A real-time monitoring of tension and pressure in intervertebral space elastic distraction device

Abstract

The present invention discloses a real-time monitoring intervertebral space elastic distraction device for tension and pressure, comprising a pedicle screw, an elastic element, a core shaft, and a monitoring device; the pedicle screw is provided with a breakable long arm for embedding the elastic element; the elastic element is sleeved on the core shaft, one end of the core shaft is provided with a U-shaped bracket, the monitoring device is provided with a mounting base, the mounting base is provided with a mounting hole corresponding to the U-shaped bracket, the mounting base drives the monitoring device to move on the U-shaped bracket, and the monitoring device is connected to the core shaft via a transmission device; the monitoring device is sleeved on the U-shaped bracket through the mounting base and connected to the elastic element through a connecting rod, the connecting rod passes through the elastic element and the mounting base, and one end of the connecting rod is connected to the pedicle screw. The present invention provides a continuous and stable traction force through the elastic element to widen the intervertebral space, and monitors the stress of the elastic rod in real time, providing a stable environment for the recovery of the lumbar vertebra.

Description

Technical Field

[0001] The present invention relates to the field of orthopedic surgical medical instruments, and more particularly to an intervertebral space elastic distraction device capable of monitoring tension and pressure in real time. Background Art

[0002] With the advent of an aging society, the incidence of lumbar fractures and lumbar disc herniation has increased year by year, and the proportion of patients requiring surgical treatment has increased. They have gradually become the main types of spinal surgery. After decades of development, pedicle screw technology has become a very mature spinal surgery technique. In recent years, the promotion of minimally invasive pedicle screw technology has also achieved certain clinical efficacy. Currently, percutaneous pedicle screw systems mainly use hollow pedicle screws, which require preset rod length and curvature, making the instrument design cumbersome and inconvenient to use.

[0003] The Chinese utility model patent with publication number CN202263044U discloses a percutaneous minimally invasive pedicle screw and rod internal fixation system, including a pedicle screw, a longitudinal connecting rod, a positioning needle and a guide needle for determining the screw placement position, an expansion core for expanding the screw placement channel, a screw guide sleeve, a screw inserter, a rod holder, a spreader pressurizer, an arm folding device for breaking the long arm of the pedicle screw, and a screw seat; wherein, the pedicle screw includes a screw body, a screw seat, two breakable long arms and a screw plug, the screw body is connected to the screw seat, the two breakable long arms are fixedly connected to the screw seat in opposite directions to form a U-shaped structure for embedding the longitudinal connecting rod, the two breakable long arms extend outside the skin incision, and the screw plug is used to screw into the U-shaped structure of the two breakable long arms to compress the longitudinal connecting rod. The length of the compression longitudinal connecting rod in the above technical solution cannot be flexibly adjusted, and the tensile pressure on the lumbar spine cannot be monitored in real time. As a result, the patient may suffer secondary injuries in daily life, and the doctor cannot monitor the patient's lumbar force data in real time, which causes inconvenience to further diagnosis. Summary of the Invention

[0004] The purpose of the present invention is to address the deficiencies in the existing technology and provide an intervertebral space elastic distraction device that monitors the tensile and compressive forces in real time. The device can provide continuous and stable traction force, widen the intervertebral space, provide a stable environment for the recovery of the lumbar spine, and perform real-time detection of the stress conditions of the human spine.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A device for elastically expanding the intervertebral disc for real-time monitoring of tension and pressure comprises a pedicle screw, an elastic element, a core shaft and a monitoring device; the pedicle screw is provided with a breakable long arm for embedding the elastic element; the elastic element is sleeved on the core shaft, one end of the core shaft is provided with a U-shaped bracket, and the monitoring device is provided with a mounting base, the mounting base is provided with a mounting hole corresponding to the U-shaped bracket, the mounting base drives the monitoring device to move on the U-shaped bracket, and the monitoring device is connected to the core shaft by a transmission device; the monitoring device is sleeved on the U-shaped bracket through the mounting base, and is connected to the elastic element through a connecting rod, the connecting rod passes through the elastic element and the mounting base, one end of the connecting rod is connected to the pedicle screw, and the connecting rod is provided with a U-shaped base for fixing the elastic element.

[0007] Furthermore, the inner surface of the breakable long arm has an internal thread, and a concave notch is provided at one end of the breakable long arm close to the nail seat.

[0008] Furthermore, the monitoring device is a sensor, and the sensor is connected to a data transmission module and a battery module.

[0009] Furthermore, the sensor is provided with a pressure sensitive element consisting of four pressure-sensitive resistors connected to form a Wheatstone bridge.

[0010] Furthermore, when the sensor detects stress, it converts the mechanical signal into a measurable electrical signal, and transmits it to the mobile terminal through a data transmission module, and the data transmission module is a Bluetooth module.

[0011] Furthermore, the transmission device is a conductive spring.

[0012] Furthermore, the core shaft, the elastic element and the mounting base are connected by a connecting rod.

[0013] Furthermore, the core shaft, the elastic element and the mounting base are respectively provided with through holes for cooperating with the connecting rod.

[0014] Furthermore, the mounting holes on the mounting base are two symmetrically distributed semicircular openings.

[0015] Furthermore, a cap is sleeved on one end of the breakable long arm close to the concave notch, and a cap holding hole is provided on the cap.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides continuous and stable traction force through the elastic element, widens the intervertebral space, and provides a stable environment for the recovery of the lumbar spine. The traction force is accurately controlled by stretching and shortening the length of the elastic element. At the same time, the core shaft can maintain a constant intervertebral height, avoid deviation of the elastic element's force, keep the elastic element within the elastic limit, and prevent the elastic element from losing elasticity or even fatigue fracture due to long-term stress.

[0018] The present invention monitors the stress condition of the elastic rod through a monitoring device, thereby achieving real-time monitoring of the stress condition of the human spine, making it convenient for doctors and patients to grasp the working condition of the intervertebral space elastic distraction internal fixation system and the biomechanical rehabilitation of the spine in real time, and helping patients with lumbar diseases to recover. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The schematic diagram of the structure of the pedicle screw is shown in Figure 1.

[0020] Figure 2 The schematic diagram of the monitoring device is shown in Figure 2.

[0021] Figure 3 This is a top view of the monitoring device.

[0022] Figure 4 is a side view of the monitoring device.

[0023] Figure 5 is a structural diagram of the elastic element.

[0024] Figure 6 It is a structural diagram of the core shaft.

[0025] Figure 7 This is a schematic diagram of the combination of the core shaft and the monitoring device.

[0026] Figure 8 is the structural diagram of the connecting rod.

[0027] Figure 9 It is a structural diagram of the hollow screw plug.

[0028] Figure 10 It is a cross-sectional view of the hollow screw plug.

[0029] Figure 11 It is a schematic diagram of the structure of the pedicle screw and the elastic element.

[0030] Figure 12 It is a structural diagram of the nut.

[0031] Among them, 1 is the nail body, 2 is the nail base, 3 is the internal thread, 4 is the breakable long arm, 5 is the external thread, 6 is the concave cut, 7 is the mounting hole, 8 is the monitoring device, 9 is the through hole on the mounting base, 10 is the mounting base, 11 is the elastic element, 12 is the rear end through hole, 13 is the front end through hole, 14 is the rear end through hole, 15 is the core shaft, 16 is the U-shaped bracket, 17 is the core shaft arm, 18 is the core shaft internal thread, 19 is the screw plug thread, 20 is the screw plug, 21 is the transmission device, 22 is the sensor, 23 is the connecting thread, 24 is the U-shaped base, 25 is the connecting rod, 26 is the U-shaped groove, 27 is the hollow screw plug, 28 is the cap holding hole on the hollow screw plug, 29 is the hollow screw plug internal thread, 30 is the cap, and 31 is the cap holding hole. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] Example 1

[0034] like Figures 1 to 12 As shown, this embodiment provides an elastic intervertebral space expansion device for real-time monitoring of tension and compression, comprising a pedicle screw, an elastic element 11, a core shaft 15, and a monitoring device 8. The pedicle screw comprises a screw body 1, a screw base 2, a breakable long arm 4, and a hollow screw plug 27. The screw body 1 is connected to the screw base 2, the upper end of the hollow screw plug is connected to the screw body 1, and the lower end of the hollow screw plug 27 is connected to the elastic element 11. The inner surface of the breakable long arm 4 has an internal thread 3 that matches the hollow screw plug 27, and the outer surface has an external thread 5 that matches the inner thread of the cap 30. A concave notch 6 is provided on the end of the breakable long arm 4 near the screw base 2 to facilitate accurate and quick cutting during surgery; a nut is provided on the end of the breakable long arm 4 near the concave notch 6 to prevent the screw plug from sliding out, thereby ensuring the stability of the assembly. The nut is provided with a cap holding hole 31, and the hollow screw plug is provided with a corresponding cap holding hole 28. The breakable long arms 4 are fixedly connected to the nail base 2 in an opposite manner and are used to embed the elastic element 11 .

[0035] The elastic element 11 in this embodiment comprises a front end, an elastic portion, and a rear end connected in sequence. The elastic element 11 is made of a titanium alloy with good biocompatibility. The elastic portion is spring-shaped and can be stretched or shortened, thereby providing a continuous and stable traction force to widen the intervertebral space. The elastic element 11 is mounted on a core shaft 15, which maintains a constant intervertebral height, prevents deviation of the applied force of the elastic element 11, and keeps the elastic element 11 within its elastic limit, preventing elastic loss or even fatigue fracture due to long-term stress. A U-shaped bracket 16 is provided at one end of the core shaft 15, and the U-shaped bracket is composed of two core shaft arms 17. A mounting base 10 is provided on the monitoring device 8, and a mounting hole 7 corresponding to the U-shaped bracket 16 is provided on the mounting base 10; the mounting holes 7 in this embodiment are two symmetrically distributed semicircular openings, which cooperate with the U-shaped bracket 16 to relatively fix the mounting base 10 and the monitoring device 8 on the core shaft 15, and drive the monitoring device 8 to move back and forth on the U-shaped bracket 16 through the mounting base 10. A screw plug 20 is installed at the open end of the U-shaped bracket 16 to limit the mounting base 10, and an internal thread 18 is provided on the core shaft to cooperate with the screw plug thread 19. The monitoring device 8 is mounted on the U-shaped bracket 16 through the mounting base 10, and is connected to the elastic element 11 through a connecting rod 25. The connecting rod 25 passes through the elastic element 11 and the mounting base 10. One end of the connecting rod 25 is provided with a connecting thread 23 connected to the hollow screw plug 27 on the pedicle screw. The hollow screw plug is provided with a hollow screw plug internal thread 29 that cooperates with the connecting thread 23. The connecting rod 25 is provided with a U-shaped base 24 for fixing the elastic element 11. The U-shaped base 24 is provided with a U-shaped groove 26, and the curvature of the U-shaped groove 26 cooperates with the elastic element 11.

[0036] In this embodiment, the monitoring device 8 is connected to the core shaft 15 through a transmission device 21. The transmission device 21 can transmit the force exerted on the elastic element 11 to the monitoring device 8, and the tension and compression of the transmission device 21 are used to measure the tension. Specifically, the monitoring device 8 in this embodiment is a sensor 22, the transmission device 21 is a conductive spring, and the sensor 22 is connected to a data transmission module and a battery module. A pressure sensitive element composed of four pressure-sensitive resistors connected to form a Wheatstone bridge is provided on the sensor 22. The transmission device 21 transmits the force exerted on the elastic element 11 to the sensor 22. When the sensor 22 detects stress, it converts the mechanical signal into a measurable electrical signal and transmits it to the mobile terminal through the data transmission module. The data transmission module used in this embodiment is a Bluetooth module. In order to further improve the stress detection effect, the present application can preset the stress range value through the mobile terminal, and issue an early warning when the stress condition exceeds the preset range value, so that medical staff can replace the gap elastic expansion internal fixation device in time and improve the treatment effect of lumbar spine disease.

[0037] Example 2

[0038] This embodiment provides an intervertebral space elastic distraction device for real-time monitoring of tension and compression, comprising a pedicle screw, an elastic element 11, a core shaft 15, and a monitoring device 8. The pedicle screw comprises a screw body 1, a screw base 2, a breakable arm 4, and a hollow screw plug. The screw body 1 is connected to the screw base 2, the upper end of the hollow screw plug is connected to the screw body 1, and the lower end of the hollow screw plug is connected to the elastic element 11. The inner surface of the breakable arm 4 has an internal thread that mates with the hollow screw plug, and the outer surface has an external thread that mates with the inner thread of the cap 30. A concave notch 6 is provided on the end of the breakable arm 4 near the screw base 2 to facilitate precise and rapid cutting during surgery. A nut is mounted on the end of the breakable arm 4 near the notch 6 to prevent the screw plug from slipping out and ensure the stability of the assembly. The nut is provided with a cap retaining hole 31, and the hollow screw plug is provided with a corresponding cap retaining hole 28. The breakable arm 4 is fixedly connected to the screw base 2 in a diametrical manner for embedding the elastic element 11.

[0039] The elastic element 11 in this embodiment comprises a front end, an elastic portion, and a rear end connected in sequence. The elastic element 11 is made of a titanium alloy with good biocompatibility. The elastic portion is spring-shaped and can be stretched or shortened, thereby providing a continuous and stable traction force to widen the intervertebral space. The elastic element 11 is mounted on a core shaft 15, which maintains a constant intervertebral height, prevents deviation of the applied force of the elastic element 11, and keeps the elastic element 11 within its elastic limit, preventing elastic loss or even fatigue fracture due to long-term stress. A U-shaped bracket is provided at one end of the core shaft 15, and the U-shaped bracket is composed of two core shaft arms 17. A mounting base 10 is provided on the monitoring device 8, and a mounting hole 7 corresponding to the U-shaped bracket 16 is provided on the mounting base 10; the mounting holes 7 in this embodiment are two symmetrically distributed semicircular openings, which cooperate with the U-shaped bracket 16 to relatively fix the mounting base 10 and the monitoring device 8 on the core shaft 15, and drive the monitoring device 8 to move back and forth on the U-shaped bracket 16 through the mounting base 10. A screw plug 20 is installed at the open end of the U-shaped bracket 16 to limit the mounting base 10, and an internal thread 18 is provided on the core shaft to cooperate with the screw plug thread 19. The monitoring device 8 is mounted on the U-shaped bracket 16 through the mounting base 10, and is connected to the elastic element 11 through a connecting rod 25. The connecting rod 25 passes through the elastic element 11 and the mounting base 10. One end of the connecting rod 25 has a connecting thread 23 connected to the hollow screw plug 27 on the pedicle screw. The hollow screw plug is provided with a hollow screw plug internal thread 29 that cooperates with the connecting thread 23. The connecting rod 25 is provided with a U-shaped base 24 for fixing the elastic element 11. The U-shaped base 24 is provided with a U-shaped groove 26, and the curvature of the U-shaped groove 26 cooperates with the elastic element 11.

[0040] In this embodiment, the core shaft 15, elastic element 11, and mounting base 10 are connected by a connecting rod 25. The core shaft 15, elastic element 11, and mounting base 10 are each provided with a through hole for mating with the connecting rod 25. The front and rear ends of the elastic element 11 are each provided with a through hole. The inner diameter of the front end is larger than that of the rear end. The front end of the elastic element 11 partially wraps around the monitoring device 8, providing protection and fixation. The front end through hole 13 of the elastic element 11 is aligned with the through hole 9 on the mounting base, ensuring that the sensor 22 can be fixed to the elastic element 11 when the connecting rod 25 is inserted, thereby enabling real-time pressure to be measured. The rear end through hole 14 of the elastic element 11 corresponds to the through hole on the core shaft 15. The connecting rod 25 passes through the through hole, keeping the elastic element 11 and the core shaft 15 fixed.

[0041] In this embodiment, the monitoring device 8 is connected to the core shaft 15 through a transmission device 21. The transmission device 21 can transmit the force exerted on the elastic element 11 to the monitoring device 8, and the tension and compression of the transmission device 21 are used to measure the tension. Specifically, the monitoring device 8 in this embodiment is a sensor 22, the transmission device 21 is a conductive spring, and the sensor 22 is connected to a data transmission module and a battery module. A pressure sensitive element composed of four pressure-sensitive resistors connected to form a Wheatstone bridge is provided on the sensor 22. The transmission device 21 transmits the force exerted on the elastic element 11 to the sensor 22. When the sensor 22 detects stress, it converts the mechanical signal into a measurable electrical signal and transmits it to the mobile terminal through the data transmission module. The data transmission module used in this embodiment is a Bluetooth module. In order to further improve the stress detection effect, the present application can preset the stress range value through the mobile terminal, and issue an early warning when the stress condition exceeds the preset range value, so that medical staff can replace the gap elastic expansion internal fixation device in time and improve the treatment effect of lumbar spine disease.

[0042] Example 3

[0043] This embodiment provides an intervertebral space elastic distraction device for real-time monitoring of tension and compression, comprising a pedicle screw, an elastic element 11, a core shaft 15, and a monitoring device 8. The pedicle screw comprises a screw body 1, a screw base 2, a breakable arm 4, and a hollow screw plug. The screw body 1 is connected to the screw base 2, the upper end of the hollow screw plug is connected to the screw body 1, and the lower end of the hollow screw plug is connected to the elastic element 11. The inner surface of the breakable arm 4 has an internal thread that mates with the hollow screw plug, and the outer surface has an external thread that mates with the inner thread of the cap 30. A concave notch 6 is provided on the end of the breakable arm 4 near the screw base 2 to facilitate precise and rapid cutting during surgery. A nut is mounted on the end of the breakable arm 4 near the notch 6 to prevent the screw plug from slipping out and ensure the stability of the assembly. The nut is provided with a cap retaining hole 31, and the hollow screw plug is provided with a corresponding cap retaining hole 28. The breakable arm 4 is fixedly connected to the screw base 2 in a diametrical manner for embedding the elastic element 11.

[0044] The elastic element 11 in this embodiment comprises a front end, an elastic portion, and a rear end connected in sequence. The elastic element 11 is made of a titanium alloy with good biocompatibility. The elastic portion is spring-shaped and can be stretched or shortened, thereby providing a continuous and stable traction force to widen the intervertebral space. The elastic element 11 is mounted on a core shaft 15, which maintains a constant intervertebral height, prevents deviation of the applied force of the elastic element 11, and keeps the elastic element 11 within its elastic limit, preventing elastic loss or even fatigue fracture due to long-term stress. A U-shaped bracket is provided at one end of the core shaft 15, and the U-shaped bracket is composed of two core shaft arms 17. A mounting base 10 is provided on the monitoring device 8, and a mounting hole 7 corresponding to the U-shaped bracket 16 is provided on the mounting base 10; the mounting holes 7 in this embodiment are two symmetrically distributed semicircular openings, which cooperate with the U-shaped bracket 16 to relatively fix the mounting base 10 and the monitoring device 8 on the core shaft 15, and drive the monitoring device 8 to move back and forth on the U-shaped bracket 16 through the mounting base 10. A screw plug 20 is installed at the open end of the U-shaped bracket 16 to limit the mounting base 10, and an internal thread 18 is provided on the core shaft to cooperate with the screw plug thread 19. The monitoring device 8 is mounted on the U-shaped bracket 16 via the mounting base 10 and connected to the elastic element 11 via a connecting rod 25. The connecting rod 25 extends through the elastic element 11 and the mounting base 10. One end of the connecting rod 25 has a connecting thread 23 that connects to a hollow screw plug 27 on the pedicle screw. The hollow screw plug has an internal hollow screw thread 29 that mates with the connecting thread 23, thereby connecting to the pedicle screw. The connecting rod 25 has a U-shaped base 24 for securing the elastic element 11. The U-shaped base 24 has a U-shaped groove 26, the curvature of which mates with the elastic element 11. In this embodiment, the core shaft 15, the elastic element 11, and the mounting base 10 are connected by the connecting rod 25. The core shaft 15, the elastic element 11, and the mounting base 10 are each provided with a through hole for mating with the connecting rod 25. The front and rear ends of the elastic element 11 each have a through hole, with the inner diameter of the front end being larger than that of the rear end. The front end of the elastic element 11 partially encases the monitoring device 8, providing protection and fixation. The through hole 13 at the front end of the elastic element 11 is aligned with the through hole 9 on the mounting base to ensure that the sensor 22 and the elastic element 11 can be fixed when the connecting rod 25 is inserted, and the real-time pressure can be measured; the through hole 14 at the rear end of the elastic element 11 corresponds to the through hole 9 on the core shaft 15, and the connecting rod 25 passes through the through hole 9 to keep the elastic element 11 and the core shaft 15 fixed.

[0045] In this embodiment, the monitoring device 8 is connected to the core shaft 15 through a transmission device 21. The transmission device 21 can transmit the force exerted on the elastic element 11 to the monitoring device 8, and the tension and compression of the transmission device 21 are used to measure the tension. Specifically, the monitoring device 8 in this embodiment is a sensor 22, the transmission device 21 is a conductive spring, and the sensor 22 is connected to a data transmission module and a battery module. A pressure sensitive element composed of four pressure-sensitive resistors connected to form a Wheatstone bridge is provided on the sensor 22. The transmission device 21 transmits the force exerted on the elastic element 11 to the sensor 22. When the sensor 22 detects stress, it converts the mechanical signal into a measurable electrical signal and transmits it to the mobile terminal through the data transmission module. The data transmission module used in this embodiment is a Bluetooth module. In order to further improve the stress detection effect, the present application can preset the stress range value through the mobile terminal, and issue an early warning when the stress condition exceeds the preset range value, so that medical staff can replace the gap elastic expansion internal fixation device in time and improve the treatment effect of lumbar spine disease.

[0046] The detection process of the intervertebral space elastic distraction device for real-time monitoring of tension and pressure provided in this embodiment is as follows:

[0047] When the elastic element 11 is stretched or squeezed by the human skeleton, the elastic element 11 will also stretch or compress accordingly. The force exerted on the elastic element 11 is transmitted to the four pressure-sensitive resistors in the sensor 22 that can sense the mechanical signal through the transmission device 21, and the mechanical signal is converted into a measurable electrical signal to detect the force condition of the elastic element 11. Finally, the sensing signal is transmitted to the external mobile terminal through the Bluetooth module embedded in the sensor 22 for real-time monitoring of the force condition of the intelligent intervertebral disc elastic distraction internal fixation system, thereby achieving real-time detection of the force condition of the human spine, which is convenient for doctors and patients to grasp the working condition of the intervertebral disc elastic distraction internal fixation system and the biomechanical rehabilitation of the spine in real time.

[0048] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0049] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A real-time monitoring of tension and pressure of intervertebral disc elastic distraction device, characterized in that: The pedicle screw comprises a pedicle screw, an elastic element, a core shaft and a monitoring device; the pedicle screw is provided with a breakable long arm for embedding the elastic element; the elastic element is sleeved on the core shaft, one end of the core shaft is provided with a U-shaped bracket, and the monitoring device is provided with a mounting base, the mounting base is provided with a mounting hole corresponding to the U-shaped bracket, and the mounting base drives the monitoring device to move on the U-shaped bracket, and the monitoring device is connected to the core shaft by a conductive spring; the monitoring device is sleeved on the U-shaped bracket through the mounting base, and the core shaft, the elastic element and the mounting base are connected by a connecting rod, and the core shaft, the elastic element and the mounting base are respectively provided with through holes for cooperating with the connecting rod, wherein the front end and the rear end of the elastic element are respectively provided with through holes, the front end through hole of the elastic element is aligned with the through hole on the mounting base and the connecting rod is inserted to fix the sensor to the elastic element, the rear end through hole of the elastic element corresponds to the through hole on the core shaft, and the connecting rod passes through the through hole to fix the elastic element and the core shaft, one end of the connecting rod is connected to the pedicle screw, and the connecting rod is provided with a U-shaped base for fixing the elastic element.

2. The intervertebral space elastic distraction device for real-time monitoring of tension and pressure according to claim 1, characterized in that: The pedicle screw includes a nail body, a nail seat, a breakable long arm and a hollow screw plug. The nail body is connected to the nail seat, the upper end of the hollow screw plug is connected to the nail body, and the lower end of the hollow screw plug is connected to the elastic rod. The inner surface of the breakable long arm has an internal thread, and a concave notch is provided on the end of the breakable long arm near the nail seat.

3. The intervertebral space elastic distraction device for real-time monitoring of tension and pressure according to claim 1, characterized in that: The monitoring device is a sensor, and the sensor is connected to a data transmission module and a battery module.

4. The intervertebral space elastic distraction device for real-time monitoring of tension and pressure according to claim 3, characterized in that: The sensor is provided with a pressure sensitive element consisting of four pressure-sensitive resistors connected to form a Wheatstone bridge.

5. The intervertebral space elastic distraction device for real-time monitoring of tension and pressure according to claim 3, characterized in that: When the sensor detects stress, it converts the mechanical signal into a measurable electrical signal, and transmits the signal to the mobile terminal via a data transmission module, which is a Bluetooth module.

6. The intervertebral disc elastic distraction device for real-time monitoring of tension and compression according to claim 1, characterized in that: The mounting holes on the mounting base are two symmetrically distributed semicircular openings.

7. The intervertebral space elastic distraction device for real-time monitoring of tension and compression according to claim 2, characterized in that: One end of the breakable long arm close to the concave notch is sleeved with a nut, and the nut is provided with a nut holding hole.

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