70 results about "Femoral fracture" patented technology

An improved method and apparatus for reducing a hip fracture utilizing a minimally invasive procedure which does not require incision of the quadriceps. A femoral implant in accordance with the present invention achieves intramedullary fixation as well as fixation into the femoral head to allow for the compression needed for a femoral fracture to heal. To position the femoral implant of the present invention, an incision is made along the greater trochanter. Because the greater trochanter is not circumferentially covered with muscles, the incision can be made and the wound developed through the skin and fascia to expose the greater trochanter, without incising muscle, including, e.g., the quadriceps. After exposing the greater trochanter, novel instruments of the present invention are utilized to prepare a cavity in the femur extending from the greater trochanter into the femoral head and further extending from the greater trochanter into the intramedullary canal of the femur. After preparation of the femoral cavity, a femoral implant in accordance with the present invention is inserted into the aforementioned cavity in the femur. The femoral implant is thereafter secured in the femur, with portions of the implant extending into and being secured within the femoral head and portions of the implant extending into and being secured within the femoral shaft.

A femoral fracture treatment device including: an intramedullary pin (1) with a central longitudinal axis (2) and a passage (5) of non-circular cross-section (6) through a proximal portion (4) of the pin oblique to the longitudinal axis (2), a sliding sleeve (10) configured to pass through the non-circular passage (5), a longitudinal bone fixing element (20) having a head portion (22) with fixing means (23) for engaging the femoral head and a shaft (24) that may be coaxially introduced into the sliding sleeve (10). Both an external jacket surface (14) of the sliding sleeve (10) and an internal jacket surface (15) of the sliding sleeve (10) have non-circular cross-sections at least in a partial section. The shaft (24) is rotatably mounted in the longitudinal bore (13) of the sliding sleeve (10), and locking means are provided at the free end (27) of the shaft (24), such that rotation of the longitudinal bone fixing element (20) relative to the sliding sleeve (10) can be optionally locked or released.

The invention discloses an individualized femoral fracture reduction model construction method. The method comprises the steps that based on the parameterized femoral surface model construction technology, an equalized femoral deformation template is created, femoral anatomical feature points and reference points are defined, a patient's femoral simplification model is created, and an individualized approximation model is constructed; each anatomic point set in the femoral simplification model is subjected to registration of each corresponding anatomical point set in the approximate femoral model, then a deformation matrix is solved, and the automatic reduction of a corresponding fracture segment in the fracture model is achieved; a fracture profile of each fracture segment in the fracture simplification model is extracted, and projection interception are performed on each corresponding surface in the approximate femoral model, wherein each surface is smoothly connected with the adjacent surface, and a patient's individualized femoral fracture reduction model is construct. The method can construct the individualized fracture model intuitively and promptly through patient's femoral fracture segment reduction and comminuted part surface reconstruction, and has an important guiding significance to the guidance of femoral fracture surgical treatment and patient's bone plate individualized design in an orthopedic surgery by a doctor.

The present invention relates to methods and devices for treating femoral fractures, wherein a polyaxial cross member is employed to accommodate a wide range of angles and anteversions / retroversions in the femur, and different securing mechanisms can also be employed to hold and retain such polyaxial cross member in place at the desired orientation.

An implant assembly for proximal femur fracture comprises of a targeting device and intramedullary nail having plurality of proximal holes directed towards head and neck of femur wherein the axis of the holes makes an ante version angle of about 5° to 20° with the horizontal plane and at the same time axis of plurality of distal holes making 90° angle to longitudinal axis of said nail that holds the femur wherein said nail has reducing cross section area from thigh end to knee end with grooved knee end with anterior curvature even in short length version, plurality of proximal sliding hip pins with smooth shaft for collapsibility, triflanged end with mores taper to hold proximal femur, large head and washer to get impaction and plurality of distal locking screw to hold distal fragment of femur, optional buttress plate and barrels supporting lateral cortex to get controlled limited guided collapse.

The invention discloses a three-dimensional finite element constructing method based on medical image data LISS-DF to cure distal femur fracture. CT tomography is utilized to obtain the tomographic image data of an LISS steel plate and the tomographic image data of the normal sheep femur, three-dimensional medical images are divided, outline characteristic points of the three-dimensional medical images are extracted out, data are output, a surface geometrical model is initially constructed, a three-dimensional solid geometrical model is constructed, a solid geometrical model generated based on the medical images is established, the geometrical model generated based on the medical images is edited, a screw solid geometrical model generated based on the screw setting principle is established, a three-dimensional finite element model is constructed, and finally a plurality of three pyramid finite element models are generated to cure femoral fracture through different combined fixing methods between the sheep femur and near-end screws. The constructing method can form the three-dimensional finite element model containing the complete sheep femur, the distal femur fracture and the LISS-DF steel plate and the three-dimension finite element model providing the different combined fixing method for the single cortex and double cortexes of the near-end screws of the steel plate to cure the distal femur fracture. The constructing method can quickly and accurately construct the three-dimensional finite element model to cure the distal femur fracture through different combined fixing methods of the single cortex and the double cortexes of the near-end screws of the LISS-DF steel plate. Thus, the model constructing speed and the model quality are greatly improved.

The invention relates to a periprosthetic femoral fracture revision locking steel plate. The periprosthetic femoral fracture revision locking steel plate is provided with a U-type body with the shape matched with that of the thighbone. The body can be made of titanium alloy or vitallium. A first contracting part is arranged at the bottom end of the body. Each of the two sides of the body extends to form two wings, and the wings comprise the first wing, the second wing, the third wing and the fourth wing. The body and the wings are provided with a plurality of nail holes. The near end of a fracture can be fixed at multiple angles, the width of the steel plate does not need to be increased, and the screw bonding force, and the bending resisting force and rotating resisting capacity of the steel plate are all higher than those of any former fixing material. By means of locking design, blood supply damage caused by the fact that a steel plate is too closely attached to the bone face and the periosteum and soft tissue are excessively stripped can be avoided. The force arm of the steel plate is long, and by means of dispersed fixing, steel plate breakage caused by stress concentration or bone ununion caused by stress shielding can be avoided. The minimally invasive percutaneous steel plate internal fixing technology is used in cooperation, and therefore soft tissue injuries can be further reduced.

The invention relates to a femoral fracture traction apparatus with good reduction fixing effect and belongs to the technical field of orthopedic surgical instruments. The femoral fracture traction apparatus is used for traction of femurs in surgeries to recover, adjust and maintain lengths of the femurs effectively. According to the technical scheme, the femoral fracture traction apparatus is composed of a near-end fixing screw, a connecting rod, a traction bow and a fixing needle, wherein a connecting end of the near-end fixing screw is connected with one end of the connecting rod, a rotating structure for adjusting lengths is arranged in the middle of the connecting rod, the other end of the connecting rod is connected with the traction bow, and the traction bow is connected with the fixing needle. According to the femoral fracture traction apparatus, the near-end fixing screw is fixed at the near end of a femur, the fixing needle and the traction bow are fixed at the far end of the femur, the connecting rod is connected in the middle, the distance between the near end and the far end of the femur is adjusted through rotation of the connecting rod so as to reduce shortened fracture, and the length of the femur is maintained and controlled effectively. As a high-effectiveness device in clinical surgeries, the femoral fracture traction apparatus is simple in structure, convenient to use and capable of generating tremendous reduction power and solves the problem of reduction difficulty in femoral fracture surgeries.

The invention discloses an auxiliary reduction apparatus for closed reduction of femoral shaft fracture of children and belongs to the technical field of orthopedic medical treatment instruments, aiming to realize closed reduction of femoral shaft fracture of children. The technical scheme includes that a proximal clamp holder and a distal clamp holder reslectively sleeve a proximal connecting rodand a distal connecting rod through lock bolts; a Kirschner wire is fixedly connected with the proximal end of the femoral fracture through the proximal clamp holder; a half-thread wire is fixedly connected with the distal femoral condyle through the distal clamp holder; a horizontal rotating shaft is connected to the far end of the proximal connecting rod and is connected with a universal shaft;the universal shaft is connected with the distal connecting rod; an axial stretching reduction device is mounted at the tail end of the distal connecting rod, and a radial pressurizing reduction device is mounted on the distal connecting rod. The auxiliary reduction apparatus has the advantages of simple structure, convenience in use, good reduction effect, high convenience in fluoroscopy duringoperation, creates condition for driving of titanium elastic intrameduary nail for treatment of femoral shaft fracture of children, avoids the fracture broken end surgical reduction operation, and accordingly reduces surgical wounds.

The invention discloses an adjustable lower limb surgical position maintaining support frame which comprises a shank support plate, a thigh support plate, a footrest plate, a support rod and adjusting sleeves. The upper end of the shank support plate is hinged with the upper end of the thigh support plate, the footrest plate is perpendicularly arranged on the outer surface of the shank support plate, the multi-gear adjusting sleeves are arranged at intervals on the inner surface of the shank support plate and on the inner surface of the thigh support plate, and two ends of the support rod are correspondingly arranged inside the adjusting sleeves on the inner surface of the shank support plate and on the inner surface of the thigh support plate to adjust the angle between the shank support plate and the thigh support plate. According to the adjustable lower limb surgical position maintaining support frame, the position of the footrest plate can be adjusted to facilitate use by patients with different heights; and at the same time, due to the fact that the thigh support plate is arranged, for a patient with a femoral fracture, the fractured section can be effectively supported and be prevented from falling down, and therefore the adjustable lower limb surgical position maintaining support frame is good in surgical position maintaining effect and facilitates fracture reduction and maintenance.

The invention provides a hip joint correction and thighbone extender, consisting of a bone external fixation support, a steel needle fixation clamp connected to the bone external fixation support, and a steel needle clamped in the steel needle fixation clamp, wherein the bone external fixation support consists of a far side support and a near side support, the far side support comprises a far end hole C-shaped ring, a near end hole C-shaped ring arranged above the far end hole C-shaped ring, and a plurality of traction rods connected between the far end hole C-shaped ring and the near end hole C-shaped ring, and the near side support comprises one to two tubular connecting rods connected above the near end hole C-shaped ring, and an arc-shaped bow connected between the tubular connecting rods and the near end hole C-shaped ring. The hip joint correction and thighbone extender has three functions of hip joint correction, femoral fracture treatment and thighbone extension, meets the mechanics biological environment of truncation bone correction and fixation and thighbone slow extension, and is favorable for growth of new bones and function optimization and rebuilding during fracture healing and limb extension.

An interlocking intramedullary rod assembly for treating a fracture of a bone, said interlocking intramedullary rod assembly comprising:an intramedullary rod comprising a distal section and a proximal section;a distal interlocking screw; anda proximal interlocking screw;wherein said distal section of said intramedullary rod comprises a static distal seat for receiving said distal interlocking screw, and said proximal section of said intramedullary rod comprises a dynamic proximal seat for receiving said proximal interlocking screw;and further wherein said static distal seat is configured to secure said distal interlocking screw to said intramedullary rod such that said distal interlocking screw cannot move relative to said intramedullary rod, and said dynamic proximal seat is configured to secure said proximal interlocking screw to said interlocking rod such that a first end of said proximal interlocking screw cannot move relative to said intramedullary rod and the second end of said proximal interlocking screw can move relative to said intramedullary rod.

The invention discloses an intramedullary nail system for treating proximal femur fractures. The system comprises a main nail, a head nail and a supporting nail, the main nail is composed of a near end part, a transition part and a far end part, the head nail penetrates through a head nail hole channel located in the near end part, the supporting nail penetrates through a supporting nail hole channel located in the transition part, and the tail end of the supporting nail abuts against the lower side of the head nail; and the main nail, the head nail and the supporting nail form a triangular structure at the near end of the femur. The intramedullary nail system for treating proximal femur fractures is reasonable in structure, reduces symptoms such as femoral neck shortening, head and neck varus and even cutting caused by fracture part collapse due to postoperative load by using the principle of proximal triangular stabilization and pressurization, and is achieves a good treatment effect.

An interlocking intramedullary rod assembly for treating a fracture of a bone, the interlocking intramedullary rod assembly comprising: an intramedullary rod comprising a distal section and a proximal section; a distal interlocking screw comprising a distal end and a proximal end; and a proximal interlocking screw comprising a distal end and a proximal end; wherein the distal section of the intramedullary rod comprises a static distal seat for receiving the distal interlocking screw, and the proximal section of the intramedullary rod comprises a dynamic proximal seat for receiving the proximal interlocking screw; and further wherein the static distal seat is configured to secure the distal interlocking screw to the intramedullary rod such that the distal interlocking screw cannot move relative to the intramedullary rod, and the dynamic proximal seat is configured to secure the proximal interlocking screw to the intramedullary rod such that the angle between the distal end of the proximal interlocking screw and the proximal section of the intramedullary rod can be reduced but not increased. The proximal interlocking screw can provide dual plane compression at the fracture site, which includes linear compression at the fracture site and angular compression at the fracture site. The angular compression can be effected either during the surgery or after the surgery when the patient weightbears.

The invention belongs to the field of medical equipment, and particularly relates to an anti-rotation intramedullary nail system of a proximal femoral bionic arm reconstruction support. The anti-rotation intramedullary nail system comprises a main nail and a pressure nail, and is characterized by further comprising at least one tension nail, wherein the main nail, the pressure nail and the tensionnail form at least one triangular support structure, a near end section and a far end section of the main nail are integrally formed, the near end section is provided with a first nail hole and a second nail hole, the first nail hole fixes the tension nail, and the second nail hole fixes the pressure nail. The anti-rotation intramedullary nail system has the beneficial effects that the system isconsistent with anatomy of the femoral medullary cavity in a lateral position, the main nail of the side bent proximal femoral anti-rotation intramedullary nail can be lengthened even to the overall length of the femoral medullary cavity, and then the system can be used in femoral shaft fracture and multiple femoral fractures, thereby enlarging the use scope; the system effectively prevents the hip joint from inverting, femoral neck from shortening, femoral part from displacing inwardly, and femoral head and neck from rotating and deforming, an internal fixing device is prevented from breaking, loosing and releasing from the femoral neck internal fixing device, a power screw or a screw blade is prevented from cutting out, and femur stress fracture is prevented.

The invention relates to a fracture fixer, in particular to a combined single-side double-arm adjustable clamping bone pressurization fixer for multi-segmental femoral fracture and solves the problem that fracture is not easy to heal due to too big size, excess weight and poor flexibility of an existing external fixation support for fracture. The fixer comprises a pressure-adjustable retractable fixer and a plurality of steel nail fixing devices and is characterized by comprising a first supporting arm, a second supporting arm and a plurality of strengthening connection clamps, wherein the second supporting arm comprises a left arm body and a right arm body, the left arm body is embedded and inserted in the left side of the pressure-adjustable retractable fixer, the right arm body is embedded and inserted in the right side of the pressure-adjustable retractable fixer, the left arm body is connected with the first supporting arm through the strengthening connection clamps, the right arm body is connected with the first supporting arm through the strengthening connection clamps; the steel nail fixing devices are mounted on the first supporting arm or the second supporting arm. Steel nails can penetrate through each segment of the multi-segmental fractured femur for external fixation, bones on the fractured segments can be pressurized, physiological pressure stress on the femur is recovered, firm and stable external fixation can be realized through single-side double-arm locking, and the cure rate is increased.

The invention relates to a locking type artificial femoral stem, and belongs to the technical field of human body implantation materials. The locking type artificial femoral stem is composed of a femoral stem body and a neck part. The neck part is made to be at the upper end of the femoral stem body. The front side, the rear side, the inner side and the outer side of the femoral stem body are provided with a front side locking screw hole, a rear side locking screw hole, an inner side locking screw hole, an outer side locking screw hole and a transverse screw hole. The locking screw holes are all the semi-circular or circular screw holes or the semi-circular and circular combining screw holes. When the locking type artificial femoral stem is implanted into a femoral medullary cavity along a pre-set track, locking screws pass through the screw holes formed in the femoral stem body, and the locking type artificial femoral stem is locked at the close end of a femur, firm fixing of the artificial femoral stem and the femur can be achieved, the length of the artificial femoral stem cannot be too long, bone mass can be maintained more, the trauma, bleeding and the difficulty of the revision in the later period during operating can be lowered, the operating accuracy during the operating is increased, the fat embolism is lowered, and the risk of femur facture in the artificial femoral implanting process is lowered.

The invention discloses an artificial hip joint prosthesis handle for treating a periprosthetic fracture, and belongs to the technical field of orthopaedics medical apparatuses. The artificial hip joint prosthesis handle is used for treating the periprosthetic fracture generated after hip joint replacement. According to the technical scheme, a plurality of fixing holes are formed in the middle section and the distal end of the prosthesis handle and penetrate through the prosthesis handle from the outer side of the prosthesis handle to the inner side of the prosthesis handle, the length center lines of the fixing holes are perpendicular to the length direction of the prosthesis handle, and the multiple fixing holes are parallel. According to the artificial hip joint prosthesis handle, the fixing holes are reserved in the prosthesis handle, when the periprosthetic fracture generated after hip joint replacement is treated, a doctor can only use plate fixation, and cerclage wiring fixation is avoided. Steel plate fixing screws can penetrate through the reserved fixing holes to be fastened to an inner cortex and an outer cortex on the periphery of the femoral fracture, the good fixing effect is achieved, and mechanical stability is greatly improved. The artificial hip joint prosthesis handle is simple in structure and convenient to use; the fracture portion on the periphery of the prosthesis handle is stably and firmly fixed, the ideal operation effect is achieved, and recovery and functional recovery of a patient are quite facilitated.

The invention discloses an intramedullary nail special for children, which comprises a nail sleeve and a nail core, the far end of the nail core is provided with a first locking hole, the far end of the nail core is driven into the femoral marrow and penetrates through the growth plate at the lower end of the femur, a kirschner wire or a screw is driven at the epiphysis to enter the first locking hole to lock the nail core, the far end of the nail sleeve is driven into the femoral marrow from the greater trochanter at the proximal end of the femur to reach the metaphysis without passing through the growth plate, the nail sleeve is sleeved on the nail core, the near end part of the nail sleeve is arranged outside the femur, a second locking hole is formed in the nail sleeve, and a screw is screwed into the second locking hole through the skin to lock the nail sleeve. The intramedullary nail is applied to the distal femoral fracture of children, can be extended, prevented from rotating and locked, and can fix the fracture and retain the normal growth function of the growth plate.

The invention discloses a knife edge structure, a hip screw and a femoral fracture treatment device, the body of the knife edge structure has a hub-and-spoke type cross section, each hub-and-spoke type portion of the knife edge structure comprises at least one knife groove and knife blades formed at tops of two side walls of the knife groove, and projections of tops of the knife blades are disposed in the bottom of the knife groove. The knife edge structure has a special structure with a small opening and a large cavity, the problem that a fixed position is not stable due to the fact that rotation easily occurs can be prevented, position of the femoral fracture treatment device having the hip screw with the knife edge structure can be durable during a long-term use process, and the bone can be properly healed.

The invention belongs to the field of medical apparatus and instruments and discloses a guider for fixing dynamic hip screws for proximal femoral fractures. A base plate is arranged at one end of the guider; a connection post is connected to the base plate; a handle is arranged at one end of the connection post; a plurality of parallel needle guide tubes are connected to the base plate and the connection post; needle guide holes are formed in two ends of the needle guide tubes and opened on the base plate and the connection post. When using, a guide needle is drilled into an optional needle guide hole firstly and then the required needle guide holes are selected according to the actual requirement. The guider is simple in structure, accurate and reliable in guide and location, good in use effect and capable of shortening operation time and reducing hemorrhage during operation and medical X-ray radiation.

The invention discloses a nested structure for reduction of femoral neck fractures. The nested structure comprises a sleeve and a first screw; the diameter of the first screw is matched with that of the sleeve; the tail of the first screw is arranged in the sleeve; the head of the first screw is of a threaded structure; the sleeve is composed of a sleeve head, a sleeve middle and a sleeve bottom;the sleeve middle is in double-headed thread arrangement; the sleeve bottom is of a hollow prism structure with a hexagonal outer edge and a circular inner edge. The nested structure is simple and flexible in structure; the problem of poor anti-rotation capability of a traditional DHS can be effectively solved; the production and use cost is low, and the large-scale application and popularizationare facilitated.

The invention provides a fixing system used for femoral fracture. The system comprises an intramedullary nail, a femoral fixing assembly and a connecting assembly. The above intramedullary nail further contains an upper part, a lower part, a hollow pipeline and an oblique channel. The femoral fixing assembly penetrates through the oblique channel and further contains a front part and a back part, both of which are integrally formed. The connecting assembly is arranged in the upper part of the intramedullary nail and contains a locking unit and a fixing unit. The locking unit is embedded on the fixing unit and pushes the fixing unit such that the fixing unit is joined with the back part of the femoral fixing assembly.

The embodiment of the invention relates to an assembled anatomical proximal femoral fracture intramedullary fixing device which comprises a proximal intramedullary nail, a proximal locking nail and adistal locking nail; the proximal intramedullary nail is of a rod-shaped structure and comprises a first fixing part, a transition part and a second fixing part; the proximal locking nail comprises atool bit, a connecting part and a sleeve; the shape of the proximal locking nail is matched with that of a second locking nail hole. The design of the appearances and the abduction angles of the firstfixing part and the transition part of the proximal femur intramedullary nail provided by the embodiment of the invention has extremely high matching degree with a proximal femur medullary cavity, different diameters and lengths can be selected, the intramedullary nail proximal part design avoids protruding out of the vertex of the greater trochanter, the distal forked structure design reduces the risk of stress fracture, and the proximal locking nail is provided with spiral blades with different lengths and central locking structures with different lengths, so that better restoration and more effective fixation between fracture ends are realized.

The invention provides an auxiliary resetting internal fixing device for femoral neck fracture. An internal fixing device body is at least provided with an arc fitting part matched with the inner sideof the femoral neck and used for auxiliary resetting and a fixing supporting part for fitting the far end of the fracture. The internal fixing device is characterized in that the internal fixing device body further comprises a tip arranged at the top of the arc fitting part and used for controlling the near end of the fracture to rotate. The auxiliary resetting internal fixing device for femoralneck fracture has the advantages of being simple in structure, easy and flexible to operate and the like. The problem is effectively solved that the shear force of the fracture part exists in the traditional surgery, the surgery time and recovery time are shortened, and the device has good social and economic benefits.

The invention discloses a proximal femoral fracture repair auxiliary combination device and auxiliary components thereof. The auxiliary combination device comprises a first auxiliary component, a channel generating element, a second auxiliary component, a spiral push rod and a third auxiliary device. The first auxiliary component is arranged on a specific position of a femur, one end of the first auxiliary component is formed with two penetrating-prevention plate guiding ports and a guiding needle guiding port for a guiding needle to pass through, and the two penetrating-prevention plate guiding ports are arranged at two sides of the guiding needle guiding port. The channel generating element forms two penetrating-prevention plate channels through the two penetrating-prevention plate guiding ports. The second auxiliary component sleeves the spiral push rod, the spiral push rod drives the second auxiliary component and a side bone plate, the side bone plate also sleeves the spiral push rod, and is close to the other end of the second auxiliary component. The third auxiliary device applies force to the two penetrating-prevention plates. Through an integrated instrument design, the proximal femoral fracture repair auxiliary combination device can be implemented and applied to a screw structure with penetrating-prevention plates simply, the implementing time can be greatly saved, and the patient's burden can be effectively reduced.

The invention provides an inside support structure for a medullary cavity suitable for strengthening internal fixation for a proximal femoral fracture. The inside support structure comprises a fixingplate, wherein at least two screw holes are formed in the fixing plate and are in a design of locking screw holes; the fixing plate is arranged inside a femoral medullary cavity and is attached to theinner side surface of a thigh bone; the fixing plate is fixed on the thigh bone through screws screwed in the screw holes; the inner side surface is one surface close to the inside of a human thigh;and unicortical or biocortical fixation can be carried out on medial cortex of the thigh bone. The problems that existing internal fixation for the proximal femoral fracture is insufficient in strength and poor in stability are solved. The inside support structure for the medullary cavity belongs to the technical field of intertrochanteric fracture repair.

The invention discloses a fracture type classification method and a fracture identification model construction method, and the method comprises a simple fracture A type, a wedge-shaped fracture B type, and a complex fracture C type. The simple fracture A type comprises a simple spiral fracture A1, a simple oblique fracture A2 and a simple transverse fracture A3; the wedge-shaped fracture B type comprises a spiral wedge-shaped fracture B1, a bent wedge-shaped fracture B2 and a crushed wedge-shaped fracture B3; the complex fracture C type comprises a complex spiral fracture C1, a complex multi-section fracture C2 and a complex irregular fracture C3. The method has the advantages that accurate classification of the femoral fractures is helpful for accurate operation strategies and better postoperative prognosis, and an effective and accurate femoral fracture diagnosis and typing system plays an important role in clinical work.