118 results about "Vertebral canal" patented technology

An implant for expanding a spinal canal having an upper portion, a lower portion, and an inner member. The inner member communicates with a swivelable coupling located at each end of the inner member within the implant. Each swivelable coupling also interacts with a respective one of the upper and lower portion, within an inner bore thereof. Accordingly, movement of the inner member relative to one or both of the upper and the lower portions, via one or both swivelable couplings, translates the upper portion away from the lower portion, about a vertebral cut, to widen the vertebral cut and expand the spinal canal. The swivelable action of the couplings during translation allows angulation of the inner member, relative to a longitudinal axis of the implant, to accommodate a natural lateral shift occurring during a widening of a vertebral cut.

A method of neurosurgical treatment of infantile cerebral palsy wherein laminectomy is performed for providing access to the vertebral canal and its contents. The laminectomy is carried out in the cervical portion of the spine and the removal of at least three vertebral arches is effected.

The invention discloses an external thoracolumbar vertebra distraction repositor which comprises a fixed support, two hollow screws, a distracter, a pressurizer and a T-shaped socket spanner; the fixed support comprises a beam and two sets of clamps; the distracter comprises a body and two distraction rods, and one end of the distraction rod is provided with a C-shaped foot hook which is vertical to the distraction rod; the pressurizer comprises a thread rod, a connector and an extension rod; the connector comprises a nut which is connected with the thread rod and a lantern ring which is sleeved on the extension rod, and the lantern ring and the extension rod as well as the lantern ring and the nut are respectively connected with each other rotatably in two intersected planes. The distraction repository can spread the vertebral body to the maximum height according to the practical conditions, and through utilizing the self restrictive tensile forces of the anterior and the posterior longitudinal ligaments of the vertebral body, the vertebral body can be effectively corrected to be backwards protruded for an angle of 2-8 degrees; and moreover, the heights of the anterior, the center and the posteriors can also be effectively reposed. In addition, the distraction repository is also suitable for spreading, restoring and reposing the burst fractures without symptoms of stressed spinal cord and neurological deficit when vertebral body paries posterior fracture is burst in the spinal canal.

A spinal covering device for covering exposed neural spinal elements after a spinal procedure includes a body at least substantially or completely free of openings and first and second support planes extending longitudinally along the body adapted to overlay or abut remaining tissues on opposite sides of the exposed neural spinal elements such that the device forms a spinal canal portion protecting the neural spinal elements. The device has an inner surface at least partially defining an inner surface of the spinal canal portion and an outer surface opposite of the inner surface, at least the outer surface allowing bone graft deposition or bone fusion thereon.

The invention relates to devices, implants, systems, techniques and methods for addressing certain conditions of the spine, including devices, implants, systems and methods for performing spinal laminoplasty or other expansion of the spinal canal. The devices of the invention are expandable in situ, providing greater versatility for surgeons performing various procedures where expansion of the spinal canal is desired.

The invention discloses a universal omni-posterior-double lateral mass bridging board for cervical vertebra. The bridging board is in an arched whole made of a narrow and long metal plate, and comprises two lateral mass fixing plates, two vertebral lamina fixing plates, a spinous platform fixing plate and a bone grafting fixing plate. The bridging board is mainly used for reconstructing a vertebral canal structure after posterior expansive laminoplasty of cervical spine, can simultaneously fulfill fixation of open door side and hinge side in the expansive laminoplasty, the length of each fixing plate and angles among the fixing plates are in accordance with the characteristics of human cervical vertebra dissection; the bridging board has strong biological attachment and can furthest resist posterior pressure, so that the expansive laminoplasty failure caused by crack reclosing at the vertebral open door side and hinge fracture is avoided; the whole structure adapts to the posterior anatomy structure of human cervical vertebra and the characteristics of biological mechanics; and the bridging board can be pre-bent properly in use. The universal omni-posterior-double lateral mass bridging board for cervical vertebra is expected to replace the conventional posterior cervical single open door fixing plate to become a clinical standard postoperative physiology and stability reconstructing method after the posterior cervical single open door expansive laminoplasty.

The present invention is a three dimensional Cartesian coordinate system for the human body, having three perpendicular and intersecting planes. The present invention is based upon the use of the three cardinal planes, in the universally recognized orientations. The cardinal planes in accordance with the present invention are: Sagittal: midsagittal plane, Transverse: upper-most extent of the iliac crests, and Coronal: anterior-most aspect of the vertebral canal. The point at which these planes intersect defines the 0,0,0 location in the human body.

A bone fracture plate formed by a vertebral plate comprises a reticular frame for holding a bone grafting material. The reticular frame comprises a bottom surface facing to the inner cavity of a vertebral canal, an upper side face and a lower side face. The top surface of the reticular frame is used for implanting and tamping the opening of the bone grafting material. The inner side face of the reticular frame is provided with an inner opening used for the connection of the broken ends of the vertebral plate and the bone grafting material inside the reticular frame. The outer side face of the reticular frame is provided with an outer opening used for the connection of the broken ends of a lateral mass of a cervical vertebra and the bone grafting material inside the reticular frame. The inner side on the top surface of the reticular frame is provided with a first mounting plate fixedly connected with the broken ends of the vertebral plate and the outer side on the top surface of the reticular frame is provided with a second mounting plate fixedly connected with the broken ends of the lateral mass. The invention has the advantages that the invention is capable of effectively and adequately grafting bone, preventing grafted bone piece from falling into the vertebral canal after surgery, and also preventing a callus from proliferating and protruding towards the vertebral canal.

The invention discloses a device for operating vertebroplasty through a unilateral vertebral pedicle. The device for operating the vertebroplasty through the unilateral vertebral pedicle comprises a guide sleeve which can steer, a universal micro drill and a bone cement injection channel which can steer. The device for operating the vertebroplasty through the unilateral vertebral pedicle has the advantages that operation and mastering are simple, and acceptability among doctors is good; the portion of saccule opening and the portion of bone cement injection are made to be arranged on the front two thirds of the central portion of the centrum, and therefore the ill vertebral is supported firmly and stably; compared with the prior art, the injection portion of the bone cement is closer to the center of the centrum but is far away from the edge of the centrum, and therefore the probability of leakage of the bone cement is reduced. Meanwhile, due to unilateral puncture, the risk that the puncturing channel enters the vertebral canal is reduced, and the risk of the leakage of the bone cement from the vertebral canal is reduced; the entering path of operation is changed from two sides to one side, the time of the operation is obviously shortened, injure to a patient is reduced and radial exposure of the patient and medical staff can be obviously reduced; the injection point of the bone cement in bones is expanded from one point to multiple points so that the bone cement is enabled to disperse more evenly in sclerotin; the using range is wide and completely identical to that of an existing vertebraoplasty technology.

The present invention relates to a preventive and/or therapeutic agent for spinal canal stenosis comprising aldose reductase inhibitory compounds. A representative example of aldose reductase inhibitory compounds is the compound represented by formula (I):

wherein all the symbols represent the same meaning as described in the specification; a salt of its acid when R^3a represents hydrogen, or solvate thereof The therapeutic agent of the present invention is effective for prevention and/or therapy for spinal canal stenosis and the like, such as lumbar spinal canal stenosis.

The invention relates to an expanding instrument for the space between lumbar spinous processes. The expanding instrument can effectively expand the space between the lumbar spinous processes and enlarge the inter-vertebral space of the lumbar, and meanwhile the spinous processes can be effectively prevented from disengaging from the expanding instrument. An expander body is formed by connecting two expanding rods through a rotating shaft. The front ends of the expanding rods are bent in an arc shape and connected with the respective expanding mouths. The expanding mouths can adapt to the spinous processes with different thicknesses, and screw holes of different lengths are formed in the upper ends of the expanding mouths. As screws are screwed in for temporary fixation according to the height of the spinous processes of a patient, the situation that the spinous processes disengage from the expanding mouths during treatment of the inter-vertebral space, so that an expander sinks and oppresses the dural sac can be prevented. The middle of the expanding rods is provided with a parallel expander composed of sliding chutes and an X-shaped component with sliding wheels. The rears of the expanding rods are provided with gripping handles, and locking devices at the tail ends of the gripping handles are connected through a threaded rod and a locking nut. The expanding instrument for the space between the lumbar spinous processes is simple in operation, convenient to use, capable of expanding the inter-vertebral space of the lumbar safely and reliably and beneficial to exposure of a surgical field; in addition, surgery time is shortened, the problem of lack of safe special expanding tools for the space between the lumbar spinous processes in existing orthopaedic instruments is solved, and the expanding instrument can be widely used for lumbar posterior vertebral canal decompression surgeries.

To provide a method with which expansion of the vertebral canal of vertebrae is possible with less stress for the patient than with the surgical methods used to date, it is proposed that herein the vertebral arch be split and an incision gap thereby be formed, and the incision gap bounded by opposed incision surfaces be expanded to a prescribed gap width and the bone substance of the resulting vertebral arch sections thereby be elastically/plastically deformed.

The invention relates to a cervical intervertebral fusion device, which comprises a support body and a stretching slider. There is a bone graft inner cavity in the support body, and a bone graft window is provided on the left and right sides of the support body. The cavities are connected; the spreader slider is set in the bone graft inner cavity; there are two spreader sliders, and the two spreader sliders can slide towards a bone graft window in one direction respectively; a baffle is provided behind the bone graft window; An X-ray opaque developing mark is provided on the end surface of the stretching slider facing the bone graft window. In the present invention, the sliding block can be stretched to make the bone graft material and the hook vertebra joint tightly combined, thereby effectively improving the intervertebral fusion effect; the support body also has a bone graft channel through the upper and lower sides, which can be provided on the upper and lower end plates and on both sides Bone grafting is carried out between the hook vertebral joints, so that the surrounding bone grafting is performed in the surgical gap, which increases the contact area between the bone grafting material and the bone grafting bed, and further enhances the effect of intervertebral fusion; the baffle behind the bone grafting window can prevent The bone graft material enters the spinal canal, reducing the risk of surgery.

The invention relates to a medical apparatus, in particular to a subdural tap needle used for intravertebral anesthesia, which consists of an external needle and a needle core. The external needle consists of a tubular first needle body and a first needle bar, wherein, the intersection point of the opening of a first needle tip and the middle axis of the first needle body is in the inner of the opening. A second needle tip shapes in cone and the tip end of the second needle tip passes through the opening of the first needle tip. The outer wall of the second needle tip is tightly matched with the inner of the external needle opening. The first needle body is provided with a fixed facility which can control the inserting depth so as to avoid puncturing dura mater accidentally. The needle tip of the subdural tap needle can separate tissue and muscle fibre bluntly. The wound is small and easy to heal; the spinal puncture needle can not be bent and the success rate of the spinal puncture can be increased. Because of small friction, the mental fragments are not easily produced, which avoids the hidden trouble caused by the residues of mental fragments left in the body of a patient.

The invention provides an auxiliary tool for adjusting a puncture posture in a vertebral canal. The tool comprises a rectangular framework, wherein the rear end of the rectangular framework is movablyconnected with a thigh fixing part, the middle end of the rectangular framework is fixedly connected with a handheld part, and the front end of the rectangular framework is fixedly connected with a head placing part. The thigh fixing part comprises a long rod and a retractable rod which are connected with each other; the long rod is also fixedly connected with an elastic hook-and-loop fastener band for the legs; the handheld part comprises a handle, and the handle is provided with granular bulges and fixedly connected with an elastic layer; the elastic layer is detachably connected with a sweat absorption layer; one surface of the head placing part is fixedly connected with a soft cushion, and the other surface of the head placing part is fixedly connected with a hook-and-loop fastener band for the neck. The auxiliary tool for adjusting the puncture posture in the vertebral canal is simple in structure and convenient to use and can replace the manual work of medical personnel to limitthe body posture of a patient, and meanwhile, the nervous emotion of the patient can be alleviated.

The invention relates to a human body vertebral column implanting appliance, in particular to an artificial vertebral plate, which comprises a vertebral plate body. The artificial vertebral plate is characterized in that the vertebral plate body is an arc-shaped netty vertebral plate, side wings are arranged on two sides of the arc-shaped netty vertebral plate, screw holes are arranged on the side wings, netty bumps are arranged on the back side of the arc-shaped netty vertebral plate, and meshes are arranged on the arc-shaped netty vertebral plate and the netty bumps. The invention is used for reconstruction by the aid of the artificial vertebral plate after laminectomy in posterior spinal surgery for a human body, coloboma of a vertebral plate is repaired, the human body vertebral plate is imitated, spinal cord compression caused by swelling of posterior tissues of the spinal cord of the human body after the surgery is prevented, completeness of a vertebral canal is kept, the vertebral column of the human body is stabilized, and the spinal cord is protected. During usage, the artificial vertebral plate is fixed on a transverse process or a vertebral pedicle of the vertebral column of the human body by screws via the screw holes on the side wings on the two sides, and paraspinal muscle, supraspinal ligament and the like are sewn on the meshes of the netty bumps. The vertebral plate body is the arc-shaped netty structure, so that the volume of the vertebral canal is guaranteed; and the netty structures of the arc-shaped netty vertebral plate and the netty bumps bring convenience for growth of tissues on two sides so as to realize tissue connection.

The invention discloses a vertebral arch pedicle extension device, which comprises a front nail, a core bar, a rear nail and a fixer. The core bar has a hollow structure, wherein the middle part of the core bar is provided with a through hole, the front end of the core bar is connected with the front nail by screw thread, the rear end of the core bar is sleeved with the rear nail, and the core bar is glidingly connected with the rear nail; the fixer is fixedly connected at the rear end of the rear nail and enables the core bar and the rear nail to be fixed oppositely. The vertebral arch pedicle extension device can separate a centrum from a vertebral arch pedicle and extend the distance therebetween, finally achieve the aims of expanding a vertebral canal and an intervertebral foramina and reducing pressure, can be applied to surgical operation on stenosis of the lumbar spine and has good application prospect.