Strain Gauge Integrated Magnetic Microactuator for Smart Self-Clearing Catheter

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Hydrocephalus is a neurological disease characterized by an excessive accumulation of cerebral spinal fluid (CSF) in the ventricles of the brain. Treatment requires the implantation of shunts through which CSF can be drained from the brain. However, the failure rate of these systems remain high, especially among children. According to the Journal of Neurosurgery, a study conducted from April 2008 to December 2011 reported that 33% out of 1036 patients experienced shunt failure. Common causes of failure include obstruction, over-drainage, and loculated ventricles.

Researchers at Purdue University have developed an implantable catheter capable of obstruction detection and removal, device alignment, and flow rate measurement. Previously, Purdue researchers introduced a fully integrated self-clearing implantable catheter that was able to clear obstructions, but found that once the device was implanted it was impossible to determine whether the device was oriented properly or actuating as expected. With new additions, in real-time the catheter can detect obstructions, confirm device alignment, and measure the CSF flow-rate on top of the existing biofouling-removal capabilities of the microactuator in the catheter. This device has demonstrated the ability to solve one of the largest challenges that clinicians encounter with chronically implanted catheters.

-Obstruction Detection
-Device Alignment
-Flow Rate Measurement
-Ease of Fabrication

Potential Applications:
-Hydrocephalus Treatment
Nov 20, 2019
Utility Patent
United States

Nov 20, 2018
United States
Purdue Office of Technology Commercialization
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