CN207693635U - One kind taking bolt holder and thrombus withdrawing device - Google Patents

Abstract

The utility model is related to internal medicine the field of medical instrument technology more particularly to one kind taking bolt holder and thrombus withdrawing device.One kind taking bolt holder, including：The circumferential rack body expanded self along its longitudinal axis, rack body includes sequentially connected distal portion, middle part and the close end being connected with push rod, distal portion includes the first closed loop net unit, multiple first closed loop net units are interconnected to form tube-in-tube structure, middle part includes multiple second closed loop net units, multiple second closed loop net units are interconnected to form tube-in-tube structure, close end includes multiple third closed loop net units, multiple third closed loop net units are interconnected to form cone cylinder structure, the mesh of first closed loop net unit and the third closed loop net unit is respectively less than the second closed loop net unit.The utility model additionally provides a kind of thrombus withdrawing device.The small mesh of distal portion and close end design, during withdrawing thrombus be not susceptible to displacement, it is not easily to fall off.The big mesh of middle part designs, convenient for thrombus is completely taken out.

Description

One kind taking bolt holder and thrombus withdrawing device

Technical field

The utility model is related to internal medicine the field of medical instrument technology more particularly to one kind, and bolt holder and thrombus to be taken to take out dress It sets.

Background technology

Palsy is also known as apoplexy, and cerebral apoplexy is one group using brain tissue ischemia and heamorrhagic lesions symptom as main clinical manifestation Acute cerebrovascular diseases, because it has the characteristics that high incidence, high mortality, high disability rate, high relapse rate and high financial burden, Seriously endanger public life and health and quality of life.The incidence of China's cerebral apoplexy is just in annual 8.7% speed at present It rises, China becomes the 1st cause of death every year because the number of Stroke Death has been more than tumour and angiocardiopathy.

Palsy is divided into ischemic cerebral apoplexy and two kinds of hemorrhagic apoplexy, wherein cerebral arterial thrombosis accounted for 70% to 80%.In the patient that Ischemic Stroke occurs, the consequence caused by the intracranial vessel occlusion caused by a variety of causes is most tight Weight is the difficult point for the treatment of all the time, and current therapy includes intravenous pharmacy thrombolysis, artery medicine thrombolysis, intravascular machine Tool takes bolt and several method to be used in combination.Artery and vein thrombolysis is the conventional method of acute ischemic stroke treatment, but this Method requires height, strict demand patient idiopathy to rush to hospital in 3~4.5 hours and receive associated treatment therapeutic time window, Also there are many restrictions to drug, and low for the vessel occlusion induced Acute Ischemic Stroke recanalization rate of most serious.

Artery machinery takes pin device to obtain extensive concern because of having the advantages that following many：Quickly lead to again, more Low hemorrhagic conversion rate and palsy intervention time window can extend.Again for the acute ischemic stroke blood vessel caused by vessel occlusion It is connected with satisfactory clinical effectiveness.United States food and drag administration (Food and Drug Administration, FDA Merci Retrieval (2004)) are had approved and Penumbra Stroke Systems are used as the first generation in (2008) Machinery takes pin device.

But at present for machinery takes pin device, problems are still faced during taking bolt：As current takes bolt to fill The working portion set effectively prevent the design of thrombus breaks loose without design, and thrombus during taking bolt is caused to be easy to fall off；Take bolt The compliance of device is all relatively poor, cannot be well adherent with the blood vessel of encephalic complicated bend, causes thrombus to be easy to fall off, and hold Easily make the cerebrovascular that spasm occur；It is only to design single development point to take pin device all, can not judge in art the release of holder with Expansion status is unfavorable for operating during surgical.

Utility model content

The purpose of this utility model is that proposing that one kind taking bolt holder, designed by the small mesh of distal portion, middle part The big mesh of second closed loop net unit designs, and solves when the prior art arrests thrombus that radial support power is smaller, works as rack body The problem of thrombus is easy to fall off when withdrawing.

Another purpose of the utility model is to propose a kind of thrombus withdrawing device, solves the prior art and take pin device Thrombus is easy to fall off when work, and adherence quality and compliance are poor, is easy to cause the problem of spasm occurs for patient's cerebrovascular.

For this purpose, the utility model uses following technical scheme：

One kind taking bolt holder, including：The circumferential rack body expanded self along its longitudinal axis, the rack body include successively Distal portion, middle part and the close end being connected with push rod of connection, the distal portion includes the first closed loop net unit, multiple The first closed loop net unit is interconnected to form tube-in-tube structure, and the middle part includes multiple second closed loop net units, multiple The second closed loop net unit is interconnected to form tube-in-tube structure, and the close end includes multiple third closed loop net units, multiple The third closed loop net unit is interconnected to form cone cylinder structure, the first closed loop net unit and the third closed loop net unit Mesh be respectively less than the second closed loop net unit.

As one of the preferred embodiments of the present invention, the close end is oblique cone cylindrical structure, and oblique cone cartridge type The vertex of structure coincides to the shortest sideline on bottom edge and the extended line of push rod, avoids close end from withdrawing to form the gradient When caliber become smaller.

As one of the preferred embodiments of the present invention, the distal portion and the middle part are spiral cylindrical structure, The cone cylinder structure is screw conic barrel structure, from distal portion to close end according to the spiral first closed loop net connected in sequence of setting Unit, the second closed loop net unit and third closed loop net unit are in counterclockwise or clock wise spirals structure.

As one of the preferred embodiments of the present invention, the close end further include with the axis of rack body in obtuse angle Connecting line, the third closed loop net unit are made of first wave bar, first wave bar and/or connecting line.

As one of the preferred embodiments of the present invention, the first closed loop net unit includes two parallel sinusoidal long waves The bar sinusoidal shortwave bar parallel with two of tail end with the head end for being connected to the sinusoidal shortwave bar, two sinusoidal long wave bars Class quadrilateral structure is enclosed with two sinusoidal shortwave bars；The second closed loop net unit includes two parallel sinusoidal long waves Bar, the connection wave bar being connected to along its length on sinusoidal long wave bar one end and it is connected to the sinusoidal shortwave bar and connection Two parallel sinusoidal shortwave bars at the both ends of wave bar, two sinusoidal long wave bars, two sinusoidal shortwave bars and two connection wave bars Enclose class hexagonal structure.

As one of the preferred embodiments of the present invention, positioned at the outermost sine being connected of the distal portion The intersection point of long wave bar and the sinusoidal shortwave bar is wave head, and the quantity of the wave head is N, the on the cross section of the middle part The quantity of the node of two closed loop net units is n, then N=n-1.

As one of the preferred embodiments of the present invention, the middle part is closed positioned at the second of the same cis-position of helical structure The connecting line of the node of ring-main unit and the angle of horizontal plane where the axis of the rack body are α, the angular range of the α It is 20 ° -80 °.

As one of the preferred embodiments of the present invention, the wall thickness of the rack body is more than the sinusoidal long wave bar, just The width of string shortwave bar and connection wave bar.

As one of the preferred embodiments of the present invention, the width of the sinusoidal long wave bar of the distal portion and sinusoidal shortwave bar More than or equal to the sinusoidal long wave bar of the middle part, sinusoidal shortwave bar and the width for connecting wave bar.

As one of the preferred embodiments of the present invention, the first closed loop net unit includes two-strip structure line, each Structure lines include the sinusoidal long wave bar and coupled sinusoidal shortwave bar, and two join end to end the structure lines connect wherein One is helix structure, another is wave cable architecture, and the helix structure and wave cable architecture distribute alternately；Described The sinusoidal shortwave bar of two closed loop net units is helix structure, and the sine long wave bar and connection wave bar are wave cable architecture；Institute The screw pitch for stating helical structure is 2.0-10.0mm.

A kind of thrombus withdrawing device, including it is described take bolt holder, it is described to take the close end of bolt holder to pass through to fetter point and connect Push rod is connect, the outer cover of the push rod is equipped with and bolt holder can will be taken to be pressed into the microtubular in it, and the microtubular passes through micro- Pipe joint element is connect with sheath is imported；Development structure is also distributed in described take on bolt holder.

Advantageous effect：By the structure for the rack body that distal portion, middle part and close end are constituted, pass through the first of distal portion The small mesh of closed loop net unit designs so that and distal portion generates larger radial support power when release process arrests thrombus, when When rack body is withdrawn, is conducive to drag thrombus, and the thrombus effect not easily to fall off during withdrawing, effectively makes up rack body Middle part second closed loop net unit thrombus when withdrawing be displaced caused by take bolt to fail.Pass through the second of middle part The big mesh of closed loop net unit designs so that rack body can be effectively embedded into inside thrombus when being opened among thrombus, be not easy handle Thrombus shreds or cuts into small shape bulk, convenient for thrombus is completely taken out.Pass through the small net of the third closed loop net unit of close end Hole is designed, and the second closed loop net unit of middle part is effectively made up when withdrawing, the thrombus when withdrawing is avoided to be displaced.Distal portion and The small mesh of close end designs, and is limited to the front side and rear side of thrombus, and cooperation middle part smoothly takes out thrombus.

Description of the drawings

Fig. 1 is the flat deployable structure schematic diagram one for taking bolt holder that the utility model embodiment 1 provides；

Fig. 2 be the utility model embodiment 1 provide take the helical structure of bolt holder in it is clockwise when planar development knot Structure schematic diagram two；

Fig. 3 is the structural schematic diagram of the helical structure for multiple closed loop net units composition that the utility model embodiment 1 provides；

Fig. 4 is the flat deployable structure schematic diagram three for taking bolt holder that the utility model embodiment 1 provides；

Fig. 5 is the structural schematic diagram for the second closed loop net unit that the utility model embodiment 1 provides；

Fig. 6 is the knot for taking flexuosity of the bolt holder in the larger blood vessel of curvature that the utility model embodiment 1 provides Structure schematic diagram；

Fig. 7 be the utility model embodiment 1 provide take bolt rack body in the compression surface side of the larger blood vessel of curvature The structural schematic diagram of closed loop net unit；

Fig. 8 be the utility model embodiment 1 provide take bolt rack body in the extension surface side of the larger blood vessel of curvature The structural schematic diagram of closed loop net unit；

Fig. 9 is the structural schematic diagram of wave head and node that the utility model embodiment 1 provides；

Figure 10 is the structural schematic diagram of the spiral angle α for the helical structure that the utility model embodiment 2 provides；

Figure 11 is the structural schematic diagram for the third closed loop net unit for taking bolt holder that the utility model embodiment 1 provides；

Figure 12 is that the helical structure that the utility model embodiment 1 provides is in the structural representation for taking bolt holder rotated counterclockwise Figure；

Figure 13 is that the bolt rack body profile that takes that the utility model embodiment 1 provides is in cancavo-convex structural schematic diagram one；

Figure 14 be the utility model embodiment 1 provide barrel on have straight line be open or helix opening cross-sectional structure Schematic diagram；

Figure 15 is the structural schematic diagram for the helix structure for taking bolt holder that the utility model embodiment 3 provides；

Figure 16 is the structural schematic diagram one for the thrombus withdrawing device that the utility model embodiment 4 provides；

Figure 17 is the structural schematic diagram two for the thrombus withdrawing device that the utility model embodiment 4 provides；

Figure 18 is that the bolt rack body profile that takes that the utility model embodiment 1 provides is in cancavo-convex structural schematic diagram two；

Figure 19 be the utility model embodiment 1 provide take the close end of bolt holder and the structure of axis of rack body to show It is intended to.

In figure：

100, rack body；110, distal portion；120, middle part；130, close end；201, the first closed loop net unit；202、 Second closed loop net unit；203, third closed-loop element；301, sinusoidal long wave bar；302, sinusoidal shortwave bar；303, wave bar is connected； 304, wave head；305, node；306, connecting line；307, first wave bar；308, the second wave bar；200, push rod；400, sheath is imported Pipe；500, microtubular.

Specific implementation mode

Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.

Embodiment 1

The utility model provide it is a kind of taking bolt holder for thrombus withdrawing device, as shown in Fig. 1,2,4, including：Edge The rack body 100 that its longitudinal axis circumferentially expands self, the rack body 100 include sequentially connected distal portion 110, middle part 120 and the close end 130 that is connected with push rod 200, the distal portion 110 include the first closed loop net unit 201, it is multiple described First closed loop net unit 201 is interconnected to form tube-in-tube structure, and the distal portion 110 is open tube-in-tube structure；The centre Portion 120 includes multiple second closed loop net units 202, and multiple second closed loop net units 202 are interconnected to form tube-in-tube structure, The close end 130 includes multiple third closed loop net units 203, and multiple third closed loop net units 203 are interconnected to form The mesh of cone cylinder structure, the first closed loop net unit 201 and the third closed loop net unit 203 is respectively less than second closed loop Net unit 202.

By the structure for the rack body 100 that distal portion 110, middle part 120 and close end 130 are constituted, pass through distal portion 110 The first closed loop net unit 201 small mesh design so that distal portion 110 generates larger diameter when release process arrests thrombus To support force, be conducive to drag thrombus when rack body 100 is withdrawn, and thrombus is not easily to fall off during withdrawing, effectively more Mend rack body 100 middle part 120 the second thrombus when withdrawing of closed loop net unit 202 be displaced caused by take bolt to lose It loses.Pass through the big mesh design of the second closed loop net unit 202 of middle part 120 so that rack body 100 is opened among thrombus When can be effectively embedded into inside thrombus, be not easy the thrombus to shred or cut into small shape it is blocky, convenient for thrombus is completely taken out.By close The small mesh of the third closed loop net unit 203 of end 130 designs, and the second closed loop net list of middle part 120 is effectively made up when withdrawing Member 202 avoids the thrombus when withdrawing from being displaced.The small mesh of distal portion 110 and close end 130 designs, to the front side of thrombus It is limited with rear side, cooperation middle part 120 smoothly takes out thrombus.

Close end 130 is during withdrawing in order to prevent, and because rack body 100 is influenced by power is withdrawn, whole caliber becomes Small or kink, the close end 130 are oblique cone cylindrical structure, and the vertex of oblique cone cylindrical structure to the shortest side on bottom edge Line and the extended line of push rod 200 coincide, and avoid the caliber when withdrawing of close end 130 from becoming smaller to form the gradient.Oblique cone cylinder The slope design of type structure, which can be obstructed effectively, to be withdrawn power and is transferred in the circumferential direction of entire rack body 100, to avoid thrombus from existing Caducous phenomenon during being withdrawn.Meanwhile the vertex of oblique cone cylindrical structure is to the shortest sideline on bottom edge and push rod 200 extended line coincides, and the tractive force of rack body 100 concentrates on the extended line at 200 place of push rod, ensure that holder The caliber of ontology 100 is constant.The distal portion 110 and middle part 120 of the rack body 100 are its main body, the main body it is outer Portion's shape is cylindrical shape, that is, main body is in the tubular construction of one end open in expansion naturally；The cylindrical shape can be with It is the cylindrical shape that entire outer diameter is consistent, as shown in figure 13, the outer shape of the main body can also be outer diameter variation profile In cancavo-convex structure, by taking the concrete structure of middle part 120 as an example, as can be seen from Figure 18 by the second closed loop net unit 202 The structure of class hexagonal structure helical arrangement is determined that concave-convex difference of the concave-convex structure at middle part 120 is by the second closed loop The high low head h of the highs and lows of net unit 202 is determined.The rest may be inferred, and concave-convex structure is at distal portion 110 Concave-convex difference is determined that concave-convex structure is in proximal end by the high low head h of the highs and lows of the first closed loop net unit 201 Concave-convex difference at portion 130 is determined by the high low head h of the highs and lows of third closed loop net unit 203.The cylinder It is columnar structured that shape structure can be that barrel is closed completely, and as shown in Figure 14, can also be on barrel has straight line to be open or spiral shell Spin line is open columnar structured.

The distal portion 110 and the main body that middle part 120 is rack body 100, are the effective active lengths for taking bolt.Specifically When implementation, distal portion 110 is the 1/2-1/5 of effective active length of rack body 100, and middle part is entire rack body 100 The 1/2-4/5 of effective active length；Close end 130 is the overall length 1/2-1/5 of rack body 100.

Because of the mesh size of the first closed loop net unit 201, the second closed loop net unit 202 and third closed loop net unit 203 The overall radial power of difference, distal portion 110, middle part 120 and close end 130 is different, it is preferred that the distal portion 110 Average radial support force ratio with middle part 120 is 1.1-2.5 times, the average radial of the distal portion 110 and close end 130 Support force ratio is equal or is 1.1-1.5 times.

This radial support power is provided with conducive to rack body 100 after reaching diseased region, and holder 100 is led from micro- It is released in pipe 500,100 both ends of rack body have higher radial support power, are anchored vascular wall and are embedded in thrombus rapidly, reduce The possibility of thrombus escape.The weaker radial support power of middle part 120 is to reduce the excessive stimulation to vascular wall, avoid blood vessel Spasm.By its own the second closed loop net unit 202 and shape-memory material natural resiliency, middle part 120 is at it from micro- It is slowly sprung back after releasing in conduit 500, reduces and shred the risk of thrombus because the radial load of rack body 100 is excessive.This branch Frame structure design not easy damaged blood vessel, ensures the integrality of removal of thromboses, more meets and bolt is taken to perform the operation demand.

It is easy to give a discount to further solve the problems, such as rack body 100 in curved blood vessel, 110 He of the distal portion The middle part 120 is spiral cylindrical structure, and the cone cylinder structure is screw conic barrel structure, as shown in figure 3, from distal portion 110 to close end 130 according to the spiral first closed loop net unit 201 connected in sequence of setting, the second closed loop net unit 202 and the Three closed loop net units 203 are in counterclockwise or clock wise spirals structure.Wherein the first closed loop net unit 201, the second closed loop net unit 202 and third closed loop net unit 203 quantity be at least one, specifically, the first closed loop net unit 201, the second closed loop net The quantity of unit 202 and third closed loop net unit 203 can be respectively adjusted according to specific application environment.

From distal portion 110 to close end 130 according to the spiral first closed loop net unit 201, second connected in sequence of setting Closed loop net unit 202 and third closed loop net unit 203 are in counterclockwise or clock wise spirals structure so that rack body 100 is presented Multiple helical structures being sequentially socketed improve the compliance of rack body 100 and the sticking nature along vascular wall, reduce holder sheet Body 100, to the stimulation of blood vessel, reduces cerebrovascular spasm during taking thrombus.

The structure of closed loop net unit can be common mesh-shape closing structure, the shape of mesh can be circle, diamond shape, The shapes such as hexagon, in the specific implementation, the compliance and patch of the one-piece auger structure of rack body 100 in order to further increase Wall, as shown in fig. 4-5, the first closed loop net unit 201 include two parallel sinusoidal long wave bars 301 and are separately connected In the head end of the sinusoidal shortwave bar 302 sinusoidal shortwave bar 302 parallel with two of tail end, two sinusoidal 301 Hes of long wave bar Two sinusoidal shortwave bars 302 enclose class quadrilateral structure；The second closed loop net unit 202 includes two parallel positive chord lengths Wave bar 301, the connection wave bar 303 being connected to along its length on sinusoidal 301 one end of long wave bar and it is connected to the sine Two parallel sinusoidal shortwave bars 302 of long wave bar 301 and the both ends of connection wave bar 303, two sinusoidal 301, two, long wave bars Sinusoidal shortwave bar 302 and two connection wave bars 303 enclose class hexagonal structure.

As shown in Figure 11, Figure 19, the close end 130 further includes the connecting line with the axis of rack body 100 in obtuse angle 306, it is preferred that the axis of the connecting line 306 and rack body 100 the range of B in obtuse angle be 120 ° -170 °.Described For three closed loop net units 203 there are many structure, the first third closed loop net unit 203 includes two parallel 307 Hes of first wave bar The second wave bar 308 being connected between two first wave bars 307, becomes the structure of class quadrangle, be located at not with connecting line 306 Adjacent region；Second of third closed loop net unit 203 includes two parallel 307,308 and of the second wave bar of first wave bar Part connecting line 306 and/or it include two parallel 308, first wave bars 307 of the second wave bar and part connecting line 306, second of third closed loop net unit 203 is connected with connecting line 306；The third third closed loop net unit 203 includes one 307, second wave bars 308 of first wave bar and connecting line 306 are located at the top of the cone cylinder structure of the close end 130.

The first closed loop net unit being surrounded by by the sinusoidal long wave bar 301, sinusoidal shortwave bar 302 and connection wave bar 303 201 and second closed loop net unit 202 and the third that is surrounded by by first wave bar 307, the second wave bar 308 and connecting line 306 close Ring-main unit 203 is arranged according to spiral way, and rack body 100 can effectively be avoided to twist together in the blood vessel of bending or recessed It falls into, achievees the effect that be effectively embedded into inside thrombus.The sine long wave bar 301, sinusoidal shortwave bar 302 and connection wave bar 303 Length can be adjusted as the case may be.

In the bent state, sinusoidal long wave bar 301, sinusoidal shortwave bar 302 and connection wave bar 303 are not easy rack body 100 Kink or recess, as shown in fig. 6, rack body 100 is in the blood vessel 6 under smaller radius of curvature, the spiral of rack body 100 Barrel structure keeps good.As shown in fig. 7, the second closed loop net unit 202 uses class hexagonal structure, sinusoidal long wave bar 301 When with the compressing surface 601 of blood vessel 6 of the sinusoidal shortwave bar 302 under smaller radius of curvature, wave pole length is according to sine wave curve It is compressed accordingly, while the helical structure belonging to wave bar and extend as far as possible sine long wave bar 301 and sinusoidal shortwave bar 302, this shape for allowing for the second closed loop net unit 202 is pulled, and becomes class regular hexagon structure, even if in bending process In also have preferable compliance and adherence quality, and can well docile on the compressing surface 601 of the larger vascular wall of curvature； In the expanding surface 602 of the blood vessel 6 of smaller radius of curvature, wave pole length is pressed for sinusoidal long wave bar 301 and sinusoidal shortwave bar 302 Effectively extend according to sine wave curve, and sinusoidal long wave bar 301 makes wave as far as possible with the helical structure belonging to sinusoidal shortwave bar 302 Pole length is shunk, and becomes oblique hexagonal structure, ensure that it will not be because elongating in the expanding surface 602 of the blood vessel of smaller radius of curvature And shunk on perpendicular direction with elongating, maintain 602 phase of tube wall expanding surface of the blood vessel 6 larger with curvature of middle part 120 There are preferable compliance and adherence quality when contact.Therefore, the above structure of middle part 120 ensure that rack body 100 to song The package of thrombus in the larger blood vessel 6 of rate it is comprehensive, while reducing its stimulation to blood vessel, take bolt more complete and pacifying Entirely.

When it is implemented, the second mesh closed-loop element 202 of the middle part 120 can be by adjacent in distal portion 110 Two the first mesh closed-loop elements 201 interrupt, and the lenth ratio of the sine long wave bar 301 and sinusoidal shortwave bar 302 can It adjusts, it is preferred that the lenth ratio of the sine long wave bar 301 and sinusoidal shortwave bar 302 is 1:1 or 2:1, then second mesh The area of closed-loop element 202 is 1 times or 2 times of 201 area of the first mesh closed-loop element.

Positioned at the outermost sinusoidal long wave bar 301 being connected of the distal portion 110 and the sinusoidal shortwave bar 302 intersection point is wave head 304, and the quantity of the wave head 304 is N, the second closed loop net list on the cross section of the middle part 120 The quantity of the node 305 of member 202 is that the quantity of n, the N and n can be the same or different, it is preferred that N=n-1 so that remote The structural arrangement of end 110 and middle part 120 is more compact, forms preferable mutual support structure, and wave head 304 and sine are short The connection structure of wave bar 302 has better flexibility.As shown in figure 9, the quantity of the wave head 304 is 3, the middle part The node 305 of second closed loop net unit 202 of 120 main body section is 4.

In order to which rack body 100 is easier to open in thrombus, while being easier to take out thrombus from blood vessel, the branch The wall thickness of frame ontology 100 is more than the width of the sinusoidal long wave bar 301, sinusoidal shortwave bar 302 and connection wave bar 303.Work as holder When thrombi is opened, because the width of sinusoidal long wave bar 301, sinusoidal shortwave bar 302 and connection wave bar 303 is less than holder sheet The wall thickness of body 100 so that sinusoidal long wave bar 301, sinusoidal shortwave bar 302 and connection wave bar 303 are when flicking, because of its unit area Pressure bigger, it is more sharp, it can be cut inside thrombus rapidly in release moment, similar cutter principle；And the wall of rack body 100 The thickness of thick namely sinusoidal long wave bar 301, sinusoidal shortwave bar 302 and connection wave bar 303 is thicker, can be carried when capturing thrombus For larger radial support power, to ensure that the thrombus captured is complete mobile with it.

Further, because middle part 120 is mainly responsible for the thrombus insertion in blood vessel, and distal portion 110 and close end 130 be mainly responsible for the thrombus in blood vessel is arrested and is withdrawn during prevent its fall off, in order to be respectively increased middle part 120, The sinusoidal long wave bar 301 of the efficiency of distal portion 110 and close end 130, the close end 130 and distal portion 110 and sinusoidal shortwave The width of bar 302 is more than or equal to the sinusoidal long wave bar 301 of the middle part 120, sine shortwave bar 302 and connection wave bar 303 Width.Above structure makes middle part 120 that there is better embedded performance, the distal portion 110 and close end 130 to have more It is good to arrest and preventing thrombosis falls off performance.

Because close end 130 is oblique cone tubular and its side view is in slope mouthful shape, the sinusoidal long wave bar of the close end 130 301 are more than the wave bar width of rack body with the wave bar width of sinusoidal shortwave bar 302；Preferable capture ability can be obtained, is made Thrombus stress is more uniformly distributed when must withdraw, and prevents thrombus breaks loose well.Preferably, the first wave bar 307 of the close end 130 Wave bar width with the second wave bar 308 is rack body wave bar i.e. the sinusoidal long wave bar of distal portion 110 and middle part 120 301 and 1.1-1.5 times of width of sinusoidal shortwave bar 302, the wave of the connecting line 306 parallel with axis of the close end 130 The width of bar is 1.1 times -1.5 times of rack body wave bar.Above structure can also be effectively increased the push power for taking bolt holder.

The rack body 100 can be made of niti material or processing of high molecular material, can specifically pass through laser Cutting NiTi tubing forms, and thermal finalization can also be then crimped by laser cut Nitin plank and formed, further can be with NiTi silk material is woven；Or it can also be process using flexible plastic material.

Embodiment 2

As different from Example 1, as shown in Figure 10, in order to further increase middle part 120 open when compliance With the adherence quality with vascular wall, the middle part 120 is located at the node of the second closed loop net unit 202 of the same cis-position of helical structure The angle of horizontal plane is α where the axis of 305 connecting line and the rack body 100, the angular range of the α is 20 °- 80°。

Correspondingly, as a complete helical structure, be connected with the second closed loop net units 202 of one or more the One closed loop net unit 201 and 203 its spiral angle of third closed loop net unit also angle α phase with the second closed loop net unit 202 Match.

Embodiment 3

Unlike embodiment 1 or implementation 2, as shown in figure 15, the first closed loop net unit 201 includes two-strip structure Line, each structure lines include the sinusoidal long wave bar 301 and coupled sinusoidal shortwave bar 302, and two join end to end One of structure lines connect are helix structure a, another is wave cable architecture b, the helix structure a and wave Structure b distributes alternately.Distributed alternately the first closed loop net unit 201 formed by helix structure a and wave cable architecture b, Rack body 100 is improved when by the extruding and compression of vascular wall, there is larger radial support power to remain again simultaneously Exterior contour for vascular wall adherence quality and compliance, with better docile vascular wall simultaneously, guarantee thrombus when withdrawing Completely taken back.Dotted line mark is helix structure in figure, and solid line mark is wavy shaped configuration.

The sinusoidal shortwave bar 302 of the second closed loop net unit 202 is helix structure c, 301 He of sine long wave bar It is wave cable architecture d to connect wave bar 303；Second be made of small part helix structure c and major part wavy shaped configuration d Closed loop net unit 202, when being flicked in the middle part of thrombus, belonging to middle part 120 there is larger radial support power, and it is radial The rate bigger flicked is extended out, can preferably be embedded in thrombus, completely be taken out convenient for thrombus.

Two helix structures of the rack body 100 of the utility model, can be according to the various criterion of rack body 100 The corresponding screw pitch of diameter design.The quantity of the wave head 304 of the smaller then rack body of screw pitch 100 is more, then the mesh of closed loop net unit Area is smaller, and the bending property of integral support ontology 100 is better, but the mesh area as rack body 100 is smaller is unfavorable for Complete thrombus is taken out, thrombus escape easily occurs, increases distal vessels risk.Screw pitch designs the wave head 304 of bigger rack body 100 Quantity it is fewer, the mesh area of rack body 100 is bigger, while its bending property is poorer.But the mesh of rack body 100 Area is larger to be conducive to take out complete thrombus, reduces operation risk.Helix screw pitch design value through test bracket ontology 100 is 2.0-10.0mm, which can meet, takes bolt demand；Preferably, helix screw pitch design value is that 4.0-7.0mm performances are best.

When it is implemented, in order to further increase the ability that distal portion 110 drags thrombus, and while withdrawing anti-tampon The screw pitch of the helix structure of the ability to fall off, the first closed loop net unit 201 and third closed loop net unit 203 is described 0.5 times of the screw pitch of the helix structure of two closed loop net units 202.

It is identical to belong to the helix structure of the same rack body 100 its hand of spiral, be all counter-clockwise helical structure or Person is all clock wise spirals structure.

Embodiment 4

The present embodiment additionally provides a kind of thrombus withdrawing device, as shown in Figure 16-Figure 17, including it is described take bolt holder, Described to take the close end 130 of bolt holder by fettering 800 connection push rod 200 of point, the outer cover of the push rod 200 is equipped with can The microtubular 500 that bolt holder will be taken to be pressed into it, the microtubular 500 are connect by microtubular connector with sheath 400 is imported. The rack body 100 is strapped in push rod 200, and constraint point 800 is solid with the constraint spring of constraint developing ring or the filament winding that develops Fixed, fixed form can be that welding, riveting or pressure are held.Development structure is also distributed in described take on bolt holder, to take bolt When arrest and withdraw process whether there is or not falling off to be observed in real time to thrombus, bolt microtechnique is specifically taken with guidance so that take Bolt is more accurate.

Preparation is taken out carrying out thrombus, rack body 100 is compressed to imports in sheath 400 first, led in advance It crosses importing sheath 400 with microtubular connector to be connected, pushes push rod 200, rack body 100 that can smoothly enter into microtubular In 500 tube chambers, rack body 100 will be delivered to by microtubular 500 determined according to radiography or other diagnostic means later Thrombus position, to form tube chamber so that rack body 100 is discharged in vascular lesion position and can be realized by push rod 200 Push pull maneuver precisely aligns, to be converted between compressive state and release conditions.

When interventional treatment, microtubular 500 is delivered to diseased region, and pass through thrombus, fixed microtubular 500.By pushing away Bar 200 is sent to be pushed into rack body 100, according to thrombus position determined by radiography or other diagnostic means, to withdraw microtubular 500 make rack body be discharged in distal end, discharge the 1/3-1/4 of entire rack body 100, rack body 100 is distally flicking anchor Surely vascular wall is lived, is then slowly pushed forward push rod 200, while withdrawing microtubular 500 under reaction force, discharges microtubular 500 Tension, repeatedly until all release of rack body 100.

Due to the elasticity and method for releasing collective effect of shape-memory material, take bolt holder that can be completely embedded into thrombus Portion.It waits for after a certain period of time, push rod of pulling back bar 200 withdraws and bolt holder is taken to capture thrombus, until bolt holder will be taken to be led together with micro- Pipe 500 is withdrawn together to be withdrawn from vitro, and completion entirely takes bolt process.Rack body 100 as a whole is held by pressure and imports sheath 400 It is interior, it is then introduced into microtubular 500, that is, rack body 100 is delivered to diseased region by microtubular 500.

In conclusion the structure for the rack body 100 being made of distal portion 110, middle part 120 and close end 130, passes through The small mesh of first closed loop net unit 201 of distal portion 110 designs so that distal portion 110 is produced when release process arrests thrombus Raw larger radial support power is conducive to drag thrombus when rack body 100 is withdrawn, and thrombus is not easy to take off during withdrawing It falls, the second thrombus when withdrawing of closed loop net unit 202 for effectively making up the middle part 120 of rack body 100 is displaced and is led What is caused takes bolt to fail.Pass through the big mesh design of the second closed loop net unit 202 of middle part 120 so that rack body 100 exists It can be effectively embedded into inside thrombus when being opened among thrombus, be not easy thrombus to shred or cut into small shape bulk, convenient for thrombus is complete Whole taking-up.By the small mesh design of the third closed loop net unit 203 of close end 130, middle part 120 is effectively made up when withdrawing Second thrombus when withdrawing of closed loop net unit 202 is displaced.The small mesh of distal portion 110 and close end 130 designs, to blood The front side of bolt and rear side are limited, and cooperation middle part 120 smoothly takes out thrombus.

The technical principle of the utility model is described above in association with specific embodiment.These descriptions are intended merely to explain this reality With novel principle, and it cannot be construed to the limitation to scope of protection of the utility model in any way.Based on the explanation herein, Those skilled in the art would not require any inventive effort the other specific implementation modes that can associate the utility model, These modes are fallen within the scope of protection of the utility model.

Claims (11)

1. one kind taking bolt holder, which is characterized in that including：The circumferential rack body (100) expanded self along its longitudinal axis, the branch Frame ontology (100) includes sequentially connected distal portion (110), middle part (120) and the close end being connected with push rod (200) (130), the distal portion (110) includes the first closed loop net unit (201), and multiple first closed loop net units (201) are mutual Connection forms tube-in-tube structure, and the middle part (120) includes multiple second closed loop net units (202), multiple second closed loops Net unit (202) is interconnected to form tube-in-tube structure, and the close end (130) includes multiple third closed loop net units (203), more A third closed loop net unit (203) is interconnected to form cone cylinder structure, the first closed loop net unit (201) and described The mesh of three closed loop net units (203) is respectively less than the second closed loop net unit (202).

2. according to claim 1 take bolt holder, which is characterized in that the close end (130) is oblique cone cylindrical structure, And the vertex of oblique cone cylindrical structure coincides to the shortest sideline on bottom edge and the extended line of push rod (200), to form slope Degree avoids close end (130) caliber when withdrawing from becoming smaller.

3. according to claim 1 take bolt holder, which is characterized in that the distal portion (110) and the middle part (120) It is spiral cylindrical structure, the cone cylinder structure is screw conic barrel structure, from distal portion (110) to close end (130) according to setting Fixed spiral first closed loop net unit (201), the second closed loop net unit (202) and third closed loop net unit connected in sequence (203) it is in counterclockwise or clock wise spirals structure.

4. according to claim 1 take bolt holder, which is characterized in that the close end (130) further includes and rack body (100) connecting line (306) of axis in obtuse angle, the third closed loop net unit (203) is by (307) second wave bar of first wave bar (308) and/or connecting line (306) forms.

5. taking bolt holder according to claim 1-4 any one of them, which is characterized in that the first closed loop net unit (201) Including two parallel sinusoidal long wave bars (301) and be connected to the sinusoidal long wave bar (301) head end and tail end two A parallel sinusoidal shortwave bar (302), two sinusoidal long wave bars (301) and two sinusoidal shortwave bars (302) enclose four side of class Shape structure；The second closed loop net unit (202) includes two parallel sinusoidal long wave bars (301), is connected to along its length It connection wave bar (303) on sinusoidal long wave bar (301) one end and is connected to the sinusoidal long wave bar (301) and connects wave bar (303) two parallel sinusoidal shortwave bars (302) at both ends, two sinusoidal long wave bars (301), two sinusoidal shortwave bars (302) and two connection wave bars (303) enclose class hexagonal structure.

6. according to claim 5 take bolt holder, which is characterized in that be located at the outermost phase of the distal portion (110) The sinusoidal long wave bar (301) of connection and the intersection point of the sinusoidal shortwave bar (302) are wave head (304), the wave head (304) Quantity be N, the quantity of the node (305) of the second closed loop net unit (202) on the cross section of the middle part (120) is n, Then N=n-1.

7. according to claim 6 take bolt holder, which is characterized in that the middle part (120) be located at helical structure it is same The connecting line of the node (305) of second closed loop net unit (202) of one cis-position and water where the axis of the rack body (100) The angle of plane is α, and the angular range of the α is 20 ° -80 °.

8. according to claim 5 take bolt holder, which is characterized in that the wall thickness of the rack body (100) is more than described The width of sinusoidal long wave bar (301), sinusoidal shortwave bar (302) and connection wave bar (303).

9. according to claim 5 take bolt holder, which is characterized in that the sinusoidal long wave bar (301) of the distal portion (110) It is more than or equal to the sinusoidal long wave bar (301) of the middle part (120), sinusoidal shortwave bar with the width of sinusoidal shortwave bar (302) (302) and connection wave bar (303) width.

10. according to claim 9 take bolt holder, which is characterized in that the first closed loop net unit (201) includes two Structure lines, each structure lines include the sinusoidal long wave bar (301) and coupled sinusoidal shortwave bar (302), two One of the structure lines connect that join end to end be helix structure, another be wave cable architecture, the helix structure and Wave cable architecture distributes alternately；The sinusoidal shortwave bar (302) of the second closed loop net unit (202) is helix structure, described Sinusoidal long wave bar (301) and connection wave bar (303) are wave cable architecture；The screw pitch of the helical structure is 2.0-10.0mm.

11. a kind of thrombus withdrawing device, which is characterized in that take bolt holder, institute including such as claim 1-10 any one of them It states and the close end (130) of bolt holder is taken to connect push rod (200), the outer cover of the push rod (200) by fettering point (800) Equipped with bolt holder can will be taken to be pressed into the microtubular in it (500), the microtubular (500) passes through microtubular connector and importing sheath Manage (400) connection；Development structure is also distributed in described take on bolt holder.