Intraventricular haemorrhage and periventricular leukomalacia — formative SAQs

SAQ 1 — The preterm infant who suddenly deteriorates (20 marks, ~15 minutes)

A 26-week-gestation infant, birthweight 760 g, is intubated and ventilated for respiratory distress syndrome. Antenatal steroids were given. At 36 hours of life, after a witnessed pneumothorax that required drainage, the infant has a sudden fall in haemoglobin from 145 to 88 g/L, a metabolic acidosis, a fall in blood pressure, and three brief focal seizures. The anterior fontanelle is bulging. [1]

Questions

1. Give the most likely diagnosis and the immediate investigation that confirms it. (3 marks) [1]
2. Describe the immediate bedside management, including the haematological correction and the first-line antiseizure medication with its dose and route. (6 marks) [1]
3. Reproduce the Papile grading system and state which grade carries the highest risk of cerebral palsy and post-haemorrhagic hydrocephalus. (5 marks) [1]
4. Outline the cranial-ultrasound surveillance programme for very preterm infants and the monitoring required after any grade III–IV bleed. (6 marks) [9]

Model answer (must-hit)

1. The most likely diagnosis is a large intraventricular haemorrhage, precipitated by the cerebral blood-flow swing from the pneumothorax in an infant with a pressure-passive cerebral circulation. The confirming investigation is an urgent cranial ultrasound, which will show the echogenic bleed, grade it by the Papile system, and reveal any ventricular dilation or parenchymal extension. [1]
2. Immediate management follows ABC with haemodynamic gentleness: maintain the airway and ventilate gently (avoid further blood-pressure swings), drain the pneumothorax, correct the hypotension cautiously with volume or inotrope, and correct the anaemia with a packed-red-cell transfusion. Check and correct the coagulation and platelets. Treat the seizures with phenobarbital 20 mg/kg intravenously as first-line. The principle is minimal handling applied to the whole circulatory system — a rough resuscitation can extend the bleed. [1]
3. The Papile grades are: I, subependymal germinal-matrix haemorrhage; II, intraventricular haemorrhage filling under half the ventricle without dilation; III, intraventricular haemorrhage with acute ventricular dilation; IV, parenchymal venous infarction. The grade IV lesion carries the highest risk of cerebral palsy (roughly 50–70 percent, typically a hemiplegia contralateral to the lesion) and of post-haemorrhagic hydrocephalus. The grade IV lesion is a venous infarct from compression of the terminal veins by the distended ventricle, not simple extension of the bleed. [1]
4. The cranial-ultrasound surveillance programme for very preterm and very-low-birthweight infants is typically performed on day 1, day 3, day 7, and around day 28, plus any time of clinical deterioration — because about half of severe bleeds are clinically silent. After any grade III–IV bleed, serial head circumference measurement (plotted on a preterm chart) and serial ventricular-index measurement on ultrasound detect post-haemorrhagic ventricular dilation before it becomes clinically obvious; an accelerating head circumference and a rising ventricular index prompt escalation. [9]

SAQ 2 — Prevention, prognostic counselling and the DRIFT decision (20 marks, ~15 minutes)

You are asked to counsel the parents of an extremely preterm infant whose day-7 cranial ultrasound shows a grade III intraventricular haemorrhage with early ventricular dilation. The parents ask what could have been done to prevent the bleed, what the future holds, and whether anything can be done about the enlarging ventricles. [5]

Questions

1. Outline the evidence-based prevention strategies for IVH, naming the key trials for each. (6 marks) [2] [3] [4]
2. Explain the prognostic implications of a grade III IVH and of cystic versus non-cystic PVL, and how you would frame the counselling. (5 marks) [9]
3. Describe the management options for post-haemorrhagic ventricular dilation, including the DRIFT evidence and its equipoise. (6 marks) [6]
4. Explain why no drug reliably prevents the progression of post-haemorrhagic ventricular dilation to hydrocephalus. (3 marks) [6]

Model answer (must-hit)

1. The prevention strategies with trial evidence are: antenatal corticosteroids (given to the mother at 24–34 weeks, which accelerate fetal maturation and reduce IVH and RDS); delayed cord clamping at 30 to 60 seconds, confirmed by the Rabe 2019 Cochrane review to reduce IVH in preterm infants by allowing a placental transfusion that stabilises the transitional circulation; caffeine citrate for apnoea of prematurity, shown by the Schmidt 2006 Caffeine for Apnea of Prematurity (CAP) trial to improve survival without neurodevelopmental disability; and prophylactic indomethacin for the extremely preterm infant, established by the Ment 1994 multicentre trial to reduce severe IVH and PDA (though without a proven long-term neurodevelopmental benefit). Haemodynamic stability — gentle ventilation, avoiding pneumothoraces and rapid carbon-dioxide change, treating a PDA — is the mechanistic thread linking them all. [2] [3] [4]
2. A grade III IVH carries a moderate risk of cerebral palsy, cognitive impairment and post-haemorrhagic hydrocephalus — not a certainty, but a clear increase over an unaffected preterm infant. Cystic PVL is the strongest single ultrasound predictor of cerebral palsy (roughly 50–70 percent when cysts are extensive, typically a spastic diplegia); non-cystic, diffuse white-matter injury carries a more variable but still significant burden, best quantified by MRI at term-equivalent age. Counselling is framed as a calibrated, revisitable probability — not a verdict — because the lesion evolves and the individual outcome is uncertain; the family is supported through surveillance and early intervention as the picture clarifies. [9]
3. Post-haemorrhagic ventricular dilation is initially observed with serial ultrasound and head circumference. Intervention is considered when the ventricular index crosses the 97th centile plus 2 to 4 mm or when there are clinical signs of raised intracranial pressure. Options are serial lumbar puncture, a ventricular access device, the drainage-irrigation-fibrinolytic-therapy (DRIFT) technique, and ventriculoperitoneal shunt. The Whitelaw 2007 randomised trial showed DRIFT reduced shunt placement but raised the rate of secondary intracranial bleeding, and the Luyt 2020 ten-year follow-up confirmed a cognitive benefit in survivors but a continued mortality signal — so DRIFT is used in a small number of specialist centres, and most infants who progress receive a shunt once the cerebrospinal fluid clears. [6]
4. No drug reliably prevents the progression of post-haemorrhagic ventricular dilation to hydrocephalus. Acetazolamide and furosemide were studied and do not reduce shunt placement or improve outcome; the obstruction is mechanical (clot and protein-laden cerebrospinal fluid obstructing the arachnoid villi and aqueduct), so pharmacological reduction of cerebrospinal-fluid production cannot overcome it. Management is procedural — observation, drainage, or shunt — guided by the rate of progression. [6]