CN209574960U - A kind of novel retrievable vena cava filter - Google Patents
A kind of novel retrievable vena cava filter Download PDFInfo
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- CN209574960U CN209574960U CN201822215667.XU CN201822215667U CN209574960U CN 209574960 U CN209574960 U CN 209574960U CN 201822215667 U CN201822215667 U CN 201822215667U CN 209574960 U CN209574960 U CN 209574960U
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- filter
- filter rod
- vena cava
- rod
- hook
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Abstract
The utility model belongs to the field of medical instrument technology, is related to a kind of novel retrievable vena cava filter, especially a kind of for filtering thrombus in human body vena cave blood vessel, with medicine-carried, vena cava filter device that is recyclable and may filter that the characteristics such as often；Its main structure includes: guide head, front end outer layer filter rod, front end internal layer filter rod, upper support, lower support, drug slot, location hook, rear end filter rod and recovering hook；Using the symmetrical support construction of two sections, be conducive to neutrality, and possess good adherence quality；Equipped with location hook for preventing sliding or being washed away by blood flow；It, can the drug equipped with thrombolytic drug and inhibition proliferation of smooth muscle in drug slot equipped with drug slot；Equipped with recovering hook, filter can be recycled, enable to recycle more convenient after the mission that filter completes filtering thrombus；Its design principle science, design structure is succinct, and histocompatbility is good, and nuclear-magnetism good compatibility, adherence quality is good, and anti-dropout is good, and application environment is friendly.
Description
Technical field:
The utility model relates to the field of medical instrument technology, in particular to a kind of novel retrievable vena cava filter.
Background technique:
The people to live under modern society, due to life stress is big, irregular and diet of working and resting is unhealthy etc.
Under effect, forms lower-limb deep veins thrombus and have become common disease clinically, which is also to lead to pulmonary embolism
One of the major reasons, and the death rate and disability rate of the pulmonary embolism caused by phlebothrombosis can not have always been high any more.Into
Promoting circulation of blood bolt anticoagulant therapy be always treat phlebothrombosis goldstandard, it is therefore an objective to antithrombotic, prevent pulmonary embolism with
And restore the unobstructed of embolism vein, but when patient has anticoagulant taboo or in anticoagulant therapy phenomena such as hemorrhage complication occurs,
Just it can only abandon being treated by the anticoagulant scheme of thrombus.And by clinical artificial merging inferior vena cava filter, then became
Hemofiltration bolt and another effective therapy approach for preventing pulmonary embolism, therefore use of the venous filter in clinic has been cured at present
That sends out is universal.The basic functional principle of venous filter is the strainer by being placed at vena cave, to capture and intercept vein
In may have fatefulue big thrombus or larger thrombus, so that it be avoided to enter among the blood circulation of lung, prevention is caused
The generation of dead property pulmonary embolism.
Common vena cava filter is divided into permanent vena cava filter in DVT patients and retrievable vena cava filter in the prior art.Forever
Clinically more than 40 years, major defect was that cannot be taken again after being implanted into human vein to long property vena cava filter for application
Out；So while permanent vena cava filter in DVT patients reduces the generation of pulmonary embolism, but also bring inferior vena cava thrombosis, recurrence and quiet
The long term complications such as arteries and veins reflux obstacle.In order to improve the using effect of filter, the influence of complication is reduced, makes thromboembolism treatment more
Safety, people constantly propose new design scheme to filter, or existing filter is modified and improved, to expedite the emergence of each
The non-permanent filter of kind occurs successively, so that the implantation indication of filter is gradually expanded, wherein the most widely used is recyclable
Vena cava filter can effectively reduce the disease incidence of long term complication；When the risk factor of pulmonary embolism persistently exists,
When having big thrombus or recycling to fail in filter, retrievable vena cava filter can be used as permanent filter and stay in the body, such as
No above-mentioned factor exists, pulmonary embolism critical days spend after can then be drawn off.However after the application of its larger scale clinical,
Gradually discovery can be taken off filter when using needing to be drawn off for a period of time, and can largely encounter that filter is difficult to take out intractable asks
Topic, analyze it and be primarily present two big reasons: vena cava filter and inferior caval vein wall form adhesion and form vena cava filter
Interior thrombus.China Patent Publication No. CN206499550U discloses a kind of vena cava filter device, and this application only devises one
Layer filter structure, and the problem that unresolved capturing efficiency is low.The patent of invention that Chinese Patent Application No. is 201610277846.9
Application discloses a kind of vena cava filter, mainly solves the problems, such as crank-sided after vena cava filter is placed in blood vessel comprising
Two layers of pillar of upper supporting column 2 and lower supporting rod, upper supporting column and lower supporting rod and blood vessel are disposed as point contact, to increase fixed steady
It is qualitative, but due to the lower supporting rod that is shorter in length than of upper supporting column, after opening, the distance between adjacent two upper supporting column is greater than adjacent two lower
The distance between column only has the network of upper supporting column composition to have the effect of filtering thrombus in this way, and lower supporting rod only has positioning
The complex degree of structure of effect, vena cava filter increases, but without enhancing the filter effect to thrombus.
Therefore, seeking to design one kind can effectively avoid vena cava filter and inferior caval vein wall from forming adhesion, and can use up
Amount reduce vena cava filter in thrombosis probability it is novel return vena cava filter be very it is necessary to.
Summary of the invention:
The goal of the invention of the utility model is to overcome disadvantage of the existing technology, seeks to design one kind being not easy to form filter
Thrombus in device, histocompatbility is good, and nuclear-magnetism good compatibility, adherence quality is good, and anti-dropout is good, and design structure is succinct, have compared with
The novel retrievable vena cava filter that high embolus capture radio passes through without influencing blood flow.
In order to achieve the above-mentioned object of the invention, novel retrievable vena cava filter main structure packet described in the utility model
Include: guide head, front end outer layer filter rod, front end internal layer filter rod, upper support, lower support, drug slot, location hook, rear end filter rod and
Recovering hook；Guide head is set to the stem of filter, is weldingly connected with the upper end of all front end outer layer filter rods and front end internal layer filter rod；Before
Hold outer layer filter rod and front end internal layer filter rod to be set between guide head and upper support, the lower end of front end outer layer filter rod with upper support
It is weldingly connected at the wave crest of body, the lower end of front end internal layer filter rod is weldingly connected at the trough of upper support；Upper support with
Lower support is that sinusoidal configuration symmetrical above and below is all provided on the ontology of upper support and lower support set on the centre of filter
There is drug slot, outside is equipped with location hook at the trough of lower support；Rear end filter rod is set between lower support and recovering hook, rear end
The upper end of filter rod is weldingly connected at the trough of lower support, and the lower end of rear end filter rod is weldingly connected with recovering hook；Recycling
Hook is set to the tail portion of filter, symmetrical with the guide head set on stem；Wherein, the front end outer layer filter rod shares the six roots of sensation, preceding
End internal layer filter rod shares three, and rear end filtering rod shares the six roots of sensation；Drug slot is equipped with 24 altogether, upper support and lower support
12 are respectively provided on ontology；There are six location hook is total, at a trough of lower support.
The novel retrievable vena cava filter uses the symmetrical support construction of two sections, is conducive to neutrality, and gather around
There is good adherence quality；Equipped with location hook for preventing sliding or being washed away by blood flow, there is high stability and adherence quality；Equipped with medicine
Slot equipped with thrombolytic drug and can inhibit the drug of proliferation of smooth muscle in drug slot, can dissolve filter and capture in placement process
Thrombus, while can be avoided vascular wall hyperplasia and causing angiemphraxis, reached better therapeutic effect, and reduce complication
Probability；Equipped with recovering hook, filter can be recycled after the mission that filter completes filtering thrombus, enable to recycling more
Add conveniently.
After novel retrievable vena cava filter described in the utility model implants, it is different from permanent type filter, it can
To be recycled after a while, complication can be effectively reduced；When thrombus be easy to cause blood vessel too much on filter rod
When blocking, filter can be taken out, make restoration of blood flow unimpeded and effectively filter thrombus.
The utility model compared with prior art, is not easy to be formed thrombus in filter, there is higher embolus capture radio
Pass through without influencing blood flow, design principle science, design structure is succinct, and histocompatbility is good, nuclear-magnetism good compatibility, adherence quality
Good, anti-dropout is good, and application environment is friendly.
Detailed description of the invention:
Fig. 1 is the whole assembly schematic illustration the utility model relates to vena cava filter.
Fig. 2 is that the utility model relates to the guide head schematic illustrations of vena cava filter.
Specific embodiment:
The utility model is further elaborated below by specific embodiments and the drawings.
Embodiment 1:
Novel retrievable vena cava filter described in the present embodiment, main structure include: guide head 1, the filter of front end outer layer
Bar 2, front end internal layer filter rod 3, upper support 4, lower support 5, drug slot 6, location hook 7, rear end filter rod 8 and recovering hook 9；Guide head
1 is set to the stem of filter, is weldingly connected with the upper end of front end outer layer filter rod 2 and front end internal layer filter rod 3；2 He of front end outer layer filter rod
Front end internal layer filter rod 3 is set between guide head 1 and upper support 4, wave of the lower end of front end outer layer filter rod 2 with upper support 4
It is weldingly connected at peak, the lower end of front end internal layer filter rod 3 is weldingly connected at the trough of upper support 4；Upper support 4 and lower branch
Support body 5 is that sinusoidal configuration symmetrical above and below is equipped on upper support 4 and the ontology of lower support 5 set on the centre of filter
Drug slot 6, outside is equipped with location hook 7 at the trough of lower support 5；Rear end filter rod 8 is set between lower support 5 and recovering hook 9,
The upper end of rear end filter rod 8 is weldingly connected at the trough of lower support 5, and phase is welded with recovering hook 9 in the lower end of rear end filter rod 8
Even；Recovering hook 9 is set to the tail portion of filter, symmetrical with the guide head 1 set on stem；
Wherein, the front end outer layer filter rod 2 shares the six roots of sensation, and front end internal layer filter rod 3 shares three, and rear end filtering rod 7 is total
There is the six roots of sensation；Drug slot 6 is equipped with 24 altogether, is respectively provided with 12 on the ontology of upper support 4 and lower support 5；Location hook 7 is total
There are six, at 6 troughs of lower support 5.
The novel retrievable vena cava filter uses the symmetrical support construction of two sections, is conducive to neutrality, and gather around
There is good adherence quality；Equipped with location hook 7 for preventing sliding or being washed away by blood flow, there is high stability and adherence quality；It is equipped with
Drug slot 6 equipped with thrombolytic drug and can inhibit the drug of proliferation of smooth muscle in drug slot 6, can dissolve filter and catch in placement process
The thrombus grasped, while can be avoided vascular wall hyperplasia and causing angiemphraxis, reach better therapeutic effect, and reduce simultaneously
Send out the probability of disease；Equipped with recovering hook 9, filter can be recycled, enabled to back after the mission that filter completes filtering thrombus
It receives more convenient.
After novel retrievable vena cava filter described in the present embodiment implants, it is different from permanent type filter, it can be with
It is recycled after a while, can effectively reduce complication；When thrombus be easy to cause blood vessel stifled too much on filter rod
When plug, recovering hook can be extracted by seal wire and take out filter, made restoration of blood flow unimpeded and effectively filtered thrombus.
Embodiment 2:
The main structure of novel retrievable vena cava filter described in the present embodiment is same as Example 1, the present embodiment master
It is used to describe its preparation process and material therefor.
The main structure of novel retrievable vena cava filter described in the present embodiment uses Nitinol super elastic memory material
Material forms by laser engraving welding thermal finalization, has good flexibility and support performance；Wherein guide head 1 and recycling
Hook 9 uses flexible high molecular material, and front end outer layer filter rod 2, upper support 4 and rear end filter rod 8 are formed by laser engraving；Front end
Internal layer filter rod 3 uses Nitinol, is connected by laser welding with guide head 1 and upper support 4.
Claims (3)
1. a kind of novel retrievable vena cava filter, it is characterised in that main structure includes: guide head, front end outer layer filter rod, preceding
Internal layer filter rod, upper support, lower support, drug slot, location hook, rear end filter rod and recovering hook are held, guide head is set to filter
Stem is weldingly connected with the upper end of all front end outer layer filter rods and front end internal layer filter rod；Front end outer layer filter rod and the filter of front end internal layer
Bar is set between guide head and upper support, and the lower end of front end outer layer filter rod is weldingly connected at the wave crest of upper support, preceding
The lower end of end internal layer filter rod is weldingly connected at the trough of upper support；Upper support and lower support be it is symmetrical above and below just
String wave structure is equipped with drug slot set on the centre of filter on the ontology of upper support and lower support, at the trough of lower support
Outside is equipped with location hook；Rear end filter rod is set between lower support and recovering hook, and the upper end of rear end filter rod is and lower support
Trough at be weldingly connected, the lower end of rear end filter rod is weldingly connected with recovering hook；Recovering hook is set to the tail portion of filter, and is set to
The guide head of stem is symmetrical.
2. novel retrievable vena cava filter according to claim 1, it is characterised in that the front end outer layer filter rod is total
There is the six roots of sensation, respectively circumferential loop distribution, front end internal layer filter rod shares three, and rear end filtering rod shares the six roots of sensation, respectively circumferential circulation
Distribution；Drug slot is equipped with 24 altogether, is circumferentially distributed on supporter respectively, respectively sets on the ontology of upper support and lower support
There are 12；There are six location hook is total, at a trough of lower support.
3. novel retrievable vena cava filter according to claim 2, it is characterised in that neutral good, three layer filtration, mistake
Often, thrombus filterability is good for filter, can be recycled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822215667.XU CN209574960U (en) | 2018-12-27 | 2018-12-27 | A kind of novel retrievable vena cava filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822215667.XU CN209574960U (en) | 2018-12-27 | 2018-12-27 | A kind of novel retrievable vena cava filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209574960U true CN209574960U (en) | 2019-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822215667.XU Expired - Fee Related CN209574960U (en) | 2018-12-27 | 2018-12-27 | A kind of novel retrievable vena cava filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112336496A (en) * | 2020-11-19 | 2021-02-09 | 杭州云普医疗器械有限公司 | Medicine vein filter and manufacturing method thereof |
-
2018
- 2018-12-27 CN CN201822215667.XU patent/CN209574960U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112336496A (en) * | 2020-11-19 | 2021-02-09 | 杭州云普医疗器械有限公司 | Medicine vein filter and manufacturing method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191105 Termination date: 20201227 |