Stent delivery device for vascular interventional surgery

Abstract

The utility model relates to the technical field of stent delivery devices, in particular to a stent delivery device for a vascular interventional operation, which comprises an outer tube and an inner tube, the inner tube is arranged in the outer tube in a penetrating manner, a gap for accommodating a stent is arranged between the outer tube and the inner tube, one end of the inner tube is a spherical bulge, and an accommodating groove is formed in the annular side surface of the inner tube; the first channel and the installation cavity are used for storing ultrasonic array elements, the second channel can be provided with long and straight intervention consumables, namely guide wires, in a penetrating mode, the stent is installed outside the inner tube and located outside the containing groove, then the device enters a blood vessel through traction of the guide wires, after the device reaches a set position, the outer tube and the inner tube are operated to slide mutually, and the ultrasonic array elements are fixed. The stent is expanded until the stent is exposed to the outside, so that the stent is expanded to be opened and supported in the blood vessel, and then the device is taken out; and in the equipment, through the arrangement of the accommodating groove, the bracket can be prevented from shifting in the moving process of the equipment, and the stability of the bracket is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of stent delivery device technology, and in particular to a stent delivery device for vascular interventional surgery. Background Technology

[0002] A vascular stent is a medical device used to treat narrowing or occlusion of blood vessels. It is typically a tubular structure made of metal or polymer materials. Its function is to support the narrowed or occluded segment of the blood vessel after angioplasty, reducing elastic recoil and maintaining patency. Vascular stents are widely used in the treatment of diseases of the coronary arteries, intracranial arteries, carotid arteries, renal arteries, and femoral arteries, and are classified into coronary stents, intracranial stents, and peripheral vascular stents. The diameter of a vascular stent is generally 2-6 mm, the wall thickness is about 0.1-0.2 mm, and the length varies depending on the location of the lesion, ranging from a few millimeters to tens of millimeters. The stent manufacturing process includes microtubule preparation, laser cutting, and chemical polishing. During the procedure, the stent is folded around a balloon at the end of a catheter and guided through the artery to the site of the blockage. After the balloon inflates, the stent expands and locks in place within the artery to support the arterial wall and prevent re-narrowing after angioplasty. This interventional procedure, percutaneous coronary intervention (PCI), is a commonly used technique in the treatment of coronary artery disease.

[0003] In the field of vascular interventional surgery, the accurate delivery and placement of stents plays a crucial role in the treatment of cardiovascular diseases (such as coronary atherosclerotic heart disease, peripheral artery disease, etc.). Stents are commonly used medical interventional devices for treating vascular lesions. Guided by a microguidewire, the stent reaches the lesion location, and the doctor expands the stent to improve the patency of the blood vessel, thereby achieving the purpose of treatment.

[0004] In the prior art, Chinese Patent No. CN221106150U discloses a stent delivery device and a vascular interventional surgery robot for vascular interventional surgery. The stent delivery device includes: an outer tube; an inner tube, which is partially sleeved inside the outer tube, and the inner tube and the outer tube can move relatively linearly. There is a gap between the inner tube and the outer tube for sleeved stent. The inner tube has a first chamber and a second chamber that are isolated from each other. The first chamber is equipped with electrical components, and the second chamber can accommodate long straight interventional consumables.

[0005] In this patent, the stent is directly installed on the outside of the inner tube. However, when the inner and outer tubes move within the blood vessel, the stent may shift or slide, thus affecting the installation of the stent. Utility Model Content

[0006] In response to the technical problem mentioned in the background art, where the stent is directly installed on the outside of the inner tube, and the stent may shift or slide when the inner and outer tubes move within the blood vessel, thus affecting the installation of the stent, this utility model provides a stent delivery device for vascular interventional surgery.

[0007] The technical solution adopted by this utility model is: a stent delivery device for vascular interventional surgery, including an outer tube and an inner tube, wherein the inner tube is disposed inside the outer tube, and there is a gap between the outer tube and the inner tube for accommodating the stent. One end of the inner tube is a spherical protrusion, and the annular side of the inner tube is provided with a receiving groove. The interior of the inner tube is provided with a through groove, one end of the through groove is provided with a first channel, and one side of the interior of the inner tube is provided with an installation cavity. The through groove, the first channel and the installation cavity are interconnected. The interior of the inner tube is also provided with a second channel, and the exterior of the outer tube is provided with an oblique hole.

[0008] In one embodiment, the edge of the receiving groove is set as an arc-shaped edge, and the inner part of the outer tube is provided with an arc-shaped protrusion at the position corresponding to the receiving groove.

[0009] In one embodiment, the connection between the through groove and the first channel is configured as a bevel.

[0010] In one embodiment, the inner tube is further provided with a through channel.

[0011] In one embodiment, both the first channel and the second channel are arc-shaped structures.

[0012] In one embodiment, a tie rod is fixedly connected to the outside of the outer tube.

[0013] In one embodiment, a fixing ring is fixedly connected to the outside of the inner tube, and a spring is fixedly connected between the fixing ring and the outer tube.

[0014] The beneficial effects of this invention are as follows: Compared with the prior art, in this invention, the first channel and the mounting cavity are used to store ultrasound array elements, and the second channel can be used to pass through a long straight interventional consumable, i.e., a guide wire, to install the stent outside the inner tube and outside the receiving groove. Then, the device is inserted into the blood vessel by the traction of the guide wire. After reaching the set position, the outer tube and the inner tube are slid against each other until the stent is exposed to the outside, so that the stent can expand and open, supporting itself in the blood vessel. Then the device can be removed. In this device, the setting of the receiving groove can prevent the stent from shifting during the movement of the device, thus ensuring the stability of the stent. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0017] Figure 3 yes Figure 2 A magnified structural diagram of region A in the middle.

[0018] The diagram is marked as follows:

[0019] 100. Inner tube; 1001. Fixing ring; 1002. Spring; 1003. First channel; 1004. Beveled edge; 1005. Through channel; 1006. Mounting cavity; 1007. Second channel; 1008. Receiving groove; 1009. Arc-shaped edge; 10010. Through groove;

[0020] 200. Outer tube; 2001. Tie rod; 2002. Angled hole; 2003. Arc-shaped protrusion;

[0021] 300. Bracket. Detailed Implementation

[0022] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The following is in conjunction with the appendix Figure 1-3 The present invention will be further described below.

[0025] In order to solve the problems existing in the background art, this application proposes the following technical solution: a stent 300 delivery device for vascular interventional surgery.

[0026] The specific technical solution includes an outer tube 200 and an inner tube 100. The inner tube 100 passes through the outer tube 200 and can slide relative to each other. A gap exists between the outer tube 200 and the inner tube 100 to accommodate a support 300. The annular side of the inner tube 100 has a receiving groove 1008. The receiving groove 1008 stores the support 300, preventing it from shifting outside the inner tube 100. To further support the support 300, the edge of the receiving groove 1008 is provided with an arc-shaped edge 1009. An arc-shaped protrusion 2003 is provided inside the outer tube 200 at the position corresponding to the receiving groove 1008.

[0027] In a further design, one end of the inner tube 100 has a spherical protrusion used to block the outer tube 200. Inside the inner tube 100, there is a through groove 10010, and one end of the through groove 10010 has a first channel 1003. Inside the inner tube 100, there is also a through channel 1005. One side of the inner tube 100 has an installation cavity 1006. The through groove 10010, the first channel 1003, and the installation cavity 1006 are interconnected. Inside the inner tube 100, there is also a second channel 1007. Both the first channel 1003 and the second channel 1007 are arc-shaped structures. The outer tube 200 has an oblique hole 2002. The first channel 1003 and the installation cavity 1006 are used to store ultrasonic array elements. The through channel 1005 and the second channel 1007 can be used to insert long straight interventional consumables, i.e., guide wires. The oblique hole 2002 is used to insert the guide wires.

[0028] The arc-shaped structure of the first channel 1003 and the second channel 1007 facilitates the installation of relevant sensor components and the threading of the guide wire. The arc-shaped structure can reduce the resistance generated during the threading process.

[0029] In a further design, a bevel 1004 is set at the connection between the through groove 10010 and the first channel 1003 to reduce resistance.

[0030] In another embodiment, a pull rod 2001 is fixedly connected to the outside of the tube, and a fixing ring 1001 is fixedly connected to the outside of the inner tube 100. A spring 1002 is fixedly connected between the fixing ring 1001 and the outer tube 200. By operating the pull rod 2001, the inner tube 100 and the outer tube 200 can slide against each other until the stent 300 is exposed to the outside, so that the stent 300 can expand and open to support the blood vessel. The spring 1002 is used to buffer the sliding of the outer tube 200 to avoid excessive force without buffering.

[0031] In order for those skilled in the art to fully understand the technical solution, the usage method of this embodiment is as follows: the first channel 1003 and the mounting cavity 1006 are used to store ultrasonic array elements, and the through channel 1005 and the second channel 1007 can be used to pass through long straight interventional consumables, i.e. guide wires;

[0032] In use, the stent 300 is installed outside the inner tube 100 and outside the receiving groove 1008. Then, the device is inserted into the blood vessel by the traction of the guide wire. After reaching the set position, the pull rod 2001 is manually operated. By operating the pull rod 2001, the inner tube 100 and the outer tube 200 can slide against each other until the stent 300 is exposed to the outside. Thus, the stent 300 expands and opens, supporting itself in the blood vessel. Then the device can be removed.

[0033] In this device, the arc-shaped structure of the first channel 1003 and the second channel 1007 facilitates the installation of relevant sensor components and the threading of the guide wire. The arc-shaped structure reduces the resistance generated during the threading process, and the inclusion groove 1008 prevents the bracket 300 from shifting during device movement.

[0034] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0035] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A stent delivery device for use in a vascular intervention procedure, characterized in that, The utility model relates to a kind of stent delivery systems, including outer tube (200) and inner tube (100), the inner tube (100) is arranged in outer tube (200), the gap between outer tube (200) and inner tube (100) is used to accommodate stent (300), the one end of the inner tube (100) is spherical bulge, the annular side of the inner tube (100) is equipped with accommodating groove (1008), the inside of the inner tube (100) is equipped with through slot (10010), one end of the through slot (10010) is equipped with first passageway (1003), one side of the inside of the inner tube (100) is equipped with installation cavity (1006), the through slot (10010), first passageway (1003) and installation cavity (1006) are mutually through, the inside of the inner tube (100) is further equipped with second passageway (1007), the outside of the outer tube (200) is equipped with inclined hole (2002).

2. The stent delivery device for vascular intervention procedures according to claim 1, characterized in that, The edge of the accommodating groove (1008) is arranged as arc edge (1009), the inside of the outer tube (200) is equipped with arc bulge (2003) at the position of the corresponding accommodating groove (1008).

3. The stent delivery device for vascular intervention procedures according to claim 1, characterized in that, The junction between the through slot (10010) and first passageway (1003) is arranged as bevel (1004).

4. The stent delivery device for vascular intervention procedures according to claim 1, characterized in that, The inside of the inner tube (100) is further equipped with through channel (1005).

5. The stent delivery apparatus for vascular intervention procedures according to any one of claims 1-4, characterized in that, The first passageway (1003) and second passageway (1007) are both arc structure.

6. The stent delivery device for vascular intervention procedures according to claim 5, characterized in that, The outside of the outer tube (200) is fixedly connected with pull rod (2001).

7. The stent delivery device for vascular intervention procedures according to claim 6, characterized in that, The outside of the inner tube (100) is fixedly connected with fixed ring (1001), and spring (1002) is fixedly connected between the fixed ring (1001) and outer tube (200).

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