Combined internal fixation bone fracture plate for acetabular quadrilateral fracture

Abstract

The utility model relates to a combined type internal fixation bone fracture plate for acetabular quadrilateral fracture, which belongs to the technical field of medical instruments, and consists of an inner side bone fracture plate and a front side bone fracture plate, the shape of the inner side bone fracture plate and the shape of the front side bone fracture plate are both attached to the bone surface, from the pubic tuberosity, the pubic comb and the arcuate line to the front side of the sacroiliac joint, of the hip bone of the human body, the two ends of the inner side bone fracture plate and the two ends of the front side bone fracture plate are both subjected to fillet treatment, and a plurality of temporary fixing holes are formed in the inner side bone fracture plate and the front side bone fracture plate. The device is simple in structure, small in damage to soft tissue of a patient, capable of saving operation time, good in patient prognosis and capable of achieving restoration while fixing, greatly reduces operation difficulty, enhances the fixing effect and reduces postoperative complications, thereby being more convenient for people to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a combined internal fixation bone plate for acetabulum quadrilateral fractures. Background Art

[0002] The pelvis is a complete closed bone ring that connects the spine and lower limbs. It is composed of the hip bone, sacrum and coccyx. Pelvic fractures are often accompanied by injuries to the blood vessels, nerves, soft tissues and organs around the pelvis. Among them, acetabular quadrilateral fractures are more complicated and more difficult to treat. The acetabular quadrilateral is a quadrilateral area formed by the inversion of the ischial body behind the acetabulum. Its upper boundary is the arcuate line, the lower boundary is the upper edge of the ischial tuberosity at the bottom of the vertical body of the ischium, the anterior boundary is the posterior edge of the obturator foramen, and the posterior boundary is the greater sciatic notch. Due to the complex anatomical characteristics of the quadrilateral, high-energy injury mechanism, and high risk of Residual rate and mortality rate, the treatment of acetabular quadrilateral fractures has always been a difficulty and focus in the field of trauma. The traditional surgical method for acetabular quadrilateral fractures is open reduction and internal fixation. Commonly used surgical approaches include modified Stoppa approach, pararectus approach, ilioinguinal approach, etc. The advantage of open reduction and internal fixation is that the surgeon can directly visualize the injury site at the incision and perform reduction. However, due to the deep injury site and complex anatomical structure of acetabular quadrilateral fractures, as well as unreasonable plate design, this treatment method often takes a long time, causes great trauma, and causes a lot of intraoperative bleeding.

[0003] By describing the different treatment methods and techniques for pelvic fractures, we can conclude the following problems with internal fixation of pelvic fractures:

[0004] 1. The trauma site is deep, the anatomical structure is irregular, the bone plate needs to be repeatedly reshaped, the risk of iatrogenic neurovascular injury is high, intraoperative bleeding is heavy, the operation time is long, and the trauma is large: Due to the deep injury site of acetabular quadrilateral fracture and the irregular anatomical structure, internal fixation often requires a long operation time. During the operation, the shape of the bone plate must be shaped on site and continuously inserted into the patient's body for adjustment, which causes greater tissue trauma and the risk of iatrogenic neurovascular injury, making the operation more difficult, with more intraoperative bleeding and the possible increase in the risk of surgical complications such as anemia and infection.

[0005] 2. Difficulty in surgical reduction: Acetabular quadrilateral fractures are generally more complicated, with fractures displaced in two planes, making reduction difficult. The currently common integrated bone plates require complete reduction before fixation, which places high demands on temporary fixation and reduction. The surgery is more difficult, and some can only fix one plane, resulting in uncertain fixation effects.

[0006] In summary, the traditional internal fixation using an integrated plate has many difficulties and shortcomings, which lead to problems such as difficult surgical reduction, high intraoperative risk, and many postoperative complications. Therefore, in order to reduce surgical risks and postoperative complications, improving surgical methods and designing more reasonable plates are the challenges and problems that the internal fixation of acetabular quadrilateral fractures currently needs to face. Utility Model Content

[0007] The purpose of the present invention is to provide a combined internal fixation bone plate for acetabular quadrilateral fractures with a simple structure and reasonable design in order to solve the above problems.

[0008] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0009] A combined internal fixation plate for acetabular quadrilateral fractures, the internal fixation plate consisting of a medial plate and an anterior plate, the shapes of which both fit the bone surface of the human hip bone from the pubic tubercle, pubic pectus, arcuate line to the front of the sacroiliac joint.

[0010] As a further optimization solution of the present invention, a plurality of temporary fixing holes are provided on the medial bone plate and the front bone plate.

[0011] As a further optimization solution of the present invention, the medial bone plate and the front bone plate are both provided with a plurality of locking pressure holes that are staggered with the temporary fixation holes.

[0012] As a further optimization solution of the present invention, sliding pressure reduction holes are provided on both the medial bone plate and the front bone plate.

[0013] As a further optimization solution of the present invention, grooves corresponding to the temporary fixing holes are provided on both sides of the medial bone plate and the front bone plate.

[0014] As a further optimization solution of the present invention, the edges of the medial bone plate and the front bone plate are both rounded.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The internal fixation plate is designed to fit the bone surface of the human hip bone from the pubic tubercle, pubic comb, arcuate line to the front of the sacroiliac joint. There is no need to shape the plate on site during surgery. The plate is thin, has a weak foreign body sensation, and the surgical incision is small, causing little damage to the patient's soft tissue, saving operation time and improving the patient's prognosis.

[0017] 2. During the operation, the bone can be fixed and reduced at the same time, and the bone plate can be used as a reduction template for reduction. It can also be reduced separately on the front and medial planes, which greatly reduces the difficulty of the operation and enhances the fixation effect. Each bone plate has a sliding pressure reduction hole for reduction and sliding pressure, as well as a temporary fixation hole for temporary fixation. There is ample adjustment space and it is more convenient to use.

[0018] In summary: the utility model not only has a smaller surgical wound, causes less damage to the patient's soft tissue, saves operation time, and has a good prognosis for the patient, but also can fix and reduce at the same time, which greatly reduces the difficulty of the operation, enhances the fixation effect, and reduces the occurrence of postoperative complications, making it more convenient for people to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a first structural schematic diagram of the medial bone plate of the present invention;

[0021] Figure 3 This is a second structural schematic diagram of the medial bone plate of the present invention;

[0022] Figure 4 This is a first structural schematic diagram of the front bone fracture plate of the present invention;

[0023] Figure 5 This is a second structural schematic diagram of the front bone fracture plate of the present invention.

[0024] In the figure: 1. Medial fixation plate; 2. Anterior bone plate; 3. Temporary fixation hole; 4. Locking pressure hole; 5. Sliding pressure reduction hole; 6. Groove. DETAILED DESCRIPTION

[0025] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0026] like Figure 1 - Figure 5As shown, a combined internal fixation plate for acetabular quadrilateral fracture is provided, the internal fixation plate is composed of a medial plate 1 and an anterior plate 2, the shapes of the medial plate 1 and the anterior plate 2 are both fitted to the bone surface of the human hip bone from the pubic tubercle, pubic comb, arcuate line to the anterior side of the sacroiliac joint, the edges of the medial plate 1 and the anterior plate 2 are both rounded, a plurality of temporary fixation holes 3 are opened on the medial plate 1 and the anterior plate 2, a plurality of locking pressure holes 4 are opened on the medial plate 1 and the anterior plate 2 and are staggered with the temporary fixation holes 3, the medial plate 1 and the anterior plate 2 are both staggered with the temporary fixation holes 3, The lateral bone plates 2 are each provided with a sliding pressure reduction hole 5, and both sides of the medial bone plate 1 and the front bone plate 2 are provided with a groove 6 corresponding to the temporary fixation hole 3. The medial bone plate 1 and the front bone plate 2 are fixed vertically, and the locking pressure holes 4 of the medial bone plate 1 and the front bone plate 2 are all locking screw holes, which will not cause changes due to stress concentration during the fixation process due to unreasonable design of the bone plate, and the fixation is more firm. The medial bone plate 1 and the front bone plate 2 are rounded to avoid soft tissue irritation and are safer to use. There are grooves on both sides of the bone plate to facilitate shaping during surgery;

[0027] The medial bone plate 1 is 117-136 mm long, 7.5 mm wide, and 2.5 mm thick. From the front to the back, the medial bone plate 1 has: a temporary fixation hole 3 with a diameter of 2.1 mm, a locking and pressure hole 4 with a diameter of 3.5 mm, a total of 10-12 temporary fixation holes 3, 9-11 locking and pressure holes 4, a 14 mm long sliding pressure reduction hole 5, a 3.5 mm diameter locking and pressure hole 4, and a 2.1 mm diameter temporary fixation hole 3. The interval between the holes is 2 mm. There are 9-11 pairs of grooves 6 on both sides of the medial bone plate 1.

[0028] The anterior bone plate 2 is 126.5-145.5 mm long, 7.5 mm wide, and 2.5 mm thick. From the front to the back, the anterior bone plate 2 has: a temporary fixation hole 3 with a diameter of 2.1 mm, a locking pressure hole 4 with a diameter of 3.5 mm, a total of 11-13 temporary fixation holes 3, 10-12 locking pressure holes 4, a sliding pressure reduction hole 5 with a length of 14 mm, a locking pressure hole 4 with a diameter of 3.5 mm, and a temporary fixation hole 3 with a diameter of 2.1 mm. The interval between the holes is 2 mm, and there are 10-12 pairs of grooves 6 on both sides of the anterior bone plate 2.

[0029] It should be noted that, in the combined internal fixation plate for acetabular quadrilateral fracture, the mechanism of injury of the acetabular quadrilateral is that the acetabulum is violently impacted forward and inward by the femoral head. Therefore, when the acetabular quadrilateral is fractured, the inner side is more difficult to reset. Therefore, the inner plate 1 is reset and fixed first, and the inner plate 1 and the anterior plate 2 of appropriate specifications are selected according to the range and size of the fracture. During the operation, the fracture position is determined, and the conventional surgical approach is used to incise and clearly expose the fracture. The inner and anterior plates are respectively fixed. Reset the bone and use the bone plate as a reduction template. Place the innermost side of the medial plate 2 on the pubic bone on the pubic symphysis side. Use a 2mm Kirschner wire to temporarily fix the innermost temporary fixing hole 3 of the medial plate 2. After perspective, adjustment, and determination of the position, first use ordinary screws to pressurize and fix the innermost locking pressure hole 4 and make the medial plate 1 fit the bone surface. Remove the innermost Kirschner wire and insert a 2mm Kirschner wire into the outermost temporary fixing hole 3 of the medial plate 1 for temporary fixation. After perspective, adjustment, and determination of the position, use ordinary screws to fix the innermost locking pressure hole 4 and make the inner plate 1 fit the bone surface. The medial plate 1 is slid and pressurized to fix the reduction hole 5, and the fracture fragment is pulled so that the fracture fragment is reduced and fixed with the anatomical plate as the reduction template. The outermost Kirschner wire is removed, and the medial plate 1 is used as the reduction template. The reduction forceps and Kirschner wire are used to assist in reduction. The innermost side of the front plate 2 is placed on the pubic bone on the pubic symphysis side, and a 2mm Kirschner wire is used to temporarily fix the innermost temporary fixation hole 3 of the front plate 2. After the fluoroscopy, adjustment, and determination of the position, the innermost locking pressure hole 4 is first locked with a normal The screws are used to apply pressure to fix the anterior bone plate 2 and make it fit the bone surface. The innermost Kirschner wire is removed and a 2mm Kirschner wire is inserted into the outermost temporary fixation hole 3 of the anterior bone plate 2 for temporary fixation. After fluoroscopy, adjustment and determination of the position, ordinary screws are used to apply pressure to the sliding pressure reduction hole 5 of the anterior bone plate 2 to fix the fracture. The fracture fragment is pulled so that the fracture fragment is reduced and fixed using the anatomical bone plate as a reduction template. The outermost Kirschner wire is removed and the anterior bone plate 2 is used as a reduction template. The reduction forceps and Kirschner wire are used to assist in reduction. The fluoroscopy, adjustment and determination of the position are performed again.

[0030] According to the actual situation, use locking screws to fix the remaining locking pressure holes 4 of the medial plate 1 and the anterior plate 2 one by one, remove the ordinary screws of the sliding pressure reduction holes 5 and the innermost locking pressure holes 4 of the medial plate 1 and the anterior plate 2, and finally fix the innermost locking pressure holes 4 of the medial plate 1 and the anterior plate 2 with locking screws, and remove all remaining Kirschner wires. It should be noted that if during the reduction process, the Kirschner wire or ordinary screw affects the reduction of the fracture or the placement and fixation of another plate, the Kirschner wire should be removed or the ordinary screw should be withdrawn, and temporarily fixed again.

[0031] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A combined internal fixation plate for acetabular quadrilateral fractures, characterized in that: The internal fixation bone plate consists of a medial bone plate (1) and a front bone plate (2). The shapes of the medial bone plate (1) and the front bone plate (2) both fit the bone surface of the human hip bone from the pubic tubercle, pubic pectus, arcuate line to the front side of the sacroiliac joint.

2. The combined internal fixation plate for acetabular quadrilateral fracture according to claim 1, characterized in that: A plurality of temporary fixing holes (3) are provided on both the medial bone fracture plate (1) and the anterior bone fracture plate (2).

3. The combined internal fixation plate for acetabular quadrilateral fracture according to claim 1, characterized in that: The medial bone fracture plate (1) and the front bone fracture plate (2) are both provided with a plurality of locking pressure holes (4) arranged in an interlaced manner with the temporary fixing holes (3).

4. The combined internal fixation plate for acetabular quadrilateral fracture according to claim 3, characterized in that: The medial bone fracture plate (1) and the front bone fracture plate (2) are both provided with sliding pressure reduction holes (5).

5. The combined internal fixation plate for acetabular quadrilateral fracture according to claim 1, characterized in that: Both sides of the medial bone fracture plate (1) and the front bone fracture plate (2) are provided with grooves (6) corresponding to the temporary fixing holes (3).

6. The combined internal fixation plate for acetabular quadrilateral fracture according to claim 1, characterized in that: The edges of the medial bone plate (1) and the front bone plate (2) are both rounded.

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