CN208864415U - Machinery takes bolt bracket and thrombus withdrawing device - Google Patents

Abstract

The utility model belongs to the field of medical instrument technology, bolt bracket and thrombus withdrawing device are taken more particularly to a kind of machinery, including the net tubular stent body connected by multiple mesh, the rack body includes integral molding and the proximal part for being smoothly connected transition, intermediate body portion and distal portions, rack body folds under external force, external force discharges after eliminating to be restored, in subtriangular after the tiling expansion of rack body proximal part, in approximate rectangular after intermediate body portion tiling expansion, it is trapezoidal in approximate right angle after distal portions tiling expansion, one jiao by distal portions tail portion oblique waist side of rack body is starting point, setting treatment after whole curling horizontal along longitudinal direction, the rack body proximal part is in nearly small long-range cone structure under release conditions, intermediate body portions are divided into cylindrical-shaped structure, the cylindrical mesh structure of distal portions.The anti-tampon escape of the utility model energy, improves thrombus and arrests rate, improve patient clinical prognosis, improve patients ' life quality.

Description

Machinery takes bolt bracket and thrombus withdrawing device

Technical field

The utility model belongs to the field of medical instrument technology, takes bolt bracket and thrombus to take out dress more particularly to a kind of machinery It sets.

Background technique

Thrombus be in pathological conditions blood on the endocardial of cardiovascular system or the surface in heart exterior blood vessel somewhere It is formed by sludged blood, is generally made of red blood cell, fibrin, blood platelet, leucocyte etc. by different proportion.By in the cerebrovascular Thrombus caused by ishemic stroke be the refractory disease for seriously endangering human health and life security, according to statistics, China is every Patient with cerebral apoplexy occurs year up to 3,000,000, annual stroke patient dead 1,200,000, the disease incidence of China's cerebral apoplexy is just with annual at present 8.7% speed rises, and China becomes first cause every year because the number of Stroke Death has been more than tumour and cardiovascular disease Dead reason.Artery and vein thrombolysis is the conventional method of acute ischemic stroke treatment, but this method is for the requirement of therapeutic time window Height is strict with and is inscribed within patient's idiopathy 4.5 hours treated, and so short thrombolysis time window causes only less than 10% Patient can obtain effective thromboembolism treatment, also have many restrictions to the selection of patient, some patient in time window It is left out, and low for the vessel occlusion induced Acute Ischemic Stroke recanalization rate of most serious, drug thrombolysis It is substantially invalid for the thrombus greater than 8mm.Therefore, effect is poor after treatment, stays disability more, and life is rough to take care of oneself into acute ischemia Property patients with cerebral apoplexy and its family must in face of the problem of.In order to solve the problems, such as said medicine thrombolysis, mechanically cutting thrombus The method of (Mechanical Thrombectomy) has become research hotspot in recent years.For acute caused by vessel occlusion Ischemic Stroke revascularization has satisfactory clinical effectiveness.Artery machinery take pin device because have the advantages that it is many and It obtains extensive concern: quickly leading to again, lower hemorrhagic conversion rate and extensible stroke interventional time window.At present The patient's time window screened based on image is extended to 16 hours by the research of DEFUSE 3, and DAWN research will even be screened based on image Patient's time window extended 24 hours, " U.S. AHA/ASA acute apoplexy Early postoperative management guide " of newest publication with The evidence of highest level recommends 6-16 hours takes bolt to treat, and is recommended 6-24 hours with the evidence of B-R rank and bolt is taken to control It treats.

Currently, U.S. FDA approved Merci takes bolt device (2004) and Penumbra system (2008) Solitaire blood flow reconstructing apparatus (2012) and Trevo take the machinery of pin device (2012) for acute ischemic stroke to take Bolt treatment.But at present for machinery takes pin device, problems are still faced during taking bolt: as taken pin device mostly Design development point is less, and the contact situation for taking pin device with thrombus can neither be clearly observed during taking bolt, can not be defined The position of thrombus and form cause thrombus to arrest rate low.And existing apparatus model is fixed, stent mesh size and composition bracket The diameter of nitinol alloy wire be also fixed and invariable between different model and in the same bracket, will lead to radial direction in this way Support force is fixed, and does not adapt to the specific requirement of cerebrovascular system blood vessel different-diameter and different anatomic position, to will lead to Take bolt failure and damage vascular wall.And the emphasis and difficult point of acute apoplexy endovascular method are that the surgical procedure institute With taking bolt instrument to capture and how to avoid the operating process of damage in to(for) vascular wall to the crawl of thrombus, because vascular wall Damage will lead to occluding again for blood vessel, to keep clinical outcome bad.

Summary of the invention

The technical problems to be solved in the utility model is exactly to overcome above-mentioned the deficiencies in the prior art, and providing one kind can prevent Tampon escape, so that thrombus arrests rate height, and the good machinery of clinical outcome takes bolt bracket and thrombus withdrawing device.

In order to solve the above technical problems, the technical solution adopted by the utility model is:

It designs a kind of machinery and takes bolt bracket, including the net tubular stent body being formed by connecting by multiple mesh, the bracket sheet Body includes integral molding and the proximal part, intermediate body portion and distal portions for being smoothly connected transition, and rack body is outside It being folded under power effect, external force discharges after eliminating to be restored, in subtriangular after rack body proximal part tiling expansion, in Between after main part tiling expansion in approximate rectangular, it is trapezoidal in approximate right angle after distal portions tiling expansion, the rack body by One jiao of the tail portion oblique waist side of distal portions is starting point, and setting treatment after whole curling horizontal along longitudinal direction in the released state should Rack body proximal part is in nearly small long-range cone structure, and intermediate body portions are divided into cylindrical-shaped structure, and distal portions are in cylinder Shape mesh structure.

Preferably, it is taken in bolt bracket in above-mentioned machinery, the mesh of the rack body distal portions is than proximal part in Between main part mesh size it is big；The material diameter of the rack body distal portions is than proximal part and intermediate body portion Material diameter it is thin.

Preferably, it takes in bolt bracket in above-mentioned machinery, along the mesh, is successively laid by the proximal end of rack body to distal end There are multiple developing marks, makes its entirety that there is developability.

Preferably, it is taken in bolt bracket in above-mentioned machinery, each developing mark is along the mesh in continuous or interval dislocation point Cloth.

Preferably, it is taken in bolt bracket in above-mentioned machinery, the rack body is the metal material with shape memory effect Or there is elastomeric high molecular material heat treatment shaping to form.

Preferably, it is taken in bolt bracket in above-mentioned machinery, is in shuttle shape at the proximal openings of the rack body.

In addition, also designing a kind of thrombus withdrawing device, bolt bracket is taken including as above any machinery, wherein bracket sheet The proximal end of body is connected with push-and-pull seal wire, and rack body is can be recycled under push-and-pull seal wire effect to taking in bolt microtubular when work.

In above-mentioned technical proposal, wherein " distal end " and " proximal end " is from the direction of operative doctor, wherein " distal end " It is one end far from operative doctor, correspondingly, " proximal end " is proximate to one end of operative doctor.

The working principle of the utility model is:

The utility model thrombus withdrawing device by taking bolt microtubular to be delivered at thrombus when work carries out that bolt is taken to operate When release expansion, thrombus is lived by the mesh inlay card of rack body intermediate body portion, a part of bracket is recycled later, makes bracket Stronger fixes thrombus, and combines the cylindric mesh structure of distal portions, thus filter thrombus and prevent its escape, Bolt bracket is taken to take out under negative-pressure ward together with microtubular later.

The advantageous effects of technical solutions of the utility model are:

1, in structure, the utility model machinery takes bolt bracket and thrombus withdrawing device by by the distal portion of rack body Set up separately trapezoidal in approximate right angle after being calculated as tiling expansion, and is cylindric mesh structure under release conditions, among rack body After the mesh inlay card of main part lives thrombus, in conjunction with the cylindric mesh structure of distal portions, to effectively filter thrombus and prevent Only it is escaped.Thus thrombus arrests rate height, can improve clinical prognosis, improves patients ' life quality.

2, in structure, even if the distal portions of rack body are designed as after tiling expansion in approximate straight by the utility model Angle is trapezoidal, i.e. distal portions cross-sectional area of nearer end part and intermediate body portion after tiling expansion is big, due to bracket sheet The mesh size of body distal portions is big compared with other parts mesh size, and the material diameter of the part is also straight compared with other parts material Diameter is thin, and so, after curling, shaping under release conditions, space and volume occupied by distal portions accordingly reduce, distal portions No matter in the released state the volume of volume itself and rack body other parts, or is being recycled to the mistake taken in bolt microtubular Cheng Zhong is substantially able to maintain unanimously, thus after capable of also guaranteeing the processing of rack body entirety curling, shaping, in the course of work, It can smoothly be recycled to and take in bolt microtubular under push-and-pull seal wire effect when the distal portions release conditions of rack body.

3, in structure, the mesh size of rack body distal portions is compared with other parts mesh size contained by the utility model Greatly, the material diameter of the part is thin compared with other parts material diameter, make rack body along longitudinal direction different location surface radially prop up Support force is adjustable, so that the different-diameter blood vessel in cerebrovascular system and the specific requirement of different anatomic position are adapted to, so as to Smoothly embolus is taken out.Simultaneously it is also possible that the radial support power of rack body distal portions weakens, to avoid damaging as far as possible Blood trouble tube wall, thus clinical outcome is good.

4, in structure, the utility model is marked by proximal end to a certain number of developments of distal end whole installation on taking bolt bracket Remember point, the contact situation for taking pin device with thrombus can neither clearly be observed during taking bolt by efficiently solving, and cannot be bright The technical issues of position of true thrombus and form, to be conducive to take the operation of bolt process and then further improve thrombus to arrest Rate.

Detailed description of the invention

Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing, in which:

Fig. 1 is the structural schematic diagram that the utility model machinery takes bolt bracket (for the unfolded state that tiles)；

Fig. 2 is the structural schematic diagram that the utility model machinery takes bolt bracket (for release conditions after curling)；

Fig. 3 is the transversal cross-section structural schematic diagram of distal portions shown in Fig. 2；

Fig. 4 is the longitudinal profile structure schematic of distal portions shown in Fig. 2；

Fig. 5 is the structural schematic diagram of the utility model thrombus withdrawing device (rack body is release conditions)；

Fig. 6 is the structural schematic diagram of the utility model thrombus withdrawing device (rack body is collapse state)；

Fig. 7 is the schematic diagram that the utility model thrombus withdrawing device takes bolt process status one；

Fig. 8 is the schematic diagram that the utility model thrombus withdrawing device takes bolt process status two；

Serial number in figure: 100, rack body；

101, proximal part；

102, distal portions；

103, at proximal openings；

104, mesh；

105, intermediate body portion

200, developing mark；

300, seal wire is pushed and pulled；

400, bolt microtubular is taken；

500, blood vessel；

600, thrombus.

Specific embodiment

Below in conjunction with the attached drawing in the utility model, the technical scheme in the embodiment of the utility model is carried out clearly complete Whole description, it is clear that described embodiment is only the schematical part specific embodiment of the utility model, not to limit Determine the scope of the utility model, any those skilled in the art is not departing from the utility model conceptions and principles under the premise of institute The equivalent changes and modifications made should belong to the range of the utility model protection.

Embodiment one:

Referring to Fig. 1-4, in figure, the utility model machinery takes bolt bracket, including the network management being formed by connecting by multiple mesh 104 Shape rack body 100, the rack body include integral molding and proximal part 101, the intermediate body portions for being smoothly connected transition Divide 105 and distal portions 102, rack body folds under external force, and external force discharges after eliminating to be restored, and in the released state should Rack body proximal part is in nearly small long-range cone structure, and intermediate body portions are divided into cylindrical-shaped structure, and distal portions are in cylinder Shape mesh structure；Proximal part is in subtriangular after rack body tiling expansion, in close after intermediate body portion tiling expansion It is trapezoidal in approximate right angle after distal portions tiling expansion like rectangle.103 be in shuttle shape at the proximal openings of rack body.The bracket Ontology is using the metal material with shape memory effect or has elastomeric macromolecule shape material, by its distal portions One jiao of tail portion oblique waist side be starting point, setting treatment forms after whole curling horizontal along longitudinal direction.

The utility model is trapezoidal in approximate right angle after tiling expansion by being designed as the distal portions of rack body, and releases Putting is cylindric mesh structure under state, after the mesh inlay card of rack body intermediate body portion lives thrombus, in conjunction with distal portion The cylindric mesh structure divided, to effectively filter thrombus and prevent its escape.Thus thrombus arrests rate height, clinical outcome It is good.

Embodiment two:

The present embodiment figure is not drawn into.The present embodiment machinery takes bolt bracket similar to one structure of embodiment, structure identical portions Divide and no longer repeat herein, difference is: the mesh of the rack body distal portions of the present embodiment is than proximal part and centre master The mesh size of body portion is big；The material diameter of rack body distal portions is more straight than the material of proximal part and intermediate body portion Diameter is thin.

Relative to embodiment one, even if the present embodiment distal portions nearer end part and intermediate body portions after tiling expansion The cross-sectional area divided is big, since the mesh size of rack body distal portions is big compared with other parts mesh size, and the part Material diameter is also thin compared with other parts material diameter, so, after curling, shaping under release conditions, sky occupied by distal portions Between and volume accordingly reduce, so as to guarantee rack body entirety curling, shaping processing after, in the course of work, rack body It can smoothly be recycled to and take in bolt microtubular under push-and-pull seal wire effect when distal portions release conditions, thus structure design is more closed Reason.

In addition, the mesh size of rack body distal portions is big compared with other parts mesh size, and the material of the part is straight Diameter is thin compared with other parts material diameter, keeps the surface radial support power of rack body different location along longitudinal direction adjustable, to adapt to The specific requirement of different-diameter blood vessel and different anatomic position in cerebrovascular system, so as to smoothly take out embolus.Together When be also possible that the radial support power of rack body distal portions weakens, to avoid damage to vascular wall as far as possible, thus clinical Outcome is good.

Embodiment three:

Referring to Fig. 1-2, in figure, the present embodiment is similar to one structure of embodiment, and it is identical to represent meaning for identical number in figure, This is no longer repeated, and difference is: the present embodiment is more to being distally successively laid with by the proximal end of rack body along each mesh 104 A developing mark 200, makes its entirety have developability.Moreover, each developing mark is along each mesh in continuously distributed.Certainly according to need It wants, is also possible to interval and is dislocatedly distributed.

Relative to embodiment one, the present embodiment is on taking bolt bracket by proximal end to a certain number of developments of distal end whole installation Mark point, the contact situation for taking pin device with thrombus can neither clearly be observed during taking bolt by efficiently solving, and cannot The technical issues of specifying position and the form of thrombus is grabbed to be conducive to take the operation of bolt process and then further improve thrombus Catch rate.

Example IV~six:

Referring to Fig. 5-6, in figure, four~six thrombus withdrawing device of the present embodiment is respectively included described in embodiment one~tri- Machinery take bolt bracket, push-and-pull seal wire 300 and take bolt microtubular 400 etc..Push-and-pull seal wire is connected in the proximal end of rack body 100 300, push-and-pull seal wire surface is set with and takes bolt microtubular 400, and rack body can be recycled that bolt is micro- to lead to taking under push-and-pull seal wire effect In pipe.The specific structure of bolt bracket is taken to distinguish detailed in Example one~tri- about contained machinery in the present embodiment four~six, herein No longer repeat.

When specific works, referring to Fig. 7, bolt microtubular is taken to be transported to 600 position of thrombus along blood vessel 500 by micro-wire Place, microtubular end are located at the distal side of thrombus, bolt bracket will be taken to be delivered to thrombus institute in place by microtubular when which works It sets.Referring to Fig. 8, bolt bracket will be taken to be delivered to its distal end by microtubular, and withdraw microtubular later and resist and take outside bolt support body Operating side facility prevents it from dropping back together movement with microtubular, is unfolded so that bolt bracket is taken to discharge just in thrombus site, complete Full inlay card lives thrombus.A part of bracket is recycled later, makes the fixation thrombus that bracket is stronger, and combine the cylinder of distal portions Shape mesh structure filters thrombus and prevents its escape, bolt bracket is taken to take out under negative-pressure ward together with microtubular later.

Each embodiment in this specification is described in a progressive manner, what each embodiment stressed be and its The difference of its embodiment, same and similar part is cross-referenced between each embodiment.

To the above description of disclosed embodiment, those skilled in the art is made to can be realized or use the utility model.It is right The many places modification of these embodiments is apparent to those skilled in the art, and the general principles defined herein can Realized under the premise of not departing from the spirit or scope of utility model in other embodiments.Therefore, the utility model will not These embodiments illustrated herein are limited to, and are to fit to the most wide model consistent with principles disclosed herein and features of novelty It encloses.

Claims (7)

1. a kind of machinery takes bolt bracket, including the net tubular stent body being formed by connecting by multiple mesh, which includes Integral molding and the proximal part, intermediate body portion and distal portions for being smoothly connected transition, rack body is in external force Under fold, external force discharges after eliminating to be restored, it is characterized in that: in approximate triangle after rack body proximal part tiling expansion Shape, in approximate rectangular, bracket sheet trapezoidal in approximate right angle after distal portions tiling expansion after intermediate body portion tiling expansion Body is starting point by one jiao of the tail portion oblique waist side of distal portions, setting treatment after whole curling horizontal along longitudinal direction, in release conditions The lower rack body proximal part is in nearly small long-range cone structure, and intermediate body portions are divided into cylindrical-shaped structure, and distal portions are in Cylindric mesh structure.

2. machinery according to claim 1 takes bolt bracket, it is characterized in that: the mesh of the rack body distal portions is than close The mesh size of end part and intermediate body portion is big；The material diameter of the rack body distal portions is than proximal part in Between main part material diameter it is thin.

3. machinery according to claim 1 takes bolt bracket, it is characterized in that: along the mesh, by rack body proximal end to Distal end is successively laid with multiple developing marks.

4. machinery according to claim 3 takes bolt bracket, it is characterized in that: each developing mark along the mesh in continuous or Interval is dislocatedly distributed.

5. machinery according to claim 1 takes bolt bracket, it is characterized in that: the rack body is with shape memory effect Metal material or have elastomeric high molecular material heat treatment shaping form.

6. machinery according to claim 1 takes bolt bracket, it is characterized in that: being in shuttle at the proximal openings of the rack body Shape.

7. a kind of thrombus withdrawing device, including such as machinery as claimed in any one of claims 1 to 6 take bolt bracket, wherein bracket sheet The proximal end of body is connected with push-and-pull seal wire, and rack body is can be recycled under push-and-pull seal wire effect to taking in bolt microtubular when work.