Magnetic microactuators for MEMS-enabled ventricular catheters for hydrocephalus

Area of Science:

• Biomedical Engineering
• Medical Devices
• Nanotechnology

Background:

• Hydrocephalus treatment commonly involves cerebrospinal fluid (CSF) shunts.
• CSF shunts have a high failure rate (40% in the first year), often due to ventricular catheter obstruction.
• Existing shunt designs lack active mechanisms to prevent catheter occlusion.

Purpose of the Study:

• To design and fabricate a novel ventricular catheter utilizing micromachining and micro electro-mechanical systems (MEMS) technologies.
• To develop a catheter resistant to occlusion, thereby improving shunt reliability.
• To actively combat the cellular buildup that leads to catheter blockage.

Main Methods:

• Design and fabrication of magnetic microactuators using MEMS technology.
• Testing of microactuators to assess their force generation capabilities.
• Integration of microactuators into ventricular catheter prototypes.

Main Results:

• Fabricated magnetic microactuators successfully generated theoretical forces sufficient to dislodge adherent cellular layers.
• The microactuators demonstrated potential for actively clearing obstructions.
• The developed technology offers a pathway to significantly reduce shunt occlusion.

Conclusions:

• MEMS-based magnetic microactuators show promise for preventing ventricular catheter occlusion in CSF shunts.
• This innovative approach could lead to improved hydrocephalus treatment outcomes by enhancing shunt longevity.
• Further development and integration into clinical devices are warranted to address shunt failure.