CN111329619A - Umbrella-shaped recyclable venous thrombus filter - Google Patents
Umbrella-shaped recyclable venous thrombus filter Download PDFInfo
- Publication number
- CN111329619A CN111329619A CN202010265698.5A CN202010265698A CN111329619A CN 111329619 A CN111329619 A CN 111329619A CN 202010265698 A CN202010265698 A CN 202010265698A CN 111329619 A CN111329619 A CN 111329619A
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- China
- Prior art keywords
- umbrella
- shaped
- filter screen
- filter
- shaped filter
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- Pending
Links
- 208000007536 Thrombosis Diseases 0.000 title claims abstract description 17
- 238000011084 recovery Methods 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 15
- 238000009941 weaving Methods 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 206010047249 Venous thrombosis Diseases 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 2
- 210000004204 blood vessel Anatomy 0.000 abstract description 10
- 238000002513 implantation Methods 0.000 abstract description 8
- 230000007774 longterm Effects 0.000 abstract description 7
- 206010051055 Deep vein thrombosis Diseases 0.000 description 5
- 208000010378 Pulmonary Embolism Diseases 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 238000003698 laser cutting Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 210000001147 pulmonary artery Anatomy 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 210000001631 vena cava inferior Anatomy 0.000 description 2
- 208000005189 Embolism Diseases 0.000 description 1
- 206010037340 Pulmonary artery thrombosis Diseases 0.000 description 1
- 208000001435 Thromboembolism Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003511 endothelial effect Effects 0.000 description 1
- 210000003038 endothelium Anatomy 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000554 physical therapy Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/01—Filters implantable into blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0093—Umbrella-shaped, e.g. mushroom-shaped
Landscapes
- Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses an umbrella-shaped recyclable venous thrombus filter, and belongs to the technical field of venous thrombus filters. It is composed of an umbrella-shaped filter screen, a recovery pipe and a supporting pin; the umbrella-shaped filter screen is a hollow conical-structure memory metal wire filter screen formed by cutting or weaving memory metal through laser; the support structure is characterized in that a support stitch is arranged at the tail end of each memory metal wire around the opening of the umbrella-shaped filter screen, the support stitch is parallel to the central axis of the umbrella-shaped filter screen, the support stitch and the outwards-protruded umbrella-shaped filter screen jointly form a folding structure with a V-shaped section, at least one layer of outward-facing positioning barbs are arranged on the support stitch, and each layer of positioning barbs is formed by uniformly distributing a plurality of hooks in each direction. The filter is well jointed with the blood vessel, is stable in support, is easy to take out after long-term implantation, can be used as a permanent filter for long-term implantation, and can also be used as a recyclable filter for short-term use.
Description
Technical Field
The invention relates to an umbrella-shaped recyclable venous thrombus filter, and belongs to the technical field of venous thrombus filters.
Background
At present, the incidence of Deep Vein Thrombosis (DVT) formation is increased day by day, and once the vein thrombosis falls off, the vein thrombosis can enter and block the pulmonary artery along with the blood flow, so that the clinical manifestation of pulmonary artery thrombosis Plug (PE) is caused. The incidence of Deep Vein Thrombosis (DVT) is about 1/1000 per year in the united states. Approximately 1/3 untreated symptomatic patients were combined into pulmonary artery thromboembolism (PE).
The most effective physical therapy for the prevention of pulmonary thromboembolism (PE) is the placement of a thrombus filter in the vein. The thrombus filter is divided into two types: permanent filters and recyclable filters. The permanent filter can provide a lifelong filtering function, has the maximum lumen vein intimal fixation force, and has research verification that the incidence of PE can be effectively reduced after the filter is implanted, but the popularization is limited because the long-term implantation in vivo can cause complications such as inferior vena cava perforation, filter displacement and secondary thrombus, inferior vena cava occlusion, DVT recurrence and the like; the recyclable filter has an advantage that it can be placed in the body as a permanent filter for a long period of time and can also be taken out as a semipermanent filter, but has a disadvantage that the filter is placed in the body as a semipermanent filter for a short period of time, generally only 2 weeks, and after exceeding the taking-out time window, the filter is adhered to the blood vessel wall to be integrated due to the problem of endothelialization caused by the barbs, and thus is not easily taken out. Clinical data at home and abroad show that less than 30% of the recoverable filters which can be successfully taken out remain in the body, so that the advantages of the selectable filters are not obvious. The reason for the low extraction rate is that the filter has a short extraction window and the extraction requires more complicated operating techniques and additional equipment, which increases the treatment costs.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides an umbrella-shaped recyclable venous thrombus filter, which solves the problem that the existing venous thrombus filter is inconvenient to take out.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
an umbrella-shaped recyclable venous thrombus filter, which consists of an umbrella-shaped filter screen, a recycling pipe and a supporting stitch;
the umbrella-shaped filter screen is a hollow conical-structure memory metal wire filter screen formed by cutting or weaving memory metal through laser;
the tail end of each memory metal wire around the opening of the umbrella-shaped filter screen is provided with a supporting pin, the supporting pins are parallel to the central axis of the umbrella-shaped filter screen, the supporting pins and the outwards-protruded umbrella-shaped filter screen jointly form a folding structure with a V-shaped section, at least one layer of outward-facing positioning barbs are arranged on the supporting pins, and each layer of positioning barbs is formed by uniformly distributing a plurality of hook bodies in each direction;
and a recovery pipe is fixed at the top of the umbrella-shaped filter screen, and a recovery hook groove is formed in the recovery pipe.
As a preferred example, the umbrella-shaped filter screen is made of a nickel-titanium alloy material.
As a preferred example, the support pins are made of 316L stainless steel material or nitinol material.
As a preferred example, the end of the supporting pin is provided with a layer of positioning barbs, and the hook bodies of the positioning barbs are formed by bending the end of the supporting pin outwards.
As a preferable example, a layer of positioning barb is arranged at the joint of the supporting pin and the umbrella-shaped filter screen, and the hook body of the positioning barb is welded on the outer side of the supporting pin.
The invention has the beneficial effects that:
(1) the filter adopts an open-loop design with an opening at one end, a plurality of supporting pins are uniformly distributed along the circumferential direction, the supporting pins play a supporting role in the circumferential direction to prevent the blood vessel from deforming, and the open-loop design (the open structure is adopted at the far end) ensures that the filter can not be completely wrapped by the endothelial growth after the filter is placed for a long time, thereby prolonging the window period for taking out the filter;
(2) the near end of the filter adopts an umbrella-shaped filter screen structure, and the umbrella-shaped filter screen is conical, so that the secondary blockage of the blood vessel caused by the fact that endothelium is attached to the near end of the filter can be prevented;
(3) the support pins are provided with at least one layer of outward positioning barbs, so that the implanted filter can be prevented from shifting, the hook bodies of the positioning barbs are formed by bending the tail ends of the support pins outwards, the integrity is better, the manufacturing cost is saved, the other layer of positioning barbs are welded at the connecting parts of the support pins and the umbrella-shaped filter screen, and the filter is positioned more firmly by the double layers of positioning barbs;
(4) the filter is well jointed with the blood vessel, is stable in support, is easy to take out after long-term implantation, can be used as a permanent filter for long-term implantation, and can also be used as a recyclable filter for short-term use.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic side view of the present invention;
fig. 3 is a schematic view of the proximal end face structure of the present invention.
In the figure: the device comprises an umbrella-shaped filter screen 1, a recovery pipe 2, a recovery hook groove 21, a support pin 3 and a positioning barb 4.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the invention easy to understand, the invention is further described with reference to the specific drawings.
As shown in fig. 1-3, an umbrella-shaped recoverable venous thrombus filter is composed of an umbrella-shaped filter screen 1, a recovery pipe 2 and a support stitch 3;
the umbrella-shaped filter screen 1 is a hollow conical-structure memory metal wire filter screen formed by laser cutting or weaving memory metal;
the tail end of each memory metal wire around the opening of the umbrella-shaped filter screen 1 is provided with a supporting pin 3, the supporting pins 3 are parallel to the central axis of the umbrella-shaped filter screen 1, the supporting pins 3 and the outwards-protruded umbrella-shaped filter screen 1 jointly form a folding structure with a V-shaped section, at least one layer of outward-facing positioning barbs 4 are arranged on the supporting pins 3, and each layer of positioning barbs 4 is formed by uniformly distributing a plurality of hooks in each direction;
a recovery pipe 2 is fixed on the top of the umbrella-shaped filter screen 1, and a recovery hook groove 21 is arranged on the recovery pipe 2.
The umbrella-shaped filter screen 1 is made of nickel-titanium alloy material.
The support pins 3 are made of 316L stainless steel material or nitinol material.
Example 1
As shown in fig. 1, only one filter layer with positioning barbs 4 is provided. The tail end of the supporting pin 3 is provided with a layer of positioning barb 4, and the hook body of the positioning barb 4 is formed by bending the tail end of the supporting pin 3 outwards. The periphery of the opening of the umbrella-shaped filter screen 1 is provided with 6 memory metal wires and 6 supporting pins 3. Usually 6-8 memory wires and corresponding support stitches 3 are provided at the opening. The umbrella-shaped filter screen 1 and the supporting pins 3 are formed into an integral structure by laser cutting of memory metal or are formed into an integral structure by adopting a welding mode.
Example 2
As shown in fig. 2, a filter is provided with a double layer of positioning barbs 4. Besides the layer of positioning barbs 4 arranged at the tail ends of the supporting pins 3, another layer of positioning barbs 4 is arranged at the connecting positions of the supporting pins 3 and the umbrella-shaped filter screen 1, hooks of the another layer of positioning barbs 4 are welded on the outer sides of the supporting pins 3, and the welded hooks are made of 316L stainless steel materials or nickel-titanium alloy materials.
The working principle is as follows:
folding the filter through a V-shaped fold configuration to form an elongated tubular structure prior to implantation of the filter; the filter is released to a preset position in the blood vessel through the thrombus filter releasing device, after the filter is released, the memory metal wire restores to a natural state, the blood vessel is propped up, and thrombus is filtered through the umbrella-shaped filter screen 1. During the recovery, the recovery hook groove 21 on the recovery pipe 2 is hooked by a special catcher, and the filter is taken out.
The filter adopts an open-loop design with an opening at one end (the opening end is a medical far end), a plurality of supporting pins 3 are uniformly distributed along the circumferential direction, the supporting pins 3 play a supporting role in the circumferential direction, the deformation of blood vessels is prevented, and the filter is convenient to take out;
the near end of the filter adopts an umbrella-shaped filter screen 1 structure, the umbrella-shaped filter screen 1 is conical and is supported by a support pin 3, the inner part of the filter is not easy to attach to the umbrella-shaped filter screen 1, and the inner skin can be prevented from attaching to the near end of the filter to cause secondary blockage of blood vessels;
the support pins 3 are provided with at least one layer of positioning barbs 4 facing outwards, so that the implanted filter can be prevented from being displaced.
The hook body of the positioning barb 4 is formed by bending the tail end of the supporting pin 3 outwards, the integrity is better, the manufacturing cost is saved, another layer of positioning barb 4 is welded at the joint of the supporting pin 3 and the umbrella-shaped filter screen 1, and the filter is positioned more firmly by the double-layer positioning barb 4.
The filter is well jointed with the blood vessel, is stable in support, is easy to take out after long-term implantation, can be used as a permanent filter for long-term implantation, and can also be used as a recyclable filter for short-term use.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. An umbrella-shaped recyclable venous thrombus filter is characterized by comprising an umbrella-shaped filter screen, a recycling pipe and a support stitch;
the umbrella-shaped filter screen is a hollow conical-structure memory metal wire filter screen formed by cutting or weaving memory metal through laser;
the tail end of each memory metal wire around the opening of the umbrella-shaped filter screen is provided with a supporting pin, the supporting pins are parallel to the central axis of the umbrella-shaped filter screen, the supporting pins and the outwards-protruded umbrella-shaped filter screen jointly form a folding structure with a V-shaped section, at least one layer of outward-facing positioning barbs are arranged on the supporting pins, and each layer of positioning barbs is formed by uniformly distributing a plurality of hook bodies in each direction;
and a recovery pipe is fixed at the top of the umbrella-shaped filter screen, and a recovery hook groove is formed in the recovery pipe.
2. The umbrella-shaped recyclable venous thrombus filter according to claim 1, wherein the umbrella-shaped filter screen is made of a nickel-titanium alloy material.
3. The umbrella-type retrievable venous thrombosis filter as claimed in claim 1, wherein the support pins are made of 316L stainless steel material or nitinol material.
4. The umbrella-shaped recyclable venous thrombosis filter as claimed in claim 1, wherein the supporting stitch is provided at its distal end with a layer of positioning barbs, the hooks of the positioning barbs being formed by bending the supporting stitch at its distal end.
5. The umbrella-shaped recyclable phlebothrombosis filter according to claim 1, wherein a layer of positioning barbs are arranged at the joint of the support pin and the umbrella-shaped filter screen, and hooks of the positioning barbs are welded outside the support pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010265698.5A CN111329619A (en) | 2020-04-07 | 2020-04-07 | Umbrella-shaped recyclable venous thrombus filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010265698.5A CN111329619A (en) | 2020-04-07 | 2020-04-07 | Umbrella-shaped recyclable venous thrombus filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111329619A true CN111329619A (en) | 2020-06-26 |
Family
ID=71176869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010265698.5A Pending CN111329619A (en) | 2020-04-07 | 2020-04-07 | Umbrella-shaped recyclable venous thrombus filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111329619A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6468290B1 (en) * | 2000-06-05 | 2002-10-22 | Scimed Life Systems, Inc. | Two-planar vena cava filter with self-centering capabilities |
| CN200942133Y (en) * | 2006-07-26 | 2007-09-05 | 韩新巍 | Recoverable filter type intravascular stent |
| CN203841850U (en) * | 2014-03-31 | 2014-09-24 | 孙媛 | Withdrawable inferior vena cava filter |
| US20150265390A1 (en) * | 2014-03-19 | 2015-09-24 | Cook Medical Technologies Llc | Vascular filter |
| CN105476729A (en) * | 2016-01-08 | 2016-04-13 | 江阴法尔胜佩尔新材料科技有限公司 | Vena cava filter nickel-titanium stent |
| CN206934207U (en) * | 2016-12-30 | 2018-01-30 | 科塞尔医疗科技（苏州）有限公司 | Thrombus filter |
| CN107928839A (en) * | 2018-01-04 | 2018-04-20 | 科塞尔医疗科技（苏州）有限公司 | A kind of degradable vena cava filter in part |
| CN109069253A (en) * | 2016-04-28 | 2018-12-21 | 深圳市科奕顿生物医疗科技有限公司 | A kind of inferior vena cava filter |
| CN110169843A (en) * | 2019-06-20 | 2019-08-27 | 哈尔滨工业大学（威海） | A kind of lotus flap-type bilayer point support recoverable version vena cava filter and production method |
| CN110840621A (en) * | 2019-12-19 | 2020-02-28 | 成都迈德克科技有限公司 | Vena cava filter |
| CN212213933U (en) * | 2020-04-07 | 2020-12-25 | 上海善迪医疗科技有限公司 | Umbrella-shaped recyclable venous thrombus filter |
-
2020
- 2020-04-07 CN CN202010265698.5A patent/CN111329619A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6468290B1 (en) * | 2000-06-05 | 2002-10-22 | Scimed Life Systems, Inc. | Two-planar vena cava filter with self-centering capabilities |
| CN200942133Y (en) * | 2006-07-26 | 2007-09-05 | 韩新巍 | Recoverable filter type intravascular stent |
| US20150265390A1 (en) * | 2014-03-19 | 2015-09-24 | Cook Medical Technologies Llc | Vascular filter |
| CN203841850U (en) * | 2014-03-31 | 2014-09-24 | 孙媛 | Withdrawable inferior vena cava filter |
| CN105476729A (en) * | 2016-01-08 | 2016-04-13 | 江阴法尔胜佩尔新材料科技有限公司 | Vena cava filter nickel-titanium stent |
| CN109069253A (en) * | 2016-04-28 | 2018-12-21 | 深圳市科奕顿生物医疗科技有限公司 | A kind of inferior vena cava filter |
| CN206934207U (en) * | 2016-12-30 | 2018-01-30 | 科塞尔医疗科技（苏州）有限公司 | Thrombus filter |
| CN107928839A (en) * | 2018-01-04 | 2018-04-20 | 科塞尔医疗科技（苏州）有限公司 | A kind of degradable vena cava filter in part |
| CN110169843A (en) * | 2019-06-20 | 2019-08-27 | 哈尔滨工业大学（威海） | A kind of lotus flap-type bilayer point support recoverable version vena cava filter and production method |
| CN110840621A (en) * | 2019-12-19 | 2020-02-28 | 成都迈德克科技有限公司 | Vena cava filter |
| CN212213933U (en) * | 2020-04-07 | 2020-12-25 | 上海善迪医疗科技有限公司 | Umbrella-shaped recyclable venous thrombus filter |
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