CN205251663U - Excellent fixing system of ring nail before special percutaneous wicresoft of pelvis - Google Patents

Abstract

The utility model provides a special percutaneous minimally invasive anterior ring screw fixation system for the pelvis, which includes the first iliac screw, the thoracic screw, the second iliac screw and an arc-shaped connecting rod, the first iliac screw, the thoracic screw and the second The two iliac screws are sequentially arranged on the arc-shaped connecting rod, and the first iliac screw, the thoracic screw and the second iliac screw are respectively detachably and fixedly connected to the arc-shaped connecting rod. Preferably, the diameters of the first iliac screw and the second iliac screw are larger than the diameter of the thoracic screw. The curved connecting rod is a metal connecting rod. The first iliac screw, the thoracic screw and the second iliac screw are pedicle screws, including screw heads, and arc-shaped connecting rods are sequentially penetrated and detachably fixed in the three screw heads. The special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis of the utility model can obtain good reset and fixation, is convenient for treating pelvic fractures quickly and easily, and has small surgical trauma and less bleeding, which reduces surgical risks. Simple, easy to use, suitable for large-scale promotion and application.

Description

Percutaneous minimally invasive anterior ring nail rod fixation system for pelvis

technical field

The utility model relates to the field of medical equipment, in particular to the technical field of pelvic fixation systems, in particular to a special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis.

Background technique

Pelvic fracture is one of the most serious types of trauma in orthopedics. It is common in traffic injuries and high-fall injuries. Its mortality rate is even as high as 50%, and its post-injury disability rate is extremely high. Its clinical treatment is very complicated and difficult.

The traditional treatment methods for pelvic fractures mainly include two types: one is minimally invasive treatment based on external pelvic support, and the other is open reduction and internal fixation with pelvic plates and screws. Pelvic external stent treatment has the characteristics of fast and simple treatment. However, there are disadvantages such as limited fixation strength, nail tract infection, inconvenient nursing, and affecting life. Although plate and screw therapy can achieve good reduction and fixation, the surgical trauma is huge and the amount of bleeding is large, which undoubtedly increases the risk of surgery and increases the risk of surgery.

Therefore, it is desired to provide a pelvic fixation system that can not only combine the advantages of the above two surgical methods, but also reduce their respective disadvantages.

The pedicle screw is a medical device that is widely used in spinal correction operations such as the spine, cervical spine, and lumbar spine. Each screw is connected, and the fixed connecting rod applies the principle of leverage, and uses the three-dimensional space technique of traction, torsion, and reset to correct the ectopic spine and joints, in order to restore the normal diameter of the intervertebral foramen, and achieve the purpose of correction or fixation .

At present, the structural forms of pedicle screws used in the market are generally divided into two types: one is a fixed shaft structure, and the other is a cardan shaft structure. Wherein, the fixed shaft structure mainly includes a top screw and a screw body. The screw body includes a screw head and a screw thread portion fixed to each other. The top of the screw head is provided with a threaded hole, and a top screw is arranged in the threaded hole. The top screw and the threaded hole Threaded connection, the side of the screw head is provided with a through groove or a through hole for the fixed connecting rod to pass through, the threaded hole communicates with the through groove or the through hole, and the top screw is used for fixing the fixed connecting rod. Before use, the doctor must carefully consider the movement of the screw assembly on each spine, so it must be drilled or screwed into the spine at a special angle to ensure that the screw is positioned accurately, and then the fixing rod is used to penetrate it. In the cardan shaft structure, the screw head and the screw thread are rotatably connected when the fixed link is not connected, and are fixedly connected when the fixed link is connected, which increases the freedom of the screw head and does not require precise positioning The fixed link can be connected.

Therefore, it is hoped that pedicle screws can be used to provide a pelvic fixation system that can not only combine the advantages of the above two surgical methods, but also reduce their respective disadvantages.

Utility model content

In order to overcome the above-mentioned shortcomings in the prior art, an object of this utility model is to provide a special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis, which can obtain good reduction and fixation, and is convenient for treating pelvic fractures quickly and easily. In addition, the surgical trauma is small, the blood loss is small, the surgical risk is reduced, and it is suitable for large-scale popularization and application.

Another purpose of the utility model is to provide a special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis, which is ingenious in design, simple in structure, easy to use, and suitable for large-scale popularization and application.

Another object of the present invention is to provide a special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis, which adopts pedicle screws, has ingenious design, simple structure, and is easy to use, which is suitable for large-scale popularization and application.

In order to achieve the above purpose, the utility model provides a special percutaneous minimally invasive anterior ring screw fixation system for the pelvis, which is characterized in that it includes the first iliac screw, the thoracic screw, the second iliac screw and an arc-shaped connecting rod. The first iliac screw, the thoracic screw and the second iliac screw are sequentially set on the arc-shaped connecting rod, and the first iliac screw, the thoracic screw and the second iliac screw The nails are respectively detachably and fixedly connected to the arc-shaped connecting rods.

Preferably, the diameters of the first iliac screw and the second iliac screw are larger than the diameter of the thoracic screw.

Preferably, the arc-shaped connecting rod is a metal connecting rod.

More preferably, the metal connecting rod is a titanium connecting rod.

Preferably, the first iliac screw, the thoracic screw and the second iliac screw are pedicle screws, the pedicle screws include screw heads, and the arc-shaped connecting rods are sequentially passed through And detachably fixed in the head of three said screws.

More preferably, the pedicle screw also includes a screw thread portion, the screw thread portion is connected to the bottom of the screw head, the top of the screw head is provided with a threaded hole, and the surface of the top is along the The radial direction of the threaded hole is set in a direction away from the threaded hole and toward a direction close to the threaded part of the screw.

More preferably, the corners of the head of the screw adopt a rounded structure.

More preferably, the side of the screw head is provided with a through groove, and the through groove is a U-shaped through groove.

More preferably, the pedicle screw further includes a screw, the top of the screw head is provided with a threaded hole, the screw is threadedly engaged in the screw hole, and the top of the screw has a polygonal recess.

Furthermore, the polygonal recess is a regular hexagonal recess.

The beneficial effects of the utility model mainly lie in:

1. The special percutaneous minimally invasive anterior ring screw fixation system for the pelvis of the present invention includes the first iliac screw, the thoracic screw, the second iliac screw and an arc-shaped connecting rod, the first iliac screw, the thoracic screw and the second The iliac screws are set on the arc-shaped connecting rod in turn, and the first iliac screw, thoracic screw and the second iliac screw are respectively detachably and fixedly connected with the arc-shaped connecting rod, which can obtain good reduction and fixation, and is convenient for quick and easy For the treatment of pelvic fractures, the surgical trauma is small, the blood loss is small, the surgical risk is reduced, and it is suitable for large-scale popularization and application.

2. The special percutaneous minimally invasive anterior ring screw fixation system for the pelvis of the present invention includes the first iliac screw, the thoracic screw, the second iliac screw and an arc-shaped connecting rod, the first iliac screw, the thoracic screw and the second The iliac screws are set on the arc-shaped connecting rod in turn, and the first iliac screw, thoracic screw and the second iliac screw are detachably fixedly connected with the arc-shaped connecting rod respectively. The design is ingenious, the structure is simple, and the use is convenient. Scale application.

3. The first iliac screw, the thoracic vertebral screw and the second iliac screw of the special percutaneous minimally invasive anterior ring screw fixation system for the pelvis of this utility model are pedicle screws, which are ingeniously designed, simple in structure, easy to use, and suitable for Large-scale promotion and application.

These and other purposes, features and advantages of the present utility model are fully embodied through the following detailed description, drawings and claims, and can be realized through means, devices and their combinations specifically pointed out in the appended claims.

Description of drawings

Fig. 1 is a schematic perspective view of a specific embodiment of the present invention.

FIG. 2 is an enlarged schematic view of area A of the specific embodiment shown in FIG. 1 .

Fig. 3 is a schematic perspective view of the pedicle screw of the specific embodiment shown in Fig. 1 .

Fig. 4 is a schematic front view of the pedicle screw shown in Fig. 3 .

Fig. 5 is a schematic side view of the pedicle screw shown in Fig. 3 .

FIG. 6 is a schematic top view of the pedicle screw shown in FIG. 3 .

(Symbol Description)

1 the first iliac screw; 2 the thoracic spine screw; 3 the second iliac screw; 4 arc-shaped connecting rod; 5 screw head; 51 threaded hole; 52 surface; Apical wire; 71 polygonal concave; 8 left anterior inferior iliac spine; 9 right anterior inferior iliac spine; 10 pubic branch.

detailed description

In order to understand the technical content of the present utility model more clearly, the following examples are given in detail.

Please refer to Fig. 1 to Fig. 6, in a specific embodiment of the present invention, the special percutaneous minimally invasive anterior ring screw fixation system for the pelvis of the present invention includes the first iliac nail 1, the thoracic vertebra nail 2, the first Two ilium nails 3 and arc-shaped connecting rods 4, the first iliac nails 1, the thoracic vertebra nails 2 and the second iliac nails 3 are sequentially arranged on the arc-shaped connecting rods 4, and the The first iliac screw 1 , the thoracic screw 2 and the second iliac screw 3 are respectively detachably and fixedly connected to the arc-shaped connecting rod 4 .

The diameters of the first iliac screw 1, the thoracic spine screw 2 and the second iliac screw 3 can be determined according to needs, please refer to Fig. 1 to Fig. 6, in a specific embodiment of the present invention , the diameters of the first iliac screw 1 and the second iliac screw 3 are larger than the diameter of the thoracic screw 2 .

The lengths of the first iliac screw 1, the thoracic spine screw 2 and the second iliac screw 3 can be determined according to needs, please refer to Figures 1 to 6, in a specific embodiment of the present invention , the length of the first iliac screw 1 and the second iliac screw 3 is greater than the length of the thoracic screw 2 .

The arc-shaped connecting rod 4 can be any suitable arc-shaped connecting rod. Please refer to FIG. 1 to FIG. 6 . In a specific embodiment of the present invention, the arc-shaped connecting rod 4 is a metal connecting rod.

The metal connecting rod may be any suitable metal connecting rod. Please refer to FIGS. 1-6 . In a specific embodiment of the present invention, the metal connecting rod is a titanium connecting rod.

The first iliac screw 1, the thoracic screw 2 and the second iliac screw 3 can be any suitable nails, please refer to Figures 1 to 6, in a specific embodiment of the present invention , the first iliac screw 1, the thoracic screw 2 and the second iliac screw 3 are pedicle screws, the pedicle screws include a screw head 5, and the arc-shaped connecting rod 4 is sequentially It is pierced and detachably fixed in the three screw heads 5 .

In order to reduce skin irritation, please refer to Figures 1 to 6, in a specific embodiment of the present utility model, the pedicle screw further includes a screw thread portion 6, and the screw thread portion 6 is connected to the The bottom of the screw head 5, the top of the screw head 5 is provided with a threaded hole 51, and the surface 52 of the top is oriented away from the threaded hole 51 along the radial direction of the threaded hole 51 and towards the direction close to the threaded hole 51. The direction of the screw thread portion 6 is inclined. This is the so-called "low cut-off" design. The so-called low-cut edge means that the original top surface is straight, and when the nail is driven in at an angle, the straight edge will irritate the skin, and the improved design is changed to two slopes, which will not push to the skin.

In order to reduce irritation to the skin, please refer to FIGS. 1 to 6 . In a specific embodiment of the present invention, the corners of the screw head 5 adopt a rounded structure. That is, not only the top surface 52 adopts a low-cut design, but also the corners adopt a rounded structure to reduce skin irritation.

In order to facilitate the penetration of the arc-shaped connecting rod 4, please refer to FIGS. 53 is a U-shaped through groove. Of course, it can also be set as a through hole.

In order to fix the arc-shaped connecting rod 4 after the arc-shaped connecting rod 4 penetrates, please refer to Figs. The top screw 7 is threadedly engaged in the threaded hole 51 , and the top of the top screw 7 has a polygonal recess 71 . The threaded hole 51 is connected with the through groove 53. After the arc connecting rod 4 passes through the through groove 53, the top screw 7 is tightened, and the top screw 7 leans against the arc connecting rod 4 from the side to fix the arc connecting rod 4 in the through The bottom of the groove 53. The polygonal concave portion 71 on the top of the jacking wire 7 is designed for tightening the jacking wire 7 . Of course, common structures can also be designed, such as inline grooves, cross-shaped grooves or quincunx grooves instead of the polygonal concave portion 71 .

The polygonal concave portion 71 may be any suitable polygonal concave portion. Please refer to FIG. 1 to FIG. 6 . In a specific embodiment of the present invention, the polygonal concave portion 71 is a regular hexagonal concave portion.

When the utility model is used, as shown in Figure 1, the first iliac nail 1 and the second iliac nail 3 are inserted into the left and right anterior inferior iliac spines 8, 9, the thoracic spine nail 2 is inserted into the pubic branch 10, the first The iliac screw 1, the thoracic screw 2 and the second iliac screw 3 are connected by an arc-shaped connecting rod 4, and after a biomechanical finite element test, its rigidity is equivalent to that of traditional plate fixation.

The present inventor has summed up the pelvic percutaneous minimally invasive anterior ring nail rod fixation system for the treatment of pelvic fractures in clinical practice. This system innovatively adopts the anterior pelvic ring fixation with 3 screws (namely, the first iliac screw 1, the thoracic screw 2 and the second iliac screw 3), and the screws on both sides are placed into the left and right anterior inferior iliac spines 8 and 9. , the nail in the middle is inserted into the pubic ramus 10, and the 3 nails are connected by an arc-shaped connecting rod 4 . And according to clinical needs, the shape of the original pedicle screw was improved, mainly by changing the sharp edge of the screw head of the pedicle screw, and a low-cutting design was carried out to make it more in line with the clinical needs of pelvic fractures.

In summary, the special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis of the present invention can achieve good reduction and fixation, which is convenient for the treatment of pelvic fractures quickly and easily, and has less surgical trauma and less bleeding, which reduces the risk of surgery , ingenious design, simple structure, easy to use, suitable for large-scale popularization and application.

Those skilled in the art should understand that the above description and the embodiments of the present invention shown in the accompanying drawings are only examples and do not limit the present invention.

This shows that the purpose of the utility model has been completely and effectively realized. The functions and structural principles of the utility model have been shown and explained in the embodiments, and the implementation can be modified arbitrarily without departing from the principles. Therefore, the present invention includes all modified embodiments based on the spirit and scope of the claims.

Claims (10)

1. A special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis, characterized in that it comprises a first iliac nail, a thoracic spine nail, a second iliac nail and an arc-shaped connecting rod, the first iliac nail, The thoracic screw and the second iliac screw are sequentially arranged on the arc-shaped connecting rod, and the first iliac screw, the thoracic screw and the second iliac screw are connected with the arc-shaped connecting rod respectively. The connecting rod is detachably fixedly connected. 2. The special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis according to claim 1, wherein the diameters of the first iliac nail and the second iliac nail are greater than the diameter of the thoracic spine nail . 3. The special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis according to claim 1, wherein the arc-shaped connecting rod is a metal connecting rod. 4. The special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis according to claim 3, wherein the metal connecting rod is a titanium metal connecting rod. 5. The special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis according to claim 1, wherein the first iliac screw, the thoracic screw and the second iliac screw are pedicles The pedicle screw includes screw heads, and the arc-shaped connecting rods are sequentially passed through and detachably fixed in the three screw heads. 6. The special percutaneous minimally invasive anterior ring screw fixation system for the pelvis according to claim 5, wherein the pedicle screw also includes a screw thread portion, and the screw thread portion is connected to the screw head The top of the screw head is provided with a threaded hole, and the surface of the top is inclined along the radial direction of the threaded hole toward a direction away from the threaded hole and toward a direction close to the screw thread portion. 7. The special percutaneous minimally invasive anterior ring screw fixation system for the pelvis according to claim 5, wherein the corners of the screw heads adopt a rounded structure. 8. The special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis according to claim 5, wherein a through groove is provided on the side of the screw head, and the through groove is a U-shaped through groove. 9. The special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis as claimed in claim 5, wherein the pedicle screw also includes a top screw, and the top of the screw head is provided with a threaded hole, so The top screw is threadedly engaged in the threaded hole, and the top of the top screw has a polygonal recess. 10 . The special percutaneous minimally invasive anterior ring nail rod fixation system for the pelvis according to claim 9 , wherein the polygonal concave portion is a regular hexagonal concave portion. 11 .