Soft-tip performance braided catheter
First Claim
1. A catheter assembly comprising an elongate tubular member having a proximal end, a distal end, an axis, and a passageway defining an inner lumen extending between those ends, comprisinga.) a relatively less flexible and proximal segment, comprisingi.) a proximal braid member having a proximal end and a distal end, woven of a plurality of proximal braid elements, and having inner and outer surfaces,ii.) at least one lining member comprising a polymer located interior to said more proximal braid member, andiii.) at least one covering member comprising a polymer located exterior to said proximal braid member, andb.) a relatively more flexible distal tubular segment comprising:
- i.) a distal braid member, having a proximal end and a distal end, woven of a plurality of distal braid elements, said distal braid elements being less than in number than said proximal braid elements, and having inner and outer surfaces,ii.) at least one lining member comprising a polymer located interior to said distal braid member, andiii.) at least one covering member comprising a polymer located exterior to said distal braid member.
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Accused Products
Abstract
This is a catheter assembly which may be used in accessing a tissue target within the body, typically a target which is accessible through the vascular system. Central to the invention is the use of a braided metallic reinforcing member, typically of a stainless steel or super-elastic alloy ribbon, situated within the catheter body in such a way to create a catheter section having a thin wall, controlled stiffness, and high resistance to kinking. The distal-most section of the catheter is much more flexible than are other braided catheters of the genre due to choice of braid construction features of that distal-most section. The distal-most braid, and optionally, intermediate braid components are constructed to be more flexible than the more proximal sections due to deletion of ribbons from the braid structure, change of ribbon material, and change of pitch. The various sections include braids which may have a consistent pitch or may vary in pitch along the axis of the catheter or catheter section. The braided ribbon reinforcing member typically is placed between a flexible outer tubing member and an inner tubing member to produce a catheter section which is very flexible but highly kink resistant. The more proximal sections of the catheter assembly are often substantially stiffer than the more distal sections also due to the presence of stiff polymeric tubing or composited materials in the stiffer section.
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Citations
21 Claims
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1. A catheter assembly comprising an elongate tubular member having a proximal end, a distal end, an axis, and a passageway defining an inner lumen extending between those ends, comprising
a.) a relatively less flexible and proximal segment, comprising i.) a proximal braid member having a proximal end and a distal end, woven of a plurality of proximal braid elements, and having inner and outer surfaces, ii.) at least one lining member comprising a polymer located interior to said more proximal braid member, and iii.) at least one covering member comprising a polymer located exterior to said proximal braid member, and b.) a relatively more flexible distal tubular segment comprising: -
i.) a distal braid member, having a proximal end and a distal end, woven of a plurality of distal braid elements, said distal braid elements being less than in number than said proximal braid elements, and having inner and outer surfaces, ii.) at least one lining member comprising a polymer located interior to said distal braid member, and iii.) at least one covering member comprising a polymer located exterior to said distal braid member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification