11.1 IVH and Extra/Intracranial Hemorrhage

11.1 IVH and Extra/Intracranial Hemorrhage

Quick Answer: Most germinal-matrix and intraventricular hemorrhage (IVH) in very preterm infants occurs in the first 72 hours. Papile grades I–IV name location and ventricular effect; grade IV is usually periventricular hemorrhagic infarction (PVHI), not a simple spill of ventricular blood into parenchyma. Protect a pressure-passive brain with gentle handling, stable carbon dioxide, and no rapid volume swings. Map every scalp swelling: caput succedaneum pits and crosses sutures, cephalohematoma does not cross sutures, and subgaleal hemorrhage can empty the circulating blood volume into the scalp. Give vitamin K and evaluate coagulopathy whenever a term or preterm infant bleeds inside the head without a clear, sufficient explanation.

Why the Germinal Matrix Bleeds

The germinal matrix is a densely cellular, richly vascular zone in the caudothalamic groove. During mid-gestation it produces neuronal and glial precursors. Before about 32–34 weeks it is packed with fragile capillaries sitting in a gelatinous matrix with almost no connective-tissue scaffolding. After that window the matrix involutes, which is why classic IVH is a disease of prematurity, not a random term-infant stroke pattern (term arterial stroke is section 11.2).

Cerebral blood flow in the extremely preterm infant is often pressure-passive: when mean arterial pressure rises or falls, flow rises or falls with it. There is little autoregulatory buffer. Hypoxia, hypercarbia, acidosis, and abrupt increases in cerebral venous pressure all raise the chance that those capillaries will rupture into the matrix and then into the lateral ventricle. The same physiology explains why a pneumothorax, a fighting intubation, a high-pressure bag-mask run, a rapid 20 mL/kg saline bolus, and Trendelenburg positioning during a diaper change can declare as a new echodensity on the next ultrasound.

Highest-risk infants are those born before 28 weeks, those under about 1000 g, those who needed significant resuscitation, and those with fluctuating oxygenation or blood pressure on day 1. Antenatal corticosteroids and delayed cord clamping reduce population risk. After birth, the bedside team still owns the hemodynamic environment. OpenExamPrep covers hemorrhage as a named neurologic patient problem on AACN Certification Corporation's current Neonatal CCRN Test Plan; this chapter is independent study material, not an AACN product.

Papile Grades I–IV — and What Grade IV Really Is

The Papile classification, originally from computed tomography, remains the language of cranial ultrasound reports and of most exam items:

Exam trap: do not treat grade IV as “worse grade III.” PVHI is a venous infarct of periventricular white matter. It is often unilateral, on the side of a large IVH, and it drives much of the later hemiparesis, visual-field, and cognitive burden. Some reports use Volpe language (germinal-matrix hemorrhage, IVH, intraparenchymal hemorrhage) for the same anatomy. You must still translate a report that says “grade IV” into venous infarction, not into a cartoon of ventricular blood bursting outward.

Unilateral versus bilateral disease, progressive versus stable clot, associated cerebellar hemorrhage, and white-matter injury all modify prognosis beyond a single Roman numeral. Cerebellar hemorrhage is easy to miss on a standard anterior-fontanelle view; mastoid windows matter in unstable extremely low-birth-weight infants.

Timing: The First 72 Hours

About half of IVH is already detectable in the first 24 hours. The large majority is present by 72 hours. A “normal” ultrasound at 12 hours of life does not clear the infant. Many units obtain an early study for the most immature or unstable infants, a screen at about 3–7 days for infants below a local gestational-age cutoff (commonly under 30–32 weeks), and a term-equivalent or pre-discharge study. Cystic white-matter injury appears days to weeks after the original insult, so a day-of-life-2 scan can miss periventricular leukomalacia (PVL) (section 11.2).

Clinical signs of a large acute IVH include a sudden hematocrit drop, metabolic acidosis, unexpected hyperglycemia, a full or tense fontanelle, temperature instability, seizures, apnea, or frank shock. Many grade I–II hemorrhages are silent and found only on screening. Treat the infant, not the grade: a silent grade III still needs serial head circumference, fontanelle checks, and a plan for PHH surveillance.

Prevention Bundle — What You Can Actually Control

You cannot unshed blood. You can avoid the insults that pop germinal-matrix vessels during the highest-risk window:

• Keep the head midline and the neck neutral. Avoid extreme hip flexion and Trendelenburg while the matrix is still fragile.
• Treat handling as a procedure. Cluster only what must be clustered. Protect sleep and thermal stability. Lifting the legs high for a diaper change is a venous-pressure event in a 500 g infant.
• Titrate volume. Rapid 10–20 mL/kg boluses raise cerebral arterial and venous pressure together. Correct true hypovolemia, but not as a reflexive slam for every low mean-pressure number.
• Guard PaCO2. Hypocarbia constricts the cerebral bed and is a classic pathway to white-matter injury. Hypercarbia dilates it and can contribute to hemorrhage. Avoid both extremes and sudden swings during intubation, suction, and ventilator changes. Mid-40s mm Hg is a typical conventional target range unless a unit protocol says otherwise — the exam point is no extremes and no whiplash.
• Treat pain and agitation before invasive procedures. A struggling, desaturating infant is a cerebral-hemodynamic event (section 11.3).
• Maintain platelets and coagulation within unit transfusion thresholds. A coagulopathic extremely preterm infant with fluctuating pressures is a bleed waiting to declare. Chapter 7 covers clotting pathways; the neurologic point is that you do not “watch” a wet coagulopathy through the first 72 hours.
• Give vitamin K after birth as indicated. Do not delay intramuscular vitamin K for a later family discussion when the infant is already in the NICU.

Prophylactic indomethacin is used in some centers to reduce severe IVH. It is a unit-protocol decision, not a universal mandate. Know that it exists and that it never replaces hemodynamic gentleness. Ibuprofen or acetaminophen for later patent ductus arteriosus treatment is a different question.

Posthemorrhagic Hydrocephalus

After a large IVH, blood products inflame ependyma and impair cerebrospinal fluid resorption. PHH is progressive ventricular enlargement with rising intracranial pressure, not merely static ventriculomegaly after a grade III bleed.

Watch serial occipitofrontal circumference, suture splay, fontanelle tension, apnea, bradycardia, feeding intolerance, and ultrasound indices (ventricular index, anterior-horn width, thalamo-occipital distance). Your unit will have measurement habits; trend beats a single number. Temporary cerebrospinal fluid diversion may include serial lumbar punctures in selected communicating patterns, a ventricular reservoir, or a ventriculosubgaleal shunt. A permanent ventriculoperitoneal shunt waits until the infant is large enough and the fluid is clearer. Nursing priorities are infection surveillance, skin integrity over devices, positioning that does not kink tubing, and family teaching that PHH is a weeks-long course, not a one-time ultrasound finding.

Congenital hydrocephalus and shunt failure after neonatal neurosurgery sit with congenital neurology in chapter 10. The mechanism here is acquired and post-bleed.

Extra-Axial and Scalp Collections

Term and late-preterm infants present with extracranial collections that look similar until you map the anatomic plane. Birth-trauma mechanisms overlap chapter 15; the hemorrhage-specific job in this chapter is location, volume risk, and coagulopathy.

Subgaleal hemorrhage is a resuscitation diagnosis. Measure serial occipitofrontal circumference, watch heart rate and perfusion, repeat hematocrit, and prepare packed red cells, plasma, and restoration of circulating volume. Check PT/PTT, fibrinogen, and platelets. Notify neurosurgery early even though many cases are managed medically. Do not reassure a team that “it is just caput” when the scalp is ballotable, the ears are displaced, and the infant is mottled. Vacuum extraction, coagulopathy, and failed vitamin K prophylaxis all raise the pretest probability.

Vitamin K and Coagulopathy

Vitamin K deficiency bleeding (VKDB) still causes devastating intracranial hemorrhage in infants who did not receive prophylaxis, including late-onset disease in the first months of life among exclusively breastfed infants without supplementation. Early VKDB appears in the first 24 hours when maternal medications interfere with vitamin K. Classic VKDB is days 1–7. Late VKDB is roughly week 2 to month 6 and has a high rate of intracranial bleeding.

NICU coagulopathy is broader: disseminated intravascular coagulation in sepsis, consumptive thrombocytopenia, liver failure, and rare factor deficiencies. Hemophilia may present with intracranial bleeding after vacuum extraction or even after a so-called normal birth. Chapter 7 owns the clotting cascade. The neurologic point is this: a term infant with an unexplained intracranial hemorrhage needs a coagulation panel before you close the case as isolated birth trauma, and vitamin K is given, not withheld, while you wait for results if prophylaxis was omitted.

Worked Scenario and Exam Traps

A 25-week infant on day of life 1 receives a rapid 20 mL/kg saline bolus for a mean blood pressure below a gestational-age rule, is bagged to a PaCO2 of 25 mm Hg after a difficult intubation, then drops hematocrit from 42% to 28% with a tense fontanelle. The sequence is a textbook IVH pathway: pressure-passive flow, a hypocarbic swing, and a venous-pressure spike from volume. The next ultrasound is likely to show more than a grade I matrix bleed. Prevention would have been slower blood-pressure titration (inotropes or smaller aliquots per unit protocol), carbon dioxide in a mid-range target, and a premedication plan that treated pain and avoided a prolonged struggling attempt.

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