CN111329568B - Flexible combined fixing device for spine - Google Patents

Abstract

The invention relates to a flexible combined fixation device for the spine. In the present invention, each fixing nail can be connected to two connecting rods, so that the connection between adjacent fixing nails is very stable, and the connection between multiple fixing nails is relatively flexible, which is more suitable for actual spinal surgery. recovery. The two connecting rods are connected with the fixing nails, but there is a certain degree of elasticity and flexibility between the two connections. If you choose a spaced connection method, that is, three fixing nails are connected by two connecting rods, you can ensure a certain degree of flexibility. ; If you choose the way that two adjacent fixing nails are connected by two connecting rods, you can increase the stability of the connection and reduce the strength requirements of each connecting rod, so that the material selection and volume of the connecting rods can be adjusted. relax.

Description

A flexible combined fixation device for the spine

technical field

The invention relates to the field of medical instruments, in particular to a flexible combined fixation device for the spine.

Background technique

Scoliosis, commonly known as scoliosis, is a three-dimensional deformity of the spine, including sequence abnormalities in the coronal, sagittal and axial positions. The spine of a normal person should be straight when viewed from the back, and the sides of the trunk should be symmetrical. Severe scoliosis will affect the growth and development of infants and adolescents, deforming the body. In severe cases, it can affect the heart and lung function, and even involve the spinal cord, resulting in paralysis. Mild scoliosis can be observed, and severe cases require surgical treatment. Scoliosis is a common disease that endangers adolescents and children, and the key is early detection and early treatment. Severe scoliosis requires corrective surgery, which requires immobilization of the spine.

CN202942196U discloses a flexible spinal fixation device, which includes a fine-tuning knob, a flexible section, a positioning screw, a connecting cross bar and a locking screw. Two locking screws of the same form are the main parts of a spinal flexible fixation device. The lower part of the locking screw is a screw rod, and the screw rod is provided with threads. The upper end of the locking screw is a screw end, and the screw end is provided with a transverse through hole. Through the through holes on the two locking screws, a connecting cross bar is provided, the middle section of the connecting cross bar is set as a flexible section, and the two ends of the connecting cross bar are provided with fine-tuning knobs. Can provide long-term durability and stability for spinal flexible fixation.

The existing spinal fixation devices are all rigid fixed connections, but in actual use, because the connection between the spinal bone blocks needs to have a certain degree of elasticity, the purely rigid connection on the one hand recovers slowly, and on the other hand, the patient's actual There is a strong sense of discomfort during use.

Contents of the invention

In view of the above content, in order to solve the above problems, a flexible combined fixation device for the spine is provided, including fixation nails and connecting rods:

The number of fixing nails and the number of connecting rods are multiple. The fixing nails include a nail body and a nail head. The nail body is used to nail into the vertebra, and the nail head is used to fix the connecting rods; Consistent with the shape of the tail end; two fixing nails can be fixedly connected to the head end and tail end of a connecting rod, and each nail head can fix up to two connecting rods at one time;

The position where two connecting rods are connected on each fixing nail can independently lock the connecting rods, and the position where two connecting rods are connected on a single fixing nail is flexibly connected.

The nail body is nail-shaped, and there are threads on the surrounding wall, which can be screwed into the spine; one end of the nail body is provided with a nail head, and the nail head includes a nail head seat, a first fixing part and a second fixing part; the nail head seat and the nail body are integrally formed , the diameter in the axial direction is greater than the diameter of the nail body; the first fixing part is arranged on the nail head seat, and the first fixing part is two first ears protruding from the edge of the nail head seat along the axial direction of the nail head seat, and the two The connecting rod can be inserted perpendicular to the axial direction of the fixing nail between the two first ears, that is, the distance between the two first ears is greater than the diameter of the connecting rod; a thread is provided between the two first ears, which can be inserted along the fixing nail The axial direction of the first fixed block is screwed into the first fixed block, and the first fixed block is used to press the connecting rod inserted between the first ears.

The top of the first fixing part is provided with a second fixing part, and the second fixing part is composed of two second ears set in the same direction as the first ears, each second ear is connected to one first ear, and the two second ears The top of the top is fixedly connected, so that the tops of the two second ears form a complete circle; the connecting rod can be inserted between the two second ears; the second fixed block and the second fixed block can be screwed between the two second ears The third fixed block, the second fixed block and the third fixed block are used to press the connecting rod inserted between the second ears;

An I-shaped connecting block is set between the second ear and the first ear, and the section of the I-shaped connecting block is I-shaped; the first ear is fixedly connected to the bottom of the I-shaped block, and the bottom of the second ear is set to accommodate the top of the I-shaped block The size of the accommodation cavity can be adjusted by adjusting the screw on the top of the second ear, so that the connection between the I-shaped block and the second ear can be loosened, and the range of mutual movement can be adjusted.

An elastic material is arranged between the first ear and the second ear, and the elastic material wraps the mold block inside, so that the mutual movement of the second ear and the first ear is elastic.

The other ends of the connecting rod inserted between the first ears and the connecting rod inserted between the second ears are respectively connected to different fixing nails, so that the three fixing nails are connected by two connecting rods.

The other ends of the connecting rod inserted between the first ears and the connecting rod inserted between the second ears are respectively connected to the same fixing nails, so that the two fixing nails are connected by two connecting rods to increase stability.

In the present invention, each fixing nail can be connected to two connecting rods, so that the connection between adjacent fixing nails is very stable, and the connection between multiple fixing nails is relatively flexible, which is more suitable for actual spinal surgery. recovery.

The two connecting rods are connected with the fixing nails, but there is a certain degree of elasticity and flexibility between the two connections. If you choose a spaced connection method, that is, three fixing nails are connected by two connecting rods, you can ensure a certain degree of flexibility. ; If you choose the way that two adjacent fixing nails are connected by two connecting rods, you can increase the stability of the connection and reduce the strength requirements of each connecting rod, so that the material selection and volume of the connecting rods can be adjusted. Relaxed, and there is no binding between different groups of fixation nails, making postoperative recovery more comfortable.

Description of drawings

The accompanying drawings, which are included to provide a further understanding of the disclosed subject matter, are incorporated in and constitute a part of this specification. The drawings also illustrate implementations of the disclosed subject matter and, together with the detailed description, serve to explain implementation principles of the disclosed subject matter. No attempt has been made to reveal more structural detail than is necessary for a fundamental understanding of the disclosed subject matter and its various ways of practicing it.

Fig. 1 is the schematic diagram of fixing nail and connecting rod of the present invention;

Fig. 2 is the schematic diagram of the nail head of fixing nail;

Fig. 3 is a schematic diagram of different connection modes of the fixing nail and the connecting rod in the present invention.

Detailed ways

The advantages, characteristics, and means for achieving the object of the present invention will be clarified by the accompanying drawings and detailed descriptions that follow.

Example 1:

A flexible combined fixation device for the spine, including fixation nails 1 and connecting rods 2:

The number of fixing nails 1 and the number of connecting rods 2 are multiple. The fixing nails 1 include a nail body 3 and a nail head 4. The nail body 3 is used to nail into the vertebra, and the nail head 4 is used to fix the connecting rod 2; the connecting rod 2 Including the head end and the tail end, the shape of the head end and the tail end is consistent; two fixing nails 1 can be fixedly connected to the head end and tail end of a connecting rod 2, and each nail head 4 can fix up to two connecting rods 2 at one time ;

The position where two connecting rods 2 are connected on each fixing nail 1 can lock the connecting rods 2 independently, and the position where two connecting rods 2 are connected on a single fixing nail 1 is flexibly connected.

The nail body 3 is nail-shaped, and the peripheral wall is provided with threads, which can be screwed into the vertebrae; one end of the nail body 3 is provided with a nail head 4, and the nail head 4 includes a nail head seat 41, a first fixing part 42 and a second fixing part 43; Head seat 41 and nail body 3 are integrally formed, and its axial diameter is greater than the diameter of nail body 3; With the axially protruding first ear 44 of the nail head seat 41, the connecting rod 2 can be inserted between the two first ears 44 perpendicular to the axial direction of the fixing nail 1, that is, the distance between the two first ears 44 is greater than that of the connecting rod. The diameter of the rod 2; threads are provided between the two first ears 44, and the first fixing block 45 can be screwed into the first fixing block 45 along the axial direction of the fixing nail 1, and the first fixing block 45 is used to press between the first ears 44 Insert the connecting rod 2.

The top of the first fixing part 42 is provided with a second fixing part 43, the second fixing part 43 is composed of two second ears 46 arranged in the same direction as the first ears 44, and each second ear 46 is connected to one first ear 44 , and the tops of the two second ears 46 are fixedly connected, so that the tops of the two second ears 46 form a complete ring; the connecting rod 2 can be inserted between the two second ears 46; the two second The second fixing block 47 and the third fixing block 48 can be screwed in between the ears 46, and the second fixing block 47 and the third fixing block 48 are used to press the connecting rod 2 inserted between the second ears 46;

I-shaped connecting block 49 is set between the second ear 46 and the first ear 44, and the cross section of I-shaped connecting block 49 is I-shaped; the bottom edge of the first ear 44 and the I-shaped block is fixedly connected, and the bottom of the second ear 46 is arranged Can accommodate the accommodating cavity at the top of the I-shaped block, and the size of the accommodating cavity can be adjusted by adjusting the screw 50 at the top of the second ear 46, so that the I-shaped block and the second ear 46 can be loosely connected, and they can move mutually range can be adjusted.

An elastic material is provided between the first ear 44 and the second ear 46 , and the elastic material wraps the mold block inside, so that the mutual movement of the second ear 46 and the first ear 44 is elastic.

The other ends of the connecting rods 2 inserted between the first ears 44 and the connecting rods 2 inserted between the second ears 46 are respectively connected to different fixing nails 1, so that the three fixing nails 1 are connected by two connecting rods 2 .

The other end of the connecting rod 2 inserted between the first ear 44 and the connecting rod 2 inserted between the second ear 46 is respectively connected to the same fixing nail 1, so that the two fixing nails 1 are connected by two connecting rods 2 , increasing stability.

Example 2:

This example introduces a simple method of use:

When in use, drill holes in the spine first, and then insert the fixation nails. Other operations before placing the fixation nails will not be repeated here;

After placement, the fixation nails are firmly connected to the vertebrae, and then a connecting rod is inserted between two adjacent fixation nails, and the first fixing block is screwed in to fix the connecting rod;

Then screw into the second fixed block, insert the second connecting rod, screw into the third fixed block, and adopt the other end of the connecting rod 2 inserted between the first ear 44 and the second ear 46 to insert the connecting rod 2 respectively Different fixation nails 1 are connected, so that the three fixation nails 1 are connected by two connecting rods 2 to connect each spinal bone, so that there is a stable fixed connection between adjacent vertebrae, and the adjacent three Slight movement can be generated between the vertebrae to achieve flexible connection, thereby improving the flexibility of the connection and being more suitable for actual use and recovery.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (3)

1. The utility model provides a flexible combined fixing device of backbone, includes staple (1) and connecting rod (2), its characterized in that:

the number of the fixing nails (1) and the number of the connecting rods (2) are multiple, each fixing nail (1) comprises a nail body (3) and a nail head (4), the nail body (3) is used for being nailed into the vertebra, and the nail head (4) is used for fixing the connecting rods (2); the connecting rod (2) comprises a head end and a tail end, and the head end and the tail end are consistent in shape; the two fixing nails (1) can be fixedly connected with the head end and the tail end of one connecting rod (2), and each nail head (4) can fix the two connecting rods (2) at one time;

the positions of the two connecting rods (2) connected on each fixing nail (1) can be independently used for locking the connecting rods (2), and the positions of the two connecting rods (2) connected on the single fixing nail (1) are flexibly connected;

the nail body (3) is in a nail shape, and the peripheral wall is provided with threads which can be screwed into the vertebra; one end of the nail body (3) is provided with a nail head (4), and the nail head (4) comprises a nail head seat (41), a first fixing part (42) and a second fixing part (43); the nail head seat (41) and the nail body (3) are integrally formed, and the axial diameter of the nail head seat is larger than that of the nail body (3); the nail head seat (41) is provided with a first fixing part (42), the first fixing part (42) comprises two first lugs (44) which protrude axially along the nail head seat (41) from the edge of the nail head seat (41), the connecting rod (2) can be inserted between the two first lugs (44) in a manner of being perpendicular to the axial direction of the fixing nail (1), namely, the distance between the two first lugs (44) is greater than the diameter of the connecting rod (2); threads are arranged between the two first lugs (44), the first fixing blocks (45) can be screwed in along the axial direction of the fixing nail (1), and the first fixing blocks (45) are used for pressing the connecting rods (2) inserted between the first lugs (44);

a second fixing part (43) is arranged at the top of the first fixing part (42), the second fixing part (43) consists of two second ears (46) which are arranged in the same direction as the first ears (44), each second ear (46) is connected to one first ear (44), and the tops of the two second ears (46) are fixedly connected, so that the tops of the two second ears (46) form a complete circular ring; the connecting rod (2) can be inserted between the two second ears (46); a second fixing block (47) and a third fixing block (48) can be screwed between the two second lugs (46), and the second fixing block (47) and the third fixing block (48) are used for pressing the connecting rod (2) inserted between the second lugs (46);

an I-shaped connecting block (49) is arranged between the second lug (46) and the first lug (44), and the section of the I-shaped connecting block (49) is I-shaped; the first ear (44) is fixedly connected with the bottom edge of the I-shaped block, the bottom of the second ear (46) is provided with a containing cavity capable of containing the top of the I-shaped block, and the size of the containing cavity can be adjusted by adjusting a screw (50) at the top of the second ear (46), so that the I-shaped block and the second ear (46) can be connected in a loose way, and the mutual moving range can be adjusted;

an elastic material is disposed between the first ear (44) and the second ear (46), and the elastic material encases the drum-shaped block, thereby providing elasticity for the second ear (46) and the first ear (44) to move relative to each other.

2. The flexible modular fixture of claim 1 wherein:

the other ends of the connecting rods (2) inserted between the first lugs (44) and the connecting rods (2) inserted between the second lugs (46) are respectively connected with different fixing nails (1), so that the three fixing nails (1) are connected by the two connecting rods (2).

3. A flexible modular fixture as claimed in claim 1 wherein:

the other end of the connecting rod (2) inserted between the first lug (44) and the other end of the connecting rod (2) inserted between the second lug (46) are respectively connected with the same fixing nail (1), so that the two fixing nails (1) are connected through the two connecting rods (2), and the stability is improved.

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