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Age-related changes of cerebral ventricular size. Part II: Normalization of ventricular size following shunting
1Department of Surgery, Health Sciences Centre, University of Manitoba, Winnipeg, Canada.
Insights
Cerebrospinal fluid (CSF) shunting reduces hydrocephalic ventricular size, but age significantly impacts this reduction. Younger and elderly patients show minimal ventricular size changes post-shunting.
Area of Science:
- Neurosurgery
- Pediatric Neurology
- Radiology
Background:
- Hydrocephalus is a condition characterized by abnormal accumulation of cerebrospinal fluid (CSF) within the brain's ventricles.
- CSF shunting is a common surgical intervention to alleviate increased intracranial pressure in hydrocephalic patients.
- The effectiveness of CSF shunting in reducing ventricular size can vary among patient populations.
Purpose of the Study:
- To prospectively investigate the impact of cerebrospinal fluid (CSF) shunting on cerebral ventricular size in hydrocephalic patients.
- To determine if patient age influences the degree of ventricular size reduction following CSF shunting.
- To explore potential correlations between ventricular size reduction and pre-operative factors or clinical outcomes.
Main Methods:
- Prospective study involving 31 hydrocephalic patients.
- Computed tomographic (CT) scans performed before and one week after CSF shunting.
- Planimetric measurements to quantify cerebral ventricular size and assess reduction percentages.
Main Results:
- Significant differences in ventricular size reduction were observed based on age groups.
- Patients under two years and elderly patients exhibited minimal ventricular size reduction (8.5% and 9.7%, respectively).
- Older children and young adults demonstrated substantial ventricular size reduction (61.2%), independent of pre-operative size, disease duration, or clinical improvement.
Conclusions:
- Age is a critical factor influencing the degree of ventricular size reduction after CSF shunting in hydrocephalus.
- The elasticity of cerebral parenchyma, which varies with age, may play a role in ventricular size changes alongside CSF dynamics.
- Findings suggest that age-related differences in brain tissue properties contribute to the variable response to CSF shunting.
Abstract:
Thirty-one hydrocephalic patients were investigated prospectively by means of computed tomographic scan performed prior to and one week after cerebrospinal fluid (CSF) shunting. Planimetric measurements of the size of the cerebral ventricles were compared before and after shunting. Children under two years of age and elderly patients showed significantly less reduction of ventricular size (8.5 +/- 6.3% and 9.7 +/- 3.5% respectively) than older children and young adults (61.2 +/- 5.2%). The degree of reduction of ventricular size did not correlate with pre-operative size of ventricles, duration of disease, or clinical improvement. These findings suggest that reduction of ventricular size following CSF shunting is related to age. We postulate that the size of cerebral ventricles in hydrocephalic patients is not exclusively related to CSF dynamics, but also depends upon the intrinsic elastic properties of the cerebral parenchyma which vary with age.