Cannula for UBE operation

Abstract

The utility model discloses a cannula for UBE surgery, and relates to the technical field of medical instruments, the cannula comprises a main tube body, two hollow cannulas arranged on the outer side of the main tube body, the hollow cannulas are parallel to the main tube body, the surgery area end of the main tube body is provided with a conical surface part, the surgery area end of the main tube body is provided with a first cambered surface incision, and the first cambered surface incision is provided with a second cambered surface incision. The circle center of the first arc-surface incision is located outside the main catheter body, and the edge of the first arc-surface incision extends to the end face of the operation area end of the main catheter body. When in use, the device can be positioned, so that soft tissues can be shielded during an operation, and the operation is more convenient.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a UBE surgical cannula. Background Technology

[0002] UBE (Unilateral Biportal Endoscopy) is a minimally invasive endoscopic technique applicable to procedures such as discectomy, decompression for lumbar spinal stenosis, and fusion fixation for lumbar spondylolisthesis. The surgery requires establishing two channels: an endoscopic channel and a workportal, forming an inverted triangle. This allows the distal ends of the endoscope and instruments to converge. Because the human body is soft tissue, directly using the endoscope and instruments during the procedure presents challenges for beginners. Firstly, after establishing the channels and removing the progressively larger cannulas, it can be difficult to quickly and accurately locate the original channels. Secondly, intraoperative obstruction of drainage due to soft tissue can lead to unclear surgical fields / unclear anatomical landmarks, requiring repeated fluoroscopy. Utility Model Content

[0003] In view of this, this application provides a cannula for UBE surgery to solve the technical problems of low surgical efficiency caused by the difficulty of positioning for beginners during surgery and poor field of vision caused by soft tissue obstruction during surgery.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A UBE surgical cannula includes a main body and two hollow cannulas disposed outside the main body. The hollow cannulas are parallel to the main body. The surgical end of the main body has a conical surface and a first arc-shaped incision is provided on the surgical end of the main body. The center of the first arc-shaped incision is located outside the main body, and the edge of the first arc-shaped incision extends to the end face of the surgical end of the main body.

[0006] Furthermore, the operating end of the main body is provided with a second arc-shaped cut, the center of which is located outside the main body, and the edge of which extends to the end face of the operating end of the main body.

[0007] Furthermore, the first arc surface cut and the second arc surface cut are offset by 180° in the circumferential direction.

[0008] Furthermore, the axial height of the second arc-shaped cut is greater than the axial height of the first arc-shaped cut.

[0009] Furthermore, the axial height of the main body is 10cm, the axial height of the second arc-shaped cut is 6cm, and the axial height of the first arc-shaped cut is 2cm.

[0010] Furthermore, the inner diameter of the hollow sleeve is 2mm.

[0011] Furthermore, the axial height of the conical section is 5 mm.

[0012] Furthermore, a guide groove is provided on the outer side of the main tube, and a guide rail is provided on the outer side of the hollow sleeve that slides in cooperation with the corresponding guide groove.

[0013] Furthermore, the guide rail is equipped with a ball bearing that floats using a tower-shaped spring, and the ball bearing can be elastically engaged with the corresponding slot in the guide groove.

[0014] As can be seen from the above technical solution, the advantages of this utility model are:

[0015] 1. This application utilizes the main tube as the channel for instrument operation, making instrument use convenient; the use of a hollow cannula and Kirschner wires to assist in limiting the main tube prevents rotation of the main tube from causing rotation of the first arc-shaped incision used to limit the endoscope, thus affecting surgical positioning. This is user-friendly for beginners. After the cannula is removed, the position of the Kirschner wires can be used to determine the original channel position, making it easy to locate the surgical position; and the design of the first arc-shaped incision creates a tongue-like structure at the surgical end of the main tube that can block soft tissue, solving problems such as unclear surgical field / unclear anatomical landmarks due to poor drainage caused by soft tissue obstruction, requiring repeated fluoroscopy during surgery.

[0016] 2. This application includes a second arc-shaped cut. The second arc-shaped cut allows the height of the main body to meet the usage requirements while also enabling the use of instruments with shorter operating parts.

[0017] 3. The cone-shaped surface of the main body in this application can be used to assist in the dissection of soft tissue by utilizing the bevel of the cone-shaped surface.

[0018] 4. This application features a main pipe and a hollow sleeve that can be detachably connected. The hollow sleeve can be used with main pipes of different specifications. Main pipes of different diameters can be stored by sleeve. When in use, the corresponding specification of main pipe can be quickly selected for use, making it more convenient. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0020] Figure 1 This is a schematic diagram of the structure of this application. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the structure of this application. Figure 2 .

[0022] Figure 3 This is a side view of this application.

[0023] Figure 4 This is a top view of the multi-level managerial assembly of this application.

[0024] Figure 5 This is a schematic diagram of the hollow sleeve of this application when it can be detachably installed.

[0025] Figure 6 For the purposes of this application Figure 5 A magnified view of section A in the image.

[0026] Explanation of reference numerals in the attached drawings: 1-Main body; 11-First arc-shaped cut; 12-Second arc-shaped cut; 13-Conical section; 14-Guide groove; 2-Hollow sleeve; 21-Guide rail; 22-Clamping ball; 23-Tower-shaped spring; 24-Pressure cap. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and their descriptions are used to explain this application, but are not intended to limit it.

[0028] Example 1

[0029] refer to Figures 1 to 3 ,like Figure 1 , Figure 2 and Figure 3As shown, this embodiment provides a UBE surgical cannula, including a main body 1 and two hollow cannulas 2 disposed on the outside of the main body 1. The hollow cannulas 2 are parallel to the main body 1. The main body 1 serves as a channel for instrument operation, facilitating instrument use. The hollow cannulas 2 cooperate with Kirschner wires to assist in limiting the main body 1, preventing rotation of the main body 1. Furthermore, after the cannula is removed, the position of the Kirschner wires can be used to determine the original channel position, facilitating surgical location. The surgical end of the main body 1 has a conical surface 13, whose bevel can assist in the dissection of soft tissue. The surgical end of the main body 1 has a first arc-shaped incision 11, which can serve as a quick access point for the endoscope and instruments. The endoscope is quickly aligned to form a stable inverted triangle, and the endoscope can be positioned relative to the first arc-shaped incision 11 and the main tube 1, forming a stable intersection. The function of the first arc-shaped incision 11 can be referred to the advantages of the opening groove in CN217853085U. The center of the first arc-shaped incision 11 is located outside the main tube 1, and the edge of the first arc-shaped incision 11 extends to the end face of the surgical area of ​​the main tube 1. The setting of the first arc-shaped incision makes the field of view wider and forms a tongue at the surgical area of ​​the main tube 1 that can block soft tissue. The tongue can effectively block soft tissue and solve the problems of unclear surgical field / unclear anatomical landmarks due to poor drainage caused by soft tissue obstruction, which requires repeated fluoroscopy during the operation, thus facilitating the operation.

[0030] In this embodiment, preferably, the axes of the two hollow sleeves 2 are located in the same radial plane, and the first arc-shaped cut 11 is located between the two hollow sleeves 2 to avoid interference between the Kirschner wire and the instrument.

[0031] In this embodiment, the operating end of the main body 1 is provided with a second arc-shaped cutout 12. The first arc-shaped cutout 11 and the second arc-shaped cutout 12 are offset by 180° in the circumferential direction. The center of the second arc-shaped cutout 12 is located outside the main body 1, and the edge of the second arc-shaped cutout 12 extends to the end face of the operating end of the main body 1. The provision of the second arc-shaped cutout 12 allows the height of the main body 1 to meet the usage requirements while also enabling the use of instruments with shorter operating parts, such as instruments where the operating part and the handheld part are misaligned or instruments where the operating part is soft.

[0032] In this embodiment, the axial height of the second arc-shaped cut 12 is greater than the axial height of the first arc-shaped cut 11. This satisfies both instrument guidance and endoscope positioning while allowing for instruments with the shortest possible operating section or the shortest possible suspended end, thus improving the accuracy of instrument position control.

[0033] In this embodiment, preferably, the height of the main body 1 along the axial direction is 10cm, the height of the second arc surface cut 12 along the axial direction is 6cm, and the height of the first arc surface cut 11 along the axial direction is 2cm.

[0034] In this embodiment, the inner diameter of the main body 1 is preferably 0.8cm / 1.0cm / 1.2cm / 1.4cm.

[0035] In this embodiment, the inner diameter of the hollow sleeve 2 is 2mm, and it is used in conjunction with a Kirschner wire with a diameter of 1.5mm.

[0036] In this embodiment, the axial height of the conical section 13 is 5 mm.

[0037] In this embodiment, the maximum wall thickness of the main body 1 is 1 mm, and the minimum wall thickness of the main body 1 is 0.5 mm, that is, the constricted end of the conical part 13 is the part with the minimum wall thickness.

[0038] Example 2

[0039] refer to Figures 4 to 6 As shown, in this embodiment, based on Embodiment 1, the main pipe 1 and the hollow sleeve 2 can be separated, facilitating the use of the hollow sleeve 2 with main pipes 1 of different specifications. Multiple specifications of main pipes 1 with different diameters can be used as follows... Figure 4 As shown, the main body 1 of the corresponding specification can be quickly selected for use when the items are stacked and stored.

[0040] In this embodiment, a guide groove 14 is provided on the outer side of the main tube 1, and a guide rail 21 is provided on the outer side of the hollow sleeve 2, which slides in cooperation with the corresponding guide groove 14. The sliding friction between the guide rail 21 and the guide groove 14 can be used to reliably connect the main tube 1 and the hollow sleeve 2 together, or the position of the hollow sleeve 2 can be locked by an external locking device, such as a locking screw.

[0041] In this preferred embodiment, the guide rail 21 is provided with a retaining bead 22 that floats due to a tower-shaped spring 23. The retaining bead 22 can elastically engage with a slot located in the corresponding guide groove 14. The retaining bead 22 is used to achieve locking by elastically engaging with the slot. When disassembly is required, the hollow sleeve 2 is directly pushed to slide, overcoming the elastic force of the tower-shaped spring 23 and pressing the retaining bead 22 into the guide rail 21. The hollow sleeve 2 is easy to assemble and disassemble.

[0042] Specifically, the guide rail 21 is provided with a mounting cavity, the tower spring 23 and the retaining ball 22 are placed in the mounting cavity, and the tower spring 23 and the retaining ball 22 are limited in the mounting cavity by the threaded pressure cap 24.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to the embodiments of this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A UBE surgical cannula, comprising a main body (1), characterized in that, It also includes two hollow sleeves (2) disposed on the outside of the main body (1), the hollow sleeves (2) being parallel to the main body (1), the surgical end of the main body (1) having a conical surface (13), the surgical end of the main body (1) having a first arc-shaped incision (11), the center of the first arc-shaped incision (11) being located outside the main body (1), and the edge of the first arc-shaped incision (11) extending to the end face of the surgical end of the main body (1).

2. The UBE surgical cannula according to claim 1, characterized in that, The operating end of the main body (1) is provided with a second arc-shaped cut (12), the center of the second arc-shaped cut (12) is located outside the main body (1), and the edge of the second arc-shaped cut (12) extends to the end face of the operating end of the main body (1).

3. The UBE surgical cannula according to claim 2, characterized in that, The first arc surface cut (11) and the second arc surface cut (12) are offset by 180° in the circumferential direction.

4. The UBE surgical cannula according to claim 2, characterized in that, The axial height of the second arc-shaped cut (12) is greater than the axial height of the first arc-shaped cut (11).

5. The UBE surgical cannula according to claim 4, characterized in that, The height of the main body (1) along the axial direction is 10cm, the height of the second arc-shaped cut (12) along the axial direction is 6cm, and the height of the first arc-shaped cut (11) along the axial direction is 2cm.

6. The UBE surgical cannula according to claim 1, characterized in that, The inner diameter of the hollow sleeve (2) is 2 mm.

7. The UBE surgical cannula according to claim 1, characterized in that, The axial height of the conical section (13) is 5 mm.

8. The UBE surgical cannula according to claim 1, characterized in that, The outer side of the main tube (1) is provided with a guide groove (14), and the outer side of the hollow sleeve (2) is provided with a guide rail (21) that slides in cooperation with the corresponding guide groove (14).

9. The UBE surgical cannula according to claim 8, characterized in that, The guide rail (21) is provided with a ball bearing (22) that floats by a tower-shaped spring (23). The ball bearing (22) can be elastically engaged with the slot located in the corresponding guide groove (14).

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