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Chiari malformation: CSF flow dynamics in the craniocervical junction and syrinx
D E Sakas1, S I Korfias, S C Wayte
1Department of Neurosurgery, University of Athens, Evangelismos General Hospital, Athens, Greece.
Acta Neurochirurgica
|October 18, 2005
Summary
Cerebrospinal fluid (CSF) flow is reduced in Chiari malformation (ChM). Craniocervical junction decompression (CCJD) improves CSF flow, and absent intrasyrigeal pulsatile motion predicts patient improvement.
Area of Science:
- Neurology
- Biomedical Engineering
- Fluid Dynamics
Background:
- Chiari malformation (ChM) is a condition affecting the brain and spinal cord.
- Craniocervical junction decompression (CCJD) is a surgical procedure for ChM.
- Cerebrospinal fluid (CSF) flow dynamics are altered in ChM.
Purpose of the Study:
- To measure CSF flow velocities in patients with ChM before and after CCJD.
- To assess the effectiveness of CCJD in restoring normal CSF flow.
- To correlate CSF flow changes with clinical outcomes.
Main Methods:
- Spatial Modulation of Magnetization (SPAMM) MRI technique used.
- CSF flow velocities measured in prepontine, anterior cervical, and posterior cervical subarachnoid spaces.
- Intrasyrigeal pulsatile CSF motion qualitatively assessed.
Main Results:
- Significantly lower CSF velocities in ChM patients compared to healthy controls.
- Post-CCJD, CSF velocities increased significantly, especially in the anterior cervical region.
- Absent intrasyrigeal pulsatile motion after CCJD was a sensitive predictor of clinical improvement.
Conclusions:
- CCJD can restore CSF flow in patients with ChM.
- Increased CSF flow, particularly in the anterior cervical region, correlates with improved symptoms.
- SPAMM is a valuable tool for assessing CCJD outcomes and understanding ChM pathophysiology.
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