Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a valve holder for a mitral valve prosthesis, which can realize radial fixation of the valve angle of the mitral valve prosthesis, so that the damage of the valve angle caused by overlarge deformation can be avoided when the valve angle is folded; in addition, the valve holding device for the artificial mitral valve is split, so that the production cost and the use cost are greatly reduced.
The invention provides a valve holder for a mitral valve prosthesis, which comprises: handle portion, core bar, ratchet and hold lamella portion; wherein,
the valve holding part is provided with a barrel-shaped cavity with an opening at the upper part and a through hole at the bottom, the inner wall of the barrel-shaped cavity is provided with a ratchet groove and a sliding groove, the outer side of the valve holding part is provided with three valve supporting parts along the circumferential direction of the barrel-shaped cavity, the outer edge of the lower part of each valve supporting part forms a supporting surface for supporting the artificial mitral valve, the radial dimension of the ring surrounded by the three supporting surfaces along the circumferential direction of the valve holding part is consistent with the inner diameter of the sewing edge of the supported artificial mitral valve, the upper part of the supporting surface is provided with a line holding part, and the line holding part can lead the tightening line to penetrate from the inner side of the line holding part to the;
the top end of the core rod is provided with a positioning plate, the lower end face of the positioning plate is provided with a positioning core rod, the upper part of the positioning core rod forms a clamping part with an increased outer diameter, the lower edge of the clamping part forms a hook structure, the ratchet wheel can be sleeved on the clamping part, so that the combination body of the ratchet wheel and the clamping part can be accommodated in the upper opening of the barrel-shaped cavity of the valve holding part, the lower part of the positioning core rod can extend out of the through hole at the bottom of the barrel-shaped cavity, and the ratchet wheel and the hook structure are respectively matched with the ratchet wheel groove and the sliding groove on the inner wall of the;
the handle part is detachably arranged on the positioning plate of the core rod and can drive the core rod to rotate.
In one embodiment, the handle portion comprises a handle seat and a detachable handle, a first threading hole is formed in the handle seat, and a second threading hole is formed in the positioning plate of the core rod corresponding to the first threading hole.
Furthermore, the first threading hole and the second threading hole are two, and a first threading groove is formed between the first threading holes.
In one embodiment, the upper portion of the positioning plate of the core bar is provided with a fixing hole, the lower portion of the handle seat is provided with a fixing rod capable of being matched with the fixing hole, and the fixing rod and the fixing hole are clamped and fixed through a clamping groove structure.
In one embodiment, the clamping portion with the increased outer diameter at the upper portion of the positioning core bar is a cage-shaped structure, the cage-shaped structure has three central columns with upper ends fixed to the lower end surface of the positioning plate, the lower ends of the central columns are respectively connected with the outer ends of a cross beam, the inner ends of the cross beam are converged on the positioning core bar, the lower end edges of the central columns form the hook structure, and the three cross beams are respectively provided with a wire tying through hole for threading a tightening wire.
Furthermore, the lower part of the positioning core rod is a columnar body, one end of the positioning core rod is connected with the junction of the beam, and the other end of the positioning core rod extends out of the through hole at the bottom of the barrel-shaped cavity.
Furthermore, the periphery of the ratchet wheel is provided with at least one elastic tooth tangent to the periphery of the ratchet wheel.
In one embodiment, the thread holding part is of a two-stage ladder structure, the first-stage ladder is fixed on the periphery of the lower part of the valve holding part barrel-shaped cavity, the supporting surface for supporting the prosthetic mitral valve is positioned below the inner side of the second-stage ladder, three thread holes distributed at intervals are formed in the second-stage ladder along the circumferential direction, and a thread passing channel capable of enabling the tightening thread to penetrate through the thread holes from the extending part of the positioning core rod is arranged on the first-stage ladder.
Furthermore, a second thread cutting groove is formed between two of the three thread holes distributed at intervals.
Furthermore, two sets of a pair of protrusions distributed along the axial direction are respectively arranged in the corresponding areas of the periphery of the valve holding barrel-shaped cavity, and the valve hanging rack can be fixed between the pair of protrusions due to the arrangement of the pair of protrusions.
The artificial mitral valve holds the valve device that the invention provides, through holding mutual matching of the valve department, core bar, ratchet to realize holding the unidirectional rotation in the valve department barrel-shaped cavity, in addition hold the line part and make it wear to set up to its lower tightening wire to tighten up from its inside through holding the line part while the handle department rotates, thus realize the radial fixation to the valve angle of the artificial mitral valve; in addition, the valve holding device for the artificial mitral valve is of a split structure, so that the structure of the mold is greatly simplified, the manufacturing cost of the mold is reduced, and meanwhile, only corresponding valve holding parts need to be replaced when aiming at mitral valves of different sizes, so that the use cost is reduced.
Drawings
FIG. 1 is a schematic structural view of a mitral valve prosthesis holder according to the present invention in a split state;
FIG. 2 is a schematic structural view of a valve holding portion of the prosthetic mitral valve holder of the present invention;
FIG. 3 is a schematic structural view of a handle seat and a core rod of the valve holder for a mitral valve prosthesis according to the present invention;
FIG. 4 is a bottom view of the core rod of the prosthetic mitral valve holder of the present invention;
fig. 5 is a schematic view of the prosthetic mitral valve holder of the present invention after being connected and fixed with a prosthetic mitral valve.
Reference numerals:
1: handle portion 2: core bar
3: ratchet 4: valve holding part
12: a handle seat 13: handle (CN)
14: fixing the rod 15: fixing rib
123: first tangential grooves 121a, 121 b: first threading hole
21: positioning plate 22: positioning core rod
23: the catch 24: hook structure
212: fixing holes 214a, 214 b: second threading hole
213: fixing groove 25: columnar body
231: center pillar 232: cross beam
233: wire tying through hole 41: barrel-shaped cavity
42: ratchet groove 43: sliding chute
45: supporting surface 46: wire holding part
47: line passing passages 461a, 461b, 461 c: threading hole
462: second tangential groove a: tightening wire
b, valve angle c, artificial mitral valve
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a structural schematic view of the valve holder for a mitral valve prosthesis of the present invention in a split state. Fig. 2 is a schematic structural view of a valve holding part of the prosthetic mitral valve holder of the present invention. Fig. 3 is a schematic structural diagram of a handle seat and a core rod of the valve holder for a mitral valve prosthesis of the invention. Fig. 4 is a bottom view of the core rod of the prosthetic mitral valve holder of the present invention. Fig. 5 is a schematic view of the prosthetic mitral valve holder of the present invention after being connected and fixed with a prosthetic mitral valve.
Referring to fig. 1-5, the present invention provides a mitral valve prosthesis holder, comprising: handle portion 1, core bar 2, ratchet 3 and hold lamella portion 4.
The valve holding part 4 is provided with a barrel-shaped cavity 41 with an upper opening and a through hole at the bottom, a ratchet groove 42 and a sliding groove 43 are arranged on the inner wall of the barrel-shaped cavity, three valve supporting parts 44 are arranged on the outer side of the valve holding part 4 along the circumferential direction of the barrel-shaped cavity 41, a supporting surface 45 used for supporting the artificial mitral valve is formed on the outer edge of the lower part of each valve supporting part 44, the radial size of the three supporting surfaces 45 which are encircled into a ring shape along the circumferential direction of the valve holding part 4 is consistent with the inner diameter of the suture edge of the supported artificial mitral valve, a line holding part 46 is arranged on the upper part of each supporting surface 45, and the line holding part 46 can enable a tightening line to penetrate from the inner side of the line.
The top end of the core rod 2 is provided with a positioning plate 21, the lower end face of the positioning plate 21 is provided with a positioning core rod 22, the upper part of the positioning core rod 22 forms a clamping part 23 with an increased outer diameter, the lower edge of the clamping part 23 forms a hook structure 24, the ratchet wheel 3 can be sleeved on the clamping part 23, so that the combination body of the ratchet wheel 3 and the clamping part 23 can be accommodated in the upper opening of the barrel-shaped cavity 41 of the valve holding part, the lower part of the positioning core rod 22 can extend out of the through hole at the bottom of the barrel-shaped cavity 41, and the ratchet wheel 3 and the hook 24 structure are respectively matched with the ratchet groove 42 and the sliding groove 43 on the inner.
The handle part 1 is detachably arranged on the positioning plate 21 of the core rod 2, and the handle part 1 can drive the core rod 2 to rotate.
In the valve holder for the artificial mitral valve, the handle part 1 is used for an operator to hold and forms a driving force for tightening the valve angle b of the artificial mitral valve when rotating clockwise or anticlockwise, the core rod 2 connected with the handle part 1 is matched with the ratchet wheel 3 and transmits the driving force from the handle part 1 to the ratchet wheel 3, and the ratchet wheel 3 is matched with the ratchet wheel groove 42 on the inner wall of the barrel-shaped cavity and enables the ratchet wheel 3 to rotate only in one direction in the ratchet wheel groove 42; when the artificial mitral valve is placed and supported at the outer edge of the lower part of the valve supporting part, the artificial mitral valve is radially and axially fixed through a tightening line a, wherein one end of the tightening line a can be fixed on the positioning core rod 2, the other end of the tightening line a penetrates through the inner side of the wire holding part 46 (specifically, the part which can extend out of a through hole at the bottom of the barrel-shaped cavity from the positioning core rod 22) to the lower part of the wire holding part 46, and then the tightening line a is driven to tighten the valve angle b of the artificial mitral valve under the wire holding part 46 after penetrating through the valve angle b; because the ratchet wheel 3 can only rotate in one direction in the ratchet wheel groove 42, the valve angle c can not be expanded again after being tightened, so that the valve can be firmly fixed on the valve holder in the radial direction and the axial direction, and good fixing, supporting and holding effects can be provided for the artificial mitral valve in the processes of storage, transportation and operation.
In one embodiment, the handle portion 1 may include a handle seat 12 and a detachable handle 13, the handle seat may be provided with a first threading hole, and the positioning plate 21 of the core rod 2 may be provided with a second threading hole corresponding to the first threading hole. The diameters of the first threading hole and the second threading hole can be the same, for example, both are 0.3-1.5 mm; the first threading hole and the second threading hole which are arranged oppositely can be used for binding the handle base 12 and the core bar positioning plate 21, so that the handle base 12 and the core bar positioning plate 21 are fixed relatively. In addition, the detachable handle 13 may be screwed to the handle holder 12, and at this time, an axially-disposed internal threaded hole may be formed in the handle holder 12, and an external thread matching the internal threaded hole may be formed in the handle 13, so as to facilitate the mounting and detaching of the handle 13 on the handle holder 12. In particular, an axially disposed internal threaded hole may be formed in the upper portion of the handle holder 12, and a guide hole having no thread and coaxial with the internal threaded hole may be formed below the internal threaded hole, and the guide hole may be sized to match the handle 13, and may facilitate axial orientation of the handle, thereby preventing the handle 13 from being unable to simultaneously tighten the three valve angles of the prosthetic mitral valve to a predetermined position due to axial displacement.
Further, the first threading hole and the second threading hole can both be two, and a first threading groove 123 is arranged between the first threading holes. The diameters of the two first threading holes 121a and 121b can be the same, the diameters of the two second threading holes 214a and 214b can also be the same, the two threading holes are arranged to be beneficial to fixing the ends of the thread, and the first threading groove 123 is arranged to be beneficial to cutting off the thread binding the handle base 12 and the core bar positioning plate 21, so that the handle base 12 and the core bar positioning plate 21 can be conveniently separated. The first tangential groove 123 can be longitudinally penetrated and can be 0.3-2.0mm in width; in addition, the first threading slot can be arranged by deviating from one of the two first threading holes, so that the thread knot formed by fixing the end part of the thread can be effectively prevented from interfering with the thread cutting process.
In one embodiment, the positioning plate 21 of the core rod 2 has a fixing hole 212 formed at an upper portion thereof, the handle base 12 has a fixing rod 14 disposed at a lower portion thereof, the fixing rod 14 is capable of engaging with the fixing hole 212, and the fixing rod 14 and the fixing hole 212 are fixed by being clamped by a clamping groove structure. Specifically, at least one radial fixing rib 15 may be provided on an upper outer circumference of the fixing lever, and a fixing groove 213 matched with the fixing rib may be provided at a position of the core bar positioning plate corresponding to the fixing rib, a width of the fixing rib 15 may be 0-0.2mm greater than a width of the fixing groove 213, a height of the fixing rib may be 0-0.2mm less than a depth of the fixing groove, and a gap of 0-0.2mm may be formed between the fixing ribs even when the fixing ribs are placed in the fixing groove. Further, the diameter of the fixation rod 14 may be the same as or slightly smaller than the diameter of the fixation bore 212.
Furthermore, the clamping part with the increased outer diameter at the upper part of the positioning core rod 22 is a cage-shaped structure 23, the cage-shaped structure 23 is provided with three central columns 231 with the upper ends fixed on the lower end surface of the positioning plate, the lower ends of the central columns 231 are respectively connected with the outer ends of a cross beam 232, the inner ends of the cross beams 232 are converged on the positioning core rod 22, the lower end edges of the central columns 231 form a hook structure 24, and the three cross beams 232 are respectively provided with a wire tying through hole 233 for threading and tying a tightening wire. Specifically, the hook structure 24 may be, for example, a protrusion extending outward from the outer end of the cross beam 232, which can cooperate with the sliding groove 43 on the inner wall of the barrel-shaped cavity and realize relative rotation, and the length of the protrusion extending from the outer end of the cross beam may be 0.1-2 mm; meanwhile, the sliding groove 43 provided in the inner wall of the barrel-shaped cavity may be an annular sliding groove.
The positioning core bar 22 with the above structure can fix one end of the tightening wire a, for example, one end of each of the three tightening wires a can be respectively wound around the cross beam from above to below one of the three cross beams 232, then tightly tied with the end of the tightening wire a, and then penetrated out of the wire tying through hole 233 and wound on the protruding portion of the positioning core bar 22 from the through hole at the bottom of the barrel-shaped cavity. The diameter of the tethered via can be 0.3-2.0 mm. Furthermore, the lower part of the positioning core rod is a columnar body 25, one end of the positioning core rod is connected with the junction of the cross beam, and the other end of the positioning core rod extends out of the through hole at the bottom of the barrel-shaped cavity. The column can have a length of 2-10mm and a diameter of 0.5-5 mm.
Furthermore, the periphery of the ratchet wheel 3 is provided with at least one elastic tooth, such as 1-8, which is tangent to the periphery of the ratchet wheel; in particular, when a plurality of elastic teeth are provided, the extending ends of the plurality of elastic teeth are oriented in the same direction, for example, in a clockwise direction or a counterclockwise direction at the same time. In one embodiment, the outer periphery of the ratchet wheel is provided with three elastic teeth which are tangent to the outer periphery of the ratchet wheel and extend towards the anticlockwise direction, the elastic teeth can rotate when the handle rotates clockwise, and the elastic teeth and the ratchet wheel groove on the inner wall of the barrel-shaped cavity form a clamping block when the handle rotates anticlockwise, and the elastic teeth do not rotate. The arrangement mode can avoid re-opening of the valve angle after tightening the valve angle of the artificial mitral valve, thereby having good fixing effect on the valve angle.
In one embodiment, the thread holding portion 46 may have a two-step structure, the first step is fixed on the lower periphery of the valve holding barrel-shaped cavity 41, the supporting surface 45 for supporting the mitral valve prosthesis c is located below the inner side of the second step, three thread holes 461a, 461b, 461c are circumferentially arranged on the second step, and the first step is provided with a thread passage 47 through which the tightening thread can be inserted from the protruding portion of the positioning core rod to the thread holes. Specifically, the line passage 47 may be axially provided on the outer side edge portion of the first stage.
Further, the width of the lower part of the valve supporting part is limited to be not contacted with valve leaflets after being assembled with the artificial mitral valve, and the aperture of the threading hole is 0.3-2 mm. After the three tightening threads are fixed to the positioning core bar 22, the other ends of the three tightening threads can respectively pass through the thread passage 47 of the first thread holding part (any one of the three thread holding parts), pass through the thread hole 461a (thread hole at the end part) of the first thread holding part, pass through the lower part of the valve angle b below the first thread holding part to the lower part of the adjacent valve angle, then pass through the thread hole 461b (thread hole adjacent to the thread hole 461 a) of the first thread holding part, pass through the thread hole 461c (thread hole adjacent to the thread hole 461 b) of the first thread holding part, and tie the end part of the valve angle to the tightening thread passing through the thread hole 461 c.
Further, a second thread cutting groove 462 is formed between two of the three spaced thread holes. Specifically, the second cutting line groove is disposed between the threading holes 461b and 461c, and has a depth limited not to form an axial through, a width of 0.3-2mm, and a length of 2-10 mm. The second tangential groove is beneficial to cutting off the tightening wire, so that the valve angle of the artificial mitral valve can be conveniently opened.
The setting of this holding line portion can realize radially tightening up the valve angle of artifical mitral valve through three tightening wires when the handle rotates to make the valve fix a position firmly on holding the lamella ware radially and axially, thereby avoid the valve angle to cause the damage because of the deformation is too big. In addition, the tightening resistance when tightening the petal angle is greatly reduced, thereby the operation is more convenient.
In addition, two sets of a pair of bulges distributed along the axial direction are respectively arranged in the corresponding areas of the periphery of the valve holding barrel-shaped cavity, and the valve hanging rack can be fixed between the pair of bulges due to the arrangement of the pair of bulges. The pair of protrusions facilitate securing the valve holder in the valve vial. In particular, the lower protrusion 52 may be larger than the upper protrusion 51, and a forming hole having a size matching or slightly larger than that of the upper protrusion 51 may be formed at a position of the lower protrusion 52 corresponding to the upper protrusion, thereby facilitating the formation of the upper protrusion 51 during the mold fabrication.
The following is a specific method of use of an embodiment of the invention. Firstly, the handle part 1 is connected with the core bar 2 through the tightening line, the specific operation mode is that one end of the tightening line firstly enters the corresponding second threading hole 214a of the core bar through the first threading hole 121a of the handle seat, passes through the positioning plate 21, then passes through the second threading hole 214b towards the handle part 1 to enter the first threading hole 121b, and then is knotted and fixed with the other end of the tightening line at the first threading hole 121b, and the connection and fixation of the handle part 1 and the core bar 2 are completed in the above steps. Next, the core bar to lobe angle connection is made, which requires three tightening wires a due to the three lobe angles. The method comprises the following specific steps: one end of one of the tightening wires can be wound around the cross beam from above one of the three cross beams 232 from below and then fastened to the end of the tightening wire, and then the tightening wire is threaded out of the tightening wire through hole 233 and wound around the protruding portion of the positioning core bar 22 from the through hole at the bottom of the barrel-shaped cavity, i.e., the columnar body 25, and then the tightening wire is threaded out of the wire passage 47, threaded through the wire hole 461a of the first wire holding part (the wire hole at the end) and then threaded through the lower portion of the petal angle below the first wire holding part to the lower portion of the adjacent petal angle, and then threaded through the wire hole 461b of the first wire holding part, and then threaded through the wire hole 461c of the first wire holding part and fastened the end of the tightening wire to the tightening wire threaded through the third wire hole 461 c. The remaining two lobe angles are then cinched together with two additional cinch wires in the same operation.
According to the connecting method of the valve holder for the artificial mitral valve, the handle part 1 and the core bar 2 are fixedly connected through one tightening line, and then the connection of the valve holder for the artificial mitral valve and the valve angle of the artificial mitral valve is realized through the other three tightening lines, when the contraction of the valve angle is to be realized in the transportation or operation process, because the clamping of the ratchet wheel 3 and the ratchet wheel groove 42 can only realize unidirectional rotation, in the embodiment, as shown in fig. 1, only clockwise rotation can be realized, and therefore, through clockwise rotation of the handle 13, the hook structure 24 of the core bar 2 is driven to clockwise slide in the sliding groove 43 in the barrel-shaped cavity 41, the cylindrical body 25 is driven to clockwise rotate, and a section of the tightening line from the cylindrical body to the valve angle is wound and contracted on the cylindrical body, so that the valve angle is contracted. When the valve holding device for the artificial mitral valve needs to be separated from the artificial mitral valve, the tightening wire is cut off in the first tangent slot to separate the handle part from the core rod, and then the remaining three connecting wires are cut off in the second tangent slot to separate the holding wire part from the artificial mitral valve.
The radial contraction of the mitral valve angle is realized through the combination relationship of all parts and the wire passing channel on the wire holding part, and the die has a simple structure, is easy to assemble and disassemble, and greatly reduces the manufacturing cost. When aiming at the mitral valves of different models, only the valve holding part of the corresponding model needs to be replaced, thereby greatly reducing the use cost.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.