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Superselective embolization of spinal arteriovenous malformations using the Tracker catheter
H Touho1, J Karasawa, H Ohnishi
1Department of Neurosurgery, Osaka Neurological Institute, Japan.
Surgical Neurology
|August 1, 1992
Summary
Conventional embolization for spinal arteriovenous malformations showed high recanalization rates. A new minicatheter system improved outcomes but carried risks, necessitating careful technique for spinal vascular malformations.
Area of Science:
- Interventional Neuroradiology
- Vascular Surgery
- Neurology
Background:
- Spinal arteriovenous malformations (AVMs) present complex treatment challenges.
- Conventional embolization techniques have demonstrated limitations in long-term efficacy.
Observation:
- A retrospective review of 18 patients treated between 1985-1990 using conventional embolization revealed significant recanalization (71.4%) and new vessel formation (35.7%).
- Introduction of the Tracker vascular access system in 1990 offered a less invasive approach for embolizing spinal AVMs with smaller particles (150-350 microns).
Findings:
- Eight patients treated with the Tracker system showed a lower recanalization rate (50.0%) and new feeding vessel appearance (25%).
- Immediate neurological improvement was observed in 5/8 patients, though 3/8 with severe pre-existing paraparesis showed no change.
- Complications included transient neurological deterioration due to particle migration and one instance of subarachnoid hemorrhage from catheter perforation, highlighting the technical demands.
Implications:
- The Tracker system may offer improved durability compared to conventional embolization for spinal AVMs.
- Careful technique and understanding of spinal vascular anatomy are crucial to mitigate risks associated with microcatheter-based embolization.
- Further research is warranted to optimize minimally invasive treatment strategies for spinal vascular malformations.