CN212490116U - Traction reduction device for femoral fracture coaptation operation - Google Patents

Abstract

The utility model discloses a pull resetting means for femoral fracture coaptation operation, its support frame is the triangle body structure for support patient's low limbs and make its formation and keep the leg bending state, be equipped with the thighbone traction mechanism who is used for the tractive to pass the ke shi needle of patient's thighbone distal end on the thigh bearing surface, thighbone traction mechanism does not receive the restriction that passes two ke shi needle place faces of patient's thighbone distal end, can guarantee to install two ke shi needles on the traction bow.

Description

Traction reduction device for femoral fracture coaptation operation

Technical Field

The utility model relates to the technical field of orthopedic medical equipment, in particular to a traction reduction device for femoral fracture coaptation operation, which is suitable for the coaptation operation of femoral intramedullary nail implantation and percutaneous coaptation plate implantation.

Background

Femur and shin bone fracture are the common fracture in clinic, because leg muscle strength is powerful, often can appear shortening deformity under the traction of muscle after patient's shin bone takes place, and it is comparatively difficult to restore to the throne in the art, resume its length and effectively maintain. If the patient can not be anatomically reduced during the operation, complications such as malformation healing and poor lower limb force line can occur after the operation, thereby causing traumatic arthritis or osteoarthritis and seriously affecting the limb function and the life quality of the patient.

Intramedullary nail fixation or percutaneous minimally invasive implantation of bone fracture plates is a common treatment method for femoral and tibial fractures, and intraoperative traction is an important means for reducing femoral and tibial fractures and recovering the length of lower limbs. At present, two assistants are generally needed to help traction a patient when an intramedullary nail or percutaneous minimally invasive bone plate is implanted for operation, the two assistants respectively hold the near end and the far end of a broken bone to reposition the femur or tibia, however, the method cannot stably maintain fracture repositioning and lower limb length, and the repositioning effect is not ideal, so that the treatment effect is influenced; moreover, the two assistants can crowd the space of the operator and influence the operation of the operator.

The defects can be overcome by adopting the traction device to reposition the fractured femur or tibia, but the existing traction devices straighten the lower limb, and the intramedullary nail is implanted from the distal end of the femur or the proximal end of the tibia, so that the patient can only perform the operation by keeping the leg-bending posture.

The Chinese patent application CN201911423627.7 discloses an automatic traction device for lower limb fracture setting operation, which enables a patient to keep leg bending posture for operation by arranging a triangular support frame, completes the traction of the broken bone by the functions of hinging among all surfaces and adjusting the length, is also provided with an adjusting mechanism with each angle on the support frame, is convenient for resetting the broken bone, meets various requirements of operation in the operation, is suitable for different situations of different patients, and has higher popularization. However, the device has at least the following disadvantages:

1. the plane where the mounting positions of the two Kirschner wires on the traction bow at the femur are positioned cannot be adjusted, the mounting positions of the two Kirschner wires are always positioned in the same plane with the traction bow, the swing amplitude of the traction bow is limited, and when the plane where the two Kirschner wires passing through the distal end of the femur of a patient are positioned is not in the same plane with the traction bow main body, the Kirschner wires cannot be mounted on the traction bow;

2. the whole drive of the device mostly adopts an electric motor, particularly the distal part of the femur, and the arrangement of the electric motor can shield the lateral fluoroscopy, thereby influencing the fluoroscopy effect.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a traction reduction device for femoral fracture coaptation operation, which is not limited by the surface of two kirschner wires passing through the distal end of the femur of a patient, and can ensure that the traction reduction device is installed on a traction bow by the two kirschner wires.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is:

a traction reduction device for femoral fracture coaptation operation, its characterized in that includes:

the supporting frame is in a triangular structure formed by three surfaces, and is provided with a lower leg bearing surface for bearing the lower leg of the patient, a thigh bearing surface for bearing the thigh of the patient and a supporting part for supporting the knee joint of the patient, which is formed at the top of the supporting frame; and

the femur traction mechanism is arranged on the thigh bearing surface and used for pulling the Kirschner wire passing through the distal end of the femur of the patient; wherein

The femoral distraction mechanism includes:

the traction bow stretches across the thigh bearing surface and is detachably fixed with the thigh bearing surface;

the two connecting sleeves are respectively fixed at two ends of the opening of the traction bow, the axes of the two connecting sleeves are arranged along the width direction of the thigh bearing surface, the connecting sleeves are provided with circular through holes, and the end surfaces of the outer ends of the connecting sleeves are provided with first teeth;

the two traction rods II are respectively and movably arranged in the two connecting sleeves in the axial direction and are limited in rotation, external threads are arranged on the outer walls of the two traction rods II, the cross sections of the external threads are non-circular, and the opposite ends of the two traction rods II are detachably fixed with the two ends of the Kirschner wire by virtue of the first connecting assembly;

the two clamping rings are provided with holes matched with the sections of the second traction rods, the two clamping rings are respectively sleeved at the outer ends of the second traction rods, and the inner end surfaces of the clamping rings are provided with second teeth capable of being meshed with the first teeth; and

and the two adjusting nuts IV are respectively screwed on the two traction rods II outside the clamping ring.

The further technical scheme is that a section of annular space is further arranged between the inner wall of the outer end of the connecting sleeve and the second traction rod, a fifth spring is arranged in the annular space, and when the clamping ring is meshed with the connecting sleeve, the fifth spring is in a compressed state.

A further technical solution is that the first connecting component comprises:

the middle part of the adjusting plate is hinged with the second traction rod, and an adjusting long hole is formed in the adjusting plate; and

two latch fittings, can slide locate adjust the downthehole and lock of elongated, the latch fitting can be dismantled fixedly with the tip of a ke shi needle that corresponds.

A further aspect is that the lock comprises:

the second bolt penetrates through the adjusting long hole and is limited in rotation;

the pressing ring is sleeved on the second bolt, and a second pressing groove for accommodating the Kirschner wire is formed in the end face, facing the adjusting plate, of the pressing ring;

and the locking nut is in threaded connection with the second bolt and is used for pressing the Kirschner wire between the pressing ring and the adjusting plate.

The further technical scheme is that the surface of the second pressure groove and/or the end face, facing the pressure ring, of the adjusting plate are/is provided with grains for increasing friction force.

The further technical scheme is that the method further comprises the following steps:

the adjusting frame is used for fixing the traction bow and the thigh bearing surface, the adjusting frame can drive the traction bow to move and lock along the length direction of the thigh bearing surface, and the traction bow can also be driven to swing to adjust the included angle formed between the traction bow and the thigh bearing surface.

A further technical solution is that the adjusting bracket comprises:

the two triangular supports are respectively arranged on two sides of the thigh bearing surface, and each triangular support is formed by sequentially hinging a rod I, a rod II and a rod III; wherein

The first rod is arranged along the length direction of the thigh bearing surface and can move and be locked along the thigh bearing surface by virtue of a lifting assembly on the thigh bearing surface;

the second rod is arranged on the back of the traction bow and is fixed with the traction bow;

and the third rod is of a telescopic rod structure.

The further technical scheme is that the traction bow can slide along the second rod and be locked.

A further technical solution is that the lifting assembly comprises:

the third screw is arranged on the side edge of the upper part of the thigh bearing surface;

the jacking block is connected to the third screw rod in a sliding mode, and a fifth adjusting nut is screwed on the third screw rod below the jacking block;

the guide block is fixed at the upper end of the third screw rod;

the axial of the first rod is provided with a guide groove, the top of the guide groove is communicated with a circumferential arc-shaped groove, the bottom of the first rod is inserted into the ejector block, the upper end of the first rod movably penetrates through the guide block, and the guide block is provided with a slide rod capable of sliding along the guide groove and the arc-shaped groove.

A further technical solution consists in that the traction bow comprises:

two traction arms; and

the connecting arm is made of carbon fiber perspective materials, and two ends of the connecting arm are fixed with the end parts of the two traction arms to form an arch structure.

The technical scheme is that a connecting end of the traction arm and the connecting arm is provided with a clamping groove, a transverse bulge is arranged on the inner wall of the clamping groove, two ends of the connecting arm are inserted into the corresponding clamping grooves and are in concave-convex fit with the clamping grooves, and the traction arm and the connecting arm are fixed through screws.

A further technical solution consists in that,

the thigh bearing surface is enclosed by two support rods which are respectively arranged at two sides of the width of the thigh bearing surface to form a rectangular frame structure.

The technical scheme is that the fracture reduction mechanism further comprises a first fracture reduction mechanism for the femur, and the first fracture reduction mechanism for the femur comprises:

the thighbone near-end supporting piece stretches across the thigh bearing surface, two ends of the thighbone near-end supporting piece can slide and be locked along the axial direction of the supporting rod through the fixing piece, and the thighbone near-end supporting piece can also be located on the front side and the back side of the thigh bearing surface and close to the thigh bearing surface to move and be locked through the fixing piece.

The further technical scheme is that the fixing piece can also rotate and be locked along the supporting rod.

A further technical solution is that the fixing member includes:

fixing the pressing plate;

the movable pressing plate is arranged in parallel with the fixed pressing plate, and the opposite surfaces of the fixed pressing plate and the movable pressing plate are correspondingly provided with arc-shaped pressing grooves for accommodating the supporting rods;

the bolt I is used for connecting the fixed pressing plate and the movable pressing plate and locking and fixing the fixed pressing plate and the movable pressing plate through a locking nut; and

and the second screw rod is perpendicular to the thigh bearing surface and is rotatably fixed on the fixed pressing plate, two ends of the second screw rod extend out of the thigh bearing surface, and two ends of the thighbone near-end supporting piece are provided with threaded holes and are in threaded connection with the second screw rod.

A further technical scheme lies in, still include thighbone fracture canceling release mechanical system two, thighbone fracture canceling release mechanical system two includes:

the at least two lateral jacking wires are respectively arranged at two sides of the thigh bearing surface, are arranged in parallel with the thigh bearing surface and are used for laterally jacking the proximal end or the distal end of the femur;

each side jackscrew can move close to or far away from the thigh bearing surface and be locked, move along the length direction of the thigh bearing surface and be locked, and move axially and be locked through a side jackdrive assembly.

The further technical scheme is that the side top driving component comprises:

the second sliding block is connected to the supporting rod in a sliding mode, and a through hole perpendicular to the thigh bearing surface and a sliding groove penetrating through the through hole are formed in the second sliding block;

the second quick adjusting block is slidably arranged in the sliding groove, an inserting hole which can be coaxial with the through hole and has a diameter larger than that of the through hole is formed in the second quick adjusting block, a protruding second clamping block is arranged on the inner wall of the inserting hole, a locking hole for the supporting rod to movably penetrate is further formed in the second quick adjusting block, and the second quick adjusting block extends out of the sliding groove;

the spring IV is pressed between the bottom of the sliding groove and the quick adjusting block II and applies outward thrust to the quick adjusting block II; and

the outer diameter of the inserted rod is matched with the through hole and is inserted into the through hole and the jack, a plurality of circles of concave clamping grooves II are formed in the outer wall of the inserted rod at intervals in the axial direction, and the upper end of the inserted rod is connected with the side jackscrew;

under the effect of spring four, inserted bar and jack eccentric settings for in the second card of fixture block goes into draw-in groove two, realize the axial locking of inserted bar, and locking hole and bracing piece eccentric settings, make second of fast adjusting block support the bracing piece, realize the position locking of slider two.

The further technical scheme is that the side top driving component further comprises:

the second fixing block is fixed at the top of the inserting rod and is provided with a through hole;

adjusting a third nut;

the lateral jackscrew is provided with an external thread, the axial movement of the lateral jackscrew penetrates through the second fixed block and is limited by rotation, and the three adjusting nuts are connected to the lateral jackscrew through threads and are positioned on the inner side of the second fixed block and can be abutted against the inner side of the second fixed block.

The technical scheme is that the through hole in the sliding block II is provided with a plurality of radial clamping grooves III, the side wall of the inserted bar is provided with a radial protruding positioning fin, and the positioning fin can be clamped into any clamping groove III.

The further technical scheme is that the end parts of two adjacent surfaces in the supporting frame are hinged, and the length of each surface is adjustable and can be locked.

A further technical scheme lies in, the length of bracing piece is adjustable, includes:

a sleeve member;

the rod piece is sleeved with the sleeve piece in a sliding mode; and

and the annular lock can lock the sleeve piece and the rod piece.

A further technical solution consists in that the annular lock comprises:

the tooth grooves are formed in the rod piece at equal intervals in the axial direction and are triangular;

one end of the rotating handle is rotatably fixed at the end part of the sleeve piece, the other end of the rotating handle is sleeved outside the rod piece, and a notch is formed in the side wall of the rotating handle;

the locking block is inserted into the notch, can move radially in the notch and can be limited axially and annularly, the locking block can move radially inwards and can be clamped with the tooth socket, and a chamfer is arranged on one side, close to the casing piece, of the radial outer end of the locking block to form a wedge-shaped surface;

the lock sleeve is sleeved outside the sleeve piece in a sliding mode, an axial annular space is formed between the inner wall of the lock sleeve and the outer wall of the rotary handle, a circle of lock groove is formed in the position, corresponding to the lock block, of the inner wall of the lock sleeve, and the side wall, corresponding to the wedge-shaped surface of the lock block, of the lock groove is a wedge-shaped pushing surface; and

the second spring is arranged in the annular space;

when the locking block moves towards the locking groove, the locking sleeve can be driven to extrude the second spring and is separated from the tooth groove on the rod piece.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:

when the plane where the two Kirschner wires driven into the distal end of the femur are not in the same plane with the traction bow, the adjusting nut IV is loosened, and the traction rod II can rotate in the connecting sleeve, so that the mounting positions of the two Kirschner wires can be adjusted at any angle, and the two Kirschner wires are fixed with the traction bow.

After the adjusting nut IV is screwed, the retainer ring is meshed with the end face teeth of the connecting sleeve, so that the rotation of the retainer ring and the traction rod II is limited, the traction rod II can move outwards by continuously rotating the adjusting nut IV, a transverse traction force is applied to the Kirschner wire, and the lateral angulation deformity of the fractured femur can be corrected by adjusting the traction force on one side.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of the construction of the apparatus;

FIG. 2 is a schematic view of the tibial distraction mechanism of the device;

FIG. 3 is a cross-sectional view of the support rod of the present device;

FIG. 4 is another cross-sectional view of the support rod of the present device;

FIG. 5 is a schematic end view of the connection end of the cannula member to the rotatable handle of the present device;

FIG. 6 is a schematic view of the construction of the annular lock in the present device;

FIG. 7 is a schematic structural view of a proximal femoral support of the present device;

FIG. 8 is a schematic structural view of a second slide block in the device;

FIG. 9 is a schematic view of the side top drive assembly of the present apparatus;

FIG. 10 is a schematic view of the femoral distraction mechanism of the device;

FIG. 11 is a schematic view of the structure of the adjusting frame of the present device;

FIG. 12 is a side view of the pulling arm and connecting arm of the present device;

FIG. 13 is a schematic structural view showing a storage state of the apparatus;

FIG. 14 is another schematic view of the storage state of the device;

FIG. 15 is another schematic view of the present apparatus;

fig. 16 is a side view of the device.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Example one

As shown in fig. 1 to 16, one embodiment of the distraction reduction device for femoral fracture osteosynthesis of the present disclosure includes a support frame and a femoral distraction mechanism 210.

The support frame is placed on an operating table, is surrounded by three surfaces to form a triangular structure, and is provided with a lower leg bearing surface 1 for bearing the lower leg of a patient, a thigh bearing surface 2 for bearing the thigh of the patient, a horizontal support bottom surface 3 and a support part 4 which is formed at the top of the support frame and is used for supporting the knee joint of the patient and supporting the lower limb of the patient to form and keep the leg bending state.

The femur traction mechanism 210 is disposed on the thigh bearing surface 2 and is used for pulling the kirschner wire passing through the distal end of the femur of the patient to promote effective reduction of the fractured femur.

As shown in fig. 10, the femoral distraction mechanism 210 includes a distraction bow 211, two connection sleeves 212, two distraction rods two 213, two collars 214, and two adjustment nuts four 215.

The traction bow 211 spans the thigh support surface 2 and is detachably fastened to the thigh support surface 2.

The two connecting sleeves 212 are respectively fixed at two ends of the opening of the traction bow 211, are provided with round holes, the axes of the round holes are arranged along the width direction of the thigh bearing surface 2, the connecting sleeves are provided with round through holes, and the end surfaces of the outer ends of the connecting sleeves are provided with a first tooth 2121.

The two second traction rods 213 are respectively and movably arranged in the two connecting sleeves 212 in the axial direction and can move and rotate in the connecting sleeves 212 in the axial direction, external threads are arranged on the outer walls of the second traction rods 213, the cross sections of the external threads are non-circular, and the opposite ends of the two second traction rods 213 are detachably fixed with the two ends of the Kirschner wire by virtue of the first connecting assembly.

The two collars 214 are provided with holes matched with the cross sections of the second pulling rods 213, the collars 214 and the second pulling rods 213 cannot rotate relatively, the two collars 214 are respectively sleeved at the outer ends of the second pulling rods 213, and the inner end surfaces of the collars 214 are provided with second teeth 2141 capable of being meshed with the first teeth 2121.

The two adjusting nuts four 215 are respectively screwed on the two pulling rods two 213 outside the collar 214.

When the plane of two Kirschner wires driven at the far end of the femur is not in the same plane with the traction bow 211, the adjusting nut IV 215 is loosened, no meshing force exists between the clamping ring 214 and the connecting sleeve 212, and the traction rod II 213 can rotate in the connecting sleeve 212 to adjust the plane of the connecting assembly I, so that the connecting assembly I can be fixed with the two Kirschner wires.

After the adjusting nut IV 215 is screwed, the clamping ring 214 is meshed with the end face teeth of the connecting sleeve, so that the rotation of the clamping ring 214 and the traction rod II 213 is limited, the traction rod II 213 can be moved outwards by continuously rotating the adjusting nut IV 215, the transverse traction force is applied to the Kirschner wire, and the lateral angulation deformity of the fractured femur can be corrected.

When the device is used for carrying out a distal femur broken bone fracture setting operation, taking an implanted intramedullary nail as an example, the traction method comprises the following steps:

1. under the perspective environment, a Kirschner wire is respectively driven into the front side and the rear side of the distal end of the femur;

2. adjusting the position of the first connecting component on the traction bow and locking, and fixing the two ends of the Kirschner wire on the femur traction mechanism 210;

3. applying appropriate transverse traction force to the two ends of the Kirschner wire by using the femur traction mechanism 210 so as to keep the Kirschner wire in a linear stretching state, and adjusting each angle of the Kirschner wire to promote fracture reduction;

4. performing intramedullary nail implantation operation.

Example two

According to an embodiment of the present disclosure, an annular space is further provided between the inner wall of the outer end of the connecting sleeve 212 and the pulling rod two 213, a spring five 216 is disposed in the annular space, and when the collar 214 is engaged with the connecting sleeve 212, the spring five 216 is in a compressed state.

After the fourth adjusting nut 215 is loosened, the collar 214 can be quickly separated from the connecting sleeve under the action of the fifth spring 216, so that the second pulling rod 213 can be rotated.

EXAMPLE III

In accordance with an embodiment of the present disclosure, as shown in fig. 10, the first connecting assembly includes an adjusting plate 217 and two locking members.

The middle part of the adjusting plate 217 is hinged with the second pulling rod 213, the included angle formed by the adjusting plate 217 and the second pulling rod 213 is adjustable, and an adjusting long hole 2171 is formed in the adjusting plate 217. Two locking members are slidably disposed in the adjustment long hole 2171 and locked, and the locking members are detachably fixed to the end of a corresponding kirschner wire.

The elongated adjustment holes 2171 are adapted to the condition that the two k-wires are not parallel, and the two k-wires are fixed to the adjustment plate 217 by adjusting the positions of the two locking members at each end to adapt to different end distances between the two k-wires.

Example four

According to an embodiment of the present disclosure, the locking member includes a second bolt, a pressing ring 218, and a locking nut. The second bolt is inserted into the long adjustment hole 2171 and is limited in rotation, and the specific form of the limitation in rotation can set the cross section of the second bolt to be non-circular. The pressing ring 218 is sleeved on the second bolt, a second pressing groove 2181 for accommodating the kirschner wire is formed in the end face, facing the adjusting plate 217, of the pressing ring, and the section of the second pressing groove 2181 is arc-shaped or triangular, so that the pressing ring is suitable for extruding and fixing kirschner wires with different diameters. The lock nut is screwed on the second bolt and used for pressing the Kirschner wire between the pressing ring 218 and the adjusting plate 217. The clamping nut is screwed to press the pressing ring 218, so that the end part of the Kirschner wire is pressed in the second pressing groove 2181 between the pressing ring 218 and the adjusting plate 217, and the Kirschner wire is fixed.

Furthermore, the surface of the second pressing groove 2181 and/or the end face of the adjusting plate 217 facing the pressing ring 218 are/is provided with grains for increasing friction force so as to increase the stability of the mounting of the kirschner wire.

EXAMPLE five

According to an embodiment of the present disclosure, the traction reduction device further includes an adjustment bracket 220. The adjusting frame 220 is used for fixing the traction bow 211 with the thigh bearing surface 2, and the adjusting frame 220 can drive the traction bow 211 to move and lock along the length direction of the thigh bearing surface 2 so as to be fixed with the Kirschner wire at a proper position and pull the Kirschner wire to reduce the fracture; the traction bow 211 can also be driven to swing to adjust the included angle between the traction bow and the thigh bearing surface 2 so as to correct the angulation deformity before and after the fracture of the femur.

EXAMPLE six

According to an embodiment of the present disclosure, as shown in fig. 11, the adjusting frame 220 comprises two triangular brackets respectively disposed at both sides of the thigh supporting surface 2, each of which is formed by a first rod 221, a second rod 222 and a third rod 223 hinged in sequence.

Wherein the first rod 221 is arranged along the length direction of the thigh support surface 2 and can be moved and locked along the thigh support surface 2 by means of a lifting assembly on the thigh support surface 2. The second rod 222 is arranged on the back of the traction bow 211 and is fixed with the traction bow 211. The third rod 223 is a telescopic rod structure.

The third rod can be specifically sleeved and stretched by adopting a threaded rod of a threaded connection and a screwed pipe with an internal thread, a nut is screwed on the threaded rod and abuts against the end part of the screwed pipe, and the threaded rod can stretch into or stretch out of the screwed pipe by rotating the nut, so that the third rod can stretch out and stretch out.

Through the extension and contraction of the third rod, the second rod can drive the traction bow 211 to swing along the hinged part so as to correct the anterior-posterior angulation deformity of the fractured femur.

Through the lifting of the first rod, the traction bow 211 can be moved to a proper position of a thigh to be fixed with the Kirschner wire, and the Kirschner wire can be pulled to reduce the fracture and recover the length of the femur.

EXAMPLE seven

According to one embodiment of the present disclosure, the traction bow 211 can slide and lock along the second rod.

Specifically, the second connecting component can comprise a screw rod with a bottom support and a nut, so that the second rod is clamped between the bottom support and the nut, and the traction bow 211 and the second rod can be fixed or can slide by screwing or loosening the nut. Wherein, the bottom support is provided with a groove matched with the second rod, so that the fixation is more stable.

The two ends of the traction bow 211 synchronously move close to or far away from the thigh bearing surface 2, so that the front and back angulation deformity of the broken femur can be corrected. One end of the traction bow 211 moves independently, and the adjustment of the internal rotation and external rotation angles of the fractured femur can be realized.

Example eight

According to an embodiment of the present disclosure, as shown in fig. 11, the lifting assembly includes a third screw 224, a top block 225, and a guide block 226.

The third screw 224 is arranged on the side edge of the upper part of the thigh bearing surface 2; the top block 225 is connected to the third screw rod 224 in a sliding mode, and the third screw rod 224 below the top block 225 is connected with a fifth adjusting nut in a threaded mode; the guide block 226 is fixed to the upper end of the third screw 224.

The axial direction of the first rod 221 is provided with a guide groove, the top of the guide groove is communicated with an annular arc-shaped groove 2211, the bottom of the first rod 221 is inserted into the top block 225, the upper end of the first rod 221 movably penetrates through the guide block 226, and the guide block 226 is provided with a slide rod 2261 capable of sliding along the guide groove and the arc-shaped groove 2211.

When the slide bar 2261 on the guide block 226 is positioned in the guide groove, the first bar can only move up and down, and the position of the top block 225 can be adjusted and limited downwards by changing the position of the adjusting nut five on the screw rod three 224. When the first rod is lowered to the lowest position, the sliding rod 2261 on the guide block 226 is located in the arc-shaped groove 2211, and the first rod at this time can rotate inwards, and the adjusting nut is further screwed downwards to separate the top block 225 from the rod, so that the adjusting frame 220 can be accommodated, as shown in fig. 13 and 14. The space occupied by storage is saved, and the storage and the disinfection treatment are convenient.

Because the width of each side receives the restriction of operation table size in the support frame, for making the device can adapt to the obese patient of posture, can arrange the outside of bracing piece 10 in parallel with three 224 screws, fixed through the connecting rod between the both ends of three 224 screws and bracing piece 10, can increase the length of traction bow 211 like this, can be applicable to the patient of different postures, the adaptability is high, and spreading value is big.

Example nine

According to an embodiment of the present disclosure, the traction bow 211 is a split structure, as shown in fig. 12, and includes two traction arms 2111 and a connecting arm 2112, the connecting arm 2112 is made of carbon fiber transparent material for easy perspective, and both ends of the connecting arm 2112 are fixed to the ends of the two traction arms 2111 to form an arch structure.

Example ten

According to an embodiment of the present disclosure, a connecting end of the drawing arm 2111 and the connecting arm 2112 has a clamping groove, a transverse protrusion is provided on an inner wall of the clamping groove, both ends of the connecting arm 2112 are inserted into the corresponding clamping grooves and are in concave-convex fit with the clamping grooves, and the drawing arm 2111 and the connecting arm 2112 are further fixed by screws.

After the fourth adjusting nut 215 is screwed, the fourth adjusting nut 215 extrudes the traction arm 2111 inwards, so that the connection between the traction arm 2111 and the connecting arm 2112 is firmer, and the structure matched with the concave-convex structure is arranged, so that the stress of the connection between the traction arm 2111 and the connecting arm 2112 is concentrated on the concave-convex part, the stress of the wall of the hole of the screw is reduced, the cracking of the connecting arm 2112 is avoided, and the connection is more stable.

EXAMPLE eleven

According to one embodiment of the present disclosure, the thigh support surface 2 is enclosed by two support bars 10 disposed on either side of its width to form a rectangular frame structure.

Example twelve

According to an embodiment of the present disclosure, the distraction reduction device further comprises a first femur fracture reduction mechanism 230, which can be used for supporting the proximal femur and correcting the anterior-posterior angulation deformity of the distal femur.

The first femoral fracture reduction mechanism 230 is shown in FIG. 7 and includes a proximal femoral support 123. the proximal femoral support 123 is made of carbon fiber that is transparent. The proximal femur supporting member 123 spans the thigh bearing surface 2, and both ends of the proximal femur supporting member 123 can slide and lock along the axial direction of the supporting rod 10 through the fixing member 121, and the proximal femur supporting member 123 can also be located on both the front and back sides of the thigh bearing surface 2 and move and lock close to the thigh bearing surface 2 through the fixing member 121.

The middle part of the proximal femur support 123 is a concave arc, which can better support the limb and avoid pressing the limb during supporting.

EXAMPLE thirteen

According to an embodiment of the present disclosure, the fixing member 121 can also be rotated and locked along the support bar 10. Can be used for correcting the internal rotation and external rotation angles of fractured femur.

Example fourteen

According to an embodiment of the present disclosure, as shown in fig. 7, the fixing member 121 includes a fixed pressure plate 1211, a movable pressure plate 1212, a first bolt 1213, and a second screw 122.

The movable pressing plate 1212 is arranged in parallel with the fixed pressing plate 1211, the opposite surfaces of the fixed pressing plate 1211 and the movable pressing plate 1212 are correspondingly provided with arc-shaped pressing grooves for accommodating the supporting rod 10, and the fixed pressing plate 1211 and the movable pressing plate 1212 are connected by a first bolt 1213 and are locked and fixed by a nut.

The second screw 122 is perpendicular to the thigh bearing surface 2 and is rotatably fixed on the fixed pressing plate 1211, two ends of the second screw 122 extend out of the thigh bearing surface 2, and two ends of the proximal femur supporting member 123 are provided with threaded holes and are screwed on the second screw 122.

In addition, when the proximal femoral support 123 is used only for supporting the patient, the second screw 122 is disposed on the outer side of the support rod 10 for the convenience of operation and for the obese.

And meanwhile, the second screw rods 122 on the two sides are rotated to drive the two ends of the proximal femur supporting piece 123 to synchronously move in the same direction, so that the movement close to or far from the thigh bearing surface 2 is adjusted. By adjusting the distance between the thigh bearing surface 2 and the thigh proximal end supporting part 120, the thigh proximal end supporting part 123 also has the functions of jacking and pressing the proximal end of the thigh, so that the front and back angulation deformity of the broken femur can be corrected.

When the femur has the forward angulation deformity, the femur proximal end support 123 is adjusted to be positioned in front of the thigh, then the femur proximal end support 123 is driven to move backwards to be close to the thigh bearing surface, the femur proximal end is pressed down, and the correction of the forward angulation deformity of the fractured femur is realized.

When the femur has the backward angulation deformity, the femur proximal end support 123 is adjusted to be positioned below the thigh, and then the femur proximal end support 123 is driven to move forwards to be close to the thigh bearing surface to push the proximal end of the femur forwards, so that the correction of the backward angulation deformity of the fractured femur is realized.

After the fixing pieces 121 on the two sides are loosened, the two ends of the proximal femur supporting piece 123 can rotate, so that the two adjusting screws 122 can independently rotate to adjust the height of one end of the proximal femur supporting piece 123, the distance between one end of the proximal femur supporting piece 123 and the thigh bearing surface 2 is adjusted, the adjustment of the internal rotation and eversion angles of fractured femur is realized, the fixing pieces 121 on the two sides are fixed after the adjustment is finished, and the stability of the state is ensured.

Further, a third spring 1214 can be arranged on the first bolt 1213, and the third spring 1214 is positioned between the lock nut and the pressure plate on the same side. The third spring 1214 is arranged to rapidly spring the movable pressing plate 1212, so as to achieve the rotation between the fixing member 121 and the supporting rod 10.

Example fifteen

According to an embodiment of the present disclosure, the distraction reduction device further comprises a second femoral fracture reduction mechanism 240 for correcting the lateral angulation deformity of the femoral fracture.

The second femur fracture reduction mechanism 240 includes at least two lateral top threads 131 respectively disposed on two sides of the thigh support surface 2, and arranged parallel to the thigh support surface 2 for laterally pressing the proximal end or the distal end of the femur. A set of lateral jackscrews 131 may be provided at both the proximal and distal ends of the femur.

A side pressing plate is detachably fixed at the front end of the side jackscrew 131 to ensure a pressing area and not damage skin tissues, the side pressing plate is preferably an arc-shaped plate, and the side pressing plate can be detached to expose the sharp end of the side jackscrew 131 according to the operation condition.

Each of the side jacks 131 can be moved and locked close to or away from the thigh support surface 2, moved and locked along the length of the thigh support surface 2, and moved and locked axially by a side jack drive assembly.

Example sixteen

According to an embodiment of the present disclosure, as shown in fig. 9, the side top driving assembly includes a second sliding block 132, a second quick adjustment block 133, a fourth spring 134 and an insertion rod 135.

The second sliding block 132 is slidably connected to the support rod 10, and an axially slidably connected concave-convex matching structure is provided between the second sliding block 132 and the support rod 10, so that the second sliding block 132 can only move axially along the support rod 10 and cannot rotate. A through hole vertical to the thigh bearing surface 2 and a sliding groove communicated with the through hole are arranged on the second sliding block 132.

The second quick adjusting block 133 is arranged in the sliding groove in a sliding mode, a jack which can be coaxial with the through hole and is larger than the through hole in diameter is formed in the second quick adjusting block 133, a convex clamping block 1332 is arranged on the inner wall of the jack, a locking hole 1331 for enabling the supporting rod 10 to movably penetrate is further formed in the second quick adjusting block 133, and the second quick adjusting block 133 extends out of the sliding groove.

The spring IV 134 is pressed between the bottom of the sliding chute and the quick adjusting block II 133 and is in a compressed state, and outward thrust is applied to the quick adjusting block II 133.

The outer diameter of the inserted link 135 is matched with the through hole and inserted into the through hole and the insertion hole, and the through hole can radially limit the inserted link 135. A plurality of circles of concave clamping grooves II are axially arranged on the outer wall of the inserted rod 135 at intervals, and the upper end of the inserted rod 135 is connected with the side jackscrew 131;

under the action of the fourth spring 134, the inserted link 135 and the jack are eccentrically arranged, so that the second clamping block is clamped into the second clamping groove, the axial locking of the inserted link 135 is realized, the locking hole 1331 and the support rod 10 are eccentrically arranged, the second quick adjusting block 133 abuts against the support rod 10, and the position locking of the second sliding block 132 is realized.

And the outer end of the second quick adjusting block 133 is also in threaded connection with a second adjusting nut 136.

When the distance between the side jackscrew 131 and the thigh bearing surface 1 needs to be adjusted, the second adjusting nut 136 is loosened, medical staff press the second quick adjusting block 133 to further extrude the fourth spring 134 to overcome the acting force of the fourth spring 134 on the second quick adjusting block 133, so that the jack and the insert rod 135 are concentrically arranged, the second clamping block exits from the second clamping groove, so that the medical staff can hold the insert rod 135 to perform height adjustment, after the height of the insert rod 135 is adjusted, the second quick adjusting block 133 is loosened, the insert rod 135 and the jack are eccentrically arranged under the action of the fourth spring 134, the second clamping block is clamped into the second clamping groove to realize axial locking of the insert rod 135, the second adjusting nut 136 is screwed again, so that the second adjusting nut 136 draws the second quick adjusting block 133 outwards, a pre-tightening force is formed between the locking hole 1 of the second quick adjusting block 133 and the supporting rod 10, and the position stability of the second sliding block 132 is ensured. Thereby achieving the movement and locking of the drive side jack 131 closer to or farther from the thigh support surface 2.

When the position of the second sliding block 132 on the supporting rod 10 needs to be adjusted, the second adjusting nut 136 is loosened, and the medical staff pushes the second sliding block 132 to overcome the friction force between the locking hole 1331 and the supporting rod 10. Thereby realizing the movement and locking of the driving side jack 131 along the length direction of the thigh supporting surface 2.

Example seventeen

According to an embodiment of the present disclosure, the side top driving assembly further includes a second fixing block 137 and a third adjusting nut 138 to realize axial movement and locking of the driving side top thread 131.

The second fixing block 137 is fixed to the top of the inserting rod 135 and is provided with a through hole, the side jackscrew 131 is provided with an external thread, the axial movement of the second fixing block 137 is limited by rotation, the third adjusting nut 138 is in threaded connection with the side jackscrew 131 and is located on the inner side of the second fixing block 137 and can be abutted against the inner side of the second fixing block 137, the third adjusting nut 138 is axially positioned, and the side jackscrew 131 cannot be separated from the inner side of the second fixing block 137.

By rotating the third adjustment nut 138, axial movement of the lateral jackscrew 131 is driven to adjust the lateral jacking force to correct the lateral angulation deformity of the femoral fracture.

EXAMPLE eighteen

According to an embodiment of the present disclosure, as shown in fig. 8, the through hole of the second sliding block 132 has a plurality of radial slots three 1321, and the side wall of the insert rod 135 has a radially protruding positioning fin, and the positioning fin can be inserted into any slot three 1321.

The three clamping grooves 1321 are preferably arranged in three, so that the side jackscrews 131 can be perpendicular to the support rod 10 and form an included angle of 60 degrees and-60 degrees, and the operation is convenient.

Example nineteen

According to an embodiment of the disclosure, the two adjacent end parts of the support frame are hinged, and the length of each surface is adjustable and can be locked.

For the different patients ' of adaptation posture difference, set up the length of each face of support frame, and the contained angle that becomes into adjustable form, can change the height of support frame and thigh bearing surface 2's length to make the form of support frame adjust according to patient's bodily form, make patient's shank can carry on shank bearing surface 1, the thigh is taken on thigh bearing surface 2, can satisfy different patients ' user demand.

In addition, the supporting frame is adjusted to shorten the thigh bearing surface 2, the upper part of the thigh bearing surface 2 moves downwards, and then the Kirschner wire is driven to move downwards, so that downward traction force is applied to the Kirschner wire, the fracture of the fractured bone is reduced, and the length of the lower limb is recovered. The traction can be realized by adjusting the length of the corresponding surface on the support frame, thereby being beneficial to improving the operation quality and the operation efficiency and being suitable for popularization and application in various medical institutions.

Example twenty

According to an embodiment of the present disclosure, as shown in fig. 3 and 4, the length of the supporting bar 10 is adjustable to satisfy the adjustable length of the thigh supporting surface 2.

The telescopic structure of the support rod 10 comprises a sleeve member 101 and a rod member 102 which are slidably sleeved, and the combined length of the sleeve member 101 and the rod member 102 is locked by an annular lock to keep the length of the support rod 10 stable.

Example twenty one

According to an embodiment of the present disclosure, the ring lock includes a rotating handle 103, a lock block 104, a lock sleeve 105, and a second spring 106.

A plurality of tooth sockets 1021 are axially and equidistantly arranged on the rod piece 102, the tooth sockets 1021 are triangular, and the triangular tooth sockets 1021 can form wedge-shaped surfaces in the axial direction and the annular direction, so that the lock block 104 can slide in and out conveniently.

One end of the rotating handle 103 is rotatably fixed at the end of the sleeve member 101 through a spring collar or a bearing, and the other end is sleeved outside the rod member 102, and a notch is formed in the side wall of the rotating handle 103.

The locking piece 104 is inserted into the notch, can radially move in the notch, and is axially and annularly limited, the locking piece 104 radially moves inwards and can be connected with the tooth socket 1021 in a clamping manner, and one side of the radial outer end of the locking piece 104, which is close to the casing part 101, is provided with a chamfer to form a wedge-shaped surface.

The lock sleeve 105 is slidably sleeved outside the sleeve member 101, an axial annular space is formed between the inner wall of the lock sleeve 105 and the outer wall of the rotating handle 103, a circle of lock groove is formed in the inner wall of the lock sleeve 105 corresponding to the lock block 104, and the side wall of the lock groove corresponding to the wedge-shaped surface of the lock block 104 is a wedge-shaped pushing surface.

The second spring 106 is arranged in the annular space.

When the lock block 104 moves towards the lock groove, the lock sleeve 105 can be driven to press the second spring 106 and disengage from the toothed groove 1021 on the rod 102.

When the length of the support rod 10 needs to be adjusted, the medical staff rotates the rotating handle 103, the rotating handle 103 simultaneously drives the locking block 104 to rotate, the locking block 104 can be separated from the tooth space 1021, and the rod member 102 and the cannula member 101 can be adjusted in length without axial limiting of the locking block 104. When the lock block 104 can be disengaged from the tooth socket 1021, the lock block 104 moves outward in the radial direction, and the wedge surface on the lock block 104 presses the pushing surface on the lock sleeve 105, so that the lock sleeve 105 moves axially towards one end of the sleeve member 101 and presses the second spring 106. After the length of the supporting rod 10 is adjusted, the rotating handle 103 is rotated reversely, when the rotating handle 103 drives the locking block 104 to move to the clamping groove position, the locking sleeve 105 is reset axially under the action of the second spring 106, and the locking block 104 can be pressed into the locking groove radially under the action of the pushing surface, so that the locking block 104 is effectively clamped in the tooth groove 1021, and the reliability of the length of the supporting rod 10 is ensured.

The telescopic link of this structure is manual regulation mode, and it is convenient to adjust, when the annular lock is in the open mode, can carry out the large-size quick adjustment to the length of bracing piece 10, can practice thrift operation time.

Example twenty two

According to an embodiment of the present disclosure, as shown in fig. 4, a length marking 1022 is disposed on a side of the rod 102 opposite to the tooth socket 1021, for displaying the length of the telescopic rear supporting rod 10, so as to facilitate control of the size of the telescopic rod, and the operation is more convenient.

Example twenty three

According to one disclosed embodiment, a guiding and limiting groove 1023 is axially formed in the rod 102, a block 1011 capable of sliding in the guiding and limiting groove 1023 is fixed on the sleeve 101, and one end of the guiding and limiting groove 1023 in the sleeve 101 is closed.

The cooperation of direction spacing groove 1023 and guide block 226 for member 102 and casing 101 can only carry out the axial telescopic adjustment, can not take place to rotate, has avoided member 102 and casing 101 card to die. And the end of the guide limiting groove 1023 in the sleeve 101 is closed, so that the separation of the rod piece 102 and the sleeve 101 is avoided, the problem that the support frame scatters and loses the supporting force due to misoperation in the operation is avoided, and the reassembling of the support frame is avoided.

Example twenty-four

According to the disclosed embodiment, as shown in fig. 5 and 6, a primary-secondary engagement structure is provided between the end surface of the sleeve member 101 and the rotating handle 103, and the rotating handle 103 is rotated by 90 ° on the sleeve member 101 from the tooth socket 1021 to the smooth surface side of the rod member 102 and then is limited, and is also rotated by 90 ° in the opposite direction and then is limited. Moreover, icons for displaying the opening or closing state of the annular lock are arranged on the support rod 10, so that the operation of medical staff is facilitated, and the operation correctness is ensured.

Example twenty-five

According to one disclosed embodiment, the distraction device further comprises a tibial distraction mechanism 110, which is disposed on the calf support surface 1 and is used for distracting a K-wire passing through the ankle bone or the distal end of the tibia of the patient to promote effective reduction of the broken tibia.

As shown in fig. 2, the tibial distraction mechanism 110 includes two sliders one 111, two quick adjustment blocks one 112, two springs one 113, a positioning structure, a threaded sleeve 114, a screw one 115, a driving portion, and a distraction assembly.

The two first sliding blocks 111 are respectively arranged on two sides of the lower leg bearing surface 1, and the first sliding blocks 111 are connected to the lower leg bearing surface 1 in a sliding mode along the length direction and can be locked with the supporting frame through the first locking structures. A through hole vertical to the lower leg bearing surface 1 and a sliding groove communicated with the through hole are arranged on the first sliding block 111.

The two first quick adjusting blocks 112 are respectively arranged in the two sliding grooves in a sliding mode, the first quick adjusting blocks 112 are provided with inserting holes which can be coaxial with the through holes and are larger than the through holes in diameter, and the inner walls of the inserting holes are provided with first protruding clamping blocks.

The two springs (113) are respectively pressed between the bottom of the sliding chute and the first quick adjusting block (112) and are in a compressed state, and outward thrust is applied to the first quick adjusting block (112).

And a positioning structure is arranged between the first quick adjusting block 112 and the first sliding block 111 and is used for preventing the first quick adjusting block 112 from being separated from the first sliding block 111, and a movement amount for enabling the first quick adjusting block 112 to move inwards to further compress the first spring 113 is reserved.

The diameter of the threaded sleeve 114 is matched with the through hole and is inserted into the through hole and the insertion hole, so that the threaded sleeve 114 is limited by the through hole in the radial direction. A plurality of circles of concave clamping grooves I are axially arranged on the outer wall of the threaded sleeve 114 at intervals, and under the action of a spring I113, the threaded sleeve 114 and the jack are eccentrically arranged, so that the clamping blocks I are clamped into the clamping grooves I and can slide along the clamping grooves I, and the axial locking of the threaded sleeve 114 is realized.

The first screw 115 is in threaded connection with the threaded sleeve 114, and the upper end of the first screw protrudes out of the threaded sleeve 114.

The driving portion is fixed to a lower end of the screw nut 114 and drives the screw nut 114 to rotate.

And two ends of the traction assembly are respectively fixed with the upper ends of the two first screw rods 115 and are used for detachably connecting two ends of the Kirschner wire and transversely drawing the Kirschner wire.

The implementation form of the positioning structure can set a long hole in the outer wall of the first quick adjusting block 112 along the direction of the sliding groove, a round hole is correspondingly arranged on the first sliding block 111, and then the positioning pin is penetrated through the long hole and the round hole, so that the first quick adjusting block 112 can be pressed inwards, and the first sliding block 111 cannot be separated from the positioning structure.

The first sliding blocks 111 are slidably connected to the support rod 10, a tibia far-end support member 120 is further disposed between the first sliding blocks 111, and both ends of the tibia far-end support member 120 are pivotally connected to the back surfaces of the corresponding first sliding blocks 111.

The material of the tibia far-end support piece 120 is a carbon fiber perspective material, two ends of the tibia far-end support piece 120 are pivoted to the back surfaces of the corresponding first sliding blocks 111, so that the position of the tibia far-end support piece 120 follows the position of the first sliding blocks 111, and the tibia far-end support piece 120 can support the tibia far end of the patient and is not limited by the height of the patient.

The shin bone traction mechanism 110 in the device has the multi-angle adjusting function:

1. the first sliding blocks 111 are synchronously adjusted to slide along the length direction of the lower leg bearing surface 1, so that the position of a connecting line (namely a kirschner wire) at the two ends of the traction assembly in the length direction of the lower leg bearing surface can be adjusted;

2. any one of the first sliding blocks 111 slides along the length direction of the lower leg bearing surface 1, so that the inclination angle of a connecting line of the two ends of the traction assembly in the lower leg bearing surface can be adjusted, namely the lateral angulation of the Kirschner wire;

3. the height of the first screw rods 115 is synchronously adjusted, namely the distance between a connecting line at the two ends of the traction assembly and the lower leg bearing surface can be adjusted;

4. the included angle formed by the connecting line of the two ends of the traction component and the lower leg bearing surface, namely the inward rotation and outward rotation angles of the kirschner wire, can be adjusted by adjusting the height of any screw rod I115.

Therefore, the tibia traction mechanism can be fixed with the Kirschner wire driven at any angle, and then the lateral angulation deformity, the anteroposterior angulation deformity and the internal rotation and eversion angles of the fractured tibia can be corrected by traction of the Kirschner wire at different angles so as to reduce the fracture.

In addition, the traction assembly not only maintains tension on the k-wire, but also adjusts the amount of lateral traction at either end of the traction assembly, as well as correcting lateral angulation deformities of the fractured bone.

Moreover, the height adjustment of the first screw 115 (i.e., the height adjustment of the distraction assembly) by the tibial distraction mechanism 110 has two modes, namely, a quick adjustment mode and a precise adjustment mode:

when the height difference of the first screw rod 115 needing to be adjusted is large, the first spring 113 is inwards extruded by pressing the first quick adjusting block 112, the acting force of the first spring 113 on the first quick adjusting block 112 is overcome, so that the jack on the first quick adjusting block 112 and the threaded sleeve 114 are concentrically arranged, the first clamping block is withdrawn from the first clamping groove on the threaded sleeve 114, at the moment, medical personnel can hold the threaded sleeve 114 by hand to adjust the large-size height, and the threaded sleeve 114 is in threaded connection with the first screw rod 115, so that the quick adjustment of the height of the first screw rod 115 can be realized; after coarse adjustment is carried out in place, the first quick adjusting block 112 is released, the first spring 113 releases energy, the jack on the first quick adjusting block 112 and the threaded sleeve 114 are arranged eccentrically, and the first clamping block is clamped into the first clamping groove to realize axial fixation of the threaded sleeve 114;

when the height of the first screw rod 115 needs to be accurately adjusted, the motor drives the threaded sleeve 114 to rotate, and the first clamping block is clamped into the first clamping groove to limit the axial direction of the threaded sleeve 114, so that the first screw rod 115 is driven to axially move, and the accurate adjustment of the height of the first traction rod 117 is realized.

Through the quick adjustment of the height of the screw rod I115, the operation time can be saved, and the operation adjusting device is particularly suitable for operation adjustment when the Kirschner wire is installed on the pulling assembly, but is not limited to the operation; the precision adjustment of the height of the first screw rod 115 is particularly suitable for operation adjustment (but not limited to the operation) during traction reduction of a broken bone, good reduction of the broken bone is guaranteed, resistance during traction can be effectively overcome through the driving form of the driving part, and compared with a manual quick adjustment mode, the manual quick adjustment device can also save physical strength of medical staff.

During operation, the support frame is placed on the operating table and below the lower limbs of a patient, the upper body of the patient lies flat, the affected limb is bent, and the lower leg is lapped on the lower leg bearing surface 1, so that the purposes of supporting the lower limbs of the patient to form and keeping the leg bending state are achieved, and operation of a doctor is facilitated.

When the device is used for calcaneus or tibia far-end broken bone fracture surgery, taking an intramedullary nail implantation operation as an example, the traction method comprises the following steps:

1. under the perspective environment, a Kirschner wire is driven into a proper position at the far end of the tibia;

2. adjusting the position, angle and height of the pulling group price, and then fixing two ends of the Kirschner wire on the pulling assembly;

3. applying appropriate transverse traction force to the two ends of the Kirschner wire by using the tibia traction mechanism 110 so as to keep the Kirschner wire in a linear stretching state, adjusting the lateral, front-back and internal-external rotation angles of the Kirschner wire, adjusting the first sliding block 111 to move upwards, and reducing the fracture to promote the reduction of the fractured bone;

4. performing intramedullary nail implantation operation.

Example twenty-six

According to one disclosed embodiment, as shown in FIG. 2, the pulling assembly includes two securing blocks one 118, two pulling rods one 117, and two pulling nuts 119.

The two first fixing blocks 118 are respectively fixed at the upper ends of the two first screws 115, and are provided with through holes along the width direction of the lower leg bearing surface 1. The two first traction rods 117 are respectively and movably arranged in the through holes of the two first fixed blocks 118 in the axial direction and limited in rotation, external threads are arranged on the first traction rods 117, and the opposite ends of the two first traction rods 117 are detachably fixed with the two ends of the Kirschner wire. The two drawing nuts 119 are respectively in threaded connection with the two drawing rods one 117 and are positioned on the outer side of the fixing block one 118.

The specific form that the first traction rod 117 is limited by rotation can set the first traction rod 117 and the through hole on the first fixing block 118 to be matched polygons.

The detachable fixing form of the Kirschner wire and the traction rod I117 can adopt the mode that a fixed pressing plate is fixed on the two traction rod I117, the fixed pressing plate is connected with a movable pressing plate through a bolt and nut assembly to form an adjustable pressing groove, and the Kirschner wire is placed in the pressing groove and is screwed by a nut to realize the fixation.

After the two ends of the Kirschner wire are mounted on the first traction rod 117, the traction nut 119 is rotated to enable the first traction rod 117 to move outwards along the through hole on the first fixing block 118 so as to apply transverse traction force to the Kirschner wire, the Kirschner wire has tension in the length direction, and the lateral angulation deformity of the fractured tibia can be corrected by adjusting the screwing force of the traction nut 119 on one side.

The above is only the preferred embodiment of the present invention, and any person can make some simple modifications, deformations and equivalent replacements according to the present invention, all fall into the protection scope of the present invention.

Claims (22)

1. A traction reduction device for femoral fracture coaptation operation, its characterized in that includes:

the supporting frame is of a triangular structure formed by three surfaces, and is provided with a lower leg bearing surface (1) for bearing the lower leg of a patient, a thigh bearing surface (2) for bearing the thigh of the patient and a supporting part (4) for supporting the knee joint of the patient, wherein the supporting part is formed at the top of the supporting frame; and

the femur traction mechanism (210) is arranged on the thigh bearing surface (2) and is used for pulling the kirschner wire passing through the distal end of the femur of the patient; wherein

The femoral distraction mechanism (210) comprises:

the traction bow (211) spans the thigh bearing surface (2) and is detachably fixed with the thigh bearing surface (2);

the two connecting sleeves (212) are respectively fixed at two ends of an opening of the traction bow (211), the axes of the two connecting sleeves are arranged along the width direction of the thigh bearing surface (2), the connecting sleeves are provided with circular through holes, and the end surfaces of the outer ends of the connecting sleeves are provided with first teeth (2121);

the two second traction rods (213) are respectively and movably arranged in the two connecting sleeves (212) in the axial direction, external threads are arranged on the outer walls of the second traction rods (213), the cross sections of the external threads are non-circular, and the opposite ends of the second traction rods (213) are detachably fixed with the two ends of the Kirschner wire by virtue of the first connecting assemblies;

the two clamping rings (214) are provided with holes matched with the cross sections of the second traction rods (213), the two clamping rings (214) are respectively sleeved at the outer ends of the second traction rods (213), and the inner end surfaces of the clamping rings (214) are provided with second teeth (2141) capable of being meshed with the first teeth (2121); and

and the two adjusting nuts IV (215) are respectively screwed on the two pulling rods II (213) outside the clamping ring (214).

2. The traction-return apparatus as claimed in claim 1, wherein an annular space is provided between the inner wall of the outer end of the connecting sleeve (212) and the traction rod two (213), and a spring five (216) is provided in the annular space, and when the collar (214) is engaged with the connecting sleeve, the spring five (216) is in a compressed state.

3. The distraction restoration device of claim 1, wherein the first coupling assembly comprises:

the middle part of the adjusting plate (217) is hinged with the second traction rod (213), and an adjusting long hole (2171) is formed in the adjusting plate (217); and

and two locking pieces which can be slidably arranged in the adjusting long hole (2171) and locked, wherein the locking pieces are detachably fixed with the end part of a corresponding kirschner wire.

4. The distraction restoration device of claim 3, wherein the lock comprises:

the second bolt penetrates through the adjusting long hole (2171) and is limited by rotation;

the pressing ring (218) is sleeved on the second bolt, and a second pressing groove (2181) for accommodating the Kirschner wire is formed in the end face, facing the adjusting plate (217), of the pressing ring;

and the lock nut is screwed on the second bolt and is used for pressing the Kirschner wire between the pressing ring (218) and the adjusting plate (217).

5. The traction reduction device according to claim 4, wherein the surface of the second pressing groove (2181) and/or the end face of the adjusting plate (217) facing the pressing ring (218) are provided with textures for increasing friction force.

6. The distraction restoration device of claim 1, further comprising:

the adjusting frame (220) is used for fixing the traction bow (211) with the thigh bearing surface (2), the adjusting frame (220) can drive the traction bow (211) to move and lock along the length direction of the thigh bearing surface (2), and can also drive the traction bow (211) to swing to adjust an included angle formed between the traction bow and the thigh bearing surface (2).

7. Traction-reduction device according to claim 6, characterized in that said adjustment bracket (220) comprises:

the two triangular supports are respectively arranged at two sides of the thigh bearing surface (2), and each triangular support is formed by sequentially hinging a rod I (221), a rod II (222) and a rod III (223) in a surrounding way; wherein

The first rod (221) is arranged along the length direction of the thigh bearing surface (2) and can move and be locked along the thigh bearing surface (2) by virtue of a lifting assembly on the thigh bearing surface (2);

the second rod (222) is arranged on the back surface of the traction bow (211) and is fixed with the traction bow (211);

and the third rod (223) is of a telescopic rod structure.

8. Traction reduction device according to claim 6, characterized in that said traction bow (211) can slide and lock along the second rod.

9. The traction-return apparatus of claim 7, wherein said lifting assembly comprises:

a third screw (224) which is arranged on the side edge of the upper part of the thigh bearing surface (2);

the jacking block (225) is connected onto the screw rod III (224) in a sliding mode, and the screw rod III (224) below the jacking block (225) is connected with the adjusting nut V in a threaded mode;

a guide block (226) fixed to the upper end of the third screw (224);

the axial of pole one (221) is seted up the guide way on, has annular arc wall (2211) in the top intercommunication of guide way, peg graft on kicking block (225) the bottom of pole one (221), the guide block (226) is passed in the upper end activity of pole one (221), have on the guide block (226) and can follow gliding slide bar (2261) in guide way and arc wall (2211).

10. Traction reduction device according to claim 1, characterized in that said traction bow (211) comprises:

two traction arms (2111); and

the connecting arms (2112) are made of carbon fiber perspective materials, and two ends of each connecting arm (2112) are fixed with the end parts of the two traction arms (2111) to form an arch structure.

11. The traction reduction device according to claim 10, wherein the connection end of the traction arm (2111) and the connection arm (2112) is provided with a clamp slot, the inner wall of the clamp slot is provided with a transverse protrusion, the two ends of the connection arm (2112) are inserted into the corresponding clamp slot and are in concave-convex fit with the clamp slot, and the traction arm (2111) and the connection arm (2112) are further fixed through screws.

12. The distraction restoration device of claim 1,

the thigh bearing surface (2) is surrounded by two support rods (10) which are respectively arranged at two sides of the width of the thigh bearing surface to form a rectangular frame structure.

13. The distraction reduction device of claim 12, further comprising a first femoral fracture reduction mechanism (230), the first femoral fracture reduction mechanism (230) comprising:

the thighbone near-end supporting piece (123) stretches across the thigh bearing surface (2), two ends of the thighbone near-end supporting piece can slide and be locked along the axial direction of the supporting rod (10) through the fixing piece (121), and the thighbone near-end supporting piece (123) can also be located on the front side and the back side of the thigh bearing surface (2) through the fixing piece (121) and moves and is locked close to the thigh bearing surface (2).

14. Traction-reduction device according to claim 13, characterized in that said fixing element (121) is also able to rotate and lock along the support bar (10).

15. The distraction reduction device of claim 14, wherein the fixation member (121) comprises:

a fixed platen (1211);

the movable pressing plate (1212) is arranged in parallel with the fixed pressing plate (1211), and an arc-shaped pressing groove for accommodating the supporting rod (10) is correspondingly arranged on the surface of the fixed pressing plate (1211) opposite to the movable pressing plate (1212);

the first bolt (1213) connects the fixed pressure plate (1211) and the movable pressure plate (1212) and is locked and fixed through a locking nut; and

and the second screw rod (122) is perpendicular to the thigh bearing surface (2) and is rotatably fixed on the fixed pressing plate (1211), two ends of the second screw rod (122) extend out of the thigh bearing surface (2), and two ends of the thighbone near-end supporting piece (123) are provided with threaded holes and are in threaded connection with the second screw rod (122).

16. The distraction reduction device of claim 12, further comprising a second femoral fracture reduction mechanism (240), the second femoral fracture reduction mechanism (240) comprising:

the at least two lateral jackscrews (131) are respectively arranged at two sides of the thigh bearing surface (2), are arranged in parallel with the thigh bearing surface (2) and are used for laterally jacking the proximal end or the distal end of the femur;

each side jackscrew (131) can move close to or far away from the thigh bearing surface (2) through a side jacking driving component and is locked, moves along the length direction of the thigh bearing surface (2) and is locked, and moves axially and is locked.

17. The distraction restoration device of claim 16, wherein the side top drive assembly comprises:

the second sliding block (132) is connected to the supporting rod (10) in a sliding mode, and a through hole perpendicular to the thigh bearing surface (2) and a sliding groove penetrating through the through hole are formed in the second sliding block (132);

the second quick adjusting block (133) is slidably arranged in the sliding groove, a jack which can be coaxial with the through hole and has a diameter larger than that of the through hole is formed in the second quick adjusting block (133), a protruding second clamping block (1332) is arranged on the inner wall of the jack, a locking hole (1331) for enabling the supporting rod (10) to movably penetrate through is further formed in the second quick adjusting block (133), and the second quick adjusting block (133) extends out of the sliding groove;

the spring IV (134) is pressed between the bottom of the sliding groove and the quick adjusting block II (133) and applies outward thrust to the quick adjusting block II (133); and

the outer diameter of the inserted rod (135) is matched with that of the through hole, the inserted rod is inserted into the through hole and the through hole, a plurality of rings of concave clamping grooves II are axially arranged on the outer wall of the inserted rod (135) at intervals, and the upper end of the inserted rod (135) is connected with the side jackscrew (131);

under the effect of spring four (134), inserted bar (135) and jack eccentric settings for in the draw-in groove two is blocked to fixture block two, realize the axial locking of inserted bar (135), and locking hole (1331) and bracing piece (10) eccentric settings, make fast adjusting block two (133) support bracing piece (10), realize the position locking of slider two (132).

18. The distraction restoration device of claim 17, wherein the side top drive assembly further comprises:

the second fixing block (137) is fixed at the top of the inserted link (135) and is provided with a through hole;

a third adjusting nut (138);

and the side jackscrew (131) is provided with an external thread, the axial direction of the side jackscrew is movably penetrated and arranged on the second fixing block (137) and is limited by rotation, and the third adjusting nut (138) is in threaded connection with the side jackscrew (131) and is positioned on the inner side of the second fixing block (137) and can be abutted against the inner side of the second fixing block (137).

19. The traction-reduction apparatus as claimed in claim 17, wherein the through-hole of the second slider (132) has a plurality of radial slots three (1321), and the side wall of the insert rod (135) has a radially protruding positioning fin which can be inserted into any slot three (1321).

20. The traction-reduction apparatus as claimed in claim 12, wherein the support frame is hinged at both ends, and each face is adjustable in length and lockable.

21. Traction-reduction device according to claim 20, characterized in that said support bar (10) is adjustable in length, comprising:

a sleeve member (101);

the rod piece (102) is sleeved with the sleeve piece (101) in a sliding mode; and

an annular lock capable of locking the sleeve member (101) and the rod member (102).

22. The distraction restoration device of claim 21, wherein the annular lock comprises:

the tooth sockets (1021) are arranged on the rod piece (102) at equal intervals in the axial direction, and the tooth sockets (1021) are triangular;

the rotating handle (103) is rotatably fixed at one end of the sleeve piece (101) at one end, the rod piece (102) is sleeved at the other end of the rotating handle, and a notch is formed in the side wall of the rotating handle (103);

the locking block (104) is inserted into the notch, can move radially in the notch and is limited axially and annularly, the locking block (104) can move radially inwards and can be clamped with the tooth groove (1021), and a chamfer is arranged on one side, close to the sleeve piece (101), of the radial outer end of the locking block (104) to form a wedge-shaped surface;

the lock sleeve (105) is sleeved outside the sleeve piece (101) in a sliding mode, an axial annular space is formed between the inner wall of the lock sleeve (105) and the outer wall of the rotating handle (103), a circle of lock groove is formed in the position, corresponding to the lock block (104), on the inner wall of the lock sleeve (105), and the side wall, corresponding to the wedge-shaped face of the lock block (104), of the lock groove is a wedge-shaped pushing face; and

the second spring (106) is arranged in the annular space;

when the lock block (104) moves towards the lock groove, the lock sleeve (105) can be driven to extrude the second spring (106) and is separated from the toothed groove (1021) on the rod piece (102).

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