CN102178569B - Controlled release vena cava filter and processing method thereof - Google Patents
Controlled release vena cava filter and processing method thereof Download PDFInfo
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- CN102178569B CN102178569B CN 201110152112 CN201110152112A CN102178569B CN 102178569 B CN102178569 B CN 102178569B CN 201110152112 CN201110152112 CN 201110152112 CN 201110152112 A CN201110152112 A CN 201110152112A CN 102178569 B CN102178569 B CN 102178569B
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Abstract
The invention relates to a controlled release vena cava filter and a processing method thereof. The vena cava filter comprises a body and a conveying steel cable, wherein the front end of the conveying steel cable is connected with an embolus head with screw rods. The vena cava filter is characterized in that a tail pipe body of the body is provided with a plurality of recessed rectangular pieces; and the recessed rectangular pieces form spiral guide bulges matched with external threads of the screw rods in the tail pipe body. The vena cava filter has the following beneficial effects: the spiral guide bulges matched with the external threads of the screw rods of the embolus head are directly processed on the tail pipe body of the body; a connecting part for controllable connection is manufactured on the tail pipe body by utilizing the nickel-titanium alloy pipes which are used for manufacturing the body, thus avoiding corrosion, shedding and the like caused because the connecting part and the body adopt different materials; and the vena cava filter has the advantages of reasonable structure, simpleness and reliability in connection, convenience in operation and use and high safety performance.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, specifically a kind of vena cava filter of controllable release and processing method thereof.
Background technology
As everyone knows, pulmonary infarction is one of higher sudden illness of fatality rate, about 75%～90% the embolus that causes pulmonary infarction derives from lower limb and pelvic veins, at renal veins opening placement one defecator below horizontal, free embolus in the interception blood, can effectively prevent the generation of pulmonary infarction, this technology is popularized at home gradually in recent years.
At present vena cava filter can be divided into forever and insert, inserts temporarily and three kinds of permanent interim one.Wherein use widely used, the most representative vena cava filter has reduced the impact of thrombosis on pulmonary circulation to greatest extent, but along with the popularization of vena cava filter in clinical practice, many problems also come out gradually.Present performance requirement to filter, can be summarized as 4 points: namely insert performance, take out performance, long term effect and thrombosis intercepting efficiency generally believe that desirable filter should have: be easy to insert, safety durable, effectively catch thrombosis, good blood flow, stable without displacement, can be used for that large diameter postcava, MRI are safe, multiple inserts approach and can reclaim the characteristics such as taking-up.
Since sixties first vena cava filter came out, existing ten multiple products were widely used in clinical both at home and abroad.But the various filters of current popular more or less all can have the shortcoming of self, wherein the uncontrollability of vena cava filter implantation process and can not repeating discharge and locate direct affect product be easy to implant performance.External product adopts at present mostly directly pusher, sends in the filter process, and carrier and filter are without directly being connected control structure, cause placement location uncontrollable, can not repeatedly discharge, cause positioning performance bad, in the serious situation, stop up renal veins and cause renal necrosis.And at present domestic contrast popular be to adopt interim/permanent integral type, vena cava filter product integral body is spindle, the single layer filter net can effectively catch thrombosis and can guarantee again to significantly improve at a specified future date unobstructed, unique mooring anchor design to the attached ability of grabbing of blood vessel wall.Use controlled release technologies, accurate positioning, skip before when fully avoiding discharging.But the method that realizes controlled release technologies but is to realize being threaded at screwed plug head of tubing interior welds, because the machining property of Nitinol is relatively poor, be difficult to carry out screw thread processing at nickel-titanium alloy material, therefore screwed plug head material is rustless steel, is different from the Nitinol material of filter.But exist electrochemical reaction between unlike material, the rear easy corrosion that implants, the time is more of a specified duration, corrodes more severely, the screwed plug head is come off from filter, so effect is also not satisfactory.
Summary of the invention
Technical problem to be solved by this invention is to overcome weld stud head in the above-mentioned prior art, the deficiency that causes bolt head burn into to come off provides a kind of rational in infrastructure, connects simple, reliable, easy for operation, the vena cava filter of the controllable release that security performance is high and processing method thereof.
The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of vena cava filter of controllable release, it includes the filter main body, carries wirerope, carry the wirerope front end to connect a bolt head with screw mandrel, the afterbody body of filter main body is provided with drag hook, it is characterized in that: also be provided with some recessed rectangular sheets on the afterbody body of filter main body, recessed rectangular sheet forms the spirally-guided projection with screw mandrel external screw thread coupling in the afterbody body.
The processing method of the vena cava filter of controllable release of the present invention, it is characterized in that: utilize laser cutting machine, engrave out the main body decorative pattern on the nickel-titanium alloy surface, cut out some rectangular sheets on the nickel-titanium alloy afterbody body hand of spiral, the rear end of afterbody body cuts out drag hook, then produce elastomeric spindle gauze filter main body by heat treatment shaping, rectangular sheet is pressed in the afterbody body simultaneously, pass through heat treatment shaping, in the afterbody body, form some recessed rectangular sheets, to carry the wirerope front end to connect a bolt head with screw mandrel, the spirally-guided projection that some recessed rectangular sheets form in bolt head front end screw mandrel and the afterbody body is connected, realization conveying wirerope is connected with the filter main body, can make things convenient for precession, screw out, consist of the vena cava filter of controllable release.
The present invention directly processes the spirally-guided projection with bolt captacula bar external screw thread coupling on the afterbody body of filter main body, be equivalent to form in the afterbody body nut that is connected cooperation with bolt head front end screw mandrel.It utilizes the nickel-titanium alloy of making the filter main body, produce at its afterbody body and can make the filter main body and to be connected wirerope to do the connector of controlled connection, carry wirerope controlledly to transmit, controllable release, accurate location, the burn into of having avoided similar filter in the prior art to adopt unlike material to produce because of connector and filter main body comes off and waits deficiency.Against existing technologies, the present invention is rational in infrastructure, connects simply, reliable, easy for operation, and security performance is high, is a kind of vena cava filter of desirable controllable release.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is that the present invention forms structural representation.
Fig. 2 is I section enlarged diagram among Fig. 1.
Fig. 3 is the cutaway view of Fig. 2.
Fig. 4 is the expansion sketch map of afterbody body among Fig. 2.
The another kind of enlarged diagram of I section among Fig. 5 Fig. 1.
Fig. 6 is that the A-A of Fig. 5 is to cutaway view.
The another kind of enlarged diagram of I section among Fig. 7 Fig. 1.
Fig. 8 is that the B-B of Fig. 7 is to cutaway view.
Label among the figure is: 1. filter main body, 2. carry wirerope, 3. afterbody body, 4. recessed rectangular sheet, 5. drag hook, 6. bolt head, 7. positive stop lug boss, 8. screw mandrel.
The specific embodiment
As can be seen from Figure 1, a kind of vena cava filter of controllable release, it includes filter main body 1, carries wirerope 2 etc.Filter main body 1 has high resiliency by nickel-titanium alloy processing, and it is netted to be spindle.The afterbody body 3 of filter main body 1 is provided with drag hook 5.Carry wirerope 2 front ends to connect a bolt head 6 with screw mandrel 8.
Characteristics of the present invention are also to be provided with some recessed rectangular sheets 4 on the afterbody body 3 of described filter main body 1, and recessed rectangular sheet 4 forms the spirally-guided projection with screw mandrel 8 external screw threads coupling in the afterbody body.Such as Fig. 2, Fig. 5, shown in Figure 7.
Described recessed rectangular sheet 4 on afterbody body 3 along the hand of spiral setting that evenly distributes.Described recessed rectangular sheet 4 can middle directly be compressed into, and is the guide protrusions that is V-shape in the afterbody body, such as Fig. 7, shown in Figure 8.In the frock, by thimble rectangular sheet is pressed in the afterbody body, by heat treatment shaping, several recessed rectangular sheets form the spirally-guided projection with screw mandrel external screw thread coupling in the afterbody body, be equivalent to form helical internal thread.The afterbody body is become to be connected the nut that cooperates with bolt head front end screw mandrel 8.
Described recessed rectangular sheet 4 can be provided with opening, and opening direction has two kinds of circumferential and axial.From Fig. 2, Fig. 3, Fig. 4, can find out, described recessed rectangular sheet 4 circumferentially arranges in afterbody tube body wall upper shed direction, in the frock, by thimble rectangular sheet is pressed in the afterbody body, pass through heat treatment shaping, several recessed rectangular sheets form the spirally-guided projection with screw mandrel external screw thread coupling in the afterbody body, be equivalent to form helical internal thread.The externally threaded groove width of the width of described recessed rectangular sheet and screw mandrel is consistent; The recessed degree of depth of recessed rectangular sheet is identical with the externally threaded groove depth of screw mandrel.The afterbody body is become to be connected the nut that cooperates with bolt head front end screw mandrel.
From Fig. 5, Fig. 6, can find out, described recessed rectangular sheet 4 at afterbody tube body wall upper shed axis of orientation to setting, in the frock, by thimble rectangular sheet is pressed in the afterbody body, pass through heat treatment shaping, several recessed rectangular sheets form the spirally-guided projection with screw mandrel external screw thread coupling in the afterbody body, be equivalent to form helical internal thread.The afterbody body is become to be connected the nut that cooperates with bolt head front end screw mandrel.
The rear portion of bolt head 6 upper screw rods 8 of the present invention is provided with positive stop lug boss 7.Such as Fig. 3, shown in Figure 6.Like this, be convenient to control screw mandrel 8 precession length, avoid excessively entering and cause screwing out inconvenience.
The processing method of the vena cava filter of controllable release of the present invention, it utilizes laser cutting machine, engrave out the main body decorative pattern on the nickel-titanium alloy surface, cut out some rectangular sheets on the nickel-titanium alloy afterbody body hand of spiral, the rear end of afterbody body cuts out drag hook, then produce elastomeric spindle gauze filter main body by heat treatment shaping, rectangular sheet is pressed in the afterbody body simultaneously, pass through heat treatment shaping, in the afterbody body, form some recessed rectangular sheets, to carry the wirerope front end to connect a bolt head with screw mandrel, the spirally-guided projection that some recessed rectangular sheets form in bolt head front end screw mandrel and the afterbody body is connected, realization conveying wirerope is connected with the filter main body, can make things convenient for precession, screw out, consist of the vena cava filter of controllable release.
Recessed rectangular sheet 4 of the present invention evenly distributes along the hand of spiral on afterbody body 3.Utilize laser cutting machine, cut out recessed rectangular sheet 4.Can cut out two seams, recessed rectangular sheet 4 middle parts are directly compressed into, be the guide protrusions that is V-shape in the afterbody body, such as Fig. 7, shown in Figure 8.In the frock, by thimble rectangular sheet is pressed in the afterbody body, by heat treatment shaping, several recessed rectangular sheets form the spirally-guided projection with screw mandrel external screw thread coupling in the afterbody body, be equivalent to form helical internal thread.The afterbody body is become to be connected the nut that cooperates with bolt head front end screw mandrel 8.
The present invention cuts out recessed rectangular sheet 4 also can be provided with opening, and its opening direction has two kinds of circumferential and axial.
Such as Fig. 2, Fig. 3, shown in Figure 4, described recessed rectangular sheet 4 cutting openings direction on the afterbody tube body wall circumferentially arranges.
Such as Fig. 5, shown in Figure 6, described recessed rectangular sheet 4 on the afterbody tube body wall cutting openings axis of orientation to setting.
When the present invention uses, at first bolt head front end screw mandrel is screwed in the afterbody body 3 of filter main body 1, filter main body 1 is connected with bolt head 6 and conveying wirerope 2 by thread forms, by carrying wirerope 2, filter main body 1 is implanted in the postcava.When filter main body 1 is placed to patient's diseased region, can compares and adjust back and forth accurately the location, and can not affect the normal operation of renal veins, can reach the purpose of controllable release.Accurately behind the location, only need unscrew bolt head 6 screw threads, pull out and carry wirerope to get final product.
Directly processing is protruding with the spirally-guided of bolt captacula bar external screw thread coupling on the afterbody body of filter main body in the present invention, it utilizes the nickel-titanium alloy of making the filter main body, directly produce at its afterbody body and can make the filter main body and to be connected wirerope to do the connector of controlled connection, carry wirerope controlledly to transmit, controllable release, accurate location, the burn into of having avoided similar filter in the prior art to adopt unlike material to produce because of connector and filter main body comes off and waits deficiency.The present invention is rational in infrastructure, and connection is simple, reliable, easy for operation, and security performance is high.
Claims (7)
1. the vena cava filter of a controllable release, it includes the filter main body, carries wirerope, carry the wirerope front end to connect a bolt head with screw mandrel, the afterbody body of filter main body is provided with drag hook, it is characterized in that: also be provided with some recessed rectangular sheets on the afterbody body of filter main body, recessed rectangular sheet forms the spirally-guided projection with screw mandrel external screw thread coupling in the afterbody body.
2. the vena cava filter of controllable release according to claim 1 is characterized in that: along the hand of spiral setting that evenly distributes, described recessed rectangular sheet circumferentially arranges in afterbody tube body wall upper shed direction described recessed rectangular sheet on the afterbody body.
3. the vena cava filter of controllable release according to claim 2, it is characterized in that: the externally threaded groove width of the width of described recessed rectangular sheet and screw mandrel is consistent; The recessed degree of depth of recessed rectangular sheet is identical with the externally threaded groove depth of screw mandrel.
4. the vena cava filter of controllable release according to claim 1 is characterized in that: described recessed rectangular sheet on the afterbody body along the hand of spiral setting that evenly distributes, described recessed rectangular sheet at afterbody tube body wall upper shed axis of orientation to setting.
5. the vena cava filter of described controllable release according to claim 1, it is characterized in that: the rear portion of described bolt head upper screw rod is provided with positive stop lug boss.
6. the vena cava filter of described controllable release according to claim 1 is characterized in that: along the hand of spiral setting that evenly distributes, described recessed rectangular sheet is the guide protrusions that is V-shape in the afterbody body to described recessed rectangular sheet on the afterbody body.
7. processing method of the vena cava filter of controllable release as claimed in claim 1, it is characterized in that: utilize laser cutting machine, engrave out the main body decorative pattern on the nickel-titanium alloy surface, cut out some rectangular sheets on the nickel-titanium alloy afterbody body hand of spiral, the rear end of afterbody body cuts out drag hook, then produce elastomeric spindle gauze filter main body by heat treatment shaping, rectangular sheet is pressed in the afterbody body simultaneously, pass through heat treatment shaping, in the afterbody body, form some recessed rectangular sheets, to carry the wirerope front end to connect a bolt head with screw mandrel, the spirally-guided projection that some recessed rectangular sheets form in bolt head front end screw mandrel and the afterbody body is connected, realization conveying wirerope is connected with the filter main body, can make things convenient for precession, screw out, consist of the vena cava filter of controllable release.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110152112 CN102178569B (en) | 2011-06-08 | 2011-06-08 | Controlled release vena cava filter and processing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110152112 CN102178569B (en) | 2011-06-08 | 2011-06-08 | Controlled release vena cava filter and processing method thereof |
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| CN102178569A CN102178569A (en) | 2011-09-14 |
| CN102178569B true CN102178569B (en) | 2013-04-24 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104546220A (en) * | 2013-10-16 | 2015-04-29 | 中国人民解放军总医院 | Recyclable blood vessel filter component |
| CN104352287B (en) * | 2014-10-13 | 2016-09-07 | 深圳市科奕顿生物医疗科技有限公司 | Vena cava filter |
| CN104644287A (en) * | 2015-03-02 | 2015-05-27 | 广州启骏生物科技有限公司 | Inferior vena cava filter and preparation method thereof |
| CN106308974B (en) * | 2015-06-30 | 2018-08-03 | 先健科技(深圳)有限公司 | Filter |
| CN105361974B (en) * | 2015-12-14 | 2018-09-21 | 广东脉搏医疗科技有限公司 | A kind of thrombus filter |
| CN105726158B (en) * | 2016-04-19 | 2017-09-22 | 上海形状记忆合金材料有限公司 | A kind of Weaving type vena cava filter and weaving method |
| WO2017186025A1 (en) * | 2016-04-28 | 2017-11-02 | 深圳市科奕顿生物医疗科技有限公司 | Inferior vena cava filter |
| CN105921746B (en) * | 2016-05-26 | 2017-12-15 | 上海交通大学医学院附属第九人民医院 | One kind is based on elastically-deformable titanium enhancing block and its construction method |
| CN106510897A (en) * | 2016-12-30 | 2017-03-22 | 科塞尔医疗科技（苏州）有限公司 | Thrombus filter capable of stably releasing and preparation method thereof |
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| CN202105046U (en) * | 2011-06-08 | 2012-01-11 | 威海维心医疗设备有限公司 | Controlled release vena cava filter |
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| IT1205735B (en) * | 1986-02-05 | 1989-03-31 | Elconnex Pty Ltd | HERMETIC SEALING OF LIQUIDS, IN PARTICULAR FOR PLASTIC CORRUGATED TUBES |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1195147A1 (en) * | 1994-04-21 | 2002-04-10 | B. Braun Medical SAS,(Société par Actions Simplifiées) | Endovascular blood filter and implantation means |
| CN202105046U (en) * | 2011-06-08 | 2012-01-11 | 威海维心医疗设备有限公司 | Controlled release vena cava filter |
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| CN102178569A (en) | 2011-09-14 |
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