Multi lumen catheter

• US 10,064,575 B2
• Filed: 04/16/2014
• Issued: 09/04/2018
• Est. Priority Date: 04/17/2013
• Status: Active Grant

• Current Assignee: Fluisense APS
• Original Assignee: Fluisense APS
• Inventors: Velschow, Sten, Harboe, Henrik, Madsen, Martin Toft
• Primary Examiner(s): STIGELL, THEODORE J
• Application Number:
  US14/423,905
• Publication Number:
  US 20160022190A1
• Time in Patent Office: 1,602 Days
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150755 Blood sample preparation for further analysis, e.g. by separating blood components or by mixing
• CPC Class Codes: A61B 5/150992 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, valves tubing connectors and couplings A61M39/00
• CPC Class Codes: A61B 5/155 Devices specially adapted for continuous or multiple sampling, e.g. at predetermined intervals devices loaded with multiple lancets simultaneously A61B5/15146
• CPC Class Codes: A61M 2025/0073 Tip designed for influencing the flow or the flow velocity of the fluid, e.g. inserts for twisted or vortex flow general flow characteristics A61M2206/10
• CPC Class Codes: A61M 25/0009 Making of catheters or other medical or surgical tubes
• CPC Class Codes: A61M 25/0015 Making lateral openings in a catheter tube, e.g. holes, slits, ports, piercings of guidewire ports; Methods for processing the holes, e.g. smoothing the edges
• CPC Class Codes: A61M 25/0071 Multiple separate lumens multiple separate lumens throughout the catheter A61M25/0026

Abstract

A multi lumen catheter comprising a proximal end and distal end said catheter further comprising; a first lumen for a first fluid said first lumen having a first proximal opening and a first distal opening for receiving a fluid, second lumen for a second fluid said second lumen having a second proximal opening and a second distal opening for delivering a second fluid, a third lumen having a third proximal opening and a third distal opening, wherein the first distal opening is arranged with respect to the second distal opening so that when in use at least part of the first fluid which enters the first lumen through the first distal opening has passed across the second distal opening such that the first fluid which enters the first lumen comprise at least a part of the second fluid.

Claims

1. A multi-lumen catheter comprising a proximal end and distal end, the distal end for insertion, said catheter further comprising;

a first lumen for a first fluid, said first lumen having a first proximal opening and a first distal opening for receiving a fluid, wherein when in use, the first fluid flows from the first distal opening to the first proximal opening,

a second lumen for a second fluid, said second lumen having a second proximal opening and a second distal opening for delivering a second fluid, wherein when in use, the second fluid flows from the second proximal opening to the second distal opening,

a third lumen having a third proximal opening and a third distal opening for returning the first fluid to the distal end of the catheter, wherein the third distal opening is disposed closer towards the distal end of the catheter with respect to the first distal opening, and wherein when in use, the first fluid flows from the third proximal opening to the third distal opening so that the first fluid is returned at the distal end of the catheter,

wherein the first distal opening is disposed alongside the second distal opening such that when in use at least part of the first fluid which enters the first lumen through the first distal opening has passed across the second distal opening such that the first fluid which enters the first lumen comprises at least a part of the second fluid.

2. A multi-lumen catheter according to claim 1, wherein the first distal opening and the second distal opening connects to a common distal channel.

3. A multi-lumen catheter according to claim 1, wherein the first distal opening and the second distal opening are arranged in a distal surface of the catheter.

4. A multi-lumen catheter according to claim 1, wherein the second distal opening at least partly encircles the first distal opening.

5. A multi-lumen catheter according to claim 1, wherein a surface of the distal end is cut at least at one an angle with respect to the longitudinal direction of the catheter.

6. A method for attaching a multi-lumen catheter of claim 1 to a device, comprising the steps of:

cutting the proximal end of the catheter at an angle;

inserting a pliable core in each lumen;

heating the proximal end of the catheter to a temperature below the melting point of the catheter material;

pressing the proximal end to seal tightly around the cores;

molding a connector house around the proximal end and cores, and

removing the cores.

7. A method for providing a labelling agent to a fluid retrieved by a multi-lumen catheter, comprising the steps of:

providing the multi-lumen catheter of claim 1;

providing the second fluid through the second distal opening, the second fluid comprising a labelling agent;

withdrawing the first fluid mixed with at least part of the second fluid through the first distal opening.

8. A method according to claim 7, wherein the labelling agent is a marker for providing a normal in analysis of the first fluid.