An integrated lateral dilatation system and method

Abstract

The application relates to the technical field of medical devices, and discloses an integrated lateral road opening system and method, which comprises a three-body split system, the three-body split system comprises a middle expansion arm, a middle expansion sheet, a right expansion arm, a right expansion sheet, a left expansion arm and a left expansion sheet, the middle expansion sheet is installed at one end of the middle expansion arm, the right expansion sheet is installed at one end of the right expansion arm, and the left expansion sheet is installed at one end of the left expansion arm; the integrated lateral road opening system and method provided by the application solve the problem that the prior art may compress or damage the nerve anatomical structure, thereby causing many postoperative complications.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to an integrated lateral dilatation system and method. BACKGROUND

[0002] Traditional spinal surgery generally establishes an implantation channel from the back or the front. In recent years, with the progress of minimally invasive spinal surgery, a lateral dilatation system is usually used to establish an implantation channel from the side to achieve a minimally invasive effect.

[0003] The existing lateral dilatation system, as shown in Figure 1 , Figure 2 , includes a fixed needle 1', a first sleeve 21', a second sleeve 22', a third sleeve 23', a fourth sleeve 24', a right elastic arm 31', a left elastic arm 32', a retractor 4', and a knob 41'.

[0004] The specific operation steps are as follows: first, the fixed needle 1' is placed in the intervertebral disc space and positioned at the most suitable position, then the first sleeve 21', the second sleeve 22', the third sleeve 23', and the fourth sleeve 24' are sequentially inserted to dilate the psoas muscle fibers, the elastic arm 3' is connected with the retractor 4' and is sleeved on the multi-stage sleeve 2', the multi-stage sleeve 2' is removed, and the knob 41' is rotated clockwise to pull the right elastic arm 31' and adjust the size of the channel.

[0005] From the above operation steps of the existing design, it can be seen that the existing lateral dilatation system first needs to insert the fixed needle and continuously insert the multi-stage sleeve, and the process steps of establishing the channel are complicated.

[0006] In addition, the existing system can invaginate the tissue when creating the channel and can squeeze the neural structures near the spine when creating the surgical channel, that is, the instrument can easily compress or damage the neural anatomy during the surgical approach, and the multi-stage sleeve can possibly compress or damage the neural anatomy during the multiple insertion process, thereby causing many postoperative complications. SUMMARY

[0007] The purpose of the present application is to provide an integrated lateral dilatation system and method to solve at least one of the above problems in the prior art.

[0008] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0009] An integrated lateral dilatation system includes a three-piece split system, the three-piece split system includes a middle dilatation arm, a middle dilatation piece, a right dilatation arm, a right dilatation piece, a left dilatation arm, and a left dilatation piece, the middle dilatation piece is installed at one end of the middle dilatation arm, the right dilatation piece is installed at one end of the right dilatation arm, and the left dilatation piece is installed at one end of the left dilatation arm.

[0010] The moving position of the middle expansion sheet includes a middle initial position and a middle working position, and the displacement route between the middle initial position and the middle working position is a middle straight line;

[0011] The moving position of the right expansion sheet includes a right initial position, a right first working position and a right second working position, the displacement route between the right initial position and the right first working position is a right straight line, and the displacement route between the right first working position and the right second working position is a right arc line;

[0012] The moving position of the left expansion sheet includes a left initial position, a left first working position and a left second working position, the displacement route between the left initial position and the left first working position is a left straight line, and the displacement route between the left first working position and the left second working position is a left arc line;

[0013] The swinging position of the right expansion sheet includes a right superimposed state position and a right unfolded state position, and the swinging position of the left expansion sheet includes a left superimposed state position and a left unfolded state position;

[0014] The right expansion sheet in the right superimposed state position and the left expansion sheet in the left superimposed state position and the middle expansion sheet in the middle initial position are in a superimposed state, and the right expansion sheet in the right unfolded state position and the left expansion sheet in the left unfolded state position and the middle expansion sheet in the middle initial position are in a separated state.

[0015] In the technical solution, the intermediate expansion sheet is installed at one end of the intermediate expansion arm, the right expansion sheet is installed at one end of the right expansion arm, and the left expansion sheet is installed at one end of the left expansion arm. The swing position of the right expansion sheet includes a right superimposed state position and a right unfolded state position. The right expansion sheet in the right superimposed state position and the left expansion sheet in the left superimposed state position are in a superimposed state with the intermediate expansion sheet in the intermediate initial position. That is, the three expansion sheets in the superimposed state form a superimposed column, which can be implanted at one time. The superimposed design of the intermediate expansion sheet, the right expansion sheet and the left expansion sheet makes it only need to pass through the lumbar plexus once during the establishment of the channel, which can effectively reduce the risk of nerve damage compared with the existing design of multiple insertions of multiple levels of sleeves. The swing position of the left expansion sheet includes a left superimposed state position and a left unfolded state position. The right expansion sheet in the right unfolded state position and the left expansion sheet in the left unfolded state position are in a separated state with the intermediate expansion sheet in the intermediate initial position, which can facilitate the formation of the initial access channel. The movement position of the intermediate expansion sheet includes an intermediate initial position and an intermediate working position. The displacement route between the intermediate initial position and the intermediate working position is an intermediate straight line. The position of the intermediate expansion sheet can be moved by driving the intermediate expansion arm, so as to adjust the size of the channel from the intermediate position. The movement position of the right expansion sheet includes a right initial position, a right first working position and a right second working position. The displacement route between the right initial position and the right first working position is a right straight line. The displacement route between the right first working position and the right second working position is a right arc line. The position of the right expansion sheet can be moved by driving and swinging the right expansion arm, so as to adjust the size of the channel from the right position. The movement position of the left expansion sheet includes a left initial position, a left first working position and a left second working position. The displacement route between the left initial position and the left first working position is a left straight line. The displacement route between the left first working position and the left second working position is a left arc line. The position of the left expansion sheet can be moved by driving and swinging the left expansion arm, so as to adjust the size of the channel from the left position.

[0016] In summary, the left expansion sheet, the intermediate expansion sheet and the right expansion sheet are driven by the intermediate expansion arm, the right expansion arm and the left expansion arm respectively to move to corresponding positions. At the same time, the positions of the left expansion sheet and the right expansion sheet have a right superimposed state position and a right unfolded state position. The superimposition or separation of the three expansion sheets can be realized by adjusting the swing positions of the left expansion sheet and the right expansion sheet, so that the channel establishment process only needs to pass through the lumbar plexus once, which can effectively reduce the risk of nerve damage, and the size adjustment operation of the channel is more convenient.

[0017] Further, in order to facilitate the matching operation of the expansion catheter and the fixed needle, the intermediate expansion sheet is provided with a catheter channel for facilitating the passage of the expansion catheter, and the expansion catheter is provided with a fixed needle guide rail for facilitating the passage of the fixed needle.

[0018] Further, in order to facilitate the adjustment of the swing angle of the right expansion sheet and the left expansion sheet relative to the right expansion arm and the left expansion arm, right angle adjustable structures are arranged between the right expansion sheet and the right expansion arm, and the left angle adjustable structures are arranged between the left expansion sheet and the left expansion arm.

[0019] Further, in order to facilitate the adjustment of the swing angle of the right expansion sheet and the left expansion sheet, the right angle adjustable structure and the left angle adjustable structure are right and left internal hexagonal knobs, the right expansion sheet is mounted on the right internal hexagonal knob, the left expansion sheet is mounted on the left internal hexagonal knob, and the right and left internal hexagonal knobs are threadedly connected with the right and left expansion arms, respectively.

[0020] Further, it further comprises an intermediate connecting portion, a connecting assembly and a driving assembly, and the right expansion arm and the left expansion arm are both provided with a strip-shaped sliding hole and a first pin shaft between the right expansion arm and the intermediate connecting portion and between the left expansion arm and the intermediate connecting portion.

[0021] The connecting assembly comprises a transverse connection and a U-shaped expansion rod, the transverse connection is located in the intermediate connecting portion, the two ends of the transverse connection are rotatably connected with the other ends of the right and left expansion arms, the right and left expansion arms are respectively provided with inclined sliding holes, the two arms of the U-shaped expansion rod are respectively provided with second pin shafts, the second pin shafts are located in the corresponding inclined sliding holes, the U-shaped expansion rod is located above the intermediate expansion arm, and the intermediate expansion arm is provided with a avoiding groove.

[0022] The driving assembly comprises a first transmission screw, a second transmission screw and a third transmission screw which are coaxially sleeved in sequence, the intermediate connecting portion is rotatably connected with the first transmission screw, the first transmission screw is rotatably connected with the second transmission screw, the second transmission screw is rotatably connected with the third transmission screw, the first transmission screw is threadedly connected with the transverse connection, the second transmission screw is threadedly connected with the U-shaped expansion rod, and the third transmission screw is threadedly connected with the intermediate expansion arm.

[0023] The above structure and operation are achieved by coaxially sleeving the first transmission screw, the second transmission screw and the third transmission screw in sequence, which simplifies the structure design of the driving assembly and makes the operation more convenient.

[0024] Further, in order to facilitate the front and back movement of the right and left expansion arms relative to the middle connecting part, while not affecting the swing of the right and left expansion arms, a first pin shaft is arranged on the right and left expansion arms, and a strip-shaped sliding hole is symmetrically arranged on the middle connecting part.

[0025] Further, in order to provide a middle connecting part with simple structure and convenient assembly of components, the middle connecting part comprises a rear connecting plate, an upper connecting plate and a lower connecting plate, the rear connecting plate is in rotational cooperation with the primary transmission screw, and the transverse connecting part, the right expansion arm, the left expansion arm and the middle expansion arm are located between the upper connecting plate and the lower connecting plate.

[0026] Further, in order to provide a structure design which can facilitate the rotation of the primary transmission screw, the secondary transmission screw and the tertiary transmission screw, a rotating handle is further included, the rotating handle comprises a first-stage rotating handle, a second-stage rotating handle and a third rotating handle arranged in sequence, the first-stage rotating handle is used to drive the rotation of the primary transmission screw, the second-stage rotating handle is used to drive the rotation of the secondary transmission screw, and the third rotating handle is used to drive the rotation of the tertiary transmission screw.

[0027] Further, in order to avoid the rotation handle from being accidentally touched, resulting in the change of the determined expansion channel size, the first-stage rotating handle is detachably connected with the primary transmission screw, the second-stage rotating handle is detachably connected with the secondary transmission screw, and the third rotating handle is detachably connected with the tertiary transmission screw.

[0028] The application further provides an integrated lateral road expansion method, wherein the method comprises the integrated lateral road expansion system and the following steps.

[0029] Inserting the composite column: inserting the expansion catheter on the intervertebral disc gap, and stacking and placing the middle expansion sheet, the right expansion sheet and the left expansion sheet, so that the right expansion sheet is in the right side stacking position, the left expansion sheet is in the left side stacking position, and the middle expansion sheet, the right expansion sheet and the left expansion sheet are in the stacking state to form a composite column, so that the catheter channel passes through the expansion catheter, and the insertion of the composite column is completed.

[0030] Inserting the fixing needle: inserting the fixing needle into the fixing needle guide rail of the expansion catheter, so that the fixing needle is fixed in the intervertebral disc gap.

[0031] Forming a preliminary access channel: removing the expansion catheter, and adjusting the rotation of the right expansion sheet and the left expansion sheet through the right and left angle adjustable structures respectively, until the right expansion sheet is in the right side unfolding state, and the left expansion sheet is in the left side unfolding state, so that a preliminary access channel is formed between the right expansion sheet, the left expansion sheet and the middle expansion sheet.

[0032] Firstly adjust the size of the approach channel: rotate the first level transmission screw, with the rotation of the first level transmission screw, the horizontal connection drive right side expansion arm moves from the right side initial position to the right side first working position, at the same time, the horizontal connection drive left side expansion arm moves from the left side initial position to the left side first working position;

[0033] Secondly adjust the size of the approach channel: rotate the second level transmission screw, with the rotation of the second level transmission screw, the U-shaped expansion rod drive right side expansion arm moves from the right side first working position to the right side second working position, at the same time, the U-shaped expansion rod drive left side expansion arm moves from the left side first working position to the left side second working position;

[0034] Thirdly adjust the size of the approach channel: rotate the third level transmission screw, with the rotation of the third level transmission screw, the middle expansion arm moves from the middle initial position to the middle working position.

[0035] The beneficial effects of the present application are: in the technical solution, the intermediate expansion sheet is installed at one end of the intermediate expansion arm, the right side expansion sheet is installed at one end of the right side expansion arm, and the left side expansion sheet is installed at one end of the left side expansion arm, the swing position of the right side expansion sheet includes a right side superposition state position and a right side unfolding state position, the right side expansion sheet in the right side superposition state position and the left side expansion sheet in the left side superposition state position are in a superposition state with the intermediate expansion sheet in the intermediate initial position, that is, the three expansion sheets in the superposition state form a superposition column, which can realize the implantation of the superposition column at one time, the superposition design of the intermediate expansion sheet, the right side expansion sheet and the left side expansion sheet makes the process of establishing a channel only need to pass through the lumbar plexus once, which can effectively reduce the risk of nerve damage compared with the existing design of multiple insertions of multiple levels of sleeves; since the swing position of the left side expansion sheet includes a left side superposition state position and a left side unfolding state position, the right side expansion sheet in the right side unfolding state position and the left side expansion sheet in the left side unfolding state position are in a separated state with the intermediate expansion sheet in the intermediate initial position, which can facilitate the formation of a preliminary access channel. Since the moving position of the intermediate expansion sheet includes an intermediate initial position and an intermediate working position, the displacement route between the intermediate initial position and the intermediate working position is an intermediate straight line, which facilitates the position movement of the intermediate expansion sheet by driving the intermediate expansion arm, so as to adjust the size of the channel from the intermediate position. Since the moving position of the right side expansion sheet includes a right side initial position, a right side first working position and a right side second working position, the displacement route between the right side initial position and the right side first working position is a right side straight line, and the displacement route between the right side first working position and the right side second working position is a right side arc line, which facilitates the position movement of the right side expansion sheet by driving and swinging the right side expansion arm, so as to facilitate the adjustment of the size of the channel from the right side position. Since the moving position of the left side expansion sheet includes a left side initial position, a left side first working position and a left side second working position, the displacement route between the left side initial position and the left side first working position is a left side straight line, and the displacement route between the left side first working position and the left side second working position is a left side arc line, which facilitates the position movement of the left side expansion sheet by driving and swinging the left side expansion arm, so as to facilitate the adjustment of the size of the channel from the left side position.

[0036] In summary, by driving the left side expansion sheet, the intermediate expansion sheet and the right side expansion sheet to move to the corresponding positions through the intermediate expansion arm, the right side expansion arm and the left side expansion arm respectively, and at the same time, the positions of the left side expansion sheet and the right side expansion sheet have the right side superposition state position and the right side unfolding state position, the superposition or separation of the three expansion sheets can be realized by adjusting the swing positions of the left side expansion sheet and the right side expansion sheet, so that the process of establishing a channel only needs to pass through the lumbar plexus once, which can effectively reduce the risk of nerve damage, and the size adjustment operation of the channel is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 Structure diagram of the first state of the prior art design;

[0038] Figure 2 Structure diagram of the second state of the prior art design;

[0039] Figure 3 Structure diagram of the first state of the present application;

[0040] Figure 4 Structure diagram of the first perspective of the state of the cooperation of the dilating catheter in the present application;

[0041] Figure 5 Structure diagram of the second perspective of the state of the cooperation of the dilating catheter in the present application;

[0042] Figure 6 Structure diagram of the state of forming the preliminary access channel in the present application;

[0043] Figure 7 Structure diagram of the state of forming the access channel completely in the present application;

[0044] Figure 8 Structure diagram of the first state of the partial assembly in the present application;

[0045] Figure 9 Structure diagram of the second state of the partial assembly in the present application;

[0046] Figure 10 Structure diagram of another perspective of the present application;

[0047] Figure 11 Structure diagram of the state of adjusting the access in the present application;

[0048] Figure 12 Structure diagram of the dilating catheter in the present application;

[0049] Figure 13 Structure diagram of the state of inserting the dilating catheter into the intervertebral disc space in the present application;

[0050] Figure 14 Structure diagram of the fixation needle in the present application.

[0051] In the diagram: 1. Middle dilator arm; 2. Middle dilator plate; 3. Right dilator arm; 4. Right dilator plate; 5. Left dilator arm; 6. Left dilator plate; 7. Middle initial position; 8. Middle working position; 9. Middle straight line; 10. Right initial position; 11. Right first working position; 12. Right second working position; 13. Right straight line; 14. Right arc; 15. Left initial position; 16. Left first working position; 17. Left second working position; 18. Left straight line; 19. Left arc; 20. Right overlapping position; 21. Right unfolded position; 22. Left overlapping position; 23. Left unfolded position; 24. Dilator catheter 2 4; Conduit channel 25; Fixing pin 26; Fixing pin guide rail 27; Right hexagonal knob 28; Left hexagonal knob 29; Middle connecting part 30; Upper connecting plate 30.1; Lower connecting plate 30.2; Rear connecting plate 30.3; Strip-shaped sliding hole 31; First pin 32; Horizontal connector 33; Slanted sliding hole 34; U-shaped expansion rod 35; Second pin 36; Clearance groove 37; First-stage transmission screw 38; Second-stage transmission screw 39; Third-stage transmission screw 40; Rotating handle 41; First-stage rotating handle 41.1; Second-stage rotating handle 41.2; Third-stage rotating handle 41.3. Detailed Implementation

[0052] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0053] Example 1:

[0054] like Figures 3-14 As shown, this embodiment provides an integrated side road opening system, including a three-body segmented system. The three-body segmented system includes a middle expansion arm 1, a middle expansion piece 2, a right expansion arm 3, a right expansion piece 4, a left expansion arm 5, and a left expansion piece 6. The middle expansion piece 2 is installed at one end of the middle expansion arm 1, the right expansion piece 4 is installed at one end of the right expansion arm 3, and the left expansion piece 6 is installed at one end of the left expansion arm 5.

[0055] like Figure 11 As shown, the moving positions of the intermediate expansion piece 2 include the intermediate initial position 7 and the intermediate working position 8, and the displacement path between the intermediate initial position 7 and the intermediate working position 8 is the intermediate straight line 9.

[0056] The moving positions of the right side expansion sheet 4 include a right side initial position 10, a right side first working position 11 and a right side second working position 12, the displacement route between the right side initial position 10 and the right side first working position 11 is a right side straight line 13, and the displacement route between the right side first working position 11 and the right side second working position 12 is a right side arc line 14;

[0057] The moving positions of the left side expansion sheet 6 include a left side initial position 15, a left side first working position 16 and a left side second working position 17, the displacement route between the left side initial position 15 and the left side first working position 16 is a left side straight line 18, and the displacement route between the left side first working position 16 and the left side second working position 17 is a left side arc line 19;

[0058] The swinging positions of the right side expansion sheet 4 include a right side superimposed state position 20 and a right side unfolded state position 21, and the swinging positions of the left side expansion sheet 6 include a left side superimposed state position 22 and a left side unfolded state position 23;

[0059] The right side expansion sheet 4 at the right side superimposed state position 20 and the left side expansion sheet 6 at the left side superimposed state position 22 are in a superimposed state with the middle expansion sheet 2 at the middle initial position 7, and the right side expansion sheet 4 at the right side unfolded state position 21 and the left side expansion sheet 6 at the left side unfolded state position 23 are in a separated state with the middle expansion sheet 2 at the middle initial position 7.

[0060] The intermediate expansion piece 2 is installed at one end of the intermediate expansion arm 1, the right expansion piece 4 is installed at one end of the right expansion arm 3, and the left expansion piece 6 is installed at one end of the left expansion arm 5, the swing position of the right expansion piece 4 includes a right side overlapping state position 20 and a right side unfolding state position 21, the right expansion piece 4 located at the right side overlapping state position 20 and the left expansion piece 6 located at the left side overlapping state position 22 are in an overlapping state with the intermediate expansion piece 2 located at the intermediate initial position 7, that is, the three expansion pieces in the overlapping state form an overlapping column, which can realize the implantation of the overlapping column at one time, the overlapping design of the intermediate expansion piece 2, the right expansion piece 4 and the left expansion piece 6 makes the process of establishing a channel only need to pass through the lumbar plexus once, compared with the existing design of multiple insertions of multiple cannulas, which can effectively reduce the risk of nerve damage; since the swing position of the left expansion piece 6 includes a left side overlapping state position 22 and a left side unfolding state position 23, the right expansion piece 4 located at the right side unfolding state position 21 and the left expansion piece 6 located at the left side unfolding state position 23 are in a separated state with the intermediate expansion piece 2 located at the intermediate initial position 7, which can facilitate the formation of a preliminary access channel. Since the movement position of the intermediate expansion piece 2 includes an intermediate initial position 7 and an intermediate working position 8, the displacement route between the intermediate initial position 7 and the intermediate working position 8 is an intermediate straight line 9, which facilitates the movement of the position of the intermediate expansion piece 2 by driving the intermediate expansion arm 1, so as to adjust the size of the channel from the intermediate position. Since the movement position of the right expansion piece 4 includes a right side initial position 10, a right side first working position 11 and a right side second working position 12, the displacement route between the right side initial position 10 and the right side first working position 11 is a right side straight line 13, and the displacement route between the right side first working position 11 and the right side second working position 12 is a right side arc line 14, which facilitates the movement of the position of the right expansion piece 4 by driving and swinging the right expansion arm 3, so as to facilitate the adjustment of the size of the channel from the right side position. Since the movement position of the left expansion piece 6 includes a left side initial position 15, a left side first working position 16 and a left side second working position 17, the displacement route between the left side initial position 15 and the left side first working position 16 is a left side straight line 18, and the displacement route between the left side first working position 16 and the left side second working position 17 is a left side arc line 19, which facilitates the movement of the position of the left expansion piece 6 by driving and swinging the left expansion arm 5, so as to facilitate the adjustment of the size of the channel from the left side position.

[0061] In summary, the intermediate expansion arm 1, the right expansion arm 3 and the left expansion arm 5 drive the left expansion sheet 6, the intermediate expansion sheet 2 and the right expansion sheet 4 to move respectively, and at the same time, the positions of the left expansion sheet 6 and the right expansion sheet 4 have the right superimposed state position 20 and the right unfolded state position 21, so that the superposition or separation of the three expansion sheets can be realized by adjusting the swing positions of the left expansion sheet 6 and the right expansion sheet 4, thereby reducing the risk of nerve damage and making the size adjustment operation of the channel more convenient.

[0062] Embodiment 2:

[0063] This embodiment is optimized on the basis of the above-mentioned embodiment 1.

[0064] In order to facilitate the matching operation of the expansion catheter 24 and the fixed needle 26, the intermediate expansion sheet 2 is provided with a catheter passage 25 for facilitating the passage of the expansion catheter 24, and the expansion catheter 24 is provided with a fixed needle guide rail 27 for facilitating the passage of the fixed needle 26.

[0065] Embodiment 3:

[0066] This embodiment is optimized on the basis of the above-mentioned embodiment 2.

[0067] In order to facilitate the adjustment of the swing angle of the right expansion sheet 4 and the left expansion sheet 6 relative to the right expansion arm 3 and the left expansion arm 3, a right angle adjustable structure is arranged between the right expansion sheet 4 and the right expansion arm 3, and the right angle adjustable structure can adjust the swing position of the right expansion sheet 4; a left angle adjustable structure is arranged between the left expansion sheet 6 and the left expansion arm 5, and the left angle adjustable structure can adjust the swing position of the left expansion sheet 6.

[0068] Embodiment 4:

[0069] This embodiment is optimized on the basis of the above-mentioned embodiment 3.

[0070] In order to facilitate the angle adjustment operation of the right expansion sheet 4 and the left expansion sheet 6, the right angle adjustable structure and the left angle adjustable structure are respectively a right internal hexagonal knob 28 and a left internal hexagonal knob 29, the right expansion sheet 4 is installed on the right internal hexagonal knob 28, and the left expansion sheet 6 is installed on the left internal hexagonal knob 29, and the right internal hexagonal knob 28 and the left internal hexagonal knob 29 are respectively screwed with the right expansion arm 3 and the left expansion arm 5.

[0071] Embodiment 5:

[0072] This embodiment is optimized on the basis of the above-mentioned embodiment 3.

[0073] It also includes an intermediate connecting part 30, a connecting assembly and a driving assembly, such asFigure 10 As shown, a strip-shaped sliding hole 31 and a first pin 32 are provided between the right expansion arm 3 and the middle connecting part 30, and between the left expansion arm 5 and the middle connecting part 30. The first pin 32 is located inside the strip-shaped sliding hole 31.

[0074] like Figure 8 , Figure 9 As shown, the connecting assembly includes a horizontal connector 33 and a U-shaped expansion rod 35. The horizontal connector 33 is located in the middle connecting part 30. The two ends of the horizontal connector 33 are rotatably connected to the other ends of the right expansion arm 3 and the left expansion arm 5, respectively. The right expansion arm 3 and the left expansion arm 5 are respectively provided with oblique sliding holes 34. The ends of the two arms of the U-shaped expansion rod 35 are respectively provided with second pins 36. The second pins 36 are located in the corresponding oblique sliding holes 34. The U-shaped expansion rod 35 is located above the middle expansion arm 1. The middle expansion arm 1 is provided with a clearance groove 37. The driving assembly is located in the clearance groove 37.

[0075] The drive assembly includes a primary transmission screw 38, a secondary transmission screw 39, and a tertiary transmission screw 40, which are coaxially arranged in sequence. The intermediate connecting part 30 is rotatably engaged with the primary transmission screw 38, the primary transmission screw 38 is rotatably engaged with the secondary transmission screw 39, the secondary transmission screw 39 is rotatably engaged with the tertiary transmission screw 40, the primary transmission screw 38 is threadedly connected to the transverse connecting 33, the secondary transmission screw 39 is threadedly connected to the U-shaped expansion rod 35, and the tertiary transmission screw 40 is threadedly connected to the intermediate expansion arm 1.

[0076] Specifically, in actual operation, the intermediate connecting part 30 remains stationary. The intermediate connecting part 30 facilitates the assembly and installation of the intermediate expansion arm 1, the right expansion arm 3, and the left expansion arm 5, and also facilitates the installation in conjunction with the drive assembly.

[0077] In use, the first-stage transmission screw 38 is driven first. Since the first-stage transmission screw 38 is threadedly connected to the transverse connection 33, there are strip-shaped sliding holes 31 and first pins 32 between the right expansion arm 3 and the middle connecting part 30, and between the left expansion arm 5 and the middle connecting part 30. The first pins 32 are located in the strip-shaped sliding holes 31. The two ends of the transverse connection 33 are rotatably connected to the other ends of the right expansion arm 3 and the left expansion arm 5, respectively. Thus, the right expansion arm 3 and the left expansion arm 5 can move back and forth through the transverse connection 33, thereby realizing the first adjustment of the channel size.

[0078] Then drive the secondary transmission screw 39. Since the secondary transmission screw 39 is threadedly connected to the U-shaped expansion rod 35, rotating the secondary transmission screw 39 and moving the U-shaped expansion rod 35 back and forth can open the left expansion arm 5 and the right expansion arm 3 to achieve a second adjustment of the channel size.

[0079] Then drive the third transmission screw rod 40, because the third transmission screw rod 40 is threadedly connected with the middle expansion arm 1, and the U-shaped expansion rod 35 is located above the middle expansion arm 1, so the third transmission screw rod 40 can adjust the front and back positions of the middle expansion arm 1 to realize the third adjustment of the channel size.

[0080] In summary, the above structure operation is simplified by the coaxial sleeve of the first transmission threaded rod 38, the second transmission threaded rod 39 and the third transmission threaded rod 40, which simplifies the structure design of the driving assembly and is more convenient to operate.

[0081] Embodiment 6:

[0082] This embodiment is optimized on the basis of the above-mentioned embodiment 5.

[0083] In order to facilitate the front and back movement of the right expansion arm 3 and the left expansion arm 5 relative to the middle connecting part 30, and at the same time not to affect the swing of the right expansion arm 3 and the left expansion arm 5, the first pin shaft 32 is arranged on the right expansion arm 3 and the left expansion arm 5 respectively, and the strip-shaped sliding hole 31 is symmetrically arranged on the middle connecting part 30.

[0084] Embodiment 7:

[0085] This embodiment is optimized on the basis of the above-mentioned embodiment 5.

[0086] As shown in Figure 10 In order to provide a middle connecting part 30 with simple structure and convenient structure assembly between components, the middle connecting part 30 includes a rear connecting plate 30.3, an upper connecting plate 30.1 and a lower connecting plate 30.2, the rear connecting plate 30.3 is rotationally matched with the first transmission screw rod 38, and the horizontal connection 33, the right expansion arm 3, the left expansion arm 5 and the middle expansion arm 1 are located between the upper connecting plate 30.1 and the lower connecting plate 30.2.

[0087] Embodiment 8:

[0088] This embodiment is optimized on the basis of the above-mentioned embodiment 5.

[0089] In order to provide a structure design which can facilitate the rotation of the first transmission screw rod 38, the second transmission screw rod 39 and the third transmission screw rod 40 respectively, a rotating handle 41 is further included, the rotating handle 41 includes a first-stage rotating handle 41.1, a second-stage rotating handle 41.2 and a third-stage rotating handle 41.3 arranged in sequence, the first-stage rotating handle 41.1 is used to drive the rotation of the first transmission screw rod 38, the second-stage rotating handle 41.2 is used to drive the rotation of the second transmission screw rod 39, and the third-stage rotating handle 41.3 is used to drive the rotation of the third transmission screw rod 40.

[0090] Embodiment 9:

[0091] This embodiment is based on the optimization of the above-mentioned embodiment 8.

[0092] In order to avoid accidental rotation of the handle and change the determined expansion channel size, the first-stage rotating handle 41.1 is detachably connected with the first-stage transmission screw 38, the second-stage rotating handle 41.2 is detachably connected with the second-stage transmission screw 39, and the third-stage rotating handle 41.3 is detachably connected with the third-stage transmission screw 40.

[0093] Specifically, the end of the first-stage transmission screw 38, the second-stage transmission screw 39 and the third-stage transmission screw 40 extending out of the intermediate connecting part 30 is a butt joint column with multiple edges, and the first-stage rotating handle 41.1, the second-stage rotating handle 41.2 and the third-stage rotating handle 41.3 are respectively butt jointed with the corresponding butt joint column to realize detachable installation.

[0094] In order to realize more compact installation of the rotating handle, the first-stage rotating handle 41.1 is rotationally matched with the second-stage rotating handle 41.2, and the second-stage rotating handle 41.2 is rotationally matched with the third-stage rotating handle 41.3.

[0095] Embodiment 10:

[0096] The application also provides an integrated lateral road expansion method, which comprises an integrated lateral road expansion system and the following steps.

[0097] Inserting the superposed column: as shown in the figure, inserting the expansion catheter 24 on the intervertebral disc gap, as shown in the figure, placing the middle expansion sheet 2, the right expansion sheet 4 and the left expansion sheet 6 in a superposed manner, so that the right expansion sheet 4 is in the right superposed position 20, the left expansion sheet 6 is in the left superposed position, and the middle expansion sheet 2, the right expansion sheet 4 and the left expansion sheet 6 are in a superposed state to form a superposed column, as shown in the figure, so that the catheter channel 25 passes through the expansion catheter 24, and the insertion of the superposed column is completed; Figure 13 Figure 3 Inserting the fixed needle: as shown in the figure, inserting the fixed needle 26 into the fixed needle guide rail 27 of the expansion catheter 24, so that the fixed needle 26 is fixed in the intervertebral disc gap; Figure 4 Forming a preliminary access channel: as shown in the figure, inserting the fixed needle 26 into the fixed needle guide rail 27 of the expansion catheter 24, so that the fixed needle 26 is fixed in the intervertebral disc gap;

[0098] Figure 5 Forming a preliminary access channel: as shown in the figure, inserting the fixed needle 26 into the fixed needle guide rail 27 of the expansion catheter 24, so that the fixed needle 26 is fixed in the intervertebral disc gap;

[0099] Forming a preliminary access channel: as shown in the figure, inserting the fixed needle 26 into the fixed needle guide rail 27 of the expansion catheter 24, so that the fixed needle 26 is fixed in the intervertebral disc gap; Figure 6 ​​As shown, remove the expansion catheter 24, adjust the right and left angle adjustable structure respectively to rotate the right and left expansion pieces 4 and 6 until the right expansion piece 4 is in the right side unfolded state 21 and the left expansion piece 6 is in the left side unfolded state, so as to form a preliminary access channel between the right and left expansion pieces 4 and 6 and the middle expansion piece 2. Specifically, the right and left expansion pieces 4 and 6 can be rotated to form a preliminary access channel by rotating the right and left inner hexagonal knobs 28 and 29 respectively through a matching screwdriver.

[0100] The first adjustment of the size of the access channel is as follows: Figure 7 As shown, by rotating the first-stage transmission screw rod 38 by operating the first-stage rotary handle 41.1, the horizontal connection 33 drives the right expansion arm 3 to move from the right side initial position 10 to the right side first working position 11, and at the same time, the horizontal connection 33 drives the left expansion arm 5 to move from the left side initial position 15 to the left side first working position 16, thereby achieving the first adjustment of the size of the access channel.

[0101] The second adjustment of the size of the access channel is as follows: Figure 7 As shown, by rotating the second-stage transmission screw rod 39 by operating the second-stage rotary handle 41.2, the U-shaped expansion rod 35 drives the right expansion arm 3 to move from the right side first working position 11 to the right side second working position 12, and at the same time, the U-shaped expansion rod 35 drives the left expansion arm 5 to move from the left side first working position 16 to the left side second working position 17, thereby achieving the second adjustment of the size of the access channel.

[0102] The third adjustment of the size of the access channel is as follows: Figure 7 As shown, by rotating the third-stage transmission screw rod 40 by operating the third-stage rotary handle 41.3, the middle expansion arm 1 moves from the middle initial position 7 to the middle working position 8, thereby achieving the third adjustment of the size of the access channel.

[0103] It should be noted that the doctor in the operation determines the size of the required channel according to the size of the implant, and the determination of the size of the channel is a necessary step of the operation, because the appropriate size is conducive to the implantation of the implant through the expanded channel into the human body. By the above-mentioned rotating operation of the rotary handle 41, the positions and swing angles of the three expansion pieces are adjusted to achieve the ideal channel size required by the doctor. After adjusting the size of the channel, the rotary handle 41 is disassembled, and then the fusion cage is implanted. The rotary handle 41 is disassembled to avoid accidental contact with the rotary handle 41 during the operation, which may change the size of the channel that has been determined.

[0104] It should be noted that the technical scheme provides a safe and efficient access method for lateral access surgery, and can maintain the access during the entire operation.

[0105] The three expansion pieces can be stacked, and the process of establishing a channel only needs to pass through the lumbar plexus once, which can effectively reduce the risk of nerve damage.

[0106] The three-piece segmentation system and the detachable rotating handle are integrated and adjustable, which makes it easier to operate during the operation, reduces the operation time, and is convenient to adjust.

[0107] It should be noted that the material of the three-piece segmentation system can be selected from biocompatible materials.

[0108] In addition, the rotation of one or all of the rotating handles of the detachable rotating handle can also be achieved in a telescopic manner to control the three-piece segmentation system.

[0109] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An integrated lateral dilation system, characterized by: The three-body fragmentation system comprises a middle expansion arm, a middle expansion sheet, a right expansion arm, a right expansion sheet, a left expansion arm and a left expansion sheet, the middle expansion sheet is installed at one end of the middle expansion arm, the right expansion sheet is installed at one end of the right expansion arm, and the left expansion sheet is installed at one end of the left expansion arm; The moving position of the middle expansion sheet comprises a middle initial position and a middle working position, and the displacement route between the middle initial position and the middle working position is a middle straight line; The moving position of the right expansion sheet comprises a right initial position, a right first working position and a right second working position, the displacement route between the right initial position and the right first working position is a right straight line, and the displacement route between the right first working position and the right second working position is a right arc line; The moving position of the left expansion sheet comprises a left initial position, a left first working position and a left second working position, the displacement route between the left initial position and the left first working position is a left straight line, and the displacement route between the left first working position and the left second working position is a left arc line; The swinging position of the right expansion sheet comprises a right superimposed state position and a right unfolded state position, and the swinging position of the left expansion sheet comprises a left superimposed state position and a left unfolded state position; The right expansion sheet in the right superimposed state position and the left expansion sheet in the left superimposed state position are in a superimposed state with the middle expansion sheet in the middle initial position, and the right expansion sheet in the right unfolded state position and the left expansion sheet in the left unfolded state position are in a separated state with the middle expansion sheet in the middle initial position.

2. An integrated lateral dilation system according to claim 1, wherein: A catheter channel is arranged on the middle expansion sheet to facilitate the passage of an expansion catheter, and a fixed needle guide rail is arranged on the expansion catheter to facilitate the passage of a fixed needle.

3. An integrated lateral dilation system according to claim 2, wherein: A right angle adjustable structure is arranged between the right expansion sheet and the right expansion arm, and the right angle adjustable structure can adjust the swinging position of the right expansion sheet; a left angle adjustable structure is arranged between the left expansion sheet and the left expansion arm, and the left angle adjustable structure can adjust the swinging position of the left expansion sheet.

4. An integrated lateral dilation system according to claim 3, wherein: The right angle adjustable structure and the left angle adjustable structure are right and left inner hexagonal knobs respectively, the right expansion sheet is installed on the right inner hexagonal knob, the left expansion sheet is installed on the left inner hexagonal knob, and the right and left inner hexagonal knobs are threadedly connected with the right and left expansion arms respectively.

5. An integrated lateral dilation system according to claim 3, wherein: A middle connecting part, a connecting assembly and a driving assembly are further included, a strip-shaped sliding hole and a first pin shaft are arranged between the right expansion arm and the middle connecting part and between the left expansion arm and the middle connecting part, and the first pin shaft is located in the strip-shaped sliding hole; The connecting assembly comprises a cross connection and a U-shaped expansion rod, the cross connection is located in the middle connecting part, two ends of the cross connection are rotatably connected with the other end of the right expansion arm and the left expansion arm respectively, the right expansion arm and the left expansion arm are respectively provided with inclined sliding holes, the two arms of the U-shaped expansion rod are respectively provided with second pin shafts, the second pin shafts are located in the corresponding inclined sliding holes, the U-shaped expansion rod is located above the middle expansion arm, the middle expansion arm is provided with an avoiding groove; The driving assembly comprises a first-stage transmission screw, a second-stage transmission screw and a third-stage transmission screw which are coaxially sleeved in sequence, the middle connecting part is rotatably connected with the first-stage transmission screw, the first-stage transmission screw is rotatably connected with the second-stage transmission screw, the second-stage transmission screw is rotatably connected with the third-stage transmission screw, the first-stage transmission screw is threadedly connected with the cross connection, the second-stage transmission screw is threadedly connected with the U-shaped expansion rod, and the third-stage transmission screw is threadedly connected with the middle expansion arm.

6. An integrated lateral dilation system according to claim 5, wherein: The right expansion arm and the left expansion arm are respectively provided with first pin shafts, and the middle connecting part is symmetrically provided with strip-shaped sliding holes.

7. An integrated lateral dilation system according to claim 5, wherein: The middle connecting part comprises a rear connecting plate, an upper connecting plate and a lower connecting plate, the rear connecting plate is rotatably connected with the first-stage transmission screw, and the cross connection, the right expansion arm, the left expansion arm and the middle expansion arm are located between the upper connecting plate and the lower connecting plate.

8. An integrated lateral dilation system according to claim 5, wherein: The rotating handle comprises first-stage rotating handle, second-stage rotating handle and third-stage rotating handle which are sequentially arranged, the first-stage rotating handle is used for driving the first-stage transmission screw to rotate, the second-stage rotating handle is used for driving the second-stage transmission screw to rotate, and the third-stage rotating handle is used for driving the third-stage transmission screw to rotate.

9. An integrated lateral dilation system according to claim 8, wherein: The first-stage rotating handle is detachably connected with the first-stage transmission screw, the second-stage rotating handle is detachably connected with the second-stage transmission screw, and the third-stage rotating handle is detachably connected with the third-stage transmission screw.

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