Dual-purpose spine channel type retractor with adjustable angle and depth

Abstract

The invention discloses a dual-purpose spine channel type retractor with adjustable angle and depth. The dual-purpose spine channel type retractor comprises a clamping piece seat, a clamping piece, a movable seat and a fixed guide rail, wherein the two clamping piece seats are symmetrically arranged, and inner cavities penetrating through the clamping piece seats are formed in the clamping piece seats in the vertical directions of the clamping piece seats; the clamping piece can be inserted into the inner cavity, and the clamping piece can move in the inner cavity in the vertical direction of the clamping piece seat so as to adjust the length of the part, exposed out of the clamping piece seat, of the clamping piece; the two clamping piece seats are respectively provided with a moving seat, a rotating shaft is arranged at the edge of each clamping piece seat along the horizontal direction, a rotating hole is formed in each moving seat, and the rotating shafts are in clearance fit with the rotating holes to adjust the angle of the clamping pieces inserted into the affected part; sliding grooves penetrating through the two moving seats are formed in the moving seats, the two moving seats are arranged at the two ends of the fixed guide rail through the sliding grooves respectively and connected with the fixed guide rail in a sliding mode so that the distance between the two moving seats can be adjusted, and by adjusting the distance between the two moving seats, the space formed between the two clamping pieces can meet the use requirement of a minimally invasive channel or a retractor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of surgical auxiliary instruments, in particular to a two-purpose spinal channel type retractor with adjustable angle and depth. BACKGROUND

[0002] For minimally invasive surgery of degenerative diseases such as herniated disc or intraspinal tumors, a minimally invasive channel or a spinal retractor is needed.

[0003] The minimally invasive channel currently used in clinical practice is a special tubular or sleeve type structure, which needs to be implanted through a surgical incision to establish an operating space. The retractor, as the core instrument for pulling soft tissue, needs to be used in cooperation with the minimally invasive channel, but the two are not integrated design, and completely belong to independent instruments. When the surgical scene needs to switch from minimally invasive channel operation to open operation (such as finding complex bone spurs and dural sac adhesion under the minimally invasive channel, which needs to be expanded to open for cleaning), the minimally invasive channel must be replaced with a retractor, and this replacement process will cause multiple clinical problems: 1) The operation time is significantly prolonged. The replacement of instruments during the operation needs to go through the steps of removing the minimally invasive channel, sterilizing the surgical area, installing the open surgery retractor, and calibrating the pulling position. The long operation time will increase the risk of anesthesia for the patient, and indirectly increase the probability of complications by prolonging the exposure time of the surgical area.

[0004] 2) The minimally invasive channel function fails and the tissue is damaged again. Once the minimally invasive channel is removed, the soft tissue it has expanded will quickly rebound, causing the established operating space to be completely closed. If the minimally invasive channel needs to be used again, it needs to be re-cut and implanted into the channel, causing secondary tissue trauma.

[0005] In summary, in the prior art, the minimally invasive channel and the retractor are independent surgical instruments. When the minimally invasive surgery is converted to open surgery during the operation, the minimally invasive channel needs to be replaced with a retractor in time, which prolongs the operation time and increases the risk of surgery. SUMMARY

[0006] The purpose of the present application is to provide a two-purpose spinal channel type retractor with adjustable angle and depth to solve the technical problem in the prior art that when the minimally invasive surgery is converted to open surgery during the operation, the minimally invasive channel needs to be replaced with a retractor in time, which prolongs the operation time and increases the risk of surgery.

[0007] To solve the above technical problems, the present application specifically provides the following technical solutions: A two-purpose spinal channel type retractor with adjustable angle and depth, comprising: Two symmetrically arranged clamping piece seats, which are arc-shaped columns and have through holes in the vertical direction of the seats; a clamping piece, which can be inserted into the through hole and can move in the vertical direction of the seat to adjust the length of the clamping piece exposed outside the seat; a moving seat, which is arranged on each of the two clamping piece seats, and the edge of the seat is provided with a rotating shaft in the horizontal direction, the moving seat is provided with a rotating hole, and the rotating shaft and the rotating hole are clearance fitted to adjust the angle of the clamping piece inserted into the affected area; the moving seat is provided with a first threaded hole in the direction perpendicular to the rotating hole and penetrating the rotating hole, and the first threaded hole is threadedly connected with a first locking bolt; a fixed guide rail, which is provided with a sliding groove penetrating the guide rail, and the two moving seats are arranged at the two ends of the fixed guide rail through the sliding groove and are slidably connected with the fixed guide rail to adjust the distance between the two moving seats; the moving seat is provided with a second threaded hole in the direction perpendicular to the sliding groove and penetrating the sliding groove, and the second threaded hole is threadedly connected with a second locking bolt; by adjusting the distance between the two moving seats, the space formed between the two clamping pieces can meet the use requirements of a minimally invasive channel or a retractor.

[0008] Further, the through hole is provided with a bolt seat in the vertical direction of the through hole, the bolt seat is provided with a countersunk hole penetrating the bolt seat, the countersunk hole is provided with an adjusting bolt, the shank of the adjusting bolt is rotationally connected with the countersunk hole, and the head of the adjusting bolt is clamped in the countersunk end of the countersunk hole, the countersunk end is provided with a stop ring to limit the head in the countersunk hole; the top of the clamping piece is provided with a threaded hole in the vertical direction, and the adjusting bolt can be threadedly connected with the threaded hole, and the clamping piece can move in the vertical direction of the seat by rotating the adjusting bolt.

[0009] Further, a convex strip is arranged in the vertical direction of the through hole, and the surface of the clamping piece is provided with an inner groove in the vertical direction at the corresponding position and matched with the convex strip, so that the clamping piece can be inserted into the through hole from the bottom of the through hole in the state that the convex strip and the inner groove are clamped, and the adjusting bolt and the threaded hole are located on the same straight line.

[0010] Further, the clamping piece includes a plurality of clamping pieces with different widths, and the clamping pieces are detachably connected with the through hole.

[0011] Further, the two ends of the fixed guide rail are provided with detachable extension guide rails; the end of the fixed guide rail is provided with a slot, and the end of the extension guide rail is provided with a plug, and the plug is inserted into the slot to connect the fixed guide rail and the extension guide rail into one whole.

[0012] Further, the fixed guide rail is provided with a first through hole penetrating the insertion slot, the plug is provided with a second through hole, and when the plug is inserted into the insertion slot, the first through hole and the second through hole are in communication; wherein the through hole is divided into two parts by the insertion slot, and is respectively provided as a smooth part and a threaded part, and a bolt is sequentially penetrated through the smooth part of the first through hole and the second through hole and is threadedly connected with the threaded part of the first through hole.

[0013] Further, the fixed guide rail is provided with a first through hole penetrating the insertion slot, the plug is provided with a second through hole, and when the plug is inserted into the insertion slot, the first through hole and the second through hole are in communication; wherein the through hole is divided into two parts by the insertion slot, and is respectively provided as a smooth part and a threaded part, and a bolt is sequentially penetrated through the smooth part of the first through hole and the second through hole and is threadedly connected with the threaded part of the first through hole.

[0014] Further, the top of the clamping piece seat is provided with a concave sliding groove at the slot of the inner cavity, and a support assembly is detachably connected in the concave sliding groove, and the support assembly is used for mounting surgical auxiliary tools.

[0015] Further, the support assembly comprises a support, a connecting rod and a sliding seat, two ends of the connecting rod are respectively connected with the support and the sliding seat, the support is used for mounting surgical auxiliary tools, the sliding seat is a convex structure, and the sliding seat can be clamped in the concave sliding groove and can slide along the concave sliding groove; wherein the clamping piece seat is provided with a notch in communication with the concave sliding groove, so that the sliding seat can enter the concave sliding groove through the notch.

[0016] Further, one side of the sliding seat is provided with a right-angle clamp plate, so that there is a space between the right-angle support and the sliding seat for clamping the side wall of the clamping piece seat, and a locking bolt is threadedly connected on the right-angle clamp plate, and the locking bolt is arranged to abut against the side wall of the clamping piece seat when the locking bolt is tightened.

[0017] Compared with the prior art, the present application has the following beneficial effects: The two-way spinal channel type retractor with adjustable angle and depth can flexibly adjust the distance between the two moving seats through the sliding cooperation of the fixed guide rail and the moving seat, can form a stable "narrow space pulling structure in the minimally invasive channel when the distance is reduced to the diameter (3-5 cm) of the minimally invasive channel, and can replace the traditional minimally invasive channel; when the distance is expanded to the required range (8-15 cm) of open surgery, the clamping piece can realize large-range soft tissue pulling and adapt to the open surgery scene.

[0018] Further, by arranging the structure that the clamping piece can move in the vertical direction inside the clamping piece seat, the length of the clamping piece exposed outside the clamping piece seat can be adjusted according to the depth in the operation, the applicability is expanded, and the retractor with different depths need not be replaced in the operation. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the description of the embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description are only exemplary and, for those ordinarily skilled in the art, other drawings can be obtained without creative effort based on the provided drawings.

[0020] Figure 1 Structure diagram of the two-purpose spinal channel retractor with adjustable angle and depth; Figure 2 Structure diagram of the inside of the clamping piece base; Figure 3 Structure diagram of the moving base; Figure 4 Diagram of the assembly between the fixed guide rail and the extension guide rail; Figure 5 Structure diagram of Figure 1 Structure diagram of A shown in the figure.

[0021] The reference numerals in the figures represent the following respectively: 1-clamping piece base, 11-inner cavity, 12-rotating shaft, 13-bolt base, 14-counterbore hole, 15-adjusting bolt, 16-retaining ring, 17-convex strip, 18-concave sliding slot, 19-notch; 2-clamping piece, 21-threaded hole, 22-inner groove; 3-moving base, 31-rotating hole, 32-first threaded hole, 33-first locking bolt, 34-sliding slot, 35-second threaded hole, 36-second locking bolt; 4-fixed guide rail, 41-insertion slot, 42-first through hole, 43-connection threaded hole, 44-connection bolt; 5-extension guide rail, 51-plug, 52-second through hole; 6-bolt; 7-bracket assembly, 71-bracket, 72-link, 73-sliding seat, 74-right-angle clamp plate, 75-locking bolt. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those ordinarily skilled in the art without creative effort belong to the scope of protection of the present application.

[0023] As Figure 1As shown, the application provides an adjustable angle and depth dual-purpose spinal channel retractor, which mainly adjusts the distance between the two moving seats 3 through the sliding fit of the fixed guide rail 4 and the moving seat 3, so that the space formed between the two clamping pieces 2 can meet the use requirements of minimally invasive channels or retractors; and by setting the structure that the clamping piece 2 can move in the vertical direction inside the clamping piece seat 1, the length of the clamping piece 2 exposed outside the clamping piece seat 1 can be adjusted according to the depth during the operation, the applicability is expanded, and the replacement of retractors of different depths during the operation is avoided.

[0024] Among them, two clamping piece seats 1 are symmetrically arranged, and the clamping piece seat 1 is provided with a through inner cavity 11 in the vertical direction of the clamping piece seat 1; the clamping piece 2 can be inserted into the inner cavity 11.

[0025] Specifically, in order to form a minimally invasive channel, the clamping piece seat 1 is an arc-shaped column, and the clamping piece 2 is an arc-shaped structure matched with the clamping piece seat 1, so that a minimally invasive channel is formed between the two clamping piece seats 1 and the two clamping pieces 2.

[0026] And the clamping piece 2 can move in the vertical direction of the clamping piece seat 1 in the inner cavity 11, so that when used as a minimally invasive channel or a retractor, the length of the clamping piece 2 exposed outside the clamping piece seat 1 can be adjusted according to the actual operation situation, so as to adjust the depth of the minimally invasive channel and the pulling depth, avoid insufficient pulling caused by the clamping piece 2 being too short, and prevent interference with the operation caused by the clamping piece 2 being too long.

[0027] Further, the clamping piece 2 includes a plurality of clamping pieces 2 with different widths, and the clamping piece 2 is detachably connected with respect to the inner cavity 11, so that different specifications of clamping pieces 2 can be selected and installed in the clamping piece seat 1 as needed.

[0028] Each of the two clamping piece seats 1 is provided with a moving seat 3, the edge of the clamping piece seat 1 is provided with a rotating shaft 12 in the horizontal direction, the moving seat 3 is provided with a rotating hole 31, and the rotating shaft 12 and the rotating hole 31 are gap-fitted, so that the clamping piece seat 1 can rotate by 360° around the rotating shaft 12 to adjust the angle of the clamping piece 2 inserted into the affected area.

[0029] As shown, Figure 3 As shown, the moving seat 3 is provided with a first threaded hole 32 penetrating through the rotating hole 31 in the vertical direction of the rotating hole 31, and a first locking bolt 33 is threadedly connected in the first threaded hole 32.

[0030] When the clamping piece 2 is adjusted to the optimal angle, the first locking bolt 33 is tightened, the end of the bolt abuts against the surface of the rotating shaft 12, the position of the rotating shaft 12 is fixed by the static friction force generated by the pressure, and the angle error after locking is ≤1°, which is much better than the deviation range of 1.5°-3° of the prior art, effectively avoiding the risk of nerve and blood vessel damage caused by angle deviation during the operation.

[0031] The mobile seat 3 is provided with a sliding groove 34 penetrating through the mobile seat 3, and the two mobile seats 3 are respectively arranged at the two ends of the fixed guide rail 4 through the sliding groove 34 and are in sliding connection with the fixed guide rail 4, so as to adjust the distance between the two mobile seats 3.

[0032] When the distance is reduced to adapt to the diameter of the minimally invasive channel of 3-5 cm, the two clamping pieces 2 can form a stable "narrow space pulling structure" in the minimally invasive channel, replacing the traditional minimally invasive channel; when the distance is expanded to the required range of 8-15 cm for open surgery, the clamping piece 2 can realize large-range soft tissue pulling and adapt to the open surgery scene to play the role of a retractor.

[0033] The mobile seat 3 is provided with a second threaded hole 35 penetrating through the sliding groove 34 in the vertical direction of the sliding groove 34, the first locking bolt 36 is in threaded connection in the second threaded hole 35, and the fixed guide rail 4 is locked and fixed through the second bolt, so as to ensure that the distance is stable and unchanged during the operation, and to avoid that the distance is expanded or reduced due to the change of pulling force.

[0034] Specifically, when the minimally invasive surgery is converted to open surgery, the minimally invasive channel can be quickly switched to a retractor without removing the minimally invasive channel and without replacing the entire set of instruments, which greatly shortens the time and avoids secondary damage to related tissues.

[0035] For the structure that the clamping piece 2 moves in the clamping piece seat 1, the embodiment provides the following examples.

[0036] As shown in Figure 2 The inner cavity 11 is provided with a bolt seat 13, the bolt seat 13 is provided with a countersunk hole 14 penetrating through the bolt seat 13 in the vertical direction of the inner cavity 11, the adjusting bolt 15 is arranged in the countersunk hole 14, the threaded shank part of the adjusting bolt 15 is in rotational connection with the countersunk hole 14, and the head part of the adjusting bolt 15 is clamped in the countersunk end of the countersunk hole 14, the stop ring 16 is arranged in the countersunk end, so as to limit the head part in the countersunk hole 14, so that the bolt can only rotate in the countersunk hole 14 and cannot move along the axis direction of the countersunk hole 14.

[0037] The top of the clamping piece 2 is provided with a threaded hole 21 in the vertical direction, the adjusting bolt 15 can be in threaded connection with the threaded hole 21, and the clamping piece 2 is moved in the vertical direction of the clamping piece seat 1 by screwing the adjusting bolt 15.

[0038] The head part is designed as an internal hexagonal or a slot, and is adapted to a special miniature wrench for surgery, and the miniature wrench can be connected with the head part through the stop ring 16.

[0039] When the exposed length of the clamping piece 2 needs to be adjusted, the head slot of the adjusting bolt 15 is inserted with a surgical wrench, and the bolt is twisted clockwise or counterclockwise. Since the bolt is limited from moving axially by the stopper 16, the threaded portion of the bolt and the thread hole 21 of the clamping piece 2 cooperate to convert the “rotary motion” into the “vertical linear motion of the clamping piece 2”. When the bolt is twisted clockwise, the clamping piece 2 moves upward along the inner cavity 11, and the exposed length is shortened. When the bolt is twisted counterclockwise, the clamping piece 2 moves downward along the inner cavity 11, and the exposed length is increased.

[0040] Specifically, a protrusion 17 is arranged in the inner cavity 11 in the vertical direction, and an inner groove 22 matching the protrusion 17 is arranged on the surface of the clamping piece 2 in the corresponding position in the vertical direction. This allows the clamping piece 2 to be inserted into the inner cavity 11 from the bottom of the inner cavity 11 in the state that the clamping piece 2 is clamped with the protrusion 17 and the inner groove 22, and allows the adjusting bolt 15 and the threaded hole 21 to be located on the same straight line.

[0041] During the process of inserting the clamping piece 2 from below the clamping piece seat 1 into the clamping piece seat 1, the clamping of the inner groove 22 and the protrusion 17 will automatically complete the preliminary alignment. Since the position accuracy of the protrusion 17 and the adjusting bolt 15 has been pre-set, when the inner groove 22 slides along the protrusion 17, the threaded hole 21 at the top of the clamping piece 2 will naturally approach the threaded portion of the adjusting bolt 15, and finally the center lines of the two will be accurately aligned, facilitating the assembly of the adjusting bolt 15 and the threaded hole 21 of the clamping piece 2.

[0042] At the same time, the clamping of the inner groove 22 and the protrusion 17 will form a rigid constraint, forcing the clamping piece 2 to move only in the vertical direction of the protrusion 17, i.e. in the axial direction of the clamping piece seat 1, completely avoiding the possible skewed insertion or offset movement in the traditional non-guided structure.

[0043] In order to facilitate the conversion between the minimally invasive channel and the retractor, the present embodiment provides an extension guide rail 5 at both ends of the fixed guide rail 4, which is implemented as follows.

[0044] As shown in Figure 4 , the two ends of the fixed guide rail 4 are provided with detachable extension guide rails 5. The end of the fixed guide rail 4 is provided with a slot 41, and the end of the extension guide rail 5 is provided with a plug 51. By inserting the plug 51 into the slot 41, the fixed guide rail 4 and the extension guide rail 5 are connected into a whole.

[0045] The fixed guide rail 4 and the extension guide rail 5 are of the same specification, so that the moving seat 3 can smoothly slide along the fixed seat and the extension guide rail 5.

[0046] When the surgery is in the scene of minimally invasive channel, the extension rail 5 is not needed to be installed, the fixed rail 4 itself length 15-20cm can meet the 3-5cm minimally invasive spacing adjustment requirement, the short distance of the retractor requirement, the moving seat 3 slides at both ends of the fixed rail 4, and the narrow range positioning of the clamping piece 2 can be realized, at this time, the overall instrument volume is compact, and it is convenient to operate around the minimally invasive channel. When the surgery needs to be converted from the minimally invasive channel to the open surgery, such as processing complex osteophytes and expanding the surgical field, the extension rail 5 can be quickly installed to quickly realize the spacing expansion. Without replacing the whole retractor, the spacing adjustment range can be expanded from 3-5cm to 18-40cm only by plugging and unplugging the extension rail 5, which completely covers the pulling requirement of open surgery and avoids the complex process of removing the minimally invasive retractor and replacing the open retractor in the traditional technology.

[0047] Specifically, the first through hole 42 penetrating the through slot 41 is opened on the fixed rail 4, the second through hole 52 is opened at the plug 51, and when the plug 51 is inserted into the slot 41, the first through hole 42 and the second through hole 52 are through; wherein the through hole is divided into two parts by the slot 41, which are respectively set as smooth part and threaded part, and the threaded connection of the smooth part of the first through hole 42 and the second through hole 52 with the threaded part of the first through hole 42 is realized by the bolt.

[0048] Further, the fixed rail 4 is provided with an inner groove 22 at the first through hole 42 for accommodating the bolt head of the bolt, so as to avoid the bolt head exceeding the plane where the fixed rail 4 and the side wall of the extension rail 5 are located, and make the moving seat 3 smoothly slide at the connection between the two.

[0049] During the surgery, in order to fix the whole device, the present embodiment further provides the following examples.

[0050] The middle position of the fixed rail 4 is provided with a connecting threaded hole 43, which is connected with an external connecting piece through a connecting bolt 44.

[0051] During the surgery, if the minimally invasive channel or the retractor needs to be fixed, the connecting piece on the fixed rail 4 is connected with a general mechanical arm, and the mechanical arm is connected with the operating bed, so that the hand of the surgical assistant is not needed, the stability of the whole device is improved, a stable reference for surgical operation is provided, and the risk of intraoperative tissue damage is reduced.

[0052] In the prior art, a light source is often needed to be installed on the minimally invasive channel or the retractor during the surgery to facilitate the surgery, and therefore the present embodiment further provides the following examples.

[0053] For example, the light source is connected with the fixed rail 4 through a connecting piece, and the connecting piece is connected with the mechanical arm. Figure 1 And Figure 5As shown, the top of the clip seat 1 is provided with a concave sliding groove 18 at the notch of the inner cavity 11, and a support assembly 7 is detachably connected in the concave sliding groove 18, which is used to install surgical auxiliary tools such as cold light sources or endoscope lenses.

[0054] Specifically, the support assembly 7 includes a support 71, a connecting rod 72 and a sliding seat 73, which are integrally formed and are made of medical 316L stainless steel or titanium alloy material to meet the biological compatibility and corrosion resistance requirements.

[0055] The two ends of the connecting rod 72 are connected with the support 71 and the sliding seat 73 respectively, the support 71 is used to install surgical auxiliary tools, and the sliding seat 73 is a convex structure and can be clamped in the concave sliding groove 18 and can slide along the concave sliding groove 18 so that the entire support assembly 7 is located on the top of the clip seat 1 and can move along the clip seat 1.

[0056] Among them, a lateral dismounting passage is provided for the sliding seat 73, and a notch 19 is opened on the clip seat 1 and penetrates the concave sliding groove 18, so that the sliding seat 73 can be clamped into the concave sliding groove 18 laterally through the notch 19.

[0057] During operation, first, the convex part of the sliding seat 73 is aligned with the notch 19, and then it is pushed into the sliding groove 34 in the horizontal direction until it is completely inserted into the sliding groove 34, and then it is axially slid along the sliding groove 34 to the target position. The entire mounting and dismounting process does not need to disassemble the clip 2 or the clip seat 1, and the time consumption is ≤10 seconds, which meets the needs of emergency installation of auxiliary tools during surgery.

[0058] The support 71 is a ring-shaped support 71, and the cold light source or endoscope lens is arranged inside the support 71 and is locked and fixed by a bolt arranged on the support 71.

[0059] Further, a right-angle clamp plate 74 is arranged on one side of the sliding seat 73, so that there is a space between the right-angle support 71 and the sliding seat 73 for clamping the side wall of the clip seat 1, and a locking bolt 75 is threadedly connected on the right-angle clamp plate 74, and the locking bolt 75 is arranged so that when it is tightened, the end of the locking bolt 75 can abut against the side wall of the clip seat 1.

[0060] The convex sliding seat 73 and the concave sliding groove 34 are assembled, and the right-angle clamp plate 74 and the locking bolt 75 are doubly locked, so as to ensure the stability between the support assembly 7 and the clip seat 1.

[0061] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application, and the protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present application within the spirit and protection scope of the present application, and such modifications or equivalent replacements shall also be considered to fall within the protection scope of the present application.

Claims

1. A dual purpose spinal channel retractor which is adjustable in angle and depth, characterized in that, The utility model relates to a kind of adjustable microtrauma channel or retractor, including: Two symmetrical clamping piece seats (1) are provided, the clamping piece seat (1) is arc column, and the clamping piece seat (1) is opened along the vertical direction of itself through itself inner cavity (11); Clamping piece (2) can be inserted into the inner cavity (11), and the clamping piece (2) can be moved in the vertical direction of the clamping piece seat (1) in the inner cavity (11), to adjust the length of the clamping piece (2) exposed outside the clamping piece seat (1); Two clamping piece seats (1) are each provided with a moving seat (3), the edge of the clamping piece seat (1) is provided with a rotating shaft (12) along the horizontal direction, the moving seat (3) is opened with a rotating hole (31), the rotating shaft (12) and the rotating hole (31) are gap matched, to adjust the angle of the clamping piece (2) inserted into the affected area, the moving seat (3) is opened with a first threaded hole (32) along the direction perpendicular to the rotating hole (31) and penetrating the rotating hole (31), and the first threaded hole (32) is threadedly connected with a first locking bolt (33); Fixed guide rail (4) is opened with a sliding slot (34) through itself on the moving seat (3), two moving seats (3) are placed at both ends of the fixed guide rail (4) through the sliding slot (34) and are connected with the fixed guide rail (4) slidingly, to adjust the distance between the two moving seats (3), and the moving seat (3) is opened with a second threaded hole (35) along the direction perpendicular to the sliding slot (34) and penetrating the sliding slot (34), and the second threaded hole (35) is threadedly connected with a first locking bolt (36); By adjusting the distance between the two moving seats (3), the space formed between the two clamping pieces (2) can meet the use requirements of minimally invasive channel or retractor.

2. The dual purpose adjustable angle and depth spinal corridor retractor of claim 1, wherein, The inner cavity (11) is provided with a bolt seat (13), the bolt seat (13) is opened with a countersunk hole (14) through the bolt seat (13) along the vertical direction of the inner cavity (11), the countersunk hole (14) is provided with an adjusting bolt (15), the stud portion of the adjusting bolt (15) is connected with the countersunk hole (14) rotatably, and the head portion of the adjusting bolt (15) is clamped in the countersunk end of the countersunk hole (14), the countersunk end is provided with a check ring (16), to limit the head portion in the countersunk hole (14); The top of the clamping piece (2) is opened with a threaded hole (21) along the vertical direction, the adjusting bolt (15) can be threadedly connected with the threaded hole (21), by screwing the adjusting bolt (15), so that the clamping piece (2) moves along the vertical direction of the clamping piece seat (1).

3. The dual purpose adjustable angle and depth spinal corridor retractor of claim 1, wherein, A convex strip (17) is arranged in the inner cavity (11) in the vertical direction, and the surface of the clamping piece (2) is provided with an inner groove (22) matching the convex strip (17) in the corresponding position in the vertical direction, so that the clamping piece (2) can be inserted into the inner cavity (11) from the bottom of the inner cavity (11) in the state that the convex strip (17) and the inner groove (22) are engaged, and the adjusting bolt (15) and the threaded hole (21) are located on the same straight line.

4. The dual purpose adjustable angle and depth spinal corridor retractor of claim 1, wherein, The clamping piece (2) includes a plurality of clamping pieces (2) with different widths, and the clamping piece (2) is detachably connected with the inner cavity (11).

5. The dual purpose adjustable angle and depth spinal corridor retractor of claim 1, wherein, The fixed guide rail (4) is provided with a detachable extension guide rail (5) at both ends; the end of the fixed guide rail (4) is provided with a insertion slot (41), and the end of the extension guide rail (5) is provided with a plug (51), so as to connect the fixed guide rail (4) and the extension guide rail (5) into a whole by inserting the plug (51) into the insertion slot (41).

6. The dual purpose adjustable angle and depth spinal corridor retractor of claim 1, wherein, The fixed guide rail (4) is provided with a first through hole (42) penetrating the insertion slot (41), the plug (51) is provided with a second through hole (52), and when the plug (51) is inserted into the insertion slot (41), the first through hole (42) and the second through hole (52) are in communication; wherein the through hole is divided into two parts by the insertion slot (41), which are respectively smooth part and threaded part, and the smooth part of the first through hole (42) and the second through hole (52) are sequentially penetrated by the bolt and are threadedly connected with the threaded part of the first through hole (42).

7. The dual purpose adjustable angle and depth spinal corridor retractor of claim 6, wherein, The middle position of the fixed guide rail (4) is provided with a connecting threaded hole (43), which is connected with an external connecting member through a connecting bolt (44).

8. The dual purpose adjustable angle and depth spinal corridor retractor of claim 1, wherein, The top of the clamping piece seat (1) is provided with a concave sliding groove (18) at the slot opening of the inner cavity (11), and a support assembly (7) is detachably connected in the concave sliding groove (18), and the support assembly (7) is used for installing surgical auxiliary tools.

9. The dual purpose adjustable angle and depth adjustable channelled retractor of claim 1, wherein, The support assembly (7) includes a support (71), a connecting rod (72) and a sliding seat (73), the two ends of the connecting rod (72) are respectively connected with the support (71) and the sliding seat (73), the support (71) is used for installing surgical auxiliary tools, the sliding seat (73) is a convex structure, and the sliding seat (73) can be clamped in the concave sliding groove (18) and can slide along the concave sliding groove (18); Wherein, the clamping piece seat (1) is provided with a notch (19) penetrating the concave sliding groove (18), so that the sliding seat (73) can enter the concave sliding groove (18) through the notch (19).

10. The dual purpose adjustable angle and depth spinal corridor retractor of claim 1, wherein, The sliding seat (73) is provided with a right-angle clamp plate (74) on one side, so that there is a space between the right-angle support (71) and the sliding seat (73) for clamping the side wall of the clamping piece seat (1), and a locking bolt (75) is threadedly connected on the right-angle clamp plate (74), and the end of the locking bolt (75) can abut against the side wall of the clamping piece seat (1) by tightening the locking bolt (75).

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