171 results about "Fracture block" patented technology

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.

A manufacturing method for a posterior column lag screw 3D navigation module used for acetabulum fracture comprises the following steps that A, according to simulation reestablishing, 3D reestablishing is performed according to pelvis thin layer CT scanning data of an object with the acetabulum fracture so as to obtain an original 3D reestablished model, on the basis of the original 3D reestablished model, fracture block division is performed along the fracture line, and the femur head is removed so as to obtain a fracture block separation model, and on the basis of the fracture model, a single fracture block 3D space position is adjusted to recover the normal anatomic form of the acetabulum, so that a fracture reduction model is obtained; B, according to virtual posterior column slag screw implanting simulation, on the basis of the fracture reduction model, a posterior column slag screw implanting fracture reduction model is simulated with a cylinder on the fracture reduction model; C, according to obtaining of a navigation module simulation body, the navigation module simulation body is established according to the cylinder, so that the navigation module simulation body with screw channels is obtained; D, the navigation module is obtained through 3D printing. The manufactured navigation module has the advantages that the manufacturing technology is simple, precision is high, and safety is good.

The invention relates to a combination type ankle joint three-dimensional traction fixing frame. The fixing frame mainly comprises a horseshoe-shaped ring and four carbon fiber connecting rods. Three Kirschner pins are locked through pin locking screws, pass through heel bones, shin bones and metatarsal bones three-dimensionally and are fixed on the horseshoe-shaped ring and the four carbon fiberconnecting rods; and one or more ejector pins are locked through the pin locking screws to fix an inner ankle, an outer ankle and a rear ankle of an ankle bone. The fixing frame has a compact and stable structure, is convenient to use and detach and has low using cost, ankle joints and fracture blocks are firmly fixed, periosteum is not required to be stripped by a surgery, and the healing of damaged ankle joints is facilitated.

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.

The invention discloses an anti-falling device of an attached lifting scaffold, which comprises a suspension rod of which the top part is connected with an attachment device of the attached lifting scaffold, and a falling protector arranged on the lower part of a main frame of the attached lifting scaffold, wherein the suspension rod passes through the falling protector to extend along the lower part of the scaffold; the falling protector comprises a body, a fixture block, a return spring and a push rod; an inclined plane slideway is arranged in the body of the falling protector; the contact surface of the fixture block which is arranged relative to the left side and the right side of the suspension rod and suspension rod is provided with braking screw threads; the fixture block is arranged in the inclined plane slideway; the return spring is arranged between the bottom of the fixture block and a lower end cover of the body; and the push rod is hinged on an upper end cover of the body, and a position, corresponding to the fixture block, of the upper end cover is provided with an ejector rod. The anti-falling device is characterized by further comprising an excitation device which comprises a guy cable of which one end is connected with the push rod, and a steering apparatus arranged on the lower part of a frame body, wherein the guy cable rounds the steering apparatus, and the other end of the guy cable is connected with a lower hook of an electric block of the attached lifting scaffold. The anti-falling device of the attached lifting scaffold has the advantages of being simple in structure, convenient and practical; when the electric block is stressed, the anti-falling device is in an open state, and the scaffold can be operated freely; when a chain of the electric block is fractured, the fixture block can be excited to reset quickly to ensure that the braking screw threads on the fracture block contact the suspension rod.

The invention discloses a volume fracturing method for activating natural fractures on a large scale. The volume fracturing method comprises the steps that step (1) parameter evaluation and optimization are performed; step (2) run bridge plug perforation joint operation is performed; step (3) acid pretreatment operation is performed; step (4) fracture making construction by low-viscosity slipperywater or acid slippery water is performed; step (5) major fracture blocking construction by mixed proppants and sand is performed; step (6) stepped displacement increase construction is performed; step (7) mixed injection construction of the 140-210 mesh proppant and the 70-140 mesh proppant is performed; step (8) major fracture flushing construction by high-viscosity fracturing fluid without sandis performed; step (9) second and third major fracture blocking and subsequent construction are performed, the steps (5)-(8) are repeated, and then the steps (5)-(7) are repeated; step (10) construction of a major fracture by high-viscosity fracturing fluid with sand is performed; and step (11) displacement operation is performed. According to the volume fracturing method, the complexity of the fractures and the reconstruction volume can be increased during reconstruction of a reservoir, and thus, efficient production increase of a shale gas well is realized.

The invention relates to a method for repair-welding of an iron casting. The section of the iron casting is grinded with a groove; the pre-welded part of the iron casting is preheated and then welded with welding rods; after welding, the heat of the welded part is preserved; before the pre-welded part is preheated, the section of the iron casting is drilled with a hole and cut with a screw thread; then a bolt is installed in the hole and is welded for fixing. The adoption of the novel welding method can solve the problems which can not be solved by an ordinary welding method: 1. a plurality of fractured blocks with irregular shapes; 2. relatively small areas of the fractured blocks; 3. relatively thick workpieces; 4. the fractured places need to bear longitudinal and horizontal shearing forces. In addition, the method also has strong actual operability, low work cost, high production efficiency and the strength and the anti-shearing of the repair-welded load-bearing iron casting base is equivalent to the performance of the original iron casting base.

The invention discloses a hollow screw for repairing damaged ligaments or tendons, which comprises a hollow screw body. The hollow screw body is composed of a nail head, a nail body and a nail tail connected in sequence, and a groove is provided in the upper middle of the nail tail. , the outer wall of the nail tail is provided with a suture through hole, and the suture through hole is used for suturing and repairing the damaged ligament or tendon to pass through; the front end of the nail head is open, and the nail head, nail body and groove Interconnected to become a through space for coaxial passage of guide pins. The hollow screw used for repairing damaged ligaments or tendons can not only fix fracture fragments, but also assist in suturing and fixing damaged ligaments or tendons, which not only simplifies operation, reduces operation trauma, but also saves treatment costs.

The invention provides a bone plate implanted from the front inner side of the distal femur, belonging to the technical field of medical apparatus and instruments for the department of orthopaedics, and used for treating the condylar fracture and bone shaft fracture of the distal femur. The technical scheme is as follows: the bone plate is composed of a bone plate condylar part, a transitional face and a bone plate shaft part which are connected together, wherein the bone plate condylar part is opposite to the front inner side surface of the condyle of the distal femur, the lower surface of the bone plate condylar part is adaptive to the front inner side surface of the condyle of the distal femur in shape, the bone plate shaft part is opposite to the inner side surface of the distal femur, the lower surface of the bone plate shaft part is adaptive to the inner side surface of the distal femur in shape, and a plurality of fixing holes are uniformly distributed on the bone plate condylar part and the bone plate shaft part. The bone plate provided by the invention belongs to an innovation for the bone plate for the distal femur, therefore, the problem that when the existing bone plate is implanted from the outer side of the distal femur, the fixation for the condyle fracture on the inner side of part of the distal femur is not firm is solved, and the fracture blocks on the inner side of the distal femur can be effectively and firmly fixed, so that the heal of the fracture blocks on the inner side is promoted, and therefore, the bone plate has extremely good promotion and utilization values in the industry.

The invention discloses a fracture block fixing traction tracking device for an orbit surgery department endoscope navigation system. The fracture block fixing traction tracking device comprises a base part, a holding part and a tracking part. The bottom of the base part is provided with an annular-tooth-shaped structure in contact with the surface of a bone block, a countersink structure is arranged at the center of the base part which is fixed on the holding part through a nut, the tracking part is fixed on the holding part though a wedge protrusion, and the tracking part is provided with a witch ball array used for reflecting infrared rays. The fracture block fixing traction tracking device can be used for repair and reconstruction of orbit marginal bones of the orbit surgery department, the small base part can reduce influence on surgical operation, when the fracture block needs to be pulled and displaced, the holding part can be installed, and when the spatial position of the fracture block needs to be observed visually, the tracking part can be reinstalled. The fracture block fixing traction tracking device can be repeatedly assembled and disassembled in the operating process, and the original navigation precision can be maintained without registration again.

The invention relates to a temporary blocking and deflection fracturing method of an in-layer artificial fracture in a coalbed gas well. According to the temporary blocking and deflection fracturing method, a fracture blocking agent with the high strength is used to enter an opened fracture along with adding of fracturing fluid to form bridge blinding, net pressure of the fracture is improved, fluid is subjected to deflection in a stratum to form fractures in different directions or enable fractured sand to be uniformly distributed in the fracture, so that a new fluid flowing channel is openedin a reservoir, wider communication of an oil and gas reservoir is achieved, and oil and gas production is increased.

The invention discloses an auxiliary wing type steel plate which comprises a locking module and a gripping module fixedly connected with the locking module. The locking module is provided with a horizontal connection face which is provided with screw connection holes. The gripping module comprises a plurality of inner-arc-shaped gripping arms. When the auxiliary wing type steel plate is installed, the locking module is connected with a locking compression plate, comminuted fracture blocks are effectively gripped through the gripping module, the auxiliary wing type steel plate is buckled to the locking compression plate, and the auxiliary wing type steel plate can slide at will according to actual needs; when the comminuted fracture blocks are effectively gripped through the gripping module, the auxiliary wing type steel plate is locked to a locking connection plate by means of the locking module through screws, fixation of the fracture end can be maintained, the fracture end can beneficially heal, and the auxiliary wing type steel plate is used for the field of medical instruments.

The invention relates to a patella bone fracture inner fixer, which comprises an upper end fixing device, a lower end fixing device and a pressurizing device, wherein the upper end fixing device comprises an upper end fixing plate, an upper end fixing claw and an upper end projected plate; the upper end fixing claw is connected at one side of the upper end fixing plate; the outer surface of the upper end fixing plate is provided with the upper end projected plate; the lower end fixing device comprises a lower end fixing plate, a lower end fixing claw and a lower end projected plate; the outer surface of the lower end fixing plate is provided with a lower end projected plate. The patella bone fracture inner fixer has the advantages that after a bone fracture block is fixed by using the patella bone fracture inner fixer through the upper end fixing claw and the lower end fixing claw, a middle pressurizing screw rod can be tightly screwed for pressurizing and gathering the bone fracture block; the fixing device is also provided with a plurality of locking nail holes; fragmentary bone blocks can be fixed according to the bone fracture position and requirements by screws, so that a good bone fracture fixing effect is achieved. A patient can perform functional training in an early stage, so that the joint function can be well recovered.

The invention discloses a wing type anatomical plate for the proximal humerus. The anatomical plate comprises a transition zone and a far-end zone. A near-end portion of the moving region comprises a left wing portion extending towards the upper left direction and a right wing portion extending towards the upper right direction. A concave portion is formed between the left wing portion and the right wing portion. According to the wing type anatomical plate, the concave portion is arranged, so that impacting of the shoulder joint against acromia in an uplifting process is prevented, and pains of patients are reduced. A fracture block is firmly wrapped in the plate through triangular fixation formed by the left and right wing portions and the far-end region, and re-displacement cannot occur. Simultaneously, the left and right wing portions are thin, so that a good bending property is provided, and rebuilding of humeral neck stem angles is facilitated.

The invention discloses an anatomical femoral trochanter locking steel plate, relates to the technical field of medical instruments, and aims to avoid the condition that the steel plate needs to be repeatedly bent for shaping before an operation and to simplify the operation. The main technical scheme is that the anatomical femoral trochanter locking steel plate comprises a trochanter part and a femoral part connected with the trochanter part, wherein the trochanter part is adaptive to the anatomical shape of the rear part of a human femoral trochanter, and the femoral part is adaptive to the anatomical shape of the rear part of a human femoral shaft; a big trochanter tongue flap, a small trochanter tongue flap, a first connecting part and a second connecting part are arranged on the trochanter part; the first connecting part is arranged between the big trochanter tongue flap and the small trochanter tongue flap; the second connecting part is arranged between the big trochanter tongue flap and the femoral part. The anatomical femoral trochanter locking steel plate is mainly used for fixing femoral trochanter fracture blocks.

The invention discloses a method and system for determining the position of a ground shallow shaft micro-seismic monitoring observation station. The method comprises the steps that the work area dataof a fracturing block are acquired, and the influencing factors of monitoring observation station setting are analyzed; a three-dimensional geological model is established according to the geologicaldata of the fracturing block and surface exploration data; shallow surface wave forward modeling is carried out the three-dimensional geological model to acquire a surface wave attenuation curve withdepth and determine the embedding depth; the fracturing block distribution and the depth of a target layer are analyzed, and hydraulic fracturing micro-seismic origin distribution simulating is carried out to determine the maximum horizontal layout range; according to the influencing factors, the layout mode of the monitoring observation station is determined, and the number of the monitoring observation station is determined; and the layout coordinate is determined according to the embedding depth, the maximum horizontal layout range, the layout mode and the number of the monitoring observation station. According to the invention, the collection cost can be reduced; the amount of seismic record data is reduced; the calculation efficiency is accelerated; and the method and system have certain advantages in the stage of multi-well long-term monitoring and development zone.

The invention relates to a fracture external fixing frame and particularly relates to a fracture external fixing frame with an adjustable axial pressure among bone blocks, belonging to external fixation instruments for fracture treatment. According to the fracture external fixing frame, the problem that the space among fractured blocks usually cannot be properly pressurized when fracture is steadily fixed by virtue of an existing fixing instrument is solved. The fracture external fixing frame is characterized in that a frame rod is segmented, and one or two ends of each segment is / are providedwith plugs or interfaces; spring devices (including one or more of metal springs, gas springs and elastic matter pads) are arranged in the plugs or the interfaces and are spliced to form connecting devices for adjusting the axial pressure among the bone blocks, and the frame rod segments can form an integrated combined frame rod by the connecting devices. By adjusting the elastic forces of the whole spring devices, the action forces of the connecting devices on two frame rod segments on two sides in the long-axis direction are changed, and therefore, the axial pressure among the bone blocks is adjusted. The fracture external fixing frame is applied to fracture fixation, and when the fracture is steadily fixed, excessive stress shielding can be avoided, and the axial pressure among the bone blocks can be flexibly quantized, adjusted and controlled into a proper level required by fracture healing, so that fracture healing is promoted.

The invention relates to an acetabulum reconstruction plate for effectively fixing acetabular posterior wall fracture, belongs to the technical field of osteopathic medical appliances, and is used for effectively fixing acetabular posterior wall fracture. According to the technical scheme provided by the invention, the acetabulum reconstruction plate comprises a strip-shaped bone fracture plate and multiple hooks arranged on one side of the bone fracture plate in parallel, wherein the upper ends of the hooks are fixedly connected with the edge of the bone fracture plate, the lower parts of the hooks are bent, and the bent curvature degree are matched with the acetabular posterior wall. According to the acetabulum reconstruction plate with the structure, the hooks on one side of the bone fracture plate recline against the outside of the acetabular posterior wall fracture block, the acetabular posterior wall fracture block can be fixed directly or the hooks can be inserted into the fracture block for fixing, therefore satisfied treatment effect on severely injured acetabular posterior wall is achieved as well as sequela and subsequent surgeries caused by acetabular posterior wall injury are prevented. The acetabulum reconstruction plate has the advantages of simple structure, convenience in use and significant benefits; by the adoption of the acetabulum reconstruction plate, unexpected good effect can be achieved, the difficulty in treatment of acetabular posterior wall injury can be solved, therefore the acetabulum reconstruction plate is worthy of popularizing and using.

The invention discloses a kirschner wire bending device. the device comprises a circular straight-rod hand rod, a handle is arranged at one end of the hand rod, two U-shaped snapping grooves formed and produced integrally with the hand rod are formed in the other ends, and the two U-shaped snapping grooves are vertical to form a cross U-shaped snapping groove. Two bending devices are required to be matched to be used, and during usage, a kirschner wire is sleeved in the U-shaped snapping groove of the first bending device and is held tightly; meanwhile, the kirschner wire is sleeved in the second bending device which is needed to be adjacent to the first bending device, the position of the first bending device is kept unchanged, a T-shaped handle of the second bending device is rotated clockwise or anticlockwise, bending can be performed through two hands by one person or single hands of two persons, the kirschner wire tail can be bent lightly, and the maximum bending angle can reach 180 degrees. Displacement of the kirschner wire tail can be prevented after the first bending device is held tightly; meanwhile, the two bending devices act on the kirschner wire simultaneously, and a couple action is provided; a pry bar point only acts on the kirschner wire bending point and cannot produce shearing force on the fracture end, so that re-displacement of fracture blocks can be prevented.

A pair of mandibular condyle sagittal fracture reduction forceps comprises a pair of sub forceps bodies hinged together. Each sub forceps body comprises a handle and a forceps head. The pair of the forceps is characterized in that the forceps are bent downward while bent inward, the section size of the forceps heads is gradually reduced from the hinge point to the free end, the free end of the forceps head of one sub forceps body is provided with a chuck, and the side face of the chuck is provided with a widening panel. Compared with the prior art, the pair of the mandibular condyle sagittal fracture reduction forceps has the advantages of fully exposing views, avoiding surrounding vessels and nerves, clamping free mandibular condyle sagittal bones, assisting in reduction of the free mandibular condyle sagittal fracture and enabling surfaces of fracture blocks to be uniformly stressed, and the free mandibular condyle sagittal bones can not be broken when clamped.

The invention provides a jacking device for restoring a collapse fracture block and belongs to the technical field of orthopedic medical devices. The jacking device is used for jacking and restoring the collapse fracture block in a tibial plateau joint. According to the technical scheme, a sleeve is made of a metal sheet, jacking blocks are a plurality of identical pentahedrons, the top surface of each jacking block is rectangular, two side surfaces are trapezoid, the other two side surfaces of the jacking block are triangular, midpoints of two trapezoid side surfaces of the top block are connected with the top end edge of the sleeve, and a plurality of jacking blocks are connected around the top end of the sleeve sequentially; a jacking rod is located in a cavity of the sleeve, and the outer diameter of the jacking rod is matched with the diameter of the cavity of the sleeve. The jacking device solves the problem of insufficient jacking area caused by the fact that the tebia collapse area is remarkably larger than the bone tunnel diameter, can remarkably increase the jacking area during jacking and guarantees the jacking effect; meanwhile, the angle of the front end of the jacking device can be changed according to the position and the shape of the fracture block, damage to the collapse position structure due to mutual displacement and diastasis between the fracture blocks is avoided, and shaping recovery can be better realized after surgery.

The invention discloses a hollow lag screw guide pin aiming fixator for restoration of lesser trochanter of a thigh bone from a rear side. The hollow lag screw guide pin aiming fixator for restoration of lesser trochanter of the thigh bone from the rear side comprises an arc guide frame, wherein a restoration rack is arranged at one end of the arc guide frame; a combined sleeve which moves along the arc guide frame is arranged at the other end of the arc guide frame; the tail end of the restoration rack is connected with the arc guide frame; a restoration hook is arranged at the front end of the restoration rack; a limiting groove is formed in the restoration rack; the combined sleeve comprises an outer barrel and an inner barrel; the inner barrel moves in the outer barrel coaxially; pointed claws are respectively arranged at an outlet end of the inner barrel and an outlet end of the outer barrel; and when the combined sleeve moves along the arc guide frame, the pointed claws are always pointed to the circle center of the arc guide frame. during surgery, the hollow lag screw guide pin aiming fixator for restoration of lesser trochanter of the thigh bone from the rear side is inserted from the rear side, muscles are pushed away by the front arc-shaped restoration rack, the restoration hook hooks a fracture block of the lesser trochanter and drags to the rear lower direction, sliding of the aiming fixator can be avoided by the square limiting groove, and therefore, the restoration effect is direct and reliable.

The invention discloses a minimally invasive repositor of a tibial plateau collapse fracture block, and belongs to the technical field of orthopedics department medical equipment. The minimally invasive repositor is used for performing minimally invasive reposition on a collapse fracture block in a tibial plateau joint. The technical scheme of the minimally invasive repositor is that a repositionplate is a disk, a diameter of the reposition plate is matched with a diameter of a minimally invasive drill hole, the front end of a top rod is connected with the bottom face of the reposition plate,and the rear end of the top rod is connected with a handle, the top rod is a flexional long rod, the top rod is made of a high molecular material or a spring, and a length of the top rod is greater than a length of the minimally invasive drill hole. The minimally invasive repositor initiates a tibial plateau collapse bone block reposition minimally invasive device, and provides a new route for treating and repositioning the tibial plateau collapse bone block through a minimally invasive operation. The minimally invasive repositor is simple in structure, convenient to use, and capable of avoiding the support and fixation of a long bone fracture plate after the reposition, reducing additional operative incisions and soft tissue injuries, greatly reducing the occurrence of complications, such as postoperative incision infection and dysfunction, simplifying a medical treatment process, saving medical resources, and relieving the medical burden of a patient.

The invention relates to an internal fixation device for fracture around a proximal femoral prosthesis, which belongs to the field of medical appliances and consists of a steel plate, an embracing fixator and the like. The internal fixation device is characterized in that the steel plate is provided with 1-2 common screw holes and 2-8 locking screw holes which are used for fixing a distal fracture end; the embracing fixator comprises a main body and 3-6 pairs of embracing ring arms, the diameters of the embracing ring arms match with the size of the circumference of a proximal femur section, the embracing fixator is used for fixing a fracture block of the proximal femur section, and saw-tooth-shaped objects are arranged on the embracing ring arms at the distal end and a proximal end, are protruded to a concave side and can reinforce fixation; and the steel plate is connected with the main body of the embracing fixator, the thicknesses of the steel plate and the embracing fixator are about 5mm, and the widths of the steel plate and the embracing fixator are about 2cm. The internal fixation device is made of titanium and nickel memory alloy with a temperature memory function, has good histocompatibility, and is applicable to a patient suffering from fracture around the proximal femoral prosthesis after total hip arthroplasty or artificial femoral head replacement.

The invention relates to a fixing device for avulsion fractures of the anterior cruciate ligament (ACL) tibial insertion. The fixing device comprises a fixing plate and multiple fixed lines slidably fixed in the fixing plate. Two ends of each fixed line respectively extend out of the fixing plate from opposite directions. The whole device has a simple structure. The fixing plate and the fixed lines can slide relative to each other. In the implantation process, the position of the fixing plate can be conveniently adjusted. The operation is simple and convenient and facilitates fracture reduction and pressed fixation of the ACL tibial insertion during an operation, thus shortening the time for reduction and fixation surgery of fractures and simplifying the operation. The contact area betweenthe fixing plate and a fracture block is large, and the fixation is firm. No secondary surgery is required to remove a fixture, which reduces operative wounds and improves the quality of the operation. The device of the invention is applicable to various types of avulsion fractures of ACL tibial insertion.

The invention relates to medical equipment, in particular to an orthopedic operation assist device which comprises a left clamp and a right clamp, wherein the left clamp comprises a guide rod and a sliding rod, a guide groove is arranged on the guide rod, the tail end of the sliding rod is provided with a screw fixing plate; the right clamp comprises a sliding sleeve, a guide rod, a guide pipe and a screw, the sliding sleeve is connected with the guide pipe through the guide rod, a slot at the middle of the guide rod is movably connected with one end of the screw, and the other end of the screw is movably connected with the screw fixing plate of the sliding rod. The assist device can accurately measure the length of the required bolt, plays a role of temporally fixing the fracture end, ensures the stability of the fracture end during the internal fixation, can be used for fixing the fracture block or the fracture end with a separating trend, can prevent the fracture block from separating, and can be used for accurately throwing the screw into a required part through the guide pipe arranged on the right clamp without damaging soft tissues and important vessels and nerves at opposite sides.

The invention relates to a repair-welding method of an iron casting. The section of the iron casting is grinded with a groove; the pre-welded part of the iron casting is preheated and then welded withwelding rods; after welding, the heat of the welded part is preserved; before the pre-welded part is preheated, the section of the iron casting is drilled with a hole and cut with a screw thread; then a bolt is installed in the hole and is fixed by welding. The adoption of the novel welding method can solve the problems that can not be solved by an ordinary welding method: 1. a plurality of fractured blocks with irregular shapes; 2. relatively small areas of the fractured blocks; 3. relatively thick workpieces; 4. the fractured places need to bear longitudinal and horizontal shearing forces.In addition, the method also has strong actual operability, low work cost, high production efficiency and the strength and the anti-shearing of the repair-welded load-bearing iron casting base is equivalent to the performance of the original iron casting base.

The invention discloses a tibial plateau fracture pressurizing and fixing device, and belongs to the technical field of medical apparatuses and instruments in the orthopedic department. The tibial plateau fracture pressurizing and fixing device is used for pressurizing and fixing a tibial plateau fracture accompanied by fracture piece separation. According to the technical scheme, a fixing steel plate and a pressurizing steel plate are located on the two sides of a tibial plateau respectively, and a pressurizing screw penetrates through the fixing steel plate, the tibial plateau and the pressurizing steel plate to be pressurized and fixed through a nut so that the tibial plateau can be fixedly connected with a fracture piece. Two circular grooves are formed in the pressurizing steel plate, a through hole is formed in the center of each circular groove, an adjusting piece is embedded in each circular groove, and a long groove is formed in each adjusting piece. The area of the pressurizing steel plate is far larger than that of an ordinary nut, and the damage caused by stress concentration to bone cortex is avoided; the long grooves of the adjusting pieces are quite conveniently aligned with the pressurizing screw, the requirement for built-in precision of the pressurizing screw is lowered a surgery incision can be quite easily reduced, and the operation process is accelerated. The defects of various existing conventional methods are overcome, the surgery effect is greatly improved, and the tibial plateau fracture pressurizing and fixing device is suitable for being applied to minimally invasive surgery.