161 results about "Thoracic spine" patented technology

The invention provides a seat comfort optimization calculation method based on a sensor and AI modeling, and the method comprises the steps: collecting the pressure distribution data of the sitting posture of a passenger and a spine contact area in real time through an attitude sensor and a pressure sensor which are disposed on a seat; a seat supporting area is divided into a cervical vertebra area, a thoracic vertebra area, a lumbar vertebra area and a sacrococcygeal area, and a pressure distribution prediction model of each area is established; constructing an input vector based on the average pressure, the maximum pressure, the pressure gravity center, the body type parameter and the pathological weight factor, and outputting a target support pressure value, a pressure avoiding curve and a neighbor cell migration proportion of each partition by using an artificial intelligence model; dynamic adjustment is achieved through the partitioned air bag and the driving unit, and secondary fine adjustment and protection are achieved in combination with feedback monitoring. The system comprises a posture sensing module, a pressure sensing module, a data processing module, a model building module, a regulation and control execution module and a feedback monitoring module, and self-adaptive regulation and control of different areas of the spine of a passenger can be achieved.

The invention belongs to the technical field of medical imaging and digital twinning, and discloses a thoracic cavity whole organ system level lung four-dimensional EIT detection digital motif and a library building method, and the method comprises the following steps: S1) segmenting multiple organs such as double lungs, heart, sternum, rib and thoracic vertebra central axis skeleton, main bronchus and esophagus based on an individual CT image, and building a three-dimensional geometric model integrated with an EIT electrode array; s2) simulating breathing dynamic deformation by using a solid mechanical model; s3) establishing a coupling relationship between deformation and conductivity, and generating dynamic three-dimensional conductivity distribution; s4) solving an electromagnetic field positive problem, and generating a virtual EIT voltage database synchronous with respiration; the invention also covers pathological model integration and data enhancement strategies. According to the method, a high-fidelity, large-scale and diversified EIT virtual data set can be generated, core data support is provided for training and verifying an AI intelligent reconstruction algorithm, and a model foundation is laid for developing a lung function dynamic digital twinning system.

The invention relates to the technical field of vehicle safety evaluation, in particular to a finite element model modeling method capable of reproducing chest torsion performance. Comprising the steps that the geometric contour of a thoracic cavity is extracted through a lying posture tomography image, the thoracic cavity structure comprises a sternum structure, a thoracic vertebra structure and a rib structure, the lobe posterior angle of the thoracic vertebra is corrected based on a standing posture X-ray computed tomography image, and a three-dimensional geometric model of the thoracic cavity is reconstructed; establishing a thoracic cavity finite element model through grid division and material attribute definition; establishing a spherical hinge between the thoracic vertebra transverse process and the rib head; assembling the thoracic cavity finite element model into a whole person element model; and carrying out parameterized model optimization. According to the technical scheme, the real anatomical structure and the chest response data of the multi-direction complex collision working condition can be combined to establish the high-biological fidelity finite element model capable of reproducing the chest torsion performance, so that the chest injury condition in the VRU traffic accident can be predicted more accurately.

The invention relates to the technical field of spine correction, in particular to a spine correction traction force control method and system, and the safety, effectiveness and intelligent level of spine correction treatment are improved. The method comprises the following steps: dividing a spine into at least three sub-regions according to an anatomical structure of the spine; the at least three sub-regions comprise a cervical vertebra region, a thoracic vertebra region and a lumbar vertebra region; performing biomechanical data acquisition on each sub-region to obtain a spine state feature set corresponding to each sub-region; the spine state feature set at least comprises a pressure distribution feature, a bending angle feature and a muscle tension feature; for different sub-regions, inputting the spine state feature set into a corresponding spine correction state evaluation model to obtain a spine correction state score of each sub-region; the anatomical structure and functional importance of the spine are considered, and the comprehensive influence weight of each sub-region is obtained from a preset weight database;

The invention discloses a teenager idiopathic scoliosis auxiliary diagnosis and evaluation system based on an X-ray film, and relates to the technical field of medical instruments. Comprising an image preprocessing module, a key point detection module, a Cobb angle measurement module and a Lenke typing module. According to the teenager idiopathic scoliosis auxiliary diagnosis and evaluation system based on the X-ray film, key point detection, automatic Cobb angle measurement and Lenke typing including bending type, lumbar vertebra correction type and thoracic vertebra sagittal view kyphosis typing of the standing position, the Bending position and the lateral position spine X-ray film are achieved, the accuracy, efficiency and reliability of auxiliary diagnosis are remarkably improved, and the system is suitable for popularization and application. And comprehensive support is provided for clinical diagnosis and treatment decision of scoliosis.

The invention discloses a spine parameter measurement and spine automatic typing method comprising the following steps: obtaining four spine original images of a to-be-detected target in different directions, preprocessing the spine original images, and sending the preprocessed spine original images into an image neural network to obtain key information in the images; and performing parameter measurement and analysis according to the key information to obtain various parameters. And calculating according to the lateral bending Cobb angle, the segment and the sagittal posterior convex angle to obtain a lateral bending type. And judging the relative position relationship between the sacrum perpendicular bisector CSVL and the vertebral pedicle mask to obtain the corrected type of the lumbar curvature. And judging according to the thoracic vertebra posterior lobe of the sagittal plane to obtain a thoracic vertebra sagittal plane correction type. And combining the lateral bending type, the waist bending correction type parting and the thoracic vertebra sagittal plane correction type to obtain a complete Lenke parting. Through automatic identification and automatic calculation, the popularization rate of spine radiation parameter measurement can be effectively improved without professional requirements and thresholds, and the method has very high clinical practical significance and popularization significance.

The invention provides a human body posture abnormity assessment method based on a body measurement all-in-one machine, and the method comprises the steps: obtaining the video data, collected by multiple cameras, of the bending and foot touching actions of a subject, carrying out the preliminary positioning of a spine, a lumbar vertebra and thoracic vertebra transition region, and key points of legs, and extracting the coordinates of the key points; leg joint angle change is calculated according to the leg key point coordinates, if the angle change amplitude is lower than a preset threshold value, it is judged that leg flexibility is insufficient, a key point tracking strategy is adjusted, and the tracking density of a leg area is increased; according to the posture abnormity score, generating a posture abnormity report of the bending and foot touching actions of the subject, and marking specific positions of spine curvature abnormity, stiffness increase of a transition area between the lumbar vertebra and the thoracic vertebra and insufficient leg flexibility; and dynamically updating a key point tracking strategy and an attitude anomaly judgment threshold according to the action normativity score, and optimizing the accuracy and real-time performance of subsequent action evaluation.

The utility model discloses a neck protection pillow which comprises a pillow body, the pillow body is made of soft foaming materials through mold foaming forming, the pillow body comprises an upper surface, a lower surface, a front side and a rear side, the upper surface is a pillow face, the front side is a sleeping side, the rear side is a relaxing side, and a tongue-shaped supporting block is arranged in the middle of the sleeping side in a protruding mode. Wherein the joint of the tongue-shaped supporting block and the two ends of the sleeping side of the pillow body is bent inwards, a smooth head pit is formed in the center of the pillow face, the two sides of the head pit are each provided with a first arc-shaped groove, and meanwhile the joint of the edge of the pillow face and the edge of the sleeping side is a cervical vertebra supporting area. An arc-shaped groove II is formed in the lower surface of the pillow main body and is close to the rear side, namely the relaxing side; and a cervical vertebra relaxing module is arranged in the arc-shaped groove II. According to the utility model, the cervical vertebra is in a natural bending state and the thoracic vertebra is supported during lying, the ears are relaxed and are not pressed during sleeping on one side, and the cervical vertebra and the thoracic vertebra are in the same horizontal line.

The invention relates to the technical field of rehabilitation robots, in particular to a rigid-flexible coupling trunk rehabilitation robot and a control method thereof. The invention comprises: a flexible wearing garment; the upper-layer protector is mounted at the upper part of the flexible wearing clothes; the lower-layer protector is mounted at the lower part of the flexible wearing clothes; two lumbar vertebra branch mechanisms; the URS branch chain mechanism is used for adjusting the rehabilitation center to be consistent with the lumbar vertebra rotation center of the human body; the thoracic vertebra branch mechanism is arranged on the inner wall of the upper-layer protector; during wearing, the upper-layer protector is worn at the thoracic vertebra position of a human body, and the lower-layer protector corresponds to the hip joint of the human body. The thoracic vertebra branch mechanism is arranged on the upper-layer protector, the lumbar vertebra branch mechanism is arranged between the upper-layer protector and the lower-layer protector, and the thoracic vertebra branch mechanism and the lumbar vertebra branch mechanism act on the thoracic vertebra and the lumbar vertebra in a synergistic mode, so that partitioned targeted rehabilitation is achieved, namely independent stretching, forward flexion, backward stretching and lateral flexion rehabilitation training of the thoracic vertebra is achieved; therefore, the rehabilitation action of the human trunk is more targeted, the rehabilitation effect is good, and the applicability and the rehabilitation efficiency in the rehabilitation process are greatly improved.

The invention relates to the technical field of medical instruments, and discloses a scoliosis traction treatment frame and method.The scoliosis traction treatment frame comprises a supporting frame, a traction component, a traction component and a traction component, the traction assembly is connected with the stretching assembly and used for finely stretching the spine at the cervical vertebra position of the patient; the lifting assembly is arranged on the supporting frame, and the lifting assembly is connected with the adjusting assembly and used for adjusting the height of the adjusting assembly; the fixing assembly is connected with the adjusting assembly and used for fixing the waist or the back of the patient. Coronary plane traction correction is carried out on thoracic vertebra and lumbar vertebra coronal scoliosis through the waist movable device, the scoliosis mainly occurs in thoracic lumbar vertebrae, up-down displacement can be achieved, meanwhile, left and right coronal plane pushing can be achieved, and the thoracic lumbar vertebrae scoliosis can be accurately corrected.

A spine force modulating assembly for supporting a human spine that prevents, slows down, and or treats spine-related disorders. The spine force modulating assembly includes a frame of a length proportional to a distance between a third thoracic spine bone and a first sacral spine bone of a spine of a wearer of the spine force modulating assembly. The frame is of a “S” shape and configured to support a spine portion between the third thoracic spine bone and the first sacral spine bone. The spine force modulating assembly further includes a pair of should straps extending from near the upper end of the frame and a pair of waist straps extending from near the lower end of the frame.

Systems and methods for modeling anatomical changes in a patient after installation of a patient-specific implant are disclosed. The system can model changes to a thoracic spine based on changes to the lumbar spine in a patient. The system can calculate and display reciprocal changes to nearby anatomy due to correction of index anatomy. For example, the system models the anatomical changes to the thoracic and cervical spines based on corrections to the lumbar spine.

The invention provides a collision dummy, relates to the technical field of collision dummies, and can improve the reliability of collision test data. A thoracic section spine structure of the collision dummy comprises at least two first rigid thoracic vertebra pieces and at least two flexible thoracic vertebra pieces, the first rigid thoracic vertebra pieces and the flexible thoracic vertebra pieces are alternately arranged in the extending direction of the thoracic section spine structure and are sequentially connected end to end, and rib pieces are fixedly connected with the first rigid thoracic vertebra pieces. The rib parts and the first rigid thoracic vertebra parts are arranged in a one-to-one correspondence mode, and the at least two rib parts are slidably connected with the sternum part in the extending direction of the thoracic segment spine structure. According to the collision dummy provided by the invention, compression and extension of the flexible thoracic vertebra piece enable the thoracic segment spine structure to generate motions such as bending, extension and lateral bending, so that the collision dummy can generate responses such as forward bending, backward bending and lateral turning, and the injury condition of the collision dummy in collision is relatively consistent with the injury condition of a real human body; the reliability of collision test data can be improved.

A method and apparatus for identifying back acupuncture points, and a moxibustion robot are provided, which belong to the technical field of identification of acupuncture points. The method includes: acquiring skeleton key feature points of a human body image, and identifying a plurality of back meridians on a back based on the skeleton key feature points; identifying a plurality of thoracic vertebra positions and a plurality of lumbar vertebra positions of the human body image based on the skeleton key feature points; and identifying back acupuncture points based on the plurality of thoracic vertebra positions, the plurality of lumbar vertebra positions, and the back meridians. Manual marking is not required, and the thoracic vertebra positions and the lumbar vertebra positions are used as references for the back acupuncture points. The accuracies of the identified back acupuncture points are improved.

The utility model relates to the technical field of medical rehabilitation, in particular to a cervical vertebra, thoracic vertebra and lumbar vertebra of a spine of a human body have various diseases, and when medical staff carry out treatment, patients are often suggested to support injured parts by using some appliances or other methods, so that the injured parts return to the physiological curvature which is naturally grown by the human body. However, existing appliances in the medical field are not good in effect, in order to solve the technical problem, the technical scheme is that the combined three-vertebra rehabilitation pillow comprises a bottom cushion, a pillow cushion, a lumbar vertebra cushion, a cervical vertebra cushion and a binding belt, when a user is supported to be in a supine state, the cervical vertebra, the thoracic vertebra and the lumbar vertebra return to the physiological bending degree at the same time, and the cervical vertebra, the thoracic vertebra and the lumbar vertebra return to the physiological bending degree. And a stretching (or relaxing) state is formed under the action of gravity, so that conditions are created for maintaining the health of the spine of a human body and removing injuries and diseases of the spine.

A leg bolster elevation wedge includes: a main body, which includes a bottom surface, a top surface, a front end surface, a rear end surface, a left end surface, and a right end surface. The left end surface is arranged at an angle of 60° and has a first predetermined length. A rounded support portion is arranged between the left end surface and the top surface. The top surface is arranged at an angle of 30° and has a second predetermined length. The left end surface, the rounded support portion, and the top surface are positionable to contact and support a user's hips, thigh rears, knee pits, and shank rears in order to relax and decompress the user's lumbar spine, thoracic spine, vertebra and pelvis area, muscles, and ligaments. The angle between the left end surface and the top surface helps distribute weight in an ergonomic manner.

The application provides a crash dummy, and relates to the technical field of crash dummies, and can improve the reliability of crash test data. A chest segment spine structure of the crash dummy comprises at least two first rigid thoracic vertebra pieces and at least two flexible thoracic vertebra pieces, the first rigid thoracic vertebra pieces and the flexible thoracic vertebra pieces are alternately arranged along the extension direction of the chest segment spine structure and sequentially connected in a head-to-tail mode, a rib piece is fixedly connected with the first rigid thoracic vertebra piece, the rib piece is arranged in one-to-one correspondence with the first rigid thoracic vertebra piece, and the at least two rib pieces are all slidably connected with a sternum piece along the extension direction of the chest segment spine structure. The compression and expansion of the flexible thoracic vertebra piece enable the chest segment spine structure to produce bending, stretching and lateral bending movements, the crash dummy can produce forward bending, backward bending and lateral turning responses, the injury condition of the crash dummy in a crash is consistent with the injury condition of a real human body, and the reliability of crash test data can be improved.

This invention relates to the field of cervical and lumbar spine rehabilitation technology, and more particularly to a cervical and lumbar spine rehabilitation training system integrating posture monitoring and motion guidance. The system includes the following modules: a data acquisition and preprocessing module, used to collect real-time three-dimensional posture data of the user's cervical, thoracic, and lumbar spine and related joints, and generate motion data after standardization processing; and a micro-deviation analysis module, which generates a personalized micro-deviation accumulation model based on the motion data, predicts micro-deviations in real time, and generates personalized training adjustment strategies based on the user's physiological characteristics, historical training data, and current movements. In this invention, the micro-deviation analysis module extracts joint position, angle, velocity, and acceleration features from the standardized motion data, and combines this with nonlinear system modeling, user physiological characteristics, and historical training data to realize a personalized micro-deviation accumulation model, generating real-time micro-deviation prediction and training adjustment strategies.

The utility model relates to the field of spine correction, and discloses a scoliosis corrector for teenagers, which is used for adjusting and correcting sleeping postures at night and comprises a correction plate, the front side and the rear side of the left side of the bottom of the correction plate are fixedly connected with first supporting plates, and the front side and the rear side of the right side of the bottom of the correction plate are fixedly connected with second supporting plates. The front faces of the first supporting plate and the second supporting plate are both in threaded connection with connecting rods, and the front sides of the tops of the connecting rods are movably connected with movable plates. According to the waist correcting device for the teenager, through mutual cooperation of the structures of the screw rod, the adjusting block and the fixing rod, after the adjusting block is driven by the screw rod, the limiting plate drives the extrusion cylinder to conduct sleeping posture correcting work on the lateral bending positions of the lumbar vertebra and the thoracic vertebra of the teenager, and the purpose that the waist of the teenager is corrected when the teenager lies on the correcting plate to sleep is achieved; the lateral bending parts of the lumbar vertebrae and the thoracic vertebrae on the two sides of the teenager are also corrected, scoliosis caused by improper sleeping postures is prevented, and the teenager can be prevented from falling from the correction plate due to the change of the sleeping postures during sleeping.

Provided are bone plates and systems including such plates. The present plates may be used for example, to accommodate spinolaminar junction or as a plate locking screw system for posterior spinal fixation in the cervical, thoracic, lumbar and sacral spine, extremities, pelvis and long bone fixation. The present devices and systems may include modular plates, rods and rails. Devices and systems herein relate to both open methods and minimally invasive surgery applications. Also provided are locking plates and systems relating to tethering applications. Further provided are kits including any of the present kits or devices, and methods including insertion of any of the present plates or systems into a patient.

This utility model belongs to the field of back correction technology, specifically referring to a hunchback correction training device, including a base plate; a support plate is provided above the base plate and connected to it; an airbag is provided between the base plate and the support plate to make the support plate bend. The airbag is located at one end of the support plate below the base plate, while no airbag is provided at the other end of the support plate. This makes it easier for one end of the support plate to deform under force, while the other end is more easily deformable. The better support allows the scapula to expand more easily when the user lies on the curved support plate, resulting in a better correction effect. The other end, being more easily deformable downwards, can better fit the area below the user's scapula, conforming to the shape and structure of the human cervical and thoracic vertebrae.

The utility model discloses a thorax stretcher which comprises a backrest part and a headrest part, the backrest part is adjacent to the headrest part, a radian is formed from one end side to the other end side of the backrest part, the included angle between the position where a thoracic vertebra section abuts against in the radian and the ground ranges from 30 degrees to 80 degrees anticlockwise, and an activity space for spine and thorax three-dimensional stretching is reserved in the left-right direction of the backrest part; compared with the prior art, the chair is more in accordance with the ergonomic design, particularly, the arc-shaped support extending in the length direction of the backrest part is combined with an activity space in the left-right direction of the spine and the thorax so that the thorax can be opened while the spine is integrally stretched in a three-dimensional mode, the protruding keel can abut against the spine spinous process, and the stretching action is more accurate and in place comprehensively; in addition, related muscles are further stretched through good stretching of the arms, and meanwhile thorax opening is further facilitated.

Back element or arm or leg module with modular or textile-integrated impulse structure for movement support via sensory detection and feedback of posture and movement parameters, comprising at least one element for mechanical, thermal or sensory stimulation, whereby structured impulses are generated locally or dynamically and transmitted to defined back regions (e.g. cervical spine, thoracic spine, lumbar spine). The system is modularly adaptable, can be worn close to the body, and functions actively or passively, independent of the wearer. The impulses serve to consciously coordinate and correct posture, movement, and inner perception and are activated by textile or electronic control depending on the parameter input. The module has a fiber- and muscle-like structure and generates dynamic restoring forces that support or harmonize physiological leg movement, particularly through segmented fibers or reinforcements in a physiological or geometric arrangement.

The present invention relates to a dynamic stabilization system for spine, the dynamic stabilization system comprises a joint head, a joint cavity, a connecting block, a connecting shaft, and a fixing nail; the joint head comprises a joint head head and a connecting rod, the joint head head is fixed at one end of the connecting rod; two connecting blocks are symmetrically arranged on both sides of the connecting rod and fixed by the fixing nail; the joint cavity comprises an acetabulum and a connecting rod, the acetabulum is fixed at one end of the connecting rod; the joint head head is installed in the acetabulum, and the joint head head can rotate a predetermined bending angle in the acetabulum; the connecting rod has a through groove, the connecting shaft is placed in the through groove, and is fixed by the fixing nail; the dynamic stabilization system is fixed to the corresponding vertebral body of the spine by a pedicle screw. The present invention can be applied to the dynamic stabilization of the spine in cervical, thoracic and lumbar surgeries, and can not only adapt to the changes of different spinal curvatures, but also reduce the stress concentration phenomenon.

A lateral patient positioning system may include a pelvic bolster assembly and a thoracic bolster assembly. Each of the assemblies may be attached to a conventional surgical table frame by the surgical table frame’s longitudinal rails. A plurality of adjustment mechanisms and components are provided to allow for easy and safe manipulation of a patient before and during surgery, including sagittal and / or coronal adjustment of a patient in a lateral position.

The present devices and methods provide a fixation system for restoring a posterior tension band in a patient. A first bracket is mounted to a first posterior boney landmark of a first lamina-spinous process; and a second bracket is mounted to a second posterior boney landmark of a second lamina-spinous process. A flexible tensioning cord is fastened between the first bracket and the second bracket, tensioned to induce lordosis in the lumbar spine; less tension would maintain kyphosis in the thoracic spine. A system for implanting the assembly includes a tensioning tool having a bracket grasping jaw half pivotally opposing a cord grasping jaw half, where their separation tensions the flexible tensioning cord while the cord is being coupled to one or more brackets. Advantageously, this permits restoration of the lumbar or thoracic posterior tension band in a motion sparing (non-fusion) manner and allows complete removal of the lamina / spinous process at a single or multiple levels.

The invention discloses a driving method, a matching method, a motion abnormity determination method, a storage medium and equipment based on scoliosis motion capture pairing, and belongs to the technical field of evaluation of spinal deformity and human spinal motion characteristics. In order to solve the problem that in existing spine motion analysis, the driving effect is not ideal due to the fact that all vertebral bodies of the waist and the chest are driven according to a certain fixed proportion, firstly, a trunk model is constructed, the thoracic vertebra and the lumbar vertebra can move independently, and the thoracic vertebra and the lumbar vertebra are connected through intervertebral discs in a spherical hinge mode; marking points of bony mark positions at the thoracic vertebra spinous process and the lumbar sacral vertebra spinous process are constructed on the trunk model, and marking points of bony mark positions at the sacral vertebra spinous process, the acromion of the left shoulder bone and the acromion of the right shoulder bone are constructed; an optical mark corresponding to the bony marker position mark point is pasted on the skin surface of the spine spinous process of the subject, an action capture mark point is obtained, and a redundant driving mode is adopted for driving.

A China-hemp breathable pillow comprises a pillow body and a breather pipe, the pillow body comprises a main pillow, a left auxiliary pillow and a right auxiliary pillow, the main pillow is lower than the left auxiliary pillow and the right auxiliary pillow, the middle lower layer of the pillow body is made of natural rubber, the middle upper layer of the pillow body is filled with China-hemp seed shells, the breather pipe is arranged in the pillow body, and the vent pipe is arranged in the pillow body. The two ends of the ventilation pipe are sealed through net windows, and lug holes are formed in the left auxiliary pillow and the right auxiliary pillow. The hemp seed shells are added into the pillow to serve as filler, and the pillow has the remarkable beneficial effects of resisting bacteria and inhibiting mites; the cervical vertebra is normally and physiologically bent forwards by 15 degrees when the user lies on the back, the cervical vertebra and the thoracic vertebra can still be kept on the same horizontal line when the user lies on the side, and the beneficial effects of correcting the cervical vertebra and relieving muscular tension and strain of the neck and the shoulder are achieved; through the design of the breather pipe in the pillow body and the ear holes in the left auxiliary pillow and the right auxiliary pillow, the beneficial effects that ear nerves are prevented from being pressed when a user lies on the side, airflow in the pillow body is smooth, and the sleep quality is improved are achieved.

During Tumor Treating Fields (TTFields) therapy, one or more pairs of electrode assemblies are used to impose an alternating electric field to the tumor. However, when the cancer cells are distributed among two or more different locations within the subject's body, it can be difficult to achieve sufficient field intensities in all of the different locations. By positioning one pair of electrode assemblies on the left half of the subject's scalp and the right side of the subject's posterior thorax, and positioning another pair of electrode assemblies on the right half of the subject's scalp and the left side of the subject's posterior thorax, it becomes possible to achieve sufficient field intensities in the following three locations simultaneously: (i) an upper half of the subject's thoracic spine, (ii) the subject's cervical spine, and (iii) the subject's head.

The invention belongs to the field of thoracic vertebra posterior surgical instruments, and particularly relates to an intraoperative lifting device for thoracic vertebra posterior surgery, which comprises a steel plate I, a steel plate II, a conical plate I and a conical plate II, the steel plate II is arranged at the rear end of the steel plate I, side frames are fixed on the two sides of the front part of the steel plate II, adjusting grooves are formed in the two sides of the steel plate I, and sliding blocks are arranged in the adjusting grooves; according to the device, the U-shaped block is driven to move outwards by externally rotating the pushing bolt, so that the sawtooth pressing block is separated from the sawtooth fixing strip, the distance between the first steel plate and the second steel plate can be adjusted, the side frame drives the sliding block to slide in the adjusting groove in the adjusting process, and it is ensured that the adjusting process is stable and controllable; and after the required size is adjusted, the pushing bolt is internally screwed to complete fixation. The convenient size expansion and contraction design can adapt to the vertebra spacing difference of different patients and the surgical operation space requirement, the surgical limitation caused by the fixed device size is avoided, and the surgical operation flexibility is improved.