CN108742774A - A kind of double-layer structure takes pin device - Google Patents
A kind of double-layer structure takes pin device Download PDFInfo
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- CN108742774A CN108742774A CN201810718417.XA CN201810718417A CN108742774A CN 108742774 A CN108742774 A CN 108742774A CN 201810718417 A CN201810718417 A CN 201810718417A CN 108742774 A CN108742774 A CN 108742774A
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- support
- pin device
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- push rod
- layer structure
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- 238000011161 development Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 5
- 208000007536 Thrombosis Diseases 0.000 abstract description 36
- 230000004888 barrier function Effects 0.000 abstract description 11
- 239000003814 drug Substances 0.000 abstract description 5
- 230000001225 therapeutic effect Effects 0.000 abstract description 5
- 208000005189 Embolism Diseases 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 210000004204 blood vessel Anatomy 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- 208000006011 Stroke Diseases 0.000 description 7
- 206010008190 Cerebrovascular accident Diseases 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 208000032382 Ischaemic stroke Diseases 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 206010033799 Paralysis Diseases 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 239000008280 blood Substances 0.000 description 3
- 210000004369 blood Anatomy 0.000 description 3
- 230000017531 blood circulation Effects 0.000 description 3
- 230000002490 cerebral effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 208000021090 palsy Diseases 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002537 thrombolytic effect Effects 0.000 description 3
- 230000001464 adherent effect Effects 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000002008 hemorrhagic effect Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000002792 vascular Effects 0.000 description 2
- 206010008092 Cerebral artery thrombosis Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000005013 brain tissue Anatomy 0.000 description 1
- 208000026106 cerebrovascular disease Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011461 current therapy Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007917 intracranial administration Methods 0.000 description 1
- 238000001990 intravenous administration Methods 0.000 description 1
- 208000028867 ischemia Diseases 0.000 description 1
- 230000000302 ischemic effect Effects 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- -1 platinoiridita Chemical compound 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- ZONODCCBXBRQEZ-UHFFFAOYSA-N platinum tungsten Chemical compound [W].[Pt] ZONODCCBXBRQEZ-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00743—Type of operation; Specification of treatment sites
- A61B2017/00778—Operations on blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22038—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with a guide wire
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22094—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for for crossing total occlusions, i.e. piercing
Abstract
Pin device is taken the present invention relates to internal medicine the field of medical instrument technology more particularly to a kind of double-layer structure, including takes bolt holder, push rod and microtubular；It includes first support and second support to take bolt holder, first support is located at the inside of second support, the close end of first support and the close end of second support are connect by fettering point with push rod, the distal portion of first support or the whole distal end end face for protruding from second support, and the maximum gauge of the protrusion of first support is more than or equal to the diameter of second support.By being to protrude from the distal end end face of second support by the distal portion of first support or whole installation, and the maximum gauge of the protrusion of first support is set greater than the diameter equal to second support, so that forming barrier space between the protrusion and the distal end end face of second support of first support, when taking pin device to withdraw, the barrier space can stop free thrombosis, thrombus breaks loose is avoided, to avoid secondary embolism, improves therapeutic effect.
Description
Technical field
Pin device is taken the present invention relates to internal medicine the field of medical instrument technology more particularly to a kind of double-layer structure.
Background technology
Palsy is also known as apoplexy, and cerebral apoplexy is a kind of 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 first 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.
Intravascular machinery takes pin device to obtain extensive concern because of having the advantages that following many：Quickly lead to again,
Lower hemorrhagic conversion rate and palsy intervention time window can extend.For the acute ischemic stroke blood vessel caused by vessel occlusion
It is connected with satisfactory clinical effectiveness again.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, Fig. 1 shows biography
System take pin device in the blood vessel take bolt situation, as shown in Figure 1, after taking bolt holder 10 ' discharge in blood vessel 100 expansion opening blood
Pipe 100, thrombus 200 are taken the mesh of bolt holder 10 ' press-fitted, and broken thrombus 200 certain at this time can be by taking bolt holder 10 '
Mesh, which enters to take, forms free state inside bolt holder 10 ', also some thrombus 200 are taken bolt holder 10 ' to be compressed on vascular wall,
But it could not simultaneously be press-fitted completely securely.It is embedded under the action of forward blood flow to take bolt branch when edge, which withdraws direction pulling, takes pin device
The internal thrombus 200 of frame 10 ' can in the opposite direction be moved with the thrombus 200 for failing securely to be press-fitted towards the side of withdrawing, to take
Pin device loses the effect of arresting to this kind of thrombus 200, directly results in thrombus breaks loose, and the thrombus 200 to fall off can float towards distal end blood
Pipe causes secondary embolism, greatly reduces therapeutic effect.
Therefore, pin device is taken to solve the above technical problems there is an urgent need for a kind of double-layer structure.
Invention content
Pin device is taken the purpose of the present invention is to provide a kind of double-layer structure, to solve thrombus existing in the prior art
It is easy to fall off and cause distal vessels again embolism the problem of.
For this purpose, the present invention uses following technical scheme：
A kind of double-layer structure takes pin device, including takes bolt holder, push rod and microtubular；It is described that take bolt holder include the
One holder and second support, the first support are located at the inside of the second support, the close end of the first support and institute
The close end for stating second support is connect by fettering point with the push rod, the distal portion of the first support or whole prominent
In the distal end end face of the second support, and the maximum gauge of the protrusion of the first support is more than or equal to described second
The diameter of frame.
The distal end end face of second support is protruded from by being by the distal portion of first support or whole installation, and by first
The diameter of the protrusion of frame is set as gradually increasing along proximal end to distal direction so that the protrusion of first support and second
Barrier space is formed between the distal end end face of holder, when taking pin device to withdraw, which can be to free thrombus shape
At blocking, thrombus breaks loose is avoided, to avoid secondary embolism, improves therapeutic effect.
As the optimal technical scheme for taking pin device of double-layer structure, the close end of the first support with described second
The close end of frame is connect by same constraint point with the push rod, and the distal portion of the first support protrudes from described second
The distal end end face of frame.
As the optimal technical scheme for taking pin device of double-layer structure, the push rod is through to the interior of the second support
The close end in portion, the second support is connect by the first constraint point with the push rod, and the close end of the first support is logical
It crosses one end that the second constraint point is through to the push rod inside the second support to connect, the distal portion of the first support
Protrude from the distal end end face of the second support.
As the optimal technical scheme for taking pin device of double-layer structure, the push rod runs through the entire second support,
The close end of the second support is connect by the first constraint point with the push rod, and the close end of the first support passes through the
One end that 2 constraint points are through to the push rod outside the second support distal end is connect, and the first support integrally protrudes from
The distal end end face of the second support.
As the optimal technical scheme for taking pin device of double-layer structure, the mesh area of the second support is described first
2-5 times of the mesh area of holder.
As the optimal technical scheme for taking pin device of double-layer structure, the diameter of the protrusion of first support is stated along proximal end
Gradually increase to distal direction.
As the optimal technical scheme for taking pin device of double-layer structure, the protrusion of the first support is enclosed with high score
Sub- film is provided with micropore on the polymeric membrane.
As the optimal technical scheme for taking pin device of double-layer structure, the proximal end of the second support is closed, distal end
It is open.
As the optimal technical scheme for taking pin device of double-layer structure, the proximal end of the first support is closed, distal end
It is open or closed.
As the optimal technical scheme for taking pin device of double-layer structure, the distal end end face of the first support is provided with development
Target seeker.
The advantageous effect of the present invention compared with the prior art：
Double-layer structure provided by the invention takes pin device, by being to protrude by the distal portion of first support or whole installation
It is set greater than equal to second support in the distal end end face of second support, and by the maximum gauge of the protrusion of first support
Diameter so that barrier space is formed between the protrusion of first support and the distal end end face of second support, in double-layer structure
When pin device being taken to withdraw, which can stop free thrombosis, thrombus breaks loose be avoided, to avoid secondary bolt
Plug improves therapeutic effect.
Description of the drawings
Fig. 1 is the schematic diagram for taking pin device to take bolt in the blood vessel that the prior art provides；
Fig. 2 is the structural schematic diagram for taking pin device for the double-layer structure that the embodiment of the present invention one provides；
Fig. 3 is the schematic diagram for taking the grid of second support in pin device for the double-layer structure that the embodiment of the present invention one provides；
Fig. 4 is the schematic diagram for taking the grid of first support in pin device for the double-layer structure that the embodiment of the present invention one provides；
Fig. 5 is the schematic diagram for taking the distal end of holder in pin device for the double-layer structure that the embodiment of the present invention one provides；
Fig. 6 is the schematic diagram in the barrier space for taking pin device formation for the double-layer structure that the embodiment of the present invention one provides；
Fig. 7 is that the double-layer structure that the embodiment of the present invention one provides takes the pin device to take the schematic diagram of bolt in the blood vessel；
Fig. 8 is another structural schematic diagram for taking pin device for the double-layer structure that the embodiment of the present invention one provides；
Fig. 9 is the schematic diagram for taking push rod in pin device for the double-layer structure that the embodiment of the present invention one provides；
Figure 10 is the front view for taking pin device of double-layer structure provided by Embodiment 2 of the present invention；
Figure 11 is the front view for taking pin device for the double-layer structure that the embodiment of the present invention three provides.
In figure：
100- blood vessels；200- thrombus；
10 '-take bolt holder；
10- takes bolt holder；11- first supports；12- second supports；20- push rod；30- microtubulars；40- fetters point；41-
First constraint point；42- second fetters point；50- development target seekers.
Specific implementation mode
The technical solution further illustrated the present invention below in conjunction with the accompanying drawings with embodiment.It is understood that this place
The specific embodiment of description is used only for explaining the present invention rather than limitation of the invention.It also should be noted that in order to
Convenient for description, in attached drawing, only the parts related to the present invention are shown and it is not all.It also should be noted that being described below
Term " proximal end " and " distal end " are used, wherein " proximal end " refers to, close to one end of operating side, distally referring to far from operation
The one end at end.
Embodiment one
Pin device is taken the present embodiment provides a kind of double-layer structure, as shown in Fig. 2, including taking bolt holder 10 and taking bolt branch
The push rod 20 and be set in 20 outside of push rod and bolt holder 10 can will be taken to be pressed into the microtubular 30 in it that frame 10 connects.Its
In take bolt holder 10 include first support 11 and second support 12, the close end of the close end and second support 12 of first support 11
It is connect with push rod 20 by same constraint point 40, constraint point 40 is fixed with developing ring or development silk, and fixed form may be used
Welding, riveting or pressure are held.The distal portion of first support 11 protrudes from the distal end end face of second support 12, and first support 11
The diameter of distal portion gradually increases along proximal end to distal direction, and the maximum gauge after increase is more than or equal to the straight of second support 12
Diameter.
Double-layer structure provided in this embodiment takes pin device, takes bolt holder 10 to be designed using double-layer structure, is taking bolt
When can securely clamp thrombus 200, increase thrombus 200 and capture stability.Further, as shown in Figure 3 and Figure 4, second
Frame 12 is designed using big mesh so that after taking bolt holder 10 to be discharged in blood vessel 100, thrombus 200 can preferably be embedded in second
Holder 12；First support 11 is designed using small mesh so that first support 11 can preferably clamp embedded second support 12
Thrombus 200.Preferably, the mesh area of second support 12 is 2-5 times of the mesh area of first support 11, and first support 11 saves
Long to save length compared with second support 12,12 wave head quantity of usual second support is 2-6, and 11 wave head quantity of first support is 3-8,
Make mesh and the mesh of second support 12 of first support 11 mutual when first support 11 is assembled into one with second support 12
It is staggered, so as to play the ability of effective clamping thrombus.
Double-layer structure provided in this embodiment takes pin device, as shown in figure 5, the distal portion of its first support 11 is from second
The distal end end face of holder 12 or the distal end endface for slightly protruding from second support 12 start reducing, from the distal end of second support 12
The longitudinal length at maximum gauge behind face to reducing is b；The diameter D of second support 12 is more than straight before 11 reducing of first support
Diameter d forms transverse height drop h；The position relationship of b and h makes in the barrier space for taking 10 distal end of bolt holder to form class T shapes
Q, as shown in Figure 6.When taking pin device to withdraw, though free thrombus 200 under the action of forward blood flow along with the side of withdrawing
It moves, can be also fallen in the Q of barrier space in the opposite direction, along with the diameter after 11 reducing of first support is more than or equal to the
The diameter of two holders 12, so plugging action can be again served to falling to the free thrombus 200 in the Q of barrier space, effectively again
Thrombus 200 is prevented to be detached from, as shown in Figure 7.Preferably, b 5-10mm, D are 1.2-2.5 times of d, this structure design can be
Bolt is taken to keep arresting the area of space of thrombus in the process to greatest extent.In addition, in the present embodiment, before 11 reducing of first support
Diameter be 1.5-4mm, the maximum gauge after reducing is 2.5-7mm, and reducer designs for sloped transition.
Referring to Fig. 7, double-layer structure provided in this embodiment take pin device take bolt process as follows：Bolt holder is taken when initial
10 are compressed in microtubular 30, and when thrombus 200 occurs for blood vessel 100, it is remote to microtubular 30 to pass through thrombus 200 for microtubular 30 first
End exceeds 200 distal end 5-15mm of thrombus；Then bolt holder 10 will be taken to be delivered to 30 distal end of microtubular along 30 inner cavity of microtubular；Then
It slowly withdraws the release of microtubular 30 and takes bolt holder 10, since first support 11 protrudes from second support 12, so first support 11
It takes the lead in being opened, and since the distal end maximum gauge of first support 11 is more than or equal to the diameter of second support 12, so when first
The distal end of holder 11 can have good adherent performance after being released with blood vessel 100, while can also play handle and take pin device solid anchor
The effect being scheduled on vascular wall；It then proceedes to withdraw microtubular 30, when the distal end of second support 12 is opened, slowly push away forward
Dynamic push rod 20, make to release takes bolt holder 10 to be slightly compressed longitudinally, and this operation is conducive to take bolt holder 10 that can be bent
Blood vessel in preferably it is adherent；Then aforesaid operations are repeated to taking bolt holder 10 to discharge completely, are opened completely when taking bolt holder 10
When, thrombus 200 is embedded in the mesh of second support 12, and is clamped by first support 11；It finally withdraws and takes pin device, not clamped
Free thrombus 200 is blocked by the distal portion of first support 11 in barrier space, to will not fall off.
It is possible to further smear in the distal portion of first support 11 or wrap up polymeric membrane, and on polymeric membrane surface
Micropore is set, this structure design can effectively stop that thrombus 200 and blood flow pass through.
In addition, in the present embodiment, second support 12 is that proximal end is closed, distal end Open architecture, this structure is advantageous
In the structure distribution of first support 11；First support 11 is that proximal end is closed, distal end Open architecture, referring to Fig. 2-Fig. 4.At it
In his embodiment, first support 11 or far and near end are all closed formula structure, as shown in figure 8, the distal end of first support 11
It is set as closed, can effectively capture the thrombus 200 dropped to inside first support 11.It is possible to further first
The development target seeker 50 by spring Coil-up is arranged in 11 distal end end face of holder, and development target seeker 50 can help that pin device is taken to pass through blood
Bolt 200.
Further, as shown in figure 9, push rod 20 includes mandrel and the development silk being wrapped on mandrel, push rod 20 is adopted
With this structure design, convenient for showing the position for taking pin device in diseased region.Specifically, development silk may be used tantalum, gold,
Platinum, platinoiridita, platinum tungsten etc. can developing materials.
In addition, first support 11 and second support 12 can be formed for example, by laser cut Nitin tubing, laser cutting
Then thermal finalization forms niti sheet material, and NiTi silk material weaves, and can also be process using flexible plastic material.
Embodiment two
The present embodiment provides a kind of pin devices that takes of double-layer structure, for simplicity, only describe it with embodiment one not
Same place.In the present embodiment, as shown in Figure 10, push rod 20 is through to inside second support 12, the proximal end of second support 12
Portion is connect by the first constraint point 41 with push rod 20, and the close end of first support 11 passes through the second constraint point 42 and push rod 20
One end connection being through to inside second support 12.The distal portion of first support 11 protrudes from the distal end end face of second support 12,
And the diameter of the distal portion of first support 11 gradually increases along proximal end to distal direction, and the maximum gauge after increase is more than or equal to
The diameter of second support 12.
Double-layer structure provided in this embodiment takes pin device that 10 distal end of bolt holder is being taken to form barrier space, is taking bolt
When device is withdrawn, which can form blocking to free thrombus 200, and thrombus 200 is avoided to fall off.
Embodiment three
The present embodiment provides a kind of pin devices that takes of double-layer structure, for simplicity, only describe it with embodiment one not
Same place.In the present embodiment, as shown in figure 11, push rod 20 runs through entire second support 12, the close end of second support 12
It is connect with push rod 20 by the first constraint point 41, the close end of first support 11 is passed through by the second constraint point 42 with push rod 20
It wears to one end outside 12 distal end of second support and connects.The whole distal end end face for protruding from second support 12 of first support 11, and the
The whole diameter of one holder 11 gradually increases along proximal end to distal direction, and the maximum gauge after increase is more than or equal to second support
12 diameter.
Double-layer structure provided in this embodiment takes pin device that 10 distal end of bolt holder is being taken to form barrier space, is taking bolt
When device is withdrawn, which can form blocking to free thrombus 200, and thrombus 200 is avoided to fall off.
Obviously, the above embodiment of the present invention is just for the sake of clearly illustrating examples made by the present invention, and it is pair to be not
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement etc., should be included in the claims in the present invention made by within the spirit and principle of invention
Protection domain within.
Claims (10)
1. a kind of double-layer structure takes pin device, including takes bolt holder (10), push rod (20) and microtubular (30)；Its feature exists
In described to take bolt holder (10) include first support (11) and second support (12), and the first support (11) is located at described the
The inside of two holders (12), the close end of the first support (11) and the close end of the second support (12) pass through constraint
Point (40) is connect with the push rod (20), and the distal portion or entirety of the first support (11) protrude from the second support
(12) distal end end face, and the maximum gauge of the protrusion of the first support (11) is more than or equal to the second support (12)
Diameter.
2. double-layer structure according to claim 1 takes pin device, which is characterized in that the proximal end of the first support (11)
Portion is connect by same constraint point (40) with the push rod (20) with the close end of the second support (12), described first
The distal portion of frame (11) protrudes from the distal end end face of the second support (12).
3. double-layer structure according to claim 1 takes pin device, which is characterized in that the push rod (20) is through to institute
The inside of second support (12) is stated, the close end of the second support (12) passes through the first constraint point (41) and the push rod
(20) it connects, the close end of the first support (11) is through to by the second constraint point (42) with the push rod (20) described
The internal one end connection of second support (12), the distal portion of the first support (11) protrude from the remote of the second support (12)
Hold end face.
4. double-layer structure according to claim 1 takes pin device, which is characterized in that the push rod (20) is through entire
The close end of the second support (12), the second support (12) is connected by the first constraint point (41) with the push rod (20)
It connects, the close end of the first support (11) is through to described second by the second constraint point (42) with the push rod (20)
One end connection outside frame (12) distal end, the first support (11) integrally protrude from the distal end end face of the second support (12).
5. taking pin device according to claim 1-4 any one of them double-layer structures, which is characterized in that the second support
(12) mesh area is 2-5 times of the mesh area of the first support (11).
6. taking pin device according to claim 1-4 any one of them double-layer structures, which is characterized in that the first support
(11) diameter of protrusion gradually increases along proximal end to distal direction.
7. taking pin device according to claim 1-4 any one of them double-layer structures, which is characterized in that the first support
(11) protrusion is enclosed with polymeric membrane, and micropore is provided on the polymeric membrane.
8. taking pin device according to claim 1-4 any one of them double-layer structures, which is characterized in that the second support
(12) proximal end is closed, is distally open.
9. taking pin device according to claim 1-4 any one of them double-layer structures, which is characterized in that the first support
(11) proximal end is closed, is distally open or closed.
10. taking pin device according to claim 1-4 any one of them double-layer structures, which is characterized in that the first support
(11) distal end end face is provided with development target seeker (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810718417.XA CN108742774A (en) | 2018-07-03 | 2018-07-03 | A kind of double-layer structure takes pin device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810718417.XA CN108742774A (en) | 2018-07-03 | 2018-07-03 | A kind of double-layer structure takes pin device |
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| Publication Number | Publication Date |
|---|---|
| CN108742774A true CN108742774A (en) | 2018-11-06 |
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ID=63976006
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| CN201810718417.XA Pending CN108742774A (en) | 2018-07-03 | 2018-07-03 | A kind of double-layer structure takes pin device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113813015A (en) * | 2021-09-29 | 2021-12-21 | 广东博迈元通医疗科技有限公司 | Thrombectomy support with strong capture force and thrombectomy device |
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| CN111544083A (en) * | 2020-05-19 | 2020-08-18 | 上海心玮医疗科技有限公司 | Double-deck bolt support of getting with adjustable net |
| CN111920476A (en) * | 2020-07-27 | 2020-11-13 | 上海轩颐医疗科技有限公司 | Double-layer thrombus taking device |
| CN113813015A (en) * | 2021-09-29 | 2021-12-21 | 广东博迈元通医疗科技有限公司 | Thrombectomy support with strong capture force and thrombectomy device |
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| CN115177323A (en) * | 2022-09-09 | 2022-10-14 | 苏州中天医疗器械科技有限公司 | Thrombus taking device and thrombus taking system |
| CN116942252A (en) * | 2023-09-20 | 2023-10-27 | 杭州亿科医疗科技有限公司 | Bolt taking device and bolt taking system |
| CN116942252B (en) * | 2023-09-20 | 2023-11-28 | 杭州亿科医疗科技有限公司 | Bolt taking device and bolt taking system |
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