118 results about "Vertebral canal" patented technology

A device and method for biologic vertebral reconstruction utilizes a biologically active jacket inserted into a cavity formed in a vertebra to be reconstructed. An artificial bone material is inserted into the biologically active jacket and allowed to set. The structure and method described herein provide for effective biologic vertebral reconstruction. The use of a biological material and artificial bone enables the host bone to replace the artificial bone over a period of time. Additionally, the structure of the biologically active jacket minimizes any impact into the spinal canal and the paravertebral spaces. Moreover, because of its biomechanical characteristics, which approximate the host bone, there is relative protection of the neighboring vertebral against fracture. Still further, the materials of the biologically active jacket may be impregnated with various substances to achieve various advantageous tasks.

A spinal clip for creating a potential space within the spinal canal and thus stabilizing the spine without the need for additional spinal components is embodied in different forms. The spinal clips are configured to provide a clamping or holding force against and / or to the spinous processes, transverse processes and / or the lamina of adjacent vertebrae. In one form, the spinous process clips utilize pivoting to effect clamping or holding. In another form, the spinous process clips utilize rotation to effect clamping or holding. Such rotation may be between clamping or holding members or via a screw system. In yet another form, the spinous process clips utilize ratcheting to effect clamping or holding. In a still further form, the spinous process clips utilize expansion to effect clamping or holding. Depending on the form of clamping or holding, the spinous process clips can provide infinite adjustment of the clamping or holding force within an adjustment range, or provide discrete steps or levels of the clamping or holding force.

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 catheter apparatus includes a hollow needle having an open, sharpened tip at its distal end. A cannula is telescopically disposed within the needle. The cannula has a closed, blunt tip at its distal end, a hollow lumen, and an open proximal end. The cannula is made of a flexible metal material and has an insulating material covering except at its distal portion defining the distal end. A metallic wire capable of transmitting radio frequency (RF) energy is telescopically disposed within the cannula. The cannula lumen has a seating surface for accommodating the distal end of the wire. The cannula distal end is capable of extending beyond the needle so that the blunt tip may be seated in a critical treatment region in a patient's spinal canal without damaging any nerves. A method of treating a patient's pain includes a step of inserting the catheter apparatus into a critical treatment region in the spinal canal of the patient. Once the needle is located near the treatment region, the cannula is advanced until the blunt tip extends beyond the needle's distal end. RF energy is then transmitted through the wire, the cannula's blunt tip, and to the treatment region.

Methods and devices are provided for replacing a spinal disc. In an exemplary embodiment, artificial disc replacements and methods are provided wherein at least a portion of a disc replacement can be implanted using a posterolateral approach. With a posterolateral approach, the spine is accessed more from the side of the spinal canal through an incision formed in the patient's back. A pathway is created from the incision to the disc space between adjacent vertebrae. Portions of the posterolateral annulus, and posterior lip of the vertebral body may be removed to access the disc space, leaving the remaining annulus and the anterior and posterior longitudinal ligaments in tact. The disc implant can be at least partially introduced using a posterolateral approach, yet it has a size that is sufficient to restore height to the adjacent vertebrae, and that is sufficient to maximize contact with the endplates of the adjacent vertebrae.

An in-situ formed laminoplasty implant comprising an expandable bag containing a flowable, hardenable composition, wherein the implant may be shaped to act as a laminoplasty strut and be rigidly connected to a prepared lamina space.

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 present invention relates to a thoracolumbar vertebrae posterior false body which comprises a manual spinous process and a manual vertebral lamina. The manual spinous process is connected with the manual vertebral lamina, and the connection is shape as the connection of the spinous prcess and the vertebral lamina of human body pyramid. Compared with the prior art, the thoracolumbar vertebrae posterior false body can reconstruct the stability of thoracolumbar vertebrae and recover the physical structure and the physical function of thoracolumbar vertebrae posterior column, and can reconstruct the normal anatomical configuration and the function of vertebral canal, and can effectively avoid the possibility of the iatrogenic injury caused by vertebral canal content during operation; the thoracolumbar vertebrae posterior false body integrates spine fusion and non-fusion fixation functions as a whole, the fusion and non-fusion fixation functions are selected and used freely according to the requirement of the operation, and the operation is simple.

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 R3a 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 vertebra interbody fusion cage which comprises a supporting body and distraction sliders. A bone grafting inner cavity is formed in the supporting body. The left side and the right side of the supporting body are each provided with a bone grafting window which is communicated with the bone grafting inner cavity. The distraction sliders are arranged in the bone grafting inner cavity. The two distraction sliders can slide to the bone grafting windows in one direction respectively. Baffles are arranged behind the bone grafting windows. The end faces, facing thebone grafting windows, of the distraction sliders are provided with developing marks where X-rays can not permeate. By means of the distraction sliders in the fusion cage, a bone grafting material and uncovertebral joints can be closely combined, and the interbody fusion effect is effectively improved; a bone grafting channel which is vertically through is formed in the supporting body, bone grafting can be conducted between upper and lower end plates and the uncovertebral joints on the two sides, surrounding type bone grafting is conducted on a surgery break, the contact area of the bone grafting material and a bone grafting bed is increased, and the interbody fusion effect is further enhanced; the baffles are arranged behind the bone grafting windows, the bone grafting material can be prevented from entering vertebral canal, and surgical risks are reduced.

The invention provides a posterior cervical single-door bone plate which comprises a body, a first end, a second end and a middle portion. The middle portion is connected with the first end and the second end, the first end and the second end are respectively provided with a through hole used for installing a fixing element, and the middle portion is provided with a long through hole used for containing a screw in the length direction. By means of the posterior cervical single-door bone plate, an open vertebral plate in laminoplasty can be fixed and is prevented from being closed again. The posterior cervical single-door bone plate is simple in structure and convenient and quick to operate.

To shield the spinal cord from an external compression, a barrier device having a self-expanding frame and covered with a non-porous elastomeric sheet is routed through either the subarachnoid or intradural space to the site of the compression through the lumen of a delivery catheter that is percutaneously inserted using an introducer needle. When the distal end of the delivery catheter is proximate the site of the compression, the barrier device is pushed out the distal end of the catheter and allowed to self-expand so as to be interposed between the compression and the spinal cord to prevent impingement.

The invention discloses a multi-target vertebral canal spinal needle and a use method thereof. The multi-target vertebral canal spinal needle consists of an outer tube needle and an inner tube needle which are in movable fit with each other, wherein the needle head of the outer tube needle is a spoon-shaped needle head; the back end of the outer tube needle is provided with a handle support and a faucet which is matched with the inner tube needle; the surface of the outer tube needle is provided with graduations; the needle head of the inner tube needle is an inclined-surface-shaped needle head; the side face of the inclined-surface-shaped needle head is provided with an outlet hole; the back end of the inner tube needle is a hand holding handle; the front end of the hand holding handle is provided with a nipple which is matched with the faucet of the outer tube needle; the back end of the hand holding handle is provided with a faucet which is matched with the head part of a microsyringe; and the inner tube needle is longer than the outer tube needle. During use of the multi-target vertebral canal spinal needle, cell leakage can be avoided, and cell resources are saved; multi-target injection can be performed by inserting the outer tube needle at one time, so that repeated insertion into different positions is avoided; the microsyringe is used for injecting, so that the dosage is accurate; and moreover, the multi-target vertebral canal spinal needle has biopsy and brain pressure measuring functions.

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 relates to medical treatment technology, which in detail relates to form memory fixer used for neural canal decompression shaping operation for axial skeleton. It is made from nickel tantalum form memory alloy, comprises rectangular metal plate (1) and hook solid jaw (2), the middle section of rectangular metal plate is arch curve, that is extension part (1.1), the two sides are mounting plate (1.3), solid jaw is installed in lower part of interface between extension part and mounting plate, and forms tiger fixing part with mounting plate to clutch and fix residual end in two sides of vertebral plate. Softening nickel-titanium alloy at 0-4 Deg. C, bending its extension part, opening fixing part, putting residual end of vertebral plate in the tiger's jaw, heating to set temperature to make fixer become original shape, the fixing part clutch and fix said residual end and open vertebral plate through extension, and the decompression and shaping of neural canal are realized. The invention is characterized by simple operation, good safety and wide application for various neural canal shaping operation.

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 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.