CN112402061B - Braided mesh valve repair clamp - Google Patents

Abstract

The invention relates to the technical field of medical instruments, in particular to a braided mesh valve repair clamp which comprises a braided mesh clamp, a valve clamp, a top seat and a base; the woven net clip is of a woven net structure and has elasticity, and comprises a top columnar abutting column and two clamping strips which extend symmetrically to abut against the bottom of the column; the inside of the abutting column is wrapped with filler, and the top of the abutting column is connected with the top seat; the front section of the clamping strip is bent upwards from the extending part of the abutting column and forms a woven net clamping surface with the abutting column, and the rear section of the clamping strip is bent reversely and is connected to the base in an extending way; the valve clip is fixed in the clamping surface of the woven mesh clip. The braided mesh valve repair clamp reduces the whole weight of the clamp by integrally braiding the braided mesh clamp, so that the clamp is not easy to damage and lose the functionality, the preparation process is simple, the clamp has more excellent tensile and fatigue resistance, the functional life of the valve is prolonged, the long-term health of a patient is benefited, and the success rate of an operation and the convenience of the operation are improved.

Description

Braided mesh valve repair clamp

Technical Field

The invention relates to the technical field of medical instruments, in particular to a braided mesh valve repair clamp.

Background

Regurgitation is a common valvular disease. Regurgitation is caused by the failure of the leaflets to close completely, causing blood to flow back into the chamber where the blood is pumped, and is caused by the main reasons for regurgitation, such as annular dilation, leaflet prolapse, and obstruction of leaflet movement, and is impaired by the lesions of the valve caused by many diseases, such as rheumatic heart disease and endocarditis.

The main current methods for leaflet treatment are valve replacement techniques and valve repair techniques. Leaflet replacement techniques replace an original diseased or abnormal heart valve with a prosthetic valve. Such replacement surgery often requires an open chest procedure, which is a major trauma to the patient. The valve repair treatment is to send the clip from the apex of the heart to the damaged valve by a conveyer and clamp the front leaflet edges of the valve leaflets together by the clip. Patent document of prior art such as application No. CN202010255551 discloses a heart valve repair clamp, comprising an inner clamp, an outer clamp, and a clamping plate, wherein the inner clamp and the outer clamp can extend from a folded closed position to an opened state of the inner clamp and the outer clamp, the clamping plate comprises a fixed arm and a movable arm, and the fixed arm is fixed on the inner clamp and moves together with the inner clamp; the outer clamp comprises a base and an outer clamp weaving arm on the base; the movable arm is also connected with a first control wire to control the movable arm to be clamped with the inner clamp outer plate. However, the above technical scheme adopts a local weaving + alloy structure, so that the fatigue strength is not enough, the risk of fatigue fracture occurs after the human body works for a long time, the structure is complex, and the manufacturing cost is high.

In view of the above technical problems, it is desirable to improve.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a braided mesh valve repair clamp.

In order to achieve the purpose, the invention adopts the following technical scheme:

a braided mesh valve repair clamp comprises a braided mesh clamp, a valve clamp, a top seat and a base; the woven net clip is of a woven net structure and has elasticity, and comprises a top columnar abutting column and two clamping strips which extend symmetrically to abut against the bottom of the column; the supporting column is internally wrapped with filler, and the top of the supporting column is connected with the top seat; the front section of the clamping strip is bent upwards from the extending part of the abutting column and forms a woven net clamping surface with the abutting column, and the rear section of the clamping strip is bent reversely and is connected to the base in an extending way; the top seat and the base are used for being connected with a conveying device, the conveying device drives the base and the top seat to move relatively, and the base and the top seat drive the weaving net clamp to clamp when moving relatively; the valve clip is fixed in the clamping surface of the woven mesh clip, the valve clip is connected with a control wire, and the valve clip is used for capturing a clamped valve.

Preferably, the braided mesh valve repair clamp further comprises an auxiliary clamping support, and the auxiliary clamping support is fixed with the base and acts on the clamping strips to increase the clamping force of the clamping surface of the braided mesh.

Preferably, the auxiliary clamping support is a clamping frame with two petal-shaped clamping frames, the bottom of the clamping frame is fixed with the base, and the tops of the frame edges of the two petal-shaped clamping frames are fixedly supported and connected with the reverse bending part of the rear section of the clamping strip in any one of a welding mode, a weaving mode and a rotating mode.

Preferably, the material of the clamping frame is any one of nickel-titanium alloy wires, stainless steel wires, carbon fibers, glass fibers and high polymer materials.

Preferably, the woven net clip is formed by one or more of single-layer weaving, multi-layer weaving or laser cutting.

Preferably, the woven mesh clip and the valve clip are provided with covering films on the surfaces, the covering films are used for carrying functional drugs, the covering films are single-layer covering films or multi-layer covering films, and the covering films are made of any one or a combination of multiple of non-degradable high polymer materials, degradable high polymer materials and natural polymers.

Preferably, the maximum angle of opening of the two sides of the clamping surface of the woven net is 160 degrees.

Preferably, the valve clip is of a double-layer titanium sheet sawtooth structure and comprises a needle inserting type fixing piece and a sawtooth-shaped clamping piece, the fixing piece is connected with the clamping strip in any one fixing mode of welding and weaving, and the clamping piece is connected with the control wire.

Preferably, the tail end of the guide wire of the wire control adopts a circular ring shape, and the valve clip retains the local wire control after capturing and clamping the valve.

Preferably, the filler is fixed inside the abutting column, and the filler is selected from any one or a combination of more of a non-degradable high polymer material, a degradable high polymer material and a natural polymer.

Compared with the prior art, the braided mesh valve repair clamp disclosed by the invention has the advantages that the overall weight of the clamp is reduced by integrally braiding the braided mesh clamp, the clamp is not easy to damage and lose the functionality, the preparation process is simple, the better tensile and anti-fatigue capabilities are realized, the functional life of the valve is prolonged, the long-term health of a patient is benefited, and the success rate of an operation and the convenience of the operation are improved.

Drawings

Fig. 1 is a schematic overall structure diagram of a braided mesh valve repair clamp according to a first embodiment of the invention;

FIG. 2 is a schematic top view of a woven mesh valve repair clip according to a first embodiment of the invention;

FIG. 3 is a schematic view of a deployed configuration of a woven mesh clip of the woven mesh valve repair clip according to a first embodiment of the present invention;

FIG. 4 is a side view of a deployed configuration of a woven mesh clip of the woven mesh valve repair clip according to a first embodiment of the present disclosure;

FIG. 5 is a schematic view of a valve clip of the woven mesh valve repair clip of the first embodiment of the present invention;

FIG. 6 is a schematic view of a woven mesh valve repair clip with the valve clip and the woven mesh clip secured in accordance with a first embodiment of the present invention;

FIG. 7 is a schematic view of a frame of a braided mesh valve repair clip according to a first embodiment of the present invention;

FIG. 8 is a schematic view of a woven mesh valve repair clip capturing a clasped leaflet according to a first embodiment of the present invention;

FIG. 9 is a schematic view of a braided mesh valve repair clip after capturing the clasped leaflets, in accordance with a first embodiment of the present invention;

wherein: 100. weaving a mesh valve repair clamp main body; 101. a top seat; 102. a base; 103. weaving a net clamp; 104. a valve clip; 105. a clamping frame; 106. a filler; 107. a leaflet; 108. a top rod; 109. and controlling the filaments.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

The first embodiment is as follows:

as shown in fig. 1-9, the braided mesh valve repair clip of the present embodiment is used in valve repair procedures and the repair is performed by delivering the clip to the left atrium with the aid of a delivery device by a "transseptal technique" (i.e., inserting a catheter into the right femoral vein, up the inferior vena cava and into the right atrium; then puncturing the septum and passing the catheter into the left atrium).

Specifically, the braided mesh valverepair clamp body 100 comprises a braidedmesh clamp 103, avalve clamp 104, atop seat 101, abase 102 and an auxiliary clamping support.

Thewoven net clip 103 is of a woven net structure and has elasticity, and comprises a top columnar abutting column and two clamping strips which extend symmetrically to abut against the bottom of the column; the abutting column is internally wrapped withfiller 106, and the top of the abutting column is connected with thetop seat 101; the front section of the clamping strip is bent upwards from the extending part of the abutting column and forms a clamping surface of thewoven net clamp 103 with the abutting column, the maximum opening angle of two sides of the clamping surface of thewoven net clamp 103 is set to be 160 degrees, the applicability is optimal, and the rear section of the clamping strip is bent reversely and is connected to thebase 102 in an extending way; weavenet clip 103 and adopt and weave network structure, network structure has better tensile ability and antifatigue ability, can all-round parcel filler 106 prevent to reveal simultaneously,filler 106 with lean on the post internal fixation simultaneously,filler 106 chooses for use in the arbitrary one or the multiple combination in non-degradable macromolecular material, the natural polymer. The preferredwoven mesh clip 103 may be formed by laser cutting and similar processes that may be formed into a mesh structure; further, thewoven mesh clip 103 may be adapted to different scene needs using one or more combinations of single-layer, multi-layer weaving, or laser cutting. Thetop seat 101 and thebottom seat 102 are fixed to thewoven net clamp 103 by welding, preferably, they may be fixed by riveting, rotating shaft, or pressing.

Thetop seat 101 and thebase seat 102 are used for being connected with a conveying device, connecting bulges connected with the conveying device are arranged on two sides of thetop seat 101, a connecting through hole connected with the conveying device is formed in the center of thetop seat 101, and a connecting groove connected with the conveying device is formed in the center of thebase seat 102; thetop seat 101 has a through hole for thecontrol wire 109 to pass through, and thebottom seat 102 has a hole for thedelivery device ram 108 to pass through. The conveying device drives thebase 102 and thetop seat 101 to move relatively, and thebase 102 and thetop seat 101 drive the knittingnet clamp 103 to clamp when moving relatively.

Thebase 102 fixes the auxiliary clamping support at the same time, the embodiment selects theclamping frame 105 with two petal-shaped clamping frames, the bottom of theclamping frame 105 is fixed with thebase 102, the frame edge tops of the two petal-shaped clamping frames are fixedly supported and connected with the reverse bending part of the rear section of the clamping strip through any one of welding, weaving and rotating shafts, the clamping force of the clamping surface of theweaving net clamp 103 is increased, and meanwhile, a certain supporting effect is achieved, and the service life of the component is prolonged; the petal shape is preferably lotus petal shape, the manufacturing adopts laser cutting, and preferably a series of processes such as 3D printing, carving and the like can be adopted; the material of theclamping frame 105 is any one of nickel-titanium alloy wire, stainless steel wire, carbon fiber, glass fiber and high polymer material.

Thevalve clip 104 is fixed in the clamping surface of thewoven mesh clip 103, thevalve clip 104 is connected with acontrol wire 109, and thevalve clip 104 is used for capturing a clamped valve; thevalve clamp 104 is a double-layer titanium sheet sawtooth structure and comprises a needle inserting type fixing piece and a sawtooth-shaped clamping piece, the needle inserting type structure conveniently penetrates through thewoven mesh clamp 103 to reach the reverse side and then is connected and fixed together through welding, the preferable fixing piece and the clamping strip are directly connected in a weaving mode, and the clamping piece is connected with thecontrol wire 109; the double-layer alloy plate structure is adopted, the inner clamping sheet is provided with the sawteeth to better fix thevalve leaf 107, preferably, the single-layer or multi-layer structure can be adopted, and the sawteeth can also adopt a hollow pipe similar structure.

The surfaces of thewoven mesh clip 103 and thevalve clip 104 are provided with a film for carrying functional drugs and accelerating endothelialization of the repair clip, the film can be a single-layer film or a multi-layer film, and the material of the film can be any one or combination of multiple of non-degradable high polymer material, degradable high polymer material and natural polymer.

When the repair clamp is used, thewoven mesh clamp 103 and thevalve clamp 104 of the repair clamp are closed with theclamp frame 105 by using theejector rod 108 of the conveying device, and theejector rod 108 is preferably made of high-strength alloy materials, and can be made of nickel-titanium alloy, carbon fiber and glass fiber. The delivery device is used to assist in moving the repair clip from the right atrium through the valve and into the right ventricle. The repairing clamp is in a W-shaped opening state by the aid of theejector rod 108 and opening the clamping surface of the wovenmesh clamp 103 and theclamping frame 105, and theejector rod 108 is fixed with the base 102 through threads or buckles, so that theejector rod 108 is convenient to recover. The position of the repair clamp is moved by the delivery device and thevalve clip 104 is opened using thewire control 109, at which time there is a gap between thevalve clip 104 and the clamping strip, which gap is fixed with thevalve leaflet 107, and there is an opening angle of 25 degrees on one side, preferably adjustable by adjusting the size of theclamping frame 105 and the clamping strip. With the help of the delivery device, thewire control 109, theleaflets 107 are clamped in sequence; the lead of thewire 109 can ensure that thevalve clip 104 can be opened for multiple times to adjust the position and achieve a proper clamping state. And after the condition is confirmed to be qualified, theejector rod 108 is used for retracting, and the repairing clamp is in a closed state. Finally, theejector rod 108 and thewire control 109 can be retracted by using the conveying device, and the operation is completed.

The braided mesh valve repair clamp of the embodiment has the advantages that the overall weight of the clamp is reduced by integrally braiding the braided mesh clamp through a special structure, the clamp is not easy to damage and lose the functionality, the preparation process is simple, the braided mesh clamp can be realized through a simple processing method, the fixing method has no special requirements on the valve shape structure, the braided mesh clamp can be realized on the surfaces of valves with various complex shapes, the operation of repairing the valves can be completed only by passing through femoral veins and then passing through a heart septum, the damage to patients is small, the damaged valve leaflet tissues are successfully connected by utilizing the structure, the physiological function of the valves is recovered, the braided mesh valve repair clamp has more excellent tensile strength and fatigue resistance, the functional life of the valves is prolonged, the long-term health of the patients is benefited, the success rate of the operation and the convenience of the operation are improved, meanwhile, the surface of the clamp has good compatibility of a film and blood, and the formation of thrombus can be effectively reduced, and can effectively shorten the time required by endothelialization.

Example two:

the braided mesh valve repair clamp of the present embodiment differs from the first embodiment in that:

in the embodiment, the auxiliary clamping bracket is omitted, and the woven mesh clamping material has enough elasticity and yield strength, so that the structure is simplified, and the overall weight is reduced.

Other structures refer to the first embodiment.

Example three:

the braided mesh valve repair clamp of the present embodiment differs from the first embodiment in that:

in the embodiment, the tail end of the guide wire of the wire control adopts a circular ring shape, the valve clip retains local wire control after capturing and clamping the valve, and the wire control can be reused for the recovery of the conveying device or the replacement of the repair clamp in the later period.

Other structures refer to the first embodiment.

Example four:

the braided mesh valve repair clamp of the present embodiment differs from the first embodiment in that:

in the embodiment, the clamping piece is changed into a semicircular form, so that the contact area between the clamping piece and the valve leaf is increased, and other structures which are more firmly fixed are referred to in the first embodiment.

Example five:

the braided mesh valve repair clamp of the present embodiment differs from the first embodiment in that:

the auxiliary clamping support is not limited to a clamping frame type structure, clamping plates and clamping sheets can be selected, the supporting contact area is increased, the structural stability is enhanced, and other structural forms capable of achieving the auxiliary clamping effect, such as a woven net type support, can also be selected.

Other structures refer to the first embodiment.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (8)

1. A braided mesh valve repair clamp is characterized by comprising a braided mesh clamp, a valve clamp, a top seat and a base; the woven net clip is of a woven net structure and has elasticity, and comprises a top columnar abutting column formed by weaving and two clamping strips which extend symmetrically against the bottom of the column; the interior of the abutting column formed by weaving is wrapped with filler, the woven net clamps wrap the filler in all directions to prevent leakage, and the top of the abutting column is connected with the top seat; the front sections of the clamping strips are bent upwards from the abutting columns to extend, a clamping surface of the woven mesh clamp is formed between the front sections and the abutting columns, the rear sections of the clamping strips are bent reversely and extend to be connected to the base, and the abutting columns and the two clamping strips are integrally woven; the top seat and the base are used for being connected with a conveying device, the conveying device drives the base and the top seat to move relatively, and the base and the top seat drive the clamping of the weaving net clamp when moving relatively; the valve clip is fixed in the clamping surface of the woven mesh clip and is used for capturing a clamped valve;

the valve clip is of a double-layer titanium sheet sawtooth structure and comprises a needle inserting type fixing piece and a sawtooth-shaped clamping piece, and the needle inserting type structure conveniently penetrates through the weaving net clip to reach the reverse side and is connected with the weaving net clip to be fixed together through welding;

the fixing piece is connected with the clamping strip in any one fixing mode of welding and weaving, and the clamping piece is connected with the control wire;

the tail end of the guide wire of the wire control adopts a circular ring shape, and the valve clip retains local wire control after capturing and clamping the valve.

2. The woven mesh valve repair clamp of claim 1, further comprising an auxiliary clamping bracket secured to the base and acting on the clamping strip for increasing the clamping force of the clamping surface of the woven mesh clamp.

3. The braided mesh valve repair clamp of claim 2, wherein the auxiliary clamping frame is a clamping frame with a two-petal-shaped clamping frame, the bottom of the clamping frame is fixed with the base, and the top of the frame edge of the two-petal-shaped clamping frame is fixedly supported and connected with the reverse bending part of the rear section of the clamping strip through any one of welding, weaving and rotating shafts.

4. The braided mesh valve repair clamp of claim 3, wherein the clamping frame is made of any one of nitinol wires, stainless steel wires, carbon fibers, glass fibers and polymer materials.

5. The woven mesh valve repair clamp of any one of claims 1-4, wherein the woven mesh clamp is formed by one or more of a single-layer weave and a multi-layer weave.

6. The clamp for repairing braided mesh valve as claimed in claim 5, wherein the surface of the braided mesh clip and the valve clip is provided with a covering film, the covering film is used for carrying functional drugs, and the material of the covering film is selected from any one or a combination of more of non-degradable high molecular material, degradable high molecular material and natural polymer; the coating is a single-layer coating or a multi-layer coating.

7. The woven mesh valve repair clip of claim 6, wherein the maximum angle of opening of the woven mesh clip on both sides of the clamping face is 160 degrees.

8. The woven mesh valve repair clamp of claim 7, wherein the filler is fixed inside the abutting column, and the filler is selected from one or more of a non-degradable polymer material, a degradable polymer material and a natural polymer.

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