CN103070722B - ilium fixing device - Google Patents

Abstract

The invention relates to an ilium fixation device, comprising a connecting rod, characterized in that there are a first U-shaped groove and a second U-shaped groove, which are symmetrically arranged on both ends of the connecting rod through a ball-and-socket joint at both ends of the connecting rod. At the end, the first wing steel plate arranged on the first U-shaped groove and the second wing steel plate arranged on the second U-shaped groove are fixed by fixing nuts. It is characterized in that a small through hole is opened at the U-shaped top of the first U-shaped groove and the second U-shaped groove, the connecting rod passes through the small hole, and the ball-and-socket joint is located inside the U-shaped top of the U-shaped groove. One wing steel plate and the second wing steel plate are respectively provided with a fixing rod, and the fixing rods are respectively inserted into the first U-shaped groove and the second U-shaped groove, and the fixing rod is located in the middle part of the U-shaped groove, between the first U-shaped groove and the second U-shaped groove. The U-shaped opening of the U-shaped groove is provided with an internal thread. The positive and progressive effects of the present invention are: the ilium fixation device is simple in structure, safe to use, easy to place percutaneously, easy to expose the incision, and convenient to place.

Description

Iliac fixation device

technical field

The invention relates to a medical device, in particular to an ilium fixation device suitable for percutaneous internal fixation of iliac plate screws.

Background technique

With the development of medical technology, all kinds of medical auxiliary equipment have emerged as the times require. In surgery, fixation devices are often required to fix bones. The morbidity and mortality of unstable pelvic fractures are high. To address this medical problem, various internal fixation devices have been developed accordingly.

In the prior art, internal fixation devices have a good fixation effect on fractures of the anterior pelvic ring, but the effect is not ideal for fractures of the posterior pelvic ring with vertical and rotational instability. Studies have shown that for unstable pelvic fractures caused by the posterior ring, the fixation of the posterior structure is very important. Biomechanical studies have shown that the posterior plate fixation can obtain sufficient stability of the posterior pelvic ring. The existing posterior plate system has disadvantages such as large trauma, difficult placement, and difficulty in plasticity. When performing percutaneous minimally invasive surgery with the traditional two-wing fixed posterior pelvic plate, the plate needs to be turned over first, and the plate is inserted through the subcutaneous channel through the incision on one side. Covering the bone surface, due to the fixed angle of the two wings, it is extremely difficult to place this kind of plate, and the operation is cumbersome, and the plate is not easy to adhere to the bone surface.

Those skilled in the art urgently need to develop an ilium fixation device that is easy to operate, easy to expose the incision, and easy to place to solve the above problems.

Contents of the invention

The technical problem to be solved by the present invention is to provide a new type of ilium fixation device in order to overcome the shortcomings of the prior art, such as poor posterior fixation effect, large trauma, difficult placement, and difficult plasticity.

The present invention solves the above technical problems through the following technical solutions:

An ilium fixation device, comprising a connecting rod, is characterized in that:

There are a first U-shaped groove and a second U-shaped groove, which are symmetrically arranged at both ends of the connecting rod through a ball-and-socket joint at both ends of the connecting rod, and the first wing steel plate arranged on the first U-shaped groove and the The second wing steel plate on the second U-shaped groove is fixed by a fixing nut.

It is characterized in that a small through hole is opened at the U-shaped top of the first U-shaped groove and the second U-shaped groove, the connecting rod passes through the small hole, and the ball-and-socket joint is located inside the U-shaped top of the U-shaped groove. One wing steel plate and the second wing steel plate are respectively provided with a fixing rod, and the fixing rods are respectively inserted into the first U-shaped groove and the second U-shaped groove, and the fixing rod is located in the middle part of the U-shaped groove, between the first U-shaped groove and the second U-shaped groove. The U-shaped opening of the U-shaped groove is provided with an internal thread, and the fixing nut is screwed with the internal thread provided at the U-shaped opening of the first U-shaped groove and the second U-shaped groove.

It is characterized in that the first wing steel plate and the second wing steel plate are arranged at right angles to the fixing bar.

It is characterized in that the fixed nut is against the fixed rod, and a positioning block is placed between the fixed rod and the ball-and-socket joint.

It is characterized in that the first wing plate and the second wing plate are provided with a plurality of plate holes, and sacroiliac screws are fixedly connected in the plate holes.

It is characterized in that there are 2 to 4 steel plate holes on the first wing steel plate and the second wing steel plate respectively.

It is characterized in that the diameter of the fixing rod is 5.5mm, and the groove width of the first U-shaped groove and the second U-shaped groove is 6.5mm.

The positive and progressive effects of the present invention are: the ilium fixation device is simple in structure, safe to use, convenient for percutaneous placement, easy to expose the incision, and convenient to place.

Description of drawings

Fig. 1 is a schematic structural view of the ilium fixation device of the present invention.

Fig. 2 is the three-dimensional schematic view of the connecting rod and the U-shaped groove of the ilium fixation device of the present invention,

Fig. 3 is a three-dimensional schematic diagram of a fixing nut of the iliac bone fixing device of the present invention.

Fig. 4 is a schematic diagram of the installation of the fixing rod, the positioning block, the ball-and-socket joint and the fixing nut in the U-shaped groove of the iliac bone fixing device of the present invention.

Fig. 5 is a schematic diagram of an ilium fixation device fixed on the ilium according to a specific embodiment of the present invention.

Fig. 6 is a schematic diagram of another angle of the ilium fixation device fixed on the ilium according to a specific embodiment of the present invention.

Figure 7 is a schematic diagram of the surgical incision.

Figure 8 shows that when using a traditional internal fixation device with two wings that cannot be disassembled, it is very difficult to install because the two wings are fixed, and the steel plate needs to be turned over before inserting the steel plate through the subcutaneous channel through the incision on one side.

Fig. 9 is a schematic diagram of flipping the steel plate into the incision when using a traditional internal fixation instrument with two wings that cannot be disassembled.

Figure 10 shows that when using a traditional internal fixation device with two wings that cannot be disassembled, the internal fixation needs to be reversed and inserted into the incision according to Figures 7 and 8, and finally the internal fixation can be turned over in the incision so that the steel plate can be attached to the bone surface. The angle is fixed, and it is difficult to fit well with the bone surface.

detailed description

A kind of ilium fixation device 1 among the figure, comprises connecting rod 4, is characterized in that:

There are a first U-shaped groove 5 and a second U-shaped groove 6, which are symmetrically arranged at both ends of the connecting rod through a ball-and-socket joint 7 at both ends of the connecting rod, and the first wing steel plate arranged on the first U-shaped groove 2 and the second wing steel plate 3 arranged on the second U-shaped groove, fixed by the fixing nut 8.

It is characterized in that a through hole is opened at the U-shaped top of the first U-shaped groove 5 and the second U-shaped groove 6, the connecting rod passes through the small hole, and the ball-and-socket joint is located inside the U-shaped top of the U-shaped groove. A fixed rod 9 is respectively arranged on the first wing steel plate and the second wing steel plate, and the fixed rod is inserted into the first U-shaped groove and the second U-shaped groove respectively, and the fixed rod is positioned at the middle part of the U-shaped groove. Internal threads 12 are provided at the U-shaped openings of the second U-shaped groove and the U-shaped openings of the first U-shaped groove and the second U-shaped groove.

It is characterized in that the first wing steel plate and the second wing steel plate are arranged at right angles to the fixing bar.

It is characterized in that the fixing nut is against the fixing rod, and a positioning block 11 is placed between the fixing rod and the ball-and-socket joint.

It is characterized in that a plurality of steel plate holes are provided on the first wing steel plate and the second wing steel plate, and sacroiliac screws 10 are fixedly connected in the steel plate holes.

It is characterized in that there are 2 to 4 steel plate holes on the first wing steel plate and the second wing steel plate respectively.

It is characterized in that the diameter of the fixing rod is 5.5mm, and the groove width of the first U-shaped groove and the second U-shaped groove is 6.5mm.

In one embodiment, the first wing steel plate 2 and the second wing steel plate 3 are arranged at right angles to the fixing rod 9 . In another embodiment, the fixing bar 9 can also form other necessary angles with the first wing steel plate 2 and the second wing steel plate 3, and the specific angle depends on the design requirements.

The first wing plate 2 and the second wing plate 3 are provided with a plurality of plate holes, on which sacroiliac screws 10 are arranged. In a preferred embodiment, there are 2-4 steel plate holes on the first wing steel plate and the second wing steel plate respectively.

Fig. 5 and Fig. 6 show the schematic effect of using the ilium fixation device fixed on the ilium. When in use, the medical staff first make an arc-shaped incision on the back and upper side of the bilateral iliac spine, the incision direction is along the iliac crest, the affected side is about 6-8cm, and the healthy side is about 4-6cm. Then, the two wing plates 2 and 3 were plasticized according to the shape of the back of the patient's ilium, and the plates were placed through the incision, so that the two wing plates were fully attached to the two ilium wings. The sacroiliac screw 10 is then implanted from the rear side of the iliac crest, and fixedly connected in the steel plate hole of the steel plate. Then the connecting rod 1 is pre-bent, penetrated subcutaneously through an incision on one side, and passes through an incision on the other side. Press the fixing rods 9 of the steel plates on both sides into the U-shaped grooves 5 and 6 at the two ends of the connecting rod, then tighten the fixing nuts 8, and the fixing nuts press against the fixing rods, the positioning catch and the ball-and-socket joint for fixing.

The invention is mainly used for patients with percutaneous fixation of posterior iliac ring fractures, and its main advantage is that it provides an internal fixation device that is easy to operate and safe to use. When performing percutaneous minimally invasive surgery with the traditional two-wing fixed posterior pelvic plate, the plate needs to be turned over first, and the plate is inserted through the subcutaneous channel through the incision on one side. Covering the bone surface, because the angle of the two wings is fixed, it is extremely difficult to place this kind of steel plate, the operation is cumbersome, and the steel plate is not easy to adhere to the bone surface. Through the ingenious structural design of the device, the two wings and the main body of the steel plate are set as a detachable structure, which is very convenient for implantation, and can achieve the purpose of stably fixing the fracture of the posterior pelvic ring, which is convenient for percutaneous placement and bone surface attachment. The implantation of the steel plate is simpler and safer, and the invention has a novel concept, is easy to popularize, and has strong practicability.

Claims (4)

1. An ilium fixation device, comprising a connecting rod, characterized in that: a first U-shaped groove and a second U-shaped groove are arranged symmetrically at the two ends of the connecting rod through a ball-and-socket joint at the two ends of the connecting rod respectively , the first wing steel plate set on the first U-shaped groove and the second wing steel plate set on the second U-shaped groove are fixed by fixing nuts, and there are Through the small hole, the connecting rod passes through the small hole, the ball-and-socket joint is located inside the U-shaped top of the U-shaped groove, and a fixed rod is respectively set on the first wing steel plate and the second wing steel plate, and the fixed rods are respectively inserted into the first U-shaped U-shaped groove and the second U-shaped groove, the fixed rod is located in the middle of the U-shaped groove, and internal threads are provided at the U-shaped openings of the first U-shaped groove and the second U-shaped groove, and the fixed nut is connected to the first U-shaped groove. The internal thread screw connection provided at the U-shaped opening of the groove and the second U-shaped groove. 2 . The ilium fixation device according to claim 1 , wherein the first wing steel plate and the second wing steel plate are arranged at right angles to the fixing rod. 3 . 3. The iliac bone fixation device according to claim 1, wherein the fixing nut is against the fixing rod, and a positioning block is placed between the fixing rod and the ball-and-socket joint. 4. The ilium fixation device according to any one of claims 1 to 3, wherein the diameter of the fixing rod is 5.5mm, and the groove width of the first U-shaped groove and the second U-shaped groove is 6.5mm.