Polyimides used to manufacture vascular catheters are limited to catheters used in small vessels in the neck, head and brain. The ability to produce small thin walled catheters with exceptional physical properties is the reason for using polyimide polymers.
The mechanical, thermal, chemical, radiation properties and tight tolerances of thermoset polyimide tubing are unmatched by any other material. Putnam Plastics resin has been tested and certified to pass Class VI biocompatibility testing. PTFE additives can be incorporated for reduced coefficient of friction. Polyimide tubing can be produced in a selection of colors.
Thermoset polyimide tubing is available single lumen configuration. One or more polyimide single lumen tubes may be incorporated into a multilumen thermoplastic extrusion as lumen lining. Diameters range from 0.006 inches to 0.090 inches (0.152 mm to 2.286 mm) with wall thicknesses ranging from 0.0002 inches to 0.010 inches (0.005 mm to 0.254 mm). Profile shapes with consistent wall thickness such as ellipses and rectangles are available.
Polyimide tubing can also be reinforced with stainless steel wires in coil and/or braid configurations. Coil reinforcement provides resistance to collapse and buckling, while braid reinforcement improves burst strength and torque transmission.