CN218247498U

CN218247498U - Locking structure of left ventricle volume reduction device

Info

Publication number: CN218247498U
Application number: CN202221596961.XU
Authority: CN
Inventors: 梁玉晨; 叶俊; 张梅慧
Original assignee: Qichen Shanghai Medical Equipment Co ltd
Current assignee: Qichen Shanghai Medical Equipment Co ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2023-01-10
Anticipated expiration: 2032-06-24

Abstract

The utility model discloses a locking structure of a left ventricle volume reduction device. The locking structure has: a wedge block which can be locked on the tie bar; a link member for decoupling said wedge from said tie rod, said link member having a distal end extending through a proximal end of said wedge. The link member has: a driving lever; a driven rod is arranged at the near end of the wedge block in a penetrating way; the near ends of the two end rods respectively penetrate through the two ends of the driving rod, and the far ends of the two end rods respectively penetrate through the two ends of the driven rod and are located on the two sides of the near end of the wedge block. The utility model discloses set up the wedge-shaped groove of a plurality of ranges on the tie rod, set up the piece of agreeing with in the locking structure of outer anchor, can through the oblique wedge angle of agreeing with the wedge-shaped groove of the square linkage segment of tie rod agrees with and connects to reach the purpose of stable closure, outer anchor can not drop from the tie rod easily. The utility model discloses a set up the unblock pincers, dissociate out the wedge piece that will lock the structure from the wedge inslot of tie rod and reach and retrieve outer anchor.

Description

Locking structure of left ventricle volume reduction device

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to left ventricle subtracts locking structure of volume device.

Background

Left Ventricular Aneurysms (LVAs) are common complications of myocardial infarction. This is because after myocardial infarction of coronary artery, ischemic necrosis of part of ventricular muscle is caused. The necrotic ventricular muscle loses its contractile function, and upon contraction of the heart, this portion of necrotic heart muscle bulges outward, forming a ventricular aneurysm, also called scar tissue. Due to the compensatory effect of the heart, the heart will continue to grow, and then heart failure, lung congestion, etc. will occur.

Left ventricular volume reduction is a ventricular reinforcement method and can be used for solving the problem of scar tissue of patients with ischemic cardiomyopathy after myocardial infarction. The left ventricular volume reduction device delivers pairs of anchors (inner and outer) into the body. They clamp the left ventricle and allow other surgical instruments to enter the heart through a small incision in the body surface. Such a minimally invasive system may also be used in conventional open chest surgery to effect ventricular repair. In the prior art, the principle of combining the inner anchor and the outer anchor is that the inner anchor and the outer anchor are connected through a tie bar, one end of the tie bar is fixed on the inner anchor, and the other end of the tie bar is locked by a locking structure of the outer anchor. The existing surgery for reconstructing the volume of the left ventricle on the market at present has the following problems, such as: (1) Because the tie bar and the locking structure are smooth planes, the anchoring force generated by long-time heart vibration after the outer anchor and the tie bar are anchored fails. (2) The external anchor and the tie rod are locked together and cannot be completely separated in the operation process, so that initial friction force exists, and force measurement is inaccurate. (3) The prior art force measuring devices have no way to simultaneously lock the outer anchors, resulting in inaccurate outer anchor locking positions.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a tie bar and locking structure for a left ventricular volume reduction device that is structurally completely different.

The utility model discloses a tie rod of left ventricle volume reduction device has a square linkage segment, the wedge-shaped groove that has a plurality of syntropy slopes on the lateral wall of square linkage segment.

Preferably, two adjacent wedge-shaped grooves are arranged closely without gaps.

Preferably, the section of the wedge-shaped groove is a right triangle:

a first right-angle side of the right-angle triangle is a planar line segment along the sidewall surface;

the second right-angle side of the right-angle triangle vertically extends from the near end of the first right-angle side as a starting point to the inside of the square connecting section as an end point;

the hypotenuse of the right triangle extends straight obliquely from the end point of the second cathetus to the distal end of the first cathetus.

Preferably, the tie bar has the square connecting section, a guide section and a needle section connected in sequence.

Preferably, the head end of the square connecting section has a twisted hole.

Preferably, the guide section and the needle section are respectively provided with a guide wire channel communicated with each other at the axial center.

Preferably, the guide section is provided with a guide hole for a guide wire to penetrate into the guide wire channel near the head end of the square connecting section.

It is another object of the present invention to provide an external anchor for a left ventricular volume reduction device, having:

a flat rectangular outer anchor body;

a locking structure fixedly disposed at a central position of one side surface of the outer anchor body, the locking structure having:

a wedge block which can be locked on the tie bar of the utility model;

a link member for decoupling said wedge from said tie rod, said link member having a distal end extending through a proximal end of said wedge.

Preferably, the link member has:

a driving lever;

a driven rod is arranged at the near end of the wedge block in a penetrating way;

the two ends of the two end rods are respectively arranged at the two ends of the driving rod in a penetrating mode, and the far ends of the two end rods are respectively arranged at the two ends of the driven rod in a penetrating mode and located at the two sides of the near end of the wedge block.

Preferably, the locking structure further has:

and the torsion spring can be used for re-locking the wedge block on the tie rod and is sleeved on the driving rod, and a first spring arm of the torsion spring is abutted against the side wall of the wedge block.

Preferably, the locking structure further has:

the wedge block, the connecting rod piece and the torsion spring are arranged in the shell; the shell is provided with a pair of waist-shaped holes on two side walls vertical to the wedge-shaped inclined plane of the wedge block, and the axial directions of the waist-shaped holes are parallel to the axial direction of the tie bar;

two ends of the driving rod are respectively arranged in a pair of waist-shaped holes of the shell in a penetrating manner, and two ends of the driving rod protrude out of the waist-shaped holes;

the torsion spring is provided with a spring main body sleeved on the active rod, and the first spring arm and the second spring arm which extend out from two sides of the spring main body, and the second spring arm is abutted against the inner wall of the shell.

Preferably, the torsion spring is two springs symmetrically sleeved on the driving rod.

Preferably, the first and second liquid crystal display panels are,

the wedge block is provided with a sliding groove vertical to the tie bar;

the inner wall of the shell is provided with a guide rail perpendicular to the tie bar, and the guide rail is arranged in the sliding groove to provide guidance for the wedge block.

Preferably, the first and second liquid crystal display panels are,

the wedge block has the sliding groove perpendicular to the tie bar on the far end, and the far end inner wall of the shell has the guide rail perpendicular to the tie bar.

Preferably, the first and second liquid crystal display panels are,

the wedge block is provided with a guide rail vertical to the tie bar;

the inner wall of the shell is provided with a sliding groove perpendicular to the tie bar, and the guide rail is arranged in the sliding groove to guide the wedge block.

Preferably, said wedge has said guide rail perpendicular to said tie rod on a distal end thereof, and said slide groove perpendicular to said tie rod is provided on a distal inner wall of said housing.

Preferably, the wedge is shaped like a right trapezoid having:

a square body;

the oblique wedge angle of the right triangle can be wedged into the wedge-shaped groove of the tie bar, the right-angled side edge of the oblique wedge angle is integrally formed on the side edge of the square main body, and the oblique wedge angle is provided with a wedge-shaped inclined surface.

Preferably, the housing has a tie rod hole on each of two side walls of the wedge-shaped inclined surface of the wedge block facing towards and facing away from each other.

Preferably, the housing is integrally formed with a central portion of one side of the outer anchor body by a side wall of the housing having a tie rod hole facing a wedge-shaped slope of the wedge.

Preferably, the outer anchor body has:

a contact surface which can be abutted against the outer wall of the left ventricle; and

and the non-contact surface is opposite to the contact surface, and the locking structure is fixed in the center of the non-contact surface.

Preferably, a through lock hole is formed in the center of the outer anchor body, the tie bar is inserted into the through lock hole, and the outer shell of the locking structure is fixedly arranged at the lock hole of the outer anchor body on the side wall of the wedge-shaped inclined surface of the wedge block.

It is yet another object of the present invention to provide a left ventricle volume reduction device, which includes:

a tie bar for a left ventricular volume reduction device of the present invention;

the inner anchor is arranged in the twisted hole at the head end of the square connecting section of the tie bar in a penetrating way;

one the outer anchor for left ventricle volume reduction device, the tie rod passes a pair of tie rod hole of the shell of the locking structure of outer anchor, the oblique wedge angle of agreeing with the wedge groove of the square linkage section of tie rod agree with and connect.

Preferably, the internal anchor has:

a contact surface adapted to abut against the right ventricular septum; and

a non-contact surface opposite to the contact surface, wherein at least one side edge of the non-contact surface extends towards the middle part of the non-contact surface to form a barb which is generally parallel to the non-contact surface, and a guide cavity which can provide guidance for the snare is formed by the space between the barb and the non-contact surface.

Preferably, the two opposite side edges of the non-contact surface respectively extend towards the middle direction of the non-contact surface to form the barbs which are generally parallel to the non-contact surface.

Preferably, the two barbs on the two opposite sides of the non-contact surface are spaced apart by a distance that forms a barb opening for the snare to enter the guide lumen.

Preferably, the terminal end of the guide lumen terminates at the center of the lateral end of the inner anchor.

Preferably, the barb is provided with a guide salient point which is protruded out of the guide cavity and used for prompting the guide end point near the end point of the guide cavity.

Preferably, the barb is U-shaped.

Preferably, the main body of the inner anchor is rectangular parallelepiped.

Preferably, the inner anchor has a guidewire lumen at an axial center thereof through which a guidewire passes.

Preferably, the side end of the inner anchor is a spherical end surface.

Preferably, the contact surface of the inner anchor has a tie-rod groove for receiving and retaining a tie rod in the axial direction.

Preferably, the middle part of the contact surface of the inner anchor is provided with a hinge part respectively positioned at two sides of the tie bar groove and a tie bar shaft crossing the tie bar groove and used for penetrating the tie bar, and two ends of the tie bar shaft are respectively fixed at the middle part of the hinge part.

Preferably, the cross-section of the inner anchor is i-shaped.

The object of the utility model is also to provide a locking structure of left ventricle volume reduction device, locking structure has:

a wedge block which can be locked on the tie bar;

Preferably, the link member has:

a driving lever;

the near ends of the two end rods respectively penetrate through the two ends of the driving rod, and the far ends of the two end rods respectively penetrate through the two ends of the driven rod and are located on the two sides of the near end of the wedge block.

Preferably, the locking structure further has:

at least one torsion spring capable of re-locking the wedge block on the tie bar is sleeved on the active rod, and a first spring arm of the torsion spring abuts against the side wall of the wedge block.

Preferably, the locking structure further has:

the wedge, the connecting rod piece and the torsion spring are arranged in the shell; the shell is provided with a pair of waist-shaped holes on two side walls vertical to the wedge-shaped inclined plane of the wedge block, and the axial directions of the waist-shaped holes are parallel to the axial direction of the tie bar;

the torsion spring is provided with a spring main body sleeved on the driving rod, and a first spring arm and a second spring arm which extend out from two sides of the spring main body, and the second spring arm is abutted against the inner wall of the shell.

Preferably, the torsion springs are two torsion springs symmetrically sleeved on the driving rod.

Preferably, the first and second liquid crystal display panels are,

the wedge block is provided with a sliding groove vertical to the tie bar;

Preferably, the first and second air flow paths are arranged in parallel,

Preferably, the first and second liquid crystal display panels are,

the wedge block is provided with a guide rail vertical to the tie bar;

Preferably, the first and second liquid crystal display panels are,

the wedge has the guide rail perpendicular to the tie bar on the distal end, and the distal inner wall of the housing has the slide groove perpendicular to the tie bar.

Preferably, the wedge is shaped like a right trapezoid having:

a square body;

the inclined wedge angle of the right triangle can be wedged into the wedge-shaped groove of the tie rod, the right side edge of the inclined wedge angle is integrally formed on the side edge of the square main body, and the inclined wedge angle is provided with a wedge-shaped inclined surface.

Preferably, the locking structure further has:

and the unlocking pliers are positioned outside the shell, clamped at two ends of the driving rod of the connecting rod piece, and can clamp and move the driving rod to the near end along the axial directions of the two kidney-shaped holes of the shell, so that the wedge block is unlocked from the tie rod through the connecting rod piece.

Preferably, the unlocking pliers have:

two parallel binding clip;

the head ends of the forceps handles are respectively connected with the forceps heads integrally.

Preferably, the binding clip has a clip body, the clip body of the two binding clips has two opposite clip inclined planes towards the handle side, and the clip inclined planes can be connected with two ends of the driving rod in a clamping manner.

Preferably, the head end of the forceps handle is connected with the forceps head to form an obtuse angle.

Preferably, the two forceps handles are fixedly connected in a crossed mode and cannot approach each other.

The object of the utility model is also to provide a left ventricle volume reduction conveying system, have:

a tie bar;

an outer anchor having a locking structure with an opposed pair of tie rod holes, the tie rod passing through the pair of tie rod holes of the locking structure of the outer anchor;

a force metering conveyor passing outside the proximal section of said tie bar, said force metering conveyor having:

the inner part of the measuring tube is penetrated with the tie bar, the distal end of the measuring tube can be propped against the locking structure of the outer anchor, and the proximal section of the measuring tube is fixedly provided with a force measuring baffle;

the far end face of the tail end plate is fixedly provided with a tail pipe towards the far end, and the near end of the force metering pipe penetrates into the tail pipe;

the near section of the force measuring pipe and the tail pipe are arranged in the spring in a penetrating mode, the far end of the spring abuts against the near end face of the force measuring baffle, and the near end of the spring abuts against the far end face of the tail end plate.

The pressure of the left ventricle is conducted to the force tube through the external anchor to press the spring through the force-measuring flap to measure the pressure.

Preferably, the first and second air flow paths are arranged in parallel,

the proximal end of the tie rod passes out of the proximal end of the tailpipe.

Preferably, the metering conveyor further has:

the tail end plate is fixed at the near end in the handle near-segment shell, the force measuring baffle can be axially and freely movably arranged in the handle near-segment shell, and the spring is positioned in the handle near-segment shell.

Preferably, the force measuring conveyor further has:

the middle section of the force measuring tube can freely and axially penetrate through the handle far section shell, the handle far section shell is provided with an axial through hole, and the outer surface of the handle far section shell at the position along the axial through hole is provided with a plurality of force measuring scales;

the middle section of the force measuring pipe is fixedly provided with an identification rod, the identification rod can axially and freely penetrate through the axial through hole, and the left ventricle pressure is obtained according to the force metering scale pointed by the identification rod.

Preferably, a radial through hole is integrally formed at the far end of the axial through hole in the radial direction, and the marking rod is pushed into the radial through hole to lock the force counting conveyor.

Preferably, the marking lever has:

the identification block is fixed outside the middle section of the force measuring pipe;

and the protruding rod is fixed on the identification block and protrudes out of the axial through hole.

Preferably, the first and second liquid crystal display panels are,

the tie bar is provided with a square connecting section, and one side wall of the square connecting section is provided with a plurality of wedge-shaped grooves inclined in the same direction;

the locking structure has: a wedge block, the inclined wedge angle of the wedge block can be in fit connection with the wedge groove on the tie bar for locking; a link member for disengaging the wedge angle of said wedge from the wedge groove of said tie rod, the distal end of said link member being disposed through the proximal end of said wedge.

Preferably, the link member has:

a driving lever;

Preferably, the locking structure further has:

two ends of the driving rod are respectively arranged in a pair of waist-shaped holes of the shell in a penetrating way, and two ends of the driving rod protrude out of the waist-shaped holes;

Preferably, the first and second air flow paths are arranged in parallel,

the wedge block is provided with a sliding groove vertical to the tie bar;

Preferably, the first and second air flow paths are arranged in parallel,

the distal end of the wedge has the sliding groove perpendicular to the tie bar, and the distal end inner wall of the housing has the guide rail perpendicular to the tie bar.

Preferably, the first and second air flow paths are arranged in parallel,

the wedge block is provided with a guide rail vertical to the tie rod;

Preferably, the first and second liquid crystal display panels are,

Preferably, the wedge is shaped like a right trapezoid having:

a square body;

Preferably, the casing is provided with the tie rod holes on two side walls of the wedge-shaped inclined surface of the wedge block facing to each other and facing away from each other.

Preferably, the locking structure further has:

Preferably, the unlocking pliers have:

two parallel binding clip;

Preferably, the clamp head has a clamp body, and the clamp body of the two clamp heads has two clamp inclined planes oppositely arranged towards the clamp handle side, and the clamp inclined planes can be connected with two ends of the driving rod in a clamping manner.

Preferably, two adjacent wedge-shaped grooves are arranged closely, i.e. without gaps.

Preferably, the section of the wedge-shaped groove is a right triangle:

Preferably, the head end of the square connecting section is provided with a hinge hole.

Preferably, the guide segment has a guide hole for a guide wire to pass through the guide wire channel near the head end of the square connecting segment.

Preferably, the outer anchor has the locking structure and an outer anchor body having:

Preferably, a through lock hole is formed in the center of the outer anchor body, the tie bar is inserted into the through lock hole, and the outer shell of the locking structure is fixedly arranged at the lock hole of the outer anchor body on the side wall of the wedge-shaped inclined surface of the wedge block facing the wedge block.

Preferably, the left ventricular volume reduction delivery system further comprises:

and the inner anchor penetrates through the head end of the square connecting section of the tie bar.

Preferably, the inner anchor is inserted into a twisted hole at the head end of the square connecting section of the tie bar.

Preferably, the inner anchor has:

a contact surface adapted to abut against the right ventricular septum; and

a non-contact surface opposite to the contact surface, wherein at least one side edge of the non-contact surface extends towards the middle of the non-contact surface to form a barb which is generally parallel to the non-contact surface, and a guide cavity which can provide guidance for the snare is formed in a space between the barb and the non-contact surface.

Preferably, the two opposite side edges of the non-contact surface extend towards the middle of the non-contact surface respectively to form the barbs which are substantially parallel to the non-contact surface.

Preferably, the two barbs on opposite sides of the non-contact surface are spaced apart by a distance that forms a barb opening for the snare to enter the guide lumen.

Preferably, the terminus of the guide lumen terminates at the center of the lateral end of the inner anchor.

Preferably, the barb is U-shaped.

Preferably, the main body of the inner anchor is rectangular parallelepiped.

Preferably, the side end of the inner anchor is a spherical end surface.

Preferably, the cross section of the inner anchor is I-shaped.

The utility model discloses an actively advance the effect and lie in:

1. the utility model improves the tie bar, a plurality of wedge-shaped grooves which incline in the same direction are arranged on one side wall of the square connecting section of the tie bar, and the structure of the locking structure is improved, the wedge block with the inclined wedge angle is arranged in the locking structure and is in fit connection with the wedge groove of the tie bar, so that the holding power of the outer anchor and the tie bar is improved, and the risk that the outer anchor slips off the tie bar is greatly reduced.

2. And the connecting rod is arranged in the locking device, the unlocking clamp is arranged, and the connecting rod is pulled along the waist-shaped hole on the shell of the locking structure through the unlocking clamp, so that the inclined wedge angle of the wedge block is released from the wedge-shaped groove to unlock the locking structure, and the purpose of recovering the outer anchor is achieved.

3. The utility model discloses a control direction and the tie rod of anchor locking and dissociation outside the control are in same direction, greatly reduced the degree of difficulty of operation locking and unblock.

4. The utility model discloses a non-contact surface at interior anchor sets up the barb, can hang and lean on the snare to when the anchor in operation failure or follow-up needs take out, thereby only need hang the barb of establishing on interior anchor with the snare and pull out the interior anchor from carrying in the sheath pipe in vitro, and need not carry out the operation of opening the chest, have the function that the secondary intervenes the recovery, increase the fault-tolerant rate of operation, alleviate patient economic burden, avoid high risk operations such as the operation of opening the heart, the patient of making good fortune.

5. The utility model discloses because the setting of unblock pincers, can be so that the oblique wedge angle of agreeing with the piece and the wedge groove of tie rod be in the state of separating always, consequently there is not frictional force between tie rod and the outer anchor this moment, uses with the cooperation of meter power conveyer again, improves the accuracy of dynamometry, and whole structure constitutes the left ventricle volume reduction conveying system that can accurate dynamometry. And this count power conveyer with the utility model discloses a tie rod of contract-shaped groove and the locking structure cooperation of contract-shaped piece, consequently locking structure latched position is very accurate, and the front and back can be many times with the wedge angle contract-shaped inslot of the same position of tie rod of the contract-shaped piece of locking structure, can obtain the same dynamometry result many times, has improved the accuracy.

Drawings

Fig. 1A is a schematic perspective view of the left ventricle volume reduction device of the present invention;

fig. 1B is a schematic structural view of the left ventricle volume reduction conveying system of the present invention;

fig. 2A to 2B are schematic structural views of the tie bar 10 of the present invention;

FIGS. 3A-3D are schematic structural views of the recoverable inner anchor of the present invention;

FIG. 3E is a schematic view of the recycling process of the recyclable inner anchor according to the present invention;

FIGS. 4A-4B are schematic structural views of the outer anchor of the present invention;

fig. 5A to 5F are schematic structural views of the locking structure of the present invention;

fig. 6A to 6D are schematic structural views of the force-counting conveyor of the present invention;

fig. 7A to 7D are schematic structural views illustrating the implantation process of the left ventricle volume reduction device of the present invention.

Detailed Description

In order to make the technical means, creation characteristics, achievement purposes and functions of the present invention easy to understand, the present invention is further explained by combining with specific drawings.

In the field of interventional medical devices, the "distal end" is defined as the end that is distal from the operator during the procedure, and the "proximal end" is defined as the end that is proximal to the operator during the procedure.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; the connection can be mechanical connection, electrical connection or communication connection; either directly or indirectly through intervening media, either internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The locking and unlocking member of the present invention is a device that can lock or unlock the locking structure in the conveying device.

As shown in FIG. 1A, the left ventricular volume reduction device of the present invention comprises a tie bar 10, an inner anchor 20 and an outer anchor 30, the inner anchor 20 being hingably connected to a distal end of the tie bar 10; the outer anchors 30 are threaded through the tie rod 10. The utility model provides a left ventricle subtracts appearance device will inside and outside anchor embedding ventricular wall, sews up unnecessary scar tissue to help the heart to resume its previous shape and function.

As shown in fig. 1B, the left ventricle volume reduction conveying system of the present invention comprises a tie bar 10, an inner anchor 20, an outer anchor 30 and a force measuring conveyor 40, wherein the inner anchor 20 can be hinged at the far end of the tie bar 10; the outer anchors 30 are threaded through the tie rod 10. The utility model provides a left ventricle subtracts appearance device imbeds the ventricular wall with interior external anchor, sews up unnecessary scar tissue to help the heart to resume its previous shape and function. And since the amount of excess scar tissue required to be sutured varies from patient to patient, by measuring the volume of the left ventricle being reduced in advance, the external anchor 30 is given an indication of where the tie rod 10 should be locked to achieve accurate left ventricle volume reduction. Therefore, the force measuring conveyor 40 with force measuring function of the present invention can accurately solve the problem.

The utility model discloses a tie rod can be ordinary tie rod among the prior art, also can be three-section formula, as fig. 2A, tie rod 10 has square linkage segment 11, guide segment 12 and syringe needle section 13 from the distal end to the near-end, and square linkage segment 11, guide segment 12 and syringe needle section 13 are according to distal end to the order integrated into one piece of near-end. The proximal needle section 13 is made of a high hardness metal such as stainless steel or a polymer material. The distal end of the connecting section 11 has a hinge hole 111. The guide section 12 and the needle 13 respectively have mutually communicated guide wire channels in the axial centers. The leading end of the guiding segment 12 near the connecting segment 11 has a guide hole 121 for the guide wire to pass into the guide wire channel. The tie bar 10 may be made of a polymer material such as stainless steel, platinum iridium alloy, PEEK, and the like.

In a preferred example, the square connecting section 11 has two opposite wide side walls and two opposite narrow side walls, as shown in fig. 2B. A plurality of wedge-shaped grooves 112 inclined in the same direction are formed in one wide side wall, and every two adjacent wedge-shaped grooves 112 are arranged closely, namely are close to each other, and no gap exists between every two adjacent wedge-shaped grooves 112. The wedge groove 112 has a cross section of, for example, a right triangle. A first right-angle side of the right triangle is a planar line segment along the surface of the wide side wall; the second right-angle side of the right-angle triangle vertically extends from the near end of the first right-angle side as a starting point to the inside of the square connecting section 11 as an end point; the hypotenuse of the right triangle extends straight obliquely from the end point of the second cathetus to the distal end of the first cathetus. So a plurality of right triangle's wedge groove 112 along same direction slope, wedge groove 112 is the right angle side towards proximal direction to reach the purpose of locking, even if long-time also can not receive the influence that the heart beats and influence the locking of outer anchor locking structure at the left ventricle outer wall of heart, also can not the landing.

The inner anchor of the utility model can be the inner anchor with any structure form in the prior art, as long as the inner anchor can be arranged on the right ventricular septum of the heart. However, to reduce the risk of an open chest procedure by requiring removal of the left ventricular volume reduction device after a failed heart volume reduction device implantation procedure or later in the patient, the present invention provides an exemplary retrievable internal anchor 20, shown in fig. 3A-3E. The retrievable inner anchor 20 has a substantially rectangular parallelepiped body with two sides, one side being a contact side 21 and the other side being a non-contact side 22. The contact surface 21 is a surface attached to the right ventricular septum of the heart after being implanted; the non-contact surface 22 is a surface that is not attached to the heart after implantation, i.e., a surface opposite to the contact surface 21. The inner anchor 20 has a guidewire lumen 213 at the axial center thereof for the guidewire to pass through during surgical delivery of the inner anchor, and the guidewire lumen 23 may be square, circular, or any other hollow lumen of any shape, preferably a circular through-hole, so long as it allows the guidewire to pass through. The side end of the inner anchor 20 may be any smooth curved surface shape, preferably a spherical end surface, which is beneficial for the inner anchor 21 to smoothly enter the conveying sheath, and reduces the conveying resistance. The contact surface 21 may abut against the right ventricular septum. The contact surface 21 may be without a tie rod groove as in the prior art, and the tie rod 10 is pressed against the contact surface 21 during the feeding of the internal anchor. In order to reduce the size of the conveying sheath, it is better that the contact surface 21 is provided with a tie bar groove 211 along the axial direction, during the conveying of the inner anchor, the tie bar 10 is accommodated in the tie bar groove 211, and the volume of the inner anchor and the tie bar during the conveying is reduced; meanwhile, the tie bar groove 211 also limits the tie bar 10, and the tie bar 10 is bound in the tie bar groove 211 to regulate the movement of the tie bar 10 and avoid damaging heart tissues. The tie bar 10 may be pivotally connected to the middle portion of the contact surface 21, preferably, the tie bar 10 is non-detachable, for example, the middle portion of the contact surface 21 has hinge portions 212 respectively located at both sides of the tie bar groove 211 and a tie bar shaft 213 crossing the tie bar groove 211 for penetrating the tie bar 10, both ends of the tie bar shaft 213 are respectively fixed to the middle portion of the hinge portions 212, the hinge portions 212 serve as support points for both ends of the tie bar shaft 213, the tie bar shaft 213 cannot be detached from the hinge portions 212, and the hinge holes 111 of the tie bar 10 are penetrated in the tie bar shaft 213 of the inner anchor 20.

The non-contact surface 22 of the retrievable inner anchor 20 faces away from the contact surface 21. At least one side edge of the non-contact surface 22 extends towards the middle of the non-contact surface 22 to form a barb 221 which is substantially parallel to the non-contact surface 22, so as to facilitate the capture of the inner anchor 20 by the snare 91. Preferably, two opposite sides of the non-contact surface 22 extend towards the middle of the non-contact surface 22 to form barbs 221 substantially parallel to the non-contact surface 22, and the barbs on both sides are more favorable for catching the inner anchor 20 by the snare 91. Barbs 221 extend out of two side edges of the non-contact surface 22, so that the cross section of the inner anchor is I-shaped, and the I-shaped cross section is favorable for accumulating snare wires in a cavity of the I-shaped cross section of the inner anchor when the snare 91 drives the inner anchor 20 to withdraw, and reduces resistance to withdrawing the inner anchor 20. The barb 221 can be in a long plate shape, but the barb can be in a U shape, so that the endothelialization adhesion growth of the inner anchor 20 in the body is reduced, and the subsequent recovery is facilitated. The space between the barb 221 and the non-contact surface 22 forms a guide lumen 222 that can provide guidance for the snare 91. The recoverable inner anchor 20 is provided with a barb 221 on one side of the inner anchor, which can be hooked by the snare 91, so that the inner anchor 20 can be recovered from the delivery sheath by withdrawing the inner anchor 20, and the inner anchor does not need to be taken out by an open heart surgery. In the case where barbs 221 extend from opposite sides of the non-contact surface 22, the barbs 221 on opposite sides of the non-contact surface 22 are spaced apart from one another, i.e., the barbs 221 are not abutted, and the spacing defines a barb opening 223 that captures the snare 91 into the guide lumen 222. At this time, the guide cavity 222 extends from the barb opening 223 as a starting point along a straight line direction parallel to the non-contact surface 22 of the inner anchor, and when the guide cavity 222 extends to a position which is near to but not yet reaching the side end of the inner anchor 20, the guide cavity 222 begins to bend and extend towards the axial center of the inner anchor 20, and finally the guide cavity 222 is stopped at the axial center of the side end of the inner anchor 20, namely the guide cavity 222 is stopped at the guide wire cavity 23 at the axial center. The arrangement is that the snare 91 hung in the guide cavity 222 is positioned at the central position of the inner anchor 20 when the inner anchor 20 is captured during the recovery of the inner anchor, so that the movement guidance of the snare 91 is facilitated, and the position of the snare 91 at the central position of the inner anchor 20 when the inner anchor 20 is captured is favorable for the inner anchor 20 to enter a conveying sheath. And the barb 221 has a guide projection 224 protruding from the guide cavity 222 near the end of the guide cavity 222 for indicating the end of the guide. When the snare 91 moves to this position, the capture of the inner anchor 20 by the snare is completed in combination with an external imager, and the corresponding operation of withdrawing the snare 91 can be performed. The inner anchor 20 of this example may be integrally formed in one piece. The inner anchor material can be made of one or a combination of a plurality of metal materials with better biocompatibility and toughness, such as stainless steel, titanium, nickel-titanium alloy and the like. The contact surface of the inner anchor or the entire inner anchor may also be coated with a polyester coating or surface coating to cushion contact between the inner anchor and the heart tissue and increase the rate of endothelialization and reduce the corresponding inflammatory response.

The outer anchor of the utility model can be an outer anchor with any structure in the prior art and is used for removing scar structures of the left ventricle. As shown in fig. 4A-4B, one form of construction of the outer anchor, such as outer anchor 30, is a generally flat, rectangular parallelepiped having an outer anchor body 30a that also has two sides, a contact side that can abut the outer wall of the left ventricle and a non-contact side opposite the contact side that secures the locking structure. A through locking hole (not shown) is provided at the center of the outer anchor body 30a, and the locking hole is provided through the tie rod 10. The outer anchor material can be made of one or a plurality of metal materials with better biocompatibility and toughness, such as stainless steel, titanium, nickel-titanium alloy, cobalt-chromium alloy, platinum-iridium alloy and the like, the contact surface of the outer anchor or the whole outer anchor main body can be covered with a polyester coating or subjected to surface coating treatment, the coating structure buffers the contact between the outer anchor and heart tissue, and meanwhile, the endothelialization speed can be increased, and the corresponding inflammatory reaction can be reduced.

The utility model discloses a strengthen the firmness of outer anchor 30 closure on tie rod 10, be provided with the locking structure on the lock hole position of outer anchor main part 30a is in the non-contact surface, the utility model discloses a locking structure can be the structure that can tightly lock outer anchor 30 and tie rod 10 each other wantonly. As shown in fig. 5A to 5F, the locking structure of the present invention includes a wedge 31 lockable on the tie bar 10, a link 32 capable of disconnecting the wedge 31 from the tie bar 10, a distal end of the link 32 penetrating the proximal end of the wedge 31, a return torsion spring 33, a housing 34 enclosing the wedge 31, the link 32, and the torsion spring 33, and a releasing clamp 35 located outside the housing 34 for pulling the link 32 toward the proximal end.

In this example, the wedge 31 is shaped like a right trapezoid with a square body 311 and a slanted wedge angle 312 of a right triangle; the right-angled side of the tapered wedge 312 is integrally formed on the long side of the square body 311, and the tapered wedge 312 has a wedge-shaped slope. The tapered wedge 312 may wedge into the wedge groove 112 of the tie bar 10 to achieve locking. And because the plurality of wedge-shaped grooves 112 are arranged at different positions along the length direction of the tie rod 10, the inclined wedge angle 312 can be wedged into a proper wedge-shaped groove 112 to achieve the purpose of accurate volume reduction according to different volume reduction requirements of the left ventricle. In one example, the wedge 31 has a slide groove 313 perpendicular to the tie bar 10, such as at the distal end of the wedge 31. In another possible example, the block 31 has a rail (not shown) perpendicular to the tie bar 10, for example on the distal end of the block 31.

In this example, the link member 32 has an active rod 321 and a passive rod 322, the passive rod 322 and the active rod 321 are parallel, and the passive rod 322 is disposed through the proximal end of the wedge 31. The link member 32 further has two end rods 323 for connecting the passive rod 322 and the active rod 321, specifically, the proximal ends of the two end rods 323 are respectively inserted into the two ends of the active rod 321, and the distal ends of the two end rods 323 are respectively inserted into the two ends of the passive rod 322. And two end rods 323 are located on either side of the proximal end of the compact 31.

In this example, 2 torsion springs 33, symmetrically disposed, are disposed around the active rod 321. The torsion spring 33 is provided to re-lock the disengaged wedge 31 with the wedge groove 112. The torsion spring 33 has a spring body 333 fitted to the active lever 321, and a first spring arm 331 and a second spring arm 332 extending from both sides of the spring body 333. The first arm 331 of the torsion spring 33 abuts against the side wall of the wedge. The second spring arm 332 abuts against the inner wall of the housing 33. When the releasing clamp 35 is released from the release driving rod 321, the wedge 31 released from the tie bar 10 can be relocked in the wedge groove 112 of the tie bar 10 due to the reset spring force, which is influenced by the compression of the first spring arm 331 and the second spring arm 332 of the torsion spring 33.

In this example, the housing 34 of the locking structure is a square box structure and can be fixed at the locking hole in the center of the non-contact surface of the outer anchor body 30 a. The housing 34 is provided with a wedge 31, a link member 32, and a torsion spring 33, and covers and wraps the wedge, the link member, and the torsion spring. In addition, the housing 34 has a pair of waist-shaped holes 341 on two side walls perpendicular to the wedge-shaped inclined surface of the wedge 31, and the axial direction of the waist-shaped holes 341 is parallel to the axial direction of the tie bar 10. Both ends of the driving rod 321 are respectively inserted into a pair of waist-shaped holes of the housing 341 and both ends of the driving rod 321 protrude out of the waist-shaped holes 341; with such a design, the two heads of the releasing clamp 35 can clamp the two ends of the driving rod 321 protruding out of the housing 34, and pull the driving rod 321 back along the proximal end of the waist-shaped hole 341. As shown in fig. 5F, the link 32 drives the passive rod 322 to move away from the wedge-shaped groove 112 of the tie bar 10, so as to pull the inclined wedge angle 312 of the wedge 31 out of the wedge-shaped groove 112, thereby achieving the purpose of unlocking. In this example, a guide 342 perpendicular to the tie bar 10 is provided on an inner wall, e.g., a distal inner wall, of the housing 34, and the guide 342 is provided in the slide groove 313 of the wedge 31 to provide a guiding function to the wedge 31 during the wedge 31 is pulled out from the wedge groove 112. In another possible example (not shown), the inner wall of the housing 34, for example the distal inner wall, has a sliding groove perpendicular to the tie bar 10, and the guide rail at the distal end of the wedge 31 is provided in the sliding groove, which can also serve to guide the wedge 10. The housing 34 has tie rod holes 343 on both side walls of the wedge 31 facing and facing away from the wedge.

In this example, an unlocking clamp 35 is provided, which is located outside the housing 34 and clamped at both ends of the driving rod 321 of the link member 32, and can clamp and move the driving rod 321 to the proximal end along the axial direction of the two kidney-shaped holes 341 of the housing 34, so that the wedge 31 is separated from the wedge groove 112 of the tie bar 10 by the link member 32, thereby achieving the purpose of unlocking. The unlocking pliers 35 are slightly different from the common pliers, have a simpler structure and are provided with two parallel pliers heads 351; the clamp head 351 has a clamp body, and the clamp body of the two clamp heads 351 has two opposite clamp inclined surfaces 353 facing the clamp handle 352, and the clamp inclined surfaces 353 can be connected with two ends of the driving rod 321 in a clamping manner. The unlocking pliers 35 is further provided with two mutually crossed pliers handles 352, the pliers handles 352 are used for being held by an operator, the head ends of the pliers handles 352 are respectively connected with the pliers heads 351 integrally, and the head ends of the pliers handles 352 are connected with the pliers heads 351 to form an obtuse angle, so that the pliers are more conveniently held in the form of the obtuse angle. The two handles 352 are fixedly connected in a crossed and non-approaching manner, i.e., the two handles 352 are not movable and rotatable with each other. Since the two opposite clamp inclined surfaces 353 of the 2 clamp heads 351 have gradually increased distance therebetween, the two opposite clamp inclined surfaces 353 always have a distance of one distance to match the length of the active rod 321, and thus a proper position can be found for clamping and clamping the active rod 321. Through the operation of the unlocking pliers 35, the external anchor can be recovered, the locking structure can be adjusted to be in the locking position on the tie bar 10, the unlocking pliers 35 can be used for eliminating the friction force of the locking structure on the tie bar in the subsequent force measuring process.

As shown in fig. 6A-6D, in this example, the gauge conveyor may be any configuration of gauge conveyor known in the art. The present example provides a force conveyor 40 that measures more accurately. The force-measuring conveyor 40 of this example is threaded outside the proximal section of the tie rod 10 and has a handle distal section shell 45 and a handle proximal section shell 46 fixedly connected together, the function of the handle shell being primarily for gripping. A force measuring tube 41, a force measuring baffle 42, a spring 44 and a tail end plate 43 fixed at the proximal end of a handle proximal section shell 46 are movably arranged in the handle shell in a penetrating way. The gauge tube 41 is internally provided with a tie rod 10. The distal end of the force tube 41 can abut against the locking structure of the outer anchor 30, and a force-measuring baffle 42 is fixedly arranged outside a certain position of the proximal section of the force tube 41. The middle section of the force tube 41 is freely axially inserted into the distal handle section housing 45. The load cell 42 is freely axially movably disposed within the handle proximal housing 46, and the spring 44 is also disposed within the handle proximal housing 46. A tail tube 431 is fixedly provided at the distal end of the end plate 43, and the proximal end of the force measuring tube 41 penetrates into the tail tube 431. The proximal end of the tie rod 10 passes out of the proximal end of the tailpipe 431. The proximal section of the gauge tube 41 and the tail tube 431 are arranged in the spring 44 in a penetrating manner, and the distal end of the spring 44 abuts against the proximal end face of the force measuring baffle 42, and the proximal end of the spring 44 abuts against the distal end face of the tail end plate 43; when the force tube 41 abuts against the outer wall of the left ventricle, the heart gives the force tube 41 a reaction force which also acts on the force-measuring cell 42. The proximal spring 44 is now compressed by the force of the force-measuring flap 42, so that the heart pressure can be measured by the force-measuring flap pressing against the spring 44. Not only this, the present example can also accurately measure the magnitude of the pressure by setting as follows. The handle distal shell 45 is provided with an axial through hole 451, and the outer surface of the handle distal shell 45 at the position along the axial through hole 451 is provided with a plurality of force-measuring scales 452; an identification rod 453 is fixedly arranged outside the middle section of the force measuring pipe 41. The marking rod 453 has a marking block 454 fixed outside the middle section of the force measuring tube 41. The marking rod 453 further has a protruding rod 455, and the protruding rod 455 is fixed to the marking block 454 and protrudes out of the axial through hole 451. The marking rod 453 is freely axially extended out of the axial through hole 451, and the left ventricle pressure is known from the force-counting scale 452 pointed by the marking rod 453. The distal end of the axial through hole 451 is integrally penetrated with a radial through hole 456 in the radial direction, and the marking rod 453 is pushed into the radial through hole 456 to lock the force measuring conveyor. Because the locking structure of the utility model can be used for dissociating the wedge 31 and the wedge groove 112 through dissociating the forceps, the locking structure can not be influenced by force in the process of force measurement, and the heart pressure can be more accurately measured.

As shown in fig. 7A to 7D, the implantation process of the left ventricle volume reduction device of the present invention is as follows:

the puncture of scar positions and ventricular septum positions of a left ventricle is completed by utilizing a near-end needle head section 13 or other puncture pieces on the tie bar 10, the puncture sheath is inserted into the puncture sheath, a channel between a right ventricle and an epicardium region is established, an expander in the puncture sheath is withdrawn, the J-shaped guide wire 92 is inserted into the puncture sheath, the capture of the J-shaped guide wire 92 is completed by utilizing a snare 91 inserted into the conveying device, the J-shaped guide wire 92 is kept in a tightly bound state by the snare 91, the snare 91 is withdrawn, the J-shaped guide wire 92 is pulled into an inner cavity of the conveying device 90, and then the near end of the conveying device is discharged.

Adjusting the puncture sheath tube to enable the distal end of the puncture sheath tube to enter the distal end inner cavity of the conveying device 90, enabling the J-shaped guide wire 92 to enter the proximal end needle head section 13 on the tie bar 10 outside the body, entering the tie bar 10 connected with the inner anchor along the J-shaped guide wire 92, keeping the J-shaped guide wire 92 still, and pushing the tie bar 10 to enable the proximal end of the tie bar to sequentially enter the inner cavity of the conveying device 90, the distal end inner cavity of the puncture sheath tube, the distal end of the conveying device 90, the right ventricle, the left ventricle and the epicardial region. When the tie rod 10 is epicardially advanced, the J-wire 92 can be withdrawn and the tie rod 10 pulled to complete the access to the inner anchor 20.

The position of the inner anchor 20 is confirmed by imaging, and when the inner anchor 20 approaches the right ventricular septal location, the distal end of the puncture sheath is withdrawn to the left ventricle, and the delivery device 90 is withdrawn, so that the inner anchor 20 is released at the right ventricular septal location.

The square connecting section 11 is cut off at the connecting part of the square connecting section 11 and the guiding section 12, the locking structure of the outer anchor 30 is adjusted to be in a releasing state, the outer anchor 30 enters the outer anchor 30 along the square connecting section 11, and the contact surface of the outer anchor 30 is ensured to be in contact with scar tissues in the epicardial region.

And (3) shortening the distance between the inner anchor and the outer anchor, simultaneously keeping the proper compression force of the heart, wherein the proper compression force can not be too large or too small, the optimal force is 1-6N, operating an external locking and releasing piece, locking a locking structure, cutting off the redundant square connecting section 11, and completing the implantation of the left ventricle volume reduction device. The above steps are repeated according to the anatomical structure and the actual requirement of the heart of the patient, and a plurality of pairs of anchors can be implanted, generally 2-4 pairs.

When the operation fails or the patient needs to remove the left ventricular volume reduction device, the patient enters the conveying device 90 along the right jugular vein, the dilator in the conveying device 90 is withdrawn, the snare 91 enters the conveying device 90, the snare captures the barb opening 223 on the inner anchor 20 by the aid of the support of the imager, the barb 221 of the inner anchor 20 is smoothly captured, the snare 91 is tightened, when the snare 91 contacts the guide salient point 224, the imager prompts the snare to finish capturing the inner anchor, the outer anchor 30 is used for releasing the locking of the tie rod 10, the fastening state of the snare to the inner anchor 20 is maintained, the inner anchor 20 enters the conveying device 90 while the snare is withdrawn, the conveying device 90 is withdrawn, and the intervention and recovery of the inner anchor 20 can be finished.

The utility model provides a left ventricle subtracts appearance device uses the incision of surgery left chest wicresoft and intervenes right side internal jugular vein and is the operation approach, under the state that the heart does not stop jumping, utilize the seal wire to make a round trip to shuttle back "laying the track" in the heart, like the tight pocket of restrainting, with two accurate placing the ventricular aneurysm edge in of anchor, a left side right side, one inside outside, two sides are pressed from both sides and are hit, make the folding clamp of ventricular aneurysm close, fold together left ventricle scar position and right ventricle, imbed the ventricular wall with a series of anchors, sew up unnecessary scar tissue, with help the heart resume its previous shape and function, patient's left ventricle remodels to being close normal shape and size, remold the ventricle, help improves cardiac function, patient's symptom and quality of life. The utility model discloses a left ventricle subtracts appearance device has recoverable function of interveneeing, avoids in the operation process or takes the open heart operation when the postoperative patient need remove the circumstances such as this left ventricle subtracts appearance device, and recoverable mode has reduced the secondary damage of operation to the patient, alleviates the economic burden of patient and family members.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A locking structure for a left ventricular volume reduction device, the locking structure having:

a wedge block which can be locked on the tie bar;

2. A locking arrangement for a left ventricular volume reduction device as in claim 1, wherein the link member has:

a driving lever;

3. A locking arrangement for a left ventricular volume reduction device as in claim 1, wherein the locking arrangement further has:

4. A locking arrangement for a left ventricular volume reduction device as in claim 3, wherein the locking arrangement further has:

5. A locking arrangement for a left ventricular volume reduction device according to claim 3, wherein the torsion springs are two torsion springs symmetrically disposed about the active rod.

6. A locking arrangement for a left ventricular volume reduction device as in claim 4, wherein

The wedge block is provided with a sliding groove vertical to the tie bar;

7. A locking arrangement for a left ventricular volume reduction device as in claim 6, wherein

8. A locking arrangement for a left ventricular volume reduction device as in claim 4, wherein

The wedge block is provided with a guide rail vertical to the tie rod;

the inner wall of the shell is provided with a sliding groove perpendicular to the tie bar, and the guide rail is arranged in the sliding groove to provide guidance for the wedge block.

9. A locking arrangement for a left ventricular volume reduction device as claimed in claim 8, wherein

10. A locking arrangement for a left ventricular volume reduction device as in claim 1, wherein the wedge is shaped like a right trapezoid having:

a square body;

11. A locking arrangement for a left ventricular volume reduction device as in claim 4, wherein the housing has a tie rod hole on each of two side walls of the wedge facing and facing away from the wedge.

12. A locking arrangement for a left ventricular volume reduction device as in claim 4, wherein the locking arrangement further has:

13. A locking arrangement for a left ventricular volume reduction device as in claim 12, wherein the unlocking forceps have:

two parallel binding clip;

14. A locking arrangement for a left ventricular volume reduction device as in claim 13, wherein

The clamp heads are provided with clamp bodies, the clamp bodies of the two clamp heads are provided with two clamp inclined planes which are oppositely arranged towards the clamp handle side, and the clamp inclined planes can be connected with two ends of the driving rod in a clamping mode.

15. A locking arrangement for a left ventricular volume reduction device as claimed in claim 13, wherein

The head end of the forceps handle is connected with the forceps head to form an obtuse angle.

16. A locking arrangement for a left ventricular volume reduction device as in claim 13, wherein

The two forceps handles are fixedly connected in a crossed mode and cannot be close to each other.