CN114903658A - Locking structure and external anchor of left ventricular volume reducing device - Google Patents

Abstract

The invention discloses a locking structure, an external anchor and a left ventricle volume reducing device. The locking structure has the locking structure and a locking unit, and the locking unit has: a lock that can be pressed against a tie rod The locking piece is a lock block; a pressing piece that can compress the locking piece on the tie rod, the pressing piece is a transmission rod, and one end of the transmission rod is connected with a transmission shaft , the two ends of the transmission shaft pass through the two opposite side ends of the middle part of the lock block, and the lock block is pushed and pulled by the transmission rod to achieve locking and unlocking. The invention further reduces the risk of the outer anchor slipping from the tie rod by improving the structure in the locking structure, and retrieves the outer anchor by unlocking the locking structure; and the locking structure and the tie rod operate in the same direction to lock and unlock, which is very convenient.

Description

Locking structure and external anchor of left ventricular volume reducing device

technical field

The invention belongs to the technical field of medical devices, and in particular relates to a locking structure and an external anchor of a left ventricular volume reducing device.

Background technique

Left ventricular aneurysm (LVA) is a common complication after myocardial infarction. It is because the left ventricle is avascular necrosis of part of the ventricular myocardium after myocardial infarction. Since the necrotic ventricular myocardium loses its contractile function, when the heart contracts, this part of the necrotic myocardium will protrude outward, resulting in the occurrence of ventricular aneurysm. Due to the compensatory effect of the heart, the heart continues to increase in a certain volume, resulting in heart failure and pulmonary congestion.

Left ventricular volume reduction is a transcatheter ventricular augmentation system that can be used to address scar tissue in patients with ischemic cardiomyopathy after myocardial infarction. The left ventricular volume reduction device delivers multiple pairs of anchors (inner and outer anchors) into the body. They clamp the left ventricle and allow other surgical instruments to enter the heart through small incisions in the body surface. This minimally invasive system can also be used for ventricular repair in traditional thoracotomy. In the prior art, the principle of combining the inner and outer anchors is to connect the inner and outer anchors through tie rods, one end of the tie rod is fixed on the inner anchor, and the other end of the tie rod is locked by the locking structure of the outer anchor. At the same time, in the prior art, the control direction for controlling the locking and disengagement of the external anchor is perpendicular to the tie rod, and special instruments are required to cooperate with the locking structure from the vertical direction of the tie rod, which not only increases the difficulty of the operation, but also is extremely inconvenient. More invasive measures are required for the patient, which is not good for the patient's health. Therefore, it is necessary to develop an external anchor (especially a locking structure) with higher integration and better stability to solve the above problems.

SUMMARY OF THE INVENTION

One of the objectives of the present invention is to provide a locking structure for a left ventricular volume reducing device with a completely different structure.

The locking structure for the left ventricular volume reduction device of the present invention has a locking unit, and the locking unit has:

a locking piece that can be pressed against the tie rod, and the locking piece is a lock block;

A pressing piece that can compress the locking piece on the tie rod, the pressing piece is a transmission rod, one end of the transmission rod is connected with a transmission shaft, and both ends of the transmission shaft pass through the The two opposite side ends of the middle part of the lock block are locked and unlocked by pushing and pulling the lock block through a transmission rod.

Preferably,

One side of the lock block is provided with a positioning shaft, and the positioning shaft is parallel to the transmission shaft. The other side is pressed against the surface of the tie rod to achieve locking.

Preferably, the locking structure further has a casing, and the casing is built with the locking unit:

Two opposite first shell walls of the outer casing are respectively provided with positioning shaft support holes, and both ends of the positioning shaft are respectively fixed in the positioning shaft support holes;

A second shell wall of the casing is provided with a transmission rod hole, and the other end of the transmission rod is penetrated in the transmission rod hole.

Preferably,

The middle of the lock block has a hollow transmission cavity, one end of the transmission rod is located in the transmission cavity, and the two ends of the transmission shaft at one end of the transmission rod pass through the two opposite sides of the transmission cavity of the lock block. inside the side wall.

Preferably,

One end of the transmission rod is a cylindrical rod, and the transmission shaft is arranged on one end of the cylindrical rod;

The other end of the transmission rod is a screw rod, one end of the screw rod is screwed into the other end of the cylindrical rod, and the other end of the screw rod is arranged in the transmission rod hole of the second shell wall of the casing.

Preferably,

The side surface of the other section of the cylindrical rod is provided with a right-angled trapezoid groove.

Preferably,

The bottom surface of one end of the cylindrical rod is set as an arc surface in the form of a cylindrical side surface coaxial with the transmission shaft.

Preferably,

The locking unit has a U-shaped limiting groove for limiting the locking block, which is fixed in the housing, and the other side of the locking block is limited to be located in the U-shaped limiting groove.

Preferably, two opposite second shell walls of the housing, that is, the same shell wall as the transmission rod hole, respectively have tie rod holes at corresponding positions where the locking member locks the tie rod.

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

an outer anchor body in the shape of a flat cuboid;

A locking structure is characterized in that: the locking structure is the locking structure for the left ventricular volume reducing device according to the present invention, and the locking structure is fixedly arranged at the center of one side surface of the outer anchor body.

Preferably, the outer anchor body has:

a contact surface against the outer wall of the left ventricle; and

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

Preferably, the central position of the outer anchor body has a through lock hole, the lock hole is used for passing the tie rod, and the second shell wall of the outer shell of the locking structure is fixed on the outer anchor. The keyhole position of the main body.

Another object of the present invention is to provide a left ventricular volume reduction device, which includes:

a tie rod;

an inner anchor, pierced through the head end of the tie rod;

An external anchor, which is inserted into the proximal section of the tie rod, is characterized in that the external anchor is the external anchor for the left ventricular volume reduction device according to the present invention.

Preferably, the tie rod has a square connecting section, a guiding section and a needle section connected in sequence, the inner anchor is pierced through the head end of the square connecting section, and the outer anchor is pierced through the square connecting section. the nearest segment of the segment.

Preferably, the head end of the square connecting section has a twisted hole, and the twisted hole can pass through the tie rod shaft on the inner anchor.

Preferably, the guide section and the needle section have guide wire channels communicating with each other in the axial center respectively.

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

Preferably, the inner anchor has:

a contact surface against the right ventricular septum; and

A non-contact surface opposite to the contact surface, characterized in that at least one side of the non-contact surface extends toward the middle of the non-contact surface with a barb that is substantially parallel to the non-contact surface, The space between the barbs and the non-contact surface forms a guide cavity that provides guidance for the snare.

Preferably, the two opposite sides of the non-contact surface respectively extend toward the middle of the non-contact surface with the barbs that are substantially parallel to the non-contact surface.

Preferably, there is a certain distance between the two barbs on the two opposite sides of the non-contact surface, and the distance forms a barb opening for the snare to enter the guide cavity.

Preferably, the end point of the guide cavity ends at the center of the side end of the inner anchor.

Preferably, the barb near the end point of the guide cavity has a guide bump protruding from the guide cavity for indicating the end point of the guide.

Preferably, the barb is U-shaped.

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

Preferably, the axial center of the inner anchor has a guide wire lumen for the guide wire to pass through.

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 along the axial direction for accommodating and limiting the tie rod.

Preferably, the middle part of the contact surface of the inner anchor has hinge parts located on both sides of the tie rod groove and a tie rod shaft for passing the tie rod across the tie rod groove. , the two ends of the tie rod shaft are respectively fixed in the middle of the hinge part.

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

The positive progressive effect of the present invention is:

1. The present invention provides a new locking structure by improving the structure of the locking structure, reducing the risk of the outer anchor slipping off the tie rod, and by unlocking the locking structure, the outer anchor can be retrieved.

2. The control direction for controlling the locking and disengagement of the outer anchor of the present invention is in the same direction as the tie rod, which greatly reduces the difficulty of operating locking and unlocking.

3. In the present invention, a locking structure with a toothed surface is provided on the outer anchor, and the toothed surface improves the gripping force between the outer anchor and the tie rod, thereby increasing the risk of the outer anchor falling off in the body.

4. In the present invention, by setting the barbs on the non-contact surface of the inner anchor, the snare can be attached, so that when the operation fails or the inner anchor needs to be taken out later, only the barbs on the inner anchor need to be hung with the snare, so as to prevent the delivery from being transported. The inner anchor is pulled out of the body in the sheath without thoracotomy. It has the function of secondary intervention and recovery, which increases the fault tolerance rate of the operation, reduces the economic burden of the patient, avoids high-risk operations such as open-heart surgery, and benefits the patient.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the left ventricular volume reduction device of the present invention;

FIG. 2 is a schematic structural diagram of the tie rod 10 of the present invention;

3A-3D are schematic structural diagrams of the retrievable inner anchor of the present invention;

3E is a schematic diagram of the recovery process of the recyclable inner anchor of the present invention;

4A to 4F are schematic structural diagrams of the locking structure of the present invention;

5A-5D are schematic structural diagrams of the implantation process of the left ventricular volume reducing device of the present invention.

Detailed ways

In order to make it easy to understand the technical means, creation features, achieved goals and effects of the present invention, the present invention will be further described below with reference to specific drawings.

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

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , it can also be integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components or two components. interactions, unless otherwise expressly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

The lock-release member referred to in the present invention refers to a device that can lock and unlock the locking structure in the conveying device.

As shown in FIG. 1 , the left ventricular volume reduction device of the present invention includes a tie rod 10 , an inner anchor 20 and an outer anchor 30 . The inner anchor 20 can be hinged on the distal end of the tie rod 10 ; the outer anchor 30 is penetrated on the tie rod 10 . . The left ventricular volume reducing device provided by the present invention embeds the inner and outer anchors into the ventricular wall, and sutures the excess scar tissue, so as to help the heart to restore its previous shape and function.

The tie rod of the present invention can be a common tie rod in the prior art, such as a straight rod as shown in FIG. 4A; it can also be a three-section type, as shown in FIG. 2, the tie rod 10 has a square shape from the distal end to the proximal end. The connecting section 11, the guiding section 12 and the needle section 13, the square connecting section 11, the guiding section 12 and the needle section 13 are integrally formed in the sequence from the distal end to the proximal end. The proximal needle segment 13 is made of high-hardness metal such as stainless steel or a polymer material. The distal end of the connecting segment 11 has a twist hole 111 . The guide section 12 and the needle 13 section have guide wire channels communicating with each other in the axial center respectively. The leading end of the guide section 12 near the connecting section 11 has a guide hole 121 for the guide wire to pass through the guide wire channel. The tie rod 10 may be made of stainless steel, platinum-iridium alloy, PEEK and other polymer materials.

The internal anchor of the present invention can be any structural form of the internal anchor in the prior art, as long as it can be arranged on the right ventricular septum of the heart. However, in order to reduce the surgical risk of prethoracic opening after the implantation of the cardiac volume reduction device fails or the patient needs to remove the left ventricular volume reduction device at a later stage, FIGS. 3A to 3E of the present invention provide an exemplary recoverable inner anchor 20 . The main body of the retrievable inner anchor 20 is roughly in the shape of a cuboid and has two sides, one is the contact surface 21 and the other is the non-contact surface 22 . The contact surface 21 refers to the side that adheres to the right ventricular septum of the heart after implantation; the non-contact surface 22 refers to the side that will not adhere to the heart after implantation, that is, the side facing away from the contact surface 21 . The axial center of the inner anchor 20 has a guide wire lumen 213, which is used for the guide wire to pass through during the surgical delivery of the inner anchor. The wire can pass through, preferably a circular through hole. The side end of the inner anchor 20 can be any smooth curved surface shape, preferably a spherical end surface, which facilitates the smooth entry of the inner anchor 21 into the delivery sheath and reduces delivery resistance. The contact surface 21 may rest on the right ventricle septum. The contact surface 21 may have no tie rod grooves as in the prior art, and the tie rod 10 is in close contact with the contact surface 21 during the delivery of the inner anchor. In order to reduce the size of the delivery sheath, it is preferable that the contact surface 21 is provided with a tie rod groove 211 along the axial direction. During the delivery of the inner anchor, the tie rod 10 is accommodated in the tie rod groove 211, reducing the The volume of the inner anchor and the tie rod during the delivery process; at the same time, the tie rod groove 211 also limits the tie rod 10, and the tie rod 10 is bound in the tie rod groove 211 to regulate the movement of the tie rod 10 and avoid damage to the heart tissue. cause damage. The tie rod 10 can be pivoted in the middle of the contact surface 21, preferably in a non-detachable way, for example, in the middle of the contact surface 21, there are hinged parts 212 on both sides of the tie rod groove 211 and a cross tie rod groove. The slot 211 is used for the tie rod shaft 213 of the tie rod 10 to pass through. The two ends of the tie rod shaft 213 are respectively fixed in the middle of the hinge part 212. 213 cannot be removed from the hinge portion 212 , and the hinge hole 111 of the tie rod 10 is inserted through the tie rod shaft 213 on 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 of the non-contact surface 22 extends toward the middle of the non-contact surface 22 with a barb 221 substantially parallel to the non-contact surface 22 , which is convenient for the snare 91 to capture the inner anchor 20 . A better way is that the two opposite sides of the non-contact surface 22 respectively extend toward the middle of the non-contact surface 22 with barbs 221 that are substantially parallel to the non-contact surface 22, and having barbs on both sides is more conducive to the snare. 91 capture of inner anchor 20. Barbs 221 extend from both sides 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 beneficial to the snare 91 to drive the inner anchor 20 to withdraw. In the cavity of the I-shaped cross section, the resistance of withdrawing the inner anchor 20 is reduced. The barbs 221 can be in the shape of a long plate, but the shape of the barbs can be U-shaped, which reduces the endothelialization, attachment and growth of the inner anchor 20 in the body, and is beneficial to subsequent recovery. The space between the barbs 221 and the non-contact surface 22 forms a guide cavity 222 that provides a guide for the snare 91 . The retrievable inner anchor 20 is provided with a barb 221 on one side of the inner anchor that can be hooked by the snare 91, so that the inner anchor 20 can be pulled back from the delivery sheath to complete the recovery of the inner anchor 20, without the need for additional open-heart surgery. inner anchor. In the case where the two opposite sides of the non-contact surface 22 are extended with barbs 221, the two barbs 221 on the two opposite sides of the non-contact surface 22 are separated by a certain distance, that is, the two barbs 221 are not When docked, the spacing is such that the barb opening 223 can be captured into the guide cavity 222 for capturing the snare 91 . At this time, the guide cavity 222 extends from the barb opening 223 as the starting point along a straight line parallel to the non-contact surface 22 of the inner anchor. When the extension is about to reach but has not reached the side end of the inner anchor 20, the guide cavity is at this time. 222 begins to bend and extend toward the axial center of the inner anchor 20, and finally the guide cavity 222 ends at the axial center of the inner anchor 20, that is, the guide cavity 222 ends at the guide wire cavity 23 in the axial center. This arrangement can make the snare 91 hung in the guide cavity 222 be in the center of the inner anchor 20 when the inner anchor 20 is captured when the inner anchor is recovered. The central location of the anchor 20 facilitates entry of the inner anchor 20 into the delivery sheath. Moreover, the barb 221 has a guide protrusion 224 protruding from the guide cavity 222 near the end point of the guide cavity 222 for indicating the guide end point. When the snare 91 moves to this position, combined with the external imager, the capture of the inner anchor 20 by the snare is completed, and the corresponding operation of withdrawing the snare 91 can be performed. The inner anchor 20 of this example may be integrally formed as a whole. The inner anchor material can be made of one or a combination of metal materials with good biocompatibility and toughness, such as stainless steel, titanium, and nickel-titanium alloy. The contact surface of the inner anchor or the entire inner anchor can also be covered with polyester coating or surface coating treatment, so that the coating can buffer the contact between the inner anchor and the cardiac tissue, and at the same time can increase the speed of endothelialization and reduce the risk of injury. corresponding inflammatory response.

The external anchor of the present invention can be any external anchor in the prior art, and is used to exclude left ventricular scar structures. As shown in Figures 4A-4B, one of the external anchors, such as the external anchor 30, is generally in the shape of a flat cuboid and has an external anchor body 30a. The external anchor body also has two sides, a contact surface and a non-contact surface. The contact surface can abut against the outer wall of the left ventricle, and the non-contact surface is opposite to the contact surface. A central position of the outer anchor body 30a has a through lock hole (not shown in the figure), and the lock hole is used for passing the tie rod 10 therethrough. The outer anchor material can be made of one or more combination of metal materials with good biocompatibility and toughness such as stainless steel, titanium, nickel-titanium alloy, cobalt-chromium alloy, platinum-iridium alloy, etc. The entire outer anchor body is covered with a polyester coating or subjected to surface coating treatment, and the coating structure buffers the contact between the outer anchor and the cardiac tissue, and at the same time can increase the speed of endothelialization and reduce the corresponding inflammatory response.

In the present invention, in order to enhance the firmness of the outer anchor 30 being locked on the tie rod 10, a locking structure is provided on the non-contact surface of the locking hole of the outer anchor main body 30a. A structure in which the tie rods 10 are tightly locked to each other. The locking structure of the example of the present invention has at least a locking piece and a pressing piece, and preferably a reset piece, or a cam, and a casing. The structures of the locking piece, the pressing piece, the reset piece, and the housing can be varied, as long as the structure that can lock the locking piece on the tie rod is feasible. Extruded parts are also feasible, and the reset part can release the locking part from the tie rod, which is also feasible for the structure in which the locking part is released.

A locking structure exemplified in the present invention has a locking unit and a housing. The locking unit of the present invention may be a locking unit in the prior art, or may be a locking unit in the applicant's prior patent application, see the application CN2022104104038 and CN2022104103800, the patent application has a locking piece, a pressing piece, a pair of restoring pieces and a cam. The patent application of the present invention includes all the technical contents of the above patent application.

As shown in FIGS. 4A to 4F , the present invention also exemplifies a locking structure with a simple structure that is controlled in the same direction as the tie rod 10 . The locking structure can also be unlocked to recover the outer anchor and the inner anchor. The locking structure of this example The structure is also operated in the same direction as the tie rod 10, so it is very convenient to perform locking and unlocking operations. The locking structure of the present invention also has a locking unit, and the locking unit includes a locking piece that can press against the tie rod 10 , a pressing piece that can press the locking piece on the tie rod 10 , and a casing.

In this example, the locking member is a lock block 31, which is roughly in the shape of a square body, one side is set in the arc shape of the smooth cylindrical side surface, and the other three sides are still in the shape of a plane; The other side is the locking surface 311 that can squeeze the tie rod 10 . The locking surface 311 can be configured as a toothed surface (not shown), for example, so that the tie rod 10 can be engaged more firmly. The locking block 31 is provided with a positioning shaft 312 inside one side of the arc-shaped side surface, and both ends of the positioning shaft 312 are disposed on two opposite first shell walls of the casing. The locking block 31 can be rotated around the positioning shaft 312 to push the locking surface 311 to the surface of the tie rod 10 for squeeze locking. A transmission cavity 313 is hollowed out in the middle of the lock block 31 near one side.

In this example, the extrusion is the transmission rod 32 . One end of the transmission rod 32 is connected with a transmission shaft 321 . The transmission shaft 321 is parallel to the positioning shaft 312 , one end of the transmission rod 32 is located in the transmission cavity 313 , the transmission shaft 321 is arranged in the hollow transmission cavity 313 in the middle of the lock block 31 , and the two ends of the transmission shaft 321 pass through the transmission cavity 313 . In the opposite side wall, the lock block 31 is pushed and pulled by the transmission rod 32, and the lock block 31 is rotated with the positioning shaft 312 as the axis, so that the locking surface 311 of the lock block 31 is pushed toward the surface of the tie rod 10 to achieve locking, and vice versa, pull the transmission rod 32 to release the locking surface 311 of the lock block 31 from the surface of the tie rod 10 to unlock. Specifically, one end of the transmission rod 32 is a cylindrical rod 322 , and the transmission shaft 321 is provided on one end of the cylindrical rod 322 . The side surface of the other section of the cylindrical rod 322 is provided with a right-angled trapezoidal groove 324 , which is convenient for accommodating and rotating the lock block 31 . The bottom surface of one end of the cylindrical rod 322 is set as an arc surface in the form of a cylindrical side surface coaxial with the transmission shaft 321 , so that the cylindrical rod 322 can be accommodated and rotated in the transmission cavity 313 . The other end of the transmission rod 32 is a screw rod 323, one end of the screw rod 323 is screwed into the other end of the cylindrical rod 322, and the other end of the screw rod 323 is set in the transmission rod hole of the second shell wall of the casing.

In this example, the housing 33 is a square box body, and the housing 33 has a built-in locking unit. Two opposite first shell walls of the housing 33 respectively have positioning shaft support holes 331 , and both ends of the positioning shaft 312 of the lock block 31 are respectively fixed in the positioning shaft support holes 331 . A second shell wall of the housing 33 has a transmission rod hole 332 , and the other end of the screw 323 of the transmission rod 32 is inserted into the transmission rod hole 332 . Two opposite second shell walls of the housing 33 respectively have tie rod holes 333 at corresponding positions where the locking member locks the tie rod 10 . The tie rod hole 333 and the transmission hole 332 are on the same side wall, so it is convenient to operate locking and unlocking. The entire locking structure is fixedly connected to the locking hole at the center of the non-contact surface of the outer anchor body 30 by using the second shell wall on the side with the tie rod hole 333 but without the transmission hole 332 .

In this example, there is also a U-shaped limit slot 34 of the limit lock block 31, the limit slot 34 is fixed in the housing 33, and the shape of the limit slot 34 is roughly a U-shaped surrounded by two side plates and a bottom plate The slots on both sides of the limiting slot 34 are aligned with the tie rod holes 333 of the housing 33, so that the tie rod 10 can pass through. The other side of the locking block 31 having the locking surface 311 is limited in the U-shaped limiting groove 34 .

As shown in Figures 5A-5D, the implantation process of the left ventricular volume reduction device of the present invention is as follows:

Use the proximal needle segment 13 on the tie rod 10 or other puncture parts to complete the puncture of the left ventricular scar and the interventricular septum, enter the puncture sheath, establish a channel between the right ventricle and the epicardial area, and withdraw from the puncture sheath The dilator, enter the J-type guide wire 92 along the puncture sheath, use the snare 91 entering the delivery device to complete the capture of the J-type guide wire 92, keep the snare 91 tightly bound to the J-type guide wire 92, and withdraw The snare 91 pulls the J-shaped guide wire 92 into the inner cavity of the delivery device 90, and then out of the proximal end of the delivery device.

Adjust the puncture sheath so that the distal end of the puncture sheath enters the lumen of the distal end of the delivery device 90, insert the J-shaped guide wire 92 into the proximal needle segment 13 on the tie rod 10 outside the body, and enter the connection along the J-shaped guide wire 92 The anchor tie rod 10, keeping the J-shaped guide wire 92 still, pushes the tie rod 10, so that the proximal end of the tie rod enters the lumen of the delivery device 90, the lumen of the distal end of the puncture sheath, the distal end of the delivery device 90, the right ventricle, Left ventricle, epicardial region. When the proximal end of the tie rod 10 exits the epicardium, the J-shaped guide wire 92 can be withdrawn, and the entry of the inner anchor 20 can be completed by pulling the tie rod 10 .

Confirm the position of the inner anchor 20 by fluoroscopy. When the inner anchor 20 is close to the right ventricular septum, withdraw the distal end of the puncture sheath to the left ventricle, and withdraw the delivery device 90 at the same time, so that the inner anchor 20 is in the right ventricular septum. position is released.

Cut the square connection section 11 at the connection between the square connection section 11 and the guide section 12, adjust the locking structure of the outer anchor 30 to make it in a released state, and enter the outer anchor 30 along the square connection section 11 to ensure that the contact surface of the outer anchor 30 is in contact with the outer anchor. Scar tissue contact in the membranous area.

Shorten the distance between the inner anchor and the outer anchor, while maintaining the proper compression force of the heart, neither too large nor too small, the optimal force is 1-6N, operate the external locking and release parts, lock the locking structure, and cut off the excess square connection section 11. Complete the implantation of the left ventricular volume reduction device. Combined with the anatomical structure and actual needs of the patient's heart, by repeating the above steps, multiple pairs of anchors can be implanted, generally 2 to 4 pairs.

When the operation fails or the patient needs to remove the left ventricular volume reduction device, enter the delivery device 90 along the right jugular vein, withdraw the dilator in the delivery device 90, enter the snare 91 along the delivery device 90, and use the imaging device Use the snare to capture the barb opening 223 on the inner anchor 20, smoothly capture the barb 221 of the inner anchor 20, and tighten the snare 91. When the snare 91 touches the guide bump 224, the imager indicates that the snare is completed. For the capture of the inner anchor, the outer anchor 30 is used to release the locking of the tie rod 10 by the external lock release member, and the tight state of the inner anchor 20 is maintained by the snare, and the inner anchor 20 enters the delivery device 90 while withdrawing the snare. After exiting the delivery device 90, the interventional retrieval of the inner anchor 20 can be completed.

The left ventricular volume reduction device provided by the present invention uses a surgical minimally invasive incision in the left chest and intervention of the right internal jugular vein as the surgical approach, and uses a guide wire to shuttle back and forth in the heart to "lay a track" when the heart is not beating Then, like tightening the pockets, place the two anchors on the edge of the aneurysm precisely, pinching the left and the right, the inside and the outside, and both sides, so that the aneurysm is folded and clamped, and the left ventricular scar and the right The ventricles are folded together, serial anchors are embedded in the ventricle wall, excess scar tissue is sutured to help the heart return to its previous shape and function, the patient's left ventricle is reshaped to a near-normal shape and size, remodeling the ventricle to help improve heart function , patient symptoms and quality of life. The left ventricular volume reduction device of the present invention has the function of retrievable intervention, which avoids open-heart surgery when the patient needs to remove the left ventricular volume reduction device during the operation or after the operation. secondary injury and reduce the financial burden on patients and their families.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (12)

1. A locking structure for a left ventricular volume reduction device, characterized in that the locking structure has a locking unit, and the locking unit has: a locking piece that can be pressed against the tie rod, and the locking piece is a lock block; A pressing piece that can compress the locking piece on the tie rod, the pressing piece is a transmission rod, one end of the transmission rod is connected with a transmission shaft, and both ends of the transmission shaft pass through the The two opposite side ends of the middle part of the lock block are locked and unlocked by pushing and pulling the lock block through a transmission rod. 2. The locking structure for a left ventricular volume reduction device according to claim 1, wherein, One side of the lock block is provided with a positioning shaft, and the positioning shaft is parallel to the transmission shaft. The other side is pressed against the surface of the tie rod to achieve locking. 3. The locking structure for a left ventricular volume reduction device according to claim 2, characterized in that the locking structure further has a casing, and the casing is built with the locking unit: Two opposite first shell walls of the outer casing are respectively provided with positioning shaft support holes, and both ends of the positioning shaft are respectively fixed in the positioning shaft support holes; A second shell wall of the casing is provided with a transmission rod hole, and the other end of the transmission rod is penetrated in the transmission rod hole. 4. The locking structure for a left ventricular volume reducing device according to claim 1, wherein The middle of the lock block has a hollow transmission cavity, one end of the transmission rod is located in the transmission cavity, and the two ends of the transmission shaft at one end of the transmission rod pass through the two opposite sides of the transmission cavity of the lock block. inside the side wall. 5. The locking structure for a left ventricular volume reducing device according to claim 1, wherein One end of the transmission rod is a cylindrical rod, and the transmission shaft is arranged on one end of the cylindrical rod; The other end of the transmission rod is a screw rod, one end of the screw rod is screwed into the other end of the cylindrical rod, and the other end of the screw rod is arranged in the transmission rod hole of the second shell wall of the casing. 6. The locking structure for a left ventricular volume reducing device according to claim 5, wherein The side surface of the other section of the cylindrical rod is provided with a right-angled trapezoid groove. 7. The locking structure for a left ventricular volume reducing device according to claim 5, wherein The bottom surface of one end of the cylindrical rod is set as an arc surface in the form of a cylindrical side surface coaxial with the transmission shaft. 8. The locking structure for a left ventricular volume reducing device according to claim 3, wherein The locking unit has a U-shaped limiting groove for limiting the locking block, which is fixed in the housing, and the other side of the locking block is limited to be located in the U-shaped limiting groove. 9 . The locking structure for a left ventricular volume reduction device according to claim 3 , wherein the two opposite second walls of the outer casing, that is, the same wall as the transmission rod hole, are on the locking member. 10 . Corresponding positions for locking the tie rods are respectively provided with tie rod holes. 10. An external anchor for a left ventricular volume reduction device, having: an outer anchor body in the shape of a flat cuboid; A locking structure, characterized in that: the locking structure is the locking structure for a left ventricular volume reduction device according to any one of claims 1 to 9, and the locking structure is fixedly arranged on one side of the outer anchor body the center position. 11. The outer anchor for a left ventricular volume reduction device according to claim 10, wherein the outer anchor body has: a contact surface against the outer wall of the left ventricle; and A non-contact surface is opposite to the contact surface, and the locking structure is fixed at the center of the non-contact surface. 12 . The external anchor for the left ventricular volume reduction device according to claim 11 , wherein the central position of the external anchor main body has a through locking hole, and the locking hole is used for passing the tie rod, 12 . The second shell wall of the outer shell of the locking structure is fixed at the position of the locking hole of the outer anchor body.

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