Catheter device comprising a separating device for retaining magnetic particles contained in a fluid and protection device for a functional element

Patent metadata

Field	Value
Publication number	US-2017368305-A1
Application number	US-201615545037-A
Country	US
Kind code	A1
Filing date	Jan 22, 2016
Priority date	Jan 22, 2015
Publication date	Dec 28, 2017
Grant date	—

Abstract

The invention relates to, amongst other things, a catheter device comprising a catheter ( 24 ) in which a rotating shaft ( 25 ) which is made at least partially from a magnetic material is arranged, and a separating device which contains an annular body ( 27 ) surrounding the rotating shaft and having a cavity containing a magnetic body ( 13′ ), the magnetic body being arranged downstream from a point at which the shaft ( 25 ) exits the catheter ( 24 ) which it surrounds with respect to the direction of flow of the fluid through the catheter.

First claim

1 . A catheter device with a catheter ( 24 ), in which a rotating shaft ( 25 ) consisting at least partly of a magnetic material is arranged, and with a separating device which comprises a ring body ( 27 ) with a cavity containing a magnet body ( 13 ′), the ring body surrounding the rotating shaft, wherein the magnet body with respect to the flow direction of the fluid through the catheter is arranged downstream of a location, at which the shaft ( 25 ) exits out of the catheter ( 24 ) surrounding it.

2 . A catheter device for holding back magnetic particles ( 15 , 16 ) which are located in a fluid, with a transport channel ( 1 , 1 ′), in which the fluid can be moved in a throughflow direction ( 4 , 5 , 6 ), and with a magnet device ( 13 , 13 ′, 13 ″, 14 , 18 , 19 , 20 ), wherein the magnet device comprises at least one magnet ( 13 , 13 ′, 13 ″) which is separated from the fluid by a magnetically permeable solid matter layer ( 14 ).

3 . A catheter device according to claim 2 , characterised in that the magnet interacts exclusively with magnetic or magnetisable particles in the fluid in the transport channel.

4 . A catheter device according to one of the preceding claims,
characterised by a first and a second fluid connection ( 11 , 12 ), between which the separating device forms a fluid-tight fluid channel.

5 . A catheter device according to one of the preceding claims,
characterised in that a magnet ( 13 , 13 ″) which is enveloped by a magnetically permeable solid matter layer ( 14 ) and around which fluid can flow is arranged in the fluid channel.

6 . A catheter device according to claim 5 ,
characterised in that the magnet ( 13 , 13 ″) is designed as a cylinder or cuboid, whose length in the longitudinal direction of the fluid channel is larger than its diameter, and which is arranged in a cylindrical section of the fluid channel.

7 . A catheter device according to claim 6 ,
characterised in that the magnetic field lines within the magnet ( 13 , 13 ″) run transversely, in particular perpendicularly to the flow direction of the fluid.

8 . A catheter device according to claim 5 ,
characterised in that the magnet ( 13 , 13 ′, 13 ″) in the throughflow direction has a smaller extension than perpendicularly to the throughflow direction.

9 . A catheter device according to one of the preceding claims,
characterised by a ring body ( 27 ) which surrounds the transport channel ( 1 ′), wherein the transport channel is configured for receiving a catheter ( 24 ) with a throughflow channel, and wherein a magnet ( 13 ′) is arranged in the ring body ( 27 ) in a cavity situated next to the transport channel.

10 . A catheter device according to claim 9 ,
characterised in that the ring body ( 27 ) is designed as one piece in the peripheral direction.

11 . A catheter device according to claim 9 ,
characterised in that the ring body ( 27 ) is interrupted at least once in the peripheral direction and in particular can be folded open for sticking onto a catheter ( 24 ).

12 . A catheter device according to claim 1 or one of the following,
characterised in that
the flow channel in the region of the magnet device ( 13 , 13 ′, 13 ″, 14 , 18 , 19 , 20 ) has a greater cross section than in a region which in the flow direction of the fluid is arranged upstream of the region of the magnet device.

13 . A catheter device according to one of the claims 1 to 12 , characterised in that this comprises at least one valve for the control of a fluid flow through the catheter, wherein the valve comprises: a valve control space, in which a feed channel runs out with a feed opening and a discharge channel runs out with a discharge opening, and a closure element which is movable in a controlled manner in the valve control space and which in at least one first position closes the discharge opening, in at least one second position closes the feed opening and in at least one third position holds open a connection channel between the feed opening and the discharge opening, wherein a valve drive is provided which moves the closure element selectively at least into the first, second or third position.

14 . A catheter device according to one of the preceding claims, characterised in that the transport channel ( 1 , 1 ′) comprises a reservoir for the intermediate storage of particles.

15 . A catheter device according to claim 14 , characterised in that the reservoir is magnetically influenced such that metallic particles remain in the reservoir even when the transport channel ( 1 , 1 ′) is subjected to throughflow.

16 . A catheter device according to one of the claim 14 or 15 , characterised in that the reservoir comprises two ends, wherein both are connected in a fluid-conducting manner to the transport channel ( 1 , 1 ′).

17 . A catheter device according to one of the claims 14 to 16 , characterised in that the reservoir is designed as a cross-sectional enlargement of the transport channel ( 1 , 1 ′) which is spatially delimited.

18 . A protective device for a functional element which is in connection with a flowing fluid, characterised in that a separating device for holding back particles located in the fluid and with at least one magnet element is provided along a flow channel for the fluid, in particular a catheter, in a manner distanced to the functional element and in particular separated from this.

19 . A protective device according to claim 18 , characterised in that the functional element is a seal and/or bearing, in particular a ball bearing or plain bearing.

Assignees

• Ecp Entw Mbh

Inventors

• Er Sami
• Simon Cornelia
• Schumacher Joerg
• Liebing Reiner

Classifications

• A61M2039/224

  of the slide-valve type · CPC title

• A61M2205/7545

  for solid matter, e.g. microaggregates · CPC title

• A61M2039/226

  Spindles or actuating means · CPC title

• A61M39/223

  Multiway valves · CPC title

• A61M2205/0272

  Electro-active or magneto-active materials · CPC title