35 results about "Femoral nail" patented technology

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.

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 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 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.