CN215349179U

CN215349179U - Screw for surgical operation

Info

Publication number: CN215349179U
Application number: CN202120243143.0U
Authority: CN
Inventors: 梁杰
Original assignee: Beijing Tiantan Hospital
Current assignee: Beijing Tiantan Hospital
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-12-31
Anticipated expiration: 2031-01-28

Abstract

The present invention relates to a surgical screw comprising: the nail head is provided with a nail head through hole; the nail body is internally provided with an inner cavity communicated with the nail head through hole, and the outer wall of the nail body is provided with a thread structure and is detachably connected with the nail head; the supporting part comprises a fixed end and a movable end; wherein, the nail body and the nail head surround to form an accommodating part which is communicated with the inner cavity; the fixed end is embedded into the accommodating part, and a gap is formed between the fixed end and the accommodating part; the movable end extends out of the accommodating part and is suitable for driving the fixed end to rotate in the accommodating part by moving up and down. The screw for surgical operation can stably connect and fix soft tissues and bones, and effectively avoid the loosening or loosening of the soft tissues and the bones.

Description

Screw for surgical operation

Technical Field

The utility model relates to the field of medical instruments, in particular to a screw for surgical operation.

Background

Complete or partial detachment of ligaments, tendons, and/or other soft tissue from associated bone in vivo is a relatively common injury. Such damage is often caused by tissue being subjected to excessive pressure, for example, as a result of a fall, excessive exertion, or other accident.

In such cases, it is common to clinically reconnect the soft tissue to the bone with a threaded anchor or screw for the purpose of promoting healing of the tendon bone. Therefore, effective and stable fixation between soft tissue and bone by means of an anchor or screw is a key to the success of ligament or tendon repair surgery, and the postoperative recovery and exercise needs of the patient can be met only if good fixation of the anchor or screw is ensured.

Disclosure of Invention

The utility model provides the following technical scheme for solving the defects in the prior art.

A surgical screw comprising: the nail head is provided with a nail head through hole; the nail body is internally provided with an inner cavity communicated with the nail head through hole, and the outer wall of the nail body is provided with a thread structure and is detachably connected with the nail head; the thread structure comprises a first thread structure and a second thread structure which are arranged up and down, a first distance is arranged between any two adjacent first thread structures, a second distance is arranged between any two adjacent second thread structures, and the second distance is 1.6 times to 1.8 times of the first distance.

Further, the surgical screw further includes: the supporting part comprises a fixed end and a movable end, and the movable end is provided with a suture line through hole; the nail body and the nail head surround to form an accommodating part, and the accommodating part is communicated with the inner cavity; the fixed end is embedded into the accommodating part, and a gap is formed between the fixed end and the accommodating part; the movable end extends outwards from the accommodating part and is suitable for driving the fixed end to rotate in the accommodating part by moving up and down.

Furthermore, a first cambered surface is formed at the lower end of the nail head, a second cambered surface is formed at the upper end of the nail body, and the first cambered surface and the second cambered surface are encircled to form the hemispherical accommodating part; the shape of the fixed end is matched with that of the accommodating part.

Furthermore, the nail body is in threaded connection with the nail head.

Further, a recessed area is formed at the bottom of the inner cavity, and an internal thread is formed in the recessed area; the lower end of the nail head is provided with a connecting part, and an external thread matched with the internal thread is formed on the connecting part; the connecting part is suitable for penetrating through the inner cavity and rotatably extending into the depressed area, so that the nail head is in threaded connection with the nail body.

Furthermore, the connecting part is provided with a connecting part through hole, and the connecting part through hole is communicated with the inner cavity.

Furthermore, a first nail body through hole and a second nail body through hole are formed in the side wall of the nail body, and the first nail body through hole and the second nail body through hole are communicated with the inner cavity respectively.

Furthermore, the number of the first through holes of the nail body is multiple, and the first through holes are arranged around the central axis of the nail body at equal intervals in the circumferential direction of the nail body; and/or, the quantity of nail body second through-hole is a plurality of, and with the axis of nail body is the center, encircles the setting of the circumference direction equidistance ground interval of nail body.

Furthermore, the nail head through hole comprises a first nail head through hole and a second nail head through hole, and the first nail head through hole and the second nail head through hole are symmetrically arranged on two sides of the central axis of the nail head.

The utility model has the beneficial effects that: because the thread structures comprise the first thread structures and the second thread structures which are arranged up and down, and the distance between the second thread structures is 1.6 times to 1.8 times of the distance between the first thread structures, when the screw for the surgical operation is used, the lower half part of the screw can be tightly embedded into human tissues, and the upper half part of the screw for the surgical operation can effectively ensure that the screw for the surgical operation is not easy to loosen or move. Therefore, the screw for the surgical operation can stably connect and fix the soft tissue and the bone, and is particularly suitable for ensuring the tight connection of the soft tissue and the bone and effectively avoiding the loosening or loosening of the soft tissue and the bone under the condition that a patient moves or an external force is applied to an affected part.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly described below. Wherein the drawings are only for purposes of illustrating some embodiments of the utility model and are not to be construed as limiting the utility model to all embodiments thereof.

FIG. 1: a front view of a surgical screw of one embodiment of the present invention;

FIG. 2: a cross-sectional view of a surgical screw of one embodiment of the present invention;

FIG. 3: an enlarged partial view of a surgical screw according to one embodiment of the present invention.

Reference numerals:

the nail comprises a nail head-1, a nail body-2, a supporting part-3, a containing part-4, a suture-5, a first through hole-11 of the nail head, a second through hole-12 of the nail head, a connecting part-13, a through hole-14 of the connecting part, a first cambered surface-15, a first thread structure-21, a second thread structure-22, a nail tail-23, a first through hole-24 of the nail body, a second through hole-25 of the nail body, a second cambered surface-26, a fixed end-31 and a movable end-32.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model.

Referring to fig. 1 to 3, an embodiment of the present invention provides a surgical screw including: a nail head 1, a nail body 2 and a support part 3.

The nail head 1 is provided with a nail head through hole. An inner cavity is arranged inside the nail body 2. The nail head through hole is communicated with the inner cavity. The outer wall of the nail body 2 is provided with a thread structure, and the thread structure comprises a first thread structure 21 and a second thread structure 2. The thread structure comprises a first thread structure 21 and a second thread structure 22 which are arranged up and down, a first distance is arranged between any two adjacent first thread structures 21, a second distance is arranged between any two adjacent second thread structures 22, and the second distance is 1.6 times to 1.8 times of the first distance.

The shank 2 and the head 1 are detachably connected to each other. The end of the nail body 2 far away from the nail head 1 is provided with a nail tail 23.

The nail body 2 and the nail head 1 surround to form an accommodating part 4, and the accommodating part 4 is communicated with the inner cavity. The support portion 3 comprises a fixed end 31 and a movable end 32, the movable end 32 being provided with a suture through-hole. The fixing end 31 is fitted into the accommodating portion 4, and a gap is formed between the fixing end 31 and the accommodating portion 4. The movable end 32 extends outward from the accommodating portion 4 and is adapted to move up and down to drive the fixed end 31 to rotate in the accommodating portion 4.

When the suture inserting device is used, a suture 5 extends into the inner cavity communicated with the nail head through hole from the nail head through hole, extends into the accommodating part 4 communicated with the inner cavity through the inner cavity, extends into the suture through hole on the movable end 32 from the suture 5 extending into the accommodating part 4 communicated with the inner cavity, extends into the inner cavity again from the accommodating part 4, and extends out from the nail head through hole in the inner cavity.

According to the technical scheme provided by the embodiment of the utility model, the surgical screw can stably connect and fix soft tissues and bones, and the suture line 5 can extend out from the upper part of the nail head 1 after penetrating through the supporting part 3, so that under the condition that a patient moves or an affected part is subjected to external force, the suture line 5 is stressed and drives the supporting part 3 to rotate and expand, the anti-pulling performance of the surgical screw is improved, the tight connection of the soft tissues and the bones is ensured, and the loosening or loosening of the surgical screw is effectively avoided. In addition, because a gap is formed between the fixed end 31 and the accommodating part 4, and the movable end 32 moves up and down to drive the fixed end 31 to rotate in the accommodating part 4, the suture thread 5 cannot be pressed or abraded in the rotating and spreading process of the supporting part 3, so that the fracture of the suture thread 5 is effectively avoided, and the treatment safety is improved.

Example 1

On the basis of the above technical solution, the present embodiment further includes the following technical features:

a first cambered surface 15 is formed at the lower end of the nail head 1, a second cambered surface 26 is formed at the upper end of the nail body 2, and the hemispherical accommodating part 4 is formed by the first cambered surface 15 and the second cambered surface 26 in a surrounding manner; the shape of the fixing end 31 is adapted to the shape of the accommodating portion 4.

Through the technical scheme, the rotation of the fixed end 31 in the accommodating part 4 can be facilitated, the friction between the fixed end 31 and the accommodating part 4 is reduced, and the supporting part 3 can be easily and accurately driven to be unfolded by pulling the suture 5. In addition, the above technical solution can stably and effectively fix the fixing end 31, and prevent the fixing end 31 from being released from the accommodating portion 4.

Example 2

On the basis of any one of the above technical solutions, the present embodiment further includes the following technical features:

the nail body 2 is in threaded connection with the nail head 1.

Specifically, a recessed area is formed at the bottom of the inner cavity, and an internal thread is formed in the recessed area; the lower end of the nail head 1 is provided with a connecting part 13, and an external thread matched with the internal thread is formed on the connecting part 13; the connecting part 13 is suitable for penetrating through the inner cavity and rotatably extending into the depressed area so as to enable the nail head 1 to be in threaded connection with the nail body 2.

During the use, with the supporting part 3 imbeds the second cambered surface 26 to with the connecting portion 13 of pin head 1 from top to bottom stretches into the inner chamber of nail body 2, make through the rotation connecting portion 13 with depressed area threaded connection, along with increasing inseparable of threaded connection degree, pin head 1 and supporting part 3 are close to gradually, until form the space size between first cambered surface 15 and the second cambered surface 26 and be fit for accommodate the portion 4.

Through the technical scheme, the rapid installation and connection of the nail body 2 and the nail head 1 can be realized, the installation convenience degree of the supporting part 3 is improved, redundant parts are not needed, the fixing of the supporting part 3 can be realized, the processing and manufacturing of the screw for the surgical operation are facilitated, and the treatment safety is improved.

Preferably, the connecting portion 13 is provided with a connecting portion through hole 14, and the connecting portion through hole 14 is communicated with the inner cavity.

The connecting part through hole 14 is arranged to enable the suture 5 to extend from one side of the connecting part 13 to the other side of the connecting part 13, and the connection tightness degree of the suture 5 and the surgical screw is improved.

Example 3

the side wall of the nail body 2 is provided with a first nail body through hole 24 and a second nail body through hole 25, and the first nail body through hole 24 and the second nail body through hole 25 are communicated with the inner cavity respectively.

The provision of the body first through hole 24 and the body second through hole 25 enables the suture 5 to be extended from either one of the body first through hole 24 and the body second through hole 25 and from the other one of the body first through hole 24 and the body second through hole 25, thereby dispersing and balancing the stress and improving the firmness and reliability of the connection of the suture 5.

Preferably, the number of the nail body first through holes 24 is multiple, and the nail body first through holes are arranged around the central axis of the nail body 2 at equal intervals in the circumferential direction of the nail body 2; the quantity of nail body second through-hole 25 is a plurality of, and with the axis of nail body 2 is the center, encircles the setting of nail body 2's circumferential direction equidistance ground interval.

Example 4

the nail head through hole comprises a first nail head through hole 11 and a second nail head through hole 12, and the first nail head through hole 11 and the second nail head through hole 12 are symmetrically arranged on two sides of the central axis of the nail head 1.

The arrangement of said first and second stud through

holes

11, 12 enables the suture 5 to extend from either of said first and second stud through

holes

11, 12 and from the other of said first and second stud through

holes

11, 12, thereby further dispersing and balancing the stresses and improving the security and reliability of the connection of the suture 5.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various changes and modifications may be made to the specific embodiments described above and various combinations of the various features and structures proposed by the present invention may be made without departing from the concept of the present invention, the scope of which is defined by the appended claims.

Claims

1. A surgical screw, comprising:

the nail head (1) is provided with a nail head through hole;

the nail body (2) is internally provided with an inner cavity communicated with the nail head through hole, the outer wall of the nail body is provided with a thread structure and is detachably connected with the nail head (1), the nail body (2) and the nail head (1) are encircled to form an accommodating part (4), and the accommodating part (4) is communicated with the inner cavity;

the supporting part (3) comprises a fixed end (31) and a movable end (32), the movable end (32) is provided with a suture line through hole, the fixed end (31) is embedded into the accommodating part (4), a gap is formed between the fixed end (31) and the accommodating part (4), and the movable end (32) extends outwards from the accommodating part (4) and is suitable for driving the fixed end (31) to rotate in the accommodating part (4) through up-and-down movement;

the thread structure comprises a first thread structure (21) and a second thread structure (22) which are arranged up and down, a first distance is reserved between any two adjacent first thread structures (21), a second distance is reserved between any two adjacent second thread structures (22), and the second distance is 1.6 times to 1.8 times of the first distance.

2. Surgical screw according to claim 1,

the lower extreme of pin head (1) is formed with first cambered surface (15), the upper end of nail body (2) is formed with second cambered surface (26), enclose between first cambered surface (15) and second cambered surface (26) and form hemispherical holding portion (4), the shape of stiff end (31) with the shape looks adaptation of holding portion (4).

3. Surgical screw according to claim 1, characterized in that the shank (2) and the head (1) are screwed together.

4. A surgical screw according to any one of claims 1 to 3,

the side wall of the nail body (2) is provided with a first nail body through hole (24) and a second nail body through hole (25), and the first nail body through hole (24) and the second nail body through hole (25) are communicated with the inner cavity respectively.

5. Surgical screw according to claim 4,

the number of the nail body first through holes (24) is multiple, the nail body first through holes are arranged around the central axis of the nail body (2) at equal intervals in the circumferential direction of the nail body (2); and/or the presence of a gas in the gas,

the quantity of nail body second through-hole (25) is a plurality of, and with the axis of nail body (2) is the center, encircles the setting of the circumference direction equidistance ground interval of nail body (2).

6. A surgical screw according to any one of claims 1 to 3,

the nail head through hole comprises a first nail head through hole (11) and a second nail head through hole (12), and the first nail head through hole (11) and the second nail head through hole (12) are symmetrically arranged on two sides of a central axis of the nail head (1).