Vertebral stent delivery device and vertebral stent kit

Abstract

The present invention relates to a vertebral stent delivery device and a vertebral stent kit. The vertebral stent delivery device is used in conjunction with a vertebral stent. The vertebral stent delivery device includes a handheld portion and a push tube member, the handheld portion is provided with a housing chamber for accommodating the vertebral stent, the handheld portion surface is provided with a bullet feed chamber, a push tube hole and a launch hole, the bullet feed chamber, the push tube hole and the launch hole are all connected to the housing chamber, the vertebral stent enters the housing chamber through the bullet feed chamber, the push tube member is located in the push tube hole, and the push tube member is provided with a gripping portion at one end facing the housing chamber. The present invention facilitates the rapid and accurate delivery of multiple vertebral stents into the human spine through the provision of components such as a gripping portion.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to a vertebral stent delivery device and a vertebral stent kit. Background Art

[0002] When the vertebral bone density decreases and is subjected to large external forces, the spine is prone to fractures. The current effective method is to strengthen the vertebrae by pouring bone cement, but bone cement has the risk of leakage, which can lead to risks such as pulmonary embolism and nerve damage. At the same time, after the bone cement solidifies, its hardness will be greater than the hardness of the vertebrae, which will continue to compress adjacent vertebrae and cause compression fractures of other vertebrae.

[0003] At present, some scholars have proposed the concept of using vertebral stents to reduce the use of balloons and bone cement. However, the current research direction is still to place a single-layer stent in the body and then match it with bone cement. This method can only reduce the use of bone cement. If you need to avoid the use of bone cement, you need to increase the support strength of the vertebral stent, but because of material limitations, simply increasing the size of the stent still cannot meet clinical needs. An effective method is to place multiple layers of vertebral stents to synergistically enhance the support strength.

[0004] When multiple vertebral stents need to be deployed, there are two major problems that need to be solved during the deployment of the vertebral stents:

[0005] First, the position of vertebral stent expansion is very important. Not only the first layer of vertebral stents must be expanded strictly according to the expected position, but also the matching form of each layer of stents is very important. Each subsequent layer of vertebral stents must be placed strictly according to the expected angle position, otherwise the support effect will not meet the expected requirements.

[0006] Secondly, currently, the vertebral stent is usually produced as a whole with the delivery device during the production process to form a vertebral stent delivery kit, that is, in each vertebral stent delivery kit, a vertebral stent is provided at the end of the delivery device. However, if multiple vertebral stents need to be delivered inside the vertebral body, due to the complete production of the vertebral stent delivery kit, multiple vertebral stent delivery kits are required to perform repeated work, such as realigning the vertebral channel, determining the delivery area, etc., which increases the complexity of the operation and the probability of failure. Summary of the invention

[0007] In view of the problems existing in the above-mentioned prior art, the object of the present invention is to provide a vertebral stent delivery device and a vertebral stent kit, which are convenient for accurately and quickly delivering multiple vertebral stents to the surgical site.

[0008] The purpose of the present invention is achieved through the following technical solutions:

[0009] A vertebral stent delivery device, used for use with a vertebral stent; the vertebral stent delivery device includes a handheld portion and a push tube member, the handheld portion is provided with a accommodating cavity for accommodating the vertebral stent, the handheld portion surface is provided with a bullet feeding cavity, a push tube hole and a launch hole, the bullet feeding cavity, the push tube hole and the launch hole are all connected to the accommodating cavity, the vertebral stent enters the accommodating cavity through the bullet feeding cavity, the push tube member is located in the push tube hole, and a gripping portion is provided on one end of the push tube member facing the accommodating cavity; the push tube member is moved toward the vertebral stent, and the gripping portion grips the The vertebral support is described, and the push tube member pushes the vertebral support to pass through the launch hole; the vertebral support includes a tubular shell and a memory alloy support arranged in the tubular shell; the push tube member is moved toward the vertebral support, and the grasping part grasps the memory alloy support, and after the push tube member passes through the tubular shell, it pushes the memory alloy support to pass through the launch hole; it also includes a blocking mechanism and a bullet discharge cavity arranged on the surface of the hand-held part, and the bullet discharge cavity is connected with the accommodating cavity; the blocking mechanism is moved, and the blocking mechanism switches between shielding the bullet feed cavity or the bullet discharge cavity.

[0010] Furthermore, the hand-held part is cylindrical, and the blocking mechanism is a rotating part arranged around the outer wall of the hand-held part, and the rotating part can rotate around the axis of the hand-held part; when the rotating part is rotated, the rotating part covers the bullet feeding cavity or covers the bullet discharging cavity.

[0011] Furthermore, the accommodating cavity accommodates one vertebral support, and the bullet feeding cavity accommodates at least one vertebral support; the rotating member includes an arc member, a connecting rod arranged on the arc member, and a dividing block connected to the connecting rod, the arc member is arranged around the outer wall of the hand-held part, the hand-held part is provided with a clearance hole for the connecting rod to pass through, and the dividing block is arranged in the accommodating cavity; when the arc member is rotated, the position of the dividing block changes, and the arc member shields the opening of the bullet feeding cavity located on the surface of the hand-held part or the arc member shields the opening of the bullet discharging cavity located on the surface of the hand-held part; when the arc member shields the opening of the bullet feeding cavity located on the surface of the hand-held part, the dividing block separates the bullet feeding cavity and the accommodating cavity; when the arc member shields the opening of the bullet discharging cavity located on the surface of the hand-held part, the dividing block separates the bullet discharging cavity and the accommodating cavity.

[0012] Furthermore, it also includes a magazine part for accommodating the vertebral support, the magazine part is provided with a magazine opening, the arc part is provided with a bullet feeding hole, and the magazine opening is communicated with the bullet feeding hole.

[0013] Furthermore, the push tube member includes an outer push tube and an inner push tube arranged inside the outer push tube, the gripping portion is arranged at one end of the inner push tube facing the accommodating cavity, and the gripping portion can enter into the outer push tube.

[0014] Furthermore, the gripping portion is a spring sheet, and a channel for the spring sheet to enter is provided in the memory alloy bracket; after the spring sheet enters the channel, the spring sheet unfolds in a direction away from the axis of the inner push tube.

[0015] Furthermore, it also includes a positioning tube connected to the handheld part, the positioning tube is connected to the launch hole, and the aperture of the positioning tube is greater than or equal to the aperture of the launch hole.

[0016] A vertebral body support kit comprises any vertebral body support delivery device.

[0017] Furthermore, the memory alloy support is tubular, and a plurality of strip-shaped holes are arranged on the side wall of the memory alloy support, and the strip-shaped holes are sequentially arranged in a spiral shape around the axis of the memory alloy support.

[0018] Furthermore, the memory alloy stent is provided with two types, namely a positive spiral stent and a reverse spiral stent; in the positive spiral stent and the reverse spiral stent, the spiral directions of the plurality of spiral strip holes are opposite, and the memory alloy stent is a single-layer structure; the vertebral stent is provided with at least two, and the positive spiral stent and the reverse spiral stent are provided with at least one each.

[0019] Furthermore, at least two memory alloy brackets are provided, and the memory alloy brackets are sequentially sleeved with each other.

[0020] Furthermore, in adjacent memory alloy brackets, the spiral directions of the plurality of spiral strip-shaped holes are opposite.

[0021] Furthermore, the memory alloy bracket is provided with two, namely an inner bracket and an outer bracket sleeved outside the inner bracket, and the number of the strip holes located on the outer bracket is greater than the number of the strip holes located on the inner bracket.

[0022] Furthermore, the memory alloy bracket is provided with two, namely an inner bracket and an outer bracket sleeved outside the inner bracket, and the number of the strip holes on the outer bracket is less than the number of the strip holes on the inner bracket.

[0023] Compared with the prior art, the beneficial effect of the present invention is that: by arranging a receiving chamber, a bullet feeding chamber, a push tube hole and a launching hole in the handheld part, a push tube member is arranged in the push tube hole, and a gripping part is arranged at one end of the push tube member facing the receiving chamber. The vertebral stent can enter the receiving chamber from the bullet feeding chamber, and then the push tube member is moved to make the gripping part grip the vertebral stent, and the push tube member is continued to be moved, and the push tube member and the vertebral stent pass through the launching hole together. The positions of the handheld part and the push tube member are adjusted so that the vertebral stent can accurately reach the surgical position. After the vertebral stent reaches the surgical position, the vertebral stent is driven to separate from the gripping part, and the vertebral stent is successfully implanted into the human spine. The present invention facilitates the accurate placement of the vertebral stent into the human spine, and because the vertebral stent can be accurately placed, it is convenient to reduce the possibility of secondary damage to the human body due to incorrect placement of the vertebral stent. At the same time, due to the arrangement of the receiving chamber and the bullet feeding chamber, the vertebral stent is convenient to be quickly installed in the vertebral stent placement device. For example, when the vertebral stent is made of memory alloy material, multiple vertebral stents can be quickly stacked in the vertebral body. Since multiple stacked vertebral stents can be quickly implanted in the vertebral body, the amount of bone cement used during surgery can be reduced or no bone cement may be used. Even if bone cement is used, it is not easy to leak due to the obstruction of the vertebral stent, effectively reducing the probability of secondary damage to the human body due to bone cement leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a first stereoscopic schematic diagram of a vertebral body support of the present invention;

[0025] Figure 2 is a second stereoscopic schematic diagram of a vertebral body support of the present invention;

[0026] Figure 3 It is a three-dimensional schematic diagram of the vertebral stent delivery device of the present invention;

[0027] Figure 4 is a three-dimensional schematic diagram of a handheld portion of the present invention;

[0028] Figure 5 is a front view of the handheld portion of the present invention;

[0029] Figure 6 yes Figure 5 Sectional view of section AA;

[0030] Figure 7 It is a three-dimensional schematic diagram of the pipe pusher of the present invention;

[0031] Figure 8 It is a right side view of the vertebral stent delivery device of the present invention;

[0032] Fig. 9 yes Figure 8 Cross-sectional view of the middle BB section;

[0033] Fig.10 yes Fig. 9 The enlarged schematic diagram of the middle C part;

[0034] Fig.11 yes Figure 7 The enlarged schematic diagram of the middle D part;

[0035] Fig.12 is a schematic diagram of other embodiments of the vertebral stent delivery device of the present invention;

[0036] Fig.13 This is a first schematic diagram of the arc member shielding the bullet cavity in the present invention;

[0037] Fig.14 is a first schematic diagram of the arc member shielding the bullet cavity of the present invention;

[0038] Fig.15 is a second schematic diagram of the arc member shielding the bullet cavity of the present invention;

[0039] Fig.16 is a second schematic diagram of the arc member shielding the bullet-entry cavity of the present invention;

[0040] Fig.17 is a three-dimensional schematic diagram of a rotating member of the present invention;

[0041] Fig.18 is a first stereoscopic schematic diagram of the memory alloy bracket of the present invention;

[0042] Fig.19 is a second stereoscopic schematic diagram of the memory alloy bracket of the present invention;

[0043] Fig. 20 is a third stereoscopic schematic diagram of the memory alloy bracket of the present invention;

[0044] Fig.21 It is a fourth stereoscopic schematic diagram of the memory alloy bracket of the present invention.

[0045] In the figure:

[0046] 1-vertebral support; 1a-tubular shell; 1b-memory alloy support; 1ba-inner support; 1bb-outer support; 1c-strip hole; 1d-bullet head; 2-handle; 3-push tube; 3a-outer push tube; 3b-inner push tube; 4-accommodating chamber; 5-bullet feeding chamber; 6-push tube hole; 6a-first tube hole; 6b-second tube hole; 7-firing hole; 8-bullet discharge chamber; 9-arc member; 10-connecting rod; 11-separation block; 12-giving hole; 13-magazine member; 14-bullet feeding hole; 15-shrapnel; 16-positioning tube; 17-bell mouth; 18-guide ring; 19-first handle; 20-second handle; 21-observation hole. DETAILED DESCRIPTION

[0047] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] like Figures 1 to 9 As shown, in view of the defect of using a large amount of bone cement in current spinal treatment surgeries, the present invention discloses a vertebral stent delivery device, which is intended to quickly and accurately deliver multiple vertebral stents 1 into the human spine, and reduce or eliminate the use of bone cement according to the degree of collapse of the spine. In detail, the vertebral stent delivery device of the present invention is used in conjunction with the vertebral stent 1. The vertebral stent delivery device of the present invention includes a handheld portion 2 and a push tube 3. Figures 4 to 6 As shown, the handle 2 is provided with a receiving cavity 4 for receiving the vertebral body support 1, and the surface of the handle 2 is provided with a bullet feeding cavity 5, a tube pushing hole 6 and a firing hole 7, which are all connected to the receiving cavity 4. The vertebral body support 1 can enter the receiving cavity 4 through the bullet feeding cavity 5. Figures 6 to 9 As shown, the push tube member 3 is located in the push tube hole 6, and a gripping portion is provided at one end of the push tube member 3 facing the accommodating cavity 4. The push tube member 3 moves toward the vertebral support 1, the gripping portion grips the vertebral support 1, and the push tube member 3 pushes the vertebral support 1 through the launch hole 7.

[0051] Before use, the vertebral stent delivery device of the present invention needs to construct a channel for the vertebral stent 1 to enter on the patient's spine. Due to the arrangement of the accommodating chamber 4, the bullet feeding chamber 5 and other cavities, the vertebral stent 1 can enter the accommodating chamber 4 through the bullet feeding chamber 5. Then move the push tube 3 so that the gripping part grips the vertebral stent 1. Continue to move the push tube 3 so that the push tube 3 and the vertebral stent 1 pass through the launching hole 7 together. Then adjust the position of the handheld part 2 and the push tube 3, and pass the vertebral stent 1 into the human spine through the channel. Fine-tune the position of the handheld part 2 and the push tube 3 so that the vertebral stent 1 is accurately located at a suitable placement position in the human spine. After the vertebral stent 1 reaches a suitable placement position, drive the vertebral stent 1 to separate from the gripping part, and the vertebral stent 1 is successfully implanted into the human spine.

[0052] The vertebral stent delivery device disclosed in the present invention facilitates the accurate delivery of the vertebral stent 1 into the human spine, reducing the possibility of secondary damage to the human body caused by incorrect delivery of the vertebral stent 1. At the same time, due to the provision of the accommodating chamber 4 and the bullet feeding chamber 5, the vertebral stent 1 is easily installed in the vertebral stent delivery device, thereby enabling multiple vertebral stents 1 to be quickly delivered into the vertebral body.

[0053] In the vertebral stent delivery device of the present invention, the detailed structure of the handheld part 2, the detailed structure of the push tube member 3 and many other technical features have multiple implementations. In the following, among the detailed structure of the push tube member 3 and many other technical features, each technical feature selects one implementation for detailed description, and the embodiment in which the implementation is located is referred to as this embodiment. Other implementations of the detailed structure of the push tube member 3 and many other features are referred to as other embodiments, and other embodiments are briefly described below.

[0054] In this embodiment, if Figure 1 , Figure 2 , Fig. 9 and Fig.10As shown, the vertebral stent 1 includes a tubular shell 1a and a memory alloy stent 1b arranged in the tubular shell 1a. The tubular shell 1a is made of stainless steel, and the memory alloy stent 1b is made of nickel-titanium memory alloy. The nickel-titanium memory alloy has a certain elasticity. After being implanted in the human body, the nickel-titanium memory alloy can produce micro-motion during human activities, which plays a role in promoting bone growth. During the operation of the vertebral stent delivery device of the present invention, after the vertebral stent 1 enters the accommodating cavity 4, the push tube 3 is moved toward the vertebral stent 1. The gripping part grips the memory alloy stent 1b, and after the push tube 3 passes through the tubular shell 1a, it pushes the memory alloy stent 1b through the launch hole 7. The present invention has the following advantages by configuring the vertebral stent 1 to be composed of a tubular shell 1a and a memory alloy stent 1b. First, the memory alloy stent 1b finally enters the inside of the spine, so before entering the human body, the memory alloy stent 1b is in a contracted state. After the memory alloy stent 1b is located inside the spine, the memory alloy stent 1b is affected by the body temperature of the human body and expands and expands, so that the wound for the memory alloy stent 1b to enter can be reduced. Second, the memory alloy stent 1b can self-expand in the human body, so that multiple memory alloy stents 1b can be quickly stacked in layers in the vertebral body. Due to the implantation of multiple stacked memory alloy stents 1b, the amount of bone cement used in the operation can be reduced or bone cement can be omitted. Even if bone cement is used, it is not easy to leak due to the obstruction of the memory alloy stent 1b, which effectively reduces the probability of secondary damage to the human body caused by bone cement leakage. Third, in the process of loading the vertebral stent 1 into the handheld part 2, due to the protection of the tubular shell 1a, the memory alloy stent 1b is prevented from contacting the handheld part 2, so as to avoid damage to the memory alloy stent 1b. At the same time, during the transportation of the vertebral stent 1, the tubular shell 1a can also protect the memory alloy stent 1b. Fourth, when the handheld portion 2 can accommodate multiple vertebral stents 1, such as a vertebral stent 1 is provided in the accommodating chamber 4 and a vertebral stent 1 is provided in the bullet feeding chamber 5, the vertebral stents 1 will inevitably contact each other. The setting of the tubular shell 1a can avoid the mutual influence between the memory alloy stents 1b located in different vertebral stents 1. Fifth, since the tubular shell 1a is tubular, the arc surface of the tubular shell 1a facilitates the vertebral stent 1 to be loaded into the bullet feeding chamber 5. In other embodiments, the vertebral stent 1 may not contain a memory alloy material, such as the vertebral stent 1 may also be made of only a single implant stent, the implant stent may be made of a cobalt-chromium-tungsten-nickel alloy, and the implant stent cannot be deformed. Alternatively, although the vertebral stent 1 may be made of only a single implant stent, the implant stent is deformable, and the implant stent is in a contracted state under normal conditions, but when the implant stent enters the spine, the external device is operated to control the implant stent to unfold, thereby supporting the spine.

[0055] like Figures 1 to 10As shown, with respect to the vertebral stent delivery device of this embodiment, the present invention discloses a vertebral stent delivery method. The memory alloy stent 1b is delivered into the spine by the vertebral stent delivery device of this embodiment. The main steps are as follows:

[0056] S0, using a vertebral body shaping tool kit to construct an internal vertebral channel in the human spine; if the human vertebral body collapses severely, that is, the collapse degree is greater than 70%, it is necessary to use a balloon to enter the internal vertebral channel and expand the vertebral body after the internal vertebral channel is constructed; at the same time, the vertebral body stent 1 is placed in ice water. In the ice water environment, the volume of the memory alloy stent 1b shrinks, which is convenient for separation from the tubular shell 1a at a later time;

[0057] S1, moving the push tube 3 out of the accommodating cavity 4 so that the vertebral body support 1 can enter the accommodating cavity 4;

[0058] S2, placing the vertebral body stent 1 from the bullet feeding cavity 5 into the accommodating cavity 4; the vertebral body stent 1 entering the accommodating cavity 4, wherein one end of the memory alloy stent 1b faces the launching hole 7, and the other end of the memory alloy stent 1b faces the pushing tube hole 6;

[0059] S3, the push tube member 3 moves toward the memory alloy bracket 1b, and the gripping portion grips the memory alloy bracket 1b;

[0060] S4, the push tube member 3 is moved to pass through the tubular shell 1a, and the memory alloy bracket 1b is pushed out of the tubular shell 1a by the push tube member 3;

[0061] S5, then move the push tube member 3 toward the launch hole 7, the memory alloy bracket 1b enters the launch hole 7 under the push of the push tube member 3, and the push tube member 3 also enters the launch hole 7;

[0062] S6, driving the push tube 3 to continue moving toward the launch hole 7 until the memory alloy bracket 1b leaves the launch hole 7;

[0063] S7, adjusting the positions of the handheld part 2 and the push tube 3 so that the memory alloy stent 1b enters the internal channel of the vertebral body and reaches a suitable placement position of the memory alloy stent 1b;

[0064] S8, driving the memory alloy support 1b to separate from the grasping part, the memory alloy support 1b is located in the spine, and the memory alloy support 1b is deformed by the human body temperature, and the memory alloy support 1b expands and supports the spine;

[0065] S9, driving the tube pusher 3 to move toward the tube pusher hole 6, and the tube pusher 3 returns to the tube pusher hole 6;

[0066] S10, moving the tubular shell 1a out of the accommodating chamber 4;

[0067] S11, when it is necessary to deploy several memory alloy brackets 1b, repeat S2-S10 until all memory alloy brackets 1b are deployed;

[0068] S12, driving the handheld part 2 to leave the human body.

[0069] The above vertebral stent delivery method is an operation method for the vertebral stent delivery device of this embodiment. In other embodiments, a cold pipe can be installed in the push tube 3, and the cold pipe is connected to the gripping part. The cold air of the cold pipe can be transmitted to the memory alloy stent 1b through the gripping part, so the memory alloy stent 1b can always remain in a contracted state before the delivery is completed. Therefore, in the vertebral stent delivery method of the vertebral stent delivery device with a cold pipe, it is not necessary to place the vertebral stent 1 in ice water in advance.

[0070] In this embodiment, if Figure 3 and Fig. 9 As shown, the vertebral stent delivery device of the present invention further includes a positioning tube 16 connected to the handheld part 2, the positioning tube 16 is connected to the launch hole 7, the aperture of the positioning tube 16 is greater than or equal to the aperture of the launch hole 7, and the outer diameter of the positioning tube is smaller than the outer diameter of the handheld part 2. During use of the vertebral stent delivery device of the present invention, the positioning tube 16 is first inserted into the human body, and when the push tube member 3 pushes the memory alloy stent 1b to leave the launch hole 7, the push tube member 3 and the memory alloy stent 1b both enter the positioning tube 16. Move the positioning tube 16 into the internal channel of the vertebral body, and then move the push tube member 3 so that the memory alloy stent 1b extends out of the positioning tube 16, that is, the memory alloy stent 1b enters the human spine. Adjust the handheld part 2 and the push tube member 3, and when the memory alloy stent 1b is adjusted to a suitable position, drive the gripping part to separate from the memory alloy stent 1b. The present invention prevents the memory alloy stent 1b from contacting other tissues in the human body except the spine during the process of the memory alloy stent 1b entering the internal channel of the vertebral body through the setting of the positioning tube 16, causing damage to other tissues. Meanwhile, the positioning tube 16 with a smaller outer diameter helps to reduce the size of the surgical incision. In other embodiments, in order to reduce the cost and the volume of the vertebral stent delivery device, the positioning tube 16 may not be provided.

[0071] In this embodiment, if Figure 3 , Figure 7 , Figures 9 to 11As shown, the push tube member 3 includes an outer push tube 3a, an inner push tube 3b arranged in the outer push tube 3a, and a gripping portion is arranged at one end of the inner push tube 3b facing the accommodating chamber 4, and the gripping portion can enter the outer push tube 3a. At the same time, the outer diameter of the outer push tube 3a is smaller than the outer diameter of the memory alloy support 1b. In the vertebral support delivery device of the present invention, when it is necessary to make the gripping portion grip the memory alloy support 1b, the inner push tube 3b is extended out of the outer push tube 3a, and the gripping portion also extends out of the outer push tube 3a. After the gripping portion grips the memory alloy support 1b, the outer push tube 3a and the inner push tube 3b are moved together toward the direction of the launch hole 7. Then the outer push tube 3a and the inner push tube 3b pass through the tubular shell 1a together, and the memory alloy support 1b leaves the tubular shell 1a. Then, the memory alloy support 1b, the gripping portion, the outer push tube 3a and the inner push tube 3b are moved together to pass through the launch hole 7 and the positioning tube 16 in sequence. When the memory alloy support 1b reaches the appropriate surgical position in the internal channel of the vertebral body, the inner push tube 3b is moved relative to the outer push tube 3a toward the accommodating cavity 4, the gripping portion enters the outer push tube 3a, and the memory alloy support 1b abuts against the wall of the outer push tube 3a. As the inner push tube 3b continues to move toward the accommodating cavity 4, the gripping portion continues to move toward the accommodating cavity 4. Under the abutment of the outer push tube 3a, the memory alloy support 1b is separated from the gripping portion. The present invention facilitates the separation of the alloy support 1b from the gripping portion by setting the outer push tube 3a of the inner push tube 3b, and the structure is simple. In other embodiments, the push tube member 3 can also adopt an integrally formed rod, and the gripping portion adopts a retractable clamping claw. A rope is provided in the push tube member 3, and the retractable clamping claw is connected to the rope. By controlling the rope, the clamping claw is switched between contraction and opening to achieve the function of grasping or releasing the memory alloy support 1b.

[0072] In this embodiment, if Figure 7 , Figures 9 to 11As shown, the gripping part is an elastic spring 15, and a channel for the spring 15 to enter is provided in the memory alloy bracket 1b. There are a number of springs 15, and each spring 15 is arranged at equal intervals around the axis of the inner push tube 3b. Under normal conditions, the spring 15 is arranged along the axis of the inner push tube 3b. The mobile spring 15 moves toward the memory alloy bracket 1b, the spring 15 contacts the memory alloy bracket 1b, and while the spring 15 enters the channel in the memory alloy bracket 1b, the spring 15 is deformed in the direction away from the axis of the inner push tube 3b, that is, the spring 15 is unfolded in the direction away from the axis of the inner push tube 3b. Since the spring 15 enters the channel in the memory alloy bracket 1b and the spring 15 is deformed, the memory alloy bracket 1b is not easily separated from the spring 15 without external force, and the spring 15 realizes the gripping of the memory alloy bracket 1b. And when it is necessary to separate the spring piece 15 from the memory alloy bracket 1b, the spring piece 15 is moved in a direction away from the memory alloy bracket 1b, and the spring piece 15 leaves the channel in the memory alloy bracket 1b, and the spring piece 15 returns to its original state. The present invention facilitates the gripping of the memory alloy bracket 1b by setting the spring piece 15, and the structure is simple. It is worth noting that a tantalum point can also be set on the spring piece 15. Therefore, during the operation, the position of the tantalum point can be quickly found through X-ray irradiation, and then the position of the memory alloy bracket 1b can be quickly found, and it can be seen from the image transmitted by the X-ray machine whether the memory alloy bracket 1b is separated from the spring piece 15. In other embodiments, a sticky adhesive block can be used instead of the spring piece 15, and a magnet can also be used instead of the spring piece 15.

[0073] In this embodiment, if Figure 7 and Fig.11 As shown, a bell mouth 17 is provided at one end of the outer extension tube 3b facing the accommodating chamber 4, and the opening of the bell mouth 17 is arranged toward the accommodating chamber 4. The bell mouth 17 is arranged so that when the spring piece 15 is retracted into the outer extension tube 3a, it plays a guiding role, facilitating the retraction of the spring piece 15. In other embodiments, when the gripping portion does not use the spring piece 15, the bell mouth 17 may not be provided, thereby reducing the manufacturing cost.

[0074] In this embodiment, if Figure 7 As shown, the outer sleeve of the external push tube 3a is provided with a guide ring 18. The outer diameter of the external push tube 3a is smaller than the aperture of the push tube hole 6, and the outer diameter of the guide ring 18 is equal to the aperture of the push tube hole 6. In the present invention, by setting the guide ring 18, when the external push tube 3a moves, the guide ring 18 plays a guiding role, while reducing the contact area between the external push tube 3a and the push tube hole 6, so as to facilitate the movement of the external push tube 3a in the push tube hole 6. In other embodiments, a guide block arranged along the axial direction of the external push tube 3a can be arranged on the external push tube 3a, and a guide groove matched with the guide block can be arranged in the push tube hole 6.

[0075] In this embodiment, a stop ring is provided at one end of the push tube hole 6 located at the handheld portion 2, and the stop ring partially covers the opening of the push tube hole 6. Therefore, the stop ring restricts the guide ring 18 from leaving the push tube hole 6 from the end of the push tube hole 6 located at the handheld portion 2, thereby preventing the push tube member 3 from escaping from the push tube hole 6. The present invention prevents the push tube member 3 from escaping from the push tube hole 6 during the process of the push tube member 3 moving in a direction away from the accommodating chamber 4 by setting the stop member. In other embodiments, the stop ring may not be provided.

[0076] In this embodiment, if Figure 5 and Figure 6 As shown, the tube push hole 6 includes a first tube hole 6a and a second tube hole 6b connected to the first tube hole 6a. The first tube hole 6a is connected to the accommodating cavity 4, and the second tube hole 6b extends to the surface of the hand-held portion 2. The first tube hole 6a is arranged along the axial direction of the hand-held portion 2, and the second tube hole 6b is arranged obliquely relative to the first tube hole 6a. The first tube hole 6a and the launching hole 7 are arranged coaxially. The tube push member 3 is located in the first tube hole 6a and the second tube hole 6b. The present invention arranges the first tube hole 6a obliquely relative to the first tube hole 6a so that the portion of the tube push member 3 extending out of the surface of the hand-held portion 2 is inclined with the hand-held portion 2, which facilitates the operator to hold the hand-held portion 2 and the tube push member 3. In other embodiments, such as Fig.12 As shown, the tube pushing hole 6 can also be arranged only along the axial direction of the hand-held part 2, so the tube pushing member 3 and the hand-held part 2 are arranged coaxially.

[0077] In this embodiment, if Figure 3 and Figure 7 As shown, a first handle 19 is provided at one end of the outer push tube 3a away from the accommodating chamber 4, and a second handle 20 is provided at one end of the inner push tube 3b away from the accommodating chamber 4, and the volume of the first handle 19 is greater than the volume of the second handle 20. The present invention facilitates the operation of moving the outer push tube 3a and the inner push tube 3b by providing the first handle 19 and the second handle 20. In other embodiments, a first gripping groove may be provided on the tube wall of the end of the outer push tube 3a away from the accommodating chamber 4, and a second gripping groove may be provided on the end of the inner push tube 3b away from the accommodating chamber 4.

[0078] In this embodiment, if Figures 3 to 6 As shown, the handheld portion 2 is provided with an observation hole 21, and the observation hole 21 is connected to the push tube hole 6. The present invention facilitates observation of the position of the extrapolated push tube 3a in the push tube hole 6 by setting the observation hole 21. In the actual production process of the vertebral stent delivery device, a plurality of scale lines can be added to the outer wall of the handheld portion 2 near the observation hole 21, and a position line can be added to the outer wall of the extrapolated push tube 3a. By judging the position of the scale lines corresponding to the position lines, the position of the extrapolated push tube 3a in the push tube hole 6 can be judged. In other embodiments, a displacement sensor can be set between the handheld portion 2 and the push tube member 3 to judge the position of the push tube member 3.

[0079] In this embodiment, if Figures 6 to 10 As shown, the outer diameter of the shrapnel 15 in the expanded state, the outer diameter of the memory alloy bracket 1b and the outer diameter of the extrapolation tube 3a are all less than or equal to the aperture of the launch hole 7, the outer diameter of the extrapolation tube 3a is less than or equal to the inner diameter of the tubular shell 1a, and the aperture of the launch hole 7 is smaller than the outer diameter of the tubular shell 1a. Therefore, when the push tube 3 pushes the memory alloy bracket 1b into the launch hole 7, the tubular shell 1a is pressed against the tube wall of the launch hole 7 and does not move, so that the memory alloy bracket 1b is separated from the tubular shell 1a. The present invention facilitates the separation of the memory alloy bracket 1b from the tubular shell 1a by defining the relationship between the aperture of the launch hole 7, the outer diameter of the tubular shell 1a and other parameters. In other embodiments, the aperture of the launch hole 7 may also be larger than the outer diameter of the tubular shell 1a, but it is necessary to add a shell fixing mechanism, and the shell fixing mechanism clamps the tubular shell 1a during the separation of the memory alloy bracket 1b from the tubular shell 1a. After the memory alloy support 1b is separated from the tubular cartridge case 1a, the cartridge case fixing mechanism is separated from the tubular cartridge case 1a.

[0080] In this embodiment, if Figure 4 , Fig.13 and Fig.14 As shown, the vertebral stent delivery device of the present invention further includes a blocking mechanism, a bullet delivery cavity 8 arranged on the surface of the handheld portion 2, and the bullet delivery cavity 8 is connected to the accommodating cavity 4. The blocking mechanism is moved, and the blocking mechanism switches between shielding the bullet inlet cavity 5 or shielding the bullet delivery cavity 8. During use of the vertebral stent delivery device of the present invention, specifically in a vertebral stent delivery method disclosed in the present invention, wherein:

[0081] S2, before the vertebral body stent 1 is placed from the bullet-feeding cavity 5 into the accommodating cavity 4, the blocking mechanism is moved so that the blocking mechanism shields the bullet-feeding cavity 8. At this time, the bullet-feeding cavity 5 is connected to the outside, and then the vertebral body stent 1 is placed into the accommodating cavity 4 through the bullet-feeding cavity 5.

[0082] S10, before the tubular shell 1a is moved out of the accommodating chamber 4, the blocking mechanism is moved so that the blocking mechanism covers the bullet inlet chamber 5, and the bullet outlet chamber 8 is connected to the outside; then the tubular shell 1a is moved out of the accommodating chamber 4 from the bullet outlet chamber 8.

[0083] The present invention prevents the tubular shell 1a from entering the accommodating chamber 4 from the bullet feeding chamber 5 and from leaving the accommodating chamber 4 from the bullet feeding chamber 5 by setting the blocking mechanism and the bullet discharging chamber 8. When multiple memory alloy stents 1b need to be placed during spinal surgery, the setting of the bullet discharging chamber 8 facilitates the rapid removal of the tubular shell 1a from the accommodating chamber 4, and several memory alloy stents 1b can be quickly placed. At the same time, due to the setting of the blocking mechanism, the vertebral stent 1 is prevented from rolling out of the bullet discharging chamber 8 during the process of the vertebral stent 1 entering the accommodating chamber 4. It also prevents the vertebral stent 1 containing the alloy stent 1b from entering the accommodating chamber 4 during the process of the tubular shell 1a leaving the accommodating chamber 4 from the bullet discharging chamber 8. In other embodiments, in order to simplify the structure of the handheld portion 2, the blocking mechanism and the bullet discharging chamber 8 may not be set, and the tubular shell 1a enters and exits the accommodating chamber 4 from the bullet feeding chamber 5, thereby reducing the manufacturing cost of the handheld portion 2.

[0084] In this embodiment, if Fig.15 and Fig.16 As shown, the hand-held portion 2 is cylindrical, and the accommodating chamber 4 is located at the axial position of the hand-held portion 2. On the cross section of the hand-held portion 2 having the bullet-feeding chamber 5 and the bullet-discharging chamber 8, the angle between the bullet-feeding chamber 5 and the bullet-discharging chamber 8 is an obtuse angle. When the opening of the bullet-feeding chamber 5 is arranged along the direction of gravity, the vertebral support 1 is loaded into the bullet-feeding chamber 5, and the vertebral support 1 falls from the bullet-feeding chamber 5 into the accommodating chamber 4 under gravity. When the tubular shell 1a needs to leave the accommodating chamber 4, since the bullet-discharging chamber 8 is arranged to be tilted downward along the direction of gravity, the tubular shell 1a can slowly roll out of the hand-held portion 2 from the bullet-discharging chamber 8. The present invention facilitates the loading of the vertebral support 1 and the removal of the tubular shell 1a from the accommodating chamber 4 by limiting the position between the bullet-feeding chamber 5 and the bullet-discharging chamber 8. In other embodiments, in the cross section of the hand-held portion 2 having the bullet inlet cavity 5 and the bullet outlet cavity 8, the angle between the bullet inlet cavity 5 and the bullet outlet cavity 8 may be an acute angle or a right angle. In this structure, when the tubular shell 1a needs to be removed from the accommodating cavity 4, if the opening of the bullet inlet cavity 5 is still arranged along the gravity direction, the tubular shell 1a cannot roll out of the bullet outlet cavity 8 under the action of gravity. In other embodiments, the bullet inlet cavity 5 and the bullet outlet cavity 8 may also be arranged symmetrically with respect to the accommodating cavity 4, but in this case, the volume of the blocking mechanism needs to be larger.

[0085] In this embodiment, if Figures 13 to 17 As shown. The handheld portion 2 is cylindrical, and the blocking mechanism is a rotating member arranged around the outer wall of the handheld portion 2, and the rotating member can rotate around the axis of the handheld portion 2. The rotating member is rotated, and the rotating member shields the bullet inlet chamber 5 or shields the bullet outlet chamber 8. The present invention sets the blocking mechanism as a rotating member, which facilitates rapid switching between shielding the bullet inlet chamber 5 or shielding the bullet outlet chamber 8. In other embodiments, a first gate and a second gate may be respectively provided, the first gate is used to close the bullet inlet chamber 5, and the second gate is used to close the bullet outlet chamber 8, and a first switch plate is provided on the surface of the handheld portion 2, and the first switch plate is pressed, the first gate is opened and the second gate is closed, or the first gate is closed and the second gate is opened.

[0086] In this embodiment, if Figure 4 and Figure 5 , Figures 13 to 17 As shown. The vertebral stent delivery device of the present invention can accommodate multiple vertebral stents 1 at the same time. Among them, the accommodating chamber 4 accommodates one vertebral stent 1, and the bullet feeding chamber 5 accommodates at least one vertebral stent 1. The rotating member includes an arc member 9, a connecting rod 10 arranged on the arc member 9, and a dividing block 11 connected to the connecting rod 10. The dividing block 11 is arc-shaped, and the curvature of the dividing block 11 is the same as the curvature of the tubular shell 1a. The arc member 9 is arranged around the outer wall of the hand-held part 2, and the hand-held part 2 is provided with a clearance hole 12 for the connecting rod 10 to pass through, and the dividing block 11 is arranged in the accommodating chamber 4. The position of the dividing block 11 changes by rotating the arc member 9. When the arc member 9 covers the opening of the bullet feeding chamber 5 located on the surface of the hand-held part 2, the dividing block 11 separates the accommodating chamber 4 and the bullet feeding chamber 5. When the arc member 9 covers the opening of the bullet discharging chamber 8 located on the surface of the hand-held part 2, the dividing block 11 separates the accommodating chamber 4 and the bullet discharging chamber 8.

[0087] During use of the vertebral stent delivery device of the present invention, specifically in a vertebral stent delivery method disclosed in the present invention, wherein:

[0088] S2, before the vertebral support 1 is placed from the bullet-feeding chamber 5 into the accommodating chamber 4, the arc member 9 is rotated, the connecting rod 10 moves in the clearance hole 12, and the partition block 11 moves accordingly. Until the arc member 9 covers the opening of the bullet-discharging chamber 8 located on the surface of the hand-held portion 2, the bullet-feeding chamber 5 is now connected to the outside, and the partition block 11 separates the accommodating chamber 4 and the bullet-feeding chamber 5. Subsequently, several vertebral supports 1 are placed from the bullet-feeding chamber 5, and each vertebral support 1 falls in turn due to gravity, of which only one vertebral support 1 falls into the accommodating chamber 4, and the remaining vertebral supports 1 are arranged in turn in the bullet-feeding chamber 5. At the same time, the partition block 11 separates the bullet-discharging chamber 8 from the accommodating chamber 4. Due to the obstruction of the partition block 11, the vertebral support 1 located in the accommodating chamber 4 cannot enter the bullet-discharging chamber 8.

[0089] S10, before the tubular shell 1a is moved out of the accommodating chamber 4, the arc member 9 is rotated so that the arc member 9 covers the opening of the bullet-intake chamber 5 on the surface of the hand-held portion 2. At this time, the bullet-out chamber 8 is connected to the outside, and the partition block 11 separates the bullet-intake chamber 5 from the accommodating chamber 4. Therefore, the vertebral body support 1 located in the bullet-intake chamber 5 cannot fall into the accommodating chamber 4 due to the obstruction of the partition block 11; and the vertebral body support 1 located in the bullet-intake chamber 5 cannot leave the bullet-intake chamber 5 from the opening of the bullet-intake chamber 5 on the surface of the hand-held portion 2 due to the obstruction of the arc member 9. At the same time, since the accommodating chamber 4 is connected to the bullet-out chamber 8 at this time, and the memory alloy support 1b in the vertebral body support 1 has entered the human body, only the tubular shell 1a is left in the accommodating chamber 4, and the tubular shell 1a can roll out of the accommodating chamber 4 through the bullet-out chamber 8 and roll out of the hand-held portion 2.

[0090] The present invention can realize the simultaneous loading of multiple vertebral stents 1 by setting components such as arc parts 9 and separators 11, greatly shortening the time interval between the placement of multiple memory alloy stents 1b. In other embodiments, a third gate and a fourth gate can also be set respectively, the third gate is used to separate the bullet inlet chamber 5 and the accommodating chamber 4, and the fourth gate is used to separate the bullet outlet chamber 8 and the accommodating chamber 4, and a second switch plate is set on the surface of the handheld part 2, and the second switch plate is pressed, the third gate is opened and the fourth gate is closed, or the third gate is closed and the fourth gate is opened.

[0091] In this embodiment, if Figure 3 , Figures 13 to 17 As shown, the vertebral stent delivery device of the present invention also includes a magazine member 13 for accommodating the vertebral stent 1. A magazine opening is provided on the magazine member 13, and a bullet feed hole 14 is provided on the arc member 9, and the magazine opening is connected to the bullet feed hole 14. The magazine member 13 and the arc member 9 are detachably connected. Before the operation, the magazine member 13 is first removed from the arc member 9, and a number of vertebral stents 1 are loaded into the magazine member 13. After the vertebral stent 1 is loaded, the magazine member 13 is installed on the arc member 9, and the arc member 9 is rotated so that the bullet feed hole 14 is connected to the bullet feed cavity 5, and part of the vertebral stent 1 in the magazine member 13 falls into the handheld part 2 through the magazine opening and the bullet feed hole 14 under gravity. When a memory alloy stent 1b is delivered, it is necessary to remove the tubular shell 1a from the handheld part 2. The arc member 9 is rotated, and the bullet feed hole 14 is shielded by the outer wall of the handheld part 2. After the removal of the tubular shell 1a is completed, the arc part 9 is rotated again to make the bullet feeding hole 14 communicate with the bullet feeding cavity 5, and a vertebral stent 1 originally located in the bullet feeding cavity 5 falls into the accommodating cavity 4 under gravity, and a vertebral stent 1 falls from the magazine part 13 into the bullet feeding cavity 5. The present invention can continuously deliver a plurality of memory alloy stents 1b through the arrangement of the magazine part 13. And the vertebral stent delivery device of the present invention can be equipped with a plurality of magazine parts 13, and each magazine part 13 is filled with vertebral stents 1 before the operation. Even if the vertebral stent 1 in a magazine part 13 is used up, it is only necessary to quickly replace a new magazine part 13. In other embodiments, when the bullet feeding cavity 5 and the bullet discharge cavity 8 are symmetrically arranged with the accommodating cavity 4 as the center, a magazine strip can be provided to replace the blocking mechanism and the magazine part, and a plurality of loading slots are provided on the magazine strip, each loading slot is used to accommodate the vertebral stent 1, and each loading slot is arranged in sequence along the length direction of the magazine strip. During surgery, the magazine strip filled with vertebral stents 1 is inserted from the bullet feeding chamber 5 until the vertebral stent 1 at one end of the magazine strip enters the accommodating chamber 4. A propulsion device is also provided in the handheld portion 2. When the memory alloy stent 1b in a vertebral stent 1 is released, the propulsion device pushes the magazine strip to move one step toward the bullet discharging chamber 8. At this time, the next vertebral stent 1 is located in the accommodating chamber 4.

[0092] The present invention also discloses a vertebral stent kit, including a vertebral stent delivery device of the present embodiment and a vertebral stent 1 of the present embodiment. During the production process of the vertebral stent kit of the present invention, each vertebral stent kit generally includes a vertebral stent delivery device and a plurality of vertebral stents 1, so that multiple vertebral stents 1 can be implanted into a vertebra during surgery.

[0093] At present, before surgery, the vertebral support 1 is usually soaked in ice water to make the memory alloy support 1b in the vertebral support 1 in a contracted state. However, after the vertebral support 1 is loaded into the accommodating cavity 4, since the temperature of the operating room is relatively warm, usually maintained between 20 degrees Celsius and 30 degrees Celsius, the memory alloy support 1b will be affected by the room temperature and inevitably expand. In order to facilitate the memory alloy support 1b to be smoothly pushed out of the tubular shell 1a by the push rod 3, the strength value of the memory alloy support 1b is set to be less than the strength value of the tubular shell 1a. If the strength value of the memory alloy support 1b is greater than the strength value of the tubular shell 1a, the tubular shell 1a will undergo plastic deformation as the memory alloy support 1b expands, and the expanded memory alloy support 1b will enter the concave pit formed by the plastic deformation of the tubular shell 1a, resulting in the memory alloy support 1b interfering with the tubular shell 1a during the process of being pushed out by the push rod 3, and the memory alloy support 1b is difficult to be pushed out by the push rod 3.

[0094] In this embodiment, if Fig.18 As shown, the memory alloy support 1b is tubular, and a plurality of strip holes 1c are provided on the side wall of the memory alloy support 1b, and the strip holes 1c are arranged in a spiral shape around the axis of the memory alloy support 1b. The present invention provides a plurality of strip holes 1c arranged in a spiral shape on the memory alloy support 1b, so that when the memory alloy support 1b is deployed in the human body, the vertebrae will grow into the memory alloy support 1b from the strip holes 1c, which facilitates the firm combination of the memory alloy support 1b and the human spine. In other embodiments, a plurality of circular holes can be used to replace the plurality of spiral strip holes 1c. Or as Fig.19 As shown, although the memory alloy bracket 1b is tubular, its tube wall adopts bionic design, and the tube structure has several crab claw-like shapes overlapped in sequence. When the memory alloy bracket 1b expands in the vertebral body, the memory alloy bracket 1b has a good supporting effect due to the crab claw-like design.

[0095] In this embodiment, Fig. 20As shown, there are two types of memory alloy stents 1b, namely, a positive spiral stent and a reverse spiral stent. In the positive spiral stent and the reverse spiral stent, the memory alloy stent 1b is a single-layer structure, that is, the memory alloy stent 1b in a single tubular shell 1a is a single-layer structure. The difference between the positive spiral stent and the reverse spiral stent is that in the positive spiral stent and the reverse spiral stent, the spiral directions of the plurality of strip-shaped holes 1c are opposite. There are at least two vertebral stents 1, wherein the positive spiral stent and the reverse spiral stent are each provided with at least one. Usually, the number of positive spiral stents and the reverse spiral stents is the same, or the number of positive spiral stents is one more than the number of reverse spiral stents, or the number of positive spiral stents is one less than the number of reverse spiral stents. During the operation, the vertebral stent 1 equipped with the positive spiral stent and the vertebral stent 1 equipped with the reverse spiral stent are sequentially loaded into the magazine 13, and then the vertebral stent delivery device of the present invention is operated to alternately deliver the positive spiral stent and the reverse spiral stent into the vertebral body in turn, and the positive spiral stent and the reverse spiral stent are delivered in an overlapping manner. The present invention sets two types of memory alloy stents 1b, so that during the operation, a plurality of memory alloy stents 1b can be implanted in the human body by alternating the use of positive spiral stents and reverse spiral stents. The overall outer wall surface is arranged in a mesh shape, which can provide a stronger radial support force and effectively increase the support strength of the memory alloy stent 1b supporting the vertebral body. The overall outer wall surface is arranged in a mesh shape, so that the contact area between the memory alloy stent 1b and the vertebral body is larger. When the memory alloy stent 1b is subjected to external force, the stress distribution in the memory alloy stent 1b is more uniform, which effectively reduces the problem of local stress concentration and maintains the stability of the memory alloy stent 1b.

[0096] In this embodiment, the memory alloy stent 1b has other types of structures besides the single-layer positive spiral stent and the reverse spiral stent. Fig.21 As shown, at least two memory alloy brackets 1b are provided, and each memory alloy bracket 1b is sequentially nested with each other. That is, in a single tubular shell 1a, there are at least two memory alloy brackets 1b, and the memory alloy bracket 1b is multi-layered. The present invention effectively enhances the support strength of the memory alloy bracket 1b in the vertebral body by setting the multi-layer memory alloy bracket 1b. After the memory alloy bracket 1b is implanted in the vertebral body, the amount of bone cement used can be reduced or no bone cement is used.

[0097] In this embodiment, when there are at least two memory alloy supports 1b in a single tubular shell 1a. In adjacent memory alloy supports 1b, the spiral directions of several spiral strip holes 1c are opposite. That is, the outer wall surface of the memory alloy support 1b is mesh-shaped, which effectively increases the support strength of the vertebral body supported by the memory alloy support 1b. This article defines that in a single tubular shell 1a, if the memory alloy support 1b is single-layer, then it is a single-layer implant bullet. This article defines that in a single tubular shell 1a, if the memory alloy support 1b is multi-layer, then the vertebral support 1 is a multi-layer implant bullet. During the operation, only multiple single-layer implant bullets can be used, or only multiple multi-layer implant bullets can be used, or single-layer implant bullets or multi-layer implant bullets can be used in combination. However, no matter how it is used, the spiral directions of the strip holes 1c in adjacent memory alloy supports 1b are opposite.

[0098] In this embodiment, if Fig.21 As shown, in the multi-layer implanted bullet, two different structures can be further divided, which are specifically: two memory alloy brackets 1b are provided in the tubular shell 1a, namely, the inner bracket 1ba and the outer bracket 1bb sleeved on the outside of the inner bracket 1ba. The number of strip holes 1c located on the outer bracket 1bb is greater than the number of strip holes 1c located on the inner bracket 1ba. Or the number of strip holes 1c located on the outer bracket 1bb is less than the number of strip holes 1c located on the inner bracket 1ba. The two different structures are used for two different scenarios respectively. When the number of strip holes 1c located on the outer bracket 1bb is greater than the number of strip holes 1c located on the inner bracket 1ba, due to the large number of strip holes 1c of the outer bracket 1bb, under the same force, the deformation of the outer bracket 1bb is greater than that of the inner bracket 1ba. Therefore, when the inner bracket 1ba and the outer bracket 1bb are implanted into the vertebral body, the deformation of the outer bracket 1bb is larger, which can better fit the complex internal environment of the vertebral body, while the deformation of the inner bracket 1ba is smaller, which effectively plays a supporting role. This structure can be used when the vertebral body collapses less. When the number of strip holes 1c on the outer bracket 1bb is less than the number of strip holes 1c on the inner bracket 1ba, the deformation of the outer bracket 1bb is smaller and the supporting strength is higher. Because the inner bracket 1ba has relatively more strip holes 1c, the inner bracket 1ba can better disperse the force. When the vertebral body collapses significantly, it is necessary to first ensure the supporting force of the memory alloy bracket 1b, so this structure can be used at this time.

[0099] In this embodiment, if Figure 1 and Figure 2As shown, a bullet head 1d is provided at one end of the memory alloy support 1b, and the bullet head 1d at least partially covers an opening at one end of the memory alloy support 1b. A chamfer is provided on the side of the bullet head 1d away from the memory alloy support 1b. The present invention facilitates the memory alloy support 1b to be loaded into the tubular shell 1a during the production process of the vertebral support 1 of the present invention through the provision of the bullet head 1d. In other embodiments, the bullet head 1d may not be provided.

[0100] In this embodiment, along the length direction of the strip hole 1c, each position of the strip hole 1c is provided with a corresponding width value, and when the memory alloy support 1b is in a contracted state, the width value is provided with at least two types. That is, the strip hole 1c is not a regular rectangular shape. When the vertebral body collapses severely, since the memory alloy support 1b is in the shape of a rugby ball after being unfolded in the vertebral body, in order to ensure that the unfolded memory alloy support 1b has sufficient supporting force, the width values ​​at both ends of the strip hole 1c are greater than the width value in the middle, that is, the gaps at both ends of the strip hole 1c are large and the gaps in the middle are small. When the degree of vertebral body collapse is small, it is necessary to ensure that the memory alloy support 1b has good elasticity, and the support force requirements for the memory alloy support 1b are relatively small. Therefore, the width values ​​at both ends of the strip hole 1c are less than the width value in the middle, that is, the gaps at both ends of the strip hole 1c are small and the gaps in the middle are large. The present invention is conducive to better fusion of the memory alloy support 1b with the vertebral body by limiting the shape of the strip hole 1c. In other embodiments, in order to facilitate the production of the memory alloy bracket 1b, the width values ​​of the strip-shaped holes 1c at various locations may also be the same.

[0101] In summary, the present invention makes the vertebral stent delivery device easy to operate and facilitates the accurate and rapid delivery of multiple vertebral stents 1 into the human spine through the arrangement of the handheld part 2 and the push tube 3. In most cases, the use of bone cement can be avoided. And by arranging the vertebral stent 1 to consist of a tubular shell 1a and a memory alloy stent 1b, the surgical wound is reduced by taking advantage of the memory alloy stent 1b; at the same time, the tubular shell 1a protects the memory alloy stent 1b, and the arrangement of the tubular shell 1a facilitates the loading of the vertebral stent 1 into the bullet chamber 5. And by the arrangement of the positioning tube 16, the memory alloy stent 1b is prevented from contacting other tissues in the human body except the spine. And by the arrangement of the outer push tube 3a of the inner push tube 3b, the alloy stent 1b is separated from the gripping part. And by the arrangement of the shrapnel 15, it is convenient to grasp the memory alloy stent 1b, and the structure is simple. And by the arrangement of the horn mouth 17, it plays a guiding role. The guide ring 18 is provided to guide the outer push tube 3a while facilitating the movement of the outer push tube 3a in the push tube hole 6. The position limiter is provided to prevent the push tube member 3 from coming out of the push tube hole 6. The first tube hole 6a is provided to be tilted relative to the first tube hole 6a, so that the operator can hold the push tube 3a. The first handle 19 and the second handle 20 are provided to facilitate the movement of the outer push tube 3a and the inner push tube 3b. The observation hole 21 is provided to facilitate the observation of the position of the outer push tube 3a in the push tube hole 6. The memory alloy support 1b is separated from the tubular shell 1a by defining the relationship between the aperture of the firing hole 7 and the outer diameter of the tubular shell 1a. The blocking mechanism and the bullet discharge chamber 8 are provided to facilitate the rapid removal of the tubular shell 1a from the accommodating chamber 4. The position between the bullet inlet chamber 5 and the bullet discharge chamber 8 is defined to facilitate the loading of the vertebral support 1 and the removal of the tubular shell 1a from the accommodating chamber 4. By setting the blocking mechanism as a rotating part, it is convenient to quickly switch between shielding the inlet chamber 5 or shielding the outlet chamber 8. And by setting the arc part 9, the partition block 11 and other components, the time interval between the delivery of multiple memory alloy brackets 1b is greatly shortened. And by setting the magazine part 13, it is possible to continuously deliver a number of memory alloy brackets 1b. And by setting a number of strip holes 1c, it is convenient for the memory alloy bracket 1b to be firmly combined with the human spine. And by alternating the use of positive spiral brackets and reverse spiral brackets, the support strength of the memory alloy bracket 1b supporting the vertebral body is effectively increased. And by setting the multi-layer memory alloy bracket 1b, the amount of bone cement used can be reduced or bone cement is not used. And by setting the number of strip holes 1c in the outer bracket 1bb and the inner bracket 1ba, it is suitable for different surgical scenarios. By setting the bullet head 1d, it is convenient for the memory alloy bracket 1b to be loaded into the tubular shell 1a. And by limiting the shape of the strip hole 1c, it is conducive to better fusion of the memory alloy bracket 1b with the vertebral body.

[0102] It should be emphasized that the above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A vertebral stent delivery device, used in conjunction with a vertebral stent (1), characterized in that: The vertebral stent delivery device comprises a handheld portion (2) and a push tube member (3); a receiving chamber (4) for receiving the vertebral stent (1) is provided in the handheld portion (2); a bullet feeding chamber (5), a push tube hole (6) and a launching hole (7) are provided on the surface of the handheld portion (2); the bullet feeding chamber (5), the push tube hole (6) and the launching hole (7) are all connected to the receiving chamber (4); the vertebral stent (1) enters the receiving chamber (4) through the bullet feeding chamber (5); the push tube member (3) is located in the push tube hole (6); a gripping portion is provided at one end of the push tube member (3) facing the receiving chamber (4); the push tube member (3) is moved toward the vertebral stent (1), the gripping portion grips the vertebral stent (1), and the push tube member (3) is moved toward the vertebral stent (1); the gripping portion grips the vertebral stent (1), and the push tube member (3) is moved toward the vertebral stent (1). The vertebral support (1) is pushed by a push tube member (3) to pass through the firing hole (7); the vertebral support (1) comprises a tubular shell (1a) and a memory alloy support (1b) arranged in the tubular shell (1a); the push tube member (3) is moved toward the vertebral support (1), the gripping portion grips the memory alloy support (1b), and after the push tube member (3) passes through the tubular shell (1a), the memory alloy support (1b) is pushed to pass through the firing hole (7); the push tube member (3) also comprises a blocking mechanism and a bullet discharge cavity (8) arranged on the surface of the hand-held portion (2), the bullet discharge cavity (8) being connected to the accommodating cavity (4); the blocking mechanism is moved, and the blocking mechanism switches between shielding the bullet feed cavity (5) or the bullet discharge cavity (8).

2. The vertebral stent delivery device according to claim 1, characterized in that: The hand-held portion (2) is cylindrical, and the blocking mechanism is a rotating member arranged around the outer wall of the hand-held portion (2), and the rotating member can rotate around the axis of the hand-held portion (2); when the rotating member is rotated, the rotating member covers the bullet inlet cavity (5) or covers the bullet outlet cavity (8).

3. The vertebral stent delivery device according to claim 2, characterized in that: The accommodating cavity (4) accommodates one vertebral support (1), and the bullet feeding cavity (5) accommodates at least one vertebral support (1); the rotating member comprises an arc member (9), a connecting rod (10) arranged on the arc member (9), and a partition block (11) connected to the connecting rod (10); the arc member (9) is arranged around the outer wall of the hand-held part (2); the hand-held part (2) is provided with a clearance hole (12) for the connecting rod (10) to pass through; and the partition block (11) is arranged in the accommodating cavity (4); the arc member (9) is rotated, and the position of the partition block (11) is adjusted. The position of the bullet feeding chamber (5) is changed, the arc member (9) covers the opening of the bullet feeding chamber (5) located on the surface of the hand-held portion (2), or the arc member (9) covers the opening of the bullet discharging chamber (8) located on the surface of the hand-held portion (2); when the arc member (9) covers the opening of the bullet feeding chamber (5) located on the surface of the hand-held portion (2), the partition block (11) separates the bullet feeding chamber (5) from the accommodating chamber (4); when the arc member (9) covers the opening of the bullet discharging chamber (8) located on the surface of the hand-held portion (2), the partition block (11) separates the bullet discharging chamber (8) from the accommodating chamber (4).

4. The vertebral stent delivery device according to claim 3, characterized in that: It also comprises a magazine piece (13) for accommodating the vertebral support (1), the magazine piece (13) being provided with a magazine opening, the arc piece (9) being provided with a bullet feed hole (14), the magazine opening being in communication with the bullet feed hole (14).

5. The vertebral stent delivery device according to claim 1, characterized in that: The push tube member (3) comprises an outer push tube (3a) and an inner push tube (3b) arranged inside the outer push tube (3a); the gripping portion is arranged at one end of the inner push tube (3b) facing the accommodating cavity (4); and the gripping portion can enter the outer push tube (3a).

6. The vertebral stent delivery device according to claim 5, characterized in that: The gripping portion is a spring sheet (15), and a channel for the spring sheet (15) to enter is provided in the memory alloy bracket (1b); after the spring sheet (15) enters the channel, the spring sheet (15) unfolds in a direction away from the axis of the inner push tube (3b).

7. The vertebral stent delivery device according to claim 1, characterized in that: It also comprises a positioning tube (16) connected to the handheld part (2), the positioning tube (16) being in communication with the emitting hole (7), and the aperture of the positioning tube (16) being greater than or equal to the aperture of the emitting hole (7).

8. A vertebral support kit, characterized in that: It comprises a vertebral stent delivery device and a vertebral stent (1) as claimed in any one of claims 1 to 7.

9. The vertebral support kit according to claim 8, characterized in that: The memory alloy support (1b) is tubular, and a plurality of strip-shaped holes (1c) are provided on the side wall of the memory alloy support (1b), wherein the strip-shaped holes (1c) are sequentially arranged in a spiral shape around the axis of the memory alloy support (1b).

10. The vertebral support kit according to claim 9, characterized in that: The memory alloy stent (1b) is provided with two types, namely a positive spiral stent and a reverse spiral stent; in the positive spiral stent and the reverse spiral stent, the spiral directions of the plurality of spiral strip-shaped holes (1c) are opposite, and the memory alloy stent (1b) is a single-layer structure; at least two vertebral stents (1) are provided, wherein the positive spiral stent and the reverse spiral stent are each provided with at least one.

11. The vertebral body support kit according to claim 9, characterized in that: At least two memory alloy brackets (1b) are provided, and the memory alloy brackets (1b) are mutually sleeved in sequence.

12. The vertebral support kit according to claim 10, characterized in that: In adjacent memory alloy supports (1b), the spiral directions of the plurality of spiral strip-shaped holes (1c) are opposite.

13. The vertebral body support kit according to claim 11, characterized in that: The memory alloy bracket (1b) is provided with two, namely an inner bracket (1ba) and an outer bracket (1bb) sleeved on the outer side of the inner bracket (1ba), and the number of the strip-shaped holes (1c) located on the outer bracket (1bb) is greater than the number of the strip-shaped holes (1c) located on the inner bracket (1ba).

14. The vertebral support kit according to claim 11, characterized in that: The memory alloy bracket (1b) is provided with two, namely an inner bracket (1ba) and an outer bracket (1bb) sleeved on the outer side of the inner bracket (1ba), and the number of the strip-shaped holes (1c) located on the outer bracket (1bb) is less than the number of the strip-shaped holes (1c) located on the inner bracket (1ba).

Images