Percutaneous minimally invasive lumbar pedicle screw fixing system and matched instrument

Abstract

The invention discloses a percutaneous minimally invasive lumbar pedicle screw fixing system and a matched instrument. The percutaneous minimally invasive lumbar pedicle screw fixing system comprises a shell; the telescopic rod is fixedly connected with one side of the shell; the end, away from the shell, of the telescopic rod is fixedly connected with the handle. The opening mechanism is located in the shell; the strip-shaped plate is located outside the shell and connected with the opening mechanism; the detection positioning devices are located on the two sides of the strip-shaped plate; the distraction mechanism comprises a first groove, a motor push rod, a trapezoidal sliding block, a special-shaped sliding block, a second groove and a first motor, the distraction mechanism distraction a gap of a bone needing to be treated, the operation space of a medical worker in an operation is increased, the medical worker can better observe and treat diseased tissue, and the medical worker is more convenient to use. Wherein the distraction mechanism can flexibly adjust the distraction angle and distance, the stability of a vertebral body is maintained, the subsequent operation of an operation is facilitated, a detection lamp can display the condition of the operation in real time, medical workers are helped to rapidly position, operate and correct, and the operation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of medicine, and specifically to a percutaneous minimally invasive lumbar pedicle screw fixation system and supporting instruments. Background Art

[0002] A percutaneous minimally invasive lumbar pedicle screw fixation system and supporting instruments are used in percutaneous pedicle screw internal fixation surgery. Under image guidance, the pedicle screw-rod system is implanted through holes drilled in the skin. The surgery includes pedicle screw implantation, connecting rod implantation, pedicle nut implantation, and necessary pedicle distraction or compression techniques during the operation, belonging to minimally invasive percutaneous pedicle screw-rod system internal fixation surgery.

[0003] During the operation, medical staff need to perform the surgery of implanting the pedicle screw-rod system through holes in the patient's skin. Among them, the pedicle distraction mechanism can play a supporting role, help maintain vertebral body stability, increase the surgical operation space for medical staff, enable medical staff to observe better, reduce damage to surrounding tissues during the operation, and reduce the surgical risk. For this reason, we propose a percutaneous minimally invasive lumbar pedicle screw fixation system and supporting instruments. Summary of the Invention

[0004] The purpose of the present invention is to provide a percutaneous minimally invasive lumbar pedicle screw fixation system and supporting instruments to solve the problems mentioned in the above background art, that is, it is necessary to maintain vertebral body stability and reduce damage to surrounding tissues during the operation, and reduce the surgical risk.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A percutaneous minimally invasive lumbar pedicle screw fixation system and supporting instruments, comprising: a housing; a telescopic rod, the telescopic rod is fixedly connected to one side of the housing; a handle, one end of the telescopic rod away from the housing is fixedly connected with a handle; a distraction mechanism, located inside the housing; a strip-shaped plate, located outside the housing and connected to the distraction mechanism; a detection and positioning device, located on both sides of the strip-shaped plate; the distraction mechanism includes a first groove, a motor push rod, a trapezoidal slider, a special-shaped slider, a second groove, and a first motor. The outer side wall of the housing is provided with a first groove, the first groove is internally fixedly connected with a motor push rod, the front end of the motor push rod is fixedly connected with a trapezoidal slider, the housing is provided with second grooves on both sides, the opposite sides of the second grooves are slidably connected with special-shaped sliders, the special-shaped sliders penetrate through the second grooves and are slidably connected with the trapezoidal slider, and the outer side walls of the special-shaped sliders are fixedly connected with first motors, and the output shafts of the first motors are fixedly connected with the strip-shaped plate.

[0006] Preferably, the detection and positioning device includes a fourth groove, a second motor, a screw, a screw slider, a third motor and a detection light. The fourth groove is opened on both sides of the strip plate, the second motor is fixedly connected to the inside of the fourth groove, the output shaft of the second motor is fixedly connected to the screw, the end of the screw away from the second motor is rotatably connected to the inner wall of the fourth groove, the outer wall of the screw is threadedly connected to the screw slider, the outer wall of the screw slider is fixedly connected to the third motor, and the output shaft of the third motor is fixedly connected to the detection light.

[0007] Preferably, one side of the trapezoidal sliding block is fixedly connected to a measuring instrument, and scale lines are engraved on the side wall of the measuring instrument.

[0008] Preferably, the outer side wall of the shell is fixedly connected to the airbag, and the measuring instrument passes through the airbag and is slidably connected to the airbag block.

[0009] Preferably, a third groove is formed on the opposite side of the special-shaped slider, and the two sides of the trapezoidal slider are fixedly connected to the square blocks, and the special-shaped slider is slidably connected to the trapezoidal slider.

[0010] Preferably, a protective cover is fixedly connected to the upper surface of the handle to increase friction and ensure stability during use.

[0011] Preferably, a sliding rod is fixedly connected to one side of the inner part of the fourth groove, and the sliding rod is arranged parallel to the screw rod, and a side surface of the screw rod slider is provided with a sliding connection with the sliding rod.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. During the operation, the tool is placed into the bone, and the trapezoidal slider is pushed by the motor push rod to drive the special-shaped slider to slide. The expansion mechanism expands the gap of the bone that needs to be treated, which increases the operating space for medical staff. With the expanded bone gap, medical staff can better observe and treat the diseased tissue. The pedicle expansion mechanism can flexibly adjust the expansion angle and spacing, and maintain the stability of the vertebral body to facilitate the subsequent pedicle screw implantation.

[0014] 2. During the operation, the detection light enters the human body along with the tools, so that medical staff can clearly see the specific conditions of the surgical site, reduce injuries during the operation, and improve the success rate and safety of the operation. The detection light can also reduce uncertainty and repeated inspections during the operation, and reduce radiation to the patient's body. The detection light can display the progress of the operation in real time, helping medical staff to quickly locate, operate and correct, thereby improving the efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the opening mechanism of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the detection and positioning device of the present invention;

[0018] Figure 4 It is a schematic diagram of the explosion structure of the trapezoidal slider of the present invention.

[0019] In the figure: 1. shell; 2. telescopic rod; 3. handle; 4. opening mechanism; 401. first groove; 402. motor push rod; 403. trapezoidal slider; 404. special-shaped slider; 405. second groove; 406. first motor; 407. third groove; 408. square block; 409. airbag; 410. measuring instrument; 411. airbag block; 5. strip plate; 6. detection and positioning device; 601. fourth groove; 602. second motor; 603. screw rod; 604. screw rod slider; 605. third motor; 606. detection light; 607. slide rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 2, the present invention provides a percutaneous minimally invasive lumbar pedicle screw fixation system and supporting instruments: a housing 1; a telescopic rod 2, the telescopic rod 2 is fixedly connected to one side of the housing 1; a handle 3, one end of the telescopic rod 2 away from the housing 1 is fixedly connected to the handle 3; a spreading mechanism 4, located inside the housing 1; a strip plate 5, located outside the housing 1 and connected to the spreading mechanism 4; a detection and positioning device 6, located on both sides of the strip plate 5; the spreading mechanism 4 includes a first groove 401, a motor push rod 402, a trapezoidal slider 403, a special-shaped slider 404, a second groove 405 and a first motor 406; a first groove 401 is opened on the outer side wall of the housing 1, a motor push rod 402 is fixedly connected inside the first groove 401, the front end of the motor push rod 402 is fixedly connected to the trapezoidal slider 403, wherein the motor push rod 402 pushes the trapezoidal slider 403 to slide the special-shaped slider 404 to both sides, second grooves 405 are opened on both sides of the housing 1, the opposite sides of the second grooves 405 are slidably connected to the special-shaped slider 404, the special-shaped slider 404 penetrates through the second groove 405 and is slidably connected to the trapezoidal slider 403, first motors 406 are fixedly connected to the outer side walls of the special-shaped sliders 404, the output shafts of the first motors 406 are fixedly connected to the strip plate 5, wherein the sliding of the special-shaped slider 404 drives the strip plate 5 to spread, support the vertebral body and its stability, and the first motor 406 can make the strip plate 5 rotate, flexibly adjust the spreading angle of the strip plate 5, and facilitate the subsequent implantation of pedicle screws in the operation, etc.

[0022] Please refer to Figures 1-4 , a protective sleeve is fixedly connected to the upper surface of the handle 3 to increase friction and protect the stability of use; a measuring instrument 410 is fixedly connected to one side of the trapezoidal slider 403, and scale lines are engraved on the side wall of the measuring instrument 410 to facilitate medical staff to perform the operation more precisely; an airbag 409 is fixedly connected to the outer side wall of the housing 1, the measuring instrument 410 penetrates through the airbag 409 and is slidably connected to the airbag block 411, wherein the airbag 409 buffers the too fast speed of the motor push rod 402, a third groove 407 is opened on the opposite side of the special-shaped slider 404, square blocks 408 are fixedly connected to both sides of the trapezoidal slider 403, and the special-shaped slider 404 is slidably connected to the trapezoidal slider 403; a slide bar 607 is fixedly connected to one side inside the fourth groove 601, and the slide bar 607 is arranged parallel to the lead screw 603, and the side of the lead screw slider 604 is slidably connected to the slide bar 607.

[0023] Please refer to Figure 3, the detection and positioning device 6 includes a fourth groove 601, a second motor 602, a lead screw 603, a lead screw slider 604, a third motor 605 and a detection lamp 606. The fourth grooves 601 are provided on both sides of the strip-shaped plate 5. The second motor 602 is fixedly connected inside the fourth groove 601. The output shaft of the second motor 602 is fixedly connected to the lead screw 603. One end of the lead screw 603 away from the second motor 602 is rotatably connected to the inner wall of the fourth groove 601. The outer wall of the lead screw 603 is threadedly connected with the lead screw slider 604. Among them, the second motor 602 rotates the lead screw 603, so that the detection lamp 606 on the lead screw slider 604 can move and explore in the human body, increasing the accuracy of surgical operations and the clarity of the internal environment of the human body; the outer wall of the lead screw slider 604 is fixedly connected with the third motor 605, and the output shaft of the third motor 605 is fixedly connected to the detection lamp 606. Among them, the third motor 605 rotates the detection lamp 606, increasing the clarity around the injured vertebral body and reducing the damage during the operation. The flexible use of the detection lamp 606 can display the progress of the operation in real time, helping medical staff to quickly locate, operate and correct, and improving the surgical efficiency.

[0024] Working principle: During the operation, after the soft tissues on both sides are spread apart to expose the transverse processes, the user first holds the handle 3 and adjusts the telescopic rod 2 to place the unopened tool at the vertebral body to be treated. After reaching the destination, the trapezoidal slider 403 is pushed by the motor push rod 402. Among them, in order to prevent the motor push rod 402 from moving too fast, the airbag 409 is used for buffering. The pushing of the trapezoidal slider 403 causes the special-shaped slider 404 to slide to both sides, driving the strip-shaped plate 5 to spread the vertebral body. The distance between the vertebral bodies is appropriately adjusted and fixed according to the measuring instrument 410; the strip-shaped plate 5 is provided with a detection and positioning device 6. By rotating the lead screw 603 by the second motor 602, the detection lamp 606 on the lead screw slider 604 can move in the fourth groove 601, and the third motor 605 rotates the detection lamp 606, prompting the detection lamp 606 to move and rotate in the human body for exploration, increasing the accuracy of surgical operations and the clarity of the internal environment of the human body, and providing positioning for subsequent pedicle screw implantation and the like.

[0025] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A percutaneous minimally invasive lumbar pedicle screw fixation system and supporting equipment, characterized in that: include: Housing (1); A telescopic rod (2), the telescopic rod (2) being fixedly connected to one side of the housing (1); A handle (3), the end of the telescopic rod (2) away from the housing (1) being fixedly connected to the handle (3); The expansion mechanism (4) is located inside the housing (1); A strip plate (5) is located outside the housing (1) and is connected to the opening mechanism (4); Detection and positioning devices (6), located on both sides of the strip plate (5); The spreading mechanism (4) comprises a first groove (401), a motor push rod (402), a trapezoidal slider (403), a special-shaped slider (404), a second groove (405) and a first motor (406); the outer wall of the housing (1) is provided with a first groove (401); the motor push rod (402) is fixedly connected inside the first groove (401); the front end of the motor push rod (402) is fixedly connected to the trapezoidal slider (403); second grooves (405) are provided on both sides of the housing (1); the second groove (405) is slidably connected to the special-shaped slider (404) on the opposite side; the special-shaped slider (404) passes through the second groove (405) and is slidably connected to the trapezoidal slider (403); the outer wall of the special-shaped slider (404) is fixedly connected to the first motor (406); and the output shaft of the first motor (406) is fixedly connected to the strip plate (5).

2. A percutaneous minimally invasive lumbar pedicle screw fixation system and ancillary equipment according to claim 1, characterized in that: The detection and positioning device (6) comprises a fourth groove (601), a second motor (602), a screw (603), a screw slider (604), a third motor (605) and a detection light (606). The fourth groove (601) is opened on both sides of the strip plate (5). The second motor (602) is fixedly connected inside the fourth groove (601). The output shaft of the second motor (602) is fixedly connected to the screw (603). One end of the screw (603) away from the second motor (602) is rotatably connected to the inner wall of the fourth groove (601). The outer wall of the screw (603) is threadedly connected to the screw slider (604). The outer wall of the screw slider (604) is fixedly connected to the third motor (605). The output shaft of the third motor (605) is fixedly connected to the detection light (606).

3. A percutaneous minimally invasive lumbar pedicle screw fixation system and ancillary equipment according to claim 1, characterized in that: One side of the trapezoidal sliding block (403) is fixedly connected to a measuring instrument (410), and scale lines are engraved on the side wall of the measuring instrument (410).

4. A percutaneous minimally invasive lumbar pedicle screw fixation system and ancillary equipment according to claim 1, characterized in that: The outer wall of the shell (1) is fixedly connected to the airbag (409), and the measuring instrument (410) penetrates the airbag (409) and is slidably connected to the airbag block (411).

5. A percutaneous minimally invasive lumbar pedicle screw fixation system and ancillary equipment according to claim 1, characterized in that: A third groove (407) is provided on the opposite side of the special-shaped slider (404), and square blocks (408) are fixedly connected to both sides of the trapezoidal slider (403), and the special-shaped slider (404) is slidably connected to the trapezoidal slider (403).

6. A percutaneous minimally invasive lumbar pedicle screw fixation system and ancillary equipment according to claim 1, characterized in that: A protective cover is fixedly connected to the upper surface of the handle (3) to increase friction and ensure stability during use.

7. A percutaneous minimally invasive lumbar pedicle screw fixation system and ancillary equipment according to claim 1, characterized in that: A sliding rod (607) is fixedly connected to one side of the inner part of the fourth groove (601), and the sliding rod (607) is arranged in parallel with the screw rod (603), and a side of the screw rod slider (604) is provided with a sliding connection with the sliding rod (607).

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