CN117357306A

CN117357306A - Valve grabbing device and valve leaflet repairing device

Info

Publication number: CN117357306A
Application number: CN202210764386.8A
Authority: CN
Inventors: 周庆亮; 霍美俊; 孟坚
Original assignee: Beijing Medipeak Medical Technology Co ltd
Current assignee: Beijing Medipeak Medical Technology Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2024-01-09

Abstract

The application relates to a valve grabbing device, which comprises a valve supporting mechanism and a valve pressing mechanism; the valve supporting mechanism comprises a first handle, a first connecting pipe, a valve supporting ring and a loading pipe; the first connecting pipe is arranged on the first handle, the loading pipe is sleeved on the first connecting pipe in a sliding way, the valve supporting ring is contracted in the loading pipe, and the valve supporting ring is connected with one end, far away from the first handle, of the first connecting pipe; the valve pressing mechanism comprises a second handle, a second connecting pipe and a valve pressing ring; the second connecting pipe is sleeved in the first connecting pipe, the second connecting pipe and the first connecting pipe can slide relatively, and the length of the second connecting pipe is longer than that of the first connecting pipe; one end of the second connecting pipe is connected with a second handle arranged outside the first handle; the valve pressing ring is contracted in the first connecting pipe, and the valve pressing ring is connected with one end of the second connecting pipe far away from the second handle; the first handle and the second handle are provided with through holes. The positioning accuracy is improved, and the success rate and the repairing effect of the operation are improved. In addition, the application also provides a valve leaflet repairing device.

Description

Valve grabbing device and valve leaflet repairing device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a valve grabbing device and a valve leaflet repairing device.

Background

The mitral valve is a one-way valve located between the left atrium and the left ventricle of the heart, and a normally healthy mitral valve can control blood flow from the left atrium to the left ventricle while avoiding blood flow from the left ventricle to the left atrium. The mitral valve includes a pair of leaflets, called anterior and posterior, that when the edges of the anterior and posterior leaflets are brought together, the mitral valve can close completely, preventing blood from flowing from the left ventricle to the left atrium.

When the leaflets of the mitral valve or their associated structures undergo an organic or functional change, the anterior and posterior leaflets of the mitral valve do not coapt properly, whereby the mitral valve does not close completely when the left ventricle of the heart contracts, resulting in regurgitation of blood from the left ventricle to the left atrium, causing a series of pathophysiological changes known as "mitral regurgitation".

Research shows that the long-term effect of surgical treatment on mitral valve lesions is better than that of drug treatment, however, the patients with mitral stenosis caused by rheumatic fever are lighter in age, and the quality of life is obviously affected by premature replacement of the valve; meanwhile, for high-risk surgical patients with advanced combined multisystem diseases, the surgical risk is high, the survival benefit is little, and European data show that the surgical success rate of the patients is only 50 percent, and the surgical success rate of patients with severe functional reflux is even lower than 16 percent. Minimally invasive treatment of the mitral valve is therefore always the focus of the clinician's search.

The prior valve leaflet repairing device can have good treatment effect on the general prolapse of the mitral valve leaflet, but for the case of serious prolapse of the leaflet, the condition that the valve is torn due to the fact that the prolapse position of the leaflet is forced to turn over to the atrium and cannot be repaired or the position of a puncture point is inaccurate can occur when the prolapse position of the leaflet is positioned by an instrument.

Disclosure of Invention

The invention aims to provide a valve grabbing device and a valve leaflet repairing device so as to solve the problems.

In order to achieve the above object of the present invention, the following technical solutions are adopted:

in a first aspect, the present application provides a valve grasper comprising a valve support mechanism and a valve compression mechanism;

the valve supporting mechanism comprises a first handle, a first connecting pipe, a valve supporting ring and a loading pipe;

the first connecting pipe is arranged on the first handle, the loading pipe is sleeved on the first connecting pipe in a sliding way, the valve supporting ring is contracted in the loading pipe, and the valve supporting ring is connected with one end, far away from the first handle, of the first connecting pipe;

a via hole communicated with the first connecting pipe is formed in the first handle;

the valve pressing mechanism comprises a second handle, a second connecting pipe and a valve pressing ring;

the second connecting pipe is sleeved inside the first connecting pipe, the second connecting pipe and the first connecting pipe can slide relatively, and the length of the second connecting pipe is longer than that of the first connecting pipe;

one end of the second connecting pipe penetrates out of the through hole and is connected with the second handle arranged outside the first handle; the valve pressing ring is contracted in the first connecting pipe, and the valve pressing ring is connected with one end, far away from the second handle, of the second connecting pipe;

through holes are formed in the first handle and the second handle.

Further, an elastic reset piece is sleeved on the second connecting pipe between the first handle and the second handle, and the elastic reset piece connects the first handle with the second handle.

Further, the valve supporting ring comprises a valve supporting ring body and a valve supporting rod body connected with the valve supporting ring body, the valve supporting rod body is arranged at one end of the first connecting pipe far away from the first handle, and the length direction of the valve supporting rod body is consistent with the length direction of the first connecting pipe;

the valve supporting ring body comprises two valve supporting half rings, the two valve supporting half rings are symmetrically arranged along the axis of the first connecting pipe, a gap between one pair of opposite end points of the two valve supporting half rings is used as a line yielding hole, and the other pair of opposite end points of the two valve supporting half rings are correspondingly connected with the valve supporting rod body through an inward bending transition rod; or alternatively, the first and second heat exchangers may be,

the valve supporting ring body comprises a valve supporting semi-ring body, and the valve supporting semi-ring body is correspondingly connected with the valve supporting rod body through an inner bending transition rod.

Further, a transition arc is arranged between the flap supporting semi-ring and the inner bending transition rod, and a transition arc is arranged between the inner bending transition rod and the flap supporting rod body.

Further, the valve pressing ring comprises a valve pressing ring body and a valve pressing rod body connected with the valve pressing ring body, the valve pressing rod body is installed at one end, far away from the second handle, of the second connecting pipe, and the length direction of the valve pressing rod body is consistent with the length direction of the second connecting pipe.

Further, the valve pressing ring body is a non-closed valve pressing ring body, and the valve pressing rod body is correspondingly connected with two end points of the non-closed valve pressing ring body;

the non-closed valve pressing ring body is provided with V-shaped buffer parts at positions corresponding to two end points of the non-closed valve pressing ring body, and the closed ends of the V-shaped buffer parts are arranged in a direction away from the valve pressing rod body;

the valve pressing rod body is connected with two endpoints of one non-closed valve pressing ring body through a transitional arc.

Further, the valve pressing ring body comprises two non-closed valve pressing ring bodies, the two non-closed valve pressing ring bodies are oppositely arranged, and one pair of adjacent end points of the two non-closed valve pressing ring bodies are connected together;

the valve pressing rod body is correspondingly connected with the other pair of adjacent endpoints of the two non-closed valve pressing ring bodies;

one pair of adjacent endpoints of the two non-closed valve pressing ring bodies are connected through a V-shaped buffer part, and the closed end of the V-shaped buffer part is arranged towards the direction close to the valve pressing rod body;

the valve pressing rod body is connected with the other pair of adjacent endpoints of the two non-closed valve pressing ring bodies through a transitional arc.

Further, a sealing pressing sheet is arranged on the end face, facing the second handle, of the first handle, and the penetrating through hole in the first handle penetrates through the sealing pressing sheet.

Further, a stepped hole is formed in the through hole, a sealing gasket is arranged in the stepped hole, and one end of the second connecting pipe penetrates out of the sealing gasket and is connected with the second handle arranged on the outer side of the first handle.

In a second aspect, the present application provides a leaflet repair device comprising a leaflet repair apparatus and a valve grasper of any one of the above;

the prosthetic component of the valve leaflet prosthetic appliance passes through the through hole of the second handle, the through hole of the first handle, the valve supporting ring and the valve pressing ring in sequence, positions and punctures the prolapsed valve leaflet, implants artificial chordae tendineae and repairs the prolapsed valve leaflet.

By adopting the technical scheme, the invention has the following beneficial effects:

when the valve grabbing device is used, firstly, the prolapse position of the valve leaflet is determined through an ultrasonic means, after the prolapse position is determined, the valve grabbing device is used, and the ultrasonic means are also needed in the process of the valve grabbing device being inserted into the heart, because the operation is completed under the minimally invasive condition, in order to facilitate the conveying of the valve supporting ring and the valve pressing ring, the valve supporting ring is contracted in the loading tube, the valve pressing ring is contracted in the first connecting tube, then the valve grabbing device is inserted into the heart, after the heart is inserted, the loading tube relatively slides along the first connecting tube, and the valve supporting ring is gradually exposed out of the loading tube until the valve supporting ring is completely unfolded; secondly, gradually reducing the distance between the first handle and the second handle, so that relative sliding occurs between the first connecting pipe and the second connecting pipe, and the valve pressing ring is gradually exposed from the first connecting pipe under the drive of the second connecting pipe until the valve pressing ring is completely unfolded above the valve supporting ring. The distance between the expanded valve support ring and the valve pressing ring is inversely proportional to the distance between the first handle and the second handle.

The prolapse position of the valve leaflet enters between the expanded supporting valve ring and the valve pressing ring, and then the distance between the first handle and the second handle is gradually increased, so that the first connecting pipe and the second connecting pipe slide relatively, the distance between the supporting valve ring and the valve pressing ring is gradually reduced, the prolapse position of the valve leaflet is gradually clamped, and the capture of the prolapse position of the valve leaflet, namely the target puncture point position, namely the artificial chordae targeting point position, is completed.

After the position of the puncture point (artificial chordae targeting point) of the prolapsed valve leaflet is determined, the existing valve leaflet repair instrument is used, and the repair component of the valve leaflet repair instrument sequentially passes through the through hole on the second handle, the through hole on the first handle, the valve supporting ring and the valve pressing ring to position and puncture the prolapsed valve leaflet, and the artificial chordae is implanted, so that the prolapsed valve leaflet is repaired.

Compared with the existing mode of directly propping up the prolapsed valve leaflet by adopting the valve leaflet repairing instrument, the valve grabbing device clamps the prolapsed valve leaflet at the prolapsed position through the valve supporting ring and the valve pressing ring, so that the stress on the prolapsed position of the valve leaflet is avoided to overturn the atrium, the positioning difficulty of the valve leaflet repairing instrument at the prolapsed valve leaflet is reduced, the positioning accuracy is improved, the accurate positioning on the prolapsed position of the valve leaflet can be realized, puncture is implemented, the situation that the valve is torn due to the prolapse overturning of the valve leaflet and the inaccuracy of the position of a puncture point is avoided, and the success rate of operation and the repairing effect can be obviously improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of an initial state structure of a first valve gripper provided in the present application;

FIG. 2 is a schematic illustration of the release of the valve support ring of the first valve grab provided herein;

FIG. 3 is a schematic illustration of the configuration of the release of the valve pressing ring of the first valve gripper provided herein;

FIG. 4 is a schematic view of the structure of the valve supporting ring and the valve pressing ring of the first valve grabbing device in a valve clamping state;

FIG. 5 is a first perspective view of a first valve grab provided herein;

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

FIG. 7 is a second perspective view of the first valve grab provided herein;

FIG. 8 is a partial enlarged view at B in FIG. 7;

FIG. 9 is a first perspective view of a second valve grab provided herein;

FIG. 10 is an enlarged view of a portion of FIG. 9 at C;

FIG. 11 is a second perspective view of a second valve grab provided herein;

fig. 12 is an enlarged view of D in fig. 11;

fig. 13 is a schematic structural view of a leaflet repair device provided herein.

Reference numerals: 1-a flap mechanism; 2-a valve pressing mechanism; 11-a first handle; 12-a first connection tube; 13-a backing ring; 3-via holes; 21-a second handle; 22-a second connecting tube; 23-pressing the valve annulus; 4-a through-hole; 5-an elastic restoring member; 6-an annular groove; 131-supporting the flap ring body; 132-a valve-supporting rod body; 133-inner bend transition bar; 7-V-shaped buffer parts; 71-closed end; 8-transition arc; 231-pressing the flap ring body; 232-pressing a valve rod body; 9-leaflet repair apparatus; 10-sealing and tabletting; 14-loading tube; 15-a gasket; 16-step holes; 17-heat-shrinkable sleeve; 18-let wire hole.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1-12, the valve grabbing device comprises a valve supporting mechanism 1 and a valve pressing mechanism 2;

the valve supporting mechanism 1 comprises a first handle 11, a first connecting pipe 12, a valve supporting ring 13 and a loading pipe 14;

the first connecting pipe 12 is arranged on the first handle 11, the loading pipe 14 is sleeved on the first connecting pipe 12 in a sliding way, the supporting valve ring 13 is contracted in the loading pipe 14, and the supporting valve ring 13 is connected with one end of the first connecting pipe 12 far away from the first handle 11;

a via hole 3 communicated with the first connecting pipe 12 is arranged in the first handle 11;

the valve pressing mechanism 2 comprises a second handle 21, a second connecting pipe 22 and a valve pressing ring 23;

the second connecting pipe 22 is sleeved inside the first connecting pipe 12, the second connecting pipe 22 and the first connecting pipe 12 can slide relatively, and the length of the second connecting pipe 22 is longer than that of the first connecting pipe 12;

one end of the second connecting pipe 22 penetrates out of the through hole 3 and is connected with a second handle 21 arranged outside the first handle 11; the valve pressing ring 23 is contracted in the first connecting pipe 12, and the valve pressing ring 23 is connected with one end of the second connecting pipe 22 away from the second handle 21;

the first handle 11 and the second handle 21 are provided with through holes 4.

When the valve grabbing device is used, firstly, the prolapse position of the valve leaflet is determined through an ultrasonic means, after the prolapse position is determined, the valve grabbing device is used, and the ultrasonic means are also needed to be used in the process of the valve grabbing device being inserted into the heart, because the operation is to be completed under the minimally invasive condition, in order to facilitate the conveying of the valve supporting ring 13 and the valve pressing ring 23, the valve supporting ring 13 is contracted in the loading tube 14, the valve pressing ring 23 is contracted in the first connecting tube 12, then the valve grabbing device is inserted into the heart, after the heart is inserted, the loading tube 14 slides relatively along the first connecting tube 12, and the valve supporting ring 13 is gradually exposed out of the loading tube 14 until the valve supporting ring is fully unfolded; secondly, the distance between the first handle 11 and the second handle 21 is gradually reduced, so that the first connecting pipe 12 and the second connecting pipe 22 slide relatively, and the valve pressing ring 23 is gradually exposed from the first connecting pipe 12 under the driving of the second connecting pipe 22 until the valve pressing ring is completely unfolded above the valve supporting ring 13. The distance between the expanded flap ring 13 and the pressure flap ring 23 is inversely proportional to the distance between the first handle 11 and the second handle 21 (i.e., the smaller the distance between the first handle 11 and the second handle 21, the greater the distance between the flap ring 13 and the pressure flap ring 23).

The prolapse position of the valve leaflet enters between the expanded supporting valve ring 13 and the valve pressing ring 23, and then the distance between the first handle 11 and the second handle 21 is gradually increased, so that the relative sliding occurs between the first connecting pipe 12 and the second connecting pipe 22, the distance between the supporting valve ring 13 and the valve pressing ring 23 is gradually reduced, the prolapse position of the valve leaflet is gradually clamped, and the capture of the prolapse position of the valve leaflet, namely the target puncture point position, namely the artificial tendon targeting point position, is completed.

After the position of the puncture point (artificial chordae targeting point) of the prolapsed leaflet is determined, by means of the existing leaflet repair apparatus, the repair component of the leaflet repair apparatus sequentially passes through the through hole 4 on the second handle 21, the through hole 4 on the first handle 11, the supporting annulus 13 and the pressing annulus 23, and positions and punctures the prolapsed leaflet, and the artificial chordae is implanted, so that the prolapsed leaflet is repaired.

Compared with the existing mode of directly propping up the prolapsed valve leaflet by adopting the valve leaflet repairing instrument, the valve grabbing device clamps the prolapsed position of the valve leaflet through the valve supporting ring 13 and the valve pressing ring 23, so that the stress on the prolapsed position of the valve leaflet is avoided to overturn towards the atrium, the positioning difficulty of the valve leaflet repairing instrument on the prolapsed valve leaflet is reduced, the positioning accuracy is improved, the accurate positioning on the prolapsed position of the valve leaflet can be realized, puncture is implemented, the situation that the valve is torn due to the fact that the prolapsed overturning of the valve leaflet cannot be implemented, or the situation that the position of a puncture point is inaccurate is avoided, and the success rate of operation and the repair effect can be obviously improved.

Specifically, the second connecting pipe 22 between the first handle 11 and the second handle 21 is sleeved with an elastic restoring member 5, and the elastic restoring member 5 connects the first handle 11 and the second handle 21 together.

Holding the first handle 11 and the second handle 21, gradually shrinking the distance between the first handle 11 and the second handle 21, gradually increasing the distance between the supporting valve ring 13 and the valve pressing ring 23, gradually compressing the elastic restoring member 5, loosening the first handle 11 and the second handle 21 when the prolapse position of the valve leaf enters between the supporting valve ring 13 and the valve pressing ring 23, gradually increasing the distance between the first handle 11 and the second handle 21 under the driving of the reverse restoring force of the elastic restoring member 5, gradually decreasing the distance between the supporting valve ring 13 and the valve pressing ring 23, automatically clamping the prolapse position of the valve leaf, and completing the capturing of the prolapse position of the valve leaf.

It should be noted that, in the valve grabbing device of the present application, since the expanded supporting ring 13 and the expanded pressing ring 23 have a mutual limiting effect, the elastic restoring member 5 cannot be completely restored under the driving of its own reverse restoring force.

The elastic reset piece 5 is arranged, the function of a preset clamping force is achieved on the expanded supporting valve ring 13 and the expanded pressing valve ring 23, the distance between the supporting valve ring 13 and the pressing valve ring 23 is adjusted more flexibly and conveniently, the elastic reset piece 5 is used for enabling the supporting valve ring 13 and the pressing valve ring 23 to automatically clamp the prolapse position of the valve leaflet, manual operation is not needed, and operation difficulty is reduced.

Specifically, the valve supporting ring 13 comprises a valve supporting ring body 131 and a valve supporting rod body 132 connected with the valve supporting ring body 131, the valve supporting rod body 132 is installed on the outer wall of one end of the first connecting pipe 12 far away from the first handle 11 by adopting a heat shrinkage sleeve 17, and the length direction of the valve supporting rod body 132 is consistent with the length direction of the first connecting pipe 12;

in use, the flap ring 131 has two configurations;

the first structure: the flap ring 131 includes two flap ring halves, two flap ring halves set up along the axis symmetry of first connecting pipe 12, the clearance between one of them a pair of opposite extreme points of two flap ring halves is as letting line hole 18 (let the setting of line hole 18, make behind the artificial chordae implant heart, the flap ware of grabbing of this application, the back of withdrawing a back, take place to interfere between the chordae of artificial chordae and two flap ring halves, artificial chordae can follow the letting line hole 18 between two flap ring halves and avoid, guarantee the withdrawal of the flap ware of this application can be smooth), another pair of opposite extreme points of two flap ring halves is through buckling transition rod 133 and flap rod 132 correspondence connection in, two flap ring halves are set up with flap rod 132 is preferably perpendicular.

The second structure: the valve supporting ring body 131 comprises a valve supporting half ring, the valve supporting half ring is correspondingly connected with the valve supporting rod body 132 through an inner bending transition rod 133, and the valve supporting half ring and the valve supporting rod body 132 are preferably arranged vertically.

Specifically, a transition arc 8 is arranged between the flap half ring and the inner bending transition rod 133, so that the connection between the inner bending transition rod 133 and the flap half ring is smoother. A transition arc 8 is arranged between the inner bending transition rod 133 and the flap rod body 132, so that the connection between the inner bending transition rod 133 and the flap rod body 132 is smoother; therefore, the damage to the valve leaflet is avoided, and the use safety is ensured.

In the in-service use, considering loading tube 14 along the in-process of the relative slip of first connecting tube 12, hold in the palm the lamella and can resume the state of expansion smoothly after exposing from loading tube 14, hold in the palm the lamella half of this application and adopt nickel titanium alloy wire to make, utilize nickel titanium alloy wire's memory characteristic, guarantee to hold in the palm the lamella and can resume the state of expansion smoothly for hold in the palm the transportation of lamella can be intervened in the heart under the minimally invasive condition, reduce the intervention size of holding in the palm the lamella from this, reduce the wound.

Considering the overall situation of the valve supporting ring 13, the valve supporting semi-ring, the valve supporting rod body 132, the inner bending transition rod 133 and the transition arc 8 are of an integrated structure, and the valve supporting rod body 132, the inner bending transition rod 133 and the transition arc 8 are all made of nickel-titanium alloy wires, so that the valve supporting ring 13 is integrally made of nickel-titanium alloy wires.

In the actual use process, the valve pressing ring 23 has two structures, and the two structures are respectively matched with the two structures of the valve supporting ring body 131, so that the valve pressing ring can be used for mitral valve chordae tendineae reconstruction and mitral valve edge-to-edge repair.

As shown in fig. 9-12, when the proposed valve grasping device is used for a two-clamp chordae tendineae reconstruction, the valve supporting ring body 131 adopts a second structure (the valve supporting ring body 131 comprises a valve supporting half ring). The valve pressing ring 23 comprises a valve pressing ring body 231 and a valve pressing rod body 232 connected with the valve pressing ring body 231, the valve pressing rod body 232 is arranged at one end of the second connecting pipe 22 far away from the second handle 21, and the length direction of the valve pressing rod body 232 is consistent with the length direction of the second connecting pipe 22;

specifically, the valve pressing ring 231 is a non-closed valve pressing ring, the valve pressing rod 232 and the non-closed valve pressing ring are preferably arranged vertically, and the valve pressing rod 232 is correspondingly connected with two endpoints of the non-closed valve pressing ring;

the closed end 71 of the V-shaped buffer part 7,V-shaped buffer part 7 is arranged at the position of the non-closed valve pressing ring body corresponding to the two end points of the non-closed valve pressing ring body and is arranged in the direction away from the valve pressing rod body 232;

the two endpoints of the valve pressing rod body 232 and the two endpoints of the non-closed valve pressing ring body are connected through the transition arc 8, the transition arc 8 enables the connection between the non-closed valve pressing ring body and the two valve pressing rod bodies 232 to be smoother, damage to valve leaves is avoided, and use safety is guaranteed.

The positions of the non-closed valve pressing ring body corresponding to the two end points of the non-closed valve pressing ring body are provided with V-shaped buffer parts 7, and the V-shaped buffer parts 7 have the following functions:

the action is as follows: stress concentration is reduced;

since the operation is required to be completed under the minimally invasive condition, a non-closed valve pressing ring body needs to be flattened, so that the non-closed valve pressing ring body is contracted in the first connecting tube 12, and in this process, the positions of two end points corresponding to the non-closed valve pressing ring body on the non-closed valve pressing ring body are the positions of stress concentration points of the valve pressing ring body 231.

The closed end 71 of the V-shaped buffer part 7,V-shaped buffer part 7 which is arranged at the position of the stress concentration point in a closing way is arranged in the direction away from the valve pressing rod body 232; therefore, the V-shaped buffer part 7 can play a role in buffering and dispersing the stress received by the stress concentration point of one non-closed valve pressing ring body, and effectively reduces the stress received by the stress concentration point of one non-closed valve pressing ring body.

By the arrangement, the non-closed pressure valve ring body cannot break at the stress concentration point, so that the structural integrity of the non-closed pressure valve ring body is ensured, and the normal use of the non-closed pressure valve ring body is ensured.

The second action is: the bending is convenient;

the valve grabbing device has the advantages that the V-shaped buffer part 7 plays a role in a preset bending path, so that a non-closed valve pressing ring body can be bent along the V-shaped buffer part 7 in the process of being flat.

The third action is: after release, the device is unfolded smoothly;

since the included angle of the V-shaped buffer portion 7 gradually decreases and the restoring opening force between the V-shaped buffer portions 7 gradually increases in the process that one non-closed valve annulus is changed into a flat state along the V-shaped buffer portion 7, when one non-closed valve annulus is released from the first connecting tube 12, the V-shaped buffer portion 7 can be smoothly unfolded under the restoring opening force.

When the valve grasping device is used for the two-clamp chordae tendineae reconstruction operation, the mitral valve chordae tendineae reconstruction operation only needs to implant the artificial chordae tendineae at the prolapsed position of a single prolapsed valve leaflet (anterior leaflet or posterior leaflet).

Thus, a valve-supporting half ring is used in cooperation with a non-closed valve-pressing ring body to clamp the prolapsed position of the prolapsed valve leaflet.

Then, a valve leaflet repairing instrument is used, a repairing part of the valve leaflet repairing instrument enters from the through hole 4 of the second handle 21 and the through hole 4 of the first handle 11 according to the determined puncture point position on the prolapsed valve leaflet, and punctures the determined puncture point position through a valve supporting semi-ring and a non-closed valve pressing ring body, and the artificial chordae tendineae are implanted for repairing.

It should be noted that, when the valve grasping device is used for the two-clamp-valve chordae reconstruction operation, the above operation needs to be completed by means of an ultrasonic device, and how to operate is the prior art and is not repeated.

As shown in fig. 5-8, when the proposed valve grasping device is used in mitral valve edge-to-edge repair, the valve supporting ring body 131 adopts a first configuration (the valve supporting ring body 131 includes two valve supporting half rings). The valve pressing ring body 231 comprises two non-closed valve pressing ring bodies, the two non-closed valve pressing ring bodies are positioned in the same plane perpendicular to the first connecting pipe 12, the two non-closed valve pressing ring bodies are oppositely arranged, and one pair of adjacent end points of the two non-closed valve pressing ring bodies are connected together;

the valve pressing rod body 232 is vertically arranged with the two non-closed valve pressing ring bodies, and the valve pressing rod body 232 is correspondingly connected with the other pair of adjacent end points of the two non-closed valve pressing ring bodies;

one pair of adjacent endpoints of the two non-closed valve pressing ring bodies are connected through a V-shaped buffer part 7, and a closed end 71 of the V-shaped buffer part 7 is arranged towards the direction approaching to the valve pressing rod body 232;

the valve pressing rod body 232 is connected with the other pair of adjacent end points of the two non-closed valve pressing ring bodies through a transition circular arc 8.

When the valve grabbing device is used for the mitral valve edge-to-edge repair, the edges of the mitral valve, which cannot be normally closed by the anterior leaflet and the posterior leaflet, are fixed together in a sewing or clamping mode to form a double-hole structure, so that the gap between the valve leaflets is reduced, and the backflow amount is eliminated or reduced.

Therefore, two valve supporting semi-rings are matched with two non-closed valve pressing rings to clamp the front leaf and the rear leaf respectively, so that the prolapsed positions of the front leaf and the rear leaf, namely target puncture point positions, namely artificial tendon targeting points, are captured.

And then, using two valve leaflet repairing apparatuses, wherein the repairing parts of the two valve leaflet repairing apparatuses respectively enter from the through hole 4 of the second handle 21 and the through hole 4 of the first handle 11 according to the determined puncture points on the front leaf and the rear leaf, penetrate through the valve supporting semi-rings and the non-closed valve pressing ring bodies on the corresponding sides, puncture the determined puncture points, implant artificial chordae, and repair.

It should be noted that, when the valve grabbing device is used for mitral valve edge-to-edge repair, the above operation needs to be completed by means of an ultrasonic device, and how to perform the operation is the prior art and is not repeated.

One pair of adjacent end points of the two non-closed valve pressing rings are connected through the V-shaped buffer part 7, and the functions are as follows:

the action is as follows: stress concentration is reduced;

because the operation is required to be completed under the minimally invasive condition, the two non-closed valve annuluses are required to be abutted together, and the two non-closed valve annuluses are changed into a flat state, so that the two non-closed valve annuluses are contracted in the first connecting pipe 12, and in the process, the position of one pair of adjacent end points of the two non-closed valve annuluses is the position of the stress concentration point.

The closed end 71 of the V-shaped buffer portion 7,V-shaped buffer portion 7 provided at the stress concentration point is provided toward the direction approaching the flap rod 232.

Therefore, the V-shaped buffer part 7 can play a role in buffering and dispersing the stress received by the stress concentration points of the two non-closed valve pressing rings, and effectively reduce the stress received by the stress concentration points of the two non-closed valve pressing rings.

By the arrangement, the two non-closed pressure valve ring bodies are not easy to break at the stress concentration point, so that the structural integrity of the two non-closed pressure valve ring bodies is ensured, and the normal use of the two non-closed pressure valve ring bodies is ensured.

The second action is: the bending is convenient;

the valve grabbing device has the advantages that the V-shaped buffer part 7 plays a role in a preset bending path, so that two non-closed valve pressing rings can be bent along the V-shaped buffer part 7 in the process of being attached together.

The third action is: after release, the device is unfolded smoothly;

because the included angle of the V-shaped buffer parts 7 is gradually reduced in the process that the two non-closed valve pressing ring bodies are close together along the V-shaped buffer parts 7, and the reset opening force between the V-shaped buffer parts 7 is gradually increased, when the two non-closed valve pressing ring bodies are released from the first connecting pipe 12, the V-shaped buffer parts 7 can be smoothly unfolded under the action of the reset opening force.

In the actual use, considering that the first connecting pipe 12 and the second connecting pipe 22 slide relatively, the non-closed valve pressing ring body is gradually exposed from the first connecting pipe 12 and can be smoothly restored to an unfolded state, the non-closed valve pressing ring body is made of nickel-titanium alloy wires, the memory property of the nickel-titanium alloy wires is utilized, the non-closed valve pressing ring body can be ensured to be smoothly restored to an initial state, and the delivery of the valve pressing ring 23 can be inserted into a heart under the minimally invasive condition, so that the intervention size of the valve pressing ring 23 is reduced, and the trauma is reduced.

Considering the overall situation of the valve pressing ring 23, the non-closed valve pressing ring body, the valve pressing rod body 232, the transition circular arc 8 and the V-shaped buffer part 7 are of an integrated structure, and the valve pressing rod body 232, the transition circular arc 8 and the V-shaped buffer part 7 are all made of nickel-titanium alloy wires, so that the valve pressing ring 23 is integrally made of nickel-titanium alloy wires.

Specifically, the sealing presser 10 is mounted on the end face of the first handle 11 facing the second handle 21, and the through-hole 4 in the first handle 11 penetrates the sealing presser 10.

In actual use, the elastic reset piece 5 adopts a spring, the opposite surfaces of the sealing pressing piece 10 and the second handle 21 are provided with annular grooves 6, one end of the elastic reset piece 5 is arranged in the annular groove 6 of the sealing pressing piece 10, and the other end of the elastic reset piece 5 is arranged in the annular groove 6 of the second handle 21.

Specifically, a stepped hole 16 is provided in the via hole 3, a gasket 15 is installed in the stepped hole 16, and one end of a second connection pipe 22 is penetrated from the gasket 15 and connected to a second handle 21 provided outside the first handle 11.

The sealing pad 15 prevents blood flowing out of the through hole 3 of the first handle 11 during operation and prevents blood leakage.

Embodiment two:

as shown in fig. 13, the second embodiment provides a leaflet repair device, which comprises a leaflet repair instrument 9 and a valve grabbing device according to the first embodiment, wherein the second embodiment is used for mitral valve edge-to-edge repair, and the anterior leaflet and the posterior leaflet are clamped by matching the support valve ring 13 and the pressing valve ring 23, and then the anterior leaflet and the posterior leaflet are accurately positioned, so that puncture is performed.

Specifically, the prosthetic component of the valve leaflet prosthetic appliance 9 sequentially passes through the through hole 4 of the second handle 21, the through hole 4 of the first handle 11, the supporting valve ring 13 and the pressing valve ring 23, respectively positions and punctures the front leaf and the rear leaf, implants artificial chordae tendineae, tightens the artificial chordae tendineae on the front leaf and the rear leaf by adopting the existing knotter, and fixes the two chordae tendineae together at the lower end of the valve leaflet, so that the mitral valve is changed into a double opening from a single opening, and the edge-to-edge prosthetic operation of the mitral valve is completed.

It should be noted that the leaflet restoration device 9 mentioned in the first embodiment and the second embodiment of the present application is a prior art, and the present application will not be described in detail. A system for leaflet repair for minimally invasive surgery is disclosed, for example, in CN108836575 a.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. The valve grabbing device is characterized by comprising a valve supporting mechanism and a valve pressing mechanism;

through holes are formed in the first handle and the second handle.

2. The valve grasping device according to claim 1, wherein an elastic restoring member is provided on the second connecting tube between the first handle and the second handle, and the elastic restoring member connects the first handle and the second handle together.

3. The valve grabbing device as claimed in claim 1, wherein the valve supporting ring comprises a valve supporting ring body and a valve supporting rod body connected with the valve supporting ring body, the valve supporting rod body is arranged at one end of the first connecting pipe far away from the first handle, and the length direction of the valve supporting rod body is consistent with the length direction of the first connecting pipe;

4. A valve grabbing device according to claim 3, wherein a transition arc is arranged between the valve supporting half ring and the inner bending transition rod, and a transition arc is arranged between the inner bending transition rod and the valve supporting rod body.

5. The valve grabbing device according to claim 1, wherein the valve pressing ring comprises a valve pressing ring body and a valve pressing rod body connected with the valve pressing ring body, the valve pressing rod body is installed at one end, far away from the second handle, of the second connecting pipe, and the length direction of the valve pressing rod body is consistent with the length direction of the second connecting pipe.

6. The valve grasping device according to claim 5, wherein the valve pressing ring body is a non-closed valve pressing ring body, and the valve pressing rod body is correspondingly connected with two end points of the non-closed valve pressing ring body;

7. The valve grab of claim 5, wherein the valve pressing ring body comprises two non-closed valve pressing ring bodies, the two non-closed valve pressing ring bodies are oppositely arranged, and one pair of adjacent end points of the two non-closed valve pressing ring bodies are connected together;

8. A valve grab according to claim 3, wherein a sealing pressing piece is mounted on an end face of the first handle facing the second handle, and the through hole in the first handle penetrates through the sealing pressing piece.

9. The valve grabbing device according to claim 1, wherein a stepped hole is formed in the through hole, a sealing gasket is installed in the stepped hole, and one end of the second connecting pipe penetrates through the sealing gasket and is connected with the second handle arranged on the outer side of the first handle.

10. A leaflet repair device comprising a leaflet repair instrument and the valve grabber of any one of claims 1-9;