600 results about "Kirschner wire" patented technology

The present invention is a minimally invasive surgical method for fusing adjacent vertebrae. A first K-wire is inserted into the spinous process of an upper vertebrae. A second K-wire is inserted into a transverse process of a lower vertebrae. A first fixation block is secured to the first K-wire and a second fixation block is secured to the second K-wire. A rod member extends across the K-wires. A swivel block assembly is secured to achieve a desired angle for a first axis along which a first screw will be implanted into a facet joint. The swivel block assembly is secured at a desired axial position on the rod member. Percutaneous access to the upper vertebrae along the first axis is then obtained via a cannula. A removable screw having a threaded section for implantation across the facet joint and an elongated shank section that is shearable subcutaneously is inserted through the cannula. The threaded section is implanted along the first axis across the facet joint to attach the upper and lower vertebrae. A shearing tool is inserted percutaneously over the shank section and the shank section is sheared off immediately above the lamina.

Devices and methods for registering, dynamically referencing, and navigating an anatomical region of interest of a patient are provided using a tracked Kirschner wire (K-wire), where the K-wire includes a position-indicating element.

An example apparatus places translaminar screws across a facet joint between adjacent first and second vertebrae in a minimally invasive surgical procedure. The apparatus includes a first K-wire, a second K-wire, a first fixation block, a second fixation block, a support block, a first rod member, a second rod member, and a cannula. The first K-wire is inserted into the spinous process of the first vertebrae. The second K-wire is inserted into a transverse process of the second vertebrae. The first fixation block has perpendicularly extending first and second passages. The first K-wire extends into the first passage in the first fixation block. The second fixation block has perpendicularly extending first and second passages. The second K-wire extends into the first passage in the second fixation block. The support block has perpendicularly extending first and second passages. The first K-wire extends into the first passage in the support block. The first rod member extends through the second passage in the first fixation block and the second passage in the second fixation block. The second rod member further secures the first and second fixation blocks to the first and second vertebrae. The second rod member extends through the second passage in the support block. The cannula enables implantation of the translaminar screws across a facet joint between the first and second vertebrae.

A method and system is provided for repairing bone fractures at locations where high levels of stability are required. The system employs two plates to buttress a fracture from both the dorsal and volar sides. The plates are affixed to one another using screws that are installed from a volar plate, through the bone and into a dorsal plate. The method provides for use of a directional guide that allows the precise placement of Kirschner wires for temporary fixation of the fracture, installation of a first bone fixation plate using the installed K-wires for alignment, installation of a second bone plate adjacent the bone to be repaired and opposite the first bone plate, and installation of cannulated fasteners between the two opposing bone plates such that the fasteners rigidly engage both of the bone plates.

A method of performing vertebral facet fusion by lateral approach and related devices. The lateral approach to facet fusion involves identifying the lateral mass and introducing any of the fixation methods known or described herein laterally at one or more facets through the use of a Kirschner wire guide, a cannulated bone drill and cooperatively cannulated staple guide. A surgical bone staple have a perforated bridge is used across the lateral facet joint where fixation is required. Where fusion is desired, a bone screw have lateral perforations of the shank is inserted through the cannulated staple guide and bridge perforation at the joint to promote fusion. A staple cap and graft container for overlay grafting may be utilized for additional fusion. The method involves less surgical time, reduced blood loss and discomfort for the patient as compared to the posterior approach.

A Kirschner wire clamp is used to reliably and simply fix bone plates to a bone surface. The wire clamp consists of a tubular guide member for receiving a Kirschner wire. The guide member has a bore surrounded by a wall and a base for engaging a hole in a bone plate such as a bone screw hole. A spring clamp is mounted adjacent an open end of the tubular guide bore opposite the base which clamps the Kirschner wire to the guide member after the wire has been fixed in bone. The Kirschner wire clamp can be aligned simply and reliably by the guide member, and by the clamping mechanism, can be reliably fixed to the Kirschner wire.

The invention relates to a combined three-dimensional traction mounting bracket for a wrist joint, and the mounting bracket provided by the invention mainly comprises two connecting rods and two arc-shaped rings, wherein the end surfaces, along the arc line direction, of the two arc-shaped rings are both provided with a plurality of through holes; two ends of each connecting rod are respectively locked and connected to the through holes corresponding to the two arc-shaped rings; each arc-shaped ring is provided with two purl screws; the end surfaces, adjacent to bolt parts, of the purl screwsare provided with needle penetrating grooves; the bolts of the purl screws are locked on the arc-shaped rings via nuts; two Kirschner wires are adopted for cooperating and fixing a metacarpal bone neck and a radius in a needle threading mode by virtue of the purl screws; and steel needles are cooperated to fix a wrist joint fracture block locked by the purl screws. The combined three-dimensional traction mounting bracket has the advantages of compact and stable integral structure, low cost and adjustable rigidity, is convenient to use and dismount, assists the fixation of wrist joints and fracture blocks, is free from stripping a periosteum and is favorable for healing wrist joint damages.

The invention provides methods and apparatus for accurately cutting bones with a surgical cutting device, such as a sagittal saw, using a surgical navigation system without use of a complex cutting jig. A surgical navigation system is used to navigate a guide tube to be used to drill a k-wire into the bone. The k-wire will act as a guide to control at least one degree of freedom of a saw blade for making a cut in the bone. In an exemplary high tibial osteotomy procedure, in which two intersecting planar cuts must be made in the tibia in order to remove a wedge of bone, a surgical navigation marker is mounted on the guide tube. The surgeon uses the surgical navigation system to navigate the guide tube to the desired varus-valgus angle and height of the first cut and then drills a k-wire into the tibia at that varus-valgus angle using the guide tube. The process is repeated for the second cut. The surgeon then uses the two k-wires as guides for controlling the varus-valgus angle of a sagittal saw for the two planar cuts. The surgeon rests the saw blade flat on the respective k-wire to define the varus-valgus angle of the cut. The saw itself also is navigated, with the surgical navigation system providing a display showing the surgeon at least (1) the varus-valgus angle, (2) the cut depth, and (3) the anterior-posterior slope. The anterior-posterior slope and the depth of the cut is controlled freehand by the surgeon.

The method and apparatus for external fixation of bone fractures provides for external fixation of bone fractures, especially fractures of the patella and the olecranon. An apparatus for external fixation of bone fractures comprises a support member, and a pair of tensioning assemblies disposed along the support member. A first tensioning assembly is connected to the first end of the support member, and a second tensioning assembly is slidably disposed along the support member. Filaments, attached to and extending between the first and second tensioning assemblies, may be tensioned by moving the second tensioning assembly along the support member away from the first tensioning assembly. Filaments, such as Kirschner wires, are inserted through bone fragments on opposite sides of a fracture. The filaments are tensioned by moving the tensioning assemblies apart. Tension applied to the filaments draws the filaments together, compressing the bone fragments together at the fracture.

The invention relates to a tibia tunnel locating device and method based on a personalized navigation template and belongs to cruciate ligament reconstruction surgery. The method comprises the steps that firstly, CT data and MRI data of a patient are collected, a data model is processed, and three-dimensional reestablishment is conducted on the data model; secondly, according to the three-dimensional model, the position of a tunnel is measured and determined, a bone surface needed by locating is obtained through partition, and a navigation template model is established; thirdly, the navigation template is manufactured through the rapid forming technology; finally, locating and verification are conducted through the navigation template and a locating device of a guider, and then a Kirschner wire is inserted through drilling. According to the tibia tunnel locating device and method based on the personalized navigation template, the navigation template is easy to locate and easy to operate, due to the auxiliary locating calibration of the guider, it is avoided that the error of the Kirschner wire inserted into the inner opening of the tunnel through drilling is amplified due to navigation template catheter small-angle swing deviation caused by soft tissues residues and other factors, the locating precision can be effectively guaranteed, and the surgical effect is more reliable.

The invention relates to a medical instrument, in particular to an axis odontoid screw sighting device for guiding positioning of hollow screws during axis odontoid fracture treatment. The axis odontoid screw sighting device comprises a hollow guide tube and is characterized in that at least two telescopic connection rods are installed on the hollow guide tube, one ends of the telescopic connection rods are provided with sleeves, the hollow tube is inserted in the sleeves, and the other ends of the telescopic connection rods are connected onto a fine control panel which is connected with a supporting rod through a spherical joint. The axis odontoid screw sighting device is simple in structure and convenient to use, and can be used for guiding accurate positioning of kirschner wires during the axis odontoid fracture treatment. Therefore, operation quality is improved, operation errors are reduced, and pain of patients is alleviated.

The invention provides a preparation process of medical Ti-6Al-7Nb alloy wires for manufacturing Kirschner wires. Special class-0 titanium sponge is adopted, honorary alloy composition burdening is performed according to marks, electrodes are pressed for assembly and welding, three-time smelting is performed through a vacuum consumable electro-arc furnace to form fai 370 mm alloy ingots; a metallographic phase method is adopted to measure (alpha+beta)/beta phase transformation points (TB) of the alloy ingots; the alloy ingots are subjected to surface scalping, riser ingot bottoms are cut off, a beta phase zone is heated through an electric furnace, cogging and forging are performed through a 2500-tons oil press, surface defect coping is performed, and further a two-phase zone is heated; two-time rolling is performed to form fai 9.5 mm rod and wire blanks, the rod and wire blanks are heated to be lower than the phase transformation points and are repeatedly subjected to heating and multiple-die drawing to form wires commonly used for Kirschner wires of fai 4.0 mm and under through a 30KW drawing machine and a 11 KW drawing machine, and annealing, straightening, polishing and heat treatment are performed. For the high-strength Ti-6Al-7Nb Kirschner wires serving as a medical material for human, the safety and reliability of the wires are especially important. The work-hardening capacity of the Ti-6Al-7Nb wires is the key of high strength achievement through heat treatment strengthening.

An intramedullary osteosynthetic device includes an intramedullary nail, a hip helical implant, a sliding sleeve, a lateral set screw, and at least one distal locking screw. The intramedullary nail is cannulated. The cannulation is at least partially threaded to receive a coaxial set screw. The intramedullary nail includes at least one oblique slotted bore in communication with the cannulation, where the at least oblique slotted bore receives a sliding sleeve, and further includes a threaded notch compatible with the lateral set screw. The hip helical implant includes a frontal helical portion having a truncated conical shape, at least two helical twisted blades attached to the frontal helical portion, and a rear smooth shaft, the shaft having an external flat surface. Each blade of the hip helical implant has a hole for receiving a peg from a step helix fixating the hip helical implant to the step helix. The hip helical implant is cannulated to receive a Kirschner wire during insertion of the implant into a femoral head. The sliding sleeve includes a tube having an internal flat corresponding to the external flat of the hip helical implant and has external threads at the rear of the sleeve engaging the lateral set screw. The coaxial set screw fixes the sliding sleeve to the intramedullary nail by tightening the sliding sleeve inside the oblique bore.

The invention discloses a self-adjusting orthopedic external fixator which comprises at least two fixing rings, a knighthead, an adjusting nuts positioned on the knighthead and used for fixing and adjusting the distance between the two retainers, a Kirschner wire, a thread needle fixture and a pressure sensor positioned on the knighthead as well as a driving system and a PLC automatic control system which are corresponding to the adjusting nuts; wherein, the driving system adopts a ratchet, a ratchet rod and a gear structure. The self-adjusting orthopedic external fixator of the invention controls and adjusts the relative position between the two retainers automatically, avoids errors caused by manual manipulation, ensures that all knightheads are uniformly forced and avoids deviation caused by disequilibrium of the knightheads; besides, the self-adjusting orthopedic external fixator has convenient operation, thus ensuring that the processes of fracture healing and bone lengthening are operated smoothly to improve efficiency and success rate of operation and alleviate the suffering of the sufferer.

The invention discloses a spinal motion segment in-vivo loading device, which relates to the technical field of medical equipment, and comprises a first loading plate, a second loading plate, a sliding mechanism and a driving device, the first loading plate is provided with a first mounting seat for mounting a kirschner wire, the second loading plate is provided with a second mounting seat for mounting the kirschner wire, the first loading plate and the second loading plate are slidably connected through a sliding mechanism, and the driving device is used for driving the first loading plate and the second loading plate to be close to each other. During use, the kirschner wire on the first mounting seat penetrates through the upper section of the spine, the kirschner wire on the second mounting seat penetrates through the lower section of the spine, the first mounting seat and the second mounting seat are driven by the driving device to get close to each other, and axial loading can be performed on the spine; and therefore, a researcher can complete the research on the specific relation between the mechanical load and the iliac bone mass, the structure and the mechanical property.

The invention discloses an automatic traction device for a lower-limb fracture setting operation. According to the invention, a supporting frame is of a triangular structure, is used for supporting alower limb of a patient to form and keep a leg bending state, and comprises a horizontally-arranged supporting bottom surface, and a thigh bearing surface and a shank bearing face which are oppositelyarranged two ends of the supporting bottom surface, wherein the end parts of every two adjacent surfaces are hinged; and the lengths of all the surfaces can be adjusted and locked through edge adjusting mechanisms. A tibia kirschner wire mounting position is provided with two tibia kirschner wire mounting structures which are respectively arranged at two sides of the shank supporting surface. Twothighbone kirschner wire mounting positions are arranged in parallel at an interval, and each thighbone kirschner wire mounting position is provided with two thighbone kirschner wire mounting structures which are respectively arranged at two sides of the thigh supporting surface.

A cruciate ligament rebuilding hollow trephine belongs to medical apparatuses and instruments. A bone residue removing rod is arranged in an axial center hole of the trephine in an insertion mode, and the bone residue removing rod and the trephine are positioned as a whole through the fastening matching of a fastening screw mounted on the bone residue removing rod with an axial sliding hole on the side wall of the trephine. A piston is mounted at the front end of the bone residue removing rod in the axial center hole of the trephine. Sawteeth of the trephine are arranged on the front side end surface of the trephine. Kirschner wires are inserted into the bone residue removing rod, the piston and the axial center hole of the trephine sequentially, and the outer surfaces of the Kirschner wires match with the inner surfaces of the bone residue removing rod, the piston and the axial center hole in a contact mode, so that the Kirschner wires can be positioned radially. The cruciate ligament rebuilding hollow trephine is simple in structure, high-quality and effective in bone-side tunnel establishment and simple in postoperation bone residues removing.

The invention belongs to medical equipment, and particularly discloses a universal locking and pressurizing bone plate. The universal locking and pressurizing bone plate is characterized in that a plurality of universal locking holes are formed in the head part of the bone plate; both the head part and the rod part of the bone plate are provided with a plurality of Kirschner wire holes; and the tail part of the bone plate is provided with combination holes formed by partly overlapping pressurizing hole slots and the locking holes. The universal locking holes of the universal locking and pressurizing bone plate allow locking screws to be set at certain angles in all directions away from the axis and the angles are 0 to 15 degrees. The universal locking and pressurizing bone plate disclosed by the invention can select an angle in the range of plus and minus 15 degrees or a preset fixed angle by a tool during operation so as to conveniently select a fixing method according to a fracture fragment. Meanwhile, the Kirschner wire holes are used for temporary fixation of the bone plate, so that the stability of a product is improved so as to ensure the success of operations and reduce pain of patients. The universal locking and pressurizing bone plate has a reasonable structure, is simple to manufacture and flexible to use, has an ideal effect and the advantages of large embedded direction selection range and good locking effect.