A safe and visible KV dual-channel working sleeve and its use method

Abstract

The invention belongs to the technical field of medical sleeves, and discloses a safe and visual KV dual-channel working sleeve and a method of using the same, including a K working sleeve and a V working sleeve; a working channel for placing a V working sleeve, a trephine and a grinding drill surgical instrument is provided inside the K working sleeve; an endoscope channel for placing a foraminal endoscope is provided inside the V working sleeve; a gap exists between the inner wall of the K working sleeve and the outer wall of the V working sleeve, and a certain distance is reserved at one end of the outlet of the two after the K working sleeve and the V working sleeve are locked together; the K working sleeve includes a K sleeve body, a K sleeve base and a locking nail, and the V working sleeve includes a V sleeve body and a V sleeve base. The present invention can avoid the risk of dura mater and nerve damage caused by repeated replacement of the protective sleeve and the working sleeve, and at the same time avoid the problem of working sleeve deviation, thereby ensuring the accuracy of the operation, improving the efficiency of the operation, and increasing the success rate of the forming of the working channel.

Description

Technical Field

[0001] The invention belongs to the technical field of medical cannulas, and in particular relates to a safe and visible KV dual-channel working cannula and a use method thereof. Background Art

[0002] At present, percutaneous transforaminal endoscopic lumbar discectomy is a medical device widely used for degenerative diseases of the spinal intervertebral disc. There are currently two main methods for surgical treatment of spinal disc herniation: one is a posterior percutaneous transforaminal approach, in which a 7mm channel is established in the affected area, a transforaminal endoscope is placed to connect to the imaging system, and the herniated disc is removed endoscopically to release the nerves, thereby achieving clinical cure; the other is a posterior percutaneous interlaminar approach, which is a method of removing the disc by opening a window in the vertebral lamina and directly visualizing the removal of the disc. A 10mm incision is made in the skin of the affected area, a window is opened in the vertebral lamina with a ring saw or a drill to establish a working channel, the disc is removed with a nucleus pulposus forceps, the nerve root is decompressed and hemostasis is performed, and the skin is sutured to relieve the pressure of the disc on the nerve root and achieve the treatment purpose. Existing transforaminal endoscopic surgical instruments include positioning instruments, instruments for establishing working channels, working sleeve instruments, protective sleeve instruments, endoscopic instruments, instruments for processing bones and soft tissues, etc. Among them, the instruments for establishing working channels are composed of guide rods and gradually expanding expansion tubes. The protective sleeves establish a safe channel for the ring saw and the bur to avoid damage to the surrounding soft tissue and nerves. The working sleeves have important functions such as supporting the working channel, protecting the surrounding tissues, and accommodating the endoscope for surgical operations. When the transforaminal endoscopic technique uses a ring saw or a bur to open a window in the vertebral plate of the spine to establish a working channel, it is necessary to repeatedly replace the protective sleeve and the working sleeve to complete the operation, which increases the risk of nerve damage and dural tear surgery caused by the re-expansion of soft tissues, and at the same time causes the problem of working sleeve displacement. At present, there is no good solution to this problem.

[0003] As disclosed in publication number CN211243489U, a transforaminal endoscopic working sleeve with a Kirschner wire comprises a working sleeve and a Kirschner wire. A raised Kirschner wire guide sleeve is provided on the working sleeve. The guide channel of the Kirschner wire guide sleeve is connected to the intersection surface of the working channel of the working sleeve. The left end of the working sleeve is interference-connected with a connector. The connector is an integrated structure composed of a gripping base and a fitting portion. A stop groove matching the Kirschner wire guide sleeve is provided on the inner wall of the fitting portion. The left end of the working sleeve is inserted into the insertion channel of the connector and the Kirschner wire guide sleeve is inserted into the stop groove. The end face of the working sleeve is flush with the end face of the fitting portion. The Kirschner wire is inserted into the Kirschner wire guide sleeve of the working sleeve and the needle tip of the Kirschner wire extends out of the right end of the working sleeve.

[0004] As disclosed in publication number CN210170093U, an angle-adjustable intervertebral foraminal endoscope protective working sleeve comprises a main sleeve and a secondary sleeve, wherein the main sleeve comprises a cylindrical main sleeve body and a main sleeve handle fixedly connected to the main sleeve body, scale lines are arranged on the outer wall of the main sleeve body, the head of the main sleeve body is the oblique mouth part of the main sleeve, and the oblique mouth part of the main sleeve forms an acute angle with the horizontal plane; the secondary sleeve is built into the main sleeve, the secondary sleeve comprises a semicircular arc-shaped secondary sleeve body and a secondary sleeve handle detachably connected to the secondary sleeve body, there is a gap between the outer wall of the secondary sleeve body and the inner wall of the main sleeve body, scale lines are arranged on the outer wall of the secondary sleeve body, and the secondary sleeve body comprises a tail semicircular arc section, a middle circular ring section and a head semicircular arc section fixedly connected in sequence, the tail semicircular arc section is an upper semicircle, and the head semicircular arc section is a lower semicircle.

[0005] The above two patents do not avoid the repeated replacement of the protective sleeve and the working sleeve when opening a window to establish a working channel, and the risks of nerve damage and dural tearing caused by soft tissue re-expansion. At the same time, they also do not avoid the deviation problem caused by the repeated replacement of the protective sleeve and the working sleeve.

[0006] Through the above analysis, the problems and defects of the prior art are as follows:

[0007] When using the existing working sleeve, the protective sleeve and the working sleeve need to be replaced repeatedly, which increases the risk of nerve damage and dural tear surgery caused by soft tissue re-expansion. In addition, the work efficiency is low and there is a problem of working sleeve deviation. Summary of the invention

[0008] In view of the problems existing in the prior art, the present invention provides a safe and visible KV dual-channel working sleeve and a use method thereof.

[0009] The present invention is realized in this way: a safe visual KV dual-channel working sleeve

[0010] Including K working sleeve and V working sleeve;

[0011] The K working sleeve has a working channel for placing the V working sleeve, a ring saw and a grinding drill surgical instrument;

[0012] The V-shaped working sleeve has an endoscope channel for placing an endoscope.

[0013] A built-in slide groove is provided on one side of the K working sleeve handle, and a lock buckle rotates in the built-in slide groove. Correspondingly, a positioning groove is provided on one side of the V working sleeve handle. During the operation, after the surgical K working sleeve is combined with the V working sleeve set, the lock buckle is turned to one end of the built-in slide groove, and the inner end of the lock buckle can be inserted into the positioning groove for limiting. Thereby, the K working sleeve and the V working sleeve can be further locked, thereby improving the fixation effect on the spinal endoscope.

[0014] Furthermore, the head of the K sleeve body presents a 10° bevel opening surface, and the edges of the opening surface of the 10° bevel opening surface structure are obtuse angles; the head of the V sleeve body presents a 30° bevel opening surface, and the edges of the opening surface of the 30° bevel opening surface structure are obtuse angles.

[0015] Furthermore, the V working sleeve is sleeved on the inner side of the K working sleeve, and there is a gap of 0.1 to 0.2 mm between the inner wall of the K working sleeve and the outer wall of the V working sleeve, so as to avoid excessive resistance and difficulty in operation of the K working sleeve and the V working sleeve during the replacement process. After the K working sleeve and the V working sleeve are embedded and locked, a distance of 30 to 45 mm is reserved between one end of the outlet of the two, so as to better observe the exposed length of the ring saw inserted into the K working sleeve.

[0016] Further, the K working sleeve comprises a K sleeve body, a K sleeve base and a locking pin, the K sleeve base is fixedly welded to the inlet end of the K sleeve body, threaded holes are arranged on both side surfaces of the K sleeve base, and the K sleeve base is connected to the locking pin by threads;

[0017] The V working sleeve comprises a V sleeve body and a V sleeve base, and the V sleeve base is provided with a hemispherical groove matched with a locking pin.

[0018] Furthermore, the K sleeve base is provided with a step surface, and the step surface is provided with a through hole that cooperates with the K sleeve body.

[0019] Furthermore, the locking pin is provided with a threaded tube, a spring and a steel ball, the spring and the steel ball are both arranged on the inner side of the threaded tube, the steel ball is located at the inner outer end of the threaded tube, the threaded tube is connected to the threaded hole of the K sleeve base, and the steel ball is clamped with the hemispherical groove of the V working sleeve.

[0020] Furthermore, the head of the K sleeve body is a stepped, sharply protruding duckbill-shaped structural opening surface, the oblique opening portion of the head end of the duckbill-shaped structural opening surface forms an acute angle with the horizontal plane, and the edges of the duckbill-shaped structural opening surface form obtuse angles.

[0021] Furthermore, the head of the V-tube body is a tongue-shaped structure opening surface, the oblique portion of the tongue-shaped structure opening surface forms an acute angle with the horizontal plane, and the edge of the tongue-shaped structure opening surface forms an obtuse angle.

[0022] Furthermore, the K working sleeve and the V working sleeve are both made of stainless steel, carbon fiber or polymer plastic.

[0023] Furthermore, the inner diameter of the K working sleeve is 8 mm and 9 mm, the outer diameter is 9 mm and 10 mm, and the working length is 185 mm and 155 mm.

[0024] Furthermore, the inner diameter of the V working sleeve is 6.5 mm and 7.5 mm, the outer diameter is 7.8 mm and 8.8 mm, and the working length is 205 mm and 175 mm.

[0025] Furthermore, there is a gap of 0.1 to 0.2 mm between the inner wall of the K working sleeve and the outer wall of the V working sleeve, so as to prevent the K working sleeve and the V working sleeve from generating too much resistance and being difficult to operate during the replacement process. After the K working sleeve and the V working sleeve are embedded and locked, a distance of 30 to 45 mm is reserved between one end of the outlet of the two, so as to better observe the exposed length of the ring saw inserted into the K working sleeve and reduce the occurrence of surgical risks.

[0026] Another object of the present invention is to provide a method for using a safe visual KV dual-channel working sleeve, the method for using the safe visual KV dual-channel working sleeve comprising:

[0027] Step 1: Place the K-tube body into the K-tube base so that the inlet end surface of the K-tube body is flush with the upper surface of the through hole of the step surface of the K-tube base;

[0028] Step 2: Laser weld the upper end surface intersection line and the lower end surface intersection line of the K sleeve base at the assembly position, so that the straight plane of the K sleeve base is perpendicular to the opening surface of the duckbill structure;

[0029] Step 3: Screw the two locking pins into the threaded holes on the outside of the two inclined planes of the K sleeve base respectively, so that the steel balls are exposed on the inside of the two inclined planes;

[0030] Step 4: Place the V-tube body into the V-tube base so that the inlet end surface of the V-tube body is flush with the upper surface of the through hole of the V-tube base;

[0031] Step 5: Laser weld the upper and lower surface intersection lines at the V-sleeve base assembly so that the straight plane of the V-sleeve base is perpendicular to the opening surface of the tongue-shaped structure. Insert the V working sleeve into the K working sleeve, and the steel ball of the locking pin is just in the hemispherical groove.

[0032] In combination with the above technical solutions and the technical problems solved, please analyze the advantages and positive effects of the technical solutions to be protected by the present invention from the following aspects:

[0033] First, in view of the technical problems existing in the above-mentioned prior art and the difficulty of solving the problems, the technical solutions to be protected by the present invention and the results and data during the research and development process are closely combined to analyze in detail and deeply how the technical solutions of the present invention solve the technical problems, and some creative technical effects brought about after solving the problems. The specific description is as follows:

[0034] (1) Through the application of the present invention, the design of the KV working cannula conforms to the three-dimensional anatomical structure of the interlaminar window and intervertebral foramen, reducing additional damage to the patient during placement and improving safety;

[0035] (2) Through the application of the present invention, the visual ring saw works under the protection of the K working sleeve, and an endoscope is placed in the visual ring saw. Under the endoscope, the whole process of visual lower lamina fenestration can be realized. The V working sleeve is replaced with the visual ring saw, and the endoscope is placed in the V working sleeve. Visual surgical operation can be realized under the endoscope, which makes the operation more simple and safe, and reduces the difficulty of surgery;

[0036] (3) Through the application of the present invention, after the working channel is established through step-by-step expansion, there is no need to repeatedly replace the protective sleeve and the working sleeve. The risk of dura mater and nerve damage caused by repeated replacement of the protective sleeve and the working sleeve can be avoided in the whole process, making the operation safer and improving the surgical efficiency.

[0037] (4) By applying the present invention, the problem of working sleeve deviation caused by repeated replacement of the protective sleeve and the working sleeve is avoided, the accuracy of the operation is guaranteed, and the success rate of the trephination is increased.

[0038] Second, considering the technical solution as a whole or from the perspective of the product, the technical effects and advantages of the technical solution to be protected by the present invention are described in detail as follows:

[0039] The present invention can avoid the risk of dura mater and nerve damage caused by repeated replacement of the protective sleeve and the working sleeve, and at the same time avoid the problem of working sleeve deviation, thereby ensuring the accuracy of the operation, improving the operation efficiency, and increasing the success rate of working channel formation.

[0040] Third, as auxiliary evidence of the inventiveness of the claims of the present invention, it is also reflected in the following important aspects:

[0041] (1) The expected benefits and commercial value of the technical solution of the present invention after transformation are as follows: After the technical solution of the present invention is transformed and used by clinicians, if it can be expected to solve the problems of nerve damage, dural tear surgical risks and inaccurate positioning of the working cannula caused by establishing a working channel in traditional perforaminal endoscopic lumbar disc surgery, a safe and visible KV dual-channel working cannula will become an essential instrument for perforaminal endoscopic lumbar disc surgery. The future benefits are expected to grow by 5% to 10% per year, and the benefits in the early stage of promotion will be explosive growth.

[0042] (2) The technical solution of the present invention solves a technical problem that people have been eager to solve but have never been able to solve: the technical solution of the present invention solves the problem that during the current perforaminal endoscopic surgery, a hole needs to be opened in the bone tissue, and there are risks of nerve damage and dural tear caused by repeated operation of the protective sleeve and the working sleeve. At the same time, the problem of working sleeve displacement caused by repeated replacement of the protective sleeve and the working sleeve is solved. Therefore, how to provide an efficient and accurate method for establishing an endoscopic working channel is a technical problem that the invention patent urgently needs to solve. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of a safe visual KV dual-channel working sleeve provided by an embodiment of the present invention;

[0044] Figure 2 is a schematic structural diagram of a K working sleeve provided in an embodiment of the present invention;

[0045] Figure 3 is a schematic structural diagram of a K sleeve base provided in an embodiment of the present invention;

[0046] Figure 4 is a schematic structural diagram of a V-working casing provided by an embodiment of the present invention;

[0047] Figure 5 is a schematic structural diagram of a V-casing base provided by an embodiment of the present invention;

[0048] Figure 6 It is a schematic diagram of the structure of the KV sleeve distal end opening surface assembly provided by an embodiment of the present invention;

[0049] Figure 7 It is a structural schematic diagram of the connection method of various sub-components of the KV working sleeve provided in an embodiment of the present invention;

[0050] In the figure: 1. K sleeve body; 2. K sleeve base; 3. V sleeve body; 4. V sleeve base; 5. locking pin; 6. first inlet end face; 7. first through hole upper surface; 8. first upper end face intersection line; 9. first lower end face intersection line; 10. first straight plane; 11. duckbill structure opening surface; 12. outer side of inclined plane; 13. threaded hole; 14. steel ball; 15. inner side of inclined plane; 16. second inlet end face; 17. second through hole upper surface; 18. second upper end face intersection line; 19. second lower end face intersection line; 20. second straight plane; 21. tongue structure opening surface; 22. V working sleeve; 23. K working sleeve; 24. hemispherical slot; 25. spring; 26. K working sleeve welding part; 27. V working sleeve welding part. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] In order to enable those skilled in the art to fully understand how to implement the present invention in detail, this section is an explanatory embodiment that expands and describes the technical solution of the claims.

[0053] like Figure 1 As shown, the safe visual KV dual-channel working sleeve provided by the embodiment of the present invention includes a K working sleeve 23 and a V working sleeve 22. The inner surface of the inner body of the K working sleeve 23 forms a working channel, which is used to place the V working sleeve, trephine and grinding drill surgical instruments. The inner surface of the V working sleeve 22 forms an endoscope channel, which is used to place the intervertebral foraminal endoscope. There is a gap between the inner wall of the K working sleeve 23 and the outer wall of the V working sleeve 22. After the K working sleeve 23 and the V working sleeve 22 are embedded and locked, a certain distance is reserved between one end of the two outlets.

[0054] like Figure 2 and Figure 3 As shown, the K working sleeve 23 in the embodiment of the present invention includes a K sleeve body 1, a K sleeve base 2 and a locking pin 5. The K sleeve base 2 is fixedly welded to the inlet end of the K sleeve body 1. A threaded hole 13 is respectively opened on both side surfaces of the K sleeve base 2. The K sleeve base 2 is connected to the locking pin 5 by threads.

[0055] The K sleeve body 1 is arranged in the horizontal direction, and the K sleeve body 1 is a hollow tubular structure, and an inlet and an outlet are formed at both ends of the K sleeve body 1. The K sleeve base 2 is provided with a step surface, and a through hole is provided on the step surface to match the K sleeve body 1. The head of the K sleeve body 1 is a stepped and sharply protruding duckbill structure opening surface 11, and the oblique opening portion of the head end of the duckbill structure opening surface 11 is at an acute angle to the horizontal plane, and the edges of the duckbill structure opening surface 11 are at an obtuse angle.

[0056] The locking pin 5 in the embodiment of the present invention is provided with a threaded tube, a spring and a steel ball 14, wherein the spring and the steel ball 14 are both arranged inside the threaded tube, the steel ball 4 is located at the inner outer end of the threaded tube, and the threaded tube is connected to the threaded hole of the K sleeve base.

[0057] like Figure 4 and Figure 5As shown, the V working sleeve 22 in the embodiment of the present invention comprises a V sleeve body 3 and a V sleeve base 4, and the V sleeve base 4 is provided with a hemispherical slot 24 that matches the locking pin 5. The head of the V sleeve body 3 is a tongue-shaped structure opening surface 21, and the oblique part of the tongue-shaped structure opening surface 21 is at an acute angle to the horizontal plane, and the edge of the tongue-shaped structure opening surface 21 is at an obtuse angle. The V sleeve body 3 is arranged in the horizontal direction, and the V sleeve body 3 is a hollow tubular structure, and an inlet and an outlet are formed at both ends of the V sleeve body 3. Preferably, the K working sleeve 23 and the V working sleeve 22 in the embodiment of the present invention are both made of stainless steel.

[0058] Figure 6 It is a schematic diagram of the structure of the KV sleeve distal end opening surface assembly provided by an embodiment of the present invention; Figure 7 It is a structural schematic diagram of the connection method of various sub-components of the KV working sleeve provided in an embodiment of the present invention.

[0059] Preferably, the K sleeve base 2 in the embodiment of the present invention is designed in the shape of the letter "K", and the V sleeve base 4 is designed in the shape of the letter "V", and the K sleeve base 2 and the V sleeve base 4 are designed as a "K<" embedded fit. The "K<" embedded fit is connected by the locking pin 5 and the hemispherical slot 24.

[0060] Preferably, the inner diameter of the K working sleeve 23 in the embodiment of the present invention is 8 mm and 9 mm, the outer diameter is 9 mm and 10 mm, and the working length is 185 mm and 155 mm.

[0061] Preferably, the V-working sleeve 22 in the embodiment of the present invention has an inner diameter of 6.5 mm and 7.5 mm, an outer diameter of 7.8 mm and 8.8 mm, and a working length of 205 mm and 175 mm.

[0062] The method for using the safe visual KV dual-channel working sleeve provided in the embodiment of the present invention includes:

[0063] First, place the K-tube body 1 into the K-tube base 2, ensure that the first inlet end face 6 of the K-tube body 1 is flush with the upper surface 7 of the first through hole on the step surface of the K-tube base 2, laser weld the first upper end face intersection line 8 and the first lower end face intersection line 9 at the assembly, ensure that the first straight plane 10 of the K-tube base 2 is perpendicular to the duckbill structure opening surface 11, screw the two locking pins 5 into the threaded holes 13 on the outer sides 12 of the two inclined planes of the K-tube base 2 respectively, and ensure that the steel balls 14 are exposed on the two inclined planes. On the inner side 15 of the surface, the V-sleeve body 3 is placed into the V-sleeve base 4, ensuring that the second inlet end face 16 of the V-sleeve body 3 is flush with the upper surface 17 of the second through hole of the V-sleeve base 4, and the second upper end face intersection line 18 and the second lower end face intersection line 19 at the assembly are laser welded to ensure that the second straight plane 20 of the V-sleeve base 4 is perpendicular to the tongue-shaped structure opening surface 21, and the V working sleeve 22 is inserted into the K working sleeve 23, and the steel ball 14 of the locking pin 5 is clamped in the hemispherical groove 24.

[0064] The present invention does not need to repeatedly replace the V working sleeve 22 and the K working sleeve 23 when establishing the working channel after step-by-step expansion. The ring saw or the grinding drill performs lamina windowing under the protection of the K working sleeve 23, the ring saw or the grinding drill is removed, the K working sleeve 23 is inserted, the endoscope is inserted into the K working sleeve 23, the intervertebral disc is removed with a nucleus pulposus forceps, the nerve root is decompressed, and the surgical electrode is used to stop bleeding. The whole process can avoid the risk of dura mater and nerve damage caused by repeated replacement of the V working sleeve 22 and the K working sleeve 23, and at the same time avoid the problem of working sleeve deviation, thereby ensuring the accuracy of the operation, improving the operation efficiency, and increasing the success rate of working channel formation.

[0065] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0066] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A safe and visual KV dual-channel working sleeve, characterized in that: The safe and visible KV dual-channel working sleeve includes a K working sleeve and a V working sleeve; Including K working sleeve and V working sleeve; The K working sleeve has a working channel for placing a V working sleeve, a ring saw and a grinding drill surgical instrument; the K working sleeve includes a K sleeve body, a K sleeve base and a locking pin; The V-shaped working sleeve has an endoscope channel for placing an endoscope. A threaded hole is provided on one side of the K working sleeve handle, and a locking pin is rotated in the threaded hole. Correspondingly, a hemispherical groove is provided on one side of the V working sleeve handle. During the operation, after the K working sleeve and the V working sleeve are combined, the locking pin is turned to one end of the threaded hole, and the inner end of the locking pin is inserted into the hemispherical groove for limiting, so that the K working sleeve and the V working sleeve are locked; The head of the K sleeve body has a 10° bevel opening surface, and the edges of the opening surface of the 10° bevel opening surface structure are obtuse angles; the head of the V sleeve body has a 30° bevel opening surface, and the edges of the opening surface of the 30° bevel opening surface structure are obtuse angles; The V working sleeve is sleeved inside the K working sleeve, and there is a gap of 0.1 to 0.2 mm between the inner wall of the K working sleeve and the outer wall of the V working sleeve; after the K working sleeve and the V working sleeve are embedded and locked, a distance of 30 to 45 mm is reserved between one end of the outlets of the two.

2. The safe visual KV dual-channel working sleeve as claimed in claim 1, characterized in that: The K sleeve base is fixedly welded to the inlet end of the K sleeve body, threaded holes are arranged on both sides of the K sleeve base, and the K sleeve base is connected to the locking pin through threads; The V working sleeve comprises a V sleeve body and a V sleeve base, and the V sleeve base is provided with a hemispherical groove matched with a locking pin.

3. The safe visual KV dual-channel working sleeve as described in claim 2 is characterized in that: The K sleeve base is provided with a step surface, and a through hole matching with the K sleeve body is provided on the step surface; The locking pin is provided with a threaded tube, a spring and a steel ball. The spring and the steel ball are both arranged on the inner side of the threaded tube. The steel ball is located at the outer end of the inner side of the threaded tube. The threaded tube is connected to the threaded hole of the K sleeve base, and the steel ball is clamped with the hemispherical groove of the V working sleeve.

4. The safe visual KV dual-channel working sleeve as claimed in claim 1, characterized in that: The head of the K sleeve body is a stepped and sharply protruding duckbill-shaped structure opening surface, the head end oblique opening portion of the duckbill-shaped structure opening surface forms an acute angle with the horizontal plane, and the edge of the duckbill-shaped structure opening surface forms an obtuse angle; The head of the V-tube body is a tongue-shaped structure opening surface, the oblique portion of the tongue-shaped structure opening surface forms an acute angle with the horizontal plane, and the edge of the tongue-shaped structure opening surface forms an obtuse angle.

5. The safe visual KV dual-channel working sleeve as claimed in claim 1, characterized in that: The K working sleeve and the V working sleeve are both made of stainless steel.

6. The safe visual KV dual-channel working sleeve as claimed in claim 1, characterized in that: The K working sleeve has an inner diameter of 8 mm or 9 mm, an outer diameter of 9 mm or 10 mm, and a working length of 185 mm or 155 mm.

7. The safe visual KV dual-channel working sleeve as claimed in claim 1, characterized in that: The V working sleeve has an inner diameter of 6.5 mm or 7.5 mm, an outer diameter of 7.8 mm or 8.8 mm, and a working length of 205 mm or 175 mm.

8. A method for using the safe visual KV dual-channel working sleeve according to any one of claims 1 to 7, characterized in that: The method for using the safe visual KV dual-channel working sleeve includes: Step 1: Place the K-tube body into the K-tube base so that the inlet end surface of the K-tube body is flush with the upper surface of the through hole of the step surface of the K-tube base; Step 2: Laser weld the intersection line of the upper end surface and the intersection line of the lower end surface of the K sleeve base at the assembly position, so that the straight plane of the K sleeve base is perpendicular to the opening surface of the duckbill structure; Step 3: Screw the two locking pins into the threaded holes on the outside of the two inclined planes of the K sleeve base respectively, so that the steel balls are exposed on the inside of the two inclined planes; Step 4: Place the V-tube body into the V-tube base so that the inlet end surface of the V-tube body is flush with the upper surface of the through hole of the V-tube base; Step 5: Laser weld the upper and lower surface intersection lines at the V-sleeve base assembly so that the straight plane of the V-sleeve base is perpendicular to the opening surface of the tongue-shaped structure. Insert the V working sleeve into the K working sleeve, and the steel ball of the locking pin is just in the hemispherical groove.

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