH) — Standard of Care

• Cord gas or 1-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 min)

• Target temperature: 33°C–35°C for 72 hours
• Method: whole-body cooling or selective head cooling
• Must be performed at experienced comprehensive neonatal centers

D. Supportive Care

• Treat seizures (phenobarbital first line; phenytoin/levetiracetam second line)
• Correct hypoglycemia (hypoglycemia worsens HIE outcomes)
• Correct hypocalcemia, hyponatremia
• Avoid hyperoxia — titrate oxygen to SpO₂ 91–95%
• Treat PPHN if present (iNO, sildenafil)
• Monitor and support cardiac, renal, hepatic, and GI function

Prognosis

"Resolution of moderate encephalopathy by day 5 of life is associated with appropriate short-term neurodevelopmental outcome; persistence beyond 7 days is associated with death or severe disability." — Bradley and Daroff's Neurology

Key Points to Remember

1. Birth asphyxia = HIE; caused by impaired gas exchange → hypoxia + ischemia + acidosis
2. Sarnat staging guides prognosis and management decisions
3. Therapeutic hypothermia (33–35°C × 72 h) is the only proven neuroprotective intervention — must start within 6 hours of delivery
4. Systemic multi-organ injury always accompanies severe HIE — assess all organ systems
5. MRI (DWI) is the gold standard for imaging brain injury
6. The secondary (reperfusion) injury phase is the therapeutic target

References:

• Creasy & Resnik's Maternal-Fetal Medicine — Definition, Pathophysiology, Therapeutic Hypothermia
• Adams and Victor's Principles of Neurology, 12th Ed — Sarnat Staging, Neuropathology
• The Harriet Lane Handbook, 23rd Ed — Diagnostic Criteria, TH Protocol
• Bradley and Daroff's Neurology in Clinical Practice — Diagnosis, Prognosis
• Tintinalli's Emergency Medicine — Epidemiology, Resuscitation
• Morgan and Mikhail's Clinical Anesthesiology, 7e — NRP Algorithm

Birth Asphyxia (Perinatal HIE) — Quick Reference

Definition

Pathophysiology (Two-Phase Injury)

• ↓ CBF → anaerobic metabolism → ATP depletion → lactic acidosis → cell death

• Excitotoxicity (glutamate), apoptosis, reactive oxygen species, inflammation, intracellular Ca²⁺ influx

Sarnat Staging & Prognosis

Diagnosis (ACOG/AAP Criteria — reaffirmed 2020)

1. Neonatal encephalopathy at ≥ 35 weeks gestation (↓consciousness, ↓tone, seizures, respiratory depression)
2. Neonatal signs of acute peripartum event:
   • Apgar < 5 at 5 and 10 min
   • UA pH < 7.0 or base deficit ≥ 12 mmol/L
   • MRI showing deep gray matter / watershed injury
   • Multisystem organ failure
3. Sentinel event during/just before labor (abruption, cord accident, uterine rupture)
4. Outcome: Spastic quadriplegia or dyskinetic cerebral palsy

340-fold ↑ risk of seizures when 5-min Apgar ≤5 + delivery-room intubation + UA pH < 7.00 are all present

Multiorgan Injury

Management

1. Delivery Room — NRP Algorithm

• Antenatal counseling + team briefing (first step in NRP)
• Warmth → Airway → Breathing (PPV) → Circulation (chest compressions) → Drugs
• At least one dedicated provider for newborn at every delivery

2. Therapeutic Hypothermia (TH) ← Only proven neuroprotective therapy

• Cord/1-hour blood gas: pH < 7.0 or base deficit > 16
• pH 7.01–7.15 / BD 10–15.9 + additional criterion (10-min Apgar ≤5 OR ventilation ≥10 min)
• Moderate–severe encephalopathy on clinical exam

3. Supportive Care

Neuroimaging

Long-Term Sequelae

• Cerebral palsy (spastic quadriplegia, dyskinetic CP)
• Epilepsy
• Intellectual disability
• Developmental delay
• Cortical visual impairment

Resolution of moderate encephalopathy by day 5 → favorable short-term outcome; persistence beyond 7 days → death or severe disability (Bradley and Daroff's Neurology)

Glomus Tumors in ENT (Paragangliomas of the Head and Neck)

Definition & Overview

"Glomus tympanicum paragangliomas are the most common middle ear tumour." — Scott-Brown's Otorhinolaryngology

Endoscopic Appearance

Endoscopic image through the tympanic membrane: (A) Glomus jugulare, (B) Glomus tympanicum — Cummings Otolaryngology

Clinical Features

Glomus Tympanicum

• Pulsatile tinnitus (most common presenting symptom)
• Conductive hearing loss
• Small, reddish mass visible behind the tympanic membrane — all borders visible through TM = hallmark
• May be an incidental finding on exam when small
• Causes symptoms early due to proximity to ossicles and TM

Glomus Jugulare

• Pulsatile tinnitus
• Lower cranial nerve palsies (CNs IX, X, XI — "jugular foramen syndrome")
  • Dysphagia, hoarseness, shoulder weakness
  • CN XII involvement if large
• Facial nerve paresis (extension into mastoid)
• Sensorineural hearing loss (bony erosion of labyrinth)
• Symptoms appear late after considerable growth and bone destruction
• Erosion through TM → bleeding mass in the external auditory canal

Glomus Vagale

• Painless neck mass, vagal neuropathy

Diagnostic Evaluation

1. Otoscopy

• All borders of tumor visible behind TM → glomus tympanicum
• Borders NOT fully visible → may be large tympanicum OR glomus jugulare extending upward
• Associated cranial nerve abnormalities → more likely glomus jugulare

2. CT Scan (High-Resolution)

CT of glomus tympanicum: well-demarcated soft tissue nodule behind TM over the cochlear promontory (Scott-Brown's)

3. MRI (with contrast)

• Classic "salt and pepper" appearance on T1/T2 — combination of:
  • Flow voids from intratumoral vessels (pepper)
  • Areas of microhemorrhage (salt)
• Gadolinium enhancement is intense
• Defines intracranial extension, relationship to ICA

MRI showing salt-and-pepper pattern; angiography showing intense tumor blush and effect of embolization — Cummings Otolaryngology

4. Angiography

• Confirms highly vascular nature
• Feeding vessels from external carotid branches: ascending pharyngeal, middle meningeal (posterior division), stylomastoid, posterior auricular
• Performed in the same sitting as preoperative embolization

5. Urine Metanephrines (24-hour urine)

• 1–3% of glomus jugulare tumors are secretory (catecholamine-producing)
• Must be checked before surgery to avoid intraoperative hypertensive crisis
• Careful coordination with anesthesiology required if secreting

Classification Systems

Fisch Classification (Fisch, 1978) — Glomus Jugulare

Glasscock-Jackson Classification (1982)

Differential Diagnosis

• Aberrant ICA (aberrant internal carotid artery — do NOT biopsy!)
• High-riding/dehiscent jugular bulb
• Cholesterol granuloma
• Hemangioma
• Facial nerve schwannoma
• Meningioma
• Metastatic tumors (renal cell, breast, prostate)

Treatment

A. Surgical Resection — Primary Treatment

• Small tumors (all borders visible): Transcanal approach
• Larger tumors (borders not fully visible): Endaural or postauricular approach; mastoidectomy with extended facial recess approach

• Fisch Type A infratemporal fossa approach — most common
• Staging surgery may be needed for large intracranial extension
• Lower cranial nerve preservation is prioritized — nerve resection may require tracheostomy + gastrostomy
• Preoperative embolization (24–48 hours before surgery) is recommended for any sizeable glomus jugulare tumor:
  • Significantly reduces intraoperative blood loss and operative time
  • Must be done carefully — some embolization agents can cause cranial neuropathies

B. Radiotherapy — Increasingly Used

• Both conventional radiotherapy (with or without intensity modulation) and stereotactic radiosurgery achieve tumor control rates of 90–100%
• Used for:
  • Elderly or medically unfit patients
  • Unresectable tumors (Fisch D3)
  • Residual or recurrent tumors
  • Patient preference

C. Observation ("Watch and Wait")

• For elderly patients with small, slow-growing, asymptomatic tumors
• Serial imaging every 1–2 years

Key Points Summary

References:

• Cummings Otolaryngology Head and Neck Surgery — Paraganglioma, Surgical Approach, Radiotherapy
• Scott-Brown's Otorhinolaryngology Head & Neck Surgery, Vol 2 — Temporal Bone Paragangliomas, Imaging
• Harrison's Principles of Internal Medicine, 22E — Mixed/Conductive Hearing Loss differential