BioGlide® Hydrophilic Surface Modification

Silicone elastomer has been used in the making of shunts and catheters for decades and is the favored material of surgeons due to its biocompatibility and chemical stability. However, due to its low surface energy, silicone is hydrophobic and repels fluid. Add to this the limitations in molding technology that cannot prevent microscopic surface cracks and crevices and you have a substance that is good, but could be better.

Enter BioGlide, a patented technique which involves grafting, not coating, a hydrophilic, lubricious hydrogel onto the silicone surface. This grafting results in improved surface topography, rendering it smooth and lubricious. Also, when properly hydrated before insertion, the surface of the device with the BioGlide advantage forms a water shield that acts as a buffer to minimize tissue trauma during insertion.

Atomic Force Microscopy Photography. BioGlide modified silicone surface (below left) vs. unmodified silicone surface
(below right).

The development of BioGlide illustrates Medtronic Neurosurgery employees’ ongoing pursuit of technology to improve human welfare via the alleviation of pain, restoration of health, and extension of life.