Process for producing steerable sheath catheters
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United States of America Patent
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Jun 24, 2003
Grant Date -
Dec 6, 2001
app pub date -
Apr 12, 2001
filing date -
Apr 24, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
The invention is a method for manufacturing a steerable catheter having a distal end, proximal end, an outer jacket, a pull wire and a central lumen. The central lumen is maintained in a circular shape without bulges diminishing the useful inter-diameter by using an outer jacket with an elliptical shape and uneven thickness to encase a pull wire. The pull wire friction is also reduced by using one wire of larger diameter to create the lumen for the pull wire of smaller diameter, thus reducing the friction on the pull wire and reducing the locking of the catheter body around the pull wire at bends preventing movement of the pull wire. The distal end of the catheter also has a smooth tip due to heat treating of steel wire braid reinforcement that does not require the addition of bulge forming additional material to control tip shape.
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