Intravenous therapy system for blood vessel access via a curved needle and curved catheter

Patent metadata

Field	Value
Publication number	US-12109374-B2
Application number	US-202016741931-A
Country	US
Kind code	B2
Filing date	Jan 14, 2020
Priority date	Jan 18, 2019
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

An intravenous therapy system may include a curved needle; and a curved catheter formed around the outside surface of the curved needle; wherein, upon insertion of a first length of the curved needle and curved catheter into a patient's body, a curvature angle of the curved needle and curved catheter causes the curved needle and curved catheter to intersect axially with a blood vessel in the patient's body.

First claim

The invention claimed is:

1. An intravenous therapy system, comprising:
a hub section, comprising a top and a bottom opposite the top, wherein the bottom is configured to be proximate skin of a patient when the intravenous therapy system is inserted into a blood vessel, wherein the top of the hub section comprises a tab extending in an upward direction;
a curved needle comprising a curve having a distal end of the curve spaced apart from a proximal end of the curve, wherein the proximal end of the curve is proximate a straight proximal end of the curved needle, wherein the curve is between 5 and 15 degrees with respect to the straight proximal end of the curved needle, wherein the curve is curved towards the upward direction; and
a curved catheter, wherein the curved needle extends through the curved catheter;
wherein, in response to insertion of a first length of the curved needle and a first length of the curved catheter into a patient's body, a curvature angle of the curved needle and the curved catheter causes the curved needle and the curved catheter to intersect axially with a blood vessel in the patient's body, wherein the curvature angle of the needle and the catheter is between 5 and 15 degrees.

2. The intravenous therapy system of claim 1 , wherein the first length of the curved needle is longer than the first length of the curved catheter.

3. The intravenous therapy system of claim 1 , the curved needle further comprising a bevel formed at a distal end of the curved needle, wherein an edge of the bevel is formed to face towards a center point of a curvature of the curved needle.

4. The intravenous therapy system of claim 1 , wherein in response to insertion of a second length of the curved needle and a second length of the curved catheter into a patient's body, the curved needle and the curved catheter are parallel with the blood vessel.

5. The intravenous therapy system of claim 1 , wherein the curved catheter is made of a polymer and thermoformed onto the curved needle.

6. The intravenous therapy system of claim 1 , wherein a curvature of the curved needle and a curvature of the curved catheter are created subsequent to a straight needle being formed around a straight catheter.

7. The intravenous therapy system of claim 1 , wherein in response to complete insertion of the curved needle and curved catheter, a bevel of the needle is prevented from being pressed against a wall of the blood vessel.

8. A method of manufacturing an intravenous device, comprising:
introducing a heated metal at an extrusion die, wherein the extrusion die comprises an internal spider die, wherein the internal spider die comprises a central shaft and a funnel portion, the central shaft defining an interior diameter of a hollow tube and the funnel portion defining an outer diameter of the hollow tube;
adjusting an exit plane of the internal spider die to be non-orthogonal to an extrusion axis of the spider die, wherein the central shaft and the funnel portion form the exit plane having a high side and a low side such that the exit plane is non-orthogonal to the extrusion axis aligned with the central shaft;
extruding the heated metal through the extrusion die forming the hollow tube therefrom, wherein when the heated metal is extruded through the extrusion die, the hollow tube that is formed curves away from the low side towards the high side to form a curve in the hollow tube, wherein the curve in the hollow tube is between 5 and 15 degrees;
and
forming a catheter over the hollow tube to form a curved catheter on the hollow tube, wherein a curvature angle of the catheter is between 5 and 15 degrees.

9. The method of claim 8 , wherein the metal is a stainless steel.

10. The method of claim 8 , further comprising applying a heat to the catheter to relax the catheter against the outer surface of the hollow tube.

11. The method of claim 8 , further comprising forming a bevel at a distal end of the hollow tube to form a sharp tip.

12. The method of claim 8 , further comprising adjust an exit plane of the internal spider die during extrusion from being non-orthogonal to the extrusion axis of the spider die to being orthogonal to the extrusion axis to form a straight portion of the hollow tube along a second distance of the total length of the hollow tube.

13. The method of claim 8 , further comprising annealing the hollow tube.

14. A method of manufacturing an intravenous device, comprising:
introducing a heated metal at an extrusion die, wherein the extrusion die comprises an internal spider die, wherein the internal spider die comprises a central shaft and a funnel portion, the central shaft defining an interior diameter of a hollow tube and the funnel portion defining an outer diameter of the hollow tube;
extruding the heated metal through the extrusion die forming the hollow tube therefrom, wherein the central shaft and the funnel portion form an exit plane that is orthogonal to an extrusion axis aligned with the central shaft, wherein when the heated metal is extruded through the extrusion die, the hollow tube that is formed is straight;
forming a plastic catheter around an outside of the hollow tube such that the plastic catheter is coaxial with the hollow tube that is straight; and
with a bend fixture, bending the hollow tube and the plastic catheter to form a curve in the hollow tube and the plastic catheter, wherein the curve in the hollow tube and the plastic catheter is between 5 and 15 degrees.

15. The method of claim 14 , wherein the metal is a stainless steel.

16. The method of claim 14 , further comprising applying a heat to the catheter to relax the catheter against the outer surface of the hollow tube.

17. The method of claim 14 , further comprising annealing the hollow tube.

18. The method of claim 14 , wherein an angle of the curve is between 1 and 10 degrees.

19. The method of claim 8 , wherein a spacing between the funnel and the central shaft is uniform.

20. The method of claim 14 , wherein a spacing between the funnel and the central shaft is uniform.

Assignees

• Becton Dickinson Co

Inventors

• Isaacson S Ray
• Weimer Marc
• Farinella Andrew C
• Burkholz Jonathan Karl

Classifications

• A61M25/001

  Forming the tip of a catheter, e.g. bevelling process, join or taper · CPC title

• C21D9/08

  for tubular bodies or pipes · CPC title

• B21C23/085

  Making tubes (B21C23/10 take precedence) · CPC title

• C21D6/004

  containing Cr and Ni · CPC title

• A61B5/150992

  Blood sampling from a fluid line external to a patient, such as a catheter line, combined with an infusion line; Blood sampling from indwelling needle sets, e.g. sealable ports, luer couplings or valves · CPC title