35 results about "Femoral nail" patented technology

A variety of options for for fracture fixation after total hip arthroplasty or total knee arthroplasty. The ability to pre-engineer fracture fixation contingent solutions into femoral or tibial components provides a distinct clinical advantage in the planning and execution for periprosthetic fracture fixation. Methods and apparatus include targeting devices allowing for intimate association of fixed angle locking screws in pre-drilled holes in an existing prosthetic, femoral nail, or other components including additional fixation components. Such apparatus and methods further include alignment devices and other components to allow for ease of repair of periprosthetic fractures utilizing the pre-engineered solutions.

A device for bone fixation comprises a bone fixation nail extending from a proximal end to a distal end, the distal end having a helical structure configured to engage a bone, the proximal end having an opening extending thereinto and a first sleeve configured for insertion over a proximal portion of the bone fixation nail and through an intramedullary nail hole, the first sleeve permitting the bone fixation nail to move axially therewithin within a predetermined range of movement along with a locking screw configured to limit movement of the bone fixation nail relative to the first sleeve, the locking screw configured to lockingly engage the opening in the bone fixation nail and having a head and a threaded shaft extending distally therefrom.

The invention discloses an auxiliary device used in PFNA (proximal femoral nail anti-rotation) internal fixation surgery and relates to the technical field of minimally invasive orthopaedic surgery instruments so as to solve the problems that an existing implantation instrument can not position the PFNA entry point easily, and a screw blade can not be accurately implanted into the neck of femur at a time.The auxiliary device used in PFNA internal fixation surgery comprises a positioning and guiding base plate and a guide pin positioning and guiding mechanism connected with the positioning and guiding base plate through a positioning rod assembly.The positioning and guiding base plate is arranged above the hip joint and corresponds to a PFNA to be implanted into the femur in position in the vertical direction, and the positioning and guiding base plate can be used for preliminarily determining the implantation position, depth and diameter of the PFNA.The guide pin positioning and guiding mechanism can be used for further accurately determining the implantation position and depth of the PFNA and a screw blade.The positioning rod assembly can be used for adjusting the implantation direction of the screw blade.The auxiliary device is mainly applied to closed reduction PFNA internal fixation treatment of femoral intertrochanteric fractures.

The invention relates to the field of medical appliances, and discloses a femoral nail embedding reductor. According to the femoral nail embedding reductor, an intramedullary guidance device is arranged at a fracture near end; a lifting rod is arranged at a fracture remote end; intramedullary guidance is performed at the fracture near end; lifting reduction is performed through two lifting pins in sagittal view and coronal view at the fracture remote end; fracture three-dimensional reduction is performed through femora intramedullary guidance; the fracture near and remote ends can be accurately repositioned and temporarily fixed through simple fluoroscopy; and the femoral nail embedding reductor is convenient for intramedullary guide pins to be embedded and has high safety and accuracy. The femoral nail embedding reductor can be matched with the existing intramedullary nails for clinical use, and is simple to operate. Scales are formed on the lifting rod, the required lifting distance can be more accurately fixed during operation, and the femoral nail embedding reductor is accurate for reduction. The femoral nail embedding reductor breaks the traditional occlusion manual reduction, reduces the damage to the biological environment at the fracture ends, greatly enhances the operation safety, reduces operation complications, and can obviously reduce X-ray fluoroscopy amount and protect doctors and patients.

The invention relates to a modified proximal femoral nail. The modified proximal femoral nail is characterized in that an intramedullary nail comprises a main nail body, a first screw, a second screw,a third screw and a locking nail; the first screw is perpendicular to the proximal axis of the main nail body; the second screw and the distal axis of the main nail body form an angle of 140 to 150 degrees; the third screw and the distal axis of the main nail body form an angle of 140 to 145 degrees; the second screw is in the same plane as the axis of the main nail body 1 when viewed from the side; the axis of the first screw is 5 degrees ahead of the plane of the second screw and the main nail body; the axis of the third screw is 5 degrees behind the plane of the second screw and the main nail body. The modified proximal femoral nail has the advantages of enhancing support stability of the screws to a rear column, improving anti-rotation and varus stress of head and neck bones, being inline with the biomechanical requirements for proximal femoral internal fixation, preventing post-fracture complications, and improving treatment effectiveness.

The invention relates to a quick positioning device for a femoral-nail entry point. The quick positioning device for the femoral-nail entry point comprises a rectangular metal frame, a fixing rod anda connecting rod, wherein the fixing rod is connected on an operating table, the two ends of the connecting rod are connected with the rectangular metal frame and the fixing rod through angle adjusting pieces capable of adjusting the angle respectively, and meanwhile guiding needle grooves and a needle threading groove which are located in the same place are formed in the rectangular metal frame,wherein guiding needles conveniently move in the guiding needle grooves and the needle threading groove. The quick positioning device for the femoral-nail entry point has the advantages that quick positioning of a needle inserting point can be achieved before operating or in the operating process through the positioning device, the puncturing number of times for patient leg positioning during needling inserting is decreased, and patient pains are reduced; meanwhile, the height and the angle of device are adjusted for unsuitable positions, and the quick positioning device is simple in structureand quite convenient to assemble and disassemble.

A jig for placing a screw to stabilize a femoral nail comprises a shell, a drill guide assembly movably mounted on the shell, and having a plurality of radiopaque markers affixed thereon, a magnetic field generator, and a plurality of magnetic location sensors responsive to magnetic fields produced by the magnetic field generator. A position processor is operative to compute positional information of the magnetic location sensors based on signals communicated thereto. The positional information is placed in registration with an anatomical image so that the drill guide assembly can be aligned with a transverse bore in the femoral nail.

The invention discloses a femoral nail guide pin positioning system and a using method thereof. The system comprises a positioning device and a guide pin device; the positioning device comprises a base and a first sliding rod perpendicularly fixed to the base, a first sliding block and a cross-shaped sliding lock are connected to the first sliding rod in a sliding mode separately, a second slidingrod perpendicular to the first sliding rod is connected to the cross-shaped sliding lock in a sliding mode, a second sliding block is connected to the second sliding rod in a sliding mode, and a first locking screw perpendicular to the first sliding rod and a second locking screw perpendicular to the second sliding rod are arranged on the cross-shaped sliding lock separately. In-vitro positioningof the thighbone axle wire can be achieved through the positioning device, and guide pins are guided into the thighbone ideal position at a time through the guide pin device after positioning is completed, so that accurate positioning of the guide pins is achieved, the phenomenon that the guide pins are repeatedly guided is avoided, the operation efficiency is improved, operation wounds of a patient and intraoperative blood loss are greatly reduced, and the operation infection risk is lowered.

The invention relates to medical devices, and provides a femoral nail opening guider. The guider comprises a long arm supporting bracket and a short arm supporting bracket which is perpendicular to the long arm supporting bracket, guiding holes are formed in the long arm supporting bracket and the short arm supporting bracket, a plurality of guiding holes perpendicular to the long arm supporting bracket are formed in the long arm supporting bracket, a plurality of guiding holes perpendicular to short arms are formed in the short arm supporting bracket, and the guiding holes are located on thesame section. The guider adopts the principle of two points and one line, when a long arm guiding tube is completely pressed against the outer side of the cortex of a femoral shaft, the intersection point of extension lines is located at the center of a femoral marrow cavity, the tip part of the femur trochanter or the pyriform sinus is used as the point of penetration, the structure is simple, the implementation is convenient, and the positioning is fast and accurate.

A femoral nail includes a proximal section, a distal section remote from the proximal section, and an intermediate section disposed between the proximal section and distal section and having first and second curved portions. The first curved portion is positioned closer to the proximal section than the second curved portion. The second curved portion is curved in a first plane, and the first curved portion is curved in the first plane and a second and third plane.

The invention relates to a femoral nail mouth opener with a three-dimensional positioning function, which comprises an identification rod, a handle, a puncture rod, a puncture head and a guide needle;one end of the identification rod is connected with the handle, and the end part of the other end of the identification rod is provided with a positioning needle which is perpendicular to the rod; one end of the puncture rod is detachably connected with the handle, and the other end of the puncture rod obliquely extends towards one side of the other end of the identification rod, and the end partof the other end of the identification rod is connected with an arc-shaped guide needle tube; one side of the guide needle tub, departing from the identification rod, is provided with a guide needlegroove, and one end of the guide needle tube, away from the puncture rod, is provided with an opening, the puncture head is a conical head, the axis of the puncture head is parallel to the identification rod, and the conical bottom end of the puncture head is connected with one end of the puncture rod, away from the guide needle rod; the front end of the guide needle extends into the guide needlegroove and sequentially runs through the guide needle tube and a channel, an angle alpha is formed between the extension line of the axis of the front end of the guide needle and the axis of the rearend of the guide needle, wherein alpha is equal to or greater than 15 degrees and equal to or smaller than 20 degrees; the guide needle and a positioning needle are arranged on the same plane. The device has the advantages of being capable of effectively and rapidly positioning, accurately inserting the guide needle, and flexible and convenient operation.

The invention discloses a proximal femoral nail extractor. The proximal femoral nail extractor is characterized by comprising a handle, a U-shaped support, a square column, an external thread column, a jacket, an internal thread sleeve, a round column, an anti-rotation pin, a spring and an ejecting screw, the U-shaped support is fixed to the first end of the handle, two rotating shaft parts are fixedly arranged on the left end face and the right end face of the square column and rotationally connected with the left side and the right side of the U-shaped support respectively, the external thread column, the jacket, the internal thread sleeve and the round column are fixedly arranged on the four side wall faces of the square column respectively, four pin holes are formed in the left end face of the square column, the right end of the anti-rotation pin can be inserted in one pin hole, an inner blocking platform is arranged on the outer wall of the middle of the anti-rotation pin, and the left end of the anti-rotation pin sequentially penetrates through the spring and the left side of the U-shaped support to be fixedly connected with an outer blocking platform. The proximal femoral nail extractor can be used for extracting a lag screw or / and a lock pin when an accident (such as screw sliding or nail breaking) happens to a proximal femoral nail.

The invention relates to a proximal femoral nail guide pin in vitro locator, and belongs to the technical field of medical apparatuses. The locator comprises an indicating pin part and a base fixing part, wherein the base fixing part comprises a first connecting shaft and a second connecting shaft; the first connecting shaft is an arc-shaped shaft with two ends fixedly connected to the second connecting shaft; clamping tongs, which are in shaft connection to the ends of the second connecting shaft, are arranged at two ends of the second connecting shaft, and opening parts of the clamping tongs are opened and closed by virtue of the second connecting shaft; and the indicating pin part is connected to the first connecting shaft by virtue of a shaft connecting part which is located in a same plane with the indicating pin part and is in hard connection to the indicating pin part, and the indicating pin part is capable of doing a relative motion. With the application of the locator disclosed by the invention, the specific position of a guide pin which is punched into femoral head can be specifically located, so that the guide pin can be punched into the ideal position of the femoral head in one time; therefore, injury to a bone structure due to repeated operations is avoided and a failure rate of postoperative internal fixation is reduced, and meanwhile, an X-ray exposure amount of doctors in an operation is also reduced.

The invention relates to a near-end side-by-side dual-screw type proximal femoral nail. The near-end side-by-side dual-screw type proximal femoral nail comprises a femoral nail main nail, two near-endhead and neck screws and a far-end lock nail, wherein the femoral nail main nail comprises a near-end part, a transition part and a far-end part; a near-end screw passage allowing the two near-end head and neck screws to be mounted side by side is formed on the near-end part, and a far-end screw passage cooperating with the far-end lock nail is arranged on the far-end part; an inner lock nail forfixing the near-end head and neck screws is also in screw connection to the end of the near-end part; and an internal thread hole cooperating with the inner lock nail is formed in the near-end part and is sealed through a tail cap. Through the two near-end head and neck screws arranged side by side on the near-end part, the femoral nail has good screwing resistance, can effectively antagonize inversion trend of femoral head and neck fracture fragments, and can reduce stress of the head and neck screws.

The invention discloses a femoral nail position adjusting system and an adjusting method. A horizontal adjusting component which can be jacked and pushed from a side surface and a vertical adjusting component which can be jacked and pushed vertically are mounted on the basis of a support rack which can be adjusted in a three-dimensional manner; the horizontal adjusting component and the vertical adjusting component are respectively aligned to an inclined end of a femoral nail of thigh bone; and the horizontal adjusting component and the vertical adjusting component are respectively adjusted through jacking and pulling according to the inclination degree of the femoral nail till the femoral nail inside the thigh bone is in a direction accordant with that of the thigh bone. By adopting the femoral nail position adjusting system, the femoral nail which is inclined inside the thigh bone is corrected through a horizontally adjusted screw rod and a vertically adjusted screw rod. The inclination angle of the femoral nail can be adjusted at will. The femoral nail position adjusting system is simple and reasonable in structure, convenient to use, very good in effect and applicable to popularization and application.

The invention discloses a cross-occlusion proximal femoral nail. The proximal femoral nail comprises a main nail, a pressure-resistant tension nail and a tension-resistant occlusion nail, the main nail comprises a near section, a far section and a transition region, the near section and the far section are integrally connected through the transition region, a first nail hole and a second nail holeare formed in the near section of the main nail, the pressure-resistant tension nail is arranged in the first nail hole, the tension-resistant occlusion nail is arranged in the second nail hole, andthe head end of the pressure-resistant tension nail and the head end of the tension-resistant occlusion nail penetrate through the main nail and are clamped and locked through threads on the outer surfaces. The proximal femoral nail is used for reconstructing the intertrochanteric part of the proximal femoral end, the pressure-resistant tension nail and the tension-resistant occlusion nail are crossly occluded on the femoral head and the neck to form a ward triangle stable bionic support structure, the rotation stability of the intramedullary nail is improved, the pressure-resistant tension nail forms a pressure-resistant support structure, the tension-resistant occlusion nail forms a tension-resistant suspension structure, the compression stress at the head-neck junction of the intramedullary nail is dispersed, and the risk of breaking of the main nail and a head nail is reduced.

The invention discloses a visual internal lock type femoral nail. Firstly, polyamide resin, polyacrylic resin, tetraethylene glycol dimethacrylate and dimethylaminoethyl methacrylate are preliminarilymixed, polyethylene glycol, polylactic acid, propylene glycol alginate, zinc oxide, magnesium oxide and chitosan are added, various additives, such as an accelerant, are added, uniform mixing is performed, then the materials are put into an extruder, extrusion granulation is performed, finally the materials are put into an injection molding machine, injection molding is performed, and the accelerant selects bis (pentane-2,4-dionato-O, O') bis (propan-2-olato) titanium, titanium acetylacetonate, bis (2,2,6,6-tetramethyl-3,5-heptanedionato) magnesium dihydrate, ethylenediaminetetraacetic acid disodiu, 4-[2-(2-methoxy-5-chlorobenzamido) ethyl] benzene sulfonamide, 2-acrylamido-2-methylpropane sulfonic acid and bis (1-butyl-3-methylcyclopentadienyl) zirconium dichloride. The formed femoral nail femoral nail has good biocompatibility, and meanwhile further has high tensile strength and yield strength.

The invention discloses a guiding device for placement of proximal femoral nails. The guiding device includes a base, a supporting rod, a first ruler, a fixing vertical rod, a guiding sleeve and a cross bar. The supporting rod is fixed to the base through a supporting rod fixing adjustment rotary knob, the fixing vertical rod is connected to the upper portion of the supporting rod, a first slidingsleeve and a second sliding sleeve are arranged on the fixing vertical rod, a dial A is welded to the first sliding sleeve, and a dial B is welded to the second sliding sleeve; the second sliding sleeve is arranged below the first sliding sleeve, the first ruler arranged on the graduated surface of the dial A penetrates through a rotating shaft and is fixed by a first ruler adjusting rotary knob,a rotating shaft fixing rotary knob penetrates through the second sliding sleeve to fix the rotating shaft, and a retractable contrast ruler is perpendicularly connected to one side of the first ruler. The guiding device has the advantages of being simple in structure, low in cost, easy to operate and capable of preventing a nail embedding device from penetrating through the lateral side of the femur during dismounting surgery so that surgical risks can be reduced.

The invention provides a medical PFNA (Proximal Femoral Nail Anti-rotation) positioner. One side of a needle guide tube is connected with a positioning rod through a handle; the lower end of the needle guide tube is provided with a circular-tooth-shaped antiskid tube head; the upper end of the needle guide tube is provided with a trumpet-shaped tube insertion opening. During usage, shaking and deviation of the needle guide tube can be prevented through the positioning rod, meanwhile the lower end of the needle guide tube is provided with the antiskid tube head and accordingly the needle guide tube can be pierced at the intramedullary accurate position and the sliding can be avoided, and accordingly an intramedullary operation can be accurate and rapid in positioning, the operation time can speed up, and the pain of a patient during operation can be reduced.

The invention discloses a femoral nail two-point multi-dimensional positioning device and method. A front universal joint and a rear universal joint are arranged at the adjusting tail end of a front multi-dimensional adjusting mechanism and the adjusting tail end of a rear multi-dimensional adjusting mechanism. The free swing part of each universal joint is provided with an adjusting shaft hole. The front adjusting shaft hole and the rear adjusting shaft hole are each internally fixedly provided with an adjusting shaft sleeve. A femoral nail is sleeved with the adjusting shaft sleeves. By vertically or longitudinally adjusting the front multi-dimensional adjusting mechanism and the rear multi-dimensional adjusting mechanism, the femoral nail can be adjusted at any angle and can be correctly nailed in by two times of operation at most, the nailing accuracy is improved, the number of nailing times is reduced, and the device has the advantages of being rapid and accurate. Thus, the operation difficulty of a doctor is reduced, and the degree of damage to bones of a patient is reduced.

The invention provides a femoral intramedullary nail device, a use method and the application thereof.The femoral intramedullary nail device comprises a main nail and a lag screw, a through obliquely-inserted locking hole is formed in the surface of the main nail, the lag screw comprises an inner core rod and a sleeve rod which are arranged in a nested mode, the sleeve rod is divided into a deformation section and a fixing section, the main nail is implanted into a femoral medullary cavity. the lag screw penetrates through the oblique insertion locking hole, the deformation section is screwed into a separated fracture block, the fixing section is fixed in the main nail, the fixing section is of a tubular structure, the deformation section comprises at least two bendable ridge plates, the bendable ridge plates surround the inner core rod, grooves are formed in the middles of the bendable ridge plates. The device is rotated to extrude the deformation section, and the bendable edge plates are bent towards the periphery from the grooves. The femoral nail has small influence on the fracture end of the femur, enhances the elasticity of the main nail, conforms to the anterior arch angle characteristics of the femur, and can reduce the stimulation to the medullary cavity.

The invention provides a PFNA (proximal femoral nail antirotation) femoral intramedullary nail short nail support, and particularly relates to the technical field of medical instruments. The support comprises a handle and a short nail, wherein a mounting hole is formed in the lower end of the handle, and one end of the mounting hole is connected with one end of the short nail; a sighting arm is arranged at the upper end of the handle, one end of the sighting arm is connected with the handle, the sighting arm is divided into a near-end sighting arm and a far-end sighting arm, a threaded sleeve is arranged at the other end of the near-end sighting arm, an intramedullary nail is arranged in the threaded sleeve, a near-end hole matched with the intramedullary nail is formed in the side wall of the short nail, the hole wall of the near-end hole is in sliding connection with the intramedullary nail, a sleeve and a through hole matched with the sleeve are arranged at the other end of the far-end sighting arm, the hole wall of the through hole is in sliding connection with the sleeve, a fixing nail is arranged in the sleeve, a far-end hole matched with the fixing nail is formed in the side wall of the short nail, and the hole wall of the far-end hole is in sliding connection with the fixing nail. According to the PFNA femoral intramedullary nail short nail support, the intramedullary nail can be fixed more stably.

The invention discloses a steel wire bundling and fixing device based on a proximal femoral nail antirotation (PFNA) system, comprising a ring-shaped gasket and an insertion-type U-shaped belt loops steel plate, etc., and the ring-shaped gasket is matched with a tail cap and attached between the tail end of a main nail and the tail cap of the PFNA system, being a ring-shaped titanium alloy sheet.The insertion-type U-shaped belt loops steel plate is matched with the trochanter spiral blade or lag screw of the PFNA system, and comprises an insertion rod, a clamping block, and a U-shaped sheet.On the basis of fixing intertrochanteric fracture by the PFNA system, by the ring-shaped gasket and an insertion-type U-shaped belt loops steel plate, wires are utilized for bundling and fixing the fracture of front and back walls, and outer side walls of the trochanter part and the rip parts of the large trochanter part, to provide a support with sufficient strength for the intertrochanteric fracture, so as to give a guarantee for early movement out of a bed and smooth healing of the fracture of a patient, while providing a minimally invasive surgery operation device, with simple operation and low cost.

The invention discloses a high-mechanical-stability nail external-guidance and internal-fixation configuration device comprising a guide apparatus, a connecting plate, a connecting screw, an intramedullary nail, a first femoral nail, a second femoral nail, a locking nail, a first femoral nail hole, a second femoral nail hole, a first cylindrical locating pin and a second cylindrical locating pin, wherein the first femoral nail hole and the second femoral nail hole are formed relatively in a triangular manner. The high-mechanical-stability nail external-guidance and internal-fixation configuration device is provided with the first femoral nail hole and the second femoral nail hole for locating, and the two holes are formed relatively in a triangular manner to form a triangular stable structure to imitate physiological and mechanical states and increase the mechanical stability of the whole structure, so that the device is beneficial for natural healing of a fracture site and is improved in accuracy and relatively low in instrument cost.