Catheter construction begins with a solid core or mandrel upon which the catheter is built. Used to create or form the inside diameter (ID) during production, mandrels must provide consistent IDs and a smooth inner surface (lumen) for the finished catheter. Thus, choosing the right material with the right production process is crucial.
PTFE extruded monofilament is a primary foundational component used for mandrels in catheter construction. PTFE’s naturally smooth non-stick surface helps facilitate mandrel removal after construction of the finished catheter. Known for its high performing material properties, PTFE monofilament mandrels provide:
- High Lubricity For Easy Removal
- High Operating Temperature [500 °F (260 °C)]
- Moderately High Tensile Modulus
Glass-Filled PTFE Monofilament
For designs requiring a high PIC count of the braiding, mandrels need to have an increased tensile modulus. Glass particles can be compounded with PTFE resin prior to extrusion to enhance mechanical properties of the extruded monofilament (or thick-walled tube).
Zeus PTFE mandrels may be available with various secondary operations including tip forming and tapering.