CN210447284U - Artificial ring-on-mechanical valve for replacing mitral valve - Google Patents
Artificial ring-on-mechanical valve for replacing mitral valve Download PDFInfo
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- CN210447284U CN210447284U CN201920310133.7U CN201920310133U CN210447284U CN 210447284 U CN210447284 U CN 210447284U CN 201920310133 U CN201920310133 U CN 201920310133U CN 210447284 U CN210447284 U CN 210447284U
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Abstract
A mitral valve replacement prosthetic on-ring mechanical valve for implantation in the heart to replace a diseased mitral valve of the heart at the junction of the left atrium and left ventricle, comprising: a valve frame having a tubular portion matching the mitral annulus in the left ventricle, a pair of openable and closable leaflets mounted on the valve frame and accommodated in the tubular portion for controlling the one-way circulation of blood; and a suturing ring fixed on the tubular part and used for being connected with the mitral valve annulus in a suturing way, wherein the tubular part is also provided with an inflow port and an outflow port for blood to flow from the left atrium into the left ventricle, and the suturing ring is arranged at the outflow port.
Description
Technical Field
The utility model relates to an artificial mechanical valve, in particular to an on-ring mechanical valve for replacing a mitral valve.
Background
The heart valve includes mitral valve, tricuspid valve, aortic valve and pulmonary valve, wherein the mitral valve is located between the left atrium and the left ventricle for ensuring unidirectional blood flow from the left atrium to the left ventricle. Mitral valve disease is one of common heart valve diseases, the etiology of which comprises rheumatic, degenerative and infectious endocarditis, and the like, and mitral valve mechanical valve replacement is a common treatment means for treating the heart mitral valve disease.
The mitral valve includes leaflets, an annulus, chordae tendineae, papillary muscles and the left ventricular wall to which the papillary muscles are attached, and how to treat a diseased valve when performing valve replacement directly affects the patient's prognosis. To implant a prosthetic valve of the desired size, the mitral valve tissue (including leaflets and chordae tendineae) needs to be removed too much, but this can cause excessive post-operative left ventricular relaxation, leading to the occurrence of low-row syndrome, and thus the sub-valvular device of the mitral valve is preserved as much as possible during the operation to maintain the post-operative relatively desired left ventricular morphology and function. At present, in the process of placing, opening and closing various traditional mitral valve mechanical valves, the metal structure and the valve leaflets of a part of valve devices are positioned in the left ventricular outflow tract, and the structural design may result in that:
1. because part of the mechanical structure of the artificial valve is implanted in the left ventricle inflow passage, the selection of the model of the artificial mitral mechanical valve is limited.
2. When the mitral valve leaflets or the subvalvular device is excessively reserved, the chordae tendineae, papillary muscles and the like can block the movement of the mechanical valve, and the opening and closing functions of the mechanical valve are further influenced.
In order to solve the above problems, the remaining mitral valve structure must be folded and sutured during the operation, but this may make the mechanical valve difficult to implant, or the chordae tendineae may be displaced and lose their original function of maintaining the morphology of the left ventricle, or even the diastolic function of the left ventricle may be affected after the operation due to the excessive traction of the contracture chordae tendineae.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a solve above-mentioned traditional mitral valve mechanical valve structure can lead to the model to select the problem that is limited and mechanical leaflet motion is hindered by the device under the lamella, aim at provides a mitral valve replacement is with artifical mechanical valve on the ring.
The utility model provides a mitral valve replacement is with artifical mechanical valve on ring for implant heart in the replacement be located the heart mitral valve of left atrium and left ventricle juncture pathological change, a serial communication port, include: a valve frame having a tubular portion matching the mitral annulus in the left ventricle, a pair of openable and closable leaflets mounted on the valve frame and accommodated in the tubular portion for controlling the one-way circulation of blood; and a suturing ring fixed on the tubular part and used for being connected with the mitral valve annulus in a suturing way, wherein the tubular part is also provided with an inflow port and an outflow port for blood to flow from the left atrium into the left ventricle, and the suturing ring is arranged at the outflow port.
The utility model provides a mitral valve replacement is with artifical mechanical valve on ring can also have such characteristic, its characterized in that: wherein, the valve leaf is the slice, and when a pair of valve leaf all was perpendicular with the terminal surface of outflow port portion, the valve leaf was close to the bottommost of outflow port portion and the terminal surface of outflow port portion and is in the coplanar.
The utility model provides a mitral valve replacement is with artifical mechanical valve on ring can also have such characteristic, its characterized in that: wherein, the valve leaf is the slice, and when a pair of valve leaf all was perpendicular with the terminal surface of outflow port portion, the valve leaf was close to the most bottom of outflow port portion and is located and withdraw 1-2mm department along the axial tubular part of tubular part from the terminal surface of outflow port portion.
The utility model provides a mitral valve replacement is with artifical mechanical valve on ring can also have such characteristic, its characterized in that: wherein, the peripheral wall of the outflow port part is provided with an annular groove, and the sewing ring is fixed in the annular groove.
The utility model provides a mitral valve replacement is with artifical mechanical valve on ring can also have such characteristic, its characterized in that: wherein, the valve frame is also provided with a pair of convex parts which are symmetrically arranged and used for installing a pair of valve leaflets.
The utility model provides a mitral valve replacement is with artifical mechanical valve on ring can also have such characteristic, its characterized in that: the inner cross section of the tubular part is circular, two limiting groove groups which are arranged along the diameter of the tubular part in a bilateral symmetry mode are arranged on the inner wall of the protruding part, and each limiting groove group comprises two limiting grooves for mounting one valve leaflet.
The utility model provides a mitral valve replacement is with artifical mechanical valve on ring can also have such characteristic, its characterized in that: each valve leaf is provided with a straight edge and an arc edge, the straight edge is connected with the arc edge, two ends of the straight edge are respectively provided with a convex block, the two convex blocks of each valve leaf are respectively arranged in the two limiting grooves in the limiting groove group, so that the valve leaf can rotate along the straight edge of the valve leaf, and the maximum distance from the straight edge of each valve leaf to the arc edge of the valve leaf is larger than the inner radius of the tubular part.
The utility model provides a mitral valve replacement is with artifical mechanical valve on ring can also have such characteristic, its characterized in that: when the pair of valve leaflets are in a closed state, an included angle is formed between the pair of valve leaflets, and the included angle is an obtuse angle.
The utility model provides a mitral valve replacement is with artifical mechanical valve on ring can also have such characteristic, its characterized in that: wherein the valve frame is made of medical pyrolytic carbon, and the pair of valve leaflets are made of medical pyrolytic carbon.
The utility model provides a mitral valve replacement is with artifical mechanical valve on ring can also have such characteristic, its characterized in that: wherein the sewing ring is made of terylene.
Action and effect of the utility model
The utility model provides a mitral valve replacement is with mechanical valve on artificial ring has the setting on the valve frame and the complete a pair of leaflet that holds in the tubulose part for leaflet is in the inside of valve frame completely, and leaflet also is in inside the valve frame completely when the operation is complete, does not receive the interference of exterior structure, consequently no matter how many valvular devices under the operation process all can not cause the influence to the motion of leaflet, structure under the retention normal position mitral valve that can furthest, and need not too much folding or tractive leaflet and valvular structure device, it is better to maintaining postoperative left ventricle form and function.
And simultaneously, the utility model discloses the ring of sewing up of well artificial ring last mitral valve mechanical valve sets up at the discharge port portion, be located the bottommost of mechanical lamella on the whole artificial ring promptly, make it suture with the mitral valve ring and fix the back, mechanical lamella all is located the left atrium on the whole artificial ring, thereby guarantee that the arrangement of mechanical lamella on the whole artificial ring does not receive the influence of structure under the former mitral valve lamella, and the limitation that receives the valve ring size factor influences also littleer, make the model size that mechanical lamella implanted on the artificial ring have bigger selection range.
Drawings
FIGS. 1 and 6 are schematic views of the structure of a mechanical valve on a ring prosthesis for mitral valve replacement;
fig. 2 is a schematic structural view of a leaflet;
FIGS. 4 and 7 are schematic views showing the structure of the mechanical valve conduction state on the ring prosthesis for mitral valve replacement;
FIGS. 3 and 8 are schematic views showing the closed state of the mechanical valve on the ring prosthesis for mitral valve replacement;
FIG. 5 is a schematic view of the position of a mechanical valve on a prosthetic ring for mitral valve replacement in the heart;
FIG. 9 is a schematic view showing the arrangement of the position-limiting grooves; and
fig. 10 is a schematic view of the installation structure of the valve leaflet in the limiting groove.
Detailed Description
In order to make the technical means, creation features, achievement purposes and effects of the present invention easy to understand, the following embodiments are combined with the accompanying drawings to specifically illustrate the composition, working principle and beneficial effects of the elongated mitral valve mechanical valve provided by the present invention.
Fig. 1 and 6 are schematic views showing the structure of a mechanical valve on a prosthetic ring for mitral valve replacement.
As shown in fig. 1 and 6, the mitral valve replacement artificial on-ring mechanical valve 100 in the present embodiment has a valve frame 10, a pair of valve leaflets 20, and a sewing ring 30.
The petal holder 10 has a tubular portion in the shape of a circular tube and a pair of convex portions.
The tubular portion has an inflow port portion 11 and an outflow port portion 12 through which blood enters and exits. The end surfaces of the outflow end 12 are all planes, and the port parts are smooth circular arcs. The outer peripheral wall of the outlet port portion 12 has an annular groove thereon.
The pair of protruding portions includes two symmetrical protrusions provided on one side of the inflow port portion 11, and is formed integrally with the tubular portion using pyrolytic carbon for medical use.
Two groups of limiting groove groups are arranged on the inner walls of the pair of convex parts, the two groups of limiting groove groups are symmetrical along the diameter of the tubular part, each group of limiting groove groups comprises two limiting grooves 13 used for installing one valve leaflet 20, and the two limiting grooves 13 are respectively positioned on the two bulges.
Fig. 9 is a schematic distribution diagram of the limiting grooves.
As shown in fig. 6 and 9, each of the limiting grooves 13 includes two fan-shaped grooves that are centrosymmetric and have the same shape, the two fan-shaped grooves are disposed up and down along the axial direction of the tubular portion, and one radius of each fan-shaped groove is parallel to the axial direction of the tubular portion.
Fig. 2 is a schematic view of a leaflet structure.
As shown in fig. 3 to 4 and 6 to 8, the pair of openable and closable leaflets 20 of the present invention are accommodated in the tubular portion, and have inner two leaflets 20 bilaterally symmetrical with respect to the diameter of the tubular portion, for controlling the circulation of blood through the mechanical valve 100 on the artificial ring for mitral valve replacement.
As shown in fig. 2, the valve leaflet 20 is sheet-shaped, and has a straight side and an arc side matching with the shape of the inner wall of the tubular portion, and the two ends of the straight side are respectively provided with a convex block 21 matching with the limiting groove 13. The projection 21 has a projecting edge and a straight edge, both ends of which are respectively connected to one end of the straight edge and a corresponding end of the arc edge of the leaflet 20.
Fig. 10 is a schematic view of the installation structure of the valve leaflet in the limiting groove.
As shown in fig. 6, 9 and 10, the two protrusions 21 of each leaflet 20 are respectively snap-fitted into the two limiting grooves 13 of one limiting groove set, so that the leaflet 20 can rotate along a straight edge in the valve frame 10.
Specifically, one of the limiting grooves 13 includes two fan-shaped grooves, and the projection 21 of one end of one leaflet 20 is engaged in the fan-shaped groove on the upper side while a part of the arc side of the leaflet 20 is inserted in the fan-shaped groove on the lower side, whereby both ends of one leaflet 20 are mounted in the leaflet frame 10, so that the leaflet 20 can rotate about the axis formed by the projection 21 and the straight side portion of the leaflet 20. Meanwhile, a part of the curved edge of the leaflet 20 is embedded into the fan-shaped groove located at the lower side, so that the edge of the curved edge of the leaflet 20 can be tightly contacted with the leaflet frame 10 without affecting the rotation of the leaflet 20 (if such a structure is not adopted, the leaflet 20 rotates as shown in the figure).
Because one radius of each fan-shaped groove is parallel to the axial direction of the tubular part of the valve frame 10, when the valve leaflet 20 rotates to the vertical position (the position parallel to the axial direction of the tubular part of the valve frame 10), the convex block 21 and one part of the arc edge of the valve leaflet 20 are respectively contacted with the groove edges corresponding to the radii of the two fan-shaped grooves, so that the limiting is realized; on the other hand, the other radius of each sector groove has a certain angle with the axial direction of the tubular part of the valve frame 10, and when the valve leaflet 20 rotates to a position having a certain angle with the axial direction of the tubular part of the valve frame 10, the convex block 21 and a part of the arc edge of the valve leaflet 20 respectively contact with the groove edge corresponding to the other radius of the two sector grooves, so that the limiting is realized. That is, the structure of the limiting groove 13 as in the present embodiment enables the rotatable mounting of the leaflet 20 and the limitation of the rotation thereof.
Fig. 4 and 7 are schematic structural views showing the conduction state of the mechanical valve on the artificial ring for mitral valve replacement.
As shown in fig. 4 and 7, when the two leaflets 20 are parallel to each other and are both perpendicular to the end surface of the outflow port 12, the two leaflets 20 are in the maximum open/close state, the lowermost ends of the leaflets 20 close to the outflow port 12 and the end surface of the outflow port 12 are on the same plane, and at this time, the two radii parallel to the axial direction of the tubular portion in the restriction grooves 13 restrict the leaflets 20, and blood can flow from the left atrium into the left ventricle through the mechanical valve-on-ring prosthesis 100 for mitral valve replacement.
If necessary, when the two leaflets 20 are in the maximum open-close state, the lowermost ends of the leaflets 20 near the outflow port portion 12 may be set at a position retracted by 1-2mm, preferably 2mm, from the end surface of the outflow port portion 12 along the axial direction of the tubular portion.
Fig. 3 and 8 are schematic structural views showing a mechanical valve closing state on a prosthetic ring for mitral valve replacement.
As shown in fig. 3 and 8, when the two straight sides of the two leaflets 20 completely adhere to each other and the two arc sides of the two leaflets 20 completely adhere to the inner wall of the tubular portion, the two leaflets 20 are in a closed state, and at this time, the other two radii in the limiting groove 13 limit the two leaflets 20, an angle formed between the two leaflets 20 is greater than 90 ° and less than 180 °, and blood cannot pass through the mitral valve to replace the mechanical valve 100 on the artificial ring.
Both leaflets 20 are made of pyrolytic carbon for medical use.
The sewing ring 30 has a fixing ring for fixing in the annular groove and a skirt for sewing, the skirt and the fixing ring being made of a polyester integrally woven fabric.
The skirt is annular, and the outer surface has a plurality of strip-shaped bulges which are parallel to the axial direction of the tubular part.
The plurality of strip-shaped bulges are uniformly distributed along the circumferential direction of the skirt edge.
Fig. 5 is a schematic view of a position in the heart.
As shown in fig. 5, when the replacement operation is performed, the suture loop 30 is sutured to the mitral valve so that the mechanical valve 100 is fixed in the left atrium over the entire artificial annulus, forming an supraannular valve.
Effects and effects of the embodiments
The utility model provides a mitral valve replacement is with mechanical valve on artificial ring has the setting on the valve frame and the complete a pair of leaflet that holds in the tubulose part for leaflet is in the inside of valve frame completely, and leaflet also is in inside the valve frame completely when the operation is complete, does not receive the interference of exterior structure, consequently no matter how many valvular devices under the operation process all can not cause the influence to the motion of leaflet, structure under the retention normal position mitral valve that can furthest, and need not too much folding or tractive leaflet and valvular structure device, it is better to maintaining postoperative left ventricle form and function.
And simultaneously, the utility model discloses the ring of sewing up of well artificial ring last mitral valve mechanical valve sets up at the discharge port portion, be located the bottommost of mechanical lamella on the whole artificial ring promptly, make it suture with the mitral valve ring and fix the back, mechanical lamella device all is located the left atrium on the whole artificial ring, thereby guarantee that the arrangement of mechanical lamella on the whole artificial ring does not receive the influence of structure under the former mitral valve lamella, and the limitation that receives the valve ring size factor influences also littleer, make the model size that prosthetic valve implanted have bigger selection range.
Furthermore, because the maximum distance from the straight edge to the arc edge of the valve leaflet is greater than the inner radius of the tubular part, when the two valve leaflets are in a closed state, an included angle with an obtuse angle is formed between the two valve leaflets, and the arrangement ensures that the resistance received when blood flows through the valve leaflets is relatively small, so that the closed valve leaflets can be more easily flushed away.
The setting of spacing recess makes two valve leafs only can move in fixed region, and the valve leaf displacement of avoiding causes the influence each other too big.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (10)
1. A mitral valve replacement prosthetic on-ring mechanical valve for implantation in the heart to replace a diseased mitral valve of the heart at the junction of the left atrium and left ventricle, comprising:
a valve frame having a tubular portion that mates with a mitral valve annulus in the left ventricle,
a pair of openable and closable leaflets mounted on the leaflet frame and accommodated in the tubular portion for controlling one-way circulation of blood; and
a suturing ring secured to the tubular portion for suturing connection with the mitral annulus,
wherein the tubular portion further has an inflow port and an outflow port for blood to flow from the left atrium into the left ventricle,
the suture loop is arranged at the outflow port part.
2. The mechanical valve on a prosthetic ring for mitral valve replacement of claim 1, wherein:
wherein, the valve leaf is sheet-shaped, when a pair of valve leaves are both vertical to the end surface of the outflow port part, the bottommost end of the valve leaf close to the outflow port part and the end surface of the outflow port part are in the same plane.
3. The mechanical valve on a prosthetic ring for mitral valve replacement of claim 1, wherein:
wherein, the valve leaf is sheet-shaped, when a pair of the valve leaves are both vertical to the end surface of the outflow port part, the lowest end of the valve leaf close to the outflow port part is positioned at the position which is retracted from the end surface of the outflow port part to the inside of the tubular part by 1-2mm along the axial direction of the tubular part.
4. The mechanical valve on a prosthetic ring for mitral valve replacement of claim 1, wherein:
wherein the peripheral wall of the outflow port part is provided with an annular groove,
the sewing ring is fixed in the annular groove.
5. The mechanical valve on a prosthetic ring for mitral valve replacement of claim 1, wherein:
wherein the valve frame is also provided with a pair of symmetrically arranged convex parts for installing a pair of valve leaflets.
6. The mechanical valve on a prosthetic ring for mitral valve replacement of claim 5, wherein:
wherein the tubular portion has a circular inner cross-section,
two groups of limiting groove groups which are arranged along the diameter of the tubular part in a bilateral symmetry way are arranged on the inner wall of the convex part,
each group of limiting groove groups comprises two limiting grooves for mounting one valve leaflet.
7. The mechanical valve on a prosthetic ring for mitral valve replacement of claim 6, wherein:
wherein each valve leaf has a straight edge and an arc edge, the straight edge is connected with the arc edge,
two ends of the straight edge are respectively provided with a convex block,
the two convex blocks of each valve leaf are respectively arranged in the two limit grooves in one group of limit groove groups, so that the valve leaf can rotate along the straight edge of the valve leaf,
the maximum distance from the straight edge of each leaflet to the curved edge of that leaflet is greater than the inner radius of the tubular portion.
8. The mechanical valve on a prosthetic ring for mitral valve replacement of claim 1, wherein:
when the pair of valve leaflets are in a closed state, an included angle is formed between the pair of valve leaflets, and the included angle is an obtuse angle.
9. The mechanical valve on a prosthetic ring for mitral valve replacement of claim 1, wherein:
wherein the valve frame is made of medical pyrolytic carbon,
the pair of valve leaflets are valve leaflets made of medical pyrolytic carbon.
10. The mechanical valve on a prosthetic ring for mitral valve replacement of claim 1, wherein:
wherein the sewing ring is made of terylene.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018203404871 | 2018-03-13 | ||
| CN201820340487 | 2018-03-13 |
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| CN210447284U true CN210447284U (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920310133.7U Active CN210447284U (en) | 2018-03-13 | 2019-03-12 | Artificial ring-on-mechanical valve for replacing mitral valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109771098A (en) * | 2018-03-13 | 2019-05-21 | 唐杨烽 | A kind of mitral valve replacement manually mechanical prosthetic valve on ring |
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2019
- 2019-03-12 CN CN201920310133.7U patent/CN210447284U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109771098A (en) * | 2018-03-13 | 2019-05-21 | 唐杨烽 | A kind of mitral valve replacement manually mechanical prosthetic valve on ring |
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