Catheter tube

Patent metadata

Field	Value
Publication number	US-2019240456-A1
Application number	US-201716328772-A
Country	US
Kind code	A1
Filing date	Aug 30, 2017
Priority date	Aug 31, 2016
Publication date	Aug 8, 2019
Grant date	—

Abstract

A catheter that has a catheter tube everting inside-out during the process of catheterization. The catheter tube has a plurality of longitudinal protrusions extending from the first end of the catheter tube through at least a portion of the catheter tube, and forming an angle of 0 degrees to 45 degrees with respect to the longitudinal axis of the catheter tube and facing radially inwards, and provides for dilating a circumference of the catheter tube upon everting the catheter tube inside-out from the first end of the catheter tube.

First claim

1 . A catheter tube ( 10 ) comprising
a first open end ( 11 ) and a second open end ( 12 ), a plurality of longitudinal protrusions ( 14 ), the plurality of longitudinal protrusions ( 14 ) extending from the first end ( 11 ) of the catheter tube ( 10 ) through at least a portion of the catheter tube ( 10 ), and forming an angle of 0 degrees to 45 degrees with respect to the longitudinal axis of the catheter tube ( 10 ) and facing radially inwards, and means for dilating a circumference of the catheter tube ( 10 ) upon everting the catheter tube ( 10 ) inside-out from the first end ( 11 ) of the catheter tube ( 10 ).

2 . The catheter tube ( 10 ) according to claim 1 , wherein the means for dilating the circumference of the catheter tube ( 10 ) comprise a layer of flexible material ( 13 ), wherein the layer of flexible material ( 13 ) forms a primary outer surface ( 16 ) of the catheter tube ( 10 ), and the longitudinal protrusions ( 14 ) are disposed on the layer of flexible material ( 13 ).

3 . The catheter tube ( 10 ) according to claim 1 , wherein the longitudinal protrusions ( 14 ) are unevenly distributed on the circumference of the catheter tube ( 10 ).

4 . The catheter tube ( 10 ) according to claim 1 , wherein the means for dilating the circumference of the catheter tube ( 10 ) comprise one or more dilatable protrusions ( 34 ).

5 . The catheter tube ( 10 ) according to claim 4 , wherein the longitudinal protrusions ( 14 ) and the dilatable protrusions ( 34 ) are distributed evenly on the circumference of the catheter tube ( 10 ), each dilatable protrusion ( 34 ) being positioned between two adjacent longitudinal protrusions ( 14 ).

6 . The catheter tube ( 10 ) according to claim 1 , wherein the longitudinal protrusions ( 14 ) form an inclination angle of 5-10 degrees with respect to the longitudinal axis of the catheter tube ( 10 ), said longitudinal protrusions ( 14 ) forming a spiral structure.

7 . The catheter tube ( 10 ) according to claim 1 , wherein the catheter tube ( 10 ) further comprises a lubrication coating on the primary outer surface ( 16 ) of the catheter tube ( 10 ).

8 . The catheter tube ( 10 ) according to claim 1 , wherein the catheter tube ( 10 ) further comprises tips ( 20 ) on the primary outer surface ( 16 ) of the catheter tube ( 10 ).

9 . The catheter tube ( 10 ) according to claim 1 , wherein the catheter tube ( 10 ) is tapered towards the second end ( 12 ) of the catheter tube ( 12 ).

10 . The catheter tube ( 10 ) according to claim 1 , wherein the catheter tube ( 10 ) comprises a pre-folded everted region ( 6 ) at the first end ( 11 ) of the catheter tube ( 10 ).

11 . The catheter tube ( 10 ) according to claim 1 , wherein the catheter tube ( 10 ) further comprises at least one of the additional components, the additional components being
a guard ( 7 ), the guard ( 7 ) being located on the everted region ( 6 ) at the first end ( 11 ) of the catheter tube ( 10 ), a gripper ( 8 ), the gripper ( 8 ) being positioned on the catheter tube ( 10 ) and movable between the everted first end ( 11 ) and the second end ( 12 ) of the tube ( 10 ), and a connector ( 9 ), the connector ( 9 ) being disposed at the second end ( 12 ) of the catheter tube ( 10 ).

12 . The catheter tube ( 10 ) according to claim 11 , wherein, when the catheter tube ( 10 ) comprises both the guard ( 7 ) and the gripper ( 8 ), the guard ( 7 ) and the gripper ( 8 ) are connected or integrally formed and form a guiding channel.

13 . The catheter tube ( 10 ) according to claim 1 , wherein at least movable contact joints ( 18 ) of the longitudinal protrusions ( 14 , 34 ) are made of a material being capable of modifying its structure, preferably upon increased tension or temperature.

14 . A method of manufacture of the catheter tube ( 10 ) of claim 1 comprising the steps of
manufacturing a catheter tube ( 10 ) with longitudinal protrusions ( 14 ) facing radially outwards, and
everting the catheter tube ( 10 ) inside-out to a position where the longitudinal protrusions ( 14 ) face radially inwards,
preferably, the step of manufacturing of the catheter tube ( 10 ) being performed by extrusion, injection molding or 3D print.

15 . A method of manufacture of the catheter tube ( 10 ) of claim 1 comprising the step of manufacturing the catheter tube ( 10 ) with longitudinal protrusions ( 14 ) facing radially inwards, preferably by extrusion, injection molding or 3D print.

16 . The method of manufacture of the catheter tube ( 10 ) according to claim 14 , wherein the step of manufacturing the catheter tube ( 10 ) is carried out by dip molding or vacuum forming.

17 . The method of manufacture of the catheter tube ( 10 ) according to claim 15 , wherein the longitudinal protrusions ( 14 , 34 ) are pre-formed by means ( 114 , 134 ) for pre-forming the longitudinal protrusions, preferably by cuts or perforations ( 114 , 134 ).

18 . The method of manufacture of the catheter tube ( 10 ) according to claim 17 , wherein the means ( 114 ) for pre-forming the longitudinal protrusions ( 14 ), preferably cuts or perforations ( 114 ), are provided discontinuously, over the whole thickness of the catheter tube ( 10 ), and arranged so that each perforation ( 114 ) is positioned between two non-perforated portions in the longitudinal and in the transversal direction, and wherein the method further comprises a step of providing the layer of flexible material ( 13 ) over the primary outer surface ( 16 ) of the catheter tube ( 10 ).

19 . The method of manufacture of the catheter tube ( 10 ) according to claim 14 , wherein the step of manufacturing the catheter tube ( 10 ) is provided by a multi-layer extrusion, providing both the longitudinal protrusions ( 14 ) and the layer of flexible material ( 13 ).

20 . The method of manufacture of the catheter tube ( 10 ) according to claim 14 , wherein the method further comprises a subsequent step of coating a primary outer surface ( 16 ) of the catheter tube ( 10 ) with a lubrication material.

21 . The method of manufacture of the catheter tube ( 10 ) according to claim 14 , the method further comprising at least one of the following subsequent steps:
everting a first end ( 11 ) of the catheter tube ( 10 ) inside out, creating an everted region ( 6 ) of the catheter tube ( 10 ), attaching a guard ( 7 ) to the everted region ( 6 ) of the catheter tube ( 10 ), attaching a gripper ( 8 ) to the catheter tube ( 10 ), and attaching a connector ( 9 ) to the second end ( 12 ) of the catheter tube ( 10 ).

Assignees

• Riocath Medical Devices A S
• Ustav Organicke Chemie A Biochemie Av Cr V V I

Inventors

• Pokorny Vit
• Svoboda Miroslav

Classifications

• A61M25/0119 Primary

  Eversible catheters · CPC title

• A61M25/0054

  with regions for increasing flexibility · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• B29C48/21

  the layers being joined at their surfaces · CPC title

• A61M2025/006

  having a special surface topography or special surface properties, e.g. roughened or knurled surface · CPC title