CN216603191U

CN216603191U - Contracting device of valve ring contraction body

Info

Publication number: CN216603191U
Application number: CN202121071299.1U
Authority: CN
Inventors: 李建文; 李峰; 杨亮
Original assignee: Shanghai Yuban Medical Technology Co ltd
Current assignee: Shanghai Yuban Medical Technology Co ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2022-05-27
Anticipated expiration: 2031-05-18

Abstract

The utility model belongs to the technical field of interventional medical instruments, and particularly relates to a contraction device of a valve annulus contraction body. The utility model provides a contraction device of a valve annulus contraction body, which comprises: implanting a ring body: the implantation ring body is of a hollow flexible cylindrical structure; contracting the spring: the outer side of the annular structure of the contraction spring is fixedly connected with the inner wall of the hollow structure of the implantation ring body; contracting the pull rope: the far end of the contraction pull rope is fixedly connected with the far end of the contraction spring, and the contraction pull rope penetrates through the contraction spring. For interventional surgical heart valve contraction; by arranging the spring structure, the contraction device is simplified, and the weight of the device is reduced; greatly reduces the burden of the beating of the heart of the patient.

Description

Contracting device of valve ring contraction body

Technical Field

The utility model belongs to the technical field of interventional medical instruments, and particularly relates to a contraction device of a valve annulus contraction body.

Background

The minimally invasive interventional medical technology is an efficient diagnosis and treatment method which is gradually developed in recent years, has the outstanding advantages of small wound, simple and convenient operation, accurate interventional part, few complications and the like, and is one of the most important diagnosis and treatment means for cardiovascular diseases and tumor diseases. In interventional medical surgery, a professional doctor usually needs to manually and mechanically operate one or more slender flexible catheters with different shapes and functions to deal with the complicated and changeable human body cavity environments of patients such as cardiovascular and the like, and then can send the catheters, guide wires, brackets and other instruments to the preset pathological change part for minimally invasive diagnosis and treatment of the pathological change part.

The incidence of mitral valve disease is high among adult heart valve disease. Mitral Regurgitation (MR) in mitral valve disease is a serious concern for patients, and normally the mitral valve in the human heart acts as a hemostatic valve to prevent the backflow of oxygen-enriched blood from the lungs into the left atrium, and MR is generated once the mitral valve is improperly closed or misaligned, which can significantly reduce the pumping efficiency of the heart and even cause heart failure. Mitral regurgitation is divided into both functional and degenerative, and Functional Mitral Regurgitation (FMR) is characterized by mitral annulus dilation, inadequate leaflet coaptation, and mitral leaflet tethering, which are caused by left ventricular dysfunction and remodeling. In the context of FMR, the poor results and ambiguous benefits of surgical mitral valvuloplasty have encouraged the search for alternative, innovative catheter and minimally invasive solutions, such as percutaneous rim-to-rim repair, indirect annuloplasty, direct annuloplasty, and transcatheter mitral valve replacement. Mitral annuloplasty (MVA) or valve replacement is the most common surgical procedure for treating FMR. The Cardioband system (Edwards Lifescience, Irvine, USA) is a percutaneously adjustable surgical direct annuloplasty device. Since it is implanted on the beating heart through a transseptal transvenous approach, it can reduce the size of the mitral valve space in real time and improve leaflet coaptation on the beating heart. Up to now, more than 400 FMR patients have been implanted with Cardioband. The Cardioband Delivery System (CDS) is a suture-free tape for annuloplasty, which strictly replicates surgical annuloplasty, consisting of three parts, (1) an implant delivery system for continuous navigation across the annulus; (2) the anchoring driver is used for one-to-one torque transmission and implantation of the anchor; (3) sizing tools and adjustment mechanisms within the implant provide uniform, gradual tightening. Cardioband uses a delivery sheath to deliver a plurality of anchoring screws and accurately screw into a specific position, so as to fix the polymer annuloplasty ring around the valve, and after all the screws are screwed in, the annuloplasty ring is contracted by pulling a wire, thereby achieving the effect of contracting the valve.

However, the currently applied ring-contracting device has a very complex structure, the weight of the device which needs to be retained in the body is large, the burden of the heartbeat of a patient is not favorably reduced, meanwhile, the current stay wire contracting mode lacks a simple and effective self-locking structure, and along with the continuous heartbeat, the contracting effect can be gradually weakened or even disappear in the uninterrupted vibration process, so that the treatment effect cannot be kept for a long time.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention provides a contracting device of a valve annulus, comprising:

implanting a ring body: the implantation ring body is of a hollow flexible cylindrical structure;

contracting the spring: the outer side of the annular structure of the contraction spring is fixedly connected with the inner wall of the hollow structure of the implantation ring body;

contracting the pull rope: the far end of the contraction pull rope is fixedly connected with the far end of the contraction spring, and the contraction pull rope penetrates through the contraction spring.

As a preferable technical solution, the retraction spring is provided with a limit hole, and the retraction cord passes through the limit hole and extends from the distal end to the proximal end of the retraction spring.

As a preferable technical solution, the retraction spring is provided with a plurality of the limit holes on the same cross section, and the independent retraction cords are respectively provided in the plurality of limit holes on the same cross section.

As a preferred technical scheme, each contraction pull rope is fixedly provided with a plurality of stop blocks, each stop block is a revolving body with the cross-sectional area uniformly changed, and the cross-sectional area of each stop block is uniformly increased from the near end to the far end; the maximum cross-sectional area of the stop block is smaller than the area of the limiting hole.

As a preferable technical scheme, an adjusting buckle is arranged on the contraction pull rope, the adjusting buckle is of a hollow middle structure, and the contraction pull rope penetrates through the hollow middle structure of the adjusting buckle to be movably connected with the adjusting buckle; the aperture of the hollow structure in the middle of the adjusting buckle is variable, and the maximum section diameter of the stop block is positioned between the maximum aperture and the minimum aperture of the hollow structure in the middle of the adjusting buckle.

As a preferred technical solution, the adjusting buckle comprises a frame, a compression spring and a sliding block; the sliding block is in a split type design and comprises a plurality of mutually independent parts, the outer ring side of the sliding block is fixedly connected with the frame through the compression spring, and a clearance hole is formed in the inner side of the sliding block.

As a preferable technical scheme, the telescopic pull rope further comprises a plurality of pushing rods, the pushing rods are hollow rod bodies, the pushing rods are arranged on the telescopic pull rope in a sliding mode, the hollow aperture of each pushing rod is larger than the maximum cross section diameter of the stop block, and the hollow aperture of each pushing rod is smaller than the outer diameter of the adjusting buckle.

As a preferable technical solution, the retractable spring further comprises a compression rod, the diameter of the compression rod is smaller than the circle diameter of the retractable spring, and the compression rod is used for abutting against the retractable spring.

As a preferable technical solution, an electrolytic release point is provided on the retraction cord, and the electrolytic release point is provided at a proximal end of the stopper.

As a preferred technical solution, an anchor is provided in the implantation ring body.

Has the advantages that:

(1) the utility model provides a contraction device of a valve ring contraction body, which is used for the contraction of an interventional operation heart valve; by arranging the spring structure, the contraction device is simplified, and the weight of the device is reduced; greatly reduces the burden of the beating of the heart of the patient.

(2) Through the cooperation of spacing hole, dog, regulation knot, provided a simple and reliable auto-lock mechanism, can realize at any time auto-lock when the shrink spring compresses to arbitrary position to allow this device to use in different patients' treatment process, can all provide feasible treatment means to the heart valve of different size, different shapes, different shrink degree demands, enlarge the application scope of this device.

(3) Through set up the electrolysis trip point on the shrink stay cord to allow external disconnection shrink stay cord, thereby allow in operation process external through pulling shrink stay cord make shrink spring drive shrink heart valve, can break off the shrink stay cord in vitro simultaneously after the operation is accomplished, will exert the part of shrink and locking function and stay in vivo, retrieve the part that does not exert key effect, reduce the part quality of staying in vivo.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a contraction device of a valve annulus provided by the present invention;

FIG. 2 is a schematic view of the adjusting buckle;

FIG. 3 is an enlarged schematic view at A in FIG. 1;

1-implantation ring body, 2-contraction spring, 21-limit hole, 3-contraction pull rope, 31-stop block, 32-electrolysis release point, 4-adjusting buckle, 41-frame, 42-compression spring, 43-slide block, 44-clearance hole, 5-push rod, 6-compression rod and 7-anchor.

Detailed Description

The utility model will be further understood by reference to the following detailed description of preferred embodiments of the utility model and the examples included therein.

When describing embodiments of the present application, the use of "preferred," "preferably," "more preferred," and the like, is meant to refer to embodiments of the utility model that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. In addition, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the utility model.

In this document, relational terms such as first, second, and the like may be used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a component, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such component, apparatus, or device.

When a component, element, or layer is referred to as being "on," "bonded to," "connected to," or "coupled to" another element or layer, it may be directly on, bonded to, connected to, or coupled to the other element, or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly coupled to," "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between … …" versus "directly between … …," "adjacent" versus "directly adjacent," etc.).

As used herein, "proximal" refers to the end of the medical device that is closer to the clinician using the medical device; "distal" refers to the end of the medical device that is distal from the physician when using the medical device; the term conforms to the custom made in the medical device industry.

A contraction device for a valve annulus as shown in fig. 1 to 3, comprising:

implantation ring body 1: the implantation ring body 1 is of a hollow flexible cylindrical structure;

contracting the spring 2: the outer side of the annular structure of the contraction spring 2 is fixedly connected with the inner wall of the hollow structure of the implantation ring body 1;

the contraction pull rope 3: the far end of the contraction pull rope 3 is fixedly connected with the far end of the contraction spring 2, and the contraction pull rope 3 penetrates through the contraction spring 2.

Preferably, the implantation ring body 1 is a polymer ring.

The retraction spring 2 is provided with a limiting hole 21, and the retraction pull rope 3 passes through the limiting hole 21 and extends from the far end to the near end of the retraction spring 2.

Specifically, the limiting hole 21 penetrates through all cross sections of the retraction spring 2, and the retraction wire penetrates through the limiting hole 21 from a most distal fixing point and extends proximally.

The retraction spring 2 is provided with a plurality of the limiting holes 21 on the same cross section, and the independent retraction pull ropes 3 are respectively arranged in the plurality of the limiting holes 21 on the same cross section.

Each contraction pull rope 3 is fixedly provided with a plurality of stoppers 31, each stopper 31 is a revolving body with the cross section area uniformly changed, and the cross section area of each stopper 31 is uniformly increased from the near end to the far end; the maximum cross-sectional area of the stopper 31 is smaller than the area of the stopper hole 21.

The stopper 31 freely passes through the stopper hole 21.

An adjusting buckle 4 is arranged on the contraction pull rope 3, the adjusting buckle 4 is of a hollow middle structure, and the contraction pull rope 3 penetrates through the hollow middle structure of the adjusting buckle 4 to be movably connected with the adjusting buckle 4; the hole diameter of the hollow structure in the middle of the adjusting buckle 4 is variable, and the maximum section diameter of the stop block 31 is positioned between the maximum hole diameter and the minimum hole diameter of the hollow structure in the middle of the adjusting buckle 4.

Specifically, the stopper 31 can pass through the adjusting buckle 4 in the direction from the distal end to the proximal end, and conversely, the stopper 31 cannot pass through the adjusting buckle 4 in the direction from the proximal end to the distal end, and the adjusting buckle 4 cannot pass through the limiting hole 21, so that the contraction spring 2 is locked in the compressed state.

The adjusting buckle 4 comprises a frame 41, a compression spring 42 and a sliding block 43; the sliding block 43 is designed in a split manner and comprises a plurality of mutually independent parts, the outer ring side of the sliding block 43 is fixedly connected with the frame 41 through the compression spring 42, and the inner side of the sliding block 43 is provided with a clearance hole 44.

Preferably, the sliding blocks 43 are arranged in a plurality of mutually independent fan-shaped structures;

when the mutually independent structures in the sliding block 43 approach to the center direction under the pressure of the compression spring 42 and contact with each other, the clearance hole 44 is in a minimum diameter state; when the clearance hole 44 is in a minimum diameter state, the stop block 31 is prevented from passing through the adjusting buckle 4 in a direction from the proximal end to the distal end;

when the stopper 31 passes through the adjustment buckle 4 in the distal-to-proximal direction, the mutually independent structures of the slider 43 move in the circumferential direction and are separated from each other, thereby allowing the stopper 31 to pass through the adjustment buckle 4 in the distal-to-proximal direction.

The retractable pull rope is characterized by further comprising a plurality of pushing rods 5, wherein the pushing rods 5 are hollow rod bodies, the pushing rods 5 are arranged on the retractable pull rope 3 in a sliding mode, the hollow aperture of each pushing rod 5 is larger than the maximum cross-section diameter of the stop block 31, and the hollow aperture of each pushing rod 5 is smaller than the outer diameter of the adjusting buckle 4.

The pushing rod 5 is used for pushing the adjusting buckle 4, and provides a function of preventing the adjusting buckle 4 from moving when the stop block 31 passes through the adjusting buckle 4.

And the compression rod 6 is smaller than the circle diameter of the contraction spring 2 in diameter and is used for abutting against the contraction spring 2. Preventing the retraction spring 2 from unwinding when the retraction cord 3 is pulled.

An electrolytic release point 32 is arranged on the retraction cord 3, and the electrolytic release point 32 is arranged at the proximal end of the stopper 31. When the contraction pull rope 3 is electrified from the outside of the body, the electrolysis point 32 is disconnected, so that components without key action can be conveniently recycled, the number of components left in the body is reduced, and the burden of the human body is reduced.

An anchor 7 is arranged in the implantation ring body 1; the anchoring bolts 7 serve to fix the implant ring 1 to body tissue, in particular a heart valve.

The working principle is as follows:

the utility model relates to a retractor for implanted ring retraction, comprising a braided implanted ring body, a compressible retraction spring fixed with the ring body, a retraction pull rope penetrating through the retraction spring, an anchor, an adjusting buckle, a compression rod and a push rod. Wherein the contraction pull rope comprises a plurality of contraction pull ropes which are uniformly distributed in the circumferential direction of the spring. The far end of the contraction spring is fixed with the far end of the contraction pull wire, a plurality of conical stop blocks are attached to the near end of the contraction pull wire, and the diameter of the conical bottom surfaces of the stop blocks is slightly smaller than that of the through holes in the spring. An electrolysis disengaging point is arranged at the stop block at the most proximal end of the contraction pulling rope and is used for fusing the contraction pulling rope after external electrification, and the residual part at the proximal end can be pulled out of the body after the operation is finished. The stopper is used in combination with the contraction pull rope, the push rod, the compression rod and the adjusting buckle to complete the compression of the spring and realize the annular contraction of the implantation ring. The adjusting buckle comprises a frame, a sliding block and a compression spring, when the adjusting buckle penetrates from the near end of the contraction pull rope and passes through the conical stop block, after the compression spring is compressed, a clearance hole in the middle of the adjusting buckle is enlarged, the sliding block slides towards the outer side direction of the frame along with the inclined plane of the stop block until the sliding block passes through the stop block, the compression spring returns to the original length, the clearance hole returns to the minimum, and therefore the adjusting buckle is assembled to the far end of the stop block. The whole conveying process is as follows: with the aid of a delivery catheter, the implantation ring body reaches a designated position of the heart valve, is applied to the fibrous tissue of the annulus, and a plurality of spiral pins are uniformly screwed into the fibrous tissue by an anchoring delivery system. After all the anchors are in place, the near ends of the contraction pull ropes are pulled, the compression rods extrude the contraction springs along the inner cavity of the catheter, the stop blocks are exposed along with the shortening of the length of the contraction springs, and then the adjusting buckles and the pushing rods are sent into the body along the contraction pull ropes and pass through the exposed stop blocks one by one until the valve ring is reduced to a proper length. Finally, the contraction pull rope is electrified, the wire can be fused at the electrolytic dislocation point and the traction wire is separated, and the forming ring is left in the body.

Claims

1. A contraction device of a valve annulus, comprising: implant ring (1): the implantation ring body (1) is of a hollow flexible cylindrical structure;

retraction spring (2): the outer side of the annular structure of the contraction spring (2) is fixedly connected with the inner wall of the hollow structure of the implantation ring body (1);

retraction cord (3): the far end of the contraction pull rope (3) is fixedly connected with the far end of the contraction spring (2), and the contraction pull rope (3) penetrates through the contraction spring (2).

2. The valve annulus retraction device according to claim 1, wherein the retraction spring (2) is provided with a stop hole (21), and the retraction cord (3) extends through the stop hole (21) from the distal end to the proximal end of the retraction spring (2).

3. The valve annulus retraction device according to claim 2, wherein the retraction spring (2) is provided with a plurality of said position-limiting holes (21) in the same cross-section, and wherein the plurality of position-limiting holes (21) in the same cross-section are provided with the independent retraction cords (3), respectively.

4. The contracting device of the valve annulus according to claim 3, wherein a plurality of stoppers (31) are fixedly arranged on each contracting draw rope (3), the stoppers (31) are revolved bodies with uniformly-changed cross-sectional areas, and the cross-sectional areas of the stoppers (31) are uniformly increased from the proximal end to the distal end; the maximum cross-sectional area of the stop block (31) is smaller than the area of the limiting hole (21).

5. The contracting device of the valve annulus according to claim 4, wherein an adjusting buckle (4) is arranged on the contracting pull rope (3), the adjusting buckle (4) is a hollow structure in the middle, and the contracting pull rope (3) passes through the hollow structure in the middle of the adjusting buckle (4) to be movably connected with the adjusting buckle (4); the aperture of the middle hollow structure of the adjusting buckle (4) is variable, and the maximum section diameter of the stop block (31) is positioned between the maximum aperture and the minimum aperture of the middle hollow structure of the adjusting buckle (4).

6. The device for the contraction of a valve annulus according to claim 5, characterized in that the adjustment clasp (4) comprises a frame (41), a compression spring (42), a slider (43); the sliding block (43) is in a split type design and comprises a plurality of mutually independent parts, the outer ring side of the sliding block (43) is fixedly connected with the frame (41) through the compression spring (42), and the inner side of the sliding block (43) is provided with a clearance hole (44).

7. The contracting device of the valve ring retractor according to claim 6, further comprising a plurality of pushing rods (5), wherein the pushing rods (5) are hollow rods, the pushing rods (5) are slidably disposed on the contracting pull rope (3), the hollow aperture of the pushing rods (5) is larger than the maximum cross-sectional diameter of the stopper (31), and the hollow aperture of the pushing rods (5) is smaller than the outer diameter of the adjusting buckle (4).

8. The device for the contraction of a valve annulus according to claim 1 or 2, further comprising a compression rod (6), the diameter of the compression rod (6) being smaller than the diameter of the contraction spring (2) for abutting against the contraction spring (2).

9. The contraction device for a valve annulus according to any one of claims 4 to 6, wherein an electrolysis release point (32) is provided on the contraction stay (3), and the electrolysis release point (32) is provided at a proximal end of the stopper (31).

10. The contraction device of a valve annulus according to claim 1, wherein an anchor (7) is provided in the implant annulus (1).