Kink-free spiral-wound catheter
First Claim
Patent Images
1. A catheter section comprising:
- an elongate tubular member having a proximal end and a distal end and a passageway defining an inner lumen extending between those ends,said elongate tubular member comprising an inner tubular liner of a first liner material in coaxial relationship with an outer tubular cover comprising a first cover material, and at least a first ribbon stiffener having a handedness and spirally and coaxially wound exterior to said inner tubular liner and covered by said outer tubular cover, and the catheter section, in the region of the distal end, has a critical bend diameter of no more than 3.5 mm and a lateral flexibility of greater than 6500°
/in-lb.
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Abstract
This invention is a surgical device. In particular, it is a catheter suitable for treating a tissue target within the body, which target is accessible through the vascular system. Central to the invention is the use of stiffener ribbons, typically metallic, wound within the catheter body in such a way as to create a catheter having controllable stiffness.
370 Citations
55 Claims
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1. A catheter section comprising:
an elongate tubular member having a proximal end and a distal end and a passageway defining an inner lumen extending between those ends, said elongate tubular member comprising an inner tubular liner of a first liner material in coaxial relationship with an outer tubular cover comprising a first cover material, and at least a first ribbon stiffener having a handedness and spirally and coaxially wound exterior to said inner tubular liner and covered by said outer tubular cover, and the catheter section, in the region of the distal end, has a critical bend diameter of no more than 3.5 mm and a lateral flexibility of greater than 6500°
/in-lb.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A catheter comprising:
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an elongate tubular member having a proximal end and a distal end and a passageway defining an inner lumen extending between those ends, said elongate tubular member having; a.) a relatively stiff proximal segment, and b.) a relatively flexible distal segment, said distal segment being composed of an inner distal tubular liner comprising a distal liner material in coaxial relationship with an outer distal tubular cover comprising a distal cover material, and at least a first ribbon stiffener having a first handedness and spirally and coaxially wound upon said inner distal tubular liner and covered by said outer distal tubular cover, and the catheter, in the region of the distal end, has a critical bend diameter of no more than 3.5 mm and a lateral flexibility of greater than 6500°
/in-lb. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A catheter comprising:
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an elongate tubular member having a proximal end and a distal end and a passageway defining an inner lumen extending between those ends, said elongate tubular member having; a.) a relatively stiff proximal segment, said proximal segment composed of an inner proximal tubular liner comprising a proximal liner material in coaxial relationship with an outer proximal tubular cover comprising a proximal cover material, a first ribbon stiffener having a handedness and spirally and coaxially wound upon said inner proximal tubular liner covered by said outer proximal tubular cover and b.) a relatively flexible distal segment, said distal segment being composed of an inner distal tubular liner comprising a distal liner material in coaxial relationship with an outer distal tubular cover comprising a distal cover material, and said first ribbon stiffener spirally and coaxially wound upon said inner distal tubular liner and covered by said outer distal tubular cover, and the catheter, in the region of the distal end, has a critical bend diameter of no more than 3.5 mm and a lateral flexibility of greater than 6500°
/in-lb. and the second ribbon stiffener is spirally and coaxially wound about said first ribbon stiffener, andc.) at least one intermediate segment defining a passageway between the relatively stiff proximal segment and the relatively flexible distal segment, said at least one intermediate segment being composed of an extension of the inner proximal tubular liner in coaxial relationship with an extension of the outer distal tubular cover, and said first ribbon stiffener spirally and coaxially wound between said inner proximal tubular liner and said outer distal tubular cover and the second ribbon stiffener is spirally and coaxially wound about said first ribbon stiffener. - View Dependent Claims (42, 43, 44, 45)
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46. A catheter section comprising:
an elongate tubular member having a proximal end and a distal end and a passageway defining an inner lumen extending between those ends, said elongate tubular member comprising an outer tubular liner in coaxial relationship with at least a first ribbon stiffener having a handedness and spirally and coaxially wound and covered by said outer tubular cover, and the catheter section, in the region of the distal end, has a critical bend diameter of no more than 3.5 mm and a lateral flexibility of greater than 6500°
/in-lb.- View Dependent Claims (47, 48, 49, 50, 51, 52, 53, 54, 55)
Specification