Internal anchor delivery device

Abstract

The present invention discloses an internal anchor delivery device, comprising: a delivery wire having a distal end that can be inserted into the internal anchor; a delivery sheath tube, in which the delivery wire is inserted; a handle shell, in which the proximal end of the delivery sheath tube is fixed to the distal end of the handle shell; and a push tube, in which the proximal end of the delivery wire is fixed, and the push tube can be inserted into the handle shell movably along the axial direction. In addition to the delivery sheath tube and the delivery wire, the internal anchor delivery device of the present invention only has a circular handle shell, a push tube and a transition conical tube. The structure is very simple, and they are all circular tubular objects with low cost. The internal anchor delivery device of the present invention reduces bleeding by adding a drain valve and introducing physiological saline. By directly removing the tail cover on the push tube protruding from the proximal end of the handle shell, the delivery wire can be quickly pulled out to release the internal anchor.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to an internal anchor delivery device. Background Art

[0002] Left ventricular aneurysm (LVA) is a common complication of myocardial infarction. It occurs when a coronary artery blockage causes ischemia and necrosis of part of the ventricular myocardium. The necrotic ventricular myocardium loses its contractile function, and during heart contraction, this necrotic area bulges outward, forming an aneurysm, also known as scar tissue. Due to compensatory effects, the heart continues to enlarge, leading to heart failure and pulmonary congestion.

[0003] Left ventricular volume reduction is a ventricular enhancement method that can be used to address scar tissue issues in patients with ischemic cardiomyopathy after myocardial infarction. The left ventricular volume reduction device delivers multiple pairs of anchors (internal and external anchors) into the body. They can clamp the left ventricle and allow other surgical instruments to enter the heart through a small incision on the surface of the body. This minimally invasive system can also be used in traditional open-chest surgery to achieve ventricular repair. The internal anchor delivery devices of the ventricular volume reduction devices currently on the market generally have very complex structures. During the operation, there will be a lot of blood loss. The internal anchor's tie rod is supported by an integral PEEK, the processing product is high, and the tie rod guide part has poor compliance, which is not convenient for operation. Summary of the Invention

[0004] The present invention aims to solve the technical problem of complex structure of the internal anchor conveying device in the prior art and aims to provide a conveying device with a simple structure.

[0005] The inner anchor conveying device of the present invention has:

[0006] a delivery wire having a distal end threadable within the inner anchor;

[0007] a delivery sheath tube, in which the delivery wire is passed through;

[0008] a handle shell, wherein the proximal end of the delivery sheath is fixed to the distal end of the handle shell;

[0009] A push tube, the proximal end of the delivery wire is fixed in the push tube, and the push tube is movably arranged in the handle shell along the axial direction.

[0010] Preferably, the distal section of the delivery sheath has an anchor groove capable of accommodating the inner anchor; the distal end of the delivery sheath also has a safety seal.

[0011] Preferably,

[0012] The handle shell is provided with an axially arranged through hole;

[0013] An axially arranged push block is fixedly provided on the outside of the push tube. The push block is located in the through hole of the handle shell and can slide axially along the through hole.

[0014] Preferably, the push tube has:

[0015] a push tube body;

[0016] A tail cover is connected to the proximal end of the push tube body. The proximal end of the delivery wire is passed through the push tube body and fixed to the tail cover by a pin.

[0017] Preferably, the proximal section of the push tube protrudes from the proximal end of the handle shell.

[0018] Preferably, the distal end of the push tube body has a position-limiting support ring, and the delivery wire passes through the position-limiting support ring.

[0019] Preferably, the inner anchor delivery device further comprises:

[0020] A transition conical tube, the proximal end of the transition conical tube is connected to the distal end of the handle shell, the distal end of the transition conical tube is fixedly connected to the proximal end of the delivery sheath tube, and the proximal end of the delivery sheath tube is fixed to the distal end of the handle shell by means of the transition conical tube.

[0021] Preferably, a stress tube is inserted into the distal end of the transition tapered tube, and the distal end of the transition tapered tube is fixedly connected to the proximal end of the delivery sheath tube by means of the stress tube.

[0022] Preferably, an isolation pad is provided in the proximal end of the transition tapered tube, a sealing pad is provided on one side of the isolation pad, and the delivery wire passes through the isolation pad and the sealing pad.

[0023] Preferably, the inner anchor has:

[0024] an inner anchor body, the inner anchor body having a contact surface against the left ventricular side wall and a non-contact surface facing away from the contact surface;

[0025] a wire hole extending through the inner anchor body along a length direction of the inner anchor body;

[0026] A hinged end is arranged at the middle position of the non-contact surface.

[0027] Preferably, the inner anchor delivery device further comprises:

[0028] A tie rod has a proximal end hinged to the hinged end of the inner anchor.

[0029] Preferably, the inner anchor delivery device has:

[0030] A drain valve is integrally connected to the interior of the transition tapered tube via a TUP tube.

[0031] Preferably, the drain valve has:

[0032] a valve seat having a passage therein;

[0033] A directional connector and a first Luer connector are integrally extended from both sides of the valve seat, respectively, the directional connector and the first Luer connector each having a connector channel therein, and the directional connector is connected to the TUP tube;

[0034] in,

[0035] There is a transition channel on each side of the valve seat.

[0036] One end of the transition passage is in unobstructed communication with the seat passage;

[0037] The other end of the transition channel is in unobstructed communication with the joint channel.

[0038] Preferably, the inner diameter of one end of the transition channel is consistent with the inner diameter of the seat channel.

[0039] Preferably, the inner diameter of the other end of the transition channel is consistent with the inner diameter of the joint channel.

[0040] Preferably, the inner diameter of the transition channel increases gradually and continuously from one end to the other end, and the angle α formed by the side of the transition channel and the axis is between 5° and 12°.

[0041] Preferably,

[0042] The valve seat has a core hole perpendicular to the seat channel;

[0043] The exhaust valve further comprises a valve core which is rotatably arranged in the core hole and has a core channel which is linearly and unobstructedly connected to the seat channel.

[0044] Preferably, the drain valve further comprises:

[0045] A movable joint has one end vertically arranged on the valve seat, and the interior of the movable joint is provided with a movable channel which can be communicated with the seat channel.

[0046] Preferably, the movable joint has a sealing nut.

[0047] Preferably, the ratio of the inner diameter of the seat channel to the inner diameter of the joint channel is 0.5 to 1:1.

[0048] The conveying wire of the present invention is, for example, a steel wire.

[0049] The positive progress effect of the present invention is:

[0050] 1) The inner anchor delivery device of the present invention consists of only a circular handle shell, a push tube, and a transition tapered tube, in addition to the delivery sheath and delivery wire. The structure is very simple, consisting of circular tubular objects, and the cost is low.

[0051] 2) The internal anchor delivery device of the present invention reduces bleeding by adding an emptying valve and introducing physiological saline.

[0052] 3) The present invention uses a push block on the push tube protruding from the proximal end of the handle shell. Through the movement of the push block, the delivery wire can be quickly pushed and pulled to control the implantation of the internal anchor. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figures 1A to 1C It is a structural schematic diagram of the inner anchor conveying device of the present invention;

[0054] Figure 2A It is a schematic structural diagram of the inner anchor and tie rod of the present invention;

[0055] Figure 2B Schematic diagram of the structure of the tie rod of the present invention;

[0056] Figures 2C-2D This is a schematic diagram of the structure of the inner anchor and tie rod on the delivery sheath of the present invention;

[0057] Figure 3 It is a structural schematic diagram of the push tube of the present invention;

[0058] Figures 4A-4B It is a structural schematic diagram of the drain valve of the present invention. DETAILED DESCRIPTION

[0059] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0060] In the field of interventional medical devices, "distal" and "proximal" are defined as the end away from the operator during surgery, and "proximal" and "distal" are defined as the end close to the operator during surgery.

[0061] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0062] like Figures 1A to 1C As shown, the inner anchor delivery device of the present invention comprises a delivery wire 10, a delivery sheath 20, a transition tapered tube 30, a handle shell 40, a push tube 50 and an exhaust valve 60. In another preferred example, the inner anchor delivery device may further comprise an inner anchor 70 to be delivered and a tie rod 80.

[0063] like Figure 2A As shown, in this example, the minimally invasive interventional medical device to be delivered is an internal anchor 70 on a left ventricular volume reduction device. The internal anchor 70 is roughly a flat rectangular parallelepiped that can rest against the left ventricular septum and, in conjunction with the external anchor resting against the outer wall of the left ventricle, compress the left ventricle to reduce its volume, thereby achieving volume reduction. The internal anchor 70 comprises an internal anchor body 71 having a contact surface that rests against the left ventricular septum and a non-contact surface facing away from the contact surface. A wire hole 72 extends through the internal anchor body 71 along its length; a hinged end 73 is located in the middle of the non-contact surface. The proximal end of the tie rod 80 is hinged to the hinged end 73 on the non-contact surface of the internal anchor body 71 via the hinged hole.

[0064] like Figure 2B As shown, tie rod 80 is used to puncture the left ventricular septum and the outer wall of the left ventricle. Tie rod 80 acts as a bridge, spanning the entire left ventricle. One end of tie rod 80 is connected to internal anchor 70, allowing it to rest against the left ventricular septum. After spanning the left ventricle, the other end of tie rod 80 is connected to the external anchor, which compresses the outer wall of the left ventricle, reducing the volume of the left ventricle. Once the left ventricle reaches the desired volume, the external anchor is locked to tie rod 80, and the excess tie rod is trimmed, completing the left ventricular volume reduction procedure. In this example, tie rod 80 has a square connecting segment 81, to which the internal and external anchors 70 are attached. Tie rod 80 also has a circular segment 82, which contains a guidewire passage. Near square connecting segment 81, circular segment 82 has a guide hole 83 for the insertion of a guidewire. Circular segment 82 is primarily intended for delivery, requiring a certain length and providing a guidewire passage.

[0065] In this example, the delivery wire 10 is a thin and long steel wire or steel cable, which serves as a delivery component for delivering the inner anchor 70. The delivery wire 10 has a distal end, which is inserted into the wire hole 72 on the contact surface of the inner anchor 70.

[0066] like Figures 2C-2D As shown, in this example, the delivery sheath 20 is a hollow, elongated tube with a delivery wire 10 inserted therein. The distal end of the delivery sheath 20 has an anchor groove 21 that can accommodate an inner anchor 70. The shape of the anchor groove 21 matches the shape of the inner anchor 70, and the inner anchor 70 can be clamped in the anchor groove 21. This shape matching allows the inner anchor 70 and the delivery sheath 20 to be more effectively integrated, reducing the overall volume during delivery and facilitating delivery. The distal end of the delivery sheath 20 also has a safety cap 22, which is mounted on the distal end of the delivery sheath 20. During delivery, the sharp distal end of the delivery sheath 20 is prevented from causing secondary damage to the human body.

[0067] like Figures 1B to 1C As shown, in this example, the handle housing 40 is a circular, hollow tube that facilitates gripping during delivery. The handle housing 40 has an axial through-hole 41. The proximal end of the delivery wire 10 is inserted into the handle housing 40. The distal end of the handle housing 40 can be indirectly connected to the proximal end of the delivery sheath 20. For details on the indirect connection, refer to the structure of the transition tapered tube 30.

[0068] like Figures 1B to 1C and Figure 3 As shown, in this example, the main body of the push tube 50 is also a circular tube, namely the push tube body 51, but the outer diameter of the push tube body 51 is slightly smaller than the inner diameter of the handle shell 40. Therefore, the distal end of the push tube 50 can be inserted into the proximal end of the handle shell 40 and can move freely axially along the handle shell 40. The proximal end of the push tube 50 protrudes from the proximal end of the handle shell 40. A push block 52 is axially fixed on the outer wall of the distal end of the push tube body 51, for example, it is fixed to the outer wall of the push tube body 51 with screws, or it can be integrally formed on the outer wall of the push tube body 51, or other connection methods are feasible. The push block 52 is located in the through hole 41 of the handle shell 40, so the push block 51 can be pushed axially along the through hole 41. The push block 51 can thus push the push tube 50 to the distal end in the handle shell 40. The proximal end of the conveying wire 10 extends all the way through the push tube 50 and is fixed to the proximal end of the push tube 50. The push tube 50 has a tail cap 53 connected to the proximal end of the push tube body 51. The tail cap 53 can be connected to the proximal end of the push tube body 51 in a variety of ways, such as by threading, bonding, or welding. The proximal end of the delivery wire 10 is inserted into the push tube body 51 and secured to the tail cap 53 by a pin, such as a screw (not shown). The distal end of the push tube body 51 has a limiting support ring 511, through which the delivery wire 10 passes, providing substantial support.

[0069] Continue as Figures 1B to 1C As shown, in this example, the internal anchor delivery device further comprises a transition tapered tube 30, which is hollow and has a delivery wire 10 passing through it. The transition tapered tube 30 is generally conical in shape, with a small cylindrical tube section at each of the distal and proximal ends. The distal cylindrical tube section is thinner; the proximal cylindrical tube section is thicker, consistent with the inner and outer diameters of the handle shell. The proximal end of the transition tapered tube 30 is connected to the distal end of the handle shell 40 via the thicker proximal cylindrical tube section, for example, by inserting and plugging, threading, welding, or bonding. An isolation pad 32 is provided at the connection between the proximal end of the transition tapered tube 30 and the distal end of the handle shell 40. A sealing gasket (not shown) is provided on one side of the isolation pad 32, which is the same shape and size as the isolation pad 32 and is arranged side by side. The delivery wire 10 passes through the isolation pad 32 and the sealing gasket. The arrangement of the isolation pad 32 and the sealing gasket isolates the interior of the delivery device from the outside world. A stress tube 31 is inserted into the small cylindrical section at the distal end of the transition tapered tube 30. The proximal end of the delivery sheath 20 is fixedly connected within the stress tube 31, thereby securely connecting the distal end of the transition tapered tube 30 to the proximal end of the delivery sheath 20. The provision of the stress tube 31 reduces bending at the proximal end of the delivery sheath 20. In this manner, the proximal end of the delivery sheath 20 is indirectly connected to the distal end of the handle housing 40 via the transition tapered tube 30.

[0070] like Figures 4A-4B As shown, in this example, the internal anchor delivery device also includes an exhaust valve 60, which communicates with the interior of the transition tapered tube 30 via a TUP tube 670. The exhaust valve can be a two-way, three-way, or four-way valve. This example uses a three-way valve as an example. The three-way valve body includes a valve seat 620, which defines a seat channel 621 within the valve seat 620. For example, the seat channel is dimensioned between 2.7 and 3.6 mm. The valve seat 620 has a core hole perpendicular to the seat channel 621. Similar to conventional valve cores, a valve core 630 is rotatably inserted within the core hole. The valve core 630 includes a core channel that is linearly and unobstructedly connected to the seat channel 621. For example, the core channel and the seat channel 621 have the same inner diameter, thereby ensuring unimpeded fluid flow. When the valve core 630 is rotated clockwise, for example, by 90°, the core channel of the valve core 630 seamlessly connects with the seat channel 621, allowing fluid to flow smoothly through the three-way valve. When the valve core 630 is rotated counterclockwise, for example, by 90°, the core channel of the valve core 630 and the seat channel 621 are completely offset, and flow is impossible, thereby closing the three-way valve.

[0071] In this example, a directional connector 640 and a first Luer connector 650 are respectively provided on either side of the three-way valve body. The directional connector 640 can be connected to a TUP tube 670. The directional connector 640 integrally extends from one side of the valve seat 620 and has a connector channel 641 within it. The first Luer connector 650 integrally extends from the other side of the valve seat 620 and has a connector channel 651 within it. The inner diameter of the seat channel 621:the inner diameter of the connector channel 641 and 651 are in a ratio of 0.5 to 1:1. Transition channels 623a and 623b are respectively provided on one and the other sides of the valve seat 620. The inner diameter of one end of the transition channels 623a, 623b is consistent with the inner diameter of the seat channel 621, and the inner diameter of the other end of the transition channels 623a, 623b is consistent with the inner diameter of the joint channels 641, 651, so that one end of the transition channels 623a, 623b is connected to the seat channel 621 without obstruction; the other end of the transition channels 623a, 623b is connected to the joint channels 641, 651 without obstruction, and the inner diameter of the transition channels 623a, 623b gradually and continuously increases from one end to the other. For example, the angle α formed by the side of the transition channels 623a, 623b and the axial centerline is between 5 and 12°. Therefore, a straight-line connecting channel without flow obstacles is formed between the entire seat channel 621, the transition channels 623a, 623b and the joint channels 641, 651, so that the fluid can flow smoothly in the entire channel without resistance, reducing the possibility of congestion.

[0072] The three-way connecting valve has a second Luer connector 660, which is vertically arranged on the pipeline of the directional connector 640; the inner surface of the directional connector 640 has a bayonet, and the TUP tube 670 is connected to the bayonet. The inner diameter of the connector channel 641 of the directional connector 640 is consistent with the inner diameter of the TUP tube 670. When the inner diameters are consistent, unobstructed flow is also formed here.

[0073] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An internal anchor conveying device, characterized in that have: An inner anchor, the inner anchor being generally in the shape of a flat rectangular parallelepiped, comprising: an inner anchor body having a contact surface for abutting the left ventricular septum and a non-contact surface facing away from the contact surface; a wire hole extending through the inner anchor body along its length; and a hinged end disposed in the middle of the non-contact surface; a delivery wire having a distal end that is threadable through a wire hole in the inner anchor; a delivery sheath tube, in which the delivery wire is passed through; a handle shell, wherein the proximal end of the delivery sheath is fixed to the distal end of the handle shell; a push tube, in which the proximal end of the delivery wire is fixed, and the push tube is axially movable and passes through the handle housing; a tie rod, the proximal end of which is hinged to the hinge end of the non-contact surface of the inner anchor body through a hinge hole, and the other end of which is connected to the outer anchor; The distal section of the delivery sheath has an anchor groove capable of accommodating the inner anchor along the length direction of the inner anchor. The shape of the anchor groove matches the shape of the inner anchor, and the inner anchor is clamped in the anchor groove.

2. The inner anchor delivery device according to claim 1, characterized in that The distal end of the delivery sheath is provided with a safety seal.

3. The inner anchor delivery device according to claim 1, characterized in that The handle shell is provided with an axially arranged through hole; An axially arranged push block is fixedly provided on the outside of the push tube. The push block is located in the through hole of the handle shell and can slide axially along the through hole.

4. The inner anchor delivery device according to claim 1, characterized in that The push tube has: a push tube body; A tail cover is connected to the proximal end of the push tube body. The proximal end of the delivery wire is passed through the push tube body and fixed to the tail cover by a pin.

5. The inner anchor delivery device according to claim 1, characterized in that The proximal section of the pushing tube protrudes from the proximal end of the handle shell.

6. The inner anchor delivery device according to claim 4, characterized in that The distal end of the push tube body is provided with a position-limiting support ring, and the delivery wire passes through the position-limiting support ring.

7. The inner anchor delivery device according to claim 1, characterized in that The inner anchor delivery device also has: A transition conical tube, the proximal end of the transition conical tube is connected to the distal end of the handle shell, the distal end of the transition conical tube is fixedly connected to the proximal end of the delivery sheath tube, and the proximal end of the delivery sheath tube is fixed to the distal end of the handle shell by means of the transition conical tube.

8. The inner anchor delivery device according to claim 7, characterized in that A stress tube is inserted into the distal end of the transition tapered tube, and the distal end of the transition tapered tube is fixedly connected to the proximal end of the delivery sheath tube via the stress tube.

9. The inner anchor delivery device according to claim 7, characterized in that An isolation pad is provided in the proximal end of the transition tapered tube, a sealing pad is provided on one side of the isolation pad, and the delivery wire passes through the isolation pad and the sealing pad.

10. The inner anchor delivery device according to claim 7, characterized in that The inner anchor conveying device comprises: A drain valve is integrally connected to the interior of the transition tapered tube via a TUP tube.

11. The internal anchor delivery device according to claim 10, characterized in that The drain valve has: a valve seat having a passage therein; A directional connector and a first Luer connector are integrally extended from both sides of the valve seat, each having a connector channel therein, and the directional connector is connected to the TUP tube; in, There is a transition channel on each side of the valve seat. One end of the transition passage is in unobstructed communication with the seat passage; The other end of the transition channel is in unobstructed communication with the joint channel.

12. The inner anchor delivery device according to claim 11, characterized in that: The inner diameter of one end of the transition channel is consistent with the inner diameter of the seat channel.

13. The inner anchor delivery device according to claim 11, characterized in that: The inner diameter of the other end of the transition channel is consistent with the inner diameter of the joint channel.

14. The inner anchor delivery device according to claim 11, characterized in that: The inner diameter of the transition channel increases gradually and continuously from one end to the other end, and the angle α formed by the side of the transition channel and the axis is between 5° and 12°.

15. The inner anchor delivery device according to claim 11, characterized in that: The valve seat has a core hole perpendicular to the seat channel; The exhaust valve further comprises a valve core which is rotatably arranged in the core hole and has a core channel which is linearly and unobstructedly connected to the seat channel.

16. The internal anchor delivery device according to claim 11, characterized in that The drain valve also has: A movable joint has one end vertically arranged on the valve seat, and the interior of the movable joint is provided with a movable channel which can communicate with the seat channel.

17. The internal anchor delivery device according to claim 16, characterized in that The movable joint is provided with a closing nut.

18. The internal anchor delivery device according to claim 11, characterized in that The ratio of the inner diameter of the seat channel to the inner diameter of the joint channel is 0.5-1:1.

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