CN110811919A

CN110811919A - Novel inferior vena cava filter

Info

Publication number: CN110811919A
Application number: CN201911234264.2A
Authority: CN
Inventors: 卢琛
Original assignee: Xi'an Qitai Coordinate Medical Technology Co Ltd
Current assignee: Xi'an Qitai Coordinate Medical Technology Co Ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-02-21

Abstract

The invention discloses a novel inferior vena cava filter, which comprises a recovery hook, a catcher, a guide rod, a filter wire, a telescopic ring and a sleeve, wherein the recovery hook is arranged at the top end of the catcher, the guide rod is connected with the catcher in a threaded connection mode, the telescopic ring is sleeved on the guide rod to enable the guide rod to be in butt joint with the catcher, the filter wire comprises the catcher filter wire and a branch pipe filter wire which are respectively connected with the catcher and a branch pipe, the torsion between the catcher filter wire and the branch pipe filter wire is 0-50 degrees, and the catcher, the filter wire and the sleeve are respectively connected with the guide rod in a welding mode. The invention can prevent capture instability or falling off, realizes filter contraction, enables the guide rod to be accurately butted with the connecting capture device, has simple structure and convenient use, reduces operation difficulty and reduces pain and discomfort of patients.

Description

Novel inferior vena cava filter

Technical Field

The invention belongs to the technical field of medical instruments in interventional departments, and particularly relates to a novel inferior vena cava filter.

Background

In the prior art, a great deal of research at home and abroad finds that the recoverable inferior vena cava filter which can be placed for a long time/short time according to the disease condition change of a patient is few, because the recoverable filter has low recovery rate, most of the recoverable inferior vena cava filter can not really show the advantages of the recoverable inferior vena cava filter because the recoverable filter is used as a permanent filter due to endothelialization or difficult taking out.

The inferior vena cava filter is difficult to recycle due to the reasons of thrombus capture, filter penetration through the vascular wall, instability or falling of the filter and the like of the filter taken out of the inferior vena cava filter, and the cost is obviously increased because some products need to be taken out by using special devices, and patients generally do not need to perform secondary operations, so that a lot of inconvenience is brought to the use of the inferior vena cava filter, which is a disadvantage existing in the prior art.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a novel contracted inferior vena cava filter capable of being placed for a long time/a short time.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a novel inferior vena cava filter, is including retrieving hook, trapper, guide bar, filter wire, scalable ring and sleeve pipe, retrieves the hook and sets up at the trapper top, the guide bar with the trapper is connected with threaded connection, and scalable ring cup joints on the guide bar, can realize the filter shrink to can make guide bar and trapper accurate butt joint, make guide bar and trapper butt joint, the filter wire includes trapper filter wire and the branch pipe filter wire that is connected with trapper, branch pipe respectively, twists reverse 0 ~ 50 degree between trapper filter wire and the branch pipe filter wire, can realize the secondary filtration of both ends filter wire, trapper, filter wire and sleeve pipe are connected with the guide bar with the welded mode respectively, can prevent to catch unstability or drop.

Preferably, the filter wire is woven by degradable medical metal wires.

Preferably, the recovery hook is made of degradable flexible high polymer material.

Preferably, the guide rod is made of a memory alloy material.

Preferably, the number of the filter wires is 3-12.

Preferably, the diameter of the filter wire is 1-20 mm.

The invention has the advantages and positive effects that: the guide rod is connected with the connecting catcher in a threaded connection mode, and the catching instability or falling off can be prevented; the guide rod is provided with the telescopic ring, so that the filter can be contracted, and meanwhile, the guide rod and the connecting catcher can be accurately butted.

Drawings

FIG. 1 is a schematic diagram of the general structure of the present invention;

FIG. 2 is a top view of the present invention;

the designations in FIGS. 1-2 have the following meanings: 1-recovery hook, 2-catcher, 3-guide rod, 4-filter wire, 5-telescopic ring, 6-sleeve, 4-1-catcher filter wire and 4-2-branch filter wire.

Detailed Description

In the description of the present invention, it is to be understood that the indicated orientations or positional relationships are all based on the orientations or positional relationships shown in the drawings, and the objects are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the indicated components must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

The following detailed description of specific embodiments of the invention refers to the accompanying drawings.

A novel inferior vena cava filter is shown in figures 1-2, and comprises a recovery hook 1, a catcher 2, a guide rod 3, a filter wire 4, a retractable ring 5 and a sleeve 6, wherein the recovery hook 1 is arranged at the top end of the catcher 2, the guide rod 3 is connected with the catcher 2 in a threaded connection manner, can prevent capture instability or falling off, the telescopic ring 5 is sleeved on the guide rod 3, the contraction of the filter can be realized, and the guide rod 3 can be accurately butted with the catcher 2, the filter wires 4 comprise catcher filter wires 4-1 and branch filter wires 4-2 which are respectively connected with the catcher 2 and the branch pipes, the filter wires 4-1 of the catcher and the filter wires 4-2 of the branch pipes are twisted by 45 degrees to realize the secondary filtration of the filter wires 4 at the two ends, the catcher 2, the filter wire 4 and the sleeve 6 are respectively connected with the guide rod 3 in a welding mode.

The filter wire 4 is woven by degradable medical metal wires, in particular metal magnesium.

The recovery hook 1 is a degradable flexible polymer material, and is selected from one of polycaprolactone, polyglycolic acid, polylactic acid or poly morpholine dione, and this embodiment is specifically polylactic acid.

The guide rod 3 is made of memory alloy material, in particular nickel-titanium alloy.

The number of the filter wires 4 is 8, wherein 4 filter wires 4-1 of the catcher and 4 filter wires 4-2 of the branch pipes are provided, and the diameter of each filter wire 4 is 10 mm.

In use of the invention, in order to ensure access, the cannula 6 can be fully advanced onto the trap 2 before being withdrawn onto the separate catheter, in other words, the cannula 6 is advanced over the guide rod 3, the telescopic ring 5, which is sleeved over the guide rod 3, can effect the retraction of the filter and can bring said guide rod 3 into exact abutment with the trap 2, "closing the trap" and securely accessing the implant to be withdrawn, and the withdrawal of the guide rod 3 is continued until the implant is also pulled therein.

The above embodiments are merely preferred embodiments of the present invention, and any simple modification, modification and substitution changes made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A novel inferior vena cava filter is characterized in that: comprises a recovery hook (1), a catcher (2), a guide rod (3), a filter wire (4), a telescopic ring (5) and a sleeve (6), wherein the recovery hook (1) is arranged at the top end of the catcher (2), the guide rod (3) and the catcher (2) are connected in a threaded manner, the telescopic ring (5) is sleeved on the guide rod (3) to ensure that the guide rod (3) is butted with the catcher (2), the filter wires (4) comprise a catcher filter wire (4-1) and a branch pipe filter wire (4-2) which are respectively connected with the catcher (2) and the branch pipe, the filter wires (4-1) of the catcher and the filter wires (4-2) of the branch pipes are twisted by 0 to 50 degrees, the catcher (2), the filter wire (4) and the sleeve (6) are respectively connected with the guide rod (3) in a welding mode.

2. The novel inferior vena cava filter according to claim 1, wherein: the filter wire (4) is woven by degradable medical metal wires.

3. The novel inferior vena cava filter according to claim 1, wherein: the recovery hook (1) is made of degradable flexible high polymer materials.

4. The novel inferior vena cava filter according to claim 1, wherein: the guide rod (3) is made of memory alloy material.

5. The novel inferior vena cava filter according to claim 1, wherein: the number of the filter wires (4) is 3-12.

6. The novel inferior vena cava filter according to claim 1, wherein: the diameter of the filter wire (4) is 1-20 mm.