An adjustable bend medical device and delivery system

Abstract

This invention provides an adjustable bending medical device. The tube body includes an inner layer, a support layer, and an outer layer sequentially arranged from the inside out. An adjusting member and a reinforcing member are disposed between the inner layer and the support layer, both extending along the axial direction of the tube body. The adjusting member includes a main body segment and an adjusting section connected to the distal end of the main body segment. The distal end of the reinforcing member is aligned with the distal end of the main body segment. In a cross-section perpendicular to the central axis of the adjustable bending medical device, the cross-section of the reinforcing member includes an inner line segment adjacent to the adjusting member, the length of which is less than or equal to half the outer perimeter length of the cross-section of the adjusting member. An operating mechanism is connected to the proximal end of the tube body and is connected to the adjusting member to operate the adjusting member.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an adjustable bendable medical device and delivery system. Background Technology

[0002] In the prior art, the unidirectional bending conveyor includes a bending section and a main body section. Both the bending section and the main body section usually have certain bending properties to adapt to the bending of human blood vessels. However, during the bending process of the bending section, the bending stress on the bending section is usually transmitted to the main body section, causing the main body section to easily follow the bending of the bending section and cause arching. This results in a large deviation between the distal end of the bending section and the target position, which is not conducive to the control of bending. Summary of the Invention

[0003] Therefore, it is necessary to provide an adjustable bending medical device that can reduce or avoid hunching.

[0004] This invention provides an adjustable bending medical device. The tube body includes an inner layer, a support layer, and an outer layer sequentially arranged from the inside out. An adjusting member and a reinforcing member are disposed between the inner layer and the support layer, both extending along the axial direction of the tube body. The adjusting member includes a main body segment and an adjusting section connected to the distal end of the main body segment. The distal end of the reinforcing member is aligned with the distal end of the main body segment. In a cross-section perpendicular to the central axis of the adjustable bending medical device, the cross-section of the reinforcing member includes an inner line segment adjacent to the adjusting member, the length of which is less than or equal to half the outer perimeter length of the cross-section of the adjusting member.

[0005] The operating mechanism is connected to the proximal end of the tube body and is connected to the bending member to operate the bending member.

[0006] In some embodiments, the tube body further includes a first sliding tube, which is sleeved outside the bending member.

[0007] In some embodiments, the adjustable medical device includes two reinforcing members; in the circumferential direction of the tube, the two reinforcing members are respectively disposed on both sides of the adjustable member.

[0008] In some embodiments, the thickness of the bending member in the radial direction of the tube body is T1, the thickness of the reinforcing member in the radial direction of the tube body is T2, and T1 is greater than or equal to T2.

[0009] In some embodiments, the reinforcing member is located between the bending member and the inner layer; or the reinforcing member is located between the bending member and the support tube.

[0010] In some embodiments, the tube body further includes a first fastener disposed between the inner layer and the support layer;

[0011] The reinforcing member includes a reinforcing wire, which is fixedly connected to the first fixing member. The reinforcing wire includes a reinforcing section and a distal section connected to the distal end of the reinforcing section. The reinforcing section is located on the proximal side of the first fixing member, and the distal section is located on the distal side of the first fixing member. The length of the distal section is greater than or equal to zero.

[0012] In some embodiments, the reinforcing member further includes a second sliding tube, which is sleeved outside the main body section;

[0013] The reinforcing wire further includes a proximal section connected to the proximal end of the main body section; the proximal section is exposed outside the second sliding tube and is fixedly connected to the outer layer.

[0014] The present invention also provides a delivery system, the delivery system including any of the above-mentioned adjustable medical devices; the delivery system further includes a pushing auxiliary device and a guide wire, the distal end of the guide wire passing through the proximal end of the adjustable medical device and exiting from the distal end of the adjustable medical device; the pushing auxiliary device is detachably connected to the proximal end of the adjustable medical device and is used to push the guide wire.

[0015] In some embodiments, the pushing assist device includes a movable rod and a fixed rod. The movable rod includes a first limiting post and a first guide wire cavity axially penetrating the first limiting post. The fixed rod is detachably connected to the operating mechanism and includes a second limiting post and a second guide wire cavity axially penetrating the second limiting post.

[0016] The first limiting post is inserted from the proximal end of the second guidewire cavity and can move axially along the second guidewire cavity. The first guidewire cavity and the second guidewire cavity are in communication with the inner cavity of the tube body.

[0017] In some embodiments, the movable rod further includes a first cylinder, the first cylinder including a first cavity opening toward the distal end, and the first limiting post being disposed within the first cavity and connected to the proximal bottom of the first cavity;

[0018] The fixing rod also includes a second cylinder, the second cylinder including a second cavity opening towards the proximal end, the second limiting post being disposed in the second cavity and connected to the distal bottom of the second cavity; the first cylinder is inserted into the second cavity from the proximal end, and the second limiting post can move along the first cavity;

[0019] The pushing assist device also includes an elastic element, which is sleeved outside the second limiting post, with the distal end of the elastic element abutting against the distal bottom of the second cavity and the proximal end of the elastic element abutting against the distal end of the first cylinder.

[0020] In some embodiments, the pushing assist device further includes a connector, which includes a first connecting portion and a second connecting portion, wherein the first connecting portion is detachably connected to the operating mechanism and the second connecting portion is detachably connected to the second cylinder.

[0021] In this invention, the main body segments of the reinforcing member and the bending member are arranged side-by-side along the axial direction of the adjustable medical device, with the reinforcing member closely abutting the main body segment to support the main body segment of the bending member. This reduces the impact of stress on the bending side of the bending member on the main body segment, thereby lowering the possibility of the main body segment bending and developing a convex shape. Simultaneously, the reinforcing member does not completely surround the bending member in the radial direction, thus occupying a smaller space in the radial direction of the tube, resulting in a thinner wall thickness for the adjustable medical device.

[0022] The delivery system of the present invention also includes a pushing auxiliary device for pushing the guidewire. With the cooperation of the pushing auxiliary device, the guidewire can pass through the adjustable bending medical device of the present invention more quickly, which facilitates the operation of doctors. Attached Figure Description

[0023] Figure 1 This is a front view of the adjustable bending medical device in Embodiment 1 of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the cross-section at point A in the middle;

[0025] Figure 3 This is a front view of the inner layer, bending member, reinforcing member, and fixing member in Embodiment 1 of the present invention;

[0026] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0027] Figure 4a This is a partial schematic diagram of the cross-section of the tube in other embodiments;

[0028] Figure 5 This is a front view of the reinforcing member (the second sliding tube is transparent) and the fixing member in Embodiment 1 of the present invention;

[0029] Figure 6 for Figure 3 Enlarged view of point C in the middle;

[0030] Figure 7This is a schematic cross-sectional view of the tube in Embodiment 2 of the present invention;

[0031] Figure 8 for Figure 7 Enlarged view at point D;

[0032] Figure 8a This is a partial schematic diagram of the cross-section of the tube in other embodiments;

[0033] Figure 9 This is a front view of the conveying system in Embodiment 3 of the present invention (the moving rods are in their initial state);

[0034] Figure 10 This is a front view of the pushing auxiliary device and the tail connector in Embodiment 3 of the present invention;

[0035] Figure 11 for Figure 10 Sectional view at point E in the middle;

[0036] Figure 12 This is a front view of the conveying system in Embodiment 3 of the present invention (the moving rod is in a compressed state);

[0037] Figure 13 This is a cross-sectional view of the pushing auxiliary device and the tail end connector in another embodiment of the present invention (the clamping part is in the initial state);

[0038] Figure 14 This is a cross-sectional view of the pushing auxiliary device and the tail end connector in other embodiments of the present invention (the clamping part is in a clamping state);

[0039] Figure 15 This is a schematic diagram of the delivery system in Embodiment 4 of the present invention (the portion of the adjustable medical device is made transparent). Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0043] For ease of description, the end closer to the operator is referred to as the proximal end, and the end farther from the operator is referred to as the distal end.

[0044] Example 1

[0045] like Figure 1 As shown, this embodiment provides an adjustable medical device 100, which includes a tube body 110 and an operating mechanism 120; as Figure 2 As shown, the tube body 110 includes an inner layer 111, a support layer 112, and an outer layer 113 sequentially nested from the inside out. In this embodiment, the inner layer 111 is a polytetrafluoroethylene (PTFE) film, the support layer 112 is a braided mesh tube, a cut mesh tube, or a spring tube made of metal, and the outer layer 113 is a nylon elastomer film. In other embodiments, the material of the inner layer can also be polyethylene terephthalate (PET). Of course, the material of the inner layer is not limited to PTFE or PET; other materials that can ensure the smoothness of the inner wall of the inner layer are also acceptable. In other embodiments, the material of the outer layer can also be a polymer such as polyimide, polyetheretherketone, or polyurethane.

[0046] like Figure 2 As shown, a bending member 114 and a reinforcing member 115 are provided between the inner layer 111 and the supporting layer 112, such as... Figure 3 As shown, both the adjusting member 114 and the reinforcing member 115 extend along the axial direction of the tube body 110; the adjusting member 114 includes a main body segment 1141 and an adjusting segment 1142 connected to the distal end of the main body segment 1141; the distal end of the reinforcing member 115 is aligned with the distal end of the main body segment 1141; and on a cross-section perpendicular to the central axis of the adjustable medical device 110, as shown... Figure 4 As shown, the cross-section of the reinforcing member 115 includes an inner line segment 1151 that is close to the bending member 114, and the length of the inner line segment 1151 is less than or equal to half of the outer perimeter length of the cross-section of the bending member 114.

[0047] The operating mechanism 120 is connected to the proximal end of the tube body 110, and is also connected to the bending member 114 to operate the bending member 114. The bending member 114 is axially movable relative to the inner layer 111 and the support tube 112. The distal end of the bending member 114 is fixedly connected to the inner layer 111 and the support tube 112 via a second fixing member 118. Therefore, the operator can drive the main body segment 1141 axially through the operating mechanism 120, thereby pulling the distal end of the tube body 110 to bend the distal end of the tube body 110. In this embodiment, the bending segment 1142 is welded and fixed to the second fixing member 118. The second fixing member 118 is an annular member, which is sleeved on the outer circumferential surface of the inner layer 111. After the outer layer 113 and the inner layer 111 are fused together, the second fixing member 118 is fixed relative to the inner layer 111, the support tube 112, and the outer layer 113. Therefore, the distal end of the bending section 1142 is also fixed relative to the inner layer 111, the support layer 112, and the outer layer 113. Figure 4 As shown, the tube body 110 further includes a first sliding tube 116, which is sleeved outside the bending member 114. The material of the first sliding tube 116 is polytetrafluoroethylene (PTFE). Of course, the material of the first sliding tube 116 is not limited to PTFE; any material that can ensure the smoothness of the inner wall of the first sliding tube 116 is acceptable. It can be understood that when a smooth receiving channel is formed between the inner layer 111 and the support tube 112, the first sliding tube 116 can be omitted. In other embodiments, the first sliding tube is only sleeved on the main body section of the bending member, and the distal end of the bending member is fixedly connected to the inner layer and the support tube.

[0048] In this process, the reinforcing member 115 of this embodiment provides axial support to the main body segment 1141 of the bending member 114, reducing the impact of the stress on the bending side of the bending segment 1142 on the main body segment 1141, thereby reducing the possibility of the main body segment 1141 bending and developing a convex shape as it bends with the bending segment 1142. Simultaneously, the reinforcing member 115 does not completely surround the bending member 114 in the radial direction, therefore the space occupied by the reinforcing member 115 in the radial direction of the tube body 110 is relatively small, resulting in a thinner wall thickness for the tube body 110. Furthermore, the small space occupied by the reinforcing member 114 in the radial direction of the tube body 110 allows the outer periphery of the tube body 110 to remain as cylindrical as possible, which is beneficial for improving the stability of the adjustable medical device 100 during bending.

[0049] like Figure 3 and Figure 4As shown, in this embodiment, the adjustable medical device 100 includes two reinforcing members 115; the two reinforcing members 115 are respectively disposed on both sides of the adjusting member 114 in the circumferential direction of the tube body 110. The thickness of the adjusting member 114 in the radial direction of the tube body 110 is T1, and the thickness of the reinforcing member 115 in the radial direction of the tube body 110 is T2, and T1 is greater than or equal to T2. Therefore, the reinforcing member 115 improves the axial support force of the adjusting member 114 without increasing the radial dimension of the tube body 110.

[0050] like Figure 3 and Figure 4 As shown, the tube body 110 further includes a first fixing member 117, which is disposed between the inner layer 111 and the support layer 112. The reinforcing member 115 includes a reinforcing wire 1152, which is fixedly connected to the first fixing member 117; as shown Figure 5 As shown, the reinforcing wire 1152 includes a reinforcing section 11521 and a distal section connected to the distal end of the reinforcing section 11521. Figure 3 (Not shown in the diagram), the reinforcing section 11521 is located on the proximal side of the first fixing member 117, and the distal section is located on the distal side of the first fixing member 117, with a length greater than or equal to zero. In other words, the first fixing member 117 can be positioned at any location of the reinforcing wire 1152. In this embodiment, the distal end of the reinforcing wire 1152 is fixedly connected to the first fixing member 117 by welding, and the length of the distal section is zero. The connection between the distal end of the reinforcing wire 1152 and the first fixing member 117 also prevents the distal end of the reinforcing wire 1152 from causing damage to the outer layer 113 or inner layer 111 of the tube body 110. In this embodiment, the first fixing member 117 is an annular member, which is sleeved on the outer circumferential surface of the inner layer 111. After the outer layer 113 and the inner layer 111 are fused together, the first fixing member 117 is fixed relative to the inner layer 111, the support tube 112, and the outer layer 113. Therefore, the distal end of the reinforcing wire 1152 is also fixed relative to the inner layer 111, the support layer 112, and the outer layer 113, preventing the reinforcing wire 1152 from sliding as a whole between the inner layer 111 and the support tube 112. The reinforcing wire is made of metal wire, such as nickel-titanium wire or stainless steel wire.

[0051] like Figure 4 and Figure 5As shown, the reinforcing member 115 further includes a second sliding tube 1153, which is sleeved outside the reinforcing section 11521. The material of the second sliding tube 1153 is a polytetrafluoroethylene (PTFE) film. Of course, the material of the second sliding tube 1153 is not limited to PTFE; any material that can ensure the smoothness of the inner wall of the second sliding tube 1153 is acceptable. It can be understood that when a smooth receiving channel is formed between the inner layer 111 and the support tube 112, the second sliding tube 1153 can be omitted.

[0052] like Figure 5 and Figure 6 As shown, the reinforcing wire 1152 further includes a proximal section 11522, which is connected to the proximal end of the reinforcing section 11521. The proximal section 11522 is exposed outside the second sliding tube 1153 and is fixedly connected to the outer layer 113. During the manufacturing of the tube body 110, the tube body 110 is prone to bend towards the side without the bending adjustment member 114 and the reinforcing member 115. Due to the provision of the second sliding tube 1153, the tube body 110 can be straightened by pulling the reinforcing wire 1152, and after adjustment, the proximal section 11522 of the reinforcing wire 1152 is fixedly connected to the inner layer 111 and the outer layer 113.

[0053] The tube body 110 also includes a through hole ( Figure 6 (Not shown in the diagram), the through hole penetrates the wall thickness of the support layer 112 and the outer layer 113. The proximal end of the bending member 114 protrudes from the through hole through the outer peripheral surface of the tube body 110, and the proximal end of the first sliding tube 116 extends to the distal end of the through hole. The proximal end segment 11522 is located on the proximal end side of the through hole, thereby preventing the portion of the bending member 114 protruding from the first sliding tube 116 from being fixed to the outer layer 113 and / or the inner layer 111 after the proximal end segment 11522 is fused with the inner layer 111 and the outer layer 113 or during the fusion process, thus preventing the bending member 114 from being unable to move relative to the first sliding tube 116. After the proximal end of the bending member 114 protrudes from the tube body 110, it is fixedly connected to the operating mechanism 120. In addition, since the steps of straightening the tube body 110 and fixing the proximal end section 11522 are performed after the proximal end of the bending member 114 passes through the tube body 110, and the proximal end section 11522 is located on the proximal side of the through hole, the impact of this step on the structural stability of the bending member 114 can be avoided.

[0054] In other embodiments, such as Figure 4aAs shown, the tube body includes a third sliding tube 119a, which is sleeved outside the reinforcing wire 1152a and the bending member 114a. Both the reinforcing wire 1152a and the bending member 114a can slide axially along the third sliding tube 119a. The use of only the third sliding tube 119a, without the first and second sliding tubes, helps to further reduce the space occupied by the reinforcing member and the bending member between the inner layer and the support tube.

[0055] Example 2

[0056] The adjustable bendable medical device in this embodiment has a basically the same structure as the adjustable bendable medical device 100 in Embodiment 1, the main difference being that, Figure 7 and Figure 8 As shown, in this embodiment, the reinforcing member 215 of the adjustable medical device is located between the adjusting member 214 and the inner layer 211. The cross-section of the reinforcing member 215 can be rectangular, fan-shaped, or semi-circular. Figure 8 As shown, the reinforcing member 215 has a semi-annular cross-section and is arranged around and close to the bending member. The reinforcing member 215 includes an inner line segment 2151 that is close to the bending member 214, and the length of the inner line segment 2151 is less than half the outer perimeter of the bending member 214. Therefore, the bending member 214 can be directly placed into the area enclosed by the reinforcing member 215 without having to pass through the end of the reinforcing member 215. This is because if the bending member 214 were to pass through the end of the reinforcing member 215, the reinforcing member 215 would need to increase its radial dimension to allow the bending member 214 to pass through smoothly. However, in this embodiment, no gap is needed between the reinforcing member 215 and the bending member 214 for the bending member to pass through the reinforcing member 215, thereby further reducing the thickness of the reinforcing member 215 in the radial direction of the tube body.

[0057] The reinforcing member 215 provides axial support to the main body of the bending member 214, reducing the influence of the stress on the bending side of the bending section on the main body, thereby reducing the possibility of the main body bending and developing a bow shape as the bending section bends.

[0058] In other embodiments, such as Figure 8a As shown, the tube body includes a third sliding tube 219b, which is sleeved outside the reinforcing wire 2152b and the bending member 214b of the reinforcing member. Both the reinforcing wire 2152b and the bending member 214b can slide axially along the third sliding tube 219b. Providing only the third sliding tube 218a helps to further reduce the space occupied by the reinforcing member and the bending member between the inner layer and the support tube, and is particularly beneficial for further reducing the radial dimension occupied by the reinforcing member and the bending member.

[0059] Example 3

[0060] This embodiment provides a conveying system 10, which includes the adjustable bendable medical device described in any one of Embodiment 1 or Embodiment 2. The conveying system 10 of this embodiment is illustrated using the adjustable bendable medical device 100 from Embodiment 1 as an example. Figure 9 As shown, the delivery system 10 of this embodiment also includes a pushing auxiliary device 300 and a guide wire 400. The guide wire 400 enters from the proximal end of the adjustable medical device 100 and exits from the distal end of the adjustable medical device 100. The pushing auxiliary device 300 is connected to the proximal end of the adjustable medical device 100 and is used to push the guide wire 400.

[0061] Therefore, compared to existing adjustable medical devices, the distal portion of the tube 110 of the present invention can be made of a material or structure with greater hardness. The outer layer hardness of the distal portion of the tube 110 can be increased to 40D (Shore D hardness) or higher, and the convexity phenomenon will still not occur. Thus, by increasing the hardness of the distal portion of the tube 110, the strength of the tube 110 is improved, allowing the tube 110 to pass smoothly through narrow and tortuous blood vessels, and improving the stability of the tube 110 after bending. This is because the adjustable medical device 100 of the present invention has a reinforcing member, which increases the axial support force of the tube 110 of the adjustable medical device 100. Even if a greater traction force is applied to the bending member to bend the distal end of the tube 110, the convexity phenomenon of the tube 110 is not likely to occur. However, when the guide wire 400 passes through the bent tube 110 of the present invention, the tube 110 has high stability after bending and is not easy to bounce back as the guide wire 400 is inserted. Therefore, the difficulty of conveying the guide wire 400 increases and the conveying efficiency of the guide wire 400 is low.

[0062] Therefore, as Figure 10 As shown, this embodiment also provides a pushing assistance device 300 for use with the adjustable medical device 100 of the present invention. For example... Figure 11 As shown, the pushing assistance device 300 includes a movable rod 310 and a fixed rod 320. The movable rod 310 includes a first limiting post 311 and a first guide wire cavity 312 axially penetrating the first limiting post 311. The fixed rod 320 is fixedly connected to the operating mechanism 120. The fixed rod 320 includes a second limiting post 321 and a second guide wire cavity 322 axially penetrating the second limiting post 321. The first limiting post 311 is inserted from the proximal end of the second guide wire cavity 322 and can move axially along the second guide wire cavity 322. The first guide wire cavity 312 and the second guide wire cavity 322 are in communication with the inner cavity of the tube body 110.

[0063] In use, the guide wire 400 passes sequentially from the proximal end of the pushing auxiliary device 300 through the first guide wire cavity 312 and the second guide wire cavity 322, and then enters the inner cavity of the tube body 110. For example... Figure 12 As shown, the operator holds the guide wire 400 and presses it against the proximal end of the movable rod 310. When the movable rod 310 is pushed distally relative to the fixed rod 320, the guide wire 400 also moves distally relative to the tube body 110. The movable rod 310 and the fixed rod 320 radially limit the guide wire 400 to prevent it from bending when subjected to axial thrust, thereby allowing the guide wire 400 to move quickly within the tube body 110.

[0064] In this embodiment, the movable rod 310 further includes a first cylindrical body 313, the first cylindrical body 313 including a first cavity 314 opening towards the distal end, and the first limiting post 311 disposed within the first cavity 314 and connected to the proximal bottom of the first cavity 314; the fixed rod 320 further includes a second cylindrical body 323, the second cylindrical body 323 including a second cavity 324 opening towards the proximal end, and the second limiting post 321 disposed within the second cavity 324 and connected to the distal bottom of the second cavity 324; the first cylindrical body 313 is inserted into the second cavity 324 from the proximal end, and the second limiting post 321 can move along the first cavity 314; the pushing auxiliary device 300 further includes an elastic element 330, the elastic element 330 is sleeved outside the second limiting post 321, and the distal end of the elastic element 330 abuts against the distal bottom of the second cavity 324, and the proximal end of the elastic element 330 abuts against the distal end of the first cylindrical body 313.

[0065] By setting the elastic element 330, after the movable rod 310 is pushed a certain distance to the distal end, the operator releases the guide wire 400, and the movable rod 310 resets under the elastic action of the elastic element 300, further improving the pushing efficiency of the guide wire 400.

[0066] like Figure 10 and Figure 11 As shown, the delivery system 10 also includes a tail connector 500, which includes a first connecting part 510 and a second connecting part 520. The first connecting part 510 is detachably connected to the operating mechanism 120 of the adjustable medical device 100, and the second connecting part 520 is detachably connected to the distal end of the pushing auxiliary device 300.

[0067] In other embodiments, such as Figure 13As shown, the proximal end of the first cylindrical body 313c includes a plurality of radial gaps 3131c, which extend radially from the proximal opening of the first guidewire cavity 312c to the outer peripheral edge of the proximal end face of the first cylindrical body 313c. The plurality of radial gaps 3131c are uniformly distributed circumferentially along the first cylindrical body 313c, and the proximal end of the first cylindrical body 313c is divided into a plurality of clamping portions 3132c by the plurality of radial gaps. Figure 14 As shown, the clamping part 3132c can approach the central axis of the first cylinder 313c under radial pressure, thereby clamping the guide wire 400. In this embodiment, the operator can deliver the guide wire 400 to a distal end by squeezing the clamping part 3132c to clamp the guide wire 400 and pushing the first cylinder 313c distally. The first cylinder 313c with this structure further reduces the difficulty of pushing the guide wire 400.

[0068] Example 4

[0069] This embodiment provides a delivery system 20, which includes the adjustable medical device described in any one of Embodiments 1 or 2. The delivery system 10 of this embodiment is illustrated using the adjustable medical device 100 from Embodiment 1 as an example. The delivery system of this embodiment also includes an inner sheath core 600 and an interventional medical device 700, with a receiving gap 610 formed between the inner sheath core 600 and the adjustable medical device 100, within which the interventional medical device 700 can be received. The interventional medical device 700 includes, but is not limited to, cardiac occluders, vascular stents, filters, and vascular plugs.

[0070] In this embodiment, the interventional medical device 700 is housed within the adjustable medical device 100 and enters the human body along with the adjustable medical device 100. The adjustable medical device 100 can smoothly pass through relatively complex blood vessels, thereby successfully delivering the interventional medical device 700 to the affected area.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An adjustable bend medical device, comprising: Includes the pipe body and the operating mechanism; The tube body includes an inner layer, a support layer, and an outer layer sequentially nested from the inside out; an adjusting member and a reinforcing member are provided between the inner layer and the support layer, and both the adjusting member and the reinforcing member extend along the axial direction of the tube body; the adjusting member includes a main body section and an adjusting section connected to the distal end of the main body section; the distal end of the reinforcing member is aligned with the distal end of the main body section; and on a cross-section perpendicular to the central axis of the adjustable medical device, the cross-section of the reinforcing member includes an inner line segment immediately adjacent to the adjusting member, the length of which is less than or equal to half the outer perimeter length of the cross-section of the adjusting member; The operating mechanism is connected to the proximal end of the tube body and is connected to the bending member to operate the bending member.

2. The adjustable bending medical device according to claim 1, characterized in that, The tube body also includes a first sliding tube, which is sleeved outside the bending member.

3. The adjustable bending medical device according to claim 1, characterized in that, The adjustable bending medical device includes two reinforcing members; in the circumferential direction of the tube body, the two reinforcing members are respectively disposed on both sides of the adjustable bending member.

4. The adjustable bending medical device according to claim 2, characterized in that, The thickness of the bending member in the radial direction of the tube body is T1, and the thickness of the reinforcing member in the radial direction of the tube body is T2, and T1 is greater than or equal to T2.

5. The adjustable bending medical device according to claim 1, characterized in that, The reinforcing member is located between the bending member and the inner layer; or the reinforcing member is located between the bending member and the support tube.

6. The adjustable bending medical device according to claim 1, characterized in that, The tube body also includes a first fixing member, which is disposed between the inner layer and the support layer; The reinforcing member includes a reinforcing wire, which is fixedly connected to the first fixing member. The reinforcing wire includes a reinforcing section and a distal section connected to the distal end of the reinforcing section. The reinforcing section is located on the proximal side of the first fixing member, and the distal section is located on the distal side of the first fixing member. The length of the distal section is greater than or equal to zero.

7. The adjustable bending medical device according to claim 6, characterized in that, The reinforcing member also includes a second sliding tube, which is sleeved outside the main body section; The reinforcing wire also includes a proximal section, which is connected to the proximal end of the main body section; the proximal section is exposed outside the second sliding tube and is fixedly connected to the outer layer.

8. A delivery system characterized by, The delivery system includes an adjustable-bend medical device as described in any one of claims 1-7; the delivery system further includes a pushing auxiliary device and a guidewire, the distal end of the guidewire entering from the proximal end of the adjustable-bend medical device and exiting from the distal end of the adjustable-bend medical device; the pushing auxiliary device is detachably connected to the proximal end of the adjustable-bend medical device and is used to push the guidewire.

9. The conveying system according to claim 8, characterized in that, The pushing assist device includes a movable rod and a fixed rod. The movable rod includes a first limiting post and a first guide wire cavity that axially penetrates the first limiting post. The fixed rod is detachably connected to the operating mechanism and includes a second limiting post and a second guide wire cavity that axially penetrates the second limiting post. The first limiting post is inserted from the proximal end of the second guidewire cavity and can move axially along the second guidewire cavity. The first guidewire cavity and the second guidewire cavity are in communication with the inner cavity of the tube body.

10. The conveying system according to claim 9, characterized in that, The movable rod also includes a first cylinder, the first cylinder including a first cavity opening toward the distal end, and the first limiting post being disposed in the first cavity and connected to the proximal bottom of the first cavity; The fixing rod also includes a second cylinder, the second cylinder including a second cavity opening towards the proximal end, and the second limiting post is disposed in the second cavity and connected to the distal bottom of the second cavity; The first cylinder is inserted into the second cavity from the proximal end, and the second limiting post can move along the first cavity; The pushing assist device also includes an elastic element, which is sleeved outside the second limiting post, and The distal end of the elastic element abuts against the distal bottom of the second cavity, and the proximal end of the elastic element abuts against the distal end of the first cylinder.

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