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Programming jammed Codman Hakim programmable valves: study of an explanted valve and successful programming in a
Sui-To Wong1, Eleanor Wen, Dawson Fong
1Department of Neurosurgery, Tuen Mun Hospital, Tuen Mun, Hong Kong.
Journal of Neurosurgery. Pediatrics
|May 28, 2013
Summary
A novel technique using Strata II and neodymium magnets can reprogram jammed Codman Hakim programmable valves, potentially avoiding shunt revision surgery for hydrocephalus patients.
Area of Science:
- Neurosurgery
- Biomedical Engineering
- Medical Devices
Background:
- Codman Hakim programmable valves can malfunction due to component jamming, often requiring surgical shunt revision.
- Hydrocephalus management frequently involves programmable valves, making their reliable function critical.
Observation:
- A jammed Codman Hakim valve explanted from a pediatric patient resisted standard programming.
- Laboratory analysis revealed that a Strata II magnet could rotate the valve's spiral cam.
- The magnetic field strength could be enhanced using neodymium magnets.
Findings:
- A specific method involving rotating a Strata II magnet (and neodymium magnets) successfully reprogrammed the jammed valve.
- The technique involves precise magnet placement and rotation (90° increments).
- This magnetic reprogramming approach was successfully applied to a patient with a jammed valve.
Implications:
- This magnetic reprogramming technique offers a potential alternative to shunt revision for jammed Codman Hakim valves.
- It may reduce surgical risks and healthcare costs associated with shunt revision.
- Further clinical and radiological follow-up is recommended to validate long-term efficacy.
