CN116264981A

CN116264981A - Angle-adjustable orthopedic external fixing device

Info

Publication number: CN116264981A
Application number: CN202111549951.0A
Authority: CN
Inventors: 田洪涛; 张英泽; 陈伟; 童伟; 彭毅
Original assignee: Wuhan Tuosirui Medical Technology Co ltd
Current assignee: Wuhan Tuosirui Medical Technology Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2023-06-20

Abstract

Disclosed is an angle-adjustable orthopedic external fixation device, comprising: a first clamping assembly (10) adapted to grip a first element of an external fixation system; a second clamping assembly (20) adapted to grip a second element of the external fixation system; and a rotation assembly (30) coupled to the first clamping assembly (10) and the second clamping assembly (20) such that the coupling allows rotation of the first clamping assembly (10) about its own axis (107) and the axis of rotation (301) of the rotation assembly (30), and rotation of the second clamping assembly (20) about its own axis (207). The invention solves the problem that the angle adjustment of the external fixing device in the prior art is inconvenient.

Description

Angle-adjustable orthopedic external fixing device

Technical Field

The invention relates to an angle-adjustable orthopedic external fixation device.

Background

Reduction, fixation and healing are three important processes of fracture treatment, and fixation is an important link in fracture treatment. Good fixation not only can consolidate the resetting effect, but also can promote the healing speed and quality. At present, three modes are fixed on the affected part of the fracture, namely, the first mode is traditional splint fixation, the second mode is internal fixation, and the third mode is external fixation.

The splint fixation is to manually reset the fracture, and then to bind and fix the fracture by using a plaster splint or other hard splints. The fixing mode is more traditional, the fixing is extremely unstable, the fracture is easy to loosen and shift, and the healing effect is poor.

Internal fixation is performed by cutting open soft tissues of a fracture part to expose a fracture section, and after the fracture is reduced under direct vision, fixing the fracture part by using metal fixtures such as a bone fracture plate, a set screw, an intramedullary nail, a pressurized steel plate and the like. Although the fixing mode has better resetting and fixing effects, the operation wound is larger, the operation time is longer, and serious iatrogenic injury can be caused to patients. In addition, in many cases, after fracture healing, a secondary operation is required to be performed on the patient, and the internal fixation object is taken out, so that secondary injury is caused to the patient.

External fixation is performed by performing surgery to reduce the fracture and installing an external bone fixator outside the fractured limb for fixation. The external bone fixator is an external steel frame assembled by clamping devices, rods, pins and the like, and can support bones and correct various displacements of the bones in the healing process. The external fixation operation has small wound, no secondary operation is needed, and the application is the most extensive. However, the clamping angle of the clamping device of the existing external fixing device is generally not adjustable, or the adjusting range is limited. The doctor is inconvenient to operate when performing the operation, the operation time is prolonged, steel nails are sometimes required to be punched on bones of the patient to fix the patient, iatrogenic injury of the patient is increased, and the infection probability is increased.

Disclosure of Invention

The angle-adjustable orthopedic external fixing device provided by the invention solves the problem that the angle adjustment of the external fixing device in the prior art is inconvenient.

According to a first aspect of an embodiment of the present invention, there is provided an angle-adjustable orthopedic external fixation device, comprising:

a first clamping assembly adapted to capture a first element of an external fixation system;

a second clamping assembly adapted to capture a second element of the external fixation system; and

a rotation assembly coupled to the first clamping assembly and the second clamping assembly such that the coupling permits rotation of the first clamping assembly about its longitudinal axis and the axis of rotation of the rotation assembly shaft, and rotation of the second clamping assembly about its longitudinal axis.

In the first aspect, the first clamping assembly includes: a first jaw; a second clamping jaw arranged opposite to the first clamping jaw to form a containing part for clamping the first element therebetween, wherein the bottom of the second clamping jaw is provided with an anti-rotation surface; and a first screw extending through the first jaw, the second jaw and defining the first clamping assembly longitudinal axis;

the second clamping assembly includes: a third jaw; a fourth clamping jaw arranged opposite to the third clamping jaw to form a containing part for clamping the second element therebetween, wherein the bottom of the fourth clamping jaw is provided with an anti-rotation surface; and a second screw extending through the third jaw, the fourth jaw and defining the second clamp assembly longitudinal axis.

In the first aspect described above, the rotation assembly is connected to the first clamping assembly via a rotation inhibitor, the rotation inhibitor upper surface being a surface adapted to complement an anti-rotation surface of the first clamping assembly.

In the first aspect, the rotating assembly includes:

a base having a hole therein for receiving the threaded portion of the second screw, the lower surface of the base being a surface adapted to be in contact with a complementary anti-rotation surface of the second clamping assembly; and

and the two discs are arranged on the upper surface of the base, the circumferential surfaces of the two discs are anti-rotation surfaces which are suitable for being complementary with the lower surface of the rotation preventing piece, two ends of the rotating shaft are arranged on the two discs, and the part of the rotating shaft between the two discs is provided with a hole for accommodating the threaded part of the first screw.

In the first aspect, a first spring is provided along the first screw between the rotation inhibitor and the second jaw, and a second spring is provided along the second screw between the fourth jaw and the base.

According to a first aspect of embodiments of the present invention there is provided an angle-adjustable orthopaedic external fixation device comprising one or more first clamping assemblies adapted to capture a first element of an external fixation system, one or more of the first clamping assemblies being coupled to a third clamping assembly adapted to capture a third element of the external fixation system via a rotation assembly such that the coupling allows rotation of the first clamping assembly about its own axis and about the axis of rotation of the rotation assembly shaft.

In the second aspect, the first clamping assembly includes: a first jaw; a second clamping jaw arranged opposite to the first clamping jaw to form a containing part for clamping the first element therebetween, wherein the bottom of the second clamping jaw is provided with an anti-rotation surface; and a first screw extending through the first jaw, the second jaw and defining an axis.

In the second aspect, the third clamping assembly has a plurality of parallel grooves for clamping the third member and an anti-rotation surface, and is connected to the rotating assembly by another screw.

In the second aspect described above, the rotation assembly is connected to the first clamping assembly via a rotation inhibitor, the rotation inhibitor upper surface being a surface adapted to complement an anti-rotation surface of the first clamping assembly.

In the second aspect, the rotating assembly includes:

a base having a hole therein for receiving the threaded portion of the other screw, the lower surface of the base being a surface adapted to complement the anti-rotation surface of the third clamping assembly; and

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

Fig. 1 shows an exploded view of a first embodiment of the angle-adjustable orthopaedic external fixation device of the present invention.

Fig. 2 shows an assembly view according to the embodiment of fig. 1.

Fig. 3 shows a view from above of the embodiment according to fig. 1.

Fig. 4 shows a cross-sectional view taken along line A-A of fig. 3 according to the embodiment of fig. 1.

Fig. 5 shows a cross-sectional view taken along line B-B of fig. 3 according to the embodiment of fig. 1.

Fig. 6 shows an exploded view of a second embodiment of the angle-adjustable orthopaedic external fixation device of the present invention.

Fig. 7 shows an assembly view of the embodiment according to fig. 6.

Detailed Description

Fig. 1 shows an exploded view of a first embodiment of the angle-adjustable orthopaedic external fixation device of the present invention. The external fixation device comprises a first clamping assembly 10, a second clamping assembly 20, a rotation assembly 30. The rotating assembly 30 is coupled to the first clamping assembly 10 and the second clamping assembly 20 such that the coupling allows the first clamping assembly 10 to rotate about its own axis 107 and the axis 305 of the rotating shaft of the rotating assembly 30, and the second clamping assembly 20 to rotate about its own axis 207.

The first clamping assembly 10 comprises a first clamping jaw 100 and a second clamping jaw 101, the first clamping jaw 100 and the second clamping jaw 101 having

central apertures

102, 103, respectively. A first screw 104 for locking the first clamp assembly 10 is inserted through the

holes

102, 103. The first screw 104 enters the first jaw 100 via a first locking element 105, the first locking element 105 being accommodated in a recess 106 of the first jaw 100. The first screw 104 defines a longitudinal axis 107 of the

jaws

100, 101. The bottom of the second jaw 101 (the side facing away from the first jaw 100) is an anti-rotation surface 108, which anti-rotation surface 108 may be formed by a groove located radially around the central hole 103.

The second clamping assembly 20 comprises a third jaw 200 and a fourth jaw 201, the third jaw 200 and the fourth jaw 201 having

central apertures

202, 203, respectively. A second screw 204 for locking the second clamping assembly 20 is inserted through the

holes

202, 203. The second screw 204 enters the third jaw 200 via a second locking element 205, which second locking element 205 is accommodated in a recess 206 of the third jaw 200. The second screw 204 defines a longitudinal axis 207 of the

jaws

200, 201. The bottom of the fourth jaw 201 (the side facing away from the third jaw 200) is an anti-rotation surface 208, which anti-rotation surface 208 may be formed by a groove located radially around the central bore 203.

Fig. 2 shows an assembled view of the embodiment according to fig. 1, from which it can be seen that the

clamping assemblies

10, 20 respectively comprise a receiving

portion

109, 209 for receiving a rod or pin of an external fixation system. The number, shape, and size of the

receptacles

109, 209 on the

clamp assemblies

10, 20 are not limited in this application.

Referring to fig. 1 to 5, the two clamp assemblies 10, 20 are connected to the rotating assembly 30 via threaded portions of

screws

104, 204, respectively. The rotating assembly 30 includes a base 300, a rotating shaft 301, and two

disks

302 and 303. The

discs

302, 303 are located on the base 300 and may be integrally formed. The two ends of the rotation shaft 301 are arranged on the

discs

302, 303, the part of the rotation shaft 301 between the

discs

302, 303 is provided with a hole 304, the hole 304 is internally provided with internal threads matching with the external threads of the first screw 104, and the hole 304 is used for accommodating the threaded part of the first screw 104 of the first clamping assembly 10. The spindle 301 defines an axis of rotation 305 of the rotating assembly 30, and the

longitudinal axes

107, 207 of the two

clamp assemblies

10, 20 connected by the rotating assembly 30 intersect the axis 305 defined by the spindle 301 midway between the

discs

302, 303. The circumferential surfaces 309 of the

discs

302, 303 are anti-rotation surfaces, for example grooves tangential to the cylindrical surfaces of the discs.

The rotation assembly 30 is connected to the first clamping assembly 10 via a rotation inhibitor 40. The rotation inhibitor 40 includes a central aperture 400 that receives the first screw 104. The upper surface 401 of the rotation inhibitor 40 (the side facing the second jaw 101) is at least partially complementary to the anti-rotation surface 108 of the first clamping assembly 10, i.e. the upper surface 401 has a groove located radially around the central aperture 400. The lower surface 402 of the rotation preventing member 40 (the side facing the discs 302, 303) is an arcuate surface with grooves distributed therein for contact complementation with the anti-rotation surface 309 of the

discs

302, 303.

The base 300 of the rotating assembly 30 has a hole 307 therein, the hole 307 has internal threads matching the external threads of the second screw 204, and the hole 307 is utilized to receive the threaded portion of the second screw 204 of the second clamping assembly 20. The lower surface 306 of the base 300 is at least partially complementary to the anti-rotation surface 208 of the second clamp assembly 20, i.e. the lower surface 306 has a groove located radially around the hole 307.

The first clamping assembly 10 the length of the first screw 104 is adapted to be screwed into the hole 304 after traversing the first locking element 105, the first jaw 100, the second jaw 101, the rotation inhibitor 40.

The second clamping assembly 20 the length of the second screw 204 is adapted to be screwed into the hole 307 after traversing the second locking element 205, the third jaw 200, the fourth jaw 201.

In the embodiment shown in fig. 1 and 2, the

clamping assemblies

10, 20 include a first spring 110, a second spring 210, respectively. The first spring 110 of the clamping assembly 10 is located within the spring receiving cavity 111 of the second jaw 101 and/or the rotation inhibitor 40 and is disposed along the first screw 104 between the rotation inhibitor 40 and the second jaw 101. The second spring 210 of the clamping assembly 20 is located within the spring receiving cavity 211 of the fourth jaw 201 and/or base 300 and is disposed along the second screw 204 between the fourth jaw 201 and the base 300.

If the first screw 104 is unscrewed, the

jaws

100, 101 can be pushed apart translationally one with respect to the other and can optionally pivot against the force of the respective spring 110, thus ensuring that the pin or rod can be easily snapped into the housing 109 initially. Similarly, if the second screw 204 is unscrewed, the

jaws

200, 201 can be pushed apart translationally one with respect to the other and can be pivoted selectively against the force of the respective spring 210, thus ensuring that the pin or rod can be easily snapped into the housing 209 initially.

Springs

110, 210 enable a practitioner using the apparatus of the present invention to freely and independently rotate

clamp assemblies

10, 20 about

longitudinal axes

107, 207. Where

longitudinal axes

107, 207 are the directional axes of

screws

104, 204, respectively. The

springs

110, 210 are compression springs. One or a bundle of belleville washers may also be provided as spring elements.

The first screw 104 is unscrewed and after the first clamping assembly 10 has been rotated to the correct angle about its own axis 107, the rod or pin is snapped into the receiving portion 109 of the first clamping assembly 10. The corresponding first screw 104 is then slightly tightened such that the anti-rotation surface 108 of the second jaw 101 and the upper surface 401 of the rotation inhibitor 40 are in contact, and the lower surface 402 of the rotation inhibitor 40 and the anti-rotation surfaces 305 of the

discs

302, 303 are in contact, but still allow the first clamp assembly 10 to rotate about the axis 305 of the rotation assembly 30, after angular adjustment to the correct position, the screw 104 of the first clamp assembly 10 is fully tightened. After unscrewing the second screw 204 and rotating the second clamping assembly 20 to the correct angle about its own axis 207, the rod or pin is snapped into the receiving portion 209 of the second clamping assembly 20, fully tightening the screw 104 of the first clamping assembly 10.

Fig. 6 and 7 show an exploded view, an assembled view of a second embodiment of the angle adjustable orthopaedic external fixation device of the present invention, in which a third clamping assembly 50 is provided. The third clamping assembly 50 is a multi-pin clamping member having a plurality of receptacles 500 for retaining pins. The accommodating portion 500 is provided as parallel grooves, but may be formed as grooves having different shapes. The third clamping assembly 50 has two catches 501 and a third screw 502 for connecting the two catches 501. A third clamping assembly 50 may be assembled with one or more first clamping assemblies 10, which are connected by a rotating assembly 30 to accommodate the construction of complex external fixation systems. Catch 501 is attached to base 300 of swivel assembly 30 by fourth screw 503. The hole 307 in the base 300 is used to receive the threaded portion of the fourth screw 503. The first clamping unit 10 and the rotating unit 30 are shown to be disposed on both grips 501, and it should be noted that the first clamping unit 10 and the rotating unit 30 may be disposed on only one grip 501. The present invention is also not limited to the number of first clamping members 10 and rotating members 30 provided on each grip 501. In addition, catch 501 has an anti-rotation surface 504 thereon that is complementary to lower surface 306 of base 300 of swivel assembly 30, and anti-rotation surface 504 may be a radially positioned slot around aperture 504 (traversed by screw 503).

Claims

1. An angle-adjustable orthopedic external fixation device, comprising:

a first clamping assembly (10) adapted to grip a first element of an external fixation system;

a second clamping assembly (20) adapted to grip a second element of the external fixation system; and

a rotation assembly (30) coupled to the first clamping assembly (10) and the second clamping assembly (20) such that the coupling allows rotation of the first clamping assembly (10) about its own axis (107) and the axis (305) of the rotation shaft (301) of the rotation assembly (30), and rotation of the second clamping assembly (20) about its own axis (207).

2. The angle-adjustable orthopaedic external fixation device of claim 1, wherein the first clamping assembly (10) comprises: a first jaw (100); a second jaw (101) arranged opposite to the first jaw (100) to form a housing (109) between them, the second jaw (101) having an anti-rotation surface (108) at the bottom; and a first screw (104) extending through the first jaw (100), the second jaw (101) and defining an axis (107);

the second clamping assembly (20) comprises: a third jaw (200); a fourth jaw (201) disposed opposite the third jaw (200) to form a receiving portion (209) therebetween for capturing the second element, the fourth jaw (201) having an anti-rotation surface (208) at a bottom thereof; and a second screw (204) extending through the third jaw (200), the fourth jaw (201) and defining an axis (207).

3. The angle adjustable orthopedic external fixation device of claim 2, wherein the rotation component (30) is coupled to the first clamp component (10) via a rotation inhibitor (40), the rotation inhibitor (40) upper surface (401) being a surface adapted to complement an anti-rotation surface (108) of the first clamp component (10).

4. An adjustable angle orthopaedic external fixation device according to claim 3, wherein the rotation assembly (30) comprises:

a base (300) having a hole (307) for receiving the threaded portion of the second screw (204), the lower surface (306) of the base (300) being a surface adapted to contact a complementary surface of the anti-rotation surface (208) of the second clamping assembly (20); and

two discs (302, 303) arranged on the upper surface of the base (300), the circumferential surface (309) of the discs (302, 303) being an anti-rotation surface adapted to complement the lower surface (402) of the rotation preventing member (40), wherein the two ends of the rotation shaft (301) are arranged on the discs (302, 303), and the portion of the rotation shaft (301) between the discs (302, 303) has a hole (304) for receiving the threaded portion of the first screw (104).

5. The angle-adjustable orthopaedic external fixation device of claim 4, wherein a first spring (110) is provided along the first screw (104) between the rotation inhibitor (40) and the second jaw (101), and a second spring (210) is provided along the second screw (204) between the fourth jaw (201) and the base (300).

6. An angular adjustable external fixation device for orthopaedics, characterized in that it comprises one or more first clamping assemblies (10) adapted to seize a first element of an external fixation system, the one or more first clamping assemblies (10) being coupled to a third clamping assembly (50) adapted to seize a third element of the external fixation system via a rotation assembly (30), such that said coupling allows rotation of the first clamping assembly (10) about its own axis (107) and about an axis (305) of the rotation shaft (301) of the rotation assembly (30).

7. The angle-adjustable orthopaedic external fixation device of claim 6, wherein the first clamping assembly (10) comprises: a first jaw (100); a second jaw (101) arranged opposite to the first jaw (100) to form a housing (109) between them, the second jaw (101) having an anti-rotation surface (108) at the bottom; and a first screw (104) extending through the first jaw (100), the second jaw (101) and defining an axis (107).

8. The angle adjustable orthopedic external fixation device of claim 7, wherein the third clamping assembly (50) has a plurality of parallel grooves (500) that capture the third member and an anti-rotation surface (504), the third clamping assembly (50) being coupled to the rotating assembly (30) by a screw (503).

9. The angle adjustable orthopedic external fixation device of claim 8, wherein the rotation component (30) is coupled to the first clamp component (10) via a rotation inhibitor (40), the rotation inhibitor (40) upper surface (401) being a surface adapted to complement an anti-rotation surface (108) of the first clamp component (10).

10. The angle-adjustable orthopedic external fixation device of claim 9, characterized in that the rotation assembly (30) comprises:

a base (300) having a hole (307) for receiving the threaded portion of the screw (503), the lower surface (306) of the base (300) being a surface adapted to complement the anti-rotation surface (504) of the third clamping assembly (50); and