Drainage tube guiding assembly and guiding device

Abstract

The utility model provides a drainage tube guiding assembly and a guiding device. The drainage tube guiding assembly comprises a handle, a drainage tube and a drainage tube, the near end of the guide needle is fixed to the handle, the far end of the guide needle can be arranged in the operation channel of the retraction catheter assembly in a penetrating mode, and the far end of the guide needle can further be arranged in the drainage tube in a penetrating mode; the connecting piece is assembled on at least one of the guide needle and the handle; after the drainage tube is placed in a target position, the drainage tube guiding assembly and the traction catheter assembly can be assembled through the connecting piece and then withdrawn together. The handle and the guide needle are arranged, so that the drainage tube can be prevented from being directly held, and the handle is convenient to hold, so that the drainage tube can conveniently enter the brain to reach a focus part by retracting the catheter assembly; moreover, as the connecting piece and the retraction catheter assembly are connected in an inserted manner and are fixed with each other, the retraction catheter assembly can be withdrawn by withdrawing the drainage tube guide assembly, so that the retraction catheter assembly is convenient to detach and withdraw, and the operation difficulty of puncture catheterization drainage is reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a drainage tube guiding assembly and guiding device. Background Technology

[0002] In related techniques, puncture and drainage generally involves using a retractor to insert the drainage tube. First, a surgical channel is established using the retractor. Then, the drainage tube is held and inserted along the surgical channel to the lesion site. Finally, the retractor is removed, completing the drainage tube placement. During this process, the drainage tube has a relatively small diameter, making it difficult to hold. Furthermore, removing the retractor requires a specific clamping device, making the puncture and drainage procedure quite complex. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a drainage tube guiding component and guiding device, which aims to solve the problem that the operation of puncture and catheter placement drainage is relatively complicated in related technologies.

[0004] To solve the above-mentioned technical problems, the first aspect of this utility model provides a drainage tube guiding assembly, comprising:

[0005] A handle for the user to grip;

[0006] A guide needle, with its proximal end fixed to the handle and its distal end inserted into the surgical channel of the retractor assembly, may also be inserted into a drainage tube to guide the drainage tube into the surgical channel and guide it to the target position; and,

[0007] A connector is fitted onto at least one of the guide needle and the handle, and the connector is adaptable to the proximal end of the retraction catheter assembly.

[0008] After the drainage tube is placed in the target position, the drainage tube guide assembly can be assembled with the retraction catheter assembly and then withdrawn together via the connector.

[0009] Optionally, the connector is elastic and is sleeved on the outside of the guide pin and close to the handle;

[0010] When the connector is inserted into the surgical channel, the connector and the surgical channel are interference-fitted.

[0011] Optionally, the outer side of the connector is provided with a raised rib, which is used to abut against the inner wall of the surgical channel when the connector passes through the surgical channel.

[0012] Optionally, a plurality of raised ribs are provided, and the plurality of raised ribs are distributed at intervals along the length direction of the guide pin.

[0013] Optionally, the raised ribs are sleeved on the outside of the connector, and the diameters of the multiple raised ribs are either the same or gradually varied.

[0014] Optionally, the proximal end of the connector is fixed to the handle, and the distal end is provided with a guide cone surface.

[0015] The second aspect of this utility model provides a guiding device, comprising:

[0016] The catheter assembly is retracted, revealing a through surgical channel;

[0017] A guiding assembly, detachably connected to the retraction catheter assembly, includes a guiding tube that can be inserted into the surgical channel. The guiding tube has a proximal opening and a distal end that is translucent. The distal end of the guiding tube can extend beyond the distal end of the surgical channel. A guiding channel connecting the proximal and distal ends is provided in the middle of the guiding tube, and a visualization device can be inserted within the guiding channel.

[0018] As described in any one of the above-mentioned drainage tube guiding assemblies, the distal end of the guiding needle can be inserted into the surgical channel, and the connector can be adapted and assembled with the proximal end of the retraction catheter assembly.

[0019] Optionally, the guiding assembly further includes a connector detachably connected to the retraction catheter assembly, with the proximal end of the guiding tube fixed to the connector.

[0020] Optionally, the guide tube includes:

[0021] The tube body, with its proximal end fixed to the connecting seat, is provided with the guide channel; and...

[0022] The guide sheath head is fixed to the distal end of the tube body and is light-transmitting. The proximal end of the guide sheath head is open and the distal end is closed to form a receiving cavity. The receiving cavity is connected to the guide channel, and the visualization device can be inserted into the receiving cavity.

[0023] Optionally, the diameter of the guide sheath head is smaller than the diameter of the distal end of the surgical channel.

[0024] Optionally, the retraction catheter assembly includes:

[0025] Fixed base; and,

[0026] A sheath is fixed to the fixing base. The sheath has the surgical channel. The distal end of the guide tube is inserted and assembled to the distal end of the sheath, and the guide tube and the sheath are press-fitted.

[0027] Optionally, the diameter of the sheath is smaller than the diameter of the guide tube.

[0028] Compared with related technologies, the drainage tube guiding assembly and guiding device of this utility model have the following advantages: During the puncture and drainage procedure, the guiding needle is first inserted into the drainage channel of the drainage tube. Then, the handle is held to allow the guiding needle to pass through the surgical channel until the drainage tube moves with the guiding needle, extends out of the surgical channel, and is placed into the lesion site. At this time, the connecting piece and the retractor assembly are assembled and fixed together. The handle and guiding needle can avoid directly holding the drainage tube, and the handle is easy to hold, thus facilitating the drainage tube to enter the brain and reach the lesion site through the retractor assembly. Moreover, when it is necessary to remove the retractor assembly, since the drainage tube guiding assembly is assembled and fixed together with the retractor assembly through the connecting piece, the retractor assembly can be removed by removing the drainage tube guiding assembly, thus facilitating the removal of the retractor assembly and reducing the operational difficulty of the puncture and drainage procedure. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a cross-sectional view of the retraction catheter assembly and drainage tube guide assembly provided in this embodiment of the utility model during assembly;

[0031] Figure 2 yes Figure 1 Enlarged view of detail A in the middle;

[0032] Figure 3 yes Figure 1 A magnified view of detail B in the middle;

[0033] Figure 4 This is a cross-sectional view of the retraction conduit assembly and the guide assembly provided in this embodiment of the utility model during assembly;

[0034] Figure 5 yes Figure 4 Enlarged view of detail C in the middle;

[0035] Figure 6 This is a cross-sectional view of the retraction catheter assembly provided in this embodiment of the utility model;

[0036] Figure 7 This is a schematic diagram of the structure of the drainage tube guiding assembly provided in this embodiment of the utility model;

[0037] Figure 8 This is an assembly diagram of the retraction conduit assembly and the guiding assembly provided in this embodiment of the utility model.

[0038] In the accompanying drawings, the reference numerals indicate:

[0039] 1. Retractor assembly; 11. Fixing base; 111. Flared end; 112. Clamping part; 12. Sheath; 121. Surgical channel; 122. Scale line; 2. Guiding assembly; 21. Guiding tube; 211. Tube body; 2111. Guiding channel; 212. Guide sheath head; 2121. Receptacle; 22. Connecting base; 3. Drainage tube guiding assembly; 31. Handle; 32. Connector; 321. Raised rib; 322. Guide cone surface; 33. Guiding needle; 4. Drainage tube; 5. Spring locking structure. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 utility model.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0043] Example:

[0044] Please see Figures 1 to 8This utility model provides a guiding device, including a retraction catheter assembly 1, a guiding assembly 2, and a drainage tube guiding assembly 3. The retraction catheter assembly 1 has a through surgical channel 121. The guiding assembly 2 is detachably connected to the retraction catheter assembly 1. The distal end of the drainage tube guiding assembly 3 can be inserted into the surgical channel 121, and the drainage tube guiding assembly 3 can be adapted and assembled with the proximal end of the retraction catheter assembly 1. The guiding assembly 2 can assist the retraction catheter assembly 1 in establishing the surgical channel 121 within brain tissue, either visually or non-visually. The drainage tube guiding assembly 3 cooperates with the retraction catheter assembly 1 to allow the drainage tube 4 to be inserted along the surgical channel 121 to the target location; wherein the target location is the lesion site.

[0045] Please see Figure 4 , Figure 6 and Figure 8 The guiding component 2 includes a guiding tube 21 that can be inserted into the surgical channel 121. The guiding tube 21 has a proximal opening and a distal end that is translucent, and the distal end of the guiding tube 21 can extend outside the surgical channel 121. A guiding channel 2111 connecting the proximal and distal ends is provided in the middle of the guiding tube 21. A visualization device can be inserted into the guiding channel 2111 to capture images of the lesion site, thereby enabling simple and quick visualization for the placement of the drainage tube 4. Depending on actual needs, the visualization device can be an endoscope, camera, etc.

[0046] Specifically, the guide tube 21, with an endoscope attached, is first inserted into the patient's brain tissue via the retraction catheter assembly 1. The endoscope can quickly and accurately locate the lesion. Then, the separation guide assembly 2 and the retraction catheter assembly 1 are disassembled, and the guide assembly 2 and the endoscope are removed. At this point, the retraction catheter assembly 1 establishes a surgical channel 121 within the brain tissue. The drainage tube guide assembly 3 is then inserted and fixed together with the drainage tube 4. The drainage tube guide assembly 3 is then inserted into the surgical channel 121 and fixed together with the retraction catheter assembly 1. At this point, the drainage tube 4 is placed into the lesion. Then, the separation drainage tube 4 and the drainage tube guide assembly 3 are disassembled, and the separation drainage tube guide assembly 3 and the retraction catheter assembly 1 are disassembled, thereby removing the drainage tube guide assembly 3 and the retraction catheter assembly 1 and leaving the drainage tube 4 in place, thus completing the placement of the drainage tube 4. The entire puncture and catheterization procedure is visualized, allowing for accurate visualization of the lesion location without blind puncture. The lesion is positioned precisely and in one go, minimizing brain tissue damage and greatly benefiting the surgeon. Furthermore, the removal of the endoscope, guide assembly 2, drainage tube guide assembly 3, and retraction catheter assembly 1 is simple and quick, requiring no multiple people and resulting in lower surgical costs.

[0047] It should be noted that the guide assembly 2 and the retraction catheter assembly 1 are detachably connected, which allows the endoscope to be inserted into the lesion site, while the retraction catheter assembly 1 can be withdrawn together with the guide assembly 2.

[0048] Please see Figure 1 , Figure 2 , Figure 3 and Figure 7 The drainage tube guiding assembly 3 includes a handle 31, a connector 32, and a guide needle 33. The handle 31 is for the user to hold. The proximal end of the guide needle 33 is fixed to the handle 31, and the distal end can be inserted into the surgical channel 121 of the retractor assembly 1. The distal end of the guide needle 33 can also be inserted into the drainage tube 4, guiding the drainage tube 4 into the surgical channel 121 and guiding the drainage tube 4 to the target position. The connector 32 is assembled on at least one of the guide needle 33 and the handle 31, and the connector 32 can be adapted to the proximal end of the retractor assembly 1. After the drainage tube 4 is placed in the target position, the drainage tube guiding assembly 3 can be retracted together with the retractor assembly 1 via the connector 32.

[0049] During the puncture and drainage procedure, the guide needle 33 is first inserted into the drainage channel of the drainage tube 4. Then, the handle 31 is held to guide the guide needle 33 through the surgical channel 121 until the drainage tube 4 moves with the guide needle 33, extends out of the surgical channel 121, and is placed at the target location (lesion site). At this time, the connector 32 and the retraction catheter assembly 1 are assembled and fixed together. The handle 31 and guide needle 33 avoid directly holding the drainage tube 4, and the handle 31 is easy to hold, thus facilitating the drainage tube 4 to enter the brain and reach the lesion site through the retraction catheter assembly 1. Moreover, when it is necessary to remove the retraction catheter assembly 1, since the drainage tube guide assembly 3 is assembled and fixed together with the retraction catheter assembly 1 through the connector 32, the retraction catheter assembly 1 can be removed by removing the drainage tube guide assembly 3, thus facilitating the removal of the retraction catheter assembly 1 and reducing the difficulty of the puncture and drainage procedure.

[0050] It should be noted that the connector 32 can be fixed to the guide needle 33, the handle 31, or both. The connector 32 can be adapted to the proximal end of the retraction catheter assembly 1, allowing the connector 32 to be inserted into the surgical channel 121.

[0051] Please see Figure 1 and Figure 2 The connector 32 is elastic and is sleeved on the outside of the guide needle 33 and close to the handle 31. When the connector 32 is inserted into the surgical channel 121, the connector 32 is press-fitted with the surgical channel 121 to securely connect the connector 32 to the retraction catheter assembly 1, thereby allowing the retraction catheter assembly 1 to be withdrawn along with the drainage tube guide assembly 3. In addition, when the connector 32 is subjected to external force, the connector 32 and the retraction catheter assembly 1 can also be separated, realizing a detachable connection between the drainage tube guide assembly 3 and the retraction catheter assembly 1.

[0052] In some embodiments, such as Figure 7 As shown, the proximal surface of the handle 31 is curved, allowing it to fit snugly against the palm for easy gripping and force application; the distal end of the handle 31 is a cylinder with a gradually decreasing diameter for easy handling. The distal end of the guide needle 33 has a blunt tip, facilitating the insertion of the drainage tube 4 and preventing scratches on the drainage tube 4.

[0053] Please see Figure 2 and Figure 7 The outer side of the connector 32 is provided with raised ribs 321. The raised ribs 321 are used to abut against the inner wall of the surgical channel 121 when the connector 32 is inserted into the surgical channel 121. The raised ribs 321 are more prone to deformation than the outer surface of the connector 32, which is conducive to achieving an interference fit between the connector 32 and the surgical channel 121. There are multiple raised ribs 321. Multiple raised ribs 321 can improve the tightness of the connection between the connector 32 and the retractor assembly 1. The multiple raised ribs 321 are distributed at intervals along the length direction of the guide needle 33, that is, there is a gap between two adjacent raised ribs 321, thereby providing space for the deformation of the raised ribs 321. The raised ribs 321 are sleeved on the outside of the connector 32, that is, the raised ribs 321 are in the shape of a ring; the diameter of the multiple raised ribs 321 is the same or gradually changed, for example, the diameter of the multiple raised ribs 321 gradually decreases or increases from top to bottom.

[0054] According to actual needs, four raised ribs 321 can be provided. The four raised ribs 321 are distributed at equal intervals and have the same diameter.

[0055] Please see Figure 1 and Figure 2 The proximal end of the connector 32 is fixed to the handle 31, and the distal end is provided with a guide cone surface 322. The connector 32 and the handle 31 can be fixed together by adhesive bonding or connected as a whole. The guide needle 33 and the handle 31 can also be fixed together by adhesive bonding or connected as a whole. The connector 32 is provided with through holes at both ends, through which the guide needle 33 passes. The guide cone surface 322 can guide the connector 32 into the surgical channel 121, improving the smoothness of insertion.

[0056] Please see Figure 6 and Figure 8 The retractable catheter assembly 1 includes a fixing seat 11 and a sheath 12. The fixing seat 11 has a second mounting cavity; the sheath 12 is fixed to the fixing seat 11 and located in the second mounting cavity. The sheath 12 has a surgical channel 121. The distal end of the guide tube 21 is inserted and assembled to the distal end of the sheath 12, and the guide tube 21 and the sheath 12 are press-fitted to make the guide tube 21 and the sheath 12 tightly connected together.

[0057] Depending on actual needs, the fixing seat 11 and the sheath 12 can be fixed together by adhesive bonding or connected as a whole. The fixing seat 11 is provided with a flared opening 111 that communicates with the second mounting cavity. The flared opening 111 on the fixing seat 11 cooperates with the guide cone surface 322 on the connector 32, which facilitates the insertion of the connector 32 into the surgical channel 121 of the sheath 12.

[0058] During the insertion of the drainage tube guide assembly 3 into the retraction catheter assembly 1, the guide needle 33, which is fixed with the drainage tube 4, is inserted along the sheath 12 into the lesion site. After reaching the lesion site, the fixing seat 11 is pushed to move the sheath 12 along the length of the guide needle 33 until the connector 32 enters the sheath 12. At this time, the inner wall of the proximal end of the sheath 12 is press-fitted with the protruding rib 321 on the connector 32, and the drainage tube guide assembly 3 and the retraction catheter assembly 1 are firmly connected together. Then, while keeping the drainage tube 4 fixed, the drainage tube guide assembly 3 is withdrawn, and the retraction catheter assembly 1 is withdrawn together with the press-fitted sheath 12 and connector 32. At this time, the frictional force generated by the press-fitted inner wall of the proximal end of the sheath 12 and the protruding rib 321 on the connector 32 is greater than the pulling force of the retraction catheter assembly 1. If it is necessary to retract the catheter assembly 1 back to the lesion site, push the fixation seat 11 back forcefully. The interference fit between the sheath 12 and the connector 32 will loosen. At this time, the retractor assembly 1 and the drainage tube guide assembly 3 will separate, thus making it easier to remove the retractor assembly 1 from the brain tissue.

[0059] Please see Figure 4 and Figure 8 The guide assembly 2 also includes a connector 22 detachably connected to the retraction catheter assembly 1. The connector 22 has a first mounting cavity, and the proximal end of the guide tube 21 is fixed to the connector 22 and located in the first mounting cavity. The connector 22 and the retraction catheter assembly 1 can be detachably connected by a spring locking structure 5.

[0060] Please see Figure 4 In some embodiments, the spring locking structure 5 includes a snap-fit ​​member and a return member. The snap-fit ​​member is slidably mounted on the connecting seat 22, and the return member is connected to both the snap-fit ​​member and the fixing seat 11. The return member can be a spring. The fixing seat 11 has a slot, and the snap-fit ​​member can slide to engage or disengage with the slot, thereby connecting or separating the connecting seat 22 and the fixing seat 11. Specifically, pressing the snap-fit ​​member can cause it to slide and disengage from the slot, thus disassembling the connecting seat 22 and the fixing seat 11; or, the snap-fit ​​member can engage with the slot under the restoring force provided by the return member, thus fixing the connecting seat 22 and the fixing seat 11.

[0061] Please see Figure 4 and Figure 5The guide tube 21 includes a tube body 211 and a guide sheath head 212. The proximal end of the tube body 211 is fixed to the connecting seat 22, and the tube body 211 is provided with a guide channel 2111. The guide sheath head 212 is fixed to the distal end of the tube body 211 and is light-transmitting. The proximal end of the guide sheath head 212 is open and the distal end is closed to form a receiving cavity 2121. The receiving cavity 2121 is connected to the guide channel 2111. A visualization device can be inserted into the receiving cavity 2121. For example, the visualization device is an endoscope. The endoscope is inserted and cooperates with the receiving cavity 2121. The endoscope can move together with the guide sheath head 212, thereby ensuring that the endoscope is placed into the lesion site. At the same time, the light-transmitting setting of the guide sheath head 212 will not interfere with the images captured by the endoscope.

[0062] Please see Figure 5 and Figure 8 In some embodiments, the diameter of the guide sheath 212 is smaller than the diameter of the distal end of the surgical channel 121, so that the guide sheath 212 can extend beyond the distal end of the surgical channel 121, and the guide sheath 212 abuts against the inner wall of the distal end of the surgical channel 121. The end of the guide sheath 212 away from the tube body 211 has a bullet-shaped structure, which protects against retraction of brain tissue. The guide sheath 212 can be made of glass or resin, allowing the endoscope to image the state of brain tissue. The outer side of the guide sheath 212 can be glued to the opening at the distal end of the tube body 211, and the proximal end of the tube body 211 can be glued to the connecting seat 22. The flared opening 111 on the fixing seat 11 facilitates the passage of the bullet-shaped guide sheath 212.

[0063] The distal end of the sheath 12 is elastic, allowing it to contract and expand radially. The diameter of the sheath 12 is smaller than that of the guide tube 21, ensuring an interference fit between the guide sheath head 212 and the sheath 12 when the guide sheath head 212 is inserted. The outer surface of the guide sheath head 212 is in close contact with the inner wall of the sheath 12, allowing for a smooth transition between the guide sheath head 212 and the sheath 12 without any misalignment, protrusions, or depressions.

[0064] The following is a detailed explanation of the steps involved in a puncture and catheter placement drainage procedure:

[0065] 1. The endoscope is inserted into the guide sheath head 212 along the guide channel 2111 of the tube body 211, thereby fixing the endoscope in the receiving cavity 2121 of the guide sheath head 212; wherein, the guide sheath head 212 is elastic, and the endoscope and the guide sheath head 212 are press-fitted to achieve a tight connection.

[0066] 2. The guide tube 21 with the endoscope fixed is inserted into the brain tissue along the sheath 12. At this time, the lesion site can be quickly and accurately located through the endoscope. Then, the fixation seat 11 is fixed with the clamping device and the locking piece is pressed by hand. At this time, the guide assembly 2 and the retraction catheter assembly 1 are separated. The endoscope and the guide assembly 2 can be removed together from the retraction catheter assembly 1. The retraction catheter assembly 1 establishes a surgical channel 121 in the brain tissue.

[0067] 3. Insert and fix the drainage tube 4 to the distal end of the guide needle 33. The guide needle 33, along with the drainage tube 4, is inserted into the sheath 12. When the depth of insertion of the drainage tube 4 is equal to the length of the sheath 12, the drainage tube 4 is placed into the lesion site.

[0068] 4. Keep the handle 31 fixed and push the fixing seat 11 to move the sheath 12 along the length of the guide needle 33 until the connector 32 enters the proximal end of the sheath 12. At this time, the inner wall of the proximal end of the sheath 12 is press-fitted with the protruding rib 321 on the connector 32, and the drainage tube guide assembly 3 and the retraction catheter assembly 1 are tightly connected together.

[0069] 5. Use the clamping device to clamp and fix the drainage tube 4, and remove the drainage tube guide assembly 3. At this time, the catheter assembly 1 will move together with the drainage tube guide assembly 3, thus completing the placement of the drainage tube 4.

[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A drainage tube guiding assembly, characterized in that, include: A handle for the user to grip; A guide needle, with its proximal end fixed to the handle and its distal end inserted into the surgical channel of the retractor assembly, may also be inserted into a drainage tube to guide the drainage tube into the surgical channel and guide it to the target position; and, A connector is fitted onto at least one of the guide needle and the handle, and the connector is adaptable to the proximal end of the retraction catheter assembly. After the drainage tube is placed in the target position, the drainage tube guide assembly can be assembled with the retraction catheter assembly and then withdrawn together via the connector.

2. The drainage tube guiding assembly according to claim 1, characterized in that, The connector is elastic and is sleeved on the outside of the guide pin and close to the handle; When the connector is inserted into the surgical channel, the connector and the surgical channel are interference-fitted.

3. The drainage tube guiding assembly according to claim 2, characterized in that, The outer side of the connector is provided with raised ribs, which are used to abut against the inner wall of the surgical channel when the connector is inserted into the surgical channel.

4. The drainage tube guiding assembly according to claim 3, characterized in that, The protruding ribs are provided in multiples, and the multiple protruding ribs are distributed at intervals along the length direction of the guide pin.

5. The drainage tube guiding assembly according to claim 4, characterized in that, The raised ribs are sleeved on the outside of the connector, and the diameters of the multiple raised ribs are either the same or gradually varied.

6. The drainage tube guiding assembly according to claim 2, characterized in that, The proximal end of the connector is fixed to the handle, and the distal end is provided with a guide cone surface.

7. A guiding device, characterized in that, include: The catheter assembly is retracted, revealing a through surgical channel; A guiding assembly, detachably connected to the retraction catheter assembly, includes a guiding tube that can be inserted into the surgical channel. The guiding tube has a proximal opening and a distal end that is translucent. The distal end of the guiding tube can extend beyond the distal end of the surgical channel. A guiding channel connecting the proximal and distal ends is provided in the middle of the guiding tube, and a visualization device can be inserted within the guiding channel. According to any one of claims 1-6, the distal end of the guide needle can be inserted into the surgical channel, and the connector can be adapted and assembled with the proximal end of the retraction catheter assembly.

8. The guiding device according to claim 7, characterized in that, The guiding assembly also includes a connector that is detachably connected to the retraction catheter assembly, and the proximal end of the guiding tube is fixed to the connector.

9. The guiding device according to claim 8, characterized in that, The guide tube includes: The tube body, with its proximal end fixed to the connecting seat, is provided with the guide channel; and... The guide sheath head is fixed to the distal end of the tube body and is light-transmitting. The proximal end of the guide sheath head is open and the distal end is closed to form a receiving cavity. The receiving cavity is connected to the guide channel, and the visualization device can be inserted into the receiving cavity.

10. The guiding device according to claim 9, characterized in that, The diameter of the guide sheath head is smaller than the diameter of the distal end of the surgical channel.

11. The guiding device according to claim 7, characterized in that, The retraction catheter assembly includes: Fixed base; and, A sheath is fixed to the fixing base. The sheath has the surgical channel. The distal end of the guide tube is inserted and assembled to the distal end of the sheath, and the guide tube and the sheath are press-fitted.

12. The guiding device according to claim 11, characterized in that, The diameter of the sheath is smaller than the diameter of the guide tube.

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