CN116115402A - Proximal structure of conveyor and conveying system - Google Patents

Abstract

The invention belongs to the technical field of medical devices, and the invention proposes a proximal structure of a conveyor and a delivery system, wherein, the proximal structure of the conveyor includes a conveyor, a proximal piece arranged at the proximal end of the conveyor, and a communication In the catheter of the proximal part, the proximal part is provided with a proximal lumen, the proximal end of the catheter is arranged in the proximal lumen, and the proximal part of the catheter is provided with a A wire is threaded into a guide within the catheter. Through the above technical features of the present invention, the conveyor has the function of replacing the guide wire for the second time. By setting the guide part so that the guide wire can pass through the proximal inner cavity smoothly, the task of replacing the guide wire is completed; secondly, the guide wire is ensured. When entering the catheter, the coating on the surface will not be scratched by the catheter mouth, and the guide wire head will not stand against the gap between the catheter and the proximal lumen, which ensures that the guide wire can smoothly penetrate into the catheter.

Description

Proximal structure and delivery system of a conveyor

technical field

The invention belongs to the technical field of medical devices, and in particular relates to a near-end structure and a delivery system of a delivery device.

Background technique

In recent years, interventional treatment for cardiovascular diseases has become an important means of curing patients. Interventional treatment usually uses stents to treat or alleviate lesions in the human body.

At present, the intraluminal stent products on the market are mainly divided into two categories, namely, vascular stents and non-vascular stents. This type of stent generally uses a compressible stent and compresses it into a hollow sheath tube. Under the monitoring of digital images, the stent compressed in the catheter is sent to the lesion, and then the stent is released and deployed in a certain way, relying on the radial support force of the stent itself and the body's own lumen. The contraction force fixes the stent in a specific position to achieve the purpose of treating or relieving the disease.

During the implantation process of the stent, the stent needs to be transported by using a transporter. First, the implantation track is established through a guide wire, and then the sheath of the preloaded stent delivery device is pushed to the lesion under the guidance of the guide wire.

With the existing conveyors, especially the internal iliac conveyors, doctors need to replace the guide wire through the proximal part of the conveyor under special circumstances, and the second replacement of the guide wire through the conveyor can reduce the operation time and blood loss.

However, the structure of the existing delivery device cannot meet this requirement. Therefore, it is necessary to optimize the inner cavity structure of the delivery device catheter and proximal parts to solve the above problems.

Contents of the invention

The purpose of the present invention is to at least solve the problem of the inconvenience of secondary replacement of the catheter by the conveyor, so that the guide wire can be smoothly inserted into the catheter.

One aspect of the present invention proposes a near-end structure of a conveyor, including a proximal part arranged at the proximal end of the conveyor and a conduit connected to the proximal part, wherein the proximal part is provided with The proximal lumen, the proximal end of the catheter is disposed in the proximal lumen, and the proximal end of the catheter is provided with a guide portion for guiding a guide wire to pass into the catheter.

According to the proximal structure of the conveyor of the present invention, by setting the guide part at the proximal end of the catheter, the conveyor has the function of secondary replacement of the guide wire, and by setting the guide part, the guide wire can pass through the proximal lumen smoothly , to complete the task of replacing the guide wire; secondly, to ensure that when the guide wire enters the catheter, the surface coating will not be scratched by the catheter mouth, and the guide wire head will not stand against the gap between the catheter and the proximal lumen , and ensure that the guide wire can be smoothly inserted into the catheter.

In addition, the proximal structure of the conveyor according to the present invention can also have the following additional technical features:

In some embodiments of the present invention, wherein the guide part includes a connecting end connected to the catheter and a flared guide lumen for accommodating a guide wire, the guide lumen is away from the side of the catheter The cross-sectional area is larger than the cross-sectional area of the guide lumen on the side close to the catheter.

In some embodiments of the present invention, wherein, the connecting end is detachably connected to the proximal end of the catheter, and a guiding extension tube is provided between the connecting end and the guiding lumen.

In some embodiments of the present invention, a sealing ring is provided between the connecting end and the guide cavity, and a slit is provided in the middle of the sealing ring to prevent liquid leakage and allow the guide wire to pass through, The guide also includes a piercing guide for expanding the sealing ring.

In some embodiments of the present invention, wherein the proximal lumen runs through the proximal piece, the proximal lumen sequentially includes a mounting hole for accommodating the catheter, a guide hole for guiding the guide wire And a circumscribed assembly hole for connecting external elements, the guide part includes a guide lumen arranged at the proximal end of the catheter.

In some embodiments of the present invention, a stepped surface is provided at the end connecting the installation hole and the guide hole, and the cross-sectional area of the end connecting the installation hole is smaller than that of the guide hole. The cross-sectional area of one end of the external mounting hole.

In some embodiments of the present invention, wherein, the other end of the installation hole away from the guide hole is provided with an abutment part, and a resilient part is provided between the abutment part and the guide part, and the resilient part The elastic part is used to drive the guide part to attach to the step surface.

In some embodiments of the present invention, a locking end cap is arranged between the proximal end piece and the catheter, and a sealing member is arranged inside the locking end cap, and the sealing member is used to seal the The gap between the proximal lumen and the catheter.

In some embodiments of the present invention, wherein, one end of the proximal part facing the conveyor is provided with an inner lumen extension, the locking end cap is arranged at the front end of the inner lumen extension, and the sealing A member is disposed between the catheter and the lumen extension.

In some embodiments of the present invention, wherein, the proximal part is provided with an auxiliary threading assembly connected to the proximal lumen, and the auxiliary threading assembly includes an active threading assembly rotatably connected to the proximal part. wheel and a driving member for driving the driving wheel to rotate.

In some embodiments of the present invention, wherein, the auxiliary threading assembly further includes a pressure wheel that is rotatably connected to the proximal member, and a hole for the guide wire to pass is formed between the driving wheel and the pressure wheel. gap.

Another aspect of the present invention also proposes a delivery system, which includes the proximal structure of the delivery device as described in any one of the above items, the front end of the delivery device is provided with a sheath tube, and the catheter communicates with the the sheath.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the conveyor in Embodiment 1 of the present invention;

2 is a schematic diagram of the proximal structure of the conveyor in Embodiment 1 of the present invention;

Figure 3 is an enlarged view of the structure at A of Figure 2 in Embodiment 1 of the present invention;

4 is a schematic diagram of the assembly structure of the catheter and the proximal lumen in Embodiment 1 of the present invention;

5 is a schematic structural view of the proximal structure of the conveyor in Embodiment 2 of the present invention;

Fig. 6 is an enlarged view of the structure at B of Fig. 5 in Embodiment 2 of the present invention;

Fig. 7 is a schematic diagram of the assembly structure of the catheter and the proximal lumen in the second embodiment of the present invention.

Fig. 8 is a schematic diagram of the proximal structure of the conveyor in Embodiment 3 of the present invention.

9 is a schematic structural view of a sealing ring in Embodiment 3 of the present invention;

10 is a schematic diagram of the assembly structure of the guide part and the proximal lumen in Embodiment 3 of the present invention;

Fig. 11 is a schematic diagram of the proximal structure of the conveyor in Embodiment 4 of the present invention;

Fig. 12 is an enlarged view of the structure at C of Fig. 11 in Embodiment 4 of the present invention;

13 is a schematic diagram of the assembly structure of the catheter and the proximal lumen in Embodiment 4 of the present invention;

Fig. 14 is a schematic structural view showing no installation gap between the conduit and the step surface in Embodiment 4 of the present invention;

Fig. 15 is a structural schematic diagram of an installation gap between the conduit and the step surface in Embodiment 4 of the present invention;

Fig. 16 is a schematic diagram of the assembly structure of the catheter and the proximal lumen in Embodiment 5 of the present invention;

17 is a schematic diagram of the assembly structure of the auxiliary threading component and the proximal lumen in Embodiment 6 of the present invention;

Fig. 18 is a schematic diagram of the internal structure of the proximal part in the sixth embodiment of the present invention.

In the accompanying drawings, each label represents as follows:

100, conveyor; 101, TIP head; 102, sheath tube; 103, lock key; 104, snap button; 105, fixed push rod joint; 106, proximal part; 107, locking end cap; 108, catheter; 109 , the main body of the joint; 110, the gland of the joint; 111, the outer shell; 112, the protective cover;

10. Guide wire; 11. Soft head; 20. Proximal inner cavity; 21. Mounting hole; 211. Step surface; 212. Abutting part; 213. Rebound component; 22. Guide hole; 23. External assembly hole; 30. Guide part; 31. Connecting end; 311. Clamping groove; 32. Guide cavity; 33. Guide extension tube; 34. Tapered guide port; 35. Puncture guide; 40. Seal; 401. Insertion Hole; 41, sealing ring; 411, slit; 42, inner cavity extension; 50, auxiliary threading assembly; 51, driving wheel; 52, pressure wheel; 53, hand wheel; 54, locking assembly; 541, fixed Locking hole; 542, latch.

Detailed ways

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

It should be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may also be meant to include the plural forms unless the context clearly dictates otherwise. The terms "comprising", "comprising", "containing" and "having" are inclusive and thus indicate the presence of stated features, steps, operations, elements and/or parts but do not exclude the presence or addition of one or Various other features, steps, operations, elements, components, and/or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is specifically indicated. It should also be understood that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be referred to as These terms are limited. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context.

For the convenience of description, spatial relative terms may be used herein to describe the relationship of one element or feature as shown in the figures with respect to another element or feature, such as "inner", "outer", "inner". ", "Outside", "Below", "Below", "Above", "Above", etc. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

For ease of description, the following description uses the terms "front end" and "proximal end", where "proximal end" refers to the end closer to the operator, "front end" refers to the end farther from the operator, and the phrase "axial direction" , should be understood in this patent as the direction in which the interventional device is pushed and pushed out, and the direction perpendicular to the "axial direction" is defined as the "radial direction".

Embodiment 1, a proximal structure of a transporter, as shown in Figures 1 to 4, includes a sheath tube 102 arranged at the front end of the transporter 100, and a sheath core is arranged in the sheath tube 102, since the sheath core is set on the sheath tube 102, so it is not visible in the figure, the front end of the sheath core is provided with a TIP head 101. The proximal end of the transporter 100 is provided with a proximal part 106 , and the transporter 100 is provided with a driving mechanism capable of driving the sheath tube 102 to move relative to the sheath core. The specific structure of the driving mechanism is not shown in the accompanying drawings. It should be noted that the driving mechanism is not the focus of protection in this application. Any transmission structure that can drive the sheath tube 102 to move can be applied to this application, such as a gear assembly, a pulley assembly wait.

During the interventional operation, when the stent is implanted through the transporter 100, the stent is placed in the gap between the sheath core and the sheath tube 102, and the doctor moves the sheath tube 102 to a predetermined position by operating the transporter 100, and then operates the driving mechanism, The sheath tube 102 is retreated relative to the sheath core, so that the stent is gradually expanded, and the stent is fixed at a predetermined position by virtue of the radial support force of the stent itself and the contraction force of the human lumen itself.

Since many emergencies may occur during the interventional operation, the guide wire 10 needs to be replaced, for example, there is an unsatisfactory position for stent implantation, or for implanting a branch stent, it is necessary to re-pass the guide wire 10 for multiple positioning, Or during the delivery process of implanting the internal iliac stent, the doctor needs to replace the guide wire 10 in other special cases, and so on.

When the existing conveyor 100 needs to replace the guide wire 10, it is usually necessary to withdraw the conveyor 100 from the lumen of the human body, complete the replacement of the guide wire 10 outside the human body, and re-introduce the conveyor 100 into the human body after the replacement of the guide wire 10 is completed lumen. The above method of replacing the guide wire 10 is time-consuming and laborious, and will increase the operation time and blood loss.

In view of the above problems, the present application proposes a structure of a conveyor 100 that can quickly replace the guide wire 10, wherein a proximal lumen 20 is provided inside the proximal part 106, and the proximal lumen 20 is arranged along the axis of the proximal part 106. Through the proximal part 106 in the direction, a catheter 108 is disposed inside the conveyor 100 , one end of the catheter 108 communicates with the sheath 102 , and the other end of the catheter 108 communicates with the proximal lumen 20 .

For the situation in which the guide wire 10 needs to be replaced quickly during the interventional operation, since the proximal lumen 20 is connected to the catheter 108, the doctor can directly extract the guide wire 10 through the proximal part 106, and then insert a new guide wire through the proximal lumen 20. 10 is threaded into the catheter 108. From the above, the doctor does not need to replace the guide wire 10 after removing the conveyor 100 as a whole from the human body lumen, but can directly replace the guide wire 10 through the proximal part 106 during the implantation process, which saves operation time and reduces blood loss .

For the implantation process of the internal iliac stent, since there are curved parts in the iliac artery and branch vessels, when the guide wire 10 establishes the implantation path, the head of the guide wire 10 needs to be bent to adapt to the shape of the blood vessel.

Wherein, in order to facilitate the bending of the head of the guide wire 10, the head of the guide wire 10 is provided with a deformable soft head 11, which is used to facilitate the doctor to bend into different shapes according to actual needs.

However, since there is inevitably a certain gap between the catheter 108 and the proximal lumen 20 , the flexible tip 11 of the guide wire 10 cannot smoothly enter the catheter 108 through the proximal lumen 20 . In this case, the soft tip 11 is easily stuck in the gap between the catheter 108 and the proximal lumen 20, and the doctor needs to try several times to insert the guide wire 10 into the catheter 108. When the guide wire 10 is inserted into the catheter 108 , since the mouth of the catheter 108 is sharp, it is easy to scratch the coating on the surface of the guide wire 10 .

Therefore, as shown in FIG. 4 and FIG. 5 , a guide portion 30 is provided at the proximal end of the catheter 108, and the guide portion 30 is used to guide the guide wire 10 to pass into the catheter 108, thereby eliminating the gap between the catheter 108 and the proximal lumen 20. The effect of the gap between the guide wire 10 when inserted into the catheter 108.

Specifically, in order to allow the guide wire 10 to enter the catheter 108 smoothly through the proximal part 106 of the transporter 100, first, the proximal part 106 of the transporter 100 is optimized, and the proximal lumen 20 is arranged in the proximal part 106, The proximal lumen 20 penetrates the proximal piece 106 in the axial direction, so that the guide wire 10 can directly enter the catheter 108 through the proximal piece 106 .

The proximal lumen 20 of the present application runs through the proximal piece 106 so that the guide wire 10 can directly enter the catheter 108 through the proximal piece 106 . The proximal lumen 20 includes, from the front end to the proximal end, an installation hole 21 for accommodating the catheter 108, a guide hole 22, and an external assembly hole 23 for connecting external components. The installation hole 21 communicates with the external assembly hole 23 through the guide hole 22 , the guide hole 22 is used for the transition between the circumscribed assembly hole 23 and the installation hole 21 , so that the guide wire 10 can smoothly enter the installation hole 21 after being inserted from the circumscribed assembly hole 23 .

In this embodiment, the external assembly hole 23 is a Luer connector assembly hole.

In addition, a guide portion 30 is provided at the proximal end of the catheter 108. The guide portion 30 includes a connection end 31 and a guide cavity 32. The connection end 31 is used to connect with the catheter 108. The guide cavity 32 is flared and used to accommodate the guide cavity. In the wire 10 , the cross-sectional area of the guide lumen 32 away from the catheter 108 is greater than the cross-sectional area of the guide lumen 32 near the catheter 108 .

The maximum outer diameter of the flaring of the guide lumen 32 fits seamlessly with the inner wall of the proximal lumen 20. When the guide wire 10 is inserted into the catheter 108 along the proximal lumen 20, the guide wire 10 can follow the inner wall of the guide lumen 32. Gently slide into the catheter 108 , so as to prevent the head of the guide wire 10 from being stuck in the gap between the catheter 108 and the proximal lumen 20 or the mouth of the catheter 108 from scratching the coating on the surface of the guide wire 10 .

In this embodiment, the connecting end 31 and the conduit 108 are integrally formed. During the manufacturing process of the catheter 108 , the catheter 108 is flared to form a connecting end 31 and a flared guide cavity 32 .

In another embodiment, the proximal lumen 20 may further include a mounting hole 21 and a circumscribing assembly hole 23 , and the diameter of the mounting hole 21 is equal to that of the circumscribing mounting hole 23 , so there is no need to provide a guide hole 22 for transition.

In this embodiment, a sealing ring 41 is provided between the connecting end 31 and the guiding cavity 32 , and a slit 411 is provided in the middle of the sealing ring 41 to prevent liquid leakage and allow the guide wire 10 to pass through. Since the guide wire 10 transmits the delivery device 100, there will be blood flowing out from the catheter 108 through the proximal end of the transfer device 100. In order to reduce the amount of bleeding of the patient, the guide part 30 is provided with a two-way penetrable sealing ring 41, and the guide wire 10 passes through the delivery device 100. The slit 411 penetrates into the conduit 108 .

One end of the proximal part 106 facing the conveyor 100 is provided with a lumen extension 42 for assembling the catheter 108, the lumen extension 42 goes deep into the conveyor 100, and a locking end cap 107 is arranged between the proximal part 106 and the catheter 108 , the sealing member 40 is arranged inside the locking end cap 107 .

Wherein, the locking end cap 107 is sleeved on the front end of the inner cavity extension 42, and the middle part of the locking end cap 107 is provided with an insertion hole 401, and the conduit 108 passes through the insertion hole 401 in the middle part of the locking end cap 107, The conduit 108 is radially positioned by locking the end cap 107 to prevent the conduit 108 from shaking in the radial direction. The seal 40 is disposed between the catheter 108 and the lumen extension 42 , and the seal 40 is used to seal the gap between the proximal lumen 20 and the catheter 108 to prevent blood leakage.

According to the proximal structure of the conveyor 100 of the present invention, by setting the guide part 30 at the proximal end of the catheter 108, the conveyor 100 has the function of secondary replacement of the guide wire 10. By setting the guide part 30, the guide wire 10 The task of replacing the guide wire 10 can be successfully passed through the proximal lumen 20; secondly, when the guide wire 10 enters the catheter 108, the coating on the surface will not be scratched by the catheter 108, and the head of the guide wire 10 will not The top is located in the gap between the catheter 108 and the proximal lumen 20 , and ensures that the guide wire 10 can pass through the catheter 108 smoothly.

Embodiment 2. Embodiment 2 of the present application provides a proximal structure of a conveyor. Please refer to FIG. 5 and FIG. 8 . The difference of the first embodiment is that the guide part 30 is a separate component, the guide part 30 is connected to the conduit 108 through the connection end 31, and the connection end 31 is connected to the conduit 108 by means of welding, bonding or clamping. Fixed connection.

An engaging groove 311 is disposed on the inner side of the connecting end portion 31 , and the engaging groove 311 is engaged and connected to the proximal end portion of the catheter 108 . The clamping groove 311 and the conduit 108 can be tightly connected by interference fit, or strengthened and fixed by welding or bonding.

Wherein, the engaging groove 311 is used as a positioning structure of the guide part 30 and the conduit 108 , so that the assembly of the guide part 30 and the conduit 108 has higher precision. In other embodiments, when welding or bonding is adopted, the clamping groove 311 may also be omitted, and the guide part 30 and the conduit 108 are directly positioned by a processing jig to ensure processing accuracy.

In this embodiment, after the guiding part 30 is engaged and positioned with the catheter 108 through the engaging groove 311, the guiding part 30 and the catheter 108 are fixedly connected together by laser welding, and the maximum outer diameter of the flared opening of the guiding cavity 32 is the same as The inner wall of the proximal lumen 20 is seamlessly fitted without gaps and steps, so that the guide wire 10 can enter the catheter 108 smoothly.

Since the catheter 108 is an elongated tubular part, and the catheter 108 is usually made of metal, when the guide part 30 is integrally formed with the catheter 108, although the proximal end of the catheter 108 can be formed into a flared shape by secondary processing The guide part 30 has higher requirements on the material of the conduit 108 , and the processing is more difficult, and it is difficult to control the yield rate, so the processing cost is higher.

In this embodiment, the proximal lumen 20 may further include a mounting hole 21 and a circumscribed mounting hole 23 , and the diameter of the mounting hole 21 is equal to the diameter of the circumscribed mounting hole 23 .

In summary, the guide part 30 of this embodiment is a separate component, and the guide part 30 and the catheter 108 are fixed by laser welding, so there is no need for secondary processing of the catheter 108, and the laser welding method is less difficult to process , low cost, suitable for mass production.

Embodiment 3. Embodiment 3 of the present application provides a proximal structure of a conveyor, as shown in FIGS. 8 to 10 . The difference from Embodiment 1 is that the connecting end 31 is detachably connected to the proximal end of the catheter 108 , and a guiding extension tube 33 is provided between the connecting end 31 and the guiding lumen 32 .

In this embodiment, the guide part 30 is used as a separate accessory. When the doctor needs to replace the guide wire 10, it is inserted into the proximal lumen 20 through the external assembly hole 23 of the proximal part 106, and is inserted through the connecting end The temporary assembly of the detachable connection between the part 31 and the proximal end of the catheter 108 is to cooperate with the doctor to realize the temporary replacement requirement of the guide wire 10 . After the guide wire 10 has been replaced, the guide portion 30 is removed from the proximal piece 106 .

Due to the different assembly depths of the conduits 108 of different conveyors 100, in order to adapt to different types of conveyors 100, the present application adds a guide extension tube 33 between the connecting end 31 and the guide cavity 32, thereby increasing the overall length of the guide part 30. The length is such that the guide part 30 can be adapted to different types of conveyors 100 .

The difference between the third embodiment and the first embodiment lies in that the sealing ring 41 is arranged between the guiding extension tube 33 and the guiding cavity 32 . Since the sealing ring 41 needs to meet the two requirements of sealing and bidirectional passage of the guide wire 10 , the thickness of the central area of the sealing ring 41 is smaller than the thickness of the peripheral area of the sealing ring 41 . By reducing the thickness of the central area of the sealing ring 41 , the friction force when the guide wire 10 passes through the sealing ring 41 is reduced, so that the guide wire 10 can pass through the sealing ring 41 more easily.

Wherein, the slits 411 of the sealing ring 41 include straight slits 411 , cross-shaped slits 411 and rice-shaped slits 411 . In this embodiment, the cross-shaped slit 411 is selected. On the one hand, the cross-shaped slit 411 ensures the sealing performance, and on the other hand, it facilitates the penetration of the guide wire 10 .

As shown in FIG. 10 , the guide part 30 further includes a piercing guide 35 for expanding the sealing ring 41 .

For the implantation of the internal iliac stent, since the head of the guide wire 10 needs to be bent, the head of the guide wire 10 is provided with a soft tip 11. Under normal circumstances, the soft tip 11 of the guide wire 10 enters the human body through a catheter 108 . Wherein, the proximal end of the guide wire 10 enters the conveyor 100 through the TIP head 101 of the conveyor 100 , and passes through the proximal part 106 of the conveyor 100 . When the guide wire 10 enters the proximal lumen 20 through the catheter 108, since the proximal end of the guide wire 10 is a hard end, the proximal part 106 can be directly passed through the slit 411 in the middle of the sealing ring 41, thereby completing the guide wire 10. Wire 10 pulled out of the job.

However, when the doctor needs to replace the guide wire 10 for the second time, due to the limited hardness of the soft head 11 of the guide wire 10, it is difficult to pass through the sealing ring 41 smoothly, so this embodiment is provided with a puncture guide for expanding the sealing ring 41 35. The puncture guide 35 is a hollow tubular member, the diameter of the front end of the puncture guide 35 is smaller than the diameter of the proximal end of the puncture guide 35, and the front end of the puncture guide 35 is provided with a tapered puncture head.

In this embodiment, the sealing ring 41 is expanded through the puncture guide 35 , and then the guide wire 10 is inserted into the puncture guide 35 , and the guide wire 10 passes through the puncture guide 35 and enters the proximal lumen 20 . The guide wire 10 enters the lumen of the human body through the catheter 108 and the TIP head 101 , thereby completing the work of replacing the guide wire 10 for the second time. Through the above method, the doctor can complete the secondary replacement of the guide wire 10 through the proximal part 106 without withdrawing the transporter 100 from the human lumen, which can effectively reduce the amount of bleeding.

Embodiment 4. Embodiment 4 of the present application provides a proximal structure of a conveyor, as shown in FIGS. 11 to 13 . The difference from Embodiment 1 is that the guide part 30 includes a guide lumen 32 disposed at the proximal end of the catheter 108, wherein the guide lumen 32 of this embodiment is integrally formed on the tapered guide mouth 34 at the proximal end of the catheter 108, and the cone The shaped guide port 34 is shaped by cutting. The end of the installation hole 21 connected to the guide hole 22 is provided with a stepped surface 211 , and the cross-sectional area of the end of the guide hole 22 connected to the installation hole 21 is smaller than the cross-sectional area of the end of the guide hole 22 connected to the external assembly hole 23 .

In the proximal lumen 20, a step surface 211 is provided between the installation hole 21 and the guide hole 22, and the step surface 211 is used to limit the axial displacement of the guide tube 108, when the guide tube 108 is inserted into the bottom of the installation hole 21 , the conduit 108 abuts against the stepped surface 211 . The outer diameter of the conduit 108 is equal to the inner diameter of the installation hole 21 , or the gap between the conduit 108 and the installation hole 21 is less than 1 mm.

The guide hole 22 and the tapered guide port 34 play a guiding role at the same time. The length of the guide hole 22 is at least greater than the length of the external assembly hole 23. Since the length of the present embodiment is greater than the length of the external assembly hole 23, the size of the guide hole 22 is reduced. The inclined angle of the inner wall of the guide wire 10 makes it smoother when the guide wire 10 penetrates into the inner lumen 20 at the proximal end. Moreover, the mouth of the catheter 108 has a tapered guide port 34 , which can eliminate the wall step and transition protection, and prevent the mouth of the catheter 108 from scratching the coating on the surface of the guide wire 10 .

As shown in FIG. 14 , under normal circumstances, the catheter 108 is assembled to the bottom of the mounting hole 21. Since the catheter 108 is directly connected to the guide hole 22, the guide wire 10 can directly enter the catheter 108 through the guide hole 22, thereby completing the replacement of the guide wire. Silk 10 features.

As shown in FIG. 15 , due to the length tolerance of the conduit 108 during manufacture, the conduit 108 may not fit to the bottom of the installation hole 21 during installation. Under the above circumstances, there is a gap between the catheter 108 and the bottom of the installation hole 21 , and after the guide wire 10 passes through the guide hole 22 of the proximal part 106 , it still needs to move a certain distance against the inner wall of the installation hole 21 . Since the mouth of the catheter 108 adopts the setting of the tapered guide port 34 , the guide wire 10 can still smoothly enter the catheter 108 through the installation hole 21 along the tapered guide port 34 , thereby completing the function of replacing the guide wire 10 .

Through the above technical solution, the conveyor 100 has the function of secondary replacement of the guide wire 10, and the gap between the catheter 108 and the proximal lumen 20 is eliminated by setting the guide part 30, so that the guide wire 10 can pass through the proximal end smoothly. end lumen 20 to complete the task of replacing the guide wire 10. Secondly, it is ensured that when the guide wire 10 enters the catheter 108, the coating on the surface will not be scratched by the mouth of the catheter 108, and the head of the guide wire 10 will not be pushed against the gap between the catheter 108 and the proximal lumen 20, ensuring This ensures that the guide wire 10 can be smoothly inserted into the catheter 108. And, by arranging the sealing ring 41 in the guide part 30, it is ensured that when the guide wire 10 passes through the delivery device 100, blood is prevented from flowing out from the catheter 108 through the proximal end of the delivery device 100, and when the guide wire 10 is replaced for the second time , Reduce the outflow of blood and reduce the risk of surgery.

Embodiment 5. Embodiment 5 of the present application provides a proximal structure of a conveyor, as shown in FIG. 16 . The difference is that the other end of the installation hole 21 away from the guide hole 22 is provided with an abutment portion 212, and a resilient member 213 is provided between the abutment portion 212 and the guide portion 30, and the resilient member 213 is used to drive the guide portion. 30 is attached to the stepped surface 211 .

In this embodiment, the abutting portion 212 is integrally formed on the inner wall of the installation hole 21 , the abutting portion 212 protrudes from the inner wall of the installation hole 21 and forms an abutting surface for supporting the resilient member 213 . The resilient component 213 is disposed in the cavity between the abutting portion 212 and the guide portion 30 , and the resilient component 213 may be any component with resilience, such as a spring, an elastic pad, and the like.

In this embodiment, a resilient member 213 is provided between the abutting part 212 and the guide part 30, and the elastic force of the resilient member 213 drives the guide part 30 to be attached to the stepped surface 211, thereby eliminating the difference between the guide part 30 and the stepped surface. The gap between 211 may exist due to assembly tolerance, so that the guide wire 10 will not be stuck in the gap between the guide part 30 and the stepped surface 211 when it is inserted, which further facilitates the insertion of the guide wire 10 into the catheter 108 .

Embodiment 6. Embodiment 6 of the present application provides a proximal structure of the conveyor, as shown in FIG. 17 and FIG. 18 . The similarities between Embodiment 6 of the present application and Embodiment 1 will not be repeated here. The difference from Embodiment 1 is that the proximal member 106 is provided with an auxiliary threading assembly 50, the auxiliary threading assembly 50 communicates with the interior of the proximal lumen 20, and the auxiliary threading assembly 50 includes a rotatably connected The driving wheel 51 of the proximal part 106 , the pressing wheel 52 and the driving member for driving the driving wheel 51 to rotate, a gap for the guide wire 10 to pass is formed between the driving wheel 51 and the pressing wheel 52 .

Wherein, the auxiliary threading assembly 50 is arranged on the proximal side relative to the catheter 108, the auxiliary threading assembly 50 includes a driving wheel 51 and at least one pressing wheel 52, and the driving wheel 51 and the pressing wheel 52 are respectively rotatably connected to the proximal part 106 Inside, a gap is reserved between the driving wheel 51 and the pressure wheel 52 for the guide wire 10 to penetrate, and the pressure wheel 52 is a driven wheel. When the guide wire 10 penetrates into the proximal lumen 20, it first passes through the gap between the driving wheel 51 and the pressure wheel 52, and the driving wheel 51 and the pressure wheel 52 clamp the guide wire 10 in the gap from two directions.

The driving part is arranged outside the proximal part 106. In this embodiment, the driving part is the handwheel 53 that is rotatably connected to the proximal part 106 and axially connected to the driving wheel 51, or other power sources that can drive the driving wheel 51 to rotate. . The doctor can rotate the hand wheel 53 to drive the driving wheel 51 to rotate, and the driving wheel 51 drives the guide wire 10 to move back and forth through friction, thereby realizing the fine adjustment of the position of the guide wire 10 .

In this embodiment, the surfaces of the driving wheel 51 and the pressing wheel 52 have elastic structures, or the driving wheel 51 and the pressing wheel 52 are made of elastic materials, such as rubber. Therefore, the contact surfaces of the driving wheel 51 and the pressure wheel 52 and the guide wire 10 are softly connected, so as to provide protection for the guide wire 10 and prevent the guide wire 10 from being damaged due to extrusion.

In addition, the width of the gap is less than or equal to the diameter of the guide wire 10 . When the width of the gap is smaller than the diameter of the guide wire 10 , the ratio between the width of the gap and the diameter of the guide wire 10 is greater than 0.9 and less than 1.

A locking assembly 54 is also provided between the handwheel 53 and the proximal part 106. The locking assembly 54 includes a fixed locking hole 541 arranged on the proximal part 106, a number of movable locking holes arranged on the handwheel 53, And the pin 542 for passing through the movable locking hole and the fixed locking hole 541 in turn, the movable locking hole is not visible in the figure from the perspective of the accompanying drawings. Among them, several movable locking holes arranged on the handwheel 53 are evenly distributed on the handwheel 53 in the circumferential direction, and penetrate through the handwheel 53 in the axial direction, and each movable locking hole can be aligned with the fixed locking hole 541 . In this embodiment, the hand wheel 53 is provided with 8 movable locking holes uniformly arranged in the axial direction.

When the bolt 542 is withdrawn from the fixed locking hole 541, the driving wheel 51 and the hand wheel 53 are in a state of free rotation. Therefore, the guide wire 10 can be actively moved, and passed through the proximal lumen 20 by driving the driving wheel 51 and the pressure wheel 52 to rotate, and then inserted into the catheter 108; The wire 10 is moved in such a way that the guide wire 10 is passed through the proximal lumen 20 and then inserted into the catheter 108 .

When the latch 542 is inserted into the fixed locking hole 541 through the movable locking hole, the hand wheel 53 cannot rotate relative to the proximal part 106, and the driving wheel 51 remains stationary relative to the proximal part 106. Therefore, the guide wire 10 cannot move relative to the proximal part 106 , so as to realize the positioning of the guide wire 10 .

In other embodiments, the hand wheel 53 may also be provided with scale markings to display the distance that the hand wheel 53 rotates to drive the guide wire 10 to move, so as to provide convenience for doctors to fine-tune the position of the guide wire 10 .

From the above, this embodiment increases the function of the proximal part 106 by setting the auxiliary threading assembly 50 on the proximal part 106, and achieves the purpose of fine-tuning the position of the guide wire 10, and realizes the guide wire through the locking assembly 54. 10. Positioning purposes.

The present application also provides a delivery system, specifically as shown in FIG. 1 , the delivery system includes a delivery device 100 and a guide wire 10 . The delivery device 100 includes the proximal structure of the delivery device 100 as described above, the front end of the delivery device 100 is provided with a sheath tube 102, a sheath core (not shown) is provided in the sheath tube 102, and a TIP is provided at the front end of the sheath core. With the head 101, the guide wire 10 is inserted into the cavity in the sheath core.

The catheter 108 communicates with the sheath tube 102 through the joint body 109, and a driving mechanism (not shown) for driving the sheath tube 102 to move relative to the sheath core is arranged in the transporter 100. The driving mechanism includes a fixed connection with the catheter 108. Fix the push rod joint 105 and the pulley assembly (not shown in the figure). The conveyor 100 includes an outer shell 111 to which the fixed push rod joint 105 is slidably connected.

Wherein, the proximal part 106 is arranged at the tail of the outer casing 111 , and the conduit 108 is inserted into the proximal part 106 through the locking end cap 107 . The front end of the outer shell 111 is provided with a protective sheath 112 , and the sheath 102 passes through the protective sheath 112 and enters the outer shell 111 . The catheter 108 is disposed in the outer casing 111 , the sheath 102 is fixedly connected to the joint body 109 , and the catheter 108 is inserted into the sheath 102 through the joint body 109 , and the catheter 108 communicates with the lumen of the sheath 102 .

The outer casing 111 is provided with a chute (not shown in the figure), the chute is arranged along the length direction of the conveyor 100, the joint body 109 is provided with a joint gland 110, and one end of the joint gland 110 is fixed on the joint body 109 , the other end of the connector gland 110 is slidably connected to the sliding groove. During operation, the sheath tube 102 is driven to move by pushing the joint gland 110 .

The outer casing 111 is provided with a snap button 104 and a lock key 103, and a buckle (not shown in the figure) is arranged on the joint body 109. One end of the snap button 104 is fixedly connected to the outer casing 111, and the other end of the snap button 104 is connected to Snap-fit connection. The locking key 103 is slidably connected to the outer casing 111 , and the locking key 103 is used to drive the buckle to engage or separate from the elastic buckle 104 . When the joint main body 109 is engaged with the spring buckle 104 through the buckle, the joint main body 109 is fixed relative to the outer shell 111 ; when the buckle is separated from the spring buckle 104 , the joint main body 109 can move relative to the outer shell 111 .

When implanting the stent, the guide wire 10 is first sent into the lumen of the human body, an access path is established through the guide wire 10, and then the sheath tube 102 is moved to a predetermined position along the access path established by the guide wire 10, and the stent is placed on the between the sheath core and the sheath tube 102 . When the stent is sent to a predetermined position along with the sheath tube 102 , the doctor unlocks the locking state of the joint body 109 through the locking key 103 , and then pushes the joint gland 110 so that the sheath tube 102 is withdrawn. The stent between the sheath tube 102 and the sheath core is gradually deployed at a predetermined position as the sheath tube 102 is withdrawn, and the stent is fixed at the predetermined position by the radial support force of the stent itself and the contraction force of the human lumen itself.

In summary, the delivery system of the present application has the function of quickly replacing the guide wire 10 by setting the proximal part 106 at the proximal end of the transporter 100, which meets the needs of doctors to replace the guide wire 10 in special cases, and reduces the operation time. and bleeding volume.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (12)

1. A near-end structure of a conveyor, comprising a proximal part arranged at the proximal end of the conveyor and a conduit connected to the proximal part, characterized in that, a proximal inner part is arranged in the proximal part lumen, the proximal end of the catheter is disposed in the proximal lumen, and the proximal end of the catheter is provided with a guiding portion for guiding a guide wire to pass into the catheter. 2. The proximal structure of the conveyor according to claim 1, wherein the guide part includes a connecting end connected to the catheter and a flared guide cavity for accommodating a guide wire, so The cross-sectional area of the guiding lumen on the side away from the catheter is larger than the cross-sectional area on the side of the guiding lumen close to the catheter. 3. The proximal end structure of the conveyor according to claim 2, wherein the connecting end is detachably connected to the proximal end of the catheter, and there is a gap between the connecting end and the guide cavity. Guide the extension tube. 4. The proximal structure of the conveyor according to claim 3, wherein a sealing ring is arranged between the connecting end and the guide cavity, and a sealing ring is provided in the middle of the sealing ring to prevent liquid leakage. And a slit for the guide wire to pass through, the guide part also includes a puncture guide for expanding the sealing ring. 5. The proximal structure of the transporter according to claim 1, wherein the proximal lumen runs through the proximal piece, and the proximal lumen in turn includes a mounting hole for accommodating the catheter , a guide hole for guiding a guide wire and a circumscribing assembly hole for connecting external components, the guide part includes a guide lumen arranged at the proximal end of the catheter. 6. The near-end structure of the conveyor according to claim 5, characterized in that, the end connecting the mounting hole and the guide hole is provided with a stepped surface, and the guide hole is connected to the end of the mounting hole. The cross-sectional area is smaller than the cross-sectional area of one end of the guide hole connected to the circumscribed assembly hole. 7. The proximal structure of the conveyor according to claim 6, characterized in that, the other end of the mounting hole away from the guide hole is provided with an abutment portion, and a gap between the abutment portion and the guide portion A resilient component is provided, and the resilient component is used to drive the guiding portion to attach to the stepped surface. 8. The proximal end structure of the conveyor according to claim 1, wherein a locking end cap is arranged between the proximal end piece and the catheter, and a sealing member is arranged inside the locking end cap, The seal is used to seal a gap between the proximal lumen and the catheter. 9. The proximal structure of the conveyor according to claim 8, characterized in that, one end of the proximal part facing the conveyor is provided with an inner cavity extension, and the locking end cap is arranged in the inner cavity The front end of the lumen extension, the seal is disposed between the catheter and the lumen extension. 10. The proximal end structure of the conveyor according to claim 1, wherein an auxiliary threading assembly connected to the proximal lumen is provided on the proximal end member, and the auxiliary threading assembly includes a rotating The driving wheel connected to the proximal part and the driving part used to drive the driving wheel to rotate. 11. The near-end structure of the conveyor according to claim 10, wherein the auxiliary threading assembly further comprises a pinch wheel rotatably connected to the proximal part, and the drive wheel and the pinch wheel Create a gap for the guide wire to pass through. 12. A delivery system, characterized in that it comprises the proximal structure of the delivery device according to any one of claims 1-10, the front end of the delivery device is provided with a sheath tube, and the catheter communicates with the the sheath.

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