11 results about "Articular processes" patented technology

This invention relates to a novel P-approach endoscopic lumbar fusion surgery method, belonging to the field of lumbar fusion surgery technology. This method addresses the high risk of nerve injury and insufficient operational precision in existing endoscopic fusion techniques by proposing an improved solution. It utilizes Kirschner wires for positioning at the inferior articular process to establish a precise entry point avoiding the nerve root pathway; a visually guided circular saw is used throughout the endoscopic procedure to construct a safe triangular working channel directly reaching the spinal canal; under full endoscopic monitoring, a unilateral approach is used for bilateral spinal canal decompression, thoroughly removing diseased tissue and scraping the endplates until punctate bleeding occurs; a bone graft cannula with a curved tip is used to precisely implant the fusion device into the anterior region of the intervertebral space, restoring intervertebral height through a self-locking structure; finally, a universal pedicle screw is percutaneously implanted for fixation. This method reduces the risk of nerve injury, improves surgical safety and efficiency, and is suitable for patients with lumbar spondylolisthesis complicated by spinal stenosis.

The invention relates to a method, system and spine processing device, for loosening meat from a spine portion of a split carcass part of a four-legged slaughter animal, comprising a positioning device for positioning the carcass part; a cutting device for loosening the meat, by cutting, from spinous process parts and from articular processes, the cutting device comprising a first cutter for cutting along the spinous process parts; a second cutter for cutting along an outer side of the articular processes; a third cutter for cutting along an upper side of the articular processes. The second cutter is movable transverse to the cutting direction, relative to the first cutter. The cutting device has an urging element for urging the second cutter towards the first cutter in the transverse direction while cutting, such that the second cutter cuts along the outer side of the articular processes.

The utility model relates to a tool assembly for injecting bone cement, which is characterized in that an outer tube extends into a zygapophysis along the length direction of a vertebral pedicle, an inner tube with bone cement in a second channel extends into a first channel of the outer tube and extends to a part, needing to be injected with the bone cement, of the zygapophysis, a push rod extends into the second channel, and the push rod is pushed, so that the bone cement is injected into the zygapophysis. And the push rod pushes the bone cement in the second channel, so that the bone cement flows out along the liquid outlet hole. And under the action of the push rod, the bone cement flows out along the forming direction of the liquid outlet hole. One part of the bone cement permeates in the length direction perpendicular to the vertebral pedicle, and the other part of the bone cement permeates in the forming direction of the liquid outlet holes, so that the bone cement in the second channel permeates and disperses in the articular process in the forming direction of the liquid outlet holes; therefore, the bone cement from the vertebral body to the vertebral pedicle and finally to the articular process forms a three-in-one structure, so that the stability of the bone cement is enhanced.

The utility model relates to medical auxiliary instrument especially adjustable intervertebral foramen forming stabilizing device, including horizontal pole, rotating component, support rod, lower hanging rod, angle adjusting assembly and sleeve etc. The utility model is provided with support rod, horizontal pole, lower hanging rod, rotating component and angle adjusting assembly, is fixed through a plurality of bolts, need not doctor manual fixed ring saw to be able to stably, safely, effectively and grind off upper articular process ventral side, thereby good realization intervertebral foramen forming, through height adjustment and multi -angle adjustment, can adjust the position and angle of sleeve according to patient demand and operation requirement, improve the applicability of this stabilizing device.

The utility model discloses a kind of pulling distraction devices for lumbar UBE operation, it is related to medical instrument technical field, including left forceps body and right forceps body. One end of left forceps body is equipped with in-vivo extension piece, in-vivo extension piece is connected with placement part, and placement part is equipped with bone surface embedding body;Right forceps body is rotatably connected with left forceps body and can be relatively fixed, one end of right forceps body is equipped with pulling part, and pulling part is connected with distraction extension body. Among them, bone surface embedding body is located at the side of placement part away from right forceps body, and distraction extension body is set to the side away from left forceps body. The above-mentioned pulling distraction device for lumbar UBE operation, the fixed part of left forceps body is used to place in the upper vertebral plate and articular process joint medial bone surface polished by abrasive drill, and is embedded into bone surface by bone surface embedding body, and the distraction extension body of right forceps body is used to extend into ventral running nerve root, and the nerve root and dural sac can be appropriately pulled apart by the pulling part of right forceps body, expose operation visual field, without the help of assistant.

The invention relates to the technical field of medical zygopophyseal joint fusion devices, and discloses a novel zygopophyseal joint elastic fixing device which comprises a W-shaped connecting piece and a screw assembly, the W-shaped connecting piece is of a symmetrical wavy structure and comprises three vertexes and two grooves, transition areas between the vertexes and the grooves are connected through arcs, and the screw assembly is connected with the W-shaped connecting piece. A through hole channel is formed in the W-shaped connecting piece, the screw assembly can penetrate through the through hole channel to fix the W-shaped connecting piece, the W-shaped connecting piece is made of polyether-ether-ketone materials, and the screw assembly is made of medical-grade titanium alloy. The W-shaped connecting piece is made of a polyether-ether-ketone material, the elasticity modulus of the W-shaped connecting piece is close to that of a skeleton, the lumbar vertebra is allowed to elastically move within the range of + / -3 degrees to + / -5 degrees through the symmetrical wavy structural design, the problem that the articular process joint activity capacity is lost due to a traditional rigid fusion cage is solved, and natural mechanical transmission of the spine is maintained; and the degeneration risk caused by stress concentration of adjacent sections is effectively reduced.

The invention discloses a minimally invasive ultrasonic guided percutaneous rabbit intervertebral disc degeneration modeling mode, and relates to the technical field of ultrasonic modeling, and the method comprises the following steps: fixing an experimental rabbit on an operation table in a prostrate manner in an anesthetic state, and raising the abdomen to maintain lumbar lordosis; an ultrasonic probe is used for scanning along the longitudinal axis of the spine, and the L5 transverse process is recognized upwards from the highest point of the crista iliaca; positioning an L5 / 6 intervertebral disc gap in the cross section ultrasonic image by taking the identified L5 transverse process as an anatomical reference; a stable high-echo target spot formed by fascia is confirmed in the intersection area of the L5 transverse process head side and the superior articular process ventral side; marking a puncture needle insertion position on the skin surface according to the high-echo target spot; percutaneous puncture is conducted under ultrasonic real-time guidance along the marked position, the needle tip slides into the L5 / 6 intervertebral disc along the superior zygopophysis bone surface, and it is confirmed that the needle tip is located in the nucleus pulposus through viscous resistance and the unlocking hand feeling; the needle tip is controlled to stay in the intervertebral disc for 10 seconds, the puncture depth is kept at 5 mm, and mechanical disturbance is completed to induce the intervertebral disc to retreat.

The application discloses a spine lamina decompression surgery positioning method based on point cloud feature extraction, comprising the following steps: obtaining the 3D point cloud of the open back of a person to be positioned; converting the 3D point cloud into a correction coordinate system to complete posture correction; performing feature segmentation on the corrected 3D point cloud to separate it into two blocks containing target regions; for each block, small batch sampling and interpolation mapping are used to obtain the position of the articular process; and based on the position of the articular process, the spine lamina decompression surgery positioning result of the person to be positioned is obtained. The spine surgery area and the surrounding surface contour three-dimensional model are obtained through a 3D structured light camera, then the target position of the surgery is directly identified and positioned in the three-dimensional model, and the method has the advantages of no radiation, high speed, low cost and the like, and solves the problem that the current spine robot surgery must be implanted with a mark and multiple CTs are performed to position.

The present application belongs to the technical field of medical devices, and provides a guide assembly for a superior articular process approach of a lumbar vertebra and an operation method thereof. The guide assembly comprises a guide rail, a guide needle, a bone removal assembly and a working assembly. The guide rail is provided with a guide track. The guide needle is slidably arranged in the guide rail and is used to establish an initial positioning path to the intervertebral space. The initial positioning path is parallel to the guide track. The guide rail is adapted to move along the initial positioning path. The bone removal assembly is detachably connected to the guide rail to remove bone mass of the superior articular process approach and form a bone window. The working assembly comprises a working sleeve which is adapted to be connected to the guide rail to form a working channel after the bone removal assembly is removed. The guide needle establishes the initial positioning path to the intervertebral space to confirm the position of the guide rail, reduces the number of repeated verification and adjustment under fluoroscopy, and thus reduces the radiation exposure dose of the patient. The bone removal assembly and the working assembly connected to the guide rail can be performed according to the guide track, and the possibility of path loss is reduced.

The application relates to a guide for placing a spinous process lamina articular process screw, which comprises a second arc-shaped rod, a first arc-shaped rod, a first positioning rod, an auxiliary rod and a sighting rod, a first connecting block is connected to the first arc-shaped rod, a second connecting block is slidably connected with the second arc-shaped rod, a third connecting block is slidably connected with the second arc-shaped rod, a fourth connecting block is slidably connected with the first arc-shaped rod, the end of the sighting rod towards the inner side of the second arc-shaped rod can intersect with the end of the auxiliary rod towards the inner side of the second arc-shaped rod at point a, the point a is the center of the second arc-shaped rod, the extension line of the central axis of the sighting rod intersects with the end of the first positioning rod towards the inner side of the second arc-shaped rod at point b, and the point b is the center of the first arc-shaped rod. The guide for placing the spinous process lamina articular process screw can accurately determine the piercing direction of the spinous process lamina articular process screw, the guide is not easy to swing during the operation process, the operation precision is high, the guide is easy to use for clinical doctors with insufficient experience, and the guide has extremely high clinical application value.