Section 122.3: Intracranial-Intraventricular Hemorrhage & Periventricular Leukomalacia

Germinal matrix IVH · Grading (I-IV) · PVL (cystic/diffuse) · Pathogenesis · Screening · Prognosis · Neurodevelopmental outcomes
🧠 Key concept: IVH risk inversely related to gestational age · PVL → cerebral palsy (spastic diplegia)

🧠 IVH & PVL: Core Concepts

📊 IVH Grading (Volpe)
Grade I: Germinal matrix only. Grade II: IVH filling <50% ventricle. Grade III: IVH >50% with ventricular dilation. PVHI (formerly grade IV): parenchymal hemorrhagic infarction.
⏱️ Timing of IVH
50% by 5h, 70% by 24h, 95% by 7 days. Late hemorrhage uncommon after day 14. Screening US at 7-10 days, repeat at 4-6 weeks.
🧬 PVL pathology
Cystic (macro/micro) and diffuse non-necrotic white matter injury. MRI more sensitive than US. Risk factors: inflammation, hypoxia, hypotension, NEC.
🛡️ Prevention
Antenatal corticosteroids (↓IVH), avoid hyperoxia/hypocarbia, maintain cerebral perfusion. Indomethacin prophylaxis reduces severe IVH but not NDI.
📈 Prognosis
Grade III-IV → 50-75% neurologic sequelae (CP, cognitive delay). PVL → spastic diplegia. Post-hemorrhagic hydrocephalus (PHH) needs shunt in 20-50%.
🩺 Screening recommendations
Cranial US for ≤30 wk GA or at risk. Repeat at term equivalent age. MRI for high-risk infants before discharge.
🔬 Pathogenesis: Fragile germinal matrix vessels + BP fluctuations + impaired autoregulation + coagulation disturbances + inflammation. PVL: oligodendrocyte precursor injury → myelination failure.

🔍 Clinical approach to suspected IVH or PVL in preterm infant

1
Recognize risk factors – Extreme prematurity (<28 wk), lack of antenatal steroids, respiratory distress syndrome, pneumothorax, hypotension, metabolic acidosis.
2
Identify clinical signs (catastrophic vs silent) – Sudden deterioration: hypotension, apnea, bradycardia, pallor, stupor, seizures, bulging fontanel, drop in hematocrit. Most IVH is silent.
3
Cranial ultrasound screening – Anterior + mastoid fontanelle views. First screen at 7-10 days, repeat at 4-6 weeks and term equivalent age.
4
Suspect PVL – Periventricular echogenicity (flare) on early US, later cystic changes (2-5 weeks) or ventriculomegaly. MRI at term for diffuse white matter injury.
5
Post-hemorrhagic hydrocephalus monitoring – Serial head circumference, fontanel tension, suture diastasis. US for ventricular index. Neurosurgical referral if progressive.

📋 Stepwise management of IVH and post-hemorrhagic hydrocephalus

1
Stabilization & supportive care – Avoid rapid volume expansion, hyperoxia, hypocarbia, BP fluctuations. Maintain cerebral perfusion pressure (MAP 30-40 mmHg in ELBW).
2
Transfusion & coagulation – Correct thrombocytopenia (platelets <50,000?), treat coagulopathy with FFP if active bleeding.
3
Monitor for post-hemorrhagic ventricular dilation (PHVD) – Serial head circumference and cranial US. Progressive ventriculomegaly (VI >97th percentile or rapid increase).
4
Interventions for PHVD – Lumbar punctures (if communicating hydrocephalus) or ventricular reservoir (e.g., Ommaya) for serial taps. Ventriculoperitoneal shunt if progressive and not responsive.
5
DRIFT (Drainage, Irrigation, Fibrinolytic Therapy) – Experimental but may improve cognitive outcomes in severe IVH.
6
Long-term follow-up – Neurodevelopmental clinic, early intervention (PT/OT), monitoring for CP (spastic diplegia), cognitive delay, epilepsy.
📌 Key preventive measures: Antenatal corticosteroids (single course 24-34 wk), delayed cord clamping, avoidance of hyperoxia/hypocarbia, minimal handling, head midline positioning.

🧠 Rapid reflex prompts – IVH & PVL

📌 Grade III IVH definition?
Intraventricular hemorrhage filling >50% of ventricle with ventricular dilation.
📌 Most common neurologic sequela of cystic PVL?
Spastic diplegia (lower extremities more affected).
📌 Timing of peak IVH occurrence?
First 72 hours (70% by day 1, 95% by day 7).
📌 Best imaging for diffuse white matter injury?
MRI at term-equivalent age (more sensitive than US for non-cystic PVL).
📌 Risk of neurodevelopmental impairment in grade IV (PVHI)?
~75% develop cerebral palsy or cognitive impairment.
📌 How often to screen for PHVD?
Weekly head circumference and US if ventriculomegaly; more frequent if rapidly progressive.