A delivery device for transcatheter aortic valve implantation

Abstract

A delivery device for transcatheter aortic valve implantation comprises an introduction sheath portion and a guide wire portion; the guide wire portion comprises a guide wire, one end of which is formed with a ball; the introduction sheath portion comprises a cylinder, one end face of the cylinder is coaxially fixedly connected with a ring, the inner diameter of the ring is equal to the inner diameter of the cylinder, and the diameter of the ball is smaller than the inner diameter of the cylinder; a plurality of mounting grooves are provided on the inner wall of the ring at equal intervals along the circumferential direction, and a fixing assembly is installed in the mounting groove; the fixing assembly comprises a support shaft fixedly connected in the mounting groove, the support shaft is perpendicular to the axis of the ring, a rotating rod is rotatably installed on the support shaft, and one end of the rotating rod close to the cylinder is fixedly connected to the bottom of the mounting groove by a spring; a through hole is provided at the bottom of the mounting groove and at a position corresponding to the end of the rotating rod away from the cylinder, and a slider is slidably arranged in the through hole; the utility model will not damage the inner wall of the arterial blood vessel, thereby improving the safety of the operation. In addition, the guide wire can be fixedly connected to the introduction sheath, thereby improving the stability of the guide wire and ensuring the efficiency of the operation.

Description

Technical Field

[0001] The utility model relates to the technical field of medical surgical tools, in particular to a conveying device for transcatheter aortic valve implantation. Background Art

[0002] When there are serious problems with the heart's aortic valve, your doctor may recommend a transcatheter aortic valve implantation (TAVI). The aortic valve is one of four valves in the heart. It sits between the left ventricle (lower left heart chamber) and the large blood vessel (aorta) that carries oxygen-rich blood to the body. With each heartbeat, the left ventricle contracts, pushing blood out through the three soft, cup-shaped leaflets that make up the aortic valve. When the left ventricle relaxes, the aortic valve closes, preventing blood from flowing back into the left ventricle. As you age, calcium deposits may build up in the aortic valve, causing the leaflets to become thicker and less flexible. In this case, the leaflets may not open fully. This condition is called calcific aortic stenosis, which causes the valve opening to narrow, reducing the amount of blood flowing into the aorta and out of the body. As a result, the wall of the left ventricle thickens to pump more blood out.

[0003] At the beginning of the operation, the doctor will make a small incision in the groin and create an opening in a blood vessel called the femoral artery. The doctor will then insert a soft tube, called an introducer sheath, through which the doctor will insert a soft guide wire into the femoral artery. The guide wire will go up along the femoral artery until it reaches the aorta. The guide wire will then pass through the opening of the aortic valve and into the left ventricle. Next, the doctor can use the guide wire to deliver surgical instruments to the aortic valve for surgery. The introducer sheath and guide wire are the delivery devices.

[0004] In existing delivery devices, the end of the guide wire that enters the body is relatively sharp, and the arteries are winding. When the guide wire shuttles through the arteries, it may scratch the inner wall of the artery. In addition, after the guide wire enters the body, the guide wire cannot be effectively fixed, causing the position of the guide wire end to change, affecting the efficiency of the operation. Utility Model Content

[0005] The utility model aims to provide a delivery device for transcatheter aortic valve implantation to solve the problems existing in the above-mentioned prior art.

[0006] A delivery device for transcatheter aortic valve implantation, comprising an introduction sheath portion and a guidewire portion; the guidewire portion comprises a guidewire, one end of which is formed with a ball; the introduction sheath portion comprises a cylinder, one end surface of the cylinder is coaxially fixedly connected with a ring, the inner diameter of the ring is equal to the inner diameter of the cylinder, and the diameter of the ball is smaller than the inner diameter of the cylinder; a plurality of installation grooves are formed at equal intervals along the circumferential direction on the inner wall of the ring, and a fixing assembly is installed in the installation groove;

[0007] The fixing assembly includes a supporting shaft fixedly connected between two opposite groove walls of the mounting groove, the supporting shaft is perpendicular to the axis of the circular ring, a rotating rod is rotatably mounted on the supporting shaft, and an end of the rotating rod close to the cylinder is fixedly connected to the bottom of the mounting groove through a spring; a through hole is provided at a position corresponding to the bottom of the mounting groove and the end of the rotating rod away from the cylinder, and a slider is slidably arranged in the through hole.

[0008] Preferably, an annular baffle is fixedly connected to one end of the outer wall of the cylinder close to the ring.

[0009] Preferably, an extrusion block is fixedly connected to one end of the rotating rod close to the middle of the ring and close to the cylinder.

[0010] Preferably, a slide plate is fixedly connected to one end of the sliding block close to the rotating rod.

[0011] The utility model discloses the following technical effects:

[0012] The utility model will not harm the inner wall of the arterial blood vessel, thereby improving the safety of the operation. In addition, the guide wire can be fixedly connected with the introduction sheath, thereby improving the stability of the guide wire and ensuring the efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0014] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the utility model in another state;

[0016] Figure 3 It is a schematic diagram of the internal structure of the circular ring of the utility model.

[0017] in:

[0018] 1. Guide wire; 2. Ball; 3. Cylinder; 4. Ring; 5. Mounting groove; 6. Support shaft; 7. Rotating rod; 8. Spring; 9. Through hole; 10. Slider; 11. Annular baffle; 12. Extrusion block; 13. Slide plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] See attached Figure 1-3 A delivery device for transcatheter aortic valve implantation, comprising an introduction sheath portion and a guidewire portion; the guidewire portion comprises a guidewire 1, one end of which is formed with a ball 2; the introduction sheath portion comprises a cylinder 3, one end face of the cylinder 3 is coaxially fixedly connected with a ring 4, the inner diameter of the ring 4 is equal to the inner diameter of the cylinder 3, and the diameter of the ball 2 is smaller than the inner diameter of the cylinder 3; a plurality of mounting grooves 5 are formed at equal intervals along the circumferential direction on the inner wall of the ring 4, and a fixing component is installed in the mounting groove 5;

[0022] The fixing assembly includes a support shaft 6 fixedly connected between two opposite groove walls of the mounting groove 5, the support shaft 6 is perpendicular to the axis of the ring 4, a rotating rod 7 is rotatably mounted on the support shaft 6, and the end of the rotating rod 7 close to the cylinder 3 is fixedly connected to the bottom of the mounting groove 5 through a spring 8; a through hole 9 is opened at a position corresponding to the bottom of the mounting groove 5 and the end of the rotating rod 7 away from the cylinder 3, and a slider 10 is slidably arranged in the through hole 9.

[0023] The ball 2 and the guide wire 1 are made of the same material and are integrally formed. One end of the ball 2 is used to extend into the patient's arterial blood vessel. The ball 2 can increase the contact area with the inner wall of the arterial blood vessel. In this way, when the guide wire 1 shuttles through the arterial blood vessel, it will reduce the damage to the arterial blood vessel and effectively protect the patient; the ball 2 can smoothly pass through the cylinder 3 and the ring 4, and the outer diameter of the ring 4 is larger than the outer diameter of the cylinder 3; the number of mounting grooves 5 is even and the center is symmetrically opened, the support shaft 6 is perpendicular to the two opposite groove walls connected to it, and the axis of the rotating rod 7 and the ring 4 are in the same plane; in a natural state, the end of the rotating rod 7 close to the cylinder 3 will move toward the middle of the ring 4 under the push of the spring 8, and the other end will move toward the direction of the slider 10. In this way, when the guide wire 1 is inserted into the cylinder 3 and the ring 4, the symmetrical The two rotating rods 7 will clamp the guide wire 1, and when the guide wire 1 slides outward, the end of the rotating rod 7 close to the cylinder 3 will continue to move toward the middle of the ring 4 under the action of friction. As a result, the two symmetrical rotating rods 7 will clamp the guide wire 1 more tightly to form a self-locking structure. Therefore, the present application can effectively prevent the guide wire 1 from moving; when you want to pull out the guide wire 1, squeeze the slider 10 by hand, and the slider 10 will slide into the ring 4. During this process, the slider 10 will push the end of the rotating rod 7 away from the cylinder 3 to rotate toward the middle of the ring 4. In this way, the end of the rotating rod 7 close to the cylinder 3 will leave the guide wire 1, and the guide wire 1 is no longer constrained, so that the guide wire 1 can be pulled out of the patient's body; when the rotating rod 7 rotates to be parallel to the ring 4, the rotating rod 7 will completely enter the mounting groove 5.

[0024] According to a further optimized solution, an annular baffle 11 is fixedly connected to one end of the outer wall of the cylinder 3 close to the ring 4 .

[0025] The annular baffle 11 can limit the depth of the cylinder 3 inserted into the patient's artery. When the cylinder 3 is inserted into the patient's artery to a certain length, the annular baffle 11 will contact the human skin, thereby preventing the cylinder 3 from being further inserted, thereby determining the insertion depth of the cylinder 3.

[0026] According to a further optimized solution, an extrusion block 12 is fixedly connected to one end of the rotating rod 7 close to the middle of the ring 4 and close to the cylinder 3 .

[0027] Installing the squeezing block 12 on the rotating rod 7 can better clamp the guide wire 1 . When the rotating rod 7 is parallel to the axis of the ring 4 , the squeezing block 12 can completely enter the installation groove 5 .

[0028] According to a further optimized solution, a slide plate 13 is fixedly connected to one end of the slider 10 close to the rotating rod 7 .

[0029] The area of ​​the slide plate 13 is larger than the cross-sectional area of ​​the through hole 9. The slide plate 13 is parallel to the bottom of the mounting groove 5. The slide plate 13 is confined in the mounting groove 5 to prevent the slider 10 from escaping from the through hole 9 and to provide sufficient area to abut against the rotating rod 7 to ensure smooth rotation of the rotating rod 7.

[0030] When using the utility model, first open an opening in the patient's femoral artery, then insert the end of the cylinder 3 away from the ring 4 until the annular baffle 11 abuts against the skin, then insert the end of the guide wire 1 that forms a ball 2 into the patient's femoral artery through the ring 4 and the cylinder 3 and enter the heart along the artery. Because of the existence of the rotating rod 7, the guide wire 1 can only enter but not exit. Then, surgical instruments can be transported to the aortic valve through the ring 4, the cylinder 3 and the guide wire 1 for surgery. After the surgery, press the slider 10 inward by hand to let the squeezing block 12 leave the guide wire 1, so that the guide wire 1 can be pulled out; in addition, during the operation, when pulling out surgical instruments such as the catheter, it is also necessary to squeeze the slider 10 by hand to pull out the catheter.

[0031] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A delivery device for transcatheter aortic valve implantation, characterized in that: include: An introduction sheath portion and a guide wire portion; the guide wire portion comprises a guide wire (1), one end of which is formed with a sphere (2); the introduction sheath portion comprises a cylinder (3), one end face of the cylinder (3) is coaxially fixedly connected with a ring (4), the inner diameter of the ring (4) is equal to the inner diameter of the cylinder (3), and the diameter of the sphere (2) is smaller than the inner diameter of the cylinder (3); the inner wall of the ring (4) is provided with a plurality of installation grooves (5) at equal intervals along the circumferential direction, and a fixing component is installed in the installation groove (5); The fixing assembly comprises a support shaft (6) fixedly connected between two opposite groove walls of the installation groove (5), the support shaft (6) being perpendicular to the axis of the ring (4), a rotating rod (7) being rotatably mounted on the support shaft (6), the end of the rotating rod (7) close to the cylinder (3) being fixedly connected to the groove bottom of the installation groove (5) via a spring (8); a through hole (9) is provided at a position corresponding to the groove bottom of the installation groove (5) and the end of the rotating rod (7) away from the cylinder (3), and a sliding block (10) is slidably arranged in the through hole (9).

2. A transcatheter aortic valve implantation delivery device according to claim 1, characterized in that: An annular baffle (11) is fixedly connected to one end of the outer wall of the cylinder (3) close to the ring (4).

3. A transcatheter aortic valve implantation delivery device according to claim 1, characterized in that: An extrusion block (12) is fixedly connected to one end of the rotating rod (7) close to the middle of the ring (4) and close to the cylinder (3).

4. A transcatheter aortic valve implantation delivery device according to claim 1, characterized in that: One end of the sliding block (10) close to the rotating rod (7) is fixedly connected with a sliding plate (13).

Images