Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, various aspects of the present utility model are described in detail.Wherein, the parts in accompanying drawing are not necessarily drawn to scale, and it focuses on being illustrated principle of the present utility model.
In each embodiment of the present utility model, it is thus well known that structure, material or operation are shown without or do not elaborate.Further, described feature, structure or characteristic can combine in one or more embodiments by any way.Additionally, it will be appreciated by those skilled in the art that following various embodiments are served only for illustrating, not for limiting protection domain of the present utility model.Can also be easy to understand, element or parts in each embodiment described herein and shown in the drawings can be arranged by multiple different configurations and be designed.
With reference to Fig. 1, it illustrates an example of intravascular stent induction system according to this utility model embodiment.In this example, for intravascular stent being delivered to internal induction system, i.e. intravascular stent induction system, can include, but are not limited to: housing, cleaning pipe 300, the conduit tube component being mainly made up of trocar sheath 200 and inner tube 800 and the driving assembly 400 being made up of right half-shell 110 and left shell half 120.
Wherein, described trocar sheath 200 is positioned at the outside of described housing and is connected with the first end 101 of described housing by adapter piece 600 and tee T 500.Specifically, trocar sheath 200 inserts and extends to the first end 501 with tee T 500, thus connect with described tee T 500, and adapter piece 600 and described housing are fixed, such as, right half-shell 110 and left shell half 120 clamp described adapter piece 600, and are coordinated with connection features 111 by nut 121, right half-shell 110 and left shell half 120 are fixed.Tee T 500 is for being carried out the forward part (i.e. near the part of trocar sheath) of intravascular stent induction system, as a kind of optional embodiment, can be Rule tee T, it is of course also possible to be other the suitable tee Ts that can be used for intravascular stent induction system.As shown in Figure 1, tee T 500 is positioned at the first end 101 of described housing, and this tee T 500 can have the 3rd end 503 of the first end 501 of the outside extending out to described housing, the second end 502 communicated in described housing and with the first end 501 straight line and the outside that is arranged between described first end 501 and the second end 502 and extend out to described housing.Wherein, the first end 501 of described tee T 500 is connected with trocar sheath 200 by adapter piece 600 and is connected.First end of said inner tube 800 is extended through this tee T 500 from the second end 502 of this tee T 500, stretches out from its first end 501 and enters in described trocar sheath 200.The end of the 3rd end 503 of tee T 500 has opening and closes the joint cap 522 of this opening.So, in the course of conveying of intravascular stent, joint cap 522 closes this opening, flows out from this opening with preventing humor (i.e. blood)；After intravascular stent conveying terminates, joint cap 522 can be opened, add cleanout fluid by this opening, to being carried out of the forward part of intravascular stent induction system.As selection, it is convenient to omit tee T 500, such as, for disposable blood pipe holder induction system, the most i.e. abandon owing to using, it is not necessary to using tee T 500 to be carried out it, therefore, such intravascular stent induction system can not have tee T 500.
Wherein, intravascular stent induction system is carried out after terminating in intravascular stent conveying by described cleaning pipe 300.In a kind of embodiment of the present utility model, cleaning pipe 300 can be integrated bipass, such as, by PC (Merlon) material integrated Rule bipass, it is connected with the second end 102 of described housing, and the first end 301 of this cleaning pipe 300 is positioned at the inside of described housing, the second end 302 extend out to the outside of described housing.In a kind of embodiment of the present utility model, clean and be provided with connection features 303,304 on pipe 300, position corresponding in the right half-shell 110 of housing is provided with the connection features 113,114 coordinated with described connection features 303,304, by connection features 303,304 is embedded in connection features 113,114, cleaning pipe 300 is fixed with housing, simultaneously by combining to clamp described cleaning pipe 300 by right half-shell 110 and left shell half 120.Additionally, as it is shown in figure 1, the end of the second end 302 of described cleaning pipe 300 has opening and closes the joint cap 320 of this opening.So, in the course of conveying of intravascular stent, joint cap 320 closes this opening, flows out from this opening with preventing humor (i.e. blood)；After intravascular stent conveying terminates, joint cap 320 can be opened, add cleanout fluid by this opening, intravascular stent induction system is carried out.As selection, it is convenient to omit cleaning pipe 300, such as, for disposable blood pipe holder induction system, the most i.e. abandon owing to using, it is not necessary to use cleaning pipe 300 to be carried out it, therefore, such intravascular stent induction system can not have cleaning pipe 300.
Wherein, a part for said inner tube 800 is positioned at described housing.First end (not shown) of inner tube 800 stretches to the inside of described trocar sheath 200, and in this example, inner tube 800 is inserted through tee T 500 from the second end 502 of tee T 500 and extend into the inner chamber of trocar sheath 200.Second end of said inner tube can stretch in the tube chamber of this cleaning pipe 300 from the first end 301 of described cleaning pipe 300.
nullWherein，A part for described driving assembly 400 is positioned at described housing，The part operation being positioned at this housing with said inner tube 800 engages，Specifically，Assembly 400 is driven mainly to be made up of thumb drives part 401 and guide rail 402，Drive assembly 400 between first end and the second end of inner tube，Wherein，The right half-shell 110 of housing is by connection features 112、115、116 are connected with driving assembly 400，Nut 121 is through the hole in the left shell half 120 of housing，And through the hole on jump ring 122 and guide rail 402，It extend into the screw 111 in right half-shell 110，Left shell half 120 and right half-shell 110 are combined with the joint of screw 111 by nut 121，Thus the part driving assembly 400 is contained in housing，And drive a part for the thumb drives part 401 of assembly 400 to expose from housing so that being manually actuated.Inner tube 800 is through guide rail 402, and engage with a part for thumb drives part 401, when doctor or other operators operate thumb drives part 401, under the push-and-pull of thumb drives part 401, inner tube 800 moves along guide rail 402, and then make said inner tube be axially moveable in the inner chamber of described trocar sheath and cleaning pipe, specifically, first end relative movement in trocar sheath 200 of inner tube, so that intravascular stent advances along trocar sheath 200 and enters Ink vessel transfusing, afterwards, deployable and be supported on blood vessel.Meanwhile, the second end of inner tube moves in cleaning pipe 300 with moving integrally of inner tube.
In the conduit tube component of this utility model embodiment, remaining at least partially within described trocar sheath 200 of inner tube 800, as in figure 2 it is shown, one end of inner tube 800 connects conical head (TIP head) 1100, the other end passes inner sleeve 1200, and is connected with inner sleeve 1200.Wherein, TIP 1100 end being positioned at trocar sheath 200, it is used for guiding described conduit tube component to move at Ink vessel transfusing.Described inner sleeve 1200 keeps said inner tube 800 to be axially moveable in described trocar sheath 200, prevents inner tube 800 from bending in trocar sheath 200.Being provided with agnail 900 in said inner tube 800, specifically, agnail 900 is arranged on intravascular stent assembly area in inner tube 800, i.e. between inner sleeve 1200 and TIP 1100.Described agnail 900 can be made up of the elastomeric material of such as Nitinol etc, and is configured to when said inner tube 800 moves relative to trocar sheath 200 to move intravascular stent to vascular lesion position.Specifically, when agnail 900 is in trocar sheath 200, before push away inner tube 800, agnail 900 captures the inwall of intravascular stent and discharges outward, is moved by intravascular stent to vascular lesion position, and agnail 900 stretches out trocar sheath 200 simultaneously, post-tensioning inner tube 800, being back in trocar sheath 200 by agnail 900, the inwall again capturing one section of intravascular stent releases one section again, and this action is until discharging completely repeatedly.Thus, inner tube goes for the intravascular stent of random length, inner tube is customized without the intravascular stent according to different length or different vascular lesion positions, improve the compatibility of intravascular stent induction system, thus operation is simplified, and reduce the cost of intravascular stent induction system, certainly also reduce the treatment cost of patient.
In this utility model embodiment, as it is shown on figure 3, inner tube 800 can include, but are not limited to: metal tube 802 that metal knitted pipe 801 is connected with this metal knitted pipe 801, connecting tube 803.Described connecting tube 803 is enclosed within the junction of described metal tube 802 and described metal knitted pipe 801, and described connecting tube 803 is bonding with described metal knitted pipe 801 and described metal tube 802 by binding agent (such as, anaerobic adhesive).Metal tube 802 connects TIP head, and metal knitted pipe 801 drives the part (such as, other metal tube) of assembly 400 to connect with connecting of said inner tube 800.In a kind of preferred implementation of the present utility model, described metal tube 802 can be NiTi pipe, it is preferable that the part that described metal tube 802 is connected with connecting tube 803 can have helical cutting (not shown) along the length direction of this metal tube.When metal tube 802 is bonding with connecting tube 803, binding agent enters in helical cutting, increases adhesive strength.Simultaneously when inner tube 800 enters human body bending pathological changes, can be more preferably by property.
As it is shown on figure 3, agnail 900 is arranged on metal tube 802, and adjoins with connecting tube 803 or adjoin or be connected, it is preferable that the outer surface of agnail 900 continuously and seamlessly transits with the outer surface of connecting tube 803.As such, it is possible to the numbers of steps on minimizing inner tube outer surface, reduce the step adverse effect to intravascular stent conveying operations.In a kind of embodiment of the present utility model, agnail 900 includes corners 901 and base portion 902, corners 901 from base portion 902 in the axial direction of metal tube 802 radial outward expansion, i.e., line radial expansion centered by the axis of metal tube 802, it is configured to two wedge angle air line distances of two corners 902 radial dimension more than base portion 902, and the equal diameters of the diameter of base portion 902 and connecting tube 803.As selection, agnail 900 can be made up of the elastomeric material of such as marmem etc, and by laser welding on the metal tube of inner tube 800, so, improve agnail and the rigidity at place is set, solve in prior art, owing to rigidity is not enough, discounting phenomenon occurs.
In an advantageous embodiment, described metal knitted pipe 801 is three-decker, wherein, in described three-decker, internal layer is that PTFE (politef) layer, outer layer are PEBAX (block polyether acidamide resin) layer and the intermediate layer between described internal layer and outer layer is wire braid, such as rustless steel braided steel wire net.Wherein, described metal tube 802 is fixed to be connected with described metal knitted pipe 801 and is included: described metal tube 802 welds with the wire braid of described metal knitted pipe 801, i.e. laser welding NiTi pipe and wire braid.
In another kind of preferred implementation of the present utility model, it is convenient to omit connecting tube 803, inner tube is made up of metal knitted pipe and metal tube.One end of metal tube is connected with metal knitted pipe, and the other end is connected with TIP head；One end of metal knitted pipe is connected with metal tube, and the other end passes inner sleeve.In the one end of described metal tube is inserted into the one end of described metal knitted pipe and described metal tube is fixed with described metal knitted pipe and is connected.
It should be noted that be above the embodiment for illustrating thought of the present utility model, concept or principle, this utility model is not limited to above-described embodiment.Those skilled in the art can carry out various change to above-described embodiment according to this utility model thought, concept or principle, obtains more embodiment.
When being made up of metal knitted pipe, NiTi pipe and connecting tube for inner tube, in the case of controlling wall thickness, do not affect the attachment force between conduit parts, use ultra-thin-wall connecting tube, inner tube front end uses the ultra thin wall metallic tube ground to couple, after grinding, wall thickness is 0.02mm, and this is that other high molecule plastic pipe is not reached.Further, the connected mode of employing: being inserted into by NiTi pipe in metal establishment pipe, connecting tube is enclosed within each half in two pipes, anaerobic adhesive be coated in connecting tube interval inwall bonding firmly after, laser welding NiTi pipe and metal establishment pipe.So, pipe connected pipe wall thickness in effectively controlling, and, inner tube is when repeatedly pushing, it is to avoid the excessive head end scraping support causing connecting tube of step, impact pushes effect.Gluing combination laser welding, double insurance, even if anaerobic adhesive is through coming off for a long time or rosin joint phenomenon occur, still ensures that the TIP of inner tube will not fall into human body, malpractice occurs.
In addition, increase an elastic NiTi agnail on the metal tube of inner tube and carry out reciprocating propelling movement, when agnail is in trocar sheath, the agnail crawl rack inner wall of NiTi elasticity discharges support outward and goes out outer tube to vascular lesion position, agnail stretches out outer tube simultaneously, post-tensioning agnail again captures one section of rack inner wall and again releases one section to (backing positions is constant) in outer tube, and this action is until discharging completely repeatedly.
Agnail uses NiTi cutting heat setting process, expands and is pointed at horn mouth, and for 6F pipe sheath (trocar sheath of the most a diameter of 6F), two wedge angle air line distances are more than 1.35mm.
So, the inner tube of this utility model design can be unified for a kind of specification, to release all intravascular stents meeting 6F pipe sheath, solve the problem that existing general induction system needs to customize inner tube length according to stent length and diameter.Further, the reciprocal small distance of one-handed performance formula pushes repeatedly, and easy to control, feel is higher.
This utility model terminology used herein and wording, just to illustrating, are not intended to constitute restriction.It will be appreciated by those skilled in the art that on the premise of the ultimate principle without departing from disclosed embodiment, each details in above-mentioned embodiment can be carried out various change.Therefore, protection domain of the present utility model is only determined by claim, and in the claims, except as otherwise noted, all of term should be understood by the broadest rational meaning.