TWM607289U - Intramedullary nail fixing device for femoral neck fracture - Google Patents

Abstract

This creation is an intramedullary nail fixation device for femoral neck fractures, which includes a first internal thread, a second internal thread and a longitudinal perforation set inside the intramedullary nail, and a fixing bolt stopper with a first external thread , An end cover provided with a second external thread, a femoral head fixing bolt obliquely penetrating the perforation of the intramedullary nail, and a femoral body fixation screw penetrating the perforation of the intramedullary nail transversely. The first internal thread and the first external thread are screwed correspondingly. The second internal thread and the second external thread are screwed correspondingly. The inner end of the fixing bolt limiting member is provided with a limiting convex portion penetrating the longitudinal through hole and protruding from the upper hole. The outer wall of one end of the femoral head fixing bolt is equidistantly provided with at least one limiting groove, and the limiting groove provides the outer end of the limiting convex portion to be correspondingly embedded, so that the fixing bolt limiting member and the intramedullary nail are obliquely connected and positioned.

Description

Intramedullary nail fixing device for femoral neck fracture

This creation is related to an intramedullary nail fixation device for femoral neck fractures, especially a structural innovation that improves the positioning stability of the femoral head fixation bolt and the intramedullary nail. It uses the limiting protrusion of the fixing bolt limiter , Correspondingly embedded in one of the limiting grooves on the outer wall of the femoral head fixing bolt to prevent improper rotation of the femoral head fixing bolt.

The modernization of life has improved, the life span of human beings has been extended, and the incidence of many diseases has increased day by day. With age, osteoporosis occurs quietly. The femoral neck of the human body becomes very fragile due to the decrease in bone density and quality. Femoral neck fractures are prone to occur. Especially with the aging population, femoral neck fractures have become a serious social problem.

The femur is the largest long tubular bone in the human body, and its upper end is inwardly enlarged and spherical and is the femoral head. The thinner part of the outer and lower part of the femoral head is called the femoral neck. The femoral neck is the gravity support system at the upper end of the femur. The force and weight are transmitted to the lower limbs through the femoral neck. When the patient’s femoral neck is fractured, it is not suitable for medical treatment to use plaster fixation. Intramedullary nails are usually used to penetrate the femoral body, and the femoral head fixing bolts are used to pull the femoral head obliquely to connect the femoral head and the femoral body firmly. , So that the femoral neck fracture can be tightly closed.

Approved Announcement No. 104118205 "A fixation system for femoral fractures" invention patent (Certificate No.: I589263), which consists of an intramedullary nail, a bone fixation element and a connecting element Among them, the intramedullary nail includes: an upper part, a lower part, a hollow tube, and an oblique channel. The above-mentioned bone fixation element can penetrate the above-mentioned oblique channel, and it further includes a front part and a rear part, wherein the front part and the rear part are integrally formed. The above-mentioned connecting element is arranged in the upper part of the intramedullary nail, which itself includes a locking unit and a fixing unit, wherein the above-mentioned locking unit can be fitted on the fixing unit and push the fixing unit to make the fixing unit Join the back of the bone fixation element.

The previous cases of the fixation system for femoral fractures mentioned above still have the following shortcomings in actual use, which need to be improved by the relevant industry:

1. In the previous case, the first tooth-shaped groove of the bone fixation element and the second tooth-shaped groove of the fixing unit are prone to inaccuracies in the first and second tooth-shaped grooves, resulting in improper rotation of the bone fixation element. When the bone fixation element rotates improperly, the stability of the connection between the intramedullary nail and the bone fixation element will be poor, which will greatly affect the fracture treatment effect.

2. The second tooth-shaped groove of the previous fixing unit is obliquely arranged on the annular surface of the lower end of the fixed unit, which not only has a high production cost, but also causes the first and second tooth-shaped grooves to not meet expectations. , Is the biggest problem that the previous case does not meet the industrial utilization.

The main purpose of this creation of the intramedullary nail fixation device for femoral neck fractures is: to improve the stability of the connection and positioning of the femoral head fixation bolt and the intramedullary nail, which is correspondingly embedded in the femoral head by the limit protrusion of the fixation bolt limiter One of the limiting grooves of the fixing bolt can prevent improper rotation of the fixing bolt of the femoral head.

This creation provides an intramedullary nail fixation device for femoral neck fractures, which includes a first internal thread arranged inside the upper end of the intramedullary nail, a second internal thread arranged on the outer end of the first internal thread, and a Longitudinal perforation inside the intramedullary nail, a fixed screw with a first external thread A bolt stopper, an end cover provided with a second external thread, a femoral head fixing bolt obliquely penetrating through the perforation of the intramedullary nail, and a femoral body fixation screw penetrating the underperforation of the intramedullary nail transversely. The first internal thread is screwed correspondingly with the first external thread of the fixing bolt limiter. The second internal thread is screwed correspondingly with the second external thread of the end cover. The inner end of the fixing bolt limiting member is provided with a limiting protrusion penetrating the longitudinal perforation and protruding from the upper perforation; the outer wall of one end of the femoral head fixing bolt is provided with at least one limiting groove at equal intervals, and the limiting groove provides The outer end of the limiting protrusion is correspondingly embedded, so that the fixing bolt limiting member and the intramedullary nail are connected and positioned obliquely.

The inner end of the end cover includes an extension part correspondingly embedded in the outer end of the fixing bolt limiting member.

The outer diameter of the other end of the femoral head fixing bolt is provided with a third external thread, and the pitch of the third external thread 162 includes at least one bone penetration hole.

The outer diameter of the other end of the femoral head fixing bolt is equidistantly arranged with several spiral blades.

At least one bone penetration hole is provided between the adjacent spiral blades.

The intramedullary nail fixation device for femoral neck fractures provided by this creation is embedded in one of the limit grooves of the femoral head fixation bolt by the limit protrusion of the fixation bolt limiter to prevent improper femoral head fixation bolts The effect of rotation improves the stability of the connection and positioning of the femoral head fixing bolt and the intramedullary nail.

1: Intramedullary nail fixation device

10: Intramedullary nail

101: upper piercing

102: lower perforation

11: The first internal thread

12: The second internal thread

13: Longitudinal perforation

14: Fixed bolt limiter

141: The first external thread

142: Limit convex

15: End cover

151: second external thread

152: Extension

16: Femoral head fixing bolt

160: Bone penetration hole

161: Limit Slot

162: third external thread

163: Spiral Blade

164: Bone Infiltration Hole

17: Femoral body fixation screw

2: Femoral body

21: Femoral head

22: Femoral neck fracture

Figure 1 is an exploded view of the components of the intramedullary nail fixation device of this creation.

Figure 2 is a sectional view of the component assembly of the intramedullary nail fixation device of the present creation.

Figure 3 is a schematic diagram of the creation of the intramedullary nail fixation device used in the femoral neck fracture.

Figure 4 is a perspective view of the appearance of the third external thread of the fixing bolt limiter of this creation with bone penetration holes.

Figure 5 is a three-dimensional view of the appearance of the fixed bolt limiter of this creation with a spiral blade.

Figure 6 is a three-dimensional view of the appearance of the fixing bolt limiter of this creation with a spiral blade and bone penetration holes.

The features and technical content of the related patent applications related to this creation will be clearly presented in the following detailed descriptions of the preferred embodiments with reference to the drawings.

Please refer to Figures 1 and 2. This creation provides an intramedullary nail fixation device 1 for femoral neck fractures, which includes a first internal thread 11 arranged inside the upper end of the intramedullary nail 10, and a first internal thread 11 arranged on the first A second internal thread 12 at the outer end of the internal thread 11, a longitudinal perforation 13 provided inside the intramedullary nail 10, a fixing bolt stopper 14 provided with a first external thread 141, and an end provided with a second external thread 151 The part cover 15, a femoral head fixing bolt 16 obliquely penetrating the upper through hole 101 of the intramedullary nail 10, and a femoral body fixing screw 17 transversely penetrating the lower hole 102 of the intramedullary nail 10.

Please refer to FIG. 2, the first internal thread 11 inside the intramedullary nail 10 is screwed correspondingly with the first external thread 141 of the fixing bolt limiter 14. The second internal thread 12 inside the intramedullary nail 10 is screwed correspondingly with the second external thread 151 of the end cover 15. The inner end of the fixing bolt limiting member 14 is provided with a limiting protrusion 142 that penetrates the longitudinal through hole 13 and protrudes from the upper through hole 101. At least one limiting groove 161 is provided on the outer wall of one end of the femoral head fixing bolt 16 at equal intervals. The limiting groove 161 provides the outer end of the limiting protrusion 142 correspondingly embedded, so that the fixing bolt limiting member 14 and the intramedullary nail 10 Oblique link positioning.

Please refer to Figures 1 and 2, the inner end of the end cover 15 includes an extension 152 correspondingly embedded in the outer end of the fixing bolt stopper 14, and the other end of the femoral head fixing bolt 16 The outer diameter is provided with a third external thread 162 (refer to Figure 1). The teeth of the third external thread 162 There is at least one bone penetration hole 160 between the talus (please refer to Figure 4). The bone penetration hole 160 can improve the bone formation and penetration effect of the patient. The outer diameter of the other end of the femoral head fixing bolt 16 is equidistantly arranged with several spiral blades 163 (please refer to Fig. 5). There is at least one bone penetration hole 164 between the adjacent spiral blades 163 (please refer to FIG. 6). The bone penetration hole 164 can improve the bone formation and penetration effect of the patient.

When using this creation [please refer to Figure 3], first insert the intramedullary nail 10 into the patient's femoral body 2, and combine the femoral head fixing bolt 16 to screw the femoral head 21 obliquely, and then the femoral head 21 with the femoral neck fractured The buckle is pressed against the femoral body 2. When the femoral head 21 and the femoral body 2 are firmly connected, the fractured part 22 of the femoral neck can be tightly closed. Wherein, the limiting protrusion 142 of the fixing bolt limiting member 14 is correspondingly embedded in one of the limiting grooves 161 of the femoral head fixing bolt 16 to prevent the femoral head fixing bolt 16 from rotating, thereby stabilizing the femoral head fixing bolt 16 is connected to the intramedullary nail 10 for the purpose of positioning. For patients with femoral neck fractures using the intramedullary nail fixation device 1 of this invention, during the recovery period after the treatment of bone femoral neck fractures, the bone penetration holes 160 and 164 of the femoral head fixing bolt 16 can be set to improve the bone formation and penetration effect of the patient. Furthermore, the firmness of the intramedullary nail fixation device group 1 in the femoral body and the femoral neck is increased.

From the description of the above embodiments, it can be known that the intramedullary nail fixation device for femoral neck fractures of this invention has the following advantages:

1. It has the advantage that the femoral head fixing bolt 16 and the intramedullary nail 10 are firmly connected and positioned: this creation uses the limiting protrusion 142 of the fixing bolt limiting member 14 to correspond to one of the limits embedded in the femoral head fixing bolt 16 In the slot 161, the effect of preventing the rotation of the femoral head fixing bolt 16 is achieved, which improves the problems of the femoral fixation element that has been disclosed, which is prone to improper rotation and unstable connection with the intramedullary nail.

2. It has the advantage of greatly reducing the production and manufacturing costs of related components: the processing of the limiting protrusions 142 of the fixing bolt limiting piece 14 and the limiting grooves 161 of the femoral head fixing bolt 16 of this invention not only shortens the assembly time, but also has the positioning effect. The improvement is true, its production and manufacturing costs are greatly reduced, and it is progressive. It is an innovation in the intramedullary nail fixing device 1 that is beneficial to patients with femoral neck fractures.

In summary, the technical features and methods of the intramedullary nail fixation device used for femoral neck fractures in this creation have novelty that the products in the same category have not thought about. This creation effectively improves the problem that the femoral fixation element that has been published before is prone to improper rotation and unstable connection with the intramedullary nail. Its structural features and innovation of technical means do meet the patent requirements of novelty, advancement and industrial applicability. .

However, the above are only the preferred embodiments of this creation, and should not be used to limit the scope of implementation of this creation, that is, simple equivalent changes and modifications made according to the scope of patent application and new description of this creation, All are still within the scope of this creation patent.

1: Intramedullary nail fixation device

10: Intramedullary nail

101: upper piercing

102: lower perforation

12: The second internal thread

13: Longitudinal perforation

14: Fixed bolt limiter

141: The first external thread

142: Limit convex

15: End cover

151: second external thread

152: Extension

16: Femoral head fixing bolt

161: Limit Slot

162: third external thread

17: Femoral body fixation screw

Claims (5)

An intramedullary nail fixing device for femoral neck fractures, comprising a first internal thread arranged inside the upper end of the intramedullary nail, a second internal thread arranged on the outer end of the first internal thread, and a second internal thread arranged on the intramedullary nail The internal longitudinal perforation, a fixing bolt stopper with a first external thread, an end cover with a second external thread, a femoral head fixing bolt obliquely penetrating the perforation on the intramedullary nail, and a lateral The femoral body fixation screw that penetrates the perforation under the intramedullary nail; Its characteristics are: The first internal thread is screwed correspondingly with the first external thread of the fixing bolt limiter; the second internal thread is screwed correspondingly with the second external thread of the end cover; the inner end of the fixing bolt limiter , A limiting protrusion that penetrates into the longitudinal perforation and protrudes from the upper perforation is provided; an outer wall of one end of the femoral head fixing bolt is equidistantly provided with at least one limiting groove, and the limiting groove provides the outer end of the limiting protrusion Correspondingly embed, so that the fixing bolt limiter and the intramedullary nail are connected and positioned. The intramedullary nail fixation device for femoral neck fractures as described in item 1 of the scope of patent application, wherein the inner end of the end cover includes an extension part correspondingly embedded in the outer end of the fixing bolt limiter . The intramedullary nail fixation device for femoral neck fractures described in item 1 of the scope of patent application, wherein the outer diameter of the other end of the femoral head fixation bolt is provided with a third external thread, and the pitch of the third external thread includes At least one bone penetrates the hole. The intramedullary nail fixation device for femoral neck fractures described in the first item of the scope of patent application, wherein the outer diameter of the other end of the femoral head fixation bolt is equidistantly arranged with several spiral blades. The intramedullary nail fixation device for femoral neck fractures described in item 4 of the scope of patent application, wherein at least one bone penetration hole is provided between the adjacent spiral blades.

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