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Biodegradation of distal shunt catheters
K Elisevich1, A G Mattar, F Cheeseman
1Department of Clinical Neurological Sciences (Division of Neurosurgery), University of Western Ontario (Victoria Hospital), London, Canada.
Pediatric Neurosurgery
|January 1, 1994
Summary
Distal cerebrospinal fluid shunt catheters can degrade over time, leading to malfunction. Radionuclide shuntogram studies help identify this degradation in patients with hydrocephalus.
Area of Science:
- Neurosurgery
- Biomaterials Science
- Medical Imaging
Background:
- Cerebrospinal fluid (CSF) shunts are crucial for managing hydrocephalus.
- Distal catheter failure is a significant complication, particularly in pediatric and young adult populations.
- Long-term shunt function is essential for patient quality of life.
Observation:
- A review identified 7 cases of distal catheter malfunction due to material deterioration after over 7 years of implantation.
- These failures occurred in individuals within their first two decades of life, with symptom durations of 1 to 62 days.
- Degradation manifested as catheter wall attenuation and fracture, leading to diffuse leakage.
Findings:
- Radionuclide shuntogram studies revealed irregular catheter lumens and surrounding tissue radioactivity due to material degradation.
- Fractured or attenuated catheter walls caused localized leakage and distal flow obstruction.
- The biodegradability of distal shunt catheter materials contributes to long-term malfunction.
Implications:
- Material biodegradability should be considered in young patients with hydrocephalus and chronically implanted shunts.
- Radionuclide shuntogram is a valuable and convenient tool for diagnosing distal catheter failure.
- Understanding degradation mechanisms can inform the development of more durable shunt materials.