86 results about "Intertrochanteric fracture" patented technology

A modification to the prototypical compression (dynamic or sliding) hip screw is described which expands the utility and surgical indications of this frequently used fracture fixation device to include the fracture pattern commonly referred to as a “reverse obliquity fracture” of the proximal femur. This fracture pattern is poorly secured with current generation hip screws, frequently necessitating the use of intramedulary fracture fixation devices or external fixation hardware. The described modification blocks telescopic sliding of the femoral head lag screw within the cylindrical barrel of the side plate and allows for secure locking of the lag screw within the side plate, preventing any relative motion between the screw and plate once fracture reduction has been achieved. In a locked mode, the proximal fracture fragment(s) is prevented from displacing laterally relative to the distal (diaphysial) fragment, as occurs commonly when a reverse obliquity fracture or a comminuted intertrochanteric femur fracture is fixed with a conventional hip screw. No change in routine fracture reduction or insertion technique is required to use the Locking Compression Hip Screw. Additionally, the described modification does not preclude use of the Locking Compression Hip Screw in a dynamic or sliding mode, if desired, when used to fix the more common femoral neck or intertrochanteric fracture patterns.

The invention provides a proximal femoral anti-rotation locking device, which comprises a bone setting plate and a locking screw, wherein one end of the bone setting plate is a head part, the other end of the bone setting plate is a rod part, the head part is pasted with the greater trochanter, the rod part is pasted with the outer side of the thighbone, the head part is provided with five head threaded locking holes and two needle guide holes, the five head threaded locking holes respectively allow five locking screws extending into the greater trochanter, the femoral neck and the femoral calcar to be arranged on the head of the bone setting plate in a crossed way, the axial line direction of the five head threaded locking holes respectively forms an included angle with the plane and the vertical surface of the bone setting plate plane, through the axial line space, the inserted screws cannot mutually touch each other, and three lower locking screws in the five are crossed with the two upper locking screws. The proximal femoral anti-rotation locking device has the advantages that the locking screw looseness and the bone fracture setting loss can be effectively avoided, and the coxa vara malformation and the like are prevented; in addition, the application range is wide, and the proximal femoral anti-rotation locking device is applicable to instability, thrypsis, osteoporosis and intertrochanteric fracture in the old; finally, the proximal femoral anti-rotation locking device conforms to the proximal femoral anatomical structures, the pasting effect is good, the direction of the locking screws is relatively fixed, and the operation is convenient.

The invention relates to an intertrochanteric arc-shaped bone fracture plate, and belongs to the technical field of human in-vivo implantation materials. The intertrochanteric arc-shaped bone fracture plate is composed of a main plate and an arc-shaped plate, the arc-shaped plate is manufactured on one side of the main plate, the main plate and the arc-shaped plate are connected as a whole through a connecting arc face, locking holes are formed in the main plate and the arc-shaped plate, and the bone fracture plate and the thighbone are attached and fixed through screws. A hollowed-out structure is formed in the middle of the arc-shaped plate. The arc-shaped plate is added to one side of the main plate, semi-wrapping attachment supporting and fixing can be carried out on the thighbone, the fracture reduction effect and supporting force of the inner rear side of an intertrochanteric fracture and the firmness of the main plate are improved, and more than eight locking holes fixed to the whirlbone through the femur neck are provided to be selected. The application range is wide, the intertrochanteric arc-shaped bone fracture plate can be used for all stable and unstable intertrochanteric and subtrochanteric fractures, inside calcar femorale and lesser trochanter splintered fractures and femur neck fractures, the risks of coxa vara, nail breakage and plate breakage are effectively reduced, the treatment effect is improved, mounting is easy and convenient, and use is safe and stable.

The invention relates to a bone fracture plate with an arc-shaped plate, and belongs to the technical field of human body internal implantation materials. The bone fracture plate is formed by a main plate and the arc-shaped plate, the arc-shaped plate is manufactured on one side of the main plate, the main plate and the arc-shaped plate are in circular arc transition to form a whole, locking holes are formed in the main plate and the arc-shaped plate, a hollowed structure is formed in the middle of the arc-shaped plate, and the main plate and the arc-shaped plate are in circular arc transition to form the whole and fixedly attached to the thighbone through locking nails. According to the bone fracture plate, the arc-shaped plate is additionally arranged on one side of the original main plate, the thighbone can be supported and fixed in a semi-wrapped and attached mode, and the bone fracture reduction effect and the supporting intensity on the inner side of an intertrochanteric fracture and the firmness of the main plate are improved. The bone fracture plate is wide in application range and can be used for all the stable and unstable intertrochanteric and below-trochanter fractures and splintered fractures of inner-side thighbone calcars and lesser trochanters, the risks of coxa vara, nail breaking and plate breaking are effectively reduced, complications are reduced to the greatest extent, the treatment effect improved, and the bone fracture plate is easy and convenient to install and safe and stable in use.

The invention discloses an in-vitro dynamic hip screw guider comprising guide needle cannulas and a guide block. The guide block is provided with a bottom edge and guide edges. The bottom edge is provided with two parallel puncture needles. The bottom edge is provided with a plurality of guide needle holes parallel to the guide edges. The guide needle cannulas are inserted into the guide needle holes. With the in-vitro dynamic hip screw guider, the positioning operation in needle passing and fixation for femoral intertrochanteric fracture and femoral neck fracture is simplified, a needle feeding point can be positioned quickly and accurately, and the needle feeding angle can be kept quickly and accurately; the guider has the advantages of avoidance of heavy wound, high cost, radiation and the like; through using the guider, the number of photographing or raying times is reduced, surgical time is shortened, surgical bleeding is less, and patients feel less pain; in addition, the guider guarantees safety and reliability of operation and is simple in structure, easy to disassemble, convenient to carry, economical, practical and suitable for final popularization and application.

The invention relates to a fracture three-dimensionally-intersecting-connecting-locking internal fixing device. The fracture three-dimensionally-intersecting-connecting-locking internal fixing device is characterized by including the distal-femur fracture three-dimensionally-intersecting-connecting-locking internal fixing device, the proximal-humeral fracture three-dimensionally-intersecting-connecting-locking internal fixing device, the femoral-intertrochanteric fracture three-dimensionally-intersecting-connecting-locking internal fixing device, the femur-neck and proximal-femoral fracture connecting-locking internal fixing device, the backbone intersecting and locking internal fixing device and the backbone sliding-chute locking internal fixing device in a three-dimensionally intersecting, connecting and locking mode. According to the fracture three-dimensionally-intersecting-connecting-locking internal fixing device, the space structure which has the three-dimensional rotation resisting effect and the introversion resisting effect and is optimal and most stable for distal femur fractures is formed; the internal fixing device is tightly attached to the femur inner-side fracture line through high-strength slant cotter pins, the continuity of cortexes of bone is rebuilt to achieve strong spanning supporting, introversion shifting of fractures is effectively prevented, and static force stabilization in structural mechanics is achieved; as locking pins span the two ends of the fracture line to resist bending stress firstly, part of the stress is borne by screws, and the world problem that due to stress concentration of AO locking plates for backbone fractures, proximal femoral fractures, distal femur fractures and proximal humeral fractures, plate breaking often occurs is solved in structure and biomechanics.

The invention discloses a femoral intertrochanteric fracture double-sleeve type osteosynthesis device. The femoral intertrochanteric fracture double-sleeve type osteosynthesis device comprises an osteosynthesis plate, double-sleeve nails and a plurality of locking screws. The osteosynthesis plate is matched with the outer side of the femoral neck end in shape and the width and the thickness of the osteosynthesis plate decrease from top to bottom. The upper portion and the lower portion of the osteosynthesis plate are provided with a plurality of threaded locking holes and the middle portion of the osteosynthesis plate is fixedly connected to two sleeves. The double-sleeve nails comprise two half-threaded empty nails and the tail ends of the two half-threaded empty nails are sleeved in the two sleeves of the osteosynthesis plate. The locking screws are used for fixing the osteosynthesis to a femur through the locking holes. When the femoral intertrochanteric fracture double-sleeve type osteosynthesis device is used clinically, the two half-threaded empty nails are screwed along a guide needle, the sleeves sleeve the tail ends of the half-threaded empty nails, the upper portion of the osteosynthesis plate is fixed to a femoral greater trochanter with 3 or 4 locking screws, and the lower portion of the osteosynthesis plate is fixed to a femoral shaft. The femoral intertrochanteric fracture double-sleeve type osteosynthesis device can reduce the fracture line, improves stability and is quick in healing and suitable for diversity femoral neck fracture repair.

The invention discloses minimally invasive irreducible syn-intertrochanteric fracture reduction forceps. The minimally invasive irreducible syn-intertrochanteric fracture reduction forceps comprise two reduction arms, wherein the two reduction arms are hinged together in a detachable manner through a hinging assembly, each reduction arm comprises a forceps body and a pressurizing arm arranged at two sides of the hinging assembly, and a clamping groove is arranged at one side, facing the forceps body of the other reduction arm, of each reduction arm. The minimally invasive irreducible syn-intertrochanteric fracture reduction forceps are simple in structure, easy to manufacture, convenient and rapid to use, and high in efficiency, when the minimally invasive irreducible syn-intertrochanteric fracture reduction forceps are used, the length of a surgical incision does not need to be increased, and the injuries to the deep soft tissue can not be increased.

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 discloses a bone connecting device for treating femoral intertrochanteric fracture. The bone connecting device for treating femoral intertrochanteric fracture comprises a bone connecting plate, a circular knife and fixing screws, wherein the bone connecting plate comprises a bone connecting plate upper portion, a bone connecting plate middle portion and a bone connecting plate lower portion which are sequentially connected to one another; the bone connecting plate upper portion is arc-shaped; the bone connecting plate middle portion is obliquely arranged at the lower end of the bone connecting plate upper portion; the outer side of the bone connecting plate middle portion and the outer side of the bone connecting plate lower portion are straight; the bone connecting plate middle portion is thicker than the bone connecting plate upper portion and the bone connecting plate lower portion; a sleeve is arranged on the bone connecting plate middle portion; threads are arranged at the front end of the circular knife; and the rear of the circular knife does not have threads. When the bone connecting device is used, the circular knife is obliquely placed in a femoral head via a femoral neck from a greater trochanter, the threads of the circular knife are fixed in the femoral head, and the rear of the circular knife is slidably connected with the femoral neck and the sleeve; and the bone connecting plate upper portion and the bone connecting plate lower portion are provided with locking screw holes which are locked with the fixing screws in a threaded manner. By the mode, a fracture portion can be compressed, and a fracture line is reduced; and angular stability is high, displacement fracture can be prevented, injury is reduced, and healing on femoral intertrochanteric fracture is facilitated.

The invention relates to a proximal femur intramedullary nail system. The proximal femur intramedullary nail system comprises a main nail, transverse locking nails, a lag screw and a proximal femur outer side wall protection plate; the near end of the main nail is provided with a first screw hole used for placing a lag screw, a second screw hole located at the near end of the first screw hole and a third screw hole located at the far end of the first screw hole; the second screw hole is used for receiving the transverse locking nail for fixing a bone block on the outer side wall; the third screw hole is used for receiving the transverse locking nail for fixing a bone block on the inner side wall; the lag screw is located in the first screw hole, and the head of a screw body of the lag screw is provided with a threaded part; the proximal femur outer side wall protection plate is arranged on the proximal femur outer side wall and fixed to the proximal femur through the lag screw and the at least one transverse lock nail, and the problem that the failure probability of existing intertrochanteric fracture internal fixation is relatively high is solved.

The invention discloses a computer-assistant femoral intertrochanteric fracture positional and alignment semi-automatic restoration method including: 1) with the broken bone three-dimensional model generated by a CT image as an information input source, extracting the geometric information and topologic relationship of the three-dimensional network model; 2) extracting the fracture surface and related force lines of caput femoris and femoral shaft; 3) determining a restoration position required in clinical medicine by means of a positional-alignment iteration method to complete the semi-automatic restoration of the intertrochanteric fracture. In the invention, on the basis of basic requirement on the closed reduction of the femoral intertrochanteric fracture, medical requirement on the broken bone joint is satisfied; then by means of positional-alignment iteration for calculation, preoperative planning demand of medical personnel is satisfied and working efficiency is increased just through a less amount of human-computer interaction.

The invention discloses an external fixing and locking nail plate system for treating femoral intertrochanteric fracture. The system comprises a thighbone locking plate, wherein a shape similar to the shape of the skin on the outer side of the hip of a human body is formed on the inner surface of the thighbone locking plate; an upper main locking hole, a lower main locking hole, an upper sub locking hole, a lower sub locking hole, an upper main locking screw, a lower main locking screw, an upper sub locking screw, a lower sub locking screw and a lower locking screw are formed on the thighbone locking plate; the upper main locking hole, the lower main locking hole, the upper sub locking hole and the lower sub locking hole are provided with internal screw threads and countersunk heads; the upper main locking screw, the lower main locking screw, the upper sub locking screw, the lower sub locking screw and the lower locking screw are provided with first threaded parts, second threaded parts and smooth screw rods; and the second threaded parts of the upper main locking screw, the lower main locking screw, the upper sub locking screw and the lower sub locking screw are coarse threads. The system is arranged on the outer side of the human body and is good in fixing effect. After surgery, a patient can conveniently wear trousers, nursing is convenient to perform, the operation wound is small, the surgery cost is low, and the system can be taken out through outpatient service after the fracture is healed and is particularly suitable for patients with poor cardio-pulmonary function.

The invention relates to the field of medical devices, in particular to a dynamic hip device for a femoral intertrochanteric fracture minimally invasive surgery. The dynamic hip device comprises a sliding screw, a sliding steel plate and a compression screw. The sliding steel plate is provided with a sleeve, and the sliding screw penetrates the sleeve to be fixedly connected with the compression screw. The dynamic hip device further comprises a drill jig handle, and the drill jig handle is detachably connected with one end of the sleeve of the sliding steel plate. Compared with the prior art, the dynamic hip device is applied to the femoral intertrochanteric fracture minimally invasive surgery, the operation is simpler and faster, the positioning is accurate, the length of an incision is greatly reduced compared with when an original wide exposure mode is adopted, the soft tissue injury is small, the bleeding is less, the operation speed is quick, and the operation risk is reduced.

The invention discloses an auxiliary device for intramedullary fixation of femoral intertrochanteric fracture. The auxiliary device comprises a fixation bone plate; the proximal end of the fixation bone plate is provided with a first connecting part for connecting a greater trochanter; the distal end of the fixation bone plate is provided with a second connecting part for connecting a femoral shaft; the fixation bone plate is provided with a sliding hole corresponding to a fracture intramedullary fixation device; and one end of a connecting piece passes through the sliding hole and is connected with the fracture intramedullary fixation device, wherein the boundary dimension of the other end of the connecting piece is larger than that of the sliding hole. According to the invention, the fixation bone plate and the fracture intramedullary fixation device can be connected into a whole, so that reconstruction of a femoral proximal outer side wall and the internal intramedullary fixation can be integrated, firm fixation of the greater trochanter can be realized, and failure of the intramedullary fixing device can be effectively avoided.

The invention relates to a combined splint internal fixation device for a femoral intertrochanteric fracture and solves the problem that an internal fixation device in the prior art cannot provide strong and biomechanical fixation for the proximal end of femurs. The device is mainly characterized in that an inside distance bone plate is added, a clamping structure that the inside distance bone plate and an outside bone plate are respectively arranged on the inner side and outer side of the femur and clamp the proximal end of the femur is adopted, and the inside distance bone plate is fixed after the external distance bone plate is implanted with screws. Correspondingly, the invention also designs auxiliary aiming apparatus for proper matching use. The auxiliary aiming apparatus is providedwith two clamping claws which can be used for fixing and clamping the inside distance bone plate and the outside bone plate respectively, and screw holes of the inside distance bone plate and the outside bone plate are always kept in concentric positions. The device has the beneficial effect that absolutely stable inside fixation of the inner side and the outer side of the proximal end of the femur can be provided simultaneously, and shear resistance and rotation resistance are high. Besides, the device is simple in design structure and has certain universality with some parts of the existinginternal fixation system.

The invention provides an internal fixation device for treating complex intertrochanteric fractures and an application method thereof, the device comprising a femoral shaft intramedullary main nail, afemoral neck main screw, a lateral steel plate, a femoral neck locking hollow nail, a distal main nail locking nail and a steel plate fixation screw, wherein the femoral shaft intramedullary main nail is inserted into a medullary cavity; the lateral plate is attached to the restored lateral wall of the great tuberosity. At least one femoral neck loc hollow nail is inserted and fix into that femoral head through the first locking hole. The head end of the femoral neck main screw is inserted into the femoral head through the femoral neck after pas through the sliding hole on the middle part ofthe lateral plate and the first lateral hole on the upper part of the femoral shaft main nail. The invention is used for internal fixation treatment of complex intertrochanteric fractures, has the advantages of good internal fixation effect, stability and less failure of internal fixation, and is particularly suitable for complex intertrochanteric fractures with comminuted lateral wall of great trochanter.

Disclosed is a steel wire guiding device for an intertrochanteric fracture. A first inserting hole which allows a main guiding catheter to be inserted and a second inserting hole which allows an auxiliary guiding catheter to be inserted are formed in a handle, the near end of the main guiding catheter and the near end of the auxiliary guiding catheter are respectively in inserted connection with the handle, the far end of the main guiding catheter is in a hook shape and hooks small trochanteric fracture blocks in a sleeved mode, the far end of the main guiding catheter and the far end of the auxiliary guiding catheter are connected, and therefore a bent channel which guides a steel wire to be wound around the position of the intertrochanteric fracture is formed. A hole which allows a steel wire ejection position to penetrate is formed in one side of the main guiding catheter, a gap which allows the steel wire to pull away is formed in the other side of the main guiding catheter, the handle is further connected with a pushing mechanism, the pushing mechanism comprises a pushing rod which is inserted in the handle, a screw rod which is in threaded connection with the handle is arranged at the tail end of the pushing rod, and the fracture position is jointly fixed by the main guiding catheter and the pushing mechanism. A combined type guide steel wire or a titanium cable and a device for temporarily fixing the fracture are adopted, the tissue is rarely damaged, fracture healing is facilitated, minimally-invasive operation is achieved, use is convenient, and the operation is easy, convenient and reliable.

The invention provides a clover titanium plate fixing structure and method of a femoral intertrochanteric fracture. The structure comprises a clover titanium plate and a single leather screw. The clover titanium plate comprises an upper part and a lower part. When an femoral intertrochanteric fracture prothesis replacement operation is carried out, the clover titanium plate and the single leather screw are used for fixing the fracture at the upper end of the femur, according to the structural shape of the upper portion of the clover titanium plate, three blades are arranged in three directions respectively, and the blades are provided with a plurality of screw fixation holes. The bending-resistant, rotation-resistant and shearing-resistant functions of the fixing structure obviously exceed those of a steel wire kirschner wire, a reference point of the femoral head rotation center and the eccentric distance during prosthesis implantation is restored, postoperative limb length balance is guaranteed, tension of the gluteus medius is effectively restored, and normal functions of postoperative hip joints are guaranteed.

The invention belongs to the technical field of medical appliances and particularly relates to a memory pressurization hip lag screw system. The system comprises a memory pressurization hip lag screw, a hip lag screw sleeve and a lateral pressurization steel plate, wherein the memory pressurization hip lag screw is divided into a head part, a body part and a tail part, the front side of the head part is in a forky semicircular structure with screw threads, the side surface of the head part is in a spindle shape with screw threads and the head part forms an included angle being 135 to 150 degrees with the body part, the body part is in a hollow cylinder shape, and the tail part is in a cylinder shape provided with a hollow inner cavity and screw threads. The memory pressurization hip lag screw system can be used for old femur intertrochanteric fracture fixing, the rotation, pulling-out and cutting-out stress can be effectively resisted, the stability of the fracture end is enhanced, and the fracture healing is favorably realized. The memory pressurization hip lag screw system has the advantages that the operation is simple, the popularization is convenient, and the system can be implemented in any hospital.

The invention discloses a minimally invasive reducer for femoral intertrochanteric, wherein the lateral clip rests on the lateral side of the proximal femur and the medial clip rests on the bone cortex of the medial side of the proximal femoral intertrochanteric fracture block, and the two clips are lifted to completely close the fracture block, thereby facilitating the next step of fixation; thetwo clamps are respectively slidably fitted on the main arm and the main arm of the plier-shaped mechanism, and the two main arms are hinged together at about the middle position, and the clamps are arbitrarily fixed in the sliding groove of the head of the main arm by bolts; and the chuck is connected with the main arm through a rotating joint, wherein the chuck can be arbitrarily fixed in a sliding groove of the rotating joint through bolts, and the rotating joint is also fixed on the main arm through bolts. A locking mechanism is added to the rear part of the pliers mechanism, so that the clamping position of the chuck and the clamping force can be locked by fixing the relative positions of the two main arms. The whole mechanism has the advantages of simple structure, low cost and strong practicability.

An targeting device for intertrochanteric fracture includes a handle portion and an insertion portion to define an included angle; a protruding portion being formed at a free end of the insertion portion; a through hole being provided on the insertion portion at where closer to its center; the insertion portion being placed into a neck of the femur at where closer to its center; a guide wire being inserted via the through hole for the targeting device to fast and accurately achieve the central fixation at a head of the femur thus to match the femur and the neck of the femur for facilitating subsequent processes of drilling and placement of a dynamic hip screw to firmly secure the femur where the fracture takes place.

The invention provides a multifunctional bedside abduction traction frame. The multifunctional bedside abduction traction frame comprises a clamping part, a cross bar and a vertical bar, wherein the clamping part comprises a first clamping block, a second clamping block, clamping screws, rotary rods, a first connecting piece and a first fixing screw; the cross bar comprises a cross bar body, a pulley, a first gasket and a first locking nut; the vertical bar comprises a vertical bar body, an upper gear, a lower gear, a second gasket, a second locking nut, a cross bar connecting piece, a cross bar fixing screw and a rotary rod; for the vertical bar, the lower gear is fixed to the upper end of the vertical bar body, and the upper gear covers the lower gear and is meshed with the lower gear; the second gasket and the second locking nut are arranged and locked above the upper gear, so that a transverse angle of the cross bar is fixed after adjustment; the cross bar connecting piece is transversely and fixedly connected with the outer side of the upper gear, and a cross bar through hole penetrating through the cross bar body is formed in the cross bar connecting piece; the rotary rod is arranged at one end of the cross bar fixing screw in a matched manner, and the other end of the cross bar fixing screw is screwed into the cross bar connecting piece for fixing the cross bar. The multifunctional bedside abduction traction frame can adjust traction height, abduction degree and rotating degree conveniently, has a large adjustable range, is fitted for patients with different femoral neck and intertrochanteric fracture types, and is easy to assemble and disassemble.

The invention discloses an implanting device for a femoral intertrochanteric fracture conformal nail, which comprises a positioning handle and a kirschner wire calibration rod; the positioning handle is connected with the upper end of an intramedullary nail through an intramedullary nail connecting rod at the upper end of the positioning handle; a pull nail drill sleeve, an anti-rotation locking nail guide hole and a pressure nail drill sleeve are sequentially arranged on the positioning handle from top to bottom; a kirschner wire guide sleeve is sleeved with the pressure nail drill sleeve; a kirschner wire for guiding a pressure nail to be implanted into a bone is driven into a femoral head through the kirschner wire guide sleeve and a pressure nail hole in the intramedullary nail; the kirschner wire calibration rod penetrates through a through hole in the intramedullary nail connecting rod and is matched with the intramedullary nail connecting rod through threads; and the lower end of the kirschner wire calibration rod is inserted into the centre hole of the intramedullary nail and abuts against the kirschner wire driven into the pressure nail hole. According to the invention, the kirschner wire calibration rod is used for preventing the kirschner wire from shifting upwards when the kirschner wire is driven into a cortical bone; it can be guaranteed that the pressure nail is smoothly implanted into the bone according to the preset direction under the guidance of the kirschner wire; and therefore, the operation quality and the treatment effect are improved.

The invention relates to a memory alloy greater trochanter embracing fixator which comprises a main reinforcement, wherein the main reinforcement is made of a NiTi shape memory alloy plate, the plate surfaces of the main reinforcement are positioned in the left and right vertical directions, the bottom end of the left side edge of the main reinforcement is connected with the right end of a left embracing arm made of the NiTi shape memory alloy plate into a whole, the plate surfaces of the left embracing arm are positioned in the left and right vertical directions, the left embracing arm protrudes towards the upper left, a plurality of left anti-skid disengaging teeth made of the NiTi shape memory alloy plate are uniformly distributed on the side edge of top of the left embracing arm, the plate surfaces of the plurality of left anti-skid disengaging teeth are positioned in the left and right vertical directions, and the bottom side edges of the plurality of left anti-skid disengaging teeth are connected with the side edge of top of the left embracing arm into a whole. The invention aims to provide the memory alloy greater trochanter embracing fixator which has the advantages that a greater trochanter can be reliably and effectively held and fixed, an incision does not need to be excessively extended during an operation, the operation time can be shortened, the amount of bleeding is reduced, the operation is simple and convenient, and a greater trochanter steel plate used in existing hip replacement of patients with intertrochanteric fractures can be effectively replaced.

The invention discloses an irreducible intertrochanteric fracture reduction holding device, and relates to the field of medical apparatus and instruments. The holding device comprises a holding clampprovided with a limit plate adjusting the opening and closing degree, a top pressure mechanism which comprises a fixed rod perpendicular to the holding clamp, a jacking mechanism which comprises a link mechanism capable of changing the height of the link mechanism by rotating an adjusting rod, wherein a bowl-shaped connecting frame provided with connecting holes is arranged on the fixed rod, and athreaded rod is inserted into the connecting frame through any connecting hole. The holding device can be mechanically fixed at the distal end, a required incision at the fracture end is very small,blood supply cannot be destroyed, the position of a top pressure rod can be adjusted freely to cooperate with the jacking mechanism capable of adjusting the support height below the limbs, and then the device adapts to the phenomenon that cocked stone stubble reaches the best compression state.

The invention relates to an intertrochanteric fracture intramedullary fixation system, comprising: an intramedullary nail, a proximal tension locking nail and a distal locking nail; the intramedullary nail comprises a proximal end and a distal end provided with a first hole and a second hole respectively; the proximal tension locking nail penetrates through the first hole, with the front end entering the femoral head and the tail end fixed to the intramedullary nail through a fixing part; the distal locking nail is fixed to the intramedullary nail through the second hole; the tail end of the distal tension locking nail is a releasable mounting tool and a pressure tool, the pressure tool is of hollow structure, the inner wall of the pressure tool is in threaded connection with the proximal tension locking nail. Compared with the prior art, the intertrochanteric fracture intramedullary fixation system integrates the advantages in both an intramedullary nail and a locking steel plate, marrow expanding is not required, surgical time is effectively shortened, disturbances on the medullary cavity are significantly reduced, intraoperative and postoperative hemorrhage is greatly reduced, auxiliary structures such as an anti-rotation nail are not required, surgical time is further shortened, and the system is more suitable for Chinese people to use.

An intertrochanteric fracture fixing apparatus, belongs to the medical appliance field. At present the sheet type external fixator of the intertrochanteric fracture is difficult to enclasp the bones of the patients because of the self elasticity, which is a puzzle in the surgery and made of the innocuous memory alloy sheet material. The bone of the patients is exposed according to the general method in the surgery, after the reset process, the fixing apparatus is selected having the outline size smaller than the bone of the patients about 10%, then dips in the cool brine of 0-5 DEG for 3-5 minutes after antisepsis and is extracted, which is fast blocked on the diaplastic bone of the patients, then foments the fixing apparatus using the disinfectant brine gauze of 45 DEG, and makes a quick recovery to enclasp the bone of the patient. The operation is convenient, and the fixing apparatus is used to enclasp the bone of the patient, which is beneficial to the healing.

The invention discloses an internal fixation device for a femoral intertrochanteric fracture. The device comprises an intramedullary main nail, a near-end locking nail and a far-end locking nail, a first through hole is formed in the near end of the intramedullary main nail, a preset included angle is formed between the axis of the first through hole and the axis of the near end, and a second through hole is formed in the far end of the intramedullary main nail; the near-end locking nail penetrates through the first through hole, and one end of the near-end locking nail can be fixedly clampedinto the caput femoris through an expandable mode; the far-end locking nail penetrates through the second through hole. According to the internal fixation device for the femoral intertrochanteric fracture, one end of the near-end locking nail can be fixedly clamped into the caput femoris through the expandable mode, in this way, fixation of the near-end locking nail is firmer and more reliable, and the stability is better; fixation is conducted through an expansion mode, the expansion degree can be adjusted according to the degree of osteoporosis, then the fixation effect is achieved, and in addition, the device is convenient to operate.