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Infantile hydrocephalus and the slit ventricle syndrome in early infancy
1Department of Neurosurgery, National Kagawa Children's Hospital, Japan.
Insights
Slit ventricle syndrome, a complication of hydrocephalus shunting, can occur in infants shortly after surgery. This severe condition, linked to low intracranial pressure, is most common in infants under one month old.
Area of Science:
- Pediatric Neurosurgery
- Neurology
- Medical Complications
Background:
- Shunt placement is a common treatment for hydrocephalus.
- Slit ventricle syndrome is a known, typically chronic, complication of shunting.
- Historically, this syndrome has not been reported in infants under one year of age.
Observation:
- This study presents infantile cases of severe slit ventricle syndrome occurring shortly after shunt procedures.
- The condition was observed to cause rapid coma and respiratory arrest.
- Infants shunted before one month of age showed the highest incidence (85.7%).
Findings:
- The causative factor is hypothesized to be extremely low intracranial pressure from double or multiple shunt placements.
- Infantile hydrocephalus exhibits high intracranial compliance, softer brains, and wider sutures, predisposing to this syndrome.
- Younger infants experienced shorter initial shunt function periods, potentially leading to malfunction and slit ventricle development.
Implications:
- Early diagnosis and intervention are crucial for managing this acute complication in infants.
- Treatment strategies include subtemporal decompression, antisiphon devices, and higher pressure valves.
- Understanding infantile hydrocephalus characteristics is key to preventing and treating shunt-related complications.
Abstract:
Slit ventricle syndrome is well known as a complication in the treatment of hydrocephalus by shunting. It is generally considered to be a chronic (but not acute) complication, occurring years after the shunt procedure; there has been no report of this syndrome occurring before 1 year of age. The authors present infantile cases that developed a severe form of this syndrome shortly after shunt procedures and discuss the pathophysiology in comparison to experience with older cases. The causative factor was thought to be extremely low intracranial pressure with resultant microcephalus created by double or multiple shunt placement. The condition resulted in rapid onset of coma and respiratory arrest, which was successfully treated by subtemporal decompression or placement of an antisiphon device, with insertion of a higher pressure valve. The specific characteristics of infantile hydrocephalus are analyzed in the light of this complication from a series of 58 treated infants. In a follow-up of over 1 year in 42 cases, analysis revealed that slit ventricle occurs most frequently in immature young infants shunted before 1 month of age (85.7% or 18/21 cases). In contrast, subdural hematoma after shunting is an extremely rare phenomenon in premature or mature neonates. Slit ventricles were thought to result from high intracranial compliance due to the softer brain and more markedly widened cranial sutures of infantile hydrocephalus in the younger age group. The functioning period of the initial shunt was also much shorter in younger infants, and this may be because the ventricular shrinkage to a slit can cause shunt malfunction with or without developing the slit ventricle syndrome.(ABSTRACT TRUNCATED AT 250 WORDS)