Novel cardiovascular stent implanter

Abstract

The utility model discloses a novel cardiovascular stent implanter which comprises a conveying outer tube, a supporting tube used for protecting and limiting a self-expanding intravascular stent is movably arranged in an inner cavity of the conveying outer tube, a containing groove is formed in the outer side of the supporting tube, and the intravascular stent is arranged on the outer side of the supporting tube in a sleeved mode and located in the containing groove. The intravascular stent is limited between the supporting tube and the conveying outer tube, a containing groove is formed in the supporting tube, a sheath tube is installed at the tail of the conveying outer tube, one end of the sheath tube is in threaded connection with a threaded column, and one end of the threaded column penetrates through an inner cavity of the conveying outer tube and is movably connected with the supporting tube. After the supporting tube is pushed outwards by the threaded column, limitation between blood vessels is relieved, the supporting tube can expand automatically and then is supported on the inner walls of the blood vessels, and meanwhile a protection structure is arranged at the end of the conveying outer tube and used for limiting and protecting the intravascular stent. The whole stent device suite is sent to a diseased region through the guide wire to be released.

Description

Technical Field

[0001] The utility model relates to the technical field of vascular stent implantation, and particularly relates to a novel cardiovascular stent implantator. Background Technique

[0002] A vascular stent refers to a stent placed in a diseased segment on the basis of balloon dilation of a lumen to support a stenotic or occluded blood vessel, reduce elastic recoil and reshaping of the blood vessel, and keep the lumen unobstructed. Some stents also have the function of preventing restenosis. They are mainly divided into coronary stents, cerebrovascular stents, renal artery stents, aortic stents, etc.

[0003] In the prior art, the Chinese utility model content with the authorization announcement number: CN211067225U discloses a delivery system for a novel self-expanding vascular stent. The delivery system consists of a loading tube, a pushing hose, and a delivery wire. When loading the self-expanding vascular stent, the delivery wire passes through the head end of the self-expanding vascular stent through a perforation instead of being wrapped around the outside of the stent, and finally passes out from the inside of the pushing hose. When delivering the stent, the pushing hose can push the self-expanding vascular stent from the head end of the self-expanding vascular stent through the delivery wire, thereby preventing the shortening of the self-expanding vascular stent during the delivery process. When tying the stent, the delivery wire is not tied around the outside of the stent, making it more convenient and simple to disassemble the delivery wire outside the body after the stent is implanted into the human body, and it is not easy to make mistakes.

[0004] The above technical solution uses three methods to deliver the self-expanding vascular stent, including:

[0005] 1. The delivery wire penetrates through the self-expanding vascular stent, and the pushing hose pulls the self-expanding vascular stent out of the loading tube through the delivery wire;

[0006] 2. A conical support rod is inserted into the head of the self-expanding vascular stent, and then the self-expanding vascular stent is moved out by the movement of the threaded tube;

[0007] 3. A spindle-shaped support rod and barbs are used to clamp and limit the self-expanding vascular stent, and then the self-expanding vascular stent is moved out by the threaded tube;

[0008] The above technical solutions all connect a tool to the vascular stent and then move the vascular stent by pulling and pushing, which easily causes damage to the blood vessels during the movement. At the same time, the vascular stent moves in the blood vessel while located in the loading tube, and some thrombi in the blood will enter the loading tube and contact the vascular stent, resulting in thrombi adhering to the vascular stent and affecting the automatic expansion of the vascular stent after it is moved out. Utility Model Content

[0009] The purpose of the present utility model is to provide a novel cardiovascular stent implantator, which uses a support tube to store and protect the vascular stent, restricts the vascular stent within the delivery outer tube, and then through the push of a threaded stud, the support tube is moved out of the delivery outer tube. After the vascular stent is released from the restriction of the delivery outer tube, it automatically expands and supports within the blood vessel, ensuring the stability of the vascular stent during the implantation process to prevent damage to the vascular stent and inability to expand, so as to solve the problems raised in the above-mentioned background technology.

[0010] To achieve the above object, the present utility model provides the following technical solution: A novel cardiovascular stent implantator, including a delivery outer tube, wherein a support tube for protecting and limiting a self-expanding vascular stent is movably arranged in the inner cavity of the delivery outer tube. A storage groove is formed on the outer side of the support tube, and the vascular stent is sleeved on the outer side of the support tube and located within the storage groove. A sheath tube is installed at the tail of the delivery outer tube, and one end of the sheath tube is threadedly connected with a threaded stud. One end of the threaded stud penetrates into the inner cavity of the delivery outer tube and is movably connected with the support tube;

[0011] It further includes a protection structure;

[0012] The protection structure includes four groups of protection members located at the head of the delivery outer tube. The end of the protection member away from the delivery outer tube bends inward, and the protection member is made of an elastic memory material;

[0013] It further includes a limiting airbag arranged on the outer side of the delivery outer tube;

[0014] A guide wire hole is formed on the sheath tube, and a guiding wire is inserted into the guide wire hole. The guiding wire penetrates through the delivery outer tube and the support tube.

[0015] Preferably, a fixing frame is fixed at the end of the support tube, and a movable seat is movably arranged on the fixing frame. The end of the threaded stud is fixedly connected with the movable seat.

[0016] Preferably, an air guide tube communicated with the limiting airbag is arranged on the inner side of the delivery outer tube, and a joint for clamping and communicating with the air guide tube is arranged on the sheath tube.

[0017] Preferably, a plurality of through holes are formed on the outer side of the delivery outer tube, and the through holes are located between the limiting airbag and the sheath tube.

[0018] Preferably, the outer diameter of the support tube is the same as the inner diameter of the delivery outer tube, and anti-slip patterns are arranged on the outer side of the limiting airbag.

[0019] Preferably, the protection structure includes a fixing head fixed at one end of the support tube away from the fixing frame. A through hole communicated with the support tube is formed at the center of the fixing head. The fixing head is located on the outer side of the delivery outer tube, and the outer diameter of the fixing head is the same as the outer diameter of the delivery outer tube.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The utility model restricts the vascular stent between the support tube and the outer delivery tube, and utilizes the receiving groove to provide safety protection for the vascular stent. When the support tube is pushed outward by the threaded screw, the restriction between the blood vessels is released, the support tube can expand by itself, and then be supported on the inner wall of the blood vessel. At the same time, a protective structure is provided at the end of the outer delivery tube to provide position limiting protection for the vascular stent.

[0022] 2. The utility model sets a limiting airbag. After the outer delivery tube is moved to a specified position, the limiting airbag is expanded to limit the outer delivery tube, ensuring that the outer delivery tube will not be displaced again and ensuring the accuracy of the position of the vascular stent after it is transferred out of the outer delivery tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of Example 1 of the utility model;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the support tube and the threaded wire column of the utility model;

[0025] Figure 3 It is a three-dimensional structural schematic diagram of the outer delivery tube and the sheath tube of the utility model;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of Example 2 of the utility model.

[0027] Numbers in the figure: 1. outer delivery tube; 2. vascular stent; 3. support tube; 4. storage groove; 5. sheath tube; 6. threaded wire column; 7. protective part; 8. limiting airbag; 9. fixing frame; 10. movable seat; 11. air guide tube; 12. joint; 13. through hole; 14. anti-slip pattern; 15. fixing head; 16. through hole; 17. guide wire hole; 18. traction guide wire. DETAILED DESCRIPTION

[0028] 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.

[0029] Example 1

[0030] like Figures 1 to 3A novel cardiovascular stent implanter as shown in the figure includes a delivery outer tube 1. A support tube 3 for protecting and limiting a self-expanding vascular stent 2 is movably arranged in the inner cavity of the delivery outer tube 1. A storage groove 4 is formed on the outer side of the support tube 3. The vascular stent 2 is sleeved on the outer side of the support tube 3 and is located in the storage groove 4. A sheath tube 5 is installed at the tail of the delivery outer tube 1. One end of the sheath tube 5 is threadedly connected with a threaded stud 6. One end of the threaded stud 6 penetrates into the inner cavity of the delivery outer tube 1 and is movably connected with the support tube 3;

[0031] It also includes a protection structure;

[0032] The protection structure includes four groups of protection members 7 located at the head of the delivery outer tube 1. One end of the protection member 7 far from the delivery outer tube 1 bends inward. The protection member 7 is made of an elastic memory material;

[0033] It also includes a limiting airbag 8 arranged on the outer side of the delivery outer tube 1;

[0034] A guide wire hole 17 is formed on the sheath tube 5. A guiding wire 18 is inserted into the guide wire hole 17. The guiding wire 18 penetrates through the delivery outer tube 1 and the support tube 3;

[0035] By restricting the vascular stent 2 between the support tube 3 and the delivery outer tube 1 and using the storage groove 4 to safely protect the vascular stent 2, when the support tube 3 is pushed outwards by the threaded stud 6, the restriction between the blood vessels is released, and it can expand by itself and then support on the inner wall of the blood vessel. At the same time, a protection structure is arranged at the end of the delivery outer tube 1 to limit the support tube 3 and prevent the support tube 3 from shaking and moving out of the delivery outer tube 1.

[0036] A fixing frame 9 is fixed at the end of the support tube 3. A movable seat 10 is movably arranged on the fixing frame 9. The end of the threaded stud 6 is fixedly connected with the movable seat 10. By connecting the movable seat 10 movably arranged on the fixing frame 9 with the threaded stud 6, it is convenient to make the threaded stud 6 telescopically move in the delivery outer tube 1 after the threaded stud 6 rotates in the sheath tube 5, so as to drive the movement of the support tube 3 and facilitate moving the support tube 3 out of the delivery outer tube 1.

[0037] An air guide tube 11 communicated with the limiting airbag 8 is arranged on the inner side of the delivery outer tube 1. A joint 12 clamped and communicated with the air guide tube 11 is arranged on the sheath tube 5. By connecting the joint 12 on the sheath tube 5 with the air guide tube 11, it is convenient to inflate the limiting airbag 8 from outside the body to make it expand.

[0038] A plurality of through holes 13 are formed on the outer side of the delivery outer tube 1. The through holes 13 are located between the limiting airbag 8 and the sheath tube 5. Through the arrangement of the through holes 13, it is ensured that the blood flow remains unobstructed, and it is avoided that after the delivery outer tube 1 is inserted into the blood vessel, due to the expansion and support of the limiting airbag 8, the blood flow in the blood vessel is blocked.

[0039] The outer diameter of the support tube 3 is the same as the inner diameter of the delivery outer tube 1. Anti-slip patterns 14 are provided on the outer side of the limiting airbag 8. By defining the dimensions of the support tube 3 and the delivery outer tube 1, it is ensured that the support tube 3 fits against the inner wall of the delivery outer tube 1 to limit the vascular stent 2, so as to prevent the gap between the two from being too large, resulting in the expansion of the vascular stent 2 and its removal from the gap. At the same time, the anti-slip patterns 14 on the outer side of the limiting airbag 8 can increase the friction between the limiting airbag 8 and the blood vessel wall, ensuring that the delivery outer tube 1 is stably fixed.

[0040] During specific use, first insert the guide wire 18 into the blood vessel, then compress the vascular stent 2 into the receiving groove 4 on the support tube 3, and then move the support tube 3 into the inner cavity at the head of the delivery outer tube 1. At this time, the protective member 7 protects the head of the delivery outer tube 1 and at the same time restricts the support tube 3 from moving out of the delivery outer tube 1. Put the delivery outer tube 1 on the outside of the guide wire 18 from the head and penetrate through the guide wire hole 17, so that the delivery outer tube extends along the guide wire 18 and is inserted into the blood vessel. After the head of the delivery outer tube 1 moves to the designated position, use the connector 12 to inflate the limiting airbag 8 through the air duct 11, so that the limiting airbag 8 expands to limit and support the delivery outer tube 1. Then rotate the threaded stud 6, so that the threaded stud 6 pushes the support tube 3 to move outward under the cooperation of the fixing frame 9. The protective member 7 expands outward under the extrusion of the support tube 3. When the support tube 3 moves outward and the part of the receiving groove 4 on the support tube 3 moves out of the delivery outer tube 1, the vascular stent 2 automatically expands and supports in the blood vessel. Then rotate the threaded stud 6 in the reverse direction to retract the support tube 3 partially exposed outside the delivery outer tube 1 into the interior of the delivery outer tube 1, and then pull the delivery outer tube 1 out of the blood vessel along the guide wire 18. Finally, pull out the guide wire 18 from the blood vessel to complete the implantation of the vascular stent 2.

[0041] Embodiment 2

[0042] The same parts as in Embodiment 1 will not be repeated here. The differences are as follows Figure 4 As shown: A novel cardiovascular stent implantor includes a delivery outer tube 1. A support tube 3 for protecting and limiting a self-expanding vascular stent 2 is movably arranged in the inner cavity of the delivery outer tube 1. A receiving groove 4 is formed on the outer side of the support tube 3. The vascular stent 2 is sleeved on the outer side of the support tube 3 and is located in the receiving groove 4. A sheath tube 5 is installed at the tail of the delivery outer tube 1. One end of the sheath tube 5 is threadedly connected with a threaded stud 6. One end of the threaded stud 6 penetrates into the inner cavity of the delivery outer tube 1 and is movably connected with the support tube 3;

[0043] It also includes a protection structure;

[0044] The protection structure includes a fixed head 15 fixed at one end of the support tube 3 away from the fixing frame 9. A through hole 16 communicating with the support tube 3 is formed at the center of the fixed head 15. The fixed head 15 is located outside the delivery outer tube 1, and the outer diameter of the fixed head 15 is the same as the outer diameter of the delivery outer tube 1;

[0045] It further includes a limiting airbag 8 arranged outside the conveying outer tube 1;

[0046] A guide wire hole 17 is formed in the sheath tube 5, and a guiding guide wire 18 is inserted into the guide wire hole 17, and the guiding guide wire 18 penetrates through the conveying outer tube 1 and the support tube 3;

[0047] The fixing head 15 can limit the depth of the support tube 3 extending into the conveying outer tube 1, and at the same time protect the support tube 3, and then the through hole 16 ensures the blood circulation.

[0048] During specific use, the operation steps are the same as those in Embodiment 1, except that the fixing head 15 is installed at the end of the support tube 3 to limit the vascular stent 2 and moves along with the movement of the support tube 3.

[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel cardiovascular stent implanter, comprising a delivery outer tube (1), characterized in that: A support tube (3) for protecting and limiting a self-expanding vascular stent (2) is movably arranged in the inner cavity of the conveying outer tube (1). A receiving groove (4) is formed on the outer side of the support tube (3). The vascular stent (2) is sleeved on the outer side of the support tube (3) and located in the receiving groove (4). A sheath tube (5) is installed at the tail of the conveying outer tube (1). One end of the sheath tube (5) is threadedly connected with a threaded stud (6). One end of the threaded stud (6) penetrates into the inner cavity of the conveying outer tube (1) and is movably connected with the support tube (3). It further includes a protection structure; The protection structure includes four groups of protection members (7) located at the head of the conveying outer tube (1). One end of the protection member (7) far from the conveying outer tube (1) bends inward. The protection member (7) is made of an elastic memory material; It further includes a limiting airbag (8) arranged on the outer side of the conveying outer tube (1); A guide wire hole (17) is formed on the sheath tube (5). A guiding wire (18) is inserted into the guide wire hole (17). The guiding wire (18) penetrates through the conveying outer tube (1) and the support tube (3).

2. The novel cardiovascular stent implanter according to claim 1, wherein: A fixing frame (9) is fixed at the end of the support tube (3). A movable seat (10) is movably arranged on the fixing frame (9). The end of the threaded stud (6) is fixedly connected with the movable seat (10).

3. A novel cardiovascular stent implanter according to claim 1, characterized in that: An air guide tube (11) communicated with the limiting airbag (8) is arranged on the inner side of the conveying outer tube (1). A joint (12) for clamping and communicating with the air guide tube (11) is arranged on the sheath tube (5).

4. A novel cardiovascular stent implanter according to claim 1, characterized in that: A plurality of through holes (13) are formed on the outer side of the conveying outer tube (1). The through holes (13) are located between the limiting airbag (8) and the sheath tube (5).

5. A novel cardiovascular stent implantator according to claim 1, characterized in that: The outer diameter of the support tube (3) is the same as the inner diameter of the conveying outer tube (1). Anti-slip patterns (14) are arranged on the outer side of the limiting airbag (8).

6. The novel cardiovascular stent implanter according to claim 1, wherein: The protection structure includes a fixing head (15) fixed at one end of the support tube (3) far from the fixing frame (9). A through hole (16) communicated with the support tube (3) is formed at the center of the fixing head (15). The fixing head (15) is located on the outer side of the conveying outer tube (1). The outer diameter of the fixing head (15) is the same as the outer diameter of the conveying outer tube (1).

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