Summary of the invention
The purpose of the present invention is to provide a kind of mitral leaflet reparation closing devices, difficult to reach simplified surgical procedureDegree reduces operation time, improves the purpose of surgical effect.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of mitral leaflet reparation closing device, including pedestal are arranged and can go up and down relative to pedestal through pedestalPull rod, by pull rod drives edge pull rod axial movement and can relative to pull rod rotate hinge bar, one end is fixed in and pedestalAnd the other end is articulated with the link assembly of hinge bar, and is rotationally connected with pull rod and connects one end of hinge bar and about hinge barSymmetrical metal clips；The link assembly sets there are two and is symmetrically set in pedestal both ends, and rotating tension bar is by bicuspid valve valveThe position to be clamped of leaf is clamped by metal clips and link assembly.
Further, the link assembly includes symmetry riveting in the galianconism bar at pedestal both ends, is articulated with galianconism bar and does not connectConnect pedestal one end and the long armed lever hinged with hinge bar.
Further, each long armed lever include the first long armed lever and with its integrally formed second long armed lever, it is describedThe angle that first long armed lever and the second long-armed bar are formed is more than or equal to 90 degree；One end that the galianconism bar is not connected with pedestal is articulated withThe intersection location of the first long armed lever and the second long armed lever, the second long armed lever are articulated with hingedly far from one end of galianconism barBar.
Further, the metal clips side opposite with the first long armed lever is equipped with pawl.
Further, the described first long armed lever side opposite with metal clips offers through slot along its length.
It further, further include drawing steel wire, the both ends of the drawing steel wire extend through the metal elastic of hinge bar two sidesPiece simultaneously passes through pedestal.
Further, the range at the opening and closing angle of two first long armed levers is 0 ° -217 °.
Further, the maximum exhibition angle positioned at the metal clips of the hinge bar two sides is 120 °.
Further, the pedestal is connect with pull rod by being threadedly engaged, and the metal clips is sheathed on pull rod and passes through CThe fastening of type snap ring rotate it can relative to pull rod.
Further, the pedestal, pull rod, hinge bar and link assembly are made of biocompatible material, the goldBelong to elastic slice to be made of shape-memory material.
Beneficial effects of the present invention: the fast of mitral leaflet can be realized by the mitral leaflet reparation closing deviceSpeed captures, and reduces operation time, reduces operation risk, and structure is simple, production cost is low, reduces the medical treatment of patientExpense.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
A kind of mitral leaflet reparation closing device is present embodiments provided, as illustrated in fig. 1 and 2, the closing device packetInclude pedestal 1, pull rod 2, hinge bar 3, link assembly 4 and metal clips 5, wherein
The pull rod 2 is arranged and can go up and down relative to pedestal 1 through pedestal 1.Specifically, referring to Fig. 2 and Fig. 3, the bottomSeat 1 is equipped with threaded hole, and the pull rod 2 is equipped with the external screw thread 21 being adapted to threaded hole, can make pull rod 2 by screwing pull rod 2Opposite pedestal 1 moves up and down.
The link assembly 4 sets there are two and is symmetrically set in the both ends of pedestal 1, and one end of each link assembly 4 is affixedIn pedestal 1 and the other end is articulated with hinge bar 3.Specifically, the link assembly 4 includes symmetry riveting in the short of 1 both ends of pedestalArmed lever 41 is articulated with galianconism bar 41 and is not connected with 1 one end of pedestal and the long armed lever 42 hinged with hinge bar 3.Wherein each lengthArmed lever 42 include the first long armed lever 421 and with its integrally formed second long armed lever 422, the first long armed lever 421 and secondThe angle that long armed lever 422 is formed is more than or equal to 90 degree.It is long that one end that the galianconism bar 41 is not connected with pedestal 1 is articulated with described firstThe intersection location of armed lever 421 and the second long armed lever 422, the second long armed lever 422 are articulated with far from one end of galianconism bar 41Extension bar 3.
The hinge bar 3 by 2 drives edge pull rod 2 of pull rod axial movement and can be rotated relative to pull rod 2, the pull rod 2Hinge bar 3 is rotationally connected with across one end of pedestal 1.Since hinge bar 3 can rotate and hinge bar 3 and the relative to pull rod 2Two long armed levers 422 are hinged, and the axis direction of the articulated shaft of connection hinge bar 3 and the second long armed lever 422 is perpendicular to hinge bar 3Central axial direction, therefore when screwing pull rod 2, the hinge bar 3 can't be rotated with pull rod 2, when pull rod 2 being avoided to rotateHinge bar 3 rotates therewith and causes to interfere.When screwing pull rod 2, pull rod 2 can be moved up and down relative to pedestal 1, and band simultaneouslyHinge bar 3 is moved along the axial movement of pull rod 2, while hinge bar 3 will drive long armed lever 42 to be respectively relative to hinge bar 3, galianconism bar41 rotations, so that two the first long 421 shapes of armed lever are at a certain angle.
The metal clips 5 is rotationally connected with pull rod 2 and connects one end of hinge bar 3 and symmetrical about hinge bar 3.GinsengAccording to Fig. 2 and Fig. 3, the metal clips 5 is sheathed on pull rod 2 and rotate it can relative to pull rod 2 by the fastening of c-type snap ring 6.ToolBody, the center of the metal clips 5 is equipped with through-hole, and the pull rod 2 is stepped stem, and the diameter of the through-hole is greater than instituteThe diameter that pull rod 2 connects one end of hinge bar 3 is stated, less than the diameter of one end that pull rod 2 is not connected with hinge bar 3.By metal clips 5Pull rod 2 is sheathed on to be not connected with one end of hinge bar 3 and then c-type snap ring 6 is sheathed on one end that pull rod 2 is not connected with hinge bar 3On, the pull rod 2 at the end is rotationally connected with hinge bar 3 and the upper surface of c-type snap ring 6 is made to be tightly attached to the lower end surface of hinge bar 3.ByIt is greater than the diameter that pull rod 2 connects one end of hinge bar 3 in through-hole diameter, so the metal clips 5 is not when screwing pull rod 2It can be rotated with pull rod 2.
In the present embodiment, referring to Figures 1 and 2, if the side opposite with the first long armed lever 421 of the metal clips 5 is equipped withDry pawl 51, the pawl 51 are hurtless measure pawl, i.e., will not cause to mitral leaflet tissue when capturing mitral leafletWound increases the friction of metal clips 5 Yu mitral leaflet by pawl 51, can fast and effectively pass through link assembly 4Capture mitral leaflet.
The first long armed lever 421 side opposite with metal clips 5 offers through slot 4211 along its length.It is twoCusp leaflet provides accommodation space.
By pull rod 2 adjust two the first long armed levers 421 opening and closing angle when, the opening and closing angular range be 0 °-217°。
In the present embodiment, the pedestal 1, pull rod 2, hinge bar 3 and link assembly 4 are made of biocompatible material,Stainless steel, polymer, pyrolytic carbon, silicone resin, polytetrafluoroethylene (PTFE) can be selected to be formed by combining.The metal clips 5 is by shapeMemory material is made.NiTi base memorial alloy can be used in shape-memory material described in the present embodiment, such as Nitinol, titanium nickel niobiumAlloy, titanium Ni-Pd alloy etc. can also be used copper-based memory alloy, such as copper gold kirsite, albronze, copper-tin alloy, may be used alsoUsing Fe-based shape memory alloy, such as iron palladium, FeMnSi alloy.At the opening and closing angle for adjusting two the first long armed levers 421 by pull rod 2When spending, the metal clips 5 will be unfolded according to shape memory property, positioned at 3 two sides of hinge bar metal clips 5 mostThe angle great Zhan is 120 °, and the exhibition angle refers to that the metal clips 5 positioned at 3 two sides of hinge bar opens the angle formed.
In the present embodiment, the mitral leaflet reparation closing device further includes drawing steel wire (not shown), instituteThe both ends for stating drawing steel wire extend through the metal clips 5 of 3 two sides of hinge bar and pass through pedestal 1.As shown in Figure 1, the metalElastic slice 5 is equipped with perforating 52, and the both ends for pulling steel wire are each passed through wearing on the metal clips 5 of 3 two sides of hinge barPedestal 1 is passed through behind hole 52.By adjusting the both ends of drawing steel wire, the position of adjustable metal clips 5 and its exhibition angle size,Convenient for capturing mitral leaflet faster.After adjusting, drawing steel wire can be extracted out from one end, influenced to prevent drawing steel wireSurgical procedure.
Other connectors used in the present embodiment are made of biocompatible material.
The mountable intervention that heart is carried out in transportation system of closing device of mitral leaflet reparation described in the present embodimentOperation.The present embodiment illustrates the specific work process of the closing device so that mitral valve " edge is to edge " closure is repaired as an example.
The mitral leaflet reparation closing device is before entering ventricle, generally closed state (referring to Fig. 4), andIt is placed into transportation system, guarantees its fluency intervened via apex of the heart channel, prevent the excessive influence mitral leaflet in spaceIts hetero-organization.After the apex of the heart punctures, transportation system enters in left ventricle under the guidance of contrast apparatus, by transportation systemOperation handle adjust closing device position two the first long armed levers are made by adjusting yoke 2 after reaching target bearing421 open, while metal clips 5 is unfolded according to its shape memory function, and adjust metal by drawing steel wire and pull rod 2The expanded angle of elastic slice 5, in order to capture the edge of mitral valve faster.When the first long armed lever 421 touches bicuspid valveWhen film, loosen the drawing steel wire of control metal clips 5, so that the metal clips 5 for being located at 3 both ends of hinge bar is in 120 degree, metal elasticMitral valve edge is clamped in piece 5 and the first long cooperation of armed lever 421, then extracts metal clips 5 out.Make two by adjusting yoke 2A first long armed lever 421 is gradually closed, and realizes the clamping to mitral valve edge by metal clips 5 and the first long armed lever 421.When aforesaid operations are completed in confirmation, after mitral regurgitation is eased, entire transportation system is withdrawn, closing device stays in bicuspid valveAt film edge.
The mitral leaflet reparation closing device can realize the quick capture of mitral leaflet through this embodiment, dropLow operation time reduces operation risk, and structure is simple, and production cost is low, reduces the medical expense of patient.
Obviously, the above embodiment of the present invention is just for the sake of clearly illustrating examples made by the present invention, and being not is pairThe 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 descriptionTo make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all thisMade any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of inventionProtection scope within.