Elastic intramedullary needle device for eliminating locking gap

Abstract

The utility model relates to an elastic intramedullary needle device for eliminating a locking gap, which comprises a sealing disc, a first expansion sleeve is arranged at the top of the sealing disc, a second expansion sleeve is arranged at the top of the first expansion sleeve, and a limiting sleeve is arranged at the top of the second expansion sleeve. According to the elastic intramedullary needle device capable of eliminating the locking gap, the sealing disc is arranged, and the sealing disc, the first expansion sleeve and the second expansion sleeve which are connected with the sealing disc pass through the locking holes at the same time and are inserted into a bone; when the elastic intramedullary needle body extends into the bone, the top end of the elastic intramedullary needle body pushes the second expansion sleeve and the first expansion sleeve outwards in sequence, so that the cross-shaped opening is gradually enlarged, and the elastic intramedullary needle body can extend out of the expansion sleeves; and after the occupied area of the first expansion sleeve and the second expansion sleeve is increased, the exterior of the elastic intramedullary needle body is further continuously fixed, so that the firm compression and fixation of the postoperative fracture surface can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of elastic intramedullary nails, in particular to an elastic intramedullary nail device for eliminating locking gaps. Background Art

[0002] The intramedullary nail is a special tool used to support and treat fractures during orthopedic surgery. It plays an extremely important role. In its specific application, the intramedullary nail mainly utilizes the good elastic recovery force of titanium alloy or stainless steel to convert the force acting on the bone into thrust and pressure through the three contact points of the medullary cavity, thereby reducing the fracture and having enough force to resist the reduction position of the fracture. The elastic intramedullary nail is also called titanium elastic intramedullary nail, which mainly contains titanium metal components, so its texture is relatively soft and its hardness is not as good as that of the Kirschner wire, but it has better elasticity than the Kirschner wire, so it can form three-point fixation when placed in the medullary cavity.

[0003] According to a threaded elastic intramedullary nail mentioned in Chinese patent application No. 202222252755.3, when the threaded elastic intramedullary nail is used, the first pressurized thread and the second pressurized thread can be respectively located at the two ends of the fracture line when the intramedullary needle body is screwed into the medullary cavity, thereby exerting a pressurized fixation effect on the wound surface, effectively enhancing the product's pressurized fixation effect on the fracture site. However, the thread of the threaded elastic intramedullary nail has the advantage of a better pressurized fixation effect when used. On the contrary, the setting of the thread easily makes it difficult for the surgeon to extend the elastic intramedullary nail to the top of the fractured bone along the designated route, thereby prolonging the duration of the surgical operation.

[0004] In the prior art, after the elastic intramedullary needle is inserted into the human bone fracture, the end of the elastic intramedullary needle is locked by a screw nut. Although this method is relatively efficient and has good operating efficiency, since the intramedullary needle locking hole generated when opening the bone fracture is much larger than the diameter of the elastic intramedullary needle and the screw nut, there is a large gap between the screw nut and the intramedullary needle locking hole, resulting in obvious rotational instability at the fracture end, thereby affecting and causing fracture non-union. Therefore, it is necessary to propose an elastic intramedullary needle device that eliminates the locking gap to solve the above-mentioned problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an elastic intramedullary nail device for eliminating locking gaps. The device has an elastic intramedullary nail capable of eliminating the gap between the screw nut and the locking hole of the intramedullary nail, which can achieve firm pressurized fixation of the fracture surface after surgery, greatly reducing the instability of the elastic intramedullary nail after installation, and is more conducive to fracture healing.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an elastic intramedullary nail device for eliminating locking gap, comprising a sealing disk, a first expansion sleeve is arranged on the top of the sealing disk, a second expansion sleeve is arranged on the top of the first expansion sleeve, a limiting sleeve is arranged on the top of the second expansion sleeve, a connecting sleeve is fixedly installed inside the sealing disk, a through hole is opened at the bottom of the connecting sleeve, and a nut is threadedly connected to the outside of the through hole.

[0007] Furthermore, the number of the first expansion sleeve, the second expansion sleeve and the limiting sleeve is set to four groups, and cross gaps are formed between the four groups of limiting sleeves.

[0008] Furthermore, an annular through groove is formed between the four groups of the first expansion sleeves and the second expansion sleeves, and an elastic intramedullary nail body is arranged inside the first expansion sleeves and the second expansion sleeves.

[0009] Furthermore, the size of the annular through groove is adapted to the size of the elastic intramedullary needle body, the top of the elastic intramedullary needle body is the top end, and the bottom of the elastic intramedullary needle body is the end end.

[0010] Furthermore, an inner threaded ring and an outer threaded ring are provided at the bottom of the screw nut, the inner threaded ring is threadedly connected to the inner wall of the through hole, the outer threaded ring is threadedly connected to the outer wall of the through hole, and the screw nut is flush with the level of the sealing disk.

[0011] Furthermore, the four groups of limiting sleeves are all in contact with the outer wall of the elastic intramedullary nail body, and the sealing disk is made of silica gel.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] The elastic intramedullary nail device for eliminating locking gap is provided with a sealing disk. When in use, the surgical operator uses a bone awl to open a locking hole on the side of the patient's bone, the size of which is compatible with the sealing disk, and simultaneously passes the first expansion sleeve and the second expansion sleeve connected to the sealing disk through the locking hole and are inserted into the interior of the bone. Through human operation, the top ends of the two elastic intramedullary nail bodies are extended to the topmost part of the interior of the bone. When the elastic intramedullary nail body extends toward the interior of the bone, the top end of the elastic intramedullary nail body will push the second expansion sleeve and the first expansion sleeve outward in turn, causing the cross notch to gradually become larger, thereby achieving the elastic intramedullary nail body being able to It extends out of the interior of the expansion sleeve, and after the occupied area of ​​the first expansion sleeve and the second expansion sleeve becomes larger, the outside of the elastic intramedullary needle body will be further fixed continuously, so that the postoperative fracture surface can be firmly pressurized and fixed, which greatly reduces the instability caused by the movement of the elastic intramedullary needle body and is more conducive to fracture healing; and by setting a screw nut, the screw nut is installed at the surface that fits the sealing disk, and the inner circle threaded ring and the outer circle threaded ring are set, and the screw nut is threadedly installed in the interior of the connecting sleeve, thereby completing the locking of the end of the elastic intramedullary needle body, and further eliminating the gap between the installation screw nut and the locking hole of the elastic intramedullary needle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the elastic intramedullary nail structure of the utility model;

[0015] Figure 2 This is a structural expansion diagram of the elastic intramedullary nail of the utility model when in operation;

[0016] Figure 3 This is a bottom sectional view of the elastic intramedullary nail structure of the utility model.

[0017] In the figure: 1, sealing disk; 2, first expansion sleeve; 3, second expansion sleeve; 4, limiting sleeve; 5, cross notch; 6, annular groove; 7, elastic intramedullary nail body; 8, top; 9, end; 10, connecting sleeve; 11, through hole; 12, screw nut; 13, inner circle threaded ring; 14, outer circle threaded ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3In this embodiment, an elastic intramedullary nail device for eliminating locking gap includes a sealing disk 1, a first expansion sleeve 2 is arranged on the top of the sealing disk 1, a second expansion sleeve 3 is arranged on the top of the first expansion sleeve 2, a limiting sleeve 4 is arranged on the top of the second expansion sleeve 3, a connecting sleeve 10 is fixedly installed inside the sealing disk 1, a through hole 11 is opened at the bottom of the connecting sleeve 10, and a nut 12 is threadedly connected to the outside of the through hole 11.

[0020] In specific implementation, by setting up a sealing disk 1, when in use, the surgical operator uses a bone awl to open a locking hole on the side of the patient's bone, the size of which is compatible with the sealing disk 1, and simultaneously passes the first expansion sleeve 2 and the second expansion sleeve 3 connected to the sealing disk 1 through the locking hole and inserts them into the interior of the bone. Through human operation, the top ends 8 of the two elastic intramedullary needle bodies 7 are extended to the topmost part of the inside of the bone, and when the elastic intramedullary needle body 7 extends toward the inside of the bone, the top end 8 of the elastic intramedullary needle body 7 will push the second expansion sleeve 3 and the first expansion sleeve 2 outward in turn, causing the cross notch 5 to gradually become larger, thereby enabling the elastic intramedullary needle body 7 to extend out of the interior of the expansion sleeve, and after the occupied area of ​​the first expansion sleeve 2 and the second expansion sleeve 3 becomes larger, the outside of the elastic intramedullary needle body 7 will be further continuously fixed, thereby achieving a firm pressurized fixation of the postoperative fracture surface, greatly reducing the instability caused by the movement of the elastic intramedullary needle body 7, and being more conducive to fracture healing.

[0021] And by setting a screw nut 12, the screw nut 12 is installed on the surface that fits the sealing disk 1. By setting the inner circle threaded ring 13 and the outer circle threaded ring 14, the screw nut 12 is threadedly installed in the interior of the connecting sleeve 10, thereby completing the locking of the end 9 of the elastic intramedullary needle body 7, and further eliminating the gap between the installation screw nut 12 and the locking hole of the elastic intramedullary needle body 7.

[0022] When implementing, follow these steps:

[0023] 1) First, a locking hole of a size matching the sealing disk 1 is opened on the side of the patient's bone using a bone awl;

[0024] 2) Then the first expansion sleeve 2 and the second expansion sleeve 3 connected to the sealing disc 1 are simultaneously inserted into the bone through the locking hole, and the top ends 8 of the two elastic intramedullary nail bodies 7 are extended to the top of the bone through human operation;

[0025] 3) When the elastic intramedullary needle body 7 extends toward the inside of the bone, the top end 8 of the elastic intramedullary needle body 7 will push the second expansion sleeve 3 and the first expansion sleeve 2 outward in turn, causing the cross notch 5 to gradually become larger, so that the elastic intramedullary needle body 7 can extend out of the expansion sleeve. After the occupied area of ​​the first expansion sleeve 2 and the second expansion sleeve 3 becomes larger, the outside of the elastic intramedullary needle body 7 will be further fixed continuously, so that the postoperative fracture surface can be firmly pressurized and fixed, greatly reducing the instability caused by the movement of the elastic intramedullary needle body 7;

[0026] 4) Finally, the screw nut 12 is threadedly installed in the interior of the connecting sleeve 10 to complete the locking of the end 9 of the elastic intramedullary nail body 7.

[0027] In summary, the elastic intramedullary nail device for eliminating the locking gap is provided with a sealing disk 1. When in use, the surgical operator uses a bone awl to open a locking hole on the side of the patient's bone, the size of which is compatible with the sealing disk 1, and simultaneously passes the first expansion sleeve 2 and the second expansion sleeve 3 connected to the sealing disk 1 through the locking hole and inserts them into the interior of the bone. Through human operation, the top ends 8 of the two elastic intramedullary nail bodies 7 are extended to the topmost part of the inside of the bone, and when the elastic intramedullary nail body 7 is extended toward the inside of the bone, the top end 8 of the elastic intramedullary nail body 7 will push the second expansion sleeve 3 and the first expansion sleeve 2 outward in turn, causing the cross notch 5 to gradually become larger, thereby achieving the elastic intramedullary nail body 7 being able to extend The first expansion sleeve 2 and the second expansion sleeve 3 come out of the interior of the expansion sleeve, and after the occupied area becomes larger, the outside of the elastic intramedullary needle body 7 will be further fixed continuously, so that the postoperative fracture surface can be firmly pressurized and fixed, which greatly reduces the instability caused by the movement of the elastic intramedullary needle body 7 and is more conducive to fracture healing; and by setting a screw nut 12, the screw nut 12 is installed at the surface that fits the sealing disk 1, and the inner circle threaded ring 13 and the outer circle threaded ring 14 are set, and the screw nut 12 is threadedly installed in the interior of the connecting sleeve 10, so as to complete the locking of the end 9 of the elastic intramedullary needle body 7, and further eliminate the gap between the installation screw nut 12 of the elastic intramedullary needle body 7 and the locking hole.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elastic intramedullary nail device for eliminating locking gap, comprising a sealing disk (1), characterized in that: A first expansion sleeve (2) is arranged on the top of the sealing disk (1), a second expansion sleeve (3) is arranged on the top of the first expansion sleeve (2), a limiting sleeve (4) is arranged on the top of the second expansion sleeve (3), a connecting sleeve (10) is fixedly installed inside the sealing disk (1), a through hole (11) is opened at the bottom of the connecting sleeve (10), and a screw nut (12) is threadedly connected to the outside of the through hole (11).

2. The elastic intramedullary nail device for eliminating locking gap according to claim 1, characterized in that: The number of the first expansion sleeve (2), the second expansion sleeve (3) and the limiting sleeve (4) is set to four groups, and cross-shaped notches (5) are formed between the four groups of limiting sleeves (4).

3. The elastic intramedullary nail device for eliminating locking gap according to claim 1, characterized in that: An annular through groove (6) is formed between the four groups of the first expansion sleeves (2) and the second expansion sleeves (3), and an elastic intramedullary needle body (7) is arranged inside the first expansion sleeves (2) and the second expansion sleeves (3).

4. The elastic intramedullary nail device for eliminating locking gap according to claim 3, characterized in that: The size of the annular through groove (6) is matched with the size of the elastic intramedullary needle body (7), the top of the elastic intramedullary needle body (7) is the top end (8), and the bottom of the elastic intramedullary needle body (7) is the end end (9).

5. The elastic intramedullary nail device for eliminating locking gap according to claim 1, characterized in that: The bottom of the screw nut (12) is provided with an inner threaded ring (13) and an outer threaded ring (14), the inner threaded ring (13) is threadedly connected to the inner wall of the through hole (11), and the outer threaded ring (14) is threadedly connected to the outer wall of the through hole (11), and the screw nut (12) is flush with the level of the sealing disk (1).

6. The elastic intramedullary nail device for eliminating locking gap according to claim 4, characterized in that: The four groups of limiting sleeves (4) all abut against the outer wall of the elastic intramedullary needle body (7), and the sealing disk (1) is made of silica gel material.

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