CN112353475A - Femoral trochanter region fracture fixing device - Google Patents

Abstract

The invention discloses a femoral trochanter region fracture fixation device, which comprises an intramedullary nail, a plurality of blades and a core rod, wherein a rod through hole is arranged at the near end of the intramedullary nail, a positioning groove is arranged at the peripheral edge of the rod through hole, each blade comprises a blade head convex edge part positioned at the head end of the outer side edge, the blade head convex edge parts are radially matched and clamped on the inner wall of a convex ridge part of an inner cavity of a femoral neck, a blade tail at the tail end of each blade is matched and clamped in the corresponding positioning groove at the peripheral edge of the rod through hole, the core rod penetrates through and is sleeved in the rod through hole, the inner end of the core rod is used. Knife grooves are axially distributed on the outer side of the core rod, and each knife groove is used for matching and sleeving the knife back of the corresponding blade. The intramedullary nail is fixed with the tail ends of the blades, and the blades and the mandrel are supported on the inner wall of the convex ridge part of the inner cavity of the femoral neck, so that a firm supporting constraint relation is formed.

Description

Femoral trochanter region fracture fixing device

Technical Field

The invention belongs to the technical field of reduction fixing devices for femoral neck fracture, and particularly relates to a femoral neck fracture fixing device.

Background

Fractures of the neck and tuberosity of the femur are common frequently encountered diseases of the old. When the femoral neck fracture or intertrochanteric fracture is fixed by a screw and nail plate system, the traditional internal fixation method for the femoral neck fracture is many, and joint replacement is often finally performed due to difficult operation and many complications. The femur neck has special anatomical structure, a shaft angle and an anteversion angle on different planes, and the position is deep and hidden, so that the positioning guide pin is difficult to be correctly placed. When the internal fixation is used for treating the fracture of the femoral neck and the femoral tuberosity, a guide needle is firstly placed for positioning. The main factor of the traditional fixing method for inserting the guide pin is the problem of weak fixation, which is usually performed according to the clinical experience of doctors.

In another aspect, the femoral neck includes an outer hard bone portion and an inner loose bone portion, the loose bone portion filling the entire bone cavity as shown in FIG. 15. The loose bone part of the inner layer has large volume and low density, the intramedullary nail has fixing strength when being fixed on the hard bone part of the outer layer, but the fixing strength when being fixed on the loose bone part of the inner layer is insufficient, and most of the intramedullary nails are actually positioned on the loose bone part of the inner layer. The outer diameters of the root part and the tail end of the femoral neck are larger than that of the neck part, and part of the intramedullary nail is exposed out of the neck part, so that the problem of poor firmness in fixation of the intramedullary nail is caused.

In the prior art, a structure similar to an expansion wire is adopted, the inner wall of a bone cavity is supported in the femoral neck bone cavity through a distraction expansion part, and actually, the inner wall is supported at a loose bone part and compresses the loose bone part to the hard bone inner wall, and the expansion type bone pressing device has the following problems: (1) the expansion surface is a cambered surface, loose bone parts can not be completely stripped and directly contact the inner wall of the hard bone, so that the firmness after compression is insufficient, (2) after expansion and compression, enough constraint force of the femoral neck in the circumferential direction can not be provided, the femoral neck can be dislocated due to rotation, (3) the destructiveness of the loose bone parts is high, when the inner end of the loose bone parts is expanded, all loose bone parts in the bone cavity of the femoral neck are damaged, (4) the expansion part at the inner end of the loose bone parts can not be completely matched with the inner wall of the bone cavity of the femoral neck, and can not provide enough anti-torsion strength, the fracture reduction of a femoral neck fracture patient needs to be maintained at the internal rotation position of the lower limb, the point is embedded by the acetabulum and is not completely spherical, and the body position rotation can bring large torsion to an internal support part, so that the expansion part. For example, the "expansion fixing femoral head inner support body" provided by CN 202146350U includes a support main body and an inner expansion screw, the support main body is sleeved outside the inner expansion screw, the top of the support main body is arc-shaped, the support main body is provided with radial expansion wings, the expansion wings are composed of a plurality of wing panels, an expansion gap is formed between the wing panels, the inner expansion screw is provided with an expansion section, the expansion section can expand the expansion wings after the inner expansion screw is placed in the support main body, and the support main body is in threaded connection with the inner expansion screw. This patent document has the above problems (1) to (4), and "an adjustable compression fixation expansion bolt for femoral neck fracture" disclosed in publication No. CN2299593Y has the above problems (1) to (4). The above problems (2) and (4) are associated with the "femoral neck expansion type locked compression screw" of publication No. CN2487349Y and the "expansion compression bone bolt" of publication No. CN 2209507Y.

Disclosure of Invention

Aiming at the defects and problems of various fixing modes of the prior femur neck, the invention provides a femur neck fracture fixing device which can effectively fix the fracture part of the femur neck from the inside, provide enough torsion-preventing force and prevent secondary damage in a fixing state by sleeving a blade with a matched profile along the radial direction in a femur neck bone cavity, and utilizing a core rod to press the blade and position the blade.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a femoral trochanter region fracture fixing device, includes the intramedullary nail, still includes a plurality of blades and core bar, and the near-end of intramedullary nail sets up the pole perforation, and the pole perforation all edges have the constant head tank, and the blade is including the tool bit convex edge portion that is located outside limit head end, and tool bit convex edge portion matches along radial and clamps in the convex ridge portion inner wall of femoral neck inner chamber, and the sword tail of blade tail end matches and clamps in the peripheral corresponding constant head tank of pole perforation, and the core bar runs through and suit in the pole perforation, and the inner is used for supporting the back of a knife of each blade, and the core bar outer end is. Knife grooves are axially distributed on the outer side of the core rod, and each knife groove is used for matching and sleeving the knife back of the corresponding blade.

The utility model provides a femoral trochanter region fracture fixing device, includes the intramedullary nail, still includes a plurality of blades and core bar, the near-end of intramedullary nail sets up the pole perforation, and the blade is including the tool bit convex edge portion that is located outside limit head end, and tool bit convex edge portion matches along radial and clamps in the protruding ridge portion inner wall of femoral neck inner chamber, and the sword tail of blade tail end matches and clamps in the pole perforation, and the core bar outside has the sword groove along axial distribution, and the core bar runs through and suit in the pole perforation, and inner sword groove is used for matching the back of a knife of the corresponding blade of suit, and the core bar outer end.

The utility model provides a femoral trochanter district fracture fixing device, includes the steel sheet that matches with femoral trochanter district profile, still includes a plurality of blades and core bar, and the steel sheet is including the pole perforation, and there is the constant head tank pole perforation edge all around, and the blade is including the tool bit convex edge portion that is located outside limit head end, and tool bit convex edge portion clamps in the convex ridge portion inner wall of thighbone neck inner chamber along radially matching, and the sword tail of blade tail end matches and clamps in the peripheral corresponding constant head tank of pole perforation, and the core bar runs through and the suit in the pole perforation, and the inner back of a knife blade that is used for supporting each blade, and the core bar outer end is. Knife grooves are axially distributed on the outer side of the core rod, and each knife groove is used for matching and sleeving the knife back of the corresponding blade.

The utility model provides a femoral trochanter district fracture fixing device, includes the steel sheet that matches with femoral trochanter district profile, still includes a plurality of blades and core bar, and the steel sheet is including the pole perforation, and the blade is including the tool bit convex edge portion that is located outside limit head end, and tool bit convex edge portion radially matches and clamps in the protruding ridge portion inner wall of femoral neck inner chamber, and the sword tail matching of blade tail end clamps in the pole perforation, and the core bar outside has the sword groove along axial distribution, and the core bar runs through and suit in the pole perforation, and inner sword groove is used for matching the back of a knife of the corresponding blade of suit, and the core bar outer end is fixed in.

The core rod is a cylindrical core rod, or a plate-type core rod a, or an elliptical core rod b, or a plate-type structure.

The convex edge part of the cutter head of the blade is in a continuous clamping tooth shape.

The outer end of the inner core rod is provided with a separation blade, a fixing through hole is formed in the separation blade, meanwhile, fixing screw holes are formed in the peripheral edge of the rod through hole of the intramedullary nail, and the separation blade is fixed to the outer side of the corresponding rod through hole through screws.

The baffle plate and the core bar are fixed into a whole or assembled and installed into a whole with the core bar.

Has the advantages that: the intramedullary nail is fixed with the tail ends of the blades, and the blades and the mandrel are supported on the inner wall of the convex ridge part of the inner cavity of the femoral neck, so that a firm supporting constraint relation is formed.

The invention uses the blade to be jointed with the inner wall of the femoral neck to enter the bone cavity first, and the destructiveness of loose bone parts in multiple bone cavities is reduced to the minimum. The proper blades can be selected to be completely matched and sleeved on the inner end expansion part of the femoral neck, the edge profile of each blade is completely attached to the inner wall of the bone cavity expansion part, and after the back of each blade is supported by the core rod, each blade is radially supported on the inner wall of the femoral neck bone cavity. This way of supporting and fixing has the following advantages: (1) the blade enters the bone cavity and has small destructiveness to loose bone parts in the femoral neck bone cavity, main loose bone parts (mainly the loose bone parts contacted with the hard bone parts) are reserved, the edge part outline of each blade is completely attached to the inner wall of the expanded part of the bone cavity, the defect of point compression of the existing expansion bolt is overcome, firm compression and uniform stress can be realized, and (3) enough constraint force of the femoral neck in the circumferential direction can be effectively provided, and the femoral neck is prevented from being dislocated due to rotation.

Drawings

Fig. 1 is a schematic diagram of an application state of the present invention.

Fig. 2 is a schematic structural diagram of the appearance of the device in fig. 1.

Fig. 3 is a perspective view of the cylindrical core rod of fig. 2.

Fig. 4 is a perspective view of the blade of fig. 1.

FIG. 5 is a schematic view of the side structures of FIG. 4

Fig. 6 is a schematic view of the cross-sectional structure a-a in fig. 5.

Fig. 7 is a schematic view of a blade structure including a latch.

Fig. 8 is a second schematic diagram of the application state of the present invention.

Fig. 9 is an assembled schematic view of the device of fig. 8.

Fig. 10 is a schematic view of the structure of an intramedullary nail fitted with the device of fig. 8.

Fig. 11 is a schematic view of the structure in the direction B in fig. 10.

Fig. 12 is a schematic view of an oblate (elliptical) core rod configuration.

Fig. 13 is a third schematic diagram of the application state of the present invention.

Fig. 14 is a schematic view of the combination structure of the core bar and the rear baffle in fig. 13.

Fig. 15 is a schematic view of a hole pattern of an intramedullary nail.

Fig. 16 is a schematic view of the structure of the tool tail installed in hole-type matching with fig. 15.

FIG. 17 is a fourth schematic diagram illustrating the application state of the present invention.

FIG. 18 is a fifth schematic diagram illustrating an application state of the present invention.

Fig. 19 is a schematic view of an intramedullary nail installed in cooperation with fig. 18.

Fig. 20 is a schematic view of a plate core pin installed in cooperation with fig. 18.

Reference numbers in the figures: the intramedullary nail comprises anintramedullary nail 1, a rod throughhole 11, apositioning groove 12, afixing screw hole 13, aplane clamping groove 14, aflat hole 15, aninner clamping groove 16, ablocking platform 17, ablade 2, ablade tail 21, a tool bit convexedge part 22, atool back 23, aclamping tooth 24, aclamping platform 25, acylindrical core rod 3, a platetype core rod 3a, anoval core rod 3b, atool groove 31, aplug 32, a radial fixing hole 33, a cambered surfacerear blocking piece 4, a planerear blocking piece 4a, a fixing throughhole 41, aninserting hole 42 and asteel plate 5.

Detailed Description

Example 1: a fixation device as shown in fig. 2, primarily for use in fractures of the trochanteric region of the femoral neck, and in use, see fig. 1. As can be seen in the figures, the device consists essentially of an intramedullary nail, a plurality of blades, and a core rod.

Theintramedullary nail 1 is a specially made intramedullary nail requiring arod bore 11 at its proximal end matching the core rod profile. Further, it is also necessary to have apositioning groove 12 at the peripheral edge of therod penetration hole 11.

As shown in fig. 4 and 5, eachblade 2 includes a blade portion on one side and a blade back on the other side, and a headconvex edge portion 22 protruding outward is provided at the head end of the blade portion side. When the device is used, each blade needs to penetrate through the through holes of the rods one by one and is inserted into the inner cavity of the femoral neck respectively, so that theconvex edge part 22 of the cutter head is radially matched and clamped on the inner wall of the convex ridge part of the inner cavity of the femoral neck.

Theblade tail 21 at the tail end of theblade 2 is matched and clamped in thecorresponding positioning groove 12 at the periphery of the rod throughhole 11, so that theblades 2 can be positioned by utilizing thepositioning grooves 12 respectively, and the conditions of turnover, falling off and the like which possibly occur are prevented.

Then, a core rod is inserted through and sleeved in the rod throughhole 11, and the inner end of the core rod is used for supporting the blade back 23 of eachblade 2, and the outer end of the core rod is fixed on the intramedullary nail or femur.

As can be seen from fig. 3, in the present embodiment, acylindrical core bar 3 is selected, andtool grooves 31 are symmetrically distributed on two sides of thecylindrical core bar 3, and the tool grooves on the two sides are used for matching and sleeving the tool backs 23 of thecorresponding blades 2, and it can also be seen that tool grooves can be respectively arranged on the periphery of the core bar. Thus, each blade is restrained by both thepositioning groove 12 in the rod penetration hole and thecutter groove 31 at the peripheral edge of thecylindrical core rod 3, while being supported radially by the cutter groove of thecylindrical core rod 3. After thecylindrical core rod 3 is installed, eachblade 2 can be fixed in the rod throughhole 11 of theintramedullary nail 1, and the stability of eachblade 2 is ensured.

The fixing mode of the core rod is that an arc-shapedblocking piece 4 is fixed at the outer end of the core rod, and the arc-shapedblocking piece 4 can be sleeved on the outer side surface of the intramedullary nail or in the outer arc-shaped groove in a matching mode. Furthermore, the blocking plate is provided with a fixing throughhole 41, and the periphery of the rod throughhole 11 of the intramedullary nail is provided with a fixingscrew hole 13, so that the blocking plate is fixed on the outer side of the corresponding rod through hole through screws.

The inner ends of the intramedullary nails can also be fixed by corresponding fixing nails to ensure the stabilization of the intramedullary nails.

After fracture of femoral neck trochanter region, because the stress surface of the gudgeon is cracked, lead to nailing insecure problem, so fracture of femoral neck trochanter region is difficult to fix to the mode of femoral neck through-nail through the tradition, and this embodiment is mainly applied to the fixed of fracture of femoral neck trochanter region, and accessible intramedullary nail and blade are firmly connected, make fracture of femoral neck trochanter region position have inward fixed action. The device of this embodiment may also be used in applications to fractures of the femoral shaft and neck.

Example 2: a second femoral trochanter fracture fixation device, in this embodiment, on the basis ofembodiment 1, a rod throughhole 11 is provided at the proximal end of anintramedullary nail 1, andpositioning grooves 12 are provided at the peripheral edge of the rod throughhole 11, ablade 2 includes a blade headconvex edge portion 22 located at the head end of the outer side edge, the blade headconvex edge portion 22 is radially matched and clamped on the inner wall of a convex ridge portion of an inner cavity of a femoral neck, ablade tail 21 at the tail end of theblade 2 is matched and clamped in thecorresponding positioning groove 12 at the periphery of the rod throughhole 11, but a core rod is cylindrical or elliptic cylindrical, a core rod penetrates and is sleeved in the rod throughhole 11, the inner end surface is used for directly supporting a blade back 23 of eachblade 2.

Example 3: in a third femoral trochanter region fracture fixation device, on the basis ofembodiment 1, a rod throughhole 11 is arranged at the proximal end of anintramedullary nail 1, ablade 2 comprises a tool bitconvex edge part 22 positioned at the head end of the outer side edge, the tool bitconvex edge part 22 is matched and clamped on the inner wall of a convex ridge part of an inner cavity of a femoral neck along the radial direction, atool tail 21 at the tail end of theblade 2 is matched and clamped in the rod throughhole 11,tool grooves 31 are axially distributed on the outer side of a core rod, the core rod penetrates through and is sleeved in the rod throughhole 11, the tool grooves at the inner end are used for matching and sleeving a tool back 23.

Example 4: in the fourth femoral trochanteric region fracture fixation device, based on example 3, the core rod is changed into a plate shape, as shown in fig. 20, a plate-type core rod 3a, and the rod through hole provided at the proximal end of the intramedullary nail is changed into aflat hole 15, as shown in fig. 19. In the assembled state of use of the device, as shown in fig. 18, thetool shank 21 can be inserted into theflat hole 15 and supported by theplate core bar 3a on the hole wall. Because the platetype core rod 3a and theside slope 15 are matched for installation, a baffle at the tail part of the core rod is not needed, the outer end of the plate body is directly provided with a through hole, meanwhile, a mounting hole is arranged at the position of the through hole of the intramedullary nail along the direction vertical to the through hole of the rod, and the through hole of the core rod and the mounting hole of the intramedullary nail are fixed together through screws.

Example 5: in a fifth femoral trochanter fracture fixation device, based onembodiment 1, a groove, such as theplanar slot 14 in fig. 9 and 10, is milled at the outer end of the rod through hole of the intramedullary nail, aplanar back stop 4a fixed at the outer end of the core rod can be matched and clamped in theplanar slot 14, and theplanar back stop 4a can support thetool tails 21 of a plurality of blades to prevent the blades from being removed. The planarrear baffle 4a is also fixed with the intramedullary nail to prevent the core rod from being removed. Fig. 10 also shows that astop 17 is provided at the location of the end of thepositioning groove 12 at the periphery of the rod boring 11, by means of which the knife tail can be supported.

Example 6: in a sixth femoral trochanter fracture fixation device, on the basis ofembodiment 1, a stop piece is not arranged at the outer end of a mandrel, a through hole is arranged at the outer end of the mandrel along the radial direction, a mounting hole is arranged at the position of a rod through hole of an intramedullary nail along the direction perpendicular to the rod through hole, and the mandrel through hole and the intramedullary nail mounting hole are fixed together through screws. In order to prevent the blade from sliding along the axial direction, a thinner section of the cutter tail can be arranged as shown in fig. 4, the cutter tail is thinner and has a step with the cutter body, the cutter tail can be clamped in apositioning groove 12 of the through hole of the rod, and the step is supported on the inner side wall of the intramedullary nail.

Example 7: a seventh femoral trochanter fracture fixation device, based onembodiment 1, the rod throughhole 11 at the proximal end of the intramedullary nail is oblate or elliptical and the core rod is matching oblate or elliptical, as shown in fig. 12.

Example 8: the eighth femoral trochanteric region fracture fixation device was constructed in accordance with example 1 by replacing the blade with a continuous serratedcutting head lip 22 as shown in fig. 7.

Example 9: a ninth femoral trochanter fracture fixation device, based onembodiment 1, as shown in fig. 13 and 14, the relationship between thecore rod 3 and the camberedrear baffle 4 or the planarrear baffle 4a is designed to be an insertion relationship of movable connection.

Example 10: in a tenth femoral trochanter fracture fixation device, on the basis ofembodiment 1, an inward concaveinner clamping groove 16 is formed in apositioning groove 12 formed in a rod through hole, as shown in fig. 15, an outward convex clamping table 25 is further arranged on the side surface of acutter tail 21 of ablade 2, and when the cutter tail is mounted in the positioning groove, the clamping table is sleeved with the clamping groove.

Example 11: the eleventh femoral trochanteric region fracture fixation device, based on example 1, comprises asteel plate 5 matched with the contour of the femoral trochanteric region, as shown in fig. 17. Thesteel plate 5 comprises a rod throughhole 11,positioning grooves 12 are formed in the peripheral edge of the rod throughhole 11, theblades 2 comprise tool bitconvex edge portions 22 located at the head ends of the outer sides, the tool bitconvex edge portions 22 are radially matched and clamped on the inner wall of a convex ridge portion of an inner cavity of a femoral neck,tool tails 21 at the tail ends of theblades 2 are matched and clamped in thecorresponding positioning grooves 12 in the periphery of the rod throughhole 11, the core rod penetrates through the rod throughhole 11 and is sleeved in the rod through hole, the inner end of the core rod is used for supporting a tool back 23 of eachblade 2, and the outer end of the core rod is fixed to. In this embodiment, theknife grooves 31 are axially distributed on the outer side of the core bar, and each knife groove is used for matching and sleeving the knife back 23 of thecorresponding blade 2.

Example 12: a twelfth femoral trochanter region fracture fixation device, on the basis ofembodiment 11, includingsteel sheet 5 matching with the profile of the femoral trochanter region, further including a plurality of blades and a core bar,steel sheet 5 includes abar perforation 11,blade 2 includes a headconvex edge portion 22 located at the head end of the outer side, headconvex edge portion 22 matches and clamps in the inner wall of the convex ridge portion of the inner cavity of the femoral neck along the radial direction, ablade tail 21 at the tail end ofblade 2 matches and clamps inbar perforation 11,cutter grooves 31 are distributed along the axial direction outside the core bar, the core bar penetrates and is sleeved in thebar perforation 11, and the cutter groove at the inner end is used for matching and sleeving a blade back 23 of thecorresponding blade 2, and the outer end of the core.

Example 13: a thirteenth femoral trochanter fracture fixation device, based onembodiment 1 or 11, the side of the core rod is provided with a through hole or a screw hole 6 along the radial direction, as shown in fig. 17 and 20, after the core rod is inserted into the femoral neck cavity and the intramedullary nail or the steel plate rod is perforated, the core rod is fixed on the side of the intramedullary nail or the bone part of the femoral neck by a locking wire penetrating into the through hole or the screw hole 6, thereby further constraining and fixing the core rod.

Claims (10)

1. The utility model provides a femoral trochanter region fracture fixing device, including the intramedullary nail, a serial communication port, still include a plurality of blades and core bar, the near-end of intramedullary nail (1) sets up pole perforation (11), and there are constant head tank (12) at pole perforation (11) peripheral edge, blade (2) are including tool bit convex edge portion (22) that are located outside limit head end, tool bit convex edge portion (22) along radially matching clamp in the protruding ridge portion inner wall of femoral neck inner chamber, sword tail (21) matching of blade (2) tail end clamps in the corresponding constant head tank (12) of pole perforation (11) periphery, the core bar runs through and the suit in pole perforation (11), and the inner is used for supporting back of a knife (23) of each blade (2), the core bar outer end is fixed in intramedullary nail or thighbone.

2. The femoral trochanteric region fracture fixation device of claim 1, wherein the core bar has axially distributed flutes (31) on the outside thereof, each for mating with the back (23) of a corresponding blade (2).

3. The utility model provides a femoral trochanter region fracture fixing device, includes the intramedullary nail, a serial communication port, still include a plurality of blades and core bar, the near-end of intramedullary nail (1) sets up pole perforation (11), blade (2) are including tool bit convex edge portion (22) that are located outside limit head end, tool bit convex edge portion (22) radially match to clamp in the protruding ridge portion inner wall of thighbone neck inner chamber, sword tail (21) the matching of blade (2) tail end clamps in pole perforation (11), the core bar outside has sword groove (31) along axial distribution, the core bar runs through and suit in pole perforation (11), and inner sword groove is used for matching back of a knife (23) of suit corresponding blade (2), the core bar outer end is fixed in intramedullary nail or thighbone.

4. The utility model provides a femoral trochanter district fracture fixing device, include steel sheet (5) with the regional profile matching of femoral trochanter, a serial communication port, still include a plurality of blades and core bar, steel sheet (5) are including pole perforation (11), and there are constant head tank (12) pole perforation (11) peripheral edge, blade (2) are including tool bit convex edge portion (22) that are located outside limit head end, tool bit convex edge portion (22) clamp in the protruding ridge portion inner wall of femoral neck inner chamber along radially matching, sword tail (21) matching of blade (2) tail end clamps in pole perforation (11) peripheral corresponding constant head tank (12), the core bar runs through and suit in pole perforation (11), and inner is used for supporting back of a knife (23) of each blade (2), the core bar outer end is fixed in intramedullary nail or thighbone.

5. The femoral trochanteric region fracture fixation device of claim 4, wherein the outside of the core bar is provided with cutter grooves (31) along the axial direction, and each cutter groove is used for matching and sleeving the cutter back (23) of the corresponding cutter blade (2).

6. The utility model provides a femoral trochanter district fracture fixing device, include steel sheet (5) with the regional profile matching of femoral trochanter, a serial communication port, still include a plurality of blades and core bar, steel sheet (5) are including pole perforation (11), blade (2) are including tool bit convex edge portion (22) that are located outside limit head end, tool bit convex edge portion (22) radially match and clamp in the protruding ridge portion inner wall of femoral neck inner chamber, sword tail (21) matching of blade (2) tail end clamps in pole perforation (11), the core bar outside has sword groove (31) along axial distribution, the core bar runs through and suit in pole perforation (11), and sword inslot end is used for matching back of a knife (23) of the corresponding blade (2) of suit, the core bar outer end is fixed in intramedullary nail or thighbone nail.

7. The femoral trochanteric region fracture fixation device of any one of claims 1-6, wherein the core rod is a cylindrical core rod (3), or a plate-type core rod (3) a, or an elliptical core rod (3) b, or a plate-type structure.

8. The femoral trochanteric region fracture fixation device of any one of claims 1-6, wherein the cutting head convex edge portion (22) of the blade (2) is continuous crenellated.

9. The femoral trochanteric region fracture fixation device of any one of claims 1 to 6, wherein there is a baffle plate at the outer end of the inner core rod and a fixation bore (41) is provided on the baffle plate, while there is a fixation screw hole (13) provided at the peripheral edge of the rod bore (11) of the intramedullary nail, the baffle plate being fixed to the outside of the corresponding rod bore by screws.

10. The femoral trochanteric region fracture fixation device of any one of claims 1-6, wherein the baffle is fixed integrally with the core rod or is assembled integrally with the core rod.

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