CN111700714A

CN111700714A - Valve clip

Info

Publication number: CN111700714A
Application number: CN202010613061.0A
Authority: CN
Inventors: 陆林祥; 曹浩
Original assignee: Shanghai East Hospital Tongji University Affiliated East Hospital
Current assignee: Shanghai East Hospital Tongji University Affiliated East Hospital
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-09-25
Anticipated expiration: 2040-06-30
Also published as: CN111700714B

Abstract

The invention relates to a valve clip, which comprises a first valve clip and a second valve clip; the first valve clip is formed by weaving titanium-nickel alloy wires; the first valve clip comprises a first clip body with an annular opening structure; the bottom of the inner side of the first clamp body is connected with a steel cable structure; the second valve clip is made of stainless steel; the second valve clamp comprises a second clamp body, a fixed support, a fixed ring and a stiffening pipe; the fixing ring is in a circular structure and is fixedly connected with the bottom of the second clamp body; the two fixed supports are arranged, the front ends of the two fixed supports are respectively fixedly connected with the tail ends of the second clamp body, and the tail ends of the two fixed supports are fixedly connected with the central position of the bottom of the fixed ring; the stiffening pipe is arranged in the bottom of the second clamp body and between the two fixing supports. Its advantages are: can be used for interventional therapy of patients with heart valvular diseases such as mitral valve, tricuspid valve and aortic insufficiency, and has the advantages of simple operation, small wound, quick recovery and wide adaptation diseases.

Description

Valve clip

Technical Field

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

Background

Valvular heart disease is the abnormality of heart valves (mitral valve, tricuspid valve, aortic valve, and pulmonary valve) and their accessory structures due to inflammation, ischemic necrosis, degenerative changes, myxoid degeneration, congenital developmental malformation, rheumatic diseases, and trauma. The most commonly involved valve is the mitral valve and then the aortic valve, causing stenosis or regurgitation of a single or multiple valves, which is one of the major causes of heart failure, arrhythmias, syncope and sudden death.

Valvular heart disease remains the leading cause of disability and mortality worldwide, with approximately 10 million open chest valve repairs and replacements accounting for 20% of cardiac surgery annually in the united states. At the same time, a large part of patients take medicine conservative treatment. With increasing age, the prevalence of valvular disease increases, and it is expected that there will be a large number of patients with valvular disease.

Surgical treatment is currently considered the primary means of treating valvular heart disease, enabling valve repair or replacement, thereby ameliorating the patient's symptoms. However, the surgical operation has the defects of large trauma, slow recovery, high risk and the like, and some patients with advanced age, chest-opening history, poor cardiac function or combined multi-organ dysfunction are not suitable for the surgical treatment mode.

Chinese patent documents: cn201810476710.x, application date 2018.05.17, patent name: a valve clamping device and a valve clamping system. A valve clamping device and a valve clamping system are disclosed, wherein the valve clamping system comprises a valve clamping device and a pushing device. The valve clamping device comprises a push rod, at least two clamps, at least one extension arm and a driving component for driving the clamps to open and close and the extension arms to stretch. Each clamp comprises a first clamp arm and a second clamp arm which can be opened and closed relatively, and at least one extension arm is arranged on the surface of the first clamp arm in a telescopic mode.

Chinese patent documents: CN201820841963.8, application date 2018.06.01, patent names: a valve clamping device. A valve clamping device for treating valvular heart disease is disclosed. The valve clamping device comprises: a leaflet hook for picking up and securing a valve leaflet; a clamping component which clamps the object therein by the mutual acting force generated by closing and squeezing; the locking device is arranged outside the clamping part and can ensure that the clamping part is clamped more tightly without displacement; and the conveying device conveys each component to a surgical position in a minimally invasive intervention mode. The valve clamping device is applied to the pathological valve leaflet, and the normal chordae tendineae at two sides of the pathological part are mutually close by closing the free edge of the pathological valve leaflet, so that the valve leaflet is restored to the normal closing level.

In the valve clamping device and the valve clamping system in the patent document cn201810476710.x, the surface of the first clamp arm of the valve clamping device is provided with the telescopic extension arm, so that when the first clamp arm is opened relative to the second clamp arm of the valve clamping device, the extension arm extends out of the first clamp arm, which is equivalent to increasing the length of the first clamp arm of the clamp, the longer first clamp arm can play a better supporting effect on the valve leaflet when capturing the valve leaflet, and the valve leaflet is prevented from slipping off the surface of the first clamp arm, so that the movable valve leaflet can be rapidly captured, the operation difficulty is reduced, and the operation efficiency is improved; however, in the patent document CN201820841963.8, by providing the leaflet hooks, the clamping component and the locking device disposed outside the clamping component, the clamping component can be clamped more tightly without displacement, and the device has the advantages of simple structure, minimally invasive implantation, easy operation, detachable or adjustable clamping position, good clamping effect, and the like, and can be applied to treatment of mitral regurgitation and tricuspid regurgitation, and also can be used for other minimally invasive surgeries requiring clamping of several lamellar tissues. However, there is no report on a valve clip which can be used for interventional therapy of patients with heart valvular diseases such as mitral valve, tricuspid valve and aortic insufficiency, is simple to operate, has small trauma and quick recovery, and has wide indications.

In summary, there is a need for a valve clip that can be used for interventional therapy of patients with mitral valve disease, tricuspid valve disease and aortic insufficiency, and has the advantages of simple operation, less trauma, fast recovery and wide indications.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a valve clamp which can carry out interventional therapy on patients with heart valvular diseases such as mitral valve, tricuspid valve and aortic insufficiency, is simple to operate, has small wound, is quick to recover and has wide adaptation diseases.

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

a valve clip, comprising a first valve clip and a second valve clip; the first valve clip comprises a first clip body with an annular opening structure; the bottom of the inner side of the first clamp body is connected with a steel cable structure; the second valve clamp comprises a second clamp body, a fixed support, a fixed ring and a stiffening pipe; the fixing ring is in a circular structure and is fixedly connected with the bottom of the second clamp body; the two fixed supports are arranged, the front ends of the two fixed supports are respectively fixedly connected with the tail ends of the second clamp body, and the tail ends of the two fixed supports are fixedly connected with the central position of the bottom of the fixed ring; the stiffening pipe is arranged in the bottom of the second clamp body and between the two fixing supports.

As a preferred technical solution, the overall structure of the first valve clip is 2.0cm long; the distance between the first clamp body opening structures is 0.3 cm; the diameter of the steel cable structure is 3mm, and the length of the steel cable structure is 1 cm.

As a preferable technical scheme, the total length of the second valve clip is 2.0cm, the length of the second clip body is 1.3cm, the length of the fixing support is 1cm, and the diameter of the fixing ring is 1 cm; the length of the connecting rod is 1 cm.

As a preferable technical scheme, the cross section of the front end of the second clamp body is of an arch structure.

As a preferable technical scheme, the first valve clip is formed by weaving titanium-nickel alloy wires.

As a preferable technical solution, the second valve clip is made of stainless steel.

The invention has the advantages that:

1. adopt first valve to press from both sides the design that forms for titanium nickel alloy silk is woven, the scalable deformation of material is convenient for reach the heart chamber and accomplish the release and the fixed valve of centre gripping through current transport sheath pipe.

2. The steel cable structure arranged at the inner side of the bottom of the first valve clamp in a connected mode can be used for supporting the conveying stability of the first valve clamp.

3. Second valve presss from both sides because stainless steel's mutual contractile action under the unused state, and the second clamp is the closed condition, and the second valve clamp of being convenient for is current in current transport sheath pipe, treats to be close to first valve and presss from both sides the back and extrudees the fixed bolster through the stiffening pipe to strut the second clamp, thereby carry out the centre gripping of valve and fix, design benefit uses convenient operation.

4. The cross section of the front end of the second clamp body is in an arch structure, so that the valve is clamped and fixed without being damaged around the valve.

5. The valve clamp can be used for interventional therapy of patients with heart valvular diseases such as mitral valve, tricuspid valve and aortic insufficiency, and has the advantages of small wound, quick recovery and wide adaptation compared with the existing surgical treatment mode.

Drawings

FIG. 1 is a schematic view of a first valve clip of the present invention.

Fig. 2 is a schematic view of a second valve clip of the present invention.

Fig. 3 is a cross-sectional structure of a second body of a second valve clip according to the present invention.

Detailed Description

The invention is further described with reference to the following examples and with reference to the accompanying drawings.

The reference numerals and components referred to in the drawings are as follows:

1. first valve clamp 11. first clamp body

12. Steel cable structure 2. second valve clamp

21. Second clamp 22, fixed support

23. Fixed ring 24. stiffened pipe

Example 1

Referring to fig. 1 and 2, fig. 1 is a schematic structural view of a first valve clip of a valve clip of the present invention, and fig. 2 is a schematic structural view of a second valve clip of a valve clip of the present invention. A valve clip comprising a first valve clip 1 and a second valve clip 2; the first valve clamp 1 is formed by weaving titanium-nickel alloy wires; the first valve clip 1 comprises a first clip body 11 with an annular opening structure; the bottom of the inner side of the first clamp body 11 is connected with a steel cable structure 12; the second valve clip 2 is made of stainless steel; the second valve clip 2 comprises a second clip body 21, a fixed support 22, a fixed ring 23 and a stiffening pipe 24; the fixing ring 23 is in a circular structure and is fixedly connected with the bottom of the second clamp body 21; the number of the fixed supports 22 is two, the front ends of the fixed supports are respectively fixedly connected with the tail ends of the second clamp body 21, and the tail ends of the fixed supports are fixedly connected with the central position of the bottom of the fixed ring 23; the stiffening pipe 24 is arranged at the bottom of the second clamp body 21 and between the two fixed parts 22; the cross section of the front end of the second clamp body 21 is of an arch structure.

The valve clip of the invention is used by the following steps:

referring first to fig. 1, fig. 1 is a schematic structural view of a first valve clip 1 of the present invention; when the mitral valve, the tricuspid valve and the aortic valve are not closed completely in the treatment of the valvular heart disease, firstly, a guide wire used in the daily operation is used for entering a heart cavity where a diseased valve is located from a blood vessel and implanting an existing delivery sheath; then fixing the top of a steel cable structure 12 arranged in the first valve clamp 1 with the top of an existing conveying rod, pushing the conveying rod to enable the first valve clamp 1 to reach a heart cavity, releasing the first valve clamp 1, enabling the head ends of two first clamp bodies 11 on the first valve clamp 1 to be close to a valve to be closed under the guidance of esophagus ultrasound when the first valve clamp 1 is released for a half, and then completely clamping and fixing the valve;

referring again to fig. 2, fig. 2 is a schematic structural view of a second valve clip 2 of the present invention; after the first valve clip 1 is implanted and clamps the valve, a delivery sheath is implanted by adopting the same method as the method, the stiffening tube 24 arranged on the second valve clip 2 is connected with the bottom of the existing pushing rod by screw threads, and then the built-in stiffening tube 24 is pushed forwards, so that the two fixed supports 22 are extruded, and the head end of the second clip body 21 is gradually opened; then under the ultrasonic guidance of the esophagus, the second valve clamp 21 is abutted against the first valve clamp 11, and the second clamp body 21 at the head end of the second valve clamp 2 is aligned and abutted against the valve to be clamped; then the stiffening tube 24 is withdrawn, and the two fixing brackets 22 rebound, so that the head of the second clamp body 21 clamps and fixes on the valve; finally, the first valve clip 1 is pulled back, so that the first valve clip 1 returns to the conveying sheath and is recovered and taken out, and the second valve clip 2 is retained in the heart cavity to clamp and fix the valve;

it should be noted that: the overall structure of the first valve clip 1 is 2.0cm long; the distance between the opening structures of the first clamp body 11 is 0.3 cm; the diameter of the steel cable structure 12 is 3mm, and the length is 1 cm; the overall length of the second valve clip 2 is 2.0cm, the length of the second clip body 21 is 1.3cm, the length of the fixed support 22 is 1cm, and the diameter of the fixed ring 23 is 1 cm; the connecting rod 24 is 1cm long; the first valve clamp 1 is designed by weaving titanium-nickel alloy wires, is made of a material capable of stretching and deforming, and is convenient to reach a heart cavity through the conventional conveying sheath tube, complete release and clamp and fix a valve; the inner side of the bottom of the first valve clamp 11 is connected with a steel cable structure 12 which can be used for supporting the delivery stability of the first valve clamp 1; the second valve clamp 2 is in a closed state due to the mutual contraction effect of stainless steel materials when not in use, so that the second valve clamp 2 can conveniently pass through the existing conveying sheath, and the fixing support 22 is extruded by the stiffening tube 24 after the second valve clamp 2 approaches the first valve clamp 1, so that the second clamp 21 is spread, the valve is clamped and fixed, the design is ingenious, and the use and the operation are convenient; the cross section of the front end of the second clamp body 21 is designed to be of an arch structure, so that the valve is clamped and fixed without being damaged around the valve; the valve clamp can be used for interventional therapy of patients with heart valvular diseases such as mitral valve, tricuspid valve and aortic insufficiency, and has the advantages of small wound, quick recovery and wide adaptation compared with the existing surgical treatment mode.

According to the valve clamp, the first valve clamp is designed by weaving the titanium-nickel alloy wires, the material can be stretched and deformed, and the valve can reach the heart cavity through the conventional conveying sheath tube, and can be released and clamped to fix the valve conveniently; the steel cable structure connected with the inner side of the bottom of the first valve clamp can be used for supporting the stable delivery of the first valve clamp; the second valve clamp is in a closed state under the condition that the second valve clamp is not used due to the mutual contraction effect of stainless steel materials, the second valve clamp can conveniently pass through the existing conveying sheath, and the fixing support is extruded through the stiffening tube after the second valve clamp is close to the first valve clamp, so that the second clamp is spread, the valve is clamped and fixed, the design is ingenious, and the use and the operation are convenient; the cross section of the front end of the second clamp body is designed to be of an arch structure, so that the valve is clamped and fixed without being damaged around the valve; the valve clamp can be used for interventional therapy of patients with heart valvular diseases such as mitral valve, tricuspid valve and aortic insufficiency, and has the advantages of small wound, quick recovery and wide adaptation compared with the existing surgical treatment mode.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and additions can be made without departing from the principle of the present invention, and these should also be considered as the protection scope of the present invention.

Claims

1. A valve clip, comprising a first valve clip and a second valve clip; the first valve clip comprises a first clip body with an annular opening structure; the bottom of the inner side of the first clamp body is connected with a steel cable structure; the second valve clamp comprises a second clamp body, a fixed support, a fixed ring and a stiffening pipe; the fixing ring is in a circular structure and is fixedly connected with the bottom of the second clamp body; the two fixed supports are arranged, the front ends of the two fixed supports are respectively fixedly connected with the tail ends of the second clamp body, and the tail ends of the two fixed supports are fixedly connected with the central position of the bottom of the fixed ring; the stiffening pipe is arranged in the bottom of the second clamp body and between the two fixing supports.

2. The valve clip of claim 1, wherein the first valve clip overall structure is 2.0cm long; the distance between the first clamp body opening structures is 0.3 cm; the diameter of the steel cable structure is 3mm, and the length of the steel cable structure is 1 cm.

3. The valve clamp of claim 1, wherein the second valve clamp is 2.0cm in overall length, 1.3cm in second clamp length, 1cm in fixation stent length, and 1cm in fixation ring diameter; the length of the connecting rod is 1 cm.

4. The valve clip of claim 1, wherein the second clip body has an arcuate front end cross-section.

5. The valve clip of claim 1, wherein the first valve clip is woven from titanium-nickel alloy wire.

6. The valve clip of claim 1, wherein the second valve clip is stainless steel.