Minimally invasive transforaminal lumbar interbody fusion dedicated channel expander
By designing a multi-directional adjustment channel opener, the problems of unstable fixation and difficulty in adjusting surgical channels in the prior art are solved, and the rapid establishment of stable channels is achieved, and the flexibility and safety of surgery are improved.
Patent Information
- Application Number
- CN202110337349.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-03-30
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2041-03-30
AI Technical Summary
In the current minimally invasive transforamen lumbar intervertebral fusion surgery, the fixing method of the working channel is cumbersome and unstable, which can easily cause iatrogenic damage to the patient, and it is difficult to adjust the channel angle and depth, affecting the surgical effect.
A channel opener including mounting rods, pedicle nail sleeve fixing assembly, length rods, angle adjustment bolts and depth adjustment rods is designed to achieve multi-directional adjustment of surgical channels, ensuring stable and flexible channels. set up.
It realizes the rapid establishment of stable surgical channels, simplifies the operation process, improves the stability and flexibility of surgical channels, and reduces the risk to patients.
Smart Images
Figure CN112914633B_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the field of medical technology, and in particular relates to a channel expander specifically for minimally invasive transforaminal lumbar interbody fusion. Background Art
[0002] MIS-TILF surgery (Minimally Invasive Transforaminal Lumbar Interbody Fusion) is a minimally invasive transforaminal lumbar interbody fusion surgery. This surgery is mainly used to treat diseases such as lumbar spinal stenosis, lumbar disc herniation, lumbar instability, and lumbar degeneration. At present, the fixation of the working channel is mainly solved by fixing the stent on the operating table or holding it by an assistant. The stent is fixed on the operating table to fix the working channel. Due to the large size of the stent of the working channel, it brings great difficulties to placement and aseptic operation, and the operation process is relatively cumbersome, requiring multiple joints to lock in order to stabilize the channel. The fixed stent is heavy, and if it is not placed carefully, it may cause iatrogenic damage to the patient. After the stent is fixed, it is difficult to adjust the working channel, and it is difficult to adjust the channel working angle according to the needs of the operation. It is difficult to ensure the stability of the fixed channel by holding it by an assistant, which is easy to cause the working channel to shift during the operation, and it also wastes manpower. Summary of the invention
[0003] In order to solve the deficiencies in the prior art, the present invention provides a channel expander for minimally invasive transforaminal lumbar interbody fusion surgery, which is convenient for adjusting the working channel.
[0004] To solve the above technical problems, the present invention adopts the following technical solutions: a channel expander for minimally invasive transforaminal lumbar interbody fusion surgery, comprising a mounting rod, on which two sets of pedicle screw sleeve fixing assemblies are mounted;
[0005] A horizontal mounting sleeve is fixed to the upper end of the mounting rod, and a length rod is inserted in the mounting sleeve. The length rod is horizontally arranged to the right, and a first pressing bolt is threadedly connected to the mounting sleeve. The inner end of the first pressing bolt is pressed into engagement with the length rod. A mounting seat is arranged below the length rod, and an expansion degree adjustment mechanism is arranged between the mounting seat and the length rod. The expansion degree adjustment mechanism is used to adjust the distance between the mounting seat and the length rod. Channel expansion parts are arranged on the right side of the mounting seat and the right end of the length rod, and the two sets of channel expansion parts are arranged in a mirror-image manner.
[0006] The pedicle screw sleeve fixing assembly includes a movable sleeve, which is sleeved on the mounting rod and can slide up and down along the mounting rod. The movable sleeve is threadedly connected with a second pressing bolt, the inner end of the second pressing bolt is pressed into cooperation with the mounting rod, and the movable sleeve is hinged with a fixing sleeve through a ball hinge.
[0007] The expansion degree adjustment mechanism includes a guide rack, which is arranged in the vertical direction, and the upper end of the guide rack is fixed to the bottom surface of the length rod. A vertical channel is provided on the mounting seat, and the guide rack is penetrated in the vertical channel of the mounting seat. The mounting seat can move up and down along the guide rack. A first through hole and a second through hole are provided on the left side of the mounting seat. A mounting side plate is fixed on the left side of the mounting seat, and the mounting side plate is provided with a gear and a braking claw. A short shaft is fixed at the center of the gear, and the short shaft is rotatably installed on the mounting side plate. The right part of the gear passes through the first through hole and meshes with the guide rack. A handle is fixed to the end of the short shaft, and the braking claw is hinged to the mounting side plate through a pin shaft. A torsion spring is installed on the pin shaft. The torsion spring acts on the braking claw. Under the action of the torsion spring, the end of the braking claw passes through the second through hole and presses on the teeth of the guide rack.
[0008] The channel expansion member at the right end of the length rod includes an expansion arm, the left end of the expansion arm is installed on the right end of the length rod, the end of the expansion arm is detachably installed with an expansion semicircular tube, the expansion semicircular tube is arranged along the front and rear directions, and a light source through hole is opened on the front end surface of the expansion semicircular tube.
[0009] The left end of the spreading arm is rotatably installed on the right end of the length rod through a rotating shaft, a front side plate is fixed to the upper part of the left end of the spreading arm, and a rear side plate is fixed to the upper part of the right end of the length rod. The front side plate is located directly in front of the rear side plate, and an angle adjustment bolt is threaded on the front side plate, and the end of the angle adjustment bolt is in pressure contact with the rear side plate.
[0010] A connecting block is arranged on the left side of the front end portion of the expanded semicircular tube, the left side portion of the connecting block is a plate-like structure, the left side portion of the connecting block and the right end portion of the expanded arm form a stop structure, the right end portion of the expanded arm is threadedly connected with a fixing bolt, a slot is arranged on the left side portion of the connecting block, the left side portion of the connecting block and the right end portion of the expanded arm are fixedly connected by a fixing bolt, and the fixing bolt passes through the slot.
[0011] A depth adjustment rod is fixed to the left side of the front end portion of the open semicircular tube, and the rear end of the depth adjustment rod is fixedly connected to the left side of the front end of the open semicircular tube. A guide groove is provided on the right side of the connecting block. The depth adjustment rod is arranged in the guide groove and can slide in the front and rear directions. A limit piece is installed on the connecting block, and the limit piece is used to limit the depth adjustment rod from sliding in the guide groove.
[0012] The cross section of the guide chute is T-shaped, the left part of the depth adjustment rod is matched with the guide chute, the left part of the depth adjustment rod is slidably installed in the guide chute, and a row of ratchet teeth is arranged on the left side of the depth adjustment rod;
[0013] A through slot with an open right side is provided in the connecting block, and the limiting member includes a check column and a compression spring arranged in the through slot. The right end portion of the check column is a wedge-shaped structure. Under the action of the compression spring, the right end of the check column presses against the left ratchet of the depth adjustment rod. A long hole is provided on the front surface of the connecting block, and an operating column is passed through the long hole. The operating column passes through the through slot and is fixedly connected to the check column, and a cap is fixed on the end of the operating column.
[0014] The depth adjustment rod is composed of several rod parts, a threaded hole is opened at the end of the rod part, a stud is fixed at the other end of the rod part, all the rod parts are connected in sequence, and the end stud of the rod part is threadedly connected to the end threaded hole of another rod part.
[0015] By adopting the above technical scheme, the present invention has the following beneficial effects: the present invention completes the multi-directional adjustment of the two groups of open semicircular tubes through components such as the length rod, the angle adjustment bolt and the depth adjustment rod, and finally completes the establishment of a suitable surgical channel; the present invention has a simple structure, is easy to use, does not affect the surgical operation, and can quickly establish a stable surgical channel. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the structure of the present invention;
[0017] Figure 2 It is the installation diagram of the mounting base;
[0018] Figure 3 It is a schematic diagram of the connection between the open semicircular tube and the connecting block;
[0019] Figure 4 yes Figure 3 Sectional view at AA;
[0020] Figure 5 It is the installation diagram of the limiter;
[0021] Figure 6 It is a structural schematic diagram of the rod body. DETAILED DESCRIPTION
[0022] like Figure 1-6 As shown, the dedicated channel expander for minimally invasive transforaminal lumbar interbody fusion of the present invention comprises a mounting rod 1, on which two sets of pedicle screw sleeve fixing assemblies are mounted;
[0023] A transverse mounting sleeve 2 is fixed to the upper end of the mounting rod 1, and a length rod 3 is inserted in the mounting sleeve 2. The length rod 3 is horizontally arranged to the right. A first pressing bolt 4 is threadedly connected to the mounting sleeve 2, and the inner end of the first pressing bolt 4 is pressed and matched with the length rod 3. The length rod 3 can slide in the mounting sleeve 2 along the left and right directions to adjust the length of the overall device and is fixed by the first pressing bolt 4. A mounting seat 5 is arranged below the length rod 3, and an expansion adjustment mechanism is arranged between the mounting seat 5 and the length rod 3. The expansion adjustment mechanism is used to adjust the distance between the mounting seat 5 and the length rod 3. Channel expansion parts are arranged on the right side of the mounting seat 5 and the right end of the length rod 3, and the two sets of channel expansion parts are arranged in a mirror image.
[0024] The pedicle screw sleeve fixing assembly includes a movable sleeve 6, which is sleeved on the mounting rod 1 and can slide up and down along the mounting rod 1. A second pressing bolt 7 is threadedly connected to the movable sleeve 6. The inner end of the second pressing bolt 7 is pressed and matched with the mounting rod 1. A fixing sleeve 9 is hinged on the movable sleeve 6 through a ball hinge 8; the two fixing sleeves 9 are respectively used to fix two surgical instrument pedicle screw sleeves, and the pedicle screw sleeves can slide up and down along the mounting rod 1 and are fixed by the second pressing bolt 7.
[0025] The present invention is further improved, the opening adjustment mechanism includes a guide rack 10, the guide rack 10 is arranged in the vertical direction, and the upper end of the guide rack 10 is fixed to the bottom surface of the length rod 3, the mounting seat 5 is provided with a vertical channel, the guide rack 10 is passed through the vertical channel of the mounting seat 5, the mounting seat 5 can move up and down along the guide rack 10, the left side of the mounting seat 5 is provided with a first through hole 11 and a second through hole 12, the left side of the mounting seat 5 is fixed with a mounting side plate 13, the mounting side plate 13 is provided with a gear 14 and a brake claw 16, a short shaft 15 is fixed at the center of the gear 14, and the short shaft 15 is rotatably mounted on the mounting side plate 13. The right part of the gear 14 passes through the first through hole 11 and meshes with the guide rack 10. A handle 17 is fixed to the end of the short shaft 15. The braking claw 16 is hinged to the mounting side plate 13 through a pin 18. A torsion spring 19 is installed on the pin 18. The torsion spring 19 acts on the braking claw 16. Under the action of the torsion spring 19, the end of the braking claw 16 passes through the second through hole 12 and presses on the teeth of the guide rack 10. When in use, the handle 17 is rotated to drive the gear 14 to rotate, thereby driving the mounting seat 5 to move along the guide rack 10, so as to achieve the purpose of accurately adjusting the intervertebral opening angle. At the same time, the braking claw 16 limits the movement of the mounting seat 5 along the guide rack 10 under the action of the torsion spring 19. During specific operation, the braking claw 16 is pressed downward to release the pressing effect of the end of the braking claw 16 on the teeth of the guide rack 10, and then the mounting seat 5 can be quickly operated to move on the guide rack 10;
[0026] The channel expansion member at the right end of the length rod 3 includes an expansion arm 20, the left end of the expansion arm 20 is installed on the right end of the length rod 3, and the end of the expansion arm 20 is detachably installed with an expansion semicircular tube 21, which is arranged along the front-to-back direction. A light source through hole 22 is provided on the front end face of the expansion semicircular tube 21. The light source through hole 22 is used to add a light source to illuminate the interior of the expansion semicircular tube 21.
[0027] The present invention is further improved, the left end of the spreading arm 20 is rotatably mounted on the right end of the length rod 3 through the rotating shaft 23, the front side plate 24 is fixed to the upper part of the left end of the spreading arm 20, and the rear side plate is fixed to the upper part of the right end of the length rod 3, the front side plate 24 is located just in front of the rear side plate (because the rear side plate is blocked by the front side plate 24, it is not shown in the figure), and the front side plate 24 is threadedly connected with an angle adjustment bolt 25, and the end of the angle adjustment bolt 25 is in pressure contact with the rear side plate; when in use, by rotating the angle adjustment bolt 25, since the end of the angle adjustment bolt 25 is in pressure contact with the rear side plate, the angle adjustment bolt 25 moves along the length direction after rotation, and the rear side plate plays a limiting role, so that the angle adjustment bolt 25 and the front side plate 24 move together, driving the spreading arm 20 to rotate around the rotating shaft 23 by a certain angle, and then driving the right side spreading semicircular tube 21 to rotate by a certain angle, so as to achieve the purpose of adjusting the spreading angle of the spreading semicircular tube 21.
[0028] The present invention is further improved, a connecting block 26 is provided on the left side of the front end portion of the expanded semicircular tube 21, the left side portion of the connecting block 26 is a plate-like structure, the left side portion of the connecting block 26 and the right end portion of the expanded arm 20 form a stop structure 27, the right end portion of the expanded arm 20 is threadedly connected with a fixing bolt 28, a slot is provided on the left side portion of the connecting block 26, the left side portion of the connecting block 26 and the right end portion of the expanded arm 20 are fixedly connected by the fixing bolt 28, and the fixing bolt 28 passes through the slot 29. The above is a manner in which the expanded semicircular tube 21 is detachably installed on the right end portion of the expanded arm 20 through the connecting block 26, and this detachable manner can quickly disassemble and organize the expanded semicircular tube 21.
[0029] The present invention is further improved, a depth adjustment rod 30 is fixed to the left side of the front end of the expanded semicircular tube 21, the rear end of the depth adjustment rod 30 is fixedly connected to the left side of the front end of the expanded semicircular tube 21, a guide slot is provided on the right side of the connecting block 26, the depth adjustment rod 30 is arranged in the guide slot and can slide in the front-back direction, and a limiter is installed on the connecting block 26, the limiter is used to limit the depth adjustment rod 30 from sliding in the guide slot. According to the surgical situation, the insertion depth of the expanded semicircular tube 21 can be changed by adjusting the position of the depth adjustment rod 30 in the guide slot;
[0030] The present invention is further improved, the cross section of the guide slot is T-shaped, the left part of the depth adjustment rod 30 is adapted to the guide slot, the left part of the depth adjustment rod 30 is slidably installed in the guide slot, and a row of ratchet teeth 31 is provided on the left side of the depth adjustment rod 30;
[0031] A through slot 32 with an open right side is provided in the connecting block 26, and the limiting member includes a check column 33 and a compression spring 34 arranged in the through slot 32. The right end of the check column 33 is a wedge-shaped structure. Under the action of the compression spring 34, the right end of the check column 33 presses on the left ratchet 31 of the depth adjustment rod 30. A long hole 35 is provided on the front surface of the connecting block 26, and an operating column 36 is passed through the long hole 35. The operating column 36 penetrates into the through slot 32 and is fixedly connected to the check column 33, and a cap 37 is fixed to the end of the operating column 36. When in use, the operator can push the depth adjustment rod 30 backward, at which time the check column 33 will not limit the depth adjustment rod 30 from being pushed backward. When the pushing stops, the right end of the check column 33 presses on the left ratchet 31 of the depth adjustment rod 30 under the action of the compression spring 34 to position the depth adjustment rod 30. When the depth adjustment rod 30 needs to be pulled forward, the cap 37 is pushed leftward, and the cap 37 drives the check column 33 to move leftward through the operating column 36, thereby releasing the restriction of the check column 33 on the depth adjustment rod 30, and the depth adjustment rod 30 can be lifted forward.
[0032] The present invention is further improved, the depth adjustment rod 30 is composed of a plurality of rod parts 38, a threaded hole 39 is opened at the end of the rod part 38, a stud 40 is fixed to the other end of the rod part 38, all the rod parts 38 are connected in sequence, and the end stud 40 of the rod part 38 is threadedly connected in the end threaded hole 39 of another rod part 38; the depth adjustment rod 30 is composed of a split type, when the semicircular tube 21 is adjusted to open, the excessively long depth adjustment rod 30 affects the surgical operation, at this time, the excess rod part 38 can be unscrewed to shorten the overall length of the depth adjustment rod 30, so as to facilitate the surgical operation.
[0033] This embodiment does not impose any formal limitation on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.
Claims
1. A channel expander for minimally invasive transforaminal lumbar interbody fusion, characterized by: It includes a mounting rod, on which two sets of pedicle screw sleeve fixing components are mounted; A transverse mounting sleeve is fixed to the upper end of the mounting rod, a length rod is inserted in the mounting sleeve, the length rod is horizontally arranged to the right, a first pressing bolt is threadedly connected to the mounting sleeve, the inner end of the first pressing bolt is pressed and matched with the length rod, a mounting seat is arranged below the length rod, a spreading degree adjustment mechanism is arranged between the mounting seat and the length rod, the spreading degree adjustment mechanism is used to adjust the distance between the mounting seat and the length rod, channel spreading pieces are arranged on the right side of the mounting seat and the right end of the length rod, and the two sets of channel spreading pieces are arranged in a mirror image; The pedicle screw sleeve fixing assembly includes a movable sleeve, which is sleeved on the mounting rod and can slide up and down along the mounting rod. The movable sleeve is threadedly connected with a second pressing bolt, the inner end of the second pressing bolt is pressed with the mounting rod, and the movable sleeve is hinged with a fixing sleeve through a ball hinge. The expansion degree adjustment mechanism includes a guide rack, which is arranged in the vertical direction, and the upper end of the guide rack is fixed to the bottom surface of the length rod. A vertical channel is provided on the mounting seat, and the guide rack is penetrated in the vertical channel of the mounting seat. The mounting seat can move up and down along the guide rack. A first through hole and a second through hole are provided on the left side of the mounting seat. A mounting side plate is fixed on the left side of the mounting seat, and a gear and a brake claw are provided on the mounting side plate. A short shaft is fixed at the center of the gear, and the short shaft is rotatably mounted on the mounting side plate. The right part of the gear passes through the first through hole and meshes with the guide rack. A handle is fixed at the end of the short shaft. The brake claw is hinged to the mounting side plate through a pin shaft. A torsion spring is installed on the pin shaft. The torsion spring acts on the brake claw. Under the action of the torsion spring, the end of the brake claw passes through the second through hole and presses on the teeth of the guide rack; The channel expansion member at the right end of the length rod comprises an expansion arm, the left end of the expansion arm is installed at the right end of the length rod, the end of the expansion arm is detachably installed with an expansion semicircular tube, the expansion semicircular tube is arranged along the front-back direction, and a light source through hole is opened on the front end surface of the expansion semicircular tube; The left end of the spreading arm is rotatably mounted on the right end of the length rod through a rotating shaft, a front side plate is fixed to the upper part of the left end of the spreading arm, a rear side plate is fixed to the upper part of the right end of the length rod, the front side plate is located directly in front of the rear side plate, an angle adjustment bolt is threadedly connected to the front side plate, and the end of the angle adjustment bolt is in pressure contact with the rear side plate; A connecting block is arranged on the left side of the front end of the expanded semicircular tube, the left side of the connecting block is a plate-shaped structure, the left side of the connecting block and the right end of the expanded arm form a stop structure, the right end of the expanded arm is threadedly connected with a fixing bolt, a clamping groove is arranged on the left side of the connecting block, the left side of the connecting block and the right end of the expanded arm are fixedly connected by a fixing bolt, and the fixing bolt passes through the clamping groove; A depth adjustment rod is fixed to the left side of the front end portion of the open semicircular tube, and the rear end of the depth adjustment rod is fixedly connected to the left side of the front end of the open semicircular tube. A guide groove is provided on the right side of the connecting block. The depth adjustment rod is arranged in the guide groove and can slide in the front and rear directions. A limit piece is installed on the connecting block, and the limit piece is used to limit the depth adjustment rod from sliding in the guide groove.
2. The channel expander for minimally invasive transforaminal lumbar interbody fusion according to claim 1, characterized in that: The cross section of the guide chute is T-shaped, the left part of the depth adjustment rod is matched with the guide chute, the left part of the depth adjustment rod is slidably installed in the guide chute, and a row of ratchet teeth is arranged on the left side of the depth adjustment rod; A through slot with an open right side is provided in the connecting block, and the limiting member includes a check column and a compression spring arranged in the through slot. The right end portion of the check column is a wedge-shaped structure. Under the action of the compression spring, the right end of the check column presses against the left ratchet of the depth adjustment rod. A long hole is provided on the front surface of the connecting block, and an operating column is passed through the long hole. The operating column passes through the through slot and is fixedly connected to the check column, and a cap is fixed on the end of the operating column.
3. The channel expander for minimally invasive transforaminal lumbar interbody fusion according to claim 2, characterized in that: The depth adjustment rod is composed of several rod parts, a threaded hole is opened at the end of the rod part, a stud is fixed at the other end of the rod part, all the rod parts are connected in sequence, and the end stud of the rod part is threadedly connected to the end threaded hole of another rod part.