CN110584761B

CN110584761B - Fracture reduction device

Info

Publication number: CN110584761B
Application number: CN201910930020.1A
Authority: CN
Inventors: 周全
Original assignee: Huai'an Second Peoples Hospital (huai'an Renci Hospital)
Current assignee: Huai'an Second Peoples Hospital (huai'an Renci Hospital)
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-05-26
Anticipated expiration: 2039-09-29
Also published as: CN110584761A

Abstract

The invention provides a fracture restorer, which comprises an inner side fixing part and an outer side fixing part, wherein the inner side fixing part and the outer side fixing part are respectively used for two ends of a fractured bone, and the inner side fixing part and the outer side fixing part can be fixed at a certain angle; the fracture restorer is adjusted, X, Y, Z coordinate origin of virtual coordinates of the restorer is located at the center of a fracture section, the displacement of the fracture section is decomposed into movement of six degrees of freedom through the restorer, then the six degrees of freedom are externalized to the movement and rotation of each joint outside through fixing nails at two ends, and the movement and rotation of each joint outside are used for driving the movement and rotation of the bone inside to restore. According to the fracture restorer, the bone inside is driven to move and rotate to restore through the movement and rotation of each joint outside, and the problem of minimally invasive restoration of fracture sections is solved.

Description

Fracture reduction device

Technical Field

The invention relates to the field of medical instruments, in particular to a fracture restorer.

Background

Current fracture restorer, like patent document 1(CN101278858A) record, including flexible guide arm and semi-annular needle file track, flexible guide arm is formed through the connecting sleeve connection by the sub-guide arm of multistage, annular through groove has been seted up along annular circumference terminal surface axial to semi-annular needle file track, the annular is led to the inslot and is inlayed and is had the arc rack, the annular lead to inslot be equipped with arc rack engaged with's needle file positioning gear, needle file positioning gear with detain and locate arc needle file on the semi-annular needle file track is connected, radial fixedly connected with cylindric shell on the arc needle file, the cylindric shell endotheca is equipped with the lifting rod, the lifting rod upper end is equipped with the lift knob, the lifting rod lower extreme is equipped with needle holder.

Although the fracture repositor realizes the circumferential, axial and radial flexible adjustment of the fixing needle on the fractured limb, the fracture repositor replaces the treatment function of manual reposition, is more accurate in reposition, is easy to master the strength, can conveniently carry out fine adjustment, and avoids the defect of the manual reposition.

However, the fracture reduction device cannot solve the problem of minimally invasive reduction of the fracture section, and as with other reduction devices at present, reduction is not performed with the fracture section as the center, which may cause increase of another degree of freedom during reduction of one degree of freedom, and may cause damage to blood supply of the fracture section.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a fracture restorer, which is used for restoring the fracture by driving the inner bone to move and rotate through the movement and rotation of each joint outside the fracture restorer, so that the problem of minimally invasive restoration of the fracture section is solved.

In order to realize the purpose, the invention provides the following technical scheme:

a fracture repositor comprises an inner fixing part and an outer fixing part, which are respectively used for two ends of a fractured bone, and the inner fixing part and the outer fixing part can be fixed at a certain angle.

Furthermore, the fracture restorer is adjusted to ensure that the X, Y, Z coordinate origin of the virtual coordinate of the restorer is positioned at the center of the fracture section, the displacement of the fracture section is decomposed into the movement of six degrees of freedom through the restorer, then the six degrees of freedom are externalized to the movement and rotation of each joint outside through the fixing nails at the two ends, and the movement and rotation of each joint outside are used for driving the movement and rotation of the bone inside to restore.

Drawings

FIG. 1 is an overall schematic view of the fracture reducer of the present invention;

FIG. 2 is an elevation view of the fracture reducer of the present invention;

FIG. 3 is a top view of the fracture reducer of the present invention;

FIG. 4 is a second top view of the fracture reducer of the present invention;

figure 5 is a side view of the fracture reducer of the present invention.

Reference numerals:

1-inside nail clamping; 2-nailing holes at the inner side; 3-extending the pressurizing slide bar on the inner side; 4-inner side push-pull rod; 5-inner sliding groove block; 6-rotating the clamp; 7-adjusting the bolt; 8-inner ring support; 9-outer ring support; 10-a screw; 11-an outer push-pull rod; 12-outside nail clamp; 13-extending the pressurizing slide bar outside; 14-an annular sliding frame; 15-a universal joint; 16-carriage mount; 17-outer sliding channel block.

(Note: the structures shown in the figures are meant to be illustrative of the nature of the invention and are not intended to be dependent upon the structures shown in the figures.)

Detailed Description

According to the fracture restorer, the problem of minimally invasive restoration of a fracture section is solved, a bone faces to two different directions from a fracture part after fracture under a conventional condition, and restoration and fixation are required to be carried out according to the original direction of the bone. The spatial mutual displacement between two fracture segments can be divided into displacement or rotation in six degrees of freedom, including displacement or rotation in the X-axis, displacement or rotation in the Y-axis, and displacement or rotation in the Z-axis.

As shown in fig. 1-5, it mainly comprises an inner fixing part and an outer fixing part, which are respectively used for two ends of the fractured bone, and the inner fixing part and the outer fixing part can be fixed at a certain angle.

Specifically, the inside fixing portion has an inside nail holder 1, the outside fixing portion has an outside nail holder 12, the inside nail holder 1 has two inside nail holes 2, and the outside nail holder 12 also has two outside nail holes. After the two ends of the bone are fixed by two fixation nails (such as Schanz screws), the fixation nails are fixed by the inner nail hole 2 or the outer nail hole.

The inner side nail clamp 1 is axially arranged at one end of the inner side extension pressurizing slide rod 3 through a universal joint 15, the inner side extension pressurizing slide rod 3 is a push-pull device with a T-shaped groove inside, an inner side push-pull rod 4 is arranged on the side face of the inner side extension pressurizing slide rod 3, the inner side extension pressurizing slide rod 3 is driven to stretch through rotation of the inner side push-pull rod 4, and therefore the inner side sliding groove block 5 arranged at the other end of the inner side extension pressurizing slide rod 3 is driven to move axially.

Preferably, the universal joint 15 can be adjusted to a maximum extent of 30 °.

Similarly, the outer extension pressurizing slide bar 13 has the same structure as the inner extension pressurizing slide bar 3, and is also a push-pull device with a T-shaped groove inside, the outer push-pull rod 4 is arranged on the side surface of the outer extension pressurizing slide bar 13, the outer extension pressurizing slide bar 13 is driven to extend and retract by the rotation of the outer push-pull rod 11, and the outer sliding groove block 17 arranged at the other end of the outer extension pressurizing slide bar 13 is driven to axially move.

The inner sliding groove block 5 and the outer sliding groove block 17 have the same structure and both include a sliding groove, as shown in fig. 4 and 5, but the arrangement directions of the inner sliding groove block 5 and the outer sliding groove block 17 are different by 90 °, that is, the inner sliding groove block 5 and the outer sliding groove block 17 are respectively arranged horizontally and vertically, and accordingly, the sliding grooves in the inner sliding groove block 5 and the outer sliding groove block 17 are also respectively arranged horizontally and vertically, that is, the arrangement directions of the two sliding grooves are different by 90 °.

Further, as shown in fig. 2 and 4, a rotating clamp 6 is disposed in the sliding groove of the inner sliding groove block 5, a part of the rotating clamp 6 is disposed in the inner sliding groove block 5, a screw is disposed in the sliding groove above the inner sliding groove block 5, a nut structure engaged with the screw is disposed on the part of the rotating clamp 6 located in the inner sliding groove block 5, and the part of the rotating clamp 6 located in the inner sliding groove block 5 is driven to move up and down in the sliding groove of the inner sliding groove block 5 by the rotation of the screw.

Likewise, with the same construction, the carriage mount 16 can be moved horizontally within the outer slide channel block 17.

Further, an adjusting bolt 7 is arranged in the rotating clamp 6, and the adjusting bolt 7 is connected to the inner ring support 8. The inner ring support 8, the outer ring support 9 and the annular sliding frame 14 are all circular mechanisms, and the three have the same virtual circle center, that is, the circle centers of the inner ring support 8, the outer ring support 9 and the annular sliding frame 14 need to be located on the central axis of the skeleton.

As shown in fig. 2, the inner ring support 8 is hinged to the outer ring support 9 at both ends, a fixing seat is disposed at the center of the inner ring support 8, the fixing seat can be hinged to one end of a screw 10, and the other end of the screw 10 is movably connected to another fixing seat disposed at the center of the outer ring support 9. The adjusting of the opening of the included angle between the inner ring support 8 and the outer ring support 9 can be realized by adjusting the screw rod 10.

The annular sliding frame 14 penetrates through the sliding frame fixing seat 16, and as shown in fig. 1 and 5, the worm and gear inside the sliding frame fixing seat 16 is meshed with the tooth-shaped structure of the annular sliding frame 14, so that the annular sliding frame 14 can rotate inside the sliding frame fixing seat 16, and the annular sliding frame 14 drives the outer side nail clamp 12 located on the annular sliding frame 14 to move.

When the reduction device is used, 2 fixing nails are respectively driven into two fracture sections before reduction, clamps at two ends are well installed, the reduction device is adjusted, X, Y, Z coordinate origin of virtual coordinates of the reduction device is ensured to be positioned at the center of the fracture end, the displacement of the fracture sections is decomposed into movement with six degrees of freedom through the reduction device, and then the six degrees of freedom are externalized to the movement and rotation of each joint outside through the fixing nails at the two ends. Thus, the bone inside is driven to move and rotate to reset through the movement and rotation of each joint outside.

Compared with the prior fixing nail, the fracture restorer of the invention has the following characteristics:

(1) the minimally invasive reduction is realized, and the wound surface is reduced;

(2) the secondary injury caused by fracture reduction is reduced as much as possible, and the pain of a patient is reduced;

(3) the device is stable and reliable by respectively operating on six degrees of freedom.

The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, which is intended to cover any variations, equivalents, or improvements made within the spirit and scope of the invention.

Claims

1. A fracture restorer is characterized in that:

comprises an inner fixing part and an outer fixing part which are respectively used for two ends of a fractured bone, and the inner fixing part and the outer fixing part can be fixed at a certain angle;

adjusting the fracture restorer to ensure that X, Y, Z coordinate origin of virtual coordinates of the restorer is positioned at the center of the fracture end, decomposing the displacement of the fracture section into movement with six degrees of freedom through the restorer, externalizing the six degrees of freedom to the movement and rotation of each external joint through fixing nails at two ends, and driving the movement and rotation of the fracture end inside to restore through the movement and rotation of each external joint;

the inner fixing part is provided with an inner nail clamp (1), the outer fixing part is provided with an outer nail clamp (12), the inner nail clamp (1) is provided with two inner nail holes (2), the outer nail clamp (12) is also provided with two outer nail holes, and after two ends of a skeleton are fixed by two fixing nails, the fixing nails are fixed by the inner nail holes (2) or the outer nail holes;

the inner side nail clamp (1) is axially arranged at one end of the inner side extension pressurizing slide rod (3) through a universal joint (15), the inner side extension pressurizing slide rod (3) is a push-pull device with a T-shaped groove inside, an inner side push-pull rod (4) is arranged on the side surface of the inner side extension pressurizing slide rod (3), the inner side extension pressurizing slide rod (3) is driven to stretch through the rotation of the inner side push-pull rod (4), and therefore the inner side sliding groove block (5) arranged at the other end of the inner side extension pressurizing slide rod (3) is driven to axially move;

the universal joint (15) can be adjusted within 30 degrees at most;

the outer side extension pressurizing slide rod (13) and the inner side extension pressurizing slide rod (3) have the same structure and are also push-pull devices with T-shaped grooves inside, an outer side push-pull rod (11) is arranged on the side surface of the outer side extension pressurizing slide rod (13), the outer side extension pressurizing slide rod (13) is driven to stretch through the rotation of the outer side push-pull rod (11), and therefore an outer side sliding groove block (17) arranged at the other end of the outer side extension pressurizing slide rod (13) is driven to axially move;

the inner sliding groove block (5) and the outer sliding groove block (17) have the same structure and comprise a sliding groove, but the arrangement directions of the inner sliding groove block (5) and the outer sliding groove block (17) are different by 90 degrees, namely, the inner sliding groove block (5) and the outer sliding groove block (17) are respectively arranged transversely and longitudinally, so that correspondingly, the sliding grooves in the inner sliding groove block (5) and the outer sliding groove block (17) are respectively arranged transversely and longitudinally, namely, the arrangement directions of the two sliding grooves are different by 90 degrees;

a rotating clamp (6) is arranged in a sliding groove of the inner side sliding groove block (5), one part of the rotating clamp (6) is arranged in the inner side sliding groove block (5), a screw is arranged in the sliding groove on the inner side sliding groove block (5), a nut structure meshed with the screw is arranged on the part, located in the inner side sliding groove block (5), of the rotating clamp (6), and the part, located in the inner side sliding groove block (5), of the rotating clamp (6) is driven to move up and down in the sliding groove of the inner side sliding groove block (5) through rotation of the screw;

by the same structure, the sliding frame fixing seat (16) can horizontally move in the outer sliding groove block (17).

2. The fracture repositor of claim 1, wherein:

an adjusting bolt (7) is arranged in the rotary clamp (6), and the adjusting bolt (7) is connected to the inner ring support (8);

the inner ring support (8), the outer ring support (9) and the annular sliding frame (14) are all circular ring mechanisms, and the three mechanisms have the same virtual circle center, namely the circle centers of the inner ring support (8), the outer ring support (9) and the annular sliding frame (14) are required to be located on a central shaft of a skeleton.

3. The fracture repositor of claim 2, wherein:

the end parts of the inner ring support (8) and the outer ring support (9) on two sides are hinged, a fixed seat is arranged at the central position of the inner ring support (8), the fixed seat can be hinged with one end of a connecting screw rod (10), the other end of the screw rod (10) is movably connected with another fixed seat arranged at the central position of the outer ring support (9), and the adjustment of the opening degree of an included angle between the inner ring support (8) and the outer ring support (9) can be realized through the adjusting screw rod (10).

4. A fracture repositor according to claim 3, wherein:

wear to establish annular carriage (14) in carriage fixing base (16), the inside worm gear of carriage fixing base (16) meshes with the profile of tooth structure of annular carriage (14), can realize annular carriage (14) and rotate in carriage fixing base (16) is inside to annular carriage (14) drives outside nail clamp (12) motion that is located it.