Surgery – Means for introducing or removing material from body for... – Material introduced into and removed from body through...
Patent
1993-04-28
1994-12-20
Lewis, Ralph A.
Surgery
Means for introducing or removing material from body for...
Material introduced into and removed from body through...
604281, A61M 2500
Patent
active
053742451
ABSTRACT:
A method of making a multiple-lumen catheter using a co-extrusion die comprises the step of forming an elongated cylindrical tube made of silicone and having an internal septum extending along the length thereof to form at least a pair of longitudinal lumens. While the elongated cylindrical tube is being formed, a nylon reinforcing strip is arranged inside the tube such that the strip extends along the length of the tube. The tube is solidified and cut into individual multiple-lumen catheters. The nylon strip includes a pair of orthogonal side plates which aid in anchoring the nylon strip within the solidified tube.
An apparatus for making the multiple-lumen catheter comprises a co-extrusion die, a silicon extruder for injecting silicone into the die, and a pair of rollers for feeding a nylon strip into the die. The co-extrusion die has a circular opening containing a pair of mandrels extending within the die for a predetermined length, the mandrels being arranged substantially parallel to each other with a gap therebetween. The rollers feed the nylon strip into the gap between the mandrels while the extruder is injecting the silicone into the die.
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