Catheter with flaring tip

Patent metadata

Field	Value
Publication number	US-12036373-B2
Application number	US-201917055721-A
Country	US
Kind code	B2
Filing date	May 17, 2019
Priority date	May 18, 2018
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

In the present disclosure, embodiments include flaring tip microcatheters, methods of deploying flaring tip microcatheters, and embolization treatment methods. The flaring tip microcatheter may include a hollow shaft having a shaft lumen defined therein, a core disposed within the shaft lumen, and a tip including at least two petals affixed to a distal end of the core, the at least two petals including at least two wires wherein the core is hollow and defines a core lumen. The at least two wires may be configured to pull the at least two petals to form a flared configuration of the tip. The flared configuration of the tip may allow for laminar flow of a therapeutic agent distally from the tip.

First claim

The invention claimed is:

1. A flaring tip microcatheter, the microcatheter comprising:
a hollow shaft having a shaft lumen defined therein;
a core disposed within the shaft lumen, wherein the core is hollow and defines a core lumen;
a tip comprising at least two petals affixed to a distal end of the core, the at least two petals comprising at least two wires;
wherein:
the at least two wires are configured to pull the at least two petals to form a flared configuration of the tip with a distal flared opening of the tip larger than a proximal diameter of the tip; and
the flared configuration of the tip allows for laminar flow of a therapeutic agent distally from the tip.

2. The microcatheter of claim 1 , wherein the at least two wires are disposed between the core and the shaft within the shaft lumen.

3. The microcatheter of claim 1 , wherein each petal of the at least two petals comprises one wire.

4. The microcatheter of claim 1 , further comprising a slide, wherein the at least two wires are affixed to the slide, and wherein the slide is configured to pull the at least two wires.

5. The microcatheter of claim 4 , wherein the slide is configured to flare the at least two petals when the at least two wires are pulled.

6. The microcatheter of claim 1 , wherein the at least two petals overlap at a seam.

7. The microcatheter of claim 1 , wherein the at least two wires extend straight along a longitudinal axis of the microcatheter.

8. The microcatheter of claim 1 , wherein the at least two wires intertwine around the core in a braided manner along the longitudinal axis of the microcatheter.

9. The microcatheter of claim 1 , comprising at least four petals.

10. The microcatheter of claim 1 , wherein the tip is a radiopaque tip.

11. The microcatheter of claim 1 , wherein the at least two petals are in a row, further comprising one or more additional rows of petals.

Assignees

• Bard Peripheral Vascular Inc

Inventors

• Simmons Brandon David

Classifications

• A61M2205/33

  Controlling, regulating or measuring · CPC title

• A61M2205/073

  Syringe, piston type · CPC title

• A61M2205/051

  with radiation therapy · CPC title

• A61M5/31511

  Piston or piston-rod constructions, e.g. connection of piston with piston-rod (A61M5/5066 takes precedence) · CPC title

• A61M5/315

  Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod {or piston}; Appliances on the rod for facilitating dosing {; Dosing mechanisms} · CPC title