阅读说明：本技术 一种快速释放的血管支架输送系统 (Quick release's vascular stent delivery system ) 是由 方萍 何辉 于 2019-11-06 设计创作，主要内容包括：本发明公开了一种快速释放的血管支架输送系统,属于血管支架输送技术领域。它包括旋转手柄、固定管、后端盖、内螺纹管、活动内筒、三通接头、外鞘管、顶出管、内管、按钮、输液管、弹性定位块；所述旋转手柄一端与固定管活动连接,另一端与后端盖固定,旋转手柄内同轴线固定有内螺纹管。在血管支架释放前期,缓慢转动旋转手柄,驱动活动内筒、外鞘管后退,内管、顶出管将血管支架从外鞘管顶出,确定释放位置准确后,进入后期快速释放阶段,按下按钮并沿固定管滑槽孔向后快速移动,三通接头与活动内筒分离,三通接头和外鞘管快速将血管支架释放,能够大幅缩短手术时间,降低手术风险。(The invention discloses a quick-release intravascular stent conveying system, and belongs to the technical field of intravascular stent conveying. The device comprises a rotating handle, a fixed pipe, a rear end cover, an internal threaded pipe, a movable inner cylinder, a three-way joint, an outer sheath pipe, a top outlet pipe, an inner pipe, a button, a transfusion pipe and an elastic positioning block; one end of the rotating handle is movably connected with the fixed pipe, the other end of the rotating handle is fixed with the rear end cover, and an internal threaded pipe is coaxially fixed in the rotating handle. In the early stage of releasing the vascular stent, the rotating handle is slowly rotated to drive the movable inner cylinder and the outer sheath tube to retreat, the inner tube and the ejection tube eject the vascular stent out of the outer sheath tube, the accurate release position is determined, the vascular stent enters the later stage of quick release, the button is pressed and the vascular stent quickly moves backwards along the sliding groove hole of the fixed tube, the three-way joint is separated from the movable inner cylinder, the vascular stent is quickly released by the three-way joint and the outer sheath tube, the operation time can be greatly shortened, and the operation risk is reduced.)

1. A quick-release intravascular stent conveying system is characterized by comprising a rotary handle, a fixed pipe, a rear end cover, an internal threaded pipe, a movable inner cylinder, a three-way joint, an outer sheath pipe, a top outlet pipe, an inner pipe, a button, a transfusion pipe and an elastic positioning block;

one end of the rotating handle is movably connected with the fixed pipe, the other end of the rotating handle is fixed with the rear end cover, an internal threaded pipe is coaxially fixed in the rotating handle, the inner wall of the internal threaded pipe is provided with a thread groove, and the side surface of the fixed pipe is provided with a fixed pipe sliding groove hole;

the outer side of one end of the movable inner cylinder is provided with a convex tooth, the inner wall of the other end of the movable inner cylinder is provided with a positioning groove, the inner wall of the movable inner cylinder is provided with a pair of slide rail grooves parallel to the axis, the side surface of the movable inner cylinder is provided with a movable inner cylinder slide groove hole corresponding to the fixed pipe slide groove hole, the movable inner cylinder is placed into the fixed pipe, the convex tooth end of the movable inner cylinder is inserted into the internal thread pipe, the convex tooth is matched with the thread groove, the rotating handle and the internal thread pipe rotate together to;

a pair of sliding blocks are arranged on two sides of the three-way joint, the three-way joint is placed in the movable inner cylinder and moves along the sliding rail groove through the sliding blocks, the bottom of the three-way joint is connected with an outer sheath pipe, a side port of the three-way joint is connected with a transfusion pipe, the transfusion pipe extends outwards from the sliding groove hole of the movable inner cylinder and the sliding groove hole of the fixed pipe, an elastic positioning block is arranged on the side surface of the three-way joint and is connected with an external button through the sliding groove hole of the movable inner cylinder and the sliding groove hole of the fixed pipe, when the button is released, the elastic positioning block is clamped in the positioning groove, the three-way joint is fixed with the movable inner cylinder;

one end of the ejection pipe is connected with the rear end cover, the other end of the ejection pipe is inserted into the three-way joint and the outer sheath pipe, a rubber ring sealed with the outer wall of the ejection pipe is arranged in an upper port of the three-way joint, the inner pipe is inserted into the ejection pipe from the rear end cover, a conical head is fixed at the bottom of the inner pipe, a blood vessel support is sleeved on the inner pipe between the conical head and the ejection pipe, and the blood vessel support is collected into the outer sheath pipe by the conical head.

2. The system of claim 1, wherein the resilient positioning block comprises a spring, a positioning block, a guide rod, and a connecting block, the three-way joint has a guide hole and a spring cavity on a side surface, the spring is placed in the spring cavity, the positioning block has a guide rod corresponding to the guide hole, the guide rod of the positioning block is inserted into the guide hole, the positioning block is pushed toward a positioning groove on an inner wall of the movable inner cylinder by the spring in the spring cavity, the connecting block is fixed on the positioning block, the connecting block passes through the sliding groove hole of the movable inner cylinder and the sliding groove hole of the fixed tube to be connected with an external button, when the button is released, the positioning block is clamped into the positioning groove, the three-way joint is fixed with the movable inner cylinder, when the button is pressed, the positioning block is separated from.

3. The system of claim 1, wherein the side of the rotating handle is provided with a handle slot communicating with the fixed tube slot, and one side of the internal threaded tube is provided with a threaded tube slot corresponding to the handle slot.

4. The system of claim 1, wherein the end of the rotating handle is provided with an inward ring of fasteners, the end of the fixed tube is provided with an outward ring of slots, and the end of the rotating handle is engaged with the slots of the fixed tube via the fasteners and is free to rotate.

5. The system of claim 1, wherein the inner wall of the fixed tube has a plurality of guide ribs along the axial direction, the end of the movable inner tube has a disc, and the disc has guide grooves around the circumference thereof for matching with the guide ribs.

6. The system of claim 1, wherein a recovery tube is fixed to the lower end of the ejection tube, the upper end of the recovery tube is fixed to the lower end of the ejection tube, a plurality of raised fixing teeth are arranged outside the orifice of the lower end of the recovery tube, the upper end of the stent is sleeved outside the recovery tube, and the fixing teeth are clamped in the mesh of the stent.

Technical Field

The invention relates to a quick-release intravascular stent delivery system, and belongs to the technical field of intravascular stent delivery.

Background

The application of the blood vessel stent as the current main treatment method of blood vessel stenosis is more and more extensive in clinic. Generally, vascular stents can be classified into laser-cut stents and braided stents according to the processing method. The blood vessel stent delivery system is a delivery system which can deliver blood vessel stents to stenotic lesions and accurately release the blood vessel stents.

At present, the braided stent has better flexibility, can be widely applied by bending a serious blood vessel without causing secondary damage to the blood vessel by folding. Due to its product characteristics, a braided stent must be elongated and placed within a relatively small diameter outer sheath for introduction into a blood vessel during a surgical procedure. During operation, the drug is delivered to a lesion site through the outer sheath and then released to support a blood vessel at a stenosis. However, in order to ensure accurate release of the stent in the current delivery system, the release process of the stent is slow. In the early stage of release of the vascular stent, in order to ensure accurate release position, the release is slow; once the position is confirmed, the later stage can accelerate the release, and the accuracy is not influenced, however, the release speed of the existing conveying system is single, and the release speed cannot be improved in the later stage, so that the operation time is greatly prolonged, and the operation risk is increased.

Therefore, the quick-release intravascular stent delivery system is designed, and the release time of the intravascular stent can be greatly shortened on the premise of ensuring high-precision release so as to reduce the surgical risk.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provides a quick-release blood vessel stent conveying system, which solves the problem that the speed of the prior conveying system for releasing the blood vessel stent is slow.

The technical problem to be solved by the invention is realized by adopting the following technical scheme:

a quick-release blood vessel stent conveying system comprises a rotary handle, a fixed pipe, a rear end cover, an internal threaded pipe, a movable inner cylinder, a three-way joint, an outer sheath pipe, a top outlet pipe, an inner pipe, a button, a transfusion pipe and an elastic positioning block;

one end of the rotating handle is movably connected with the fixed pipe, the other end of the rotating handle is fixed with the rear end cover, an internal threaded pipe is coaxially fixed in the rotating handle, the inner wall of the internal threaded pipe is provided with a thread groove, and the side surface of the fixed pipe is provided with a fixed pipe sliding groove hole;

the outer side of one end of the movable inner cylinder is provided with a convex tooth, the inner wall of the other end of the movable inner cylinder is provided with a positioning groove, the inner wall of the movable inner cylinder is provided with a pair of slide rail grooves parallel to the axis, the side surface of the movable inner cylinder is provided with a movable inner cylinder slide groove hole corresponding to the fixed pipe slide groove hole, the movable inner cylinder is placed into the fixed pipe, the convex tooth end of the movable inner cylinder is inserted into the internal thread pipe, the convex tooth is matched with the thread groove, the rotating handle and the internal thread pipe rotate together to;

a pair of sliding blocks are arranged on two sides of the three-way joint, the three-way joint is placed in the movable inner cylinder and moves along the sliding rail groove through the sliding blocks, the bottom of the three-way joint is connected with an outer sheath pipe, a side port of the three-way joint is connected with a transfusion pipe, the transfusion pipe extends outwards from the sliding groove hole of the movable inner cylinder and the sliding groove hole of the fixed pipe, an elastic positioning block is arranged on the side surface of the three-way joint and is connected with an external button through the sliding groove hole of the movable inner cylinder and the sliding groove hole of the fixed pipe, when the button is released, the elastic positioning block is clamped in the positioning groove, the three-way joint is fixed with the movable inner cylinder;

one end of the ejection pipe is connected with the rear end cover, the other end of the ejection pipe is inserted into the three-way joint and the outer sheath pipe, a rubber ring sealed with the outer wall of the ejection pipe is arranged in an upper port of the three-way joint, the inner pipe is inserted into the ejection pipe from the rear end cover, a conical head is fixed at the bottom of the inner pipe, a blood vessel support is sleeved on the inner pipe between the conical head and the ejection pipe, and the blood vessel support is collected into the outer sheath pipe by the conical head.

As a preferred example, the elastic positioning block is composed of a spring, a positioning block, a guide rod and a connecting block, a guide hole and a spring cavity are formed in the side face of the three-way joint, the spring is placed in the spring cavity, the guide rod corresponding to the guide hole is arranged on the positioning block, the guide rod of the positioning block is inserted into the guide hole, the positioning block is pushed towards a positioning groove in the inner wall of the movable inner cylinder by the spring in the spring cavity, the connecting block is fixed on the positioning block, the connecting block penetrates through a sliding groove hole of the movable inner cylinder and a sliding groove hole of the fixed pipe to be connected with an external button, when the button is released, the positioning block is clamped into the positioning groove, the three-way joint is fixed.

As a preferable example, the side surface of the rotating handle is provided with a handle sliding slot hole communicated with the fixed pipe sliding slot hole, and one side of the internal thread pipe is provided with a thread pipe sliding slot hole corresponding to the handle sliding slot hole.

As a preferable example, the end part of the rotating handle is provided with a circle of inward buckles, the end part of the fixed pipe is provided with a circle of outward clamping grooves, and the end part of the rotating handle is clamped with the clamping grooves of the fixed pipe through the buckles and can rotate freely.

As a preferable example, the inner wall of the fixed pipe is provided with a plurality of guide ribs along the axial direction, the end part of the movable inner cylinder is provided with a disc, and the periphery of the disc is provided with guide grooves matched with the guide ribs.

In a preferred embodiment, a recovery tube is fixed at the lower end of the ejection tube, the upper end of the recovery tube is fixed at the lower end of the ejection tube, a plurality of raised fixing teeth are arranged outside a tube orifice at the lower end of the recovery tube, the upper end of the blood vessel support is sleeved outside the recovery tube, and the fixing teeth are clamped in a mesh of the blood vessel support.

The invention has the beneficial effects that:

(1) in the early stage of releasing the vascular stent, the rotating handle is slowly rotated to drive the movable inner cylinder and the outer sheath tube to retreat, the inner tube and the ejection tube eject the vascular stent out of the outer sheath tube, the accurate release position is determined, the vascular stent enters the later stage of quick release, the button is pressed and quickly moves backwards along the sliding groove hole of the fixed tube, the positioning block is separated from the positioning groove, the three-way joint is separated from the movable inner cylinder, the vascular stent is quickly released by the three-way joint and the outer sheath tube, the later stage can greatly shorten the operation time, and the operation risk is reduced;

(2) the side surface of the rotating handle is provided with a handle sliding groove hole communicated with the fixed pipe sliding groove hole, one side of the internal thread pipe is provided with a threaded pipe sliding groove hole, and when the quick release stroke needs to be further increased, the handle sliding groove hole of the rotating handle is rotated to be aligned with the fixed pipe sliding groove hole, so that a longer vascular stent can be quickly released;

(3) the movable inner cylinder is matched with the guide ribs on the inner wall of the fixed pipe through the disc, and the movable inner cylinder and the fixed pipe do not rotate relatively, so that the movable inner cylinder can run more stably;

(4) the recovery tube is fixed at the lower end of the ejection tube, before the vascular stent is not completely released, if errors occur in the release position, the rotating handle can be rotated reversely, the vascular stent is reversely pulled back into the outer sheath tube through the fixing teeth of the recovery tube, the vascular stent can be released again immediately after being recovered, the operation time is shortened, the current vascular stent release process is generally irreversible, the vascular stent needs to be removed after error, and the recovery tube can reduce the operation difficulty and risk.

Drawings

FIG. 1 is a schematic view of the disassembled structure of each component of the present invention;

FIG. 2 is a schematic view of a connection structure of a rotating handle, a fixed tube and a rear end cap;

FIG. 3 is a partially enlarged schematic view of the joint between the rotary handle and the fixed tube;

FIG. 4 is a schematic view of the connection structure of the rotating handle and the rear end cap;

FIG. 5 is a schematic structural view of an internally threaded tube;

FIG. 6 is a schematic view of the structure in which the internally threaded tube is fixed inside the twist grip;

FIG. 7 is a schematic structural view of the movable inner cylinder;

FIG. 8 is a schematic structural view of the exterior of the movable inner barrel;

FIG. 9 is a schematic structural view of the end of the movable inner cylinder inserted into the internally threaded pipe;

FIG. 10 is a partially enlarged schematic view of the engagement between the teeth on the end of the movable inner cylinder and the thread grooves of the internally threaded tube;

FIG. 11 is a schematic view of the movable inner barrel driving structure;

FIG. 12 is a schematic cross-sectional view of the elastic positioning block and the button on the side of the three-way joint;

FIG. 13 is a schematic view of the external structure of the elastic positioning block and the button on the side of the three-way joint;

FIG. 14 is a schematic cross-sectional view of the movable inner barrel;

FIG. 15 is a schematic cross-sectional view of the stationary tube;

FIG. 16 is a schematic cross-sectional view of the three-way joint, the elastic positioning block, the movable inner cylinder, the fixed tube, and the button;

FIG. 17 is a schematic view of the connection structure of the sheath tube, the ejector tube, the inner tube, and the tee;

FIG. 18 is a schematic view of a seal between the top outlet tube and the upper port of the tee fitting;

FIG. 19 is a schematic view of the end portions of the outer sheath, the top-out tube and the inner tube receiving the stent;

FIG. 20 is a schematic view of the assembled internal structure of the present invention;

fig. 21 is an external structural view after the assembly of the present invention.

In the figure: the device comprises a rotary handle 1, a fixed tube 2, a rear end cover 3, an internal threaded tube 4, a movable inner tube 5, a three-way joint 6, an external sheath tube 7, an ejection tube 8, an inner tube 9, a button 10, a thread groove 11, a fixed tube slide groove hole 12, a convex tooth 13, a positioning groove 14, a slide rail groove 15, a movable inner tube slide groove hole 16, a slide block 17, an infusion tube 18, an elastic positioning block 19, a rubber ring 20, a conical head 21, a blood vessel support 22, a spring 23, a positioning block 24, a guide rod 25, a connecting block 26, a guide hole 27, a spring cavity 28, a handle slide groove hole 29, a thread tube slide groove hole 30, a buckle 31, a clamping groove 32, a guide rib 33, a disc 34, a guide groove 35, a thread gland 36.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the invention easy to understand, the invention is further described with reference to the specific drawings.

In the figure, the delivery system is vertically arranged, so that the lower end and the bottom are referred to as the medical near end and the upper end is referred to as the medical far end, and the inner tube, the top outlet tube and the outer sheath tube in the actual product have longer lengths and are displayed in the same figure for convenience, so that part of the tube body is omitted.

As shown in fig. 1-21, a quick-release blood vessel stent delivery system comprises a rotary handle 1, a fixed tube 2, a rear end cover 3, an internal threaded tube 4, a movable inner cylinder 5, a three-way joint 6, an outer sheath tube 7, an ejection tube 8, an inner tube 9, a button 10, a transfusion tube 18 and an elastic positioning block 19;

as shown in fig. 2-3, one end of the rotary handle 1 is movably connected with the fixed tube 2, the other end is fixed with the rear end cover 3, a circle of inward buckles 31 is arranged at the end of the rotary handle 1, a circle of outward clamping grooves 32 is arranged at the end of the fixed tube 2, and the end of the rotary handle 1 is clamped with the clamping grooves 32 of the fixed tube 2 through the buckles 31 and freely rotates;

as shown in fig. 4-6, an internal threaded tube 4 is coaxially fixed in the rotary handle 1, the two are fixed by screwing or clamping, a thread groove 11 is arranged on the inner wall of the internal threaded tube 4, and a fixed tube sliding groove hole 12 is arranged on the side surface of the fixed tube 2; the side surface of the rotary handle 1 is provided with a handle sliding slot hole 29 communicated with the fixed pipe sliding slot hole 12, and one side of the internal thread pipe 4 is provided with a thread pipe sliding slot hole 30 corresponding to the handle sliding slot hole 29.

As shown in fig. 7-11, the outer side of one end of the movable inner cylinder 5 is provided with a convex tooth 13, the inner wall of the other end is provided with a positioning groove 14, the inner wall of the movable inner cylinder 5 is provided with a pair of slide rail grooves 15 parallel to the axis, the side surface of the movable inner cylinder 5 is provided with a movable inner cylinder slide groove hole 16 corresponding to the fixed tube slide groove hole 12, the movable inner cylinder 5 is placed into the fixed tube 2, the end of the convex tooth 13 of the movable inner cylinder 5 is inserted into the internal threaded tube 4, the convex tooth 13 is matched with the threaded groove 11, the rotating handle 1 and the internal threaded tube 4 rotate together to drive the movable inner cylinder;

as shown in fig. 12-16, a pair of sliders 17 are disposed on two sides of the three-way joint 6, the three-way joint 6 is placed inside the movable inner cylinder 5 and moves along the slide rail groove 15 through the sliders 17, the bottom of the three-way joint 6 is connected with the sheath tube 7, a side port of the three-way joint 6 is connected with the infusion tube 18, the infusion tube 18 extends out of the slide groove hole 16 of the movable inner cylinder and the slide groove hole 12 of the fixed tube, the side of the three-way joint 6 is provided with an elastic positioning block 19, the elastic positioning block 19 is connected with the external button 10 through the slide groove hole 16 of the movable inner cylinder and the slide groove hole 12 of the fixed tube, when the button 10 is released, the elastic positioning block 19 is clamped into the positioning groove 14, the three-way joint 6 is fixed with the movable inner cylinder 5, when;

the elastic positioning block 19 is composed of a spring 23, a positioning block 24, a guide rod 25 and a connecting block 26, a guide hole 27 and a spring cavity 28 are arranged on the side face of the three-way joint 6, the spring 23 is placed in the spring cavity 28, the guide rod 25 corresponding to the guide hole 27 is arranged on the positioning block 24, the guide rod 25 of the positioning block 24 is inserted into the guide hole 27, the positioning block 24 is pushed to the positioning groove 14 on the inner wall of the movable inner cylinder 5 by the spring 23 in the spring cavity 28, the connecting block 26 is fixed on the positioning block 24, the connecting block 26 penetrates through the sliding groove hole 16 of the movable inner cylinder and the sliding groove hole 12 of the fixed pipe to be connected with the external button 10, when the button 10 is released, the positioning block 24 is clamped in the positioning groove 14, the three-way joint 6 is fixed with the movable inner cylinder 5, when.

The inner wall of the fixed pipe 2 is provided with a plurality of guide ribs 33 along the axial direction, the end part of the movable inner cylinder 5 is provided with a disc 34, and the periphery of the disc 34 is provided with guide grooves 35 matched with the guide ribs 33.

As shown in fig. 17-19, one end of the ejector tube 8 is connected to the rear end cap 3, the other end is inserted into the three-way joint 6 and the outer sheath tube 7, a rubber ring 20 sealed with the outer wall of the ejector tube 8 is arranged in the upper port of the three-way joint 6, the rubber ring 20 is fixed in the upper port of the three-way joint 6 in a sealing manner through a screw gland 36, the inner tube 9 is inserted into the ejector tube 8 from the rear end cap 3, a tapered head 21 is fixed at the bottom of the inner tube 9, a blood vessel stent 22 is sleeved on the inner tube 9 between the tapered head 21 and the ejector tube 8, and the tapered head 21 receives the blood vessel stent 22 into the outer sheath. A recovery tube 37 is fixed at the lower end of the top outlet tube 8, the upper end of the recovery tube 37 is fixed at the lower end of the top outlet tube 8, a plurality of raised fixing teeth 38 are arranged on the outer side of the tube orifice at the lower end of the recovery tube 37, the upper end of the blood vessel support 22 is sleeved outside the recovery tube 37, and the fixing teeth 38 are clamped in the mesh holes of the blood vessel support 22.

As shown in fig. 20 and 21, the assembled inner and outer structure of the invention is schematically shown.

The working principle is as follows:

in the early stage of slow release, in the early stage of release of the vascular stent 22, the rotating handle 1 is slowly rotated to drive the movable inner cylinder 5 and the outer sheath tube 7 to retreat, and the inner tube 9 and the ejection tube 8 with fixed positions eject the vascular stent 22 from the outer sheath tube 7;

a later-stage quick release stage, namely after the accurate release position is determined, entering the later-stage quick release stage, pressing the button 10 and quickly moving backwards along the fixed tube sliding groove hole 12, separating the three-way joint 6 from the movable inner cylinder 5 after the positioning block 24 is separated from the positioning groove 14, quickly moving the three-way joint 6 backwards, quickly exposing the vascular stent 22 by the outer sheath tube 7 fixed with the three-way joint 6 and then releasing, and greatly shortening the operation time and reducing the operation risk in the later stage;

the side surface of the rotating handle 1 is provided with a handle sliding slot hole 29 communicated with the fixed tube sliding slot hole 12, one side of the internal thread tube 4 is provided with a threaded tube sliding slot hole 30, and when the quick release stroke needs to be further increased, the handle sliding slot hole 29 of the rotating handle 1 is rotated to be aligned with the fixed tube sliding slot hole 12, so that the long vascular stent 22 can be quickly released; the movable inner cylinder 5 is matched with the guide ribs 33 on the inner wall of the fixed pipe 2 through the disc 34, and the movable inner cylinder 5 and the fixed pipe 2 do not rotate relatively, so that the operation can be more stable; the recovery tube 37 is fixed to the lower end of the ejection tube 8, before the vascular stent 22 is not completely released, if errors occur in the release position, the rotating handle 1 can be rotated reversely, the vascular stent 22 is reversely pulled back into the sheath tube 7 through the fixing teeth 38 of the recovery tube 37, adjustment is made after recovery, the vascular stent can be released again immediately, the operation time is shortened, the release process of the current vascular stent 22 is generally irreversible, the vascular stent needs to be removed through an operation after errors occur, and the recovery tube 37 can reduce the operation difficulty and risks.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.