The Evolution of Coatings for Endovascular Devices
Bob Hergenrother, Ph.D., Source: Medical Device & Diagnostic Industry (MDDI)
Manufacturers no longer have to choose between low-particulate and low-friction coatings.
Hydrophilic coatings are often used to improve access for delivery and placement of endovascular devices such as catheters. These coatings increase a device’s lubricity, which reduces the frictional forces between the device and other devices or the vascular tissue itself. Hydrophilic coatings were traditionally evaluated by measuring sliding force, such as coefficient of friction, and durability through repeated cycling. While those measures of lubricity and durability are still used, today coatings are subjected to a newer performance parameter: particulate generation.