Catheter for reduced reflux in targeted tissue delivery of a therapeutic agent
First Claim
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1. A fluid delivery system comprising:
- a catheter having a proximal end and an opposite distal end, the catheter having a body with a lumen defined therein;
the body including a non-bulbous region having a substantially uniform outer diameter and a radially closed bulbous region, the bulbous region being made from an elastically deformable material;
while in a first state the bulbous region having a maximum outer diameter reduced relative to that while in a second state;
wherein the bulbous region of the body of the catheter is adapted to transition between the first and second states prior to introduction of the fluid via the lumen;
wherein the first state is a non-stressed state and the second state is a stressed state;
a radially tensioned deployment member disposed within the bulbous region of the lumen;
the radially tensioned deployment member being in a compressed state while the bulbous region is in the first state; and
the radially tensioned deployment member being in an expanded state while the bulbous region is in the second state.
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Abstract
A therapeutic agent delivery system that includes a catheter having a proximal end and an opposite distal end. The catheter has a body with a lumen defined therein. The body of the catheter includes a non-bulbous region having a substantially uniform outer diameter and a bulbous region made from an elastically deformable material. While in a first state the bulbous region has a maximum outer diameter greater than the substantially uniform outer diameter of the non-bulbous region; and while in a second state the maximum outer diameter of the bulbous region is reduced relative to that while in the first state.
43 Citations
23 Claims
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1. A fluid delivery system comprising:
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a catheter having a proximal end and an opposite distal end, the catheter having a body with a lumen defined therein;
the body including a non-bulbous region having a substantially uniform outer diameter and a radially closed bulbous region, the bulbous region being made from an elastically deformable material;
while in a first state the bulbous region having a maximum outer diameter reduced relative to that while in a second state;
wherein the bulbous region of the body of the catheter is adapted to transition between the first and second states prior to introduction of the fluid via the lumen;
wherein the first state is a non-stressed state and the second state is a stressed state;a radially tensioned deployment member disposed within the bulbous region of the lumen;
the radially tensioned deployment member being in a compressed state while the bulbous region is in the first state; and
the radially tensioned deployment member being in an expanded state while the bulbous region is in the second state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for using a fluid delivery system, the delivery system includes a catheter having a proximal end and an opposite distal end;
- the catheter having a body with a lumen defined therein, the body including a non-bulbous region haying a substantially uniform outer diameter and a radially closed bulbous region, the bulbous region being made from an elastically deformable material, comprising the steps of;
inserting a stylet into the lumen starting at the proximal end of the catheter and extending through at least the bulbous region; implanting the assembled stylet and catheter in a patient at a targeted site while the bulbous region is in a first state; and removing the assembled stylet from the catheter while the bulbous region of the catheter is maintained in a second state in which the maximum outer diameter of the bulbous region is greater than in the first state so as to reduce back flow;
wherein the first state is a non-stressed state and the second state is a stressed state;
during insertion the stylet pre-loads into the bulbous region of the lumen a radially tensioned deployment member;
the radially tensioned deployment member being in a compressed state while the bulbous region is in the first state; and
the radially tensioned deployment member being in an expanded state while the bulbous region is in the second state. - View Dependent Claims (15, 16, 19, 20, 21, 22, 23)
- the catheter having a body with a lumen defined therein, the body including a non-bulbous region haying a substantially uniform outer diameter and a radially closed bulbous region, the bulbous region being made from an elastically deformable material, comprising the steps of;
- 17. The method in accordance with claim l6, further comprising the step of securing via a releasable connector the stylet in place relative to the catheter while the bulbous region is m the non-stressed state.
Specification