Infusion catheter with composite tip
First Claim
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1. An implantable catheter for delivering a therapeutic agent to a body, the catheter comprising:
- an elongate tubular core comprising a first material, the core having a proximal end and a distal end;
an elongate tubular tip comprising a second material different that the first material, the tip having a bending stiffness greater than a bending stiffness of the core, wherein a proximal end of the tip is positioned to abut or be near the distal end of the core such that a continuous lumen extends from the proximal end of the core to a distal end of the tip, the tip defining a cylindrical outer surface of uniform diameter extending between the proximal and distal ends of the tip; and
an elastomeric jacket having a radial compliance greater than a radial compliance of the core, the elastomeric jacket surrounding and fixedly secured to longitudinal portions of both the tip and the core, wherein the distal end of the tip protrudes beyond a distal end of the elastomeric jacket, and wherein the elastomeric jacket has an outer diameter that is three or more times larger than an outer diameter of the core.
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Abstract
A catheter for use with a medical infusion or other fluid system. The catheter may include a flexible elongate tubular core that is resistant to radial collapse, and a separate tubular tip member forming the catheter distal tip. The catheter may further include a flexible, e.g., elastomeric, jacket that surrounds at least a portion of the tubular core. The jacket may have a radial compliance that is greater than that of the tubular core. The jacket may further define an outer diameter that is about 4 to about 6 times greater than an outer diameter of the core.
104 Citations
18 Claims
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1. An implantable catheter for delivering a therapeutic agent to a body, the catheter comprising:
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an elongate tubular core comprising a first material, the core having a proximal end and a distal end; an elongate tubular tip comprising a second material different that the first material, the tip having a bending stiffness greater than a bending stiffness of the core, wherein a proximal end of the tip is positioned to abut or be near the distal end of the core such that a continuous lumen extends from the proximal end of the core to a distal end of the tip, the tip defining a cylindrical outer surface of uniform diameter extending between the proximal and distal ends of the tip; and an elastomeric jacket having a radial compliance greater than a radial compliance of the core, the elastomeric jacket surrounding and fixedly secured to longitudinal portions of both the tip and the core, wherein the distal end of the tip protrudes beyond a distal end of the elastomeric jacket, and wherein the elastomeric jacket has an outer diameter that is three or more times larger than an outer diameter of the core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An implantable catheter for delivering a therapeutic agent to a body, the catheter comprising:
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an elongate tubular core comprising a first material, the core having a proximal end and a distal end; an elongate tubular tip comprising a second material different that the first material, the tip having a bending stiffness greater than a bending stiffness of the core, the tip also having a distal end and a proximal end, wherein the proximal end of the tip is positioned to abut or be near the distal end of the core such that a continuous lumen extends from the proximal end of the core to the distal end of the tip, the tip defining a cylindrical outer surface of uniform diameter extending between the proximal and distal ends of the tip; and an elastomeric jacket comprising;
a proximal end terminating at the proximal end of the core; and
a distal end terminating at a location between the proximal and distal ends of the tip, wherein the elastomeric jacket is fixedly secured to outer portions of both the tip and the core, and wherein the elastomeric jacket has an outer diameter that is three or more times larger than an outer diameter of the core. - View Dependent Claims (16, 17, 18)
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Specification