Pelvic fracture reduction and fixation kit

Abstract

The present invention relates to a pelvic fracture reduction and fixation kit, which is used in conjunction with an X-ray machine, and the difference is that it includes a fixing frame, which is connected to a bed; an adjusting frame, the head end of which is connected to the fixing frame, and the adjusting frame includes at least three sections of adjusting rods connected head to tail in sequence and a connecting piece connecting two adjacent adjusting rods, wherein at least one connecting piece is a connecting shaft, and at least one connecting piece is a connecting sleeve; and a positioning cylinder, which is connected to the tail end of the adjusting frame, and the positioning cylinder has a first positioning hole suitable for a Kirschner wire to pass through and two second positioning holes suitable for a stimulation needle of a nerve stimulator to pass through, and the two second positioning holes are respectively parallel to the first positioning hole and symmetrically arranged on both sides of the first positioning hole. The present invention has a simple structure, is easy to operate, has a fully mechanical structure, can be manually operated, can change direction in a universal direction, and can also fix the direction, so that the Kirschner wire can accurately reach the desired position, thereby improving the success rate of reduction and fixation.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and in particular to a pelvic fracture reduction and fixation kit. Background Art

[0002] Pelvic fracture is a very serious and dangerous fracture. If the injury is serious, it can cause shock or even death. About 20 to 37 people per 100,000 will suffer a pelvic fracture, accounting for about 0.3% to 6% of all fractures. The mortality rate of pelvic fractures without soft tissue or internal organ injury is 10.8%, and the mortality rate of complex pelvic trauma is 31.1%. There are also veins and abnormally rich venous plexuses accompanying arteries in the pelvic cavity. The area of ​​the latter is about 10 to 15 times that of the arteries and they are interconnected. The bones of the pelvis are mainly cancellous bones, the pelvic wall muscles are more, and there are many arterial plexuses and venous plexuses nearby, so fractures can cause extensive bleeding. The dry period deaths of patients with severe pelvic multiple injuries often occur within minutes to hours after the injury, accounting for about 30% of the total deaths. Fracture bleeding is still the primary cause of death in patients with pelvic fractures. The more unstable the pelvic fracture, the greater the corresponding bleeding, and the greater the amount of bleeding, the more dangerous the patient. Therefore, it is very important to reduce and fix the fracture as soon as possible.

[0003] Nowadays, pelvic fractures are mostly treated with open reduction combined with plate fixation or external fixation. The amount of bleeding in open reduction and plate fixation is often large, and open reduction + plate fixation will aggravate the symptoms of blood loss and shock. The external fixator fixes the pelvis but does not pressurize the fracture ends. In addition, the patient loses less blood during closed reduction. However, the pelvis is irregular in shape and has different thicknesses, so the positioning, direction, introduction, reduction, and fixation require high requirements and are difficult to operate. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a pelvic fracture reduction and fixation kit with a simple structure, easy operation, a fully mechanical structure, manual operation, universal direction change, and fixed direction, so that the Kirschner wire can accurately reach the desired position, thereby improving the success rate of reduction and fixation.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a pelvic fracture reduction and fixation kit is used in conjunction with an X-ray machine, the difference of which is:

[0006] It includes a fixing frame connected to the bed body;

[0007] An adjustment frame, the head end of which is connected to the fixed frame, the adjustment frame comprising at least three adjustment rods connected end to end in sequence and a connecting piece connecting two adjacent adjustment rods, wherein at least one of the connecting pieces is a connecting shaft, and at least one of the connecting pieces is a connecting sleeve;

[0008] and

[0009] A positioning cylinder connected to the tail end of the adjustment frame, wherein the positioning cylinder has a first positioning hole suitable for the Kirschner wire to pass through and two second positioning holes suitable for the stimulation needle of the nerve stimulator to pass through, and the two second positioning holes are respectively parallel to the first positioning hole and symmetrically arranged on both sides of the first positioning hole.

[0010] According to the above technical solution, the fixing frame is constructed as a rod-shaped structure which is arranged on one side of the bed and extends vertically upward.

[0011] According to the above technical solution, a first threaded portion is provided on the outer peripheral surface of the connecting shaft, and the connecting member also includes two first locking portions, and the two first locking portions are respectively matched with the second threaded portions provided with the first threaded portion, and the two first locking portions can cooperate with each other to clamp the two adjusting rods connected by the connecting shaft.

[0012] According to the above technical solution, the connecting sleeve includes an outer cylinder portion and an inner cylinder portion arranged in the outer cylinder portion, a third threaded portion is provided on the outer circumferential surface of the inner cylinder portion, a connecting hole that cooperates with the adjusting rod is provided on the inner cylinder portion, and an elastic deformation notch that extends axially and is connected to the connecting hole is symmetrically provided on the inner cylinder portion, the inner circumferential surface of the outer cylinder portion is constructed as a conical surface and a fourth threaded portion that cooperates with the third threaded portion is provided on its inner circumferential surface.

[0013] According to the above technical solution, the positioning cylinder can rotate relative to the adjustment frame.

[0014] According to the above technical solution, the pelvic fracture reduction and fixation kit also includes a support frame detachably arranged on the bed body, a lifting rod detachably arranged on the support frame, and a fixing member for fixing the Kirschner wire on the lifting rod.

[0015] According to the above technical solution, there are two support frames, which are symmetrically arranged on both sides of the bed.

[0016] According to the above technical solution, the fixing part includes a limit block, two fixing clips cooperating with the Kirschner wire and two second locking parts. The two fixing clips and the limit block are sleeved on the lifting rod, and the limit block is located between the two fixing clips. A fifth threaded part is provided on the outer peripheral surface of the lifting rod, and a sixth threaded part cooperating with the fifth threaded part is provided on the second locking part. The two second locking parts can cooperate with each other to clamp the two fixing clips and the limit block.

[0017] Compared with the prior art, the beneficial features of the present invention are as follows: the pelvic fracture reduction and fixation kit, after using an X-ray machine to irradiate the pelvic fracture position, can then adjust the position and angle of the Kirschner wire by adjusting the adjustment frame, so that the Kirschner wire can accurately reach the desired position, thereby improving the success rate of reduction and fixation; the X-ray machine can be used to roughly identify the larger nerves and blood vessels around the pelvis, and then the Kirschner wire parallel to the stimulation needle of the nerve stimulator can be used to detect whether there are important nerves around the Kirschner wire pathway, thereby avoiding damage to major nerves; the kit can also be retracted and folded to save space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a diagram showing the use status of the pelvic fracture reduction and fixation kit according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 An enlarged schematic diagram of the connection relationship between the middle fixing frame, the adjusting frame and the positioning tube;

[0020] Figure 3 for Figure 2 An enlarged schematic diagram of the middle connecting sleeve structure;

[0021] Figure 4 for Figure 3 Exploded diagram of

[0022] Figure 5 for Figure 3 Front view of the middle inner cylinder;

[0023] Figure 6 for Figure 2 An enlarged schematic diagram of the connection relationship between the middle adjustment rod and the connecting sleeve, wherein only a partial schematic diagram of the connecting sleeve is shown;

[0024] Figure 7 for Figure 2 An enlarged schematic diagram of the center positioning tube structure;

[0025] Figure 8 for Figure 7 A cross-sectional view of

[0026] Fig. 9 for Figure 2 An enlarged schematic diagram of the connection between the middle adjustment frame and the positioning cylinder;

[0027] Fig.10 This is a diagram showing the use status of the pelvic fracture reduction and fixation kit according to an embodiment of the present invention;

[0028] Fig.11 This is a diagram showing the use status of the pelvic fracture reduction and fixation kit according to an embodiment of the present invention;

[0029] Fig.12 It is an enlarged schematic diagram of the connection relationship between the support frame, the lifting rod and the fixing member in the embodiment of the present invention;

[0030] Fig.13 This is a schematic diagram of the structure of a C-arm X-ray machine in an embodiment of the present invention;

[0031] Fig.14 It is a schematic diagram of the installation positions of the Kirschner wire and the customer hollow screw in the embodiment of the present invention;

[0032] Wherein: 1-fixed frame, 2-adjusting frame (201-first connecting member (2011-first locking portion), 202-second connecting member (2021-outer cylinder (2021a-inner circumference of outer cylinder), 2022-inner cylinder (20221-connecting hole, 20222-elastic deformation notch)), 203-first adjusting rod (2031-first adjusting rod tail end limiting arm), 204-second adjusting rod (2041-second adjusting rod head end limiting arm, 2042-second adjusting rod tail end limiting arm), 205-third adjusting rod (2051-third adjusting rod head end limiting arm), 206-fourth Adjusting rod (2061-the fourth adjusting rod tail end limiting arm), 207-the fifth adjusting rod (2071-the fifth adjusting rod head end limiting arm), 208-the sixth adjusting rod), 3-positioning cylinder (301-the first positioning hole, 302-the second positioning hole, 303-connecting rod), 4-bed, 5-Kirschner wire, 6-rotating axis, 7-the third locking part, 8-C-arm X-ray machine, 9-support frame (901-cross bar, 902-longitudinal bar), 10-lifting rod, 11-fixing part (1101-limiting block, 1102-fixing clip, 1103-the second locking part), 12-rope, 13-orthopedic hollow nail. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0034] Please refer to Figures 1 to 14The pelvic fracture reduction and fixation kit of the embodiment of the present invention is used in conjunction with a C-arm X-ray machine 14 or a B-ultrasound machine or a CT machine, and can accurately position and reduce the pelvic fracture and apply pressure. The pelvic fracture reduction and fixation kit includes a fixing frame 1, an adjusting frame 2 and a positioning cylinder 3 connected in sequence. The fixing frame 1 is connected to the bed 4. The head end of the adjusting frame 2 is connected to the fixing frame 1, and the tail end of the adjusting frame 2 is connected to the positioning cylinder 3. The adjusting frame 2 includes at least three sections of adjusting rods connected end to end in sequence and a connecting member connecting two adjacent adjusting rods. Each adjusting rod can rotate around the axis of the connecting member connected thereto. The connecting member is divided into a first connecting member 201 and a second connecting member 202, wherein at least one connecting member is a first connecting member 201 and at least one connecting member is a second connecting member 202, the first connecting member 201 is constructed as a connecting shaft, and the second connecting member 202 is constructed as a connecting sleeve. During use, in order to prevent the Kirschner wire from damaging the nerve, the positioning tube 3 has a first positioning hole 301 suitable for the Kirschner wire 5 to pass through and two second positioning holes 302 suitable for the stimulation needle of the nerve stimulator to pass through. The two second positioning holes 302 are respectively aligned with the first positioning hole 301 and symmetrically arranged on both sides of the first positioning hole 301. The stimulation needle inserted into the second positioning hole 302 can detect whether there are important nerves around, thereby reducing damage to the main nerves.

[0035] Please refer to Figure 1 In the embodiment of the present invention, the fixing frame 1 is constructed as a rod-shaped structure arranged on one side of the bed body 4 and extending vertically upward. Figure 2 The adjustment frame 2 includes a first adjustment rod 203, a second adjustment rod 204, a third adjustment rod 205, a fourth adjustment rod 206, a fifth adjustment rod 207, a sixth adjustment rod 208, three first connecting members 201 and two second connecting members 202 which are connected end to end in sequence. The head end of the first adjusting rod 203 is connected to the fixing frame 1, the tail end of the first adjusting rod 203 is connected to the head end of the second adjusting rod 204 through the first connecting member 201, the tail end of the second adjusting rod 204 is connected to the head end of the third adjusting rod 205 through the first connecting member 201, the tail end of the third adjusting rod 205 is connected to the head end of the fourth adjusting rod 206 through the second connecting member 202, the tail end of the fourth adjusting rod 206 is connected to the head end of the fifth adjusting rod 207 through the first connecting member 201, the tail end of the fifth adjusting rod 207 is connected to the head end of the sixth adjusting rod 208 through the second connecting member 202, the tail end of the sixth adjusting rod 208 is connected to the positioning tube 3 through the connecting rod 303, the connecting rod 303 is formed on the outer surface of the positioning tube 3 and is connected to the sixth adjusting rod 208 through the rotating shaft 6.

[0036] Please refer to Figure 2In order to fix the two adjusting rods connected by the first connecting member 201 and prevent them from continuing to rotate after being rotated to the desired position, a first threaded portion is provided on the outer peripheral surface of the first connecting member 201. The first connecting member 201 also includes two first locking portions 2011. The two first locking portions 2011 are respectively matched with the second threaded portions provided with the first threaded portions. The two first locking portions 2011 can cooperate with each other to clamp the two adjusting rods connected by the first connecting member 201.

[0037] Please refer to Figures 3 to 6 In order to effectively rotate and fix the adjusting rod, the second connecting member 202 includes an outer cylinder portion 2021 and an inner cylinder portion 2022 arranged in the outer cylinder portion 2021, a third threaded portion is provided on the outer circumferential surface of the inner cylinder portion 2022, a connecting hole 20221 cooperating with the adjusting rod is provided on the inner cylinder portion 2022, and an elastic deformation notch 20222 extending along its axial direction and communicating with the connecting hole 20221 is symmetrically provided on the inner cylinder portion 2022, the inner circumferential surface 2021a of the outer cylinder portion is constructed as a conical surface, and a fourth threaded portion cooperating with the third threaded portion is provided on its inner circumferential surface 2021a. During assembly, first insert the ends of the two adjusting rods into the connecting holes 20221 of the inner cylinder 2022 respectively, then put the outer cylinder 2021 onto the outer periphery of the inner cylinder 2022, and twist the outer cylinder 2021 until the elastic deformation notch 20222 is squeezed and deformed so that the inner cylinder 2022 clamps the two adjusting rods. The fixation is completed. When it is necessary to rotate the adjusting rod connected by the second connecting member 202, twist the outer cylinder 2021 until the elastic deformation notch 202222 returns to its original state. At this time, the adjusting rod can be rotated. After rotating to the desired position, twist the outer cylinder 2021 again until the adjusting rod is fixed.

[0038] Please refer to Figure 2In the embodiment of the present invention, in order to make the two adjustment rods connected by the first connecting member 201 cooperate more accurately and improve the rotation accuracy. The tail end of the first adjustment rod 203 is formed with two first adjustment rod tail end limiting arms 2031, and there is a gap between the two first adjustment rod tail end limiting arms 2031. The head end of the second adjustment rod 204 is formed with three second adjustment rod head end limiting arms 2041 arranged at intervals. During assembly, the two first adjustment rod tail end limiting arms 2031 are respectively inserted into the gaps between the three second adjustment rod head end limiting arms 2041, and the second adjustment rod head end limiting arm 2041 located in the middle is inserted into the gap between the two first adjustment rod tail end limiting arms 2031. The first connecting member 201 passes through the two first adjustment rod tail end limiting arms 2031 and the three second adjustment rod head end limiting arms 2041 to connect the first adjustment rod 203 and the second adjustment rod 204. The tail end of the second adjusting rod 204 is formed with two second adjusting rod tail end limiting arms 2042, and there is a gap between the two second adjusting rod tail end limiting arms 2042. The head end of the third adjusting rod 205 is formed with three spaced third adjusting rod head end limiting arms 2051. During assembly, the two second adjusting rod tail end limiting arms 2042 are inserted into the gap between the three third adjusting rod head end limiting arms 2051, and the third adjusting rod head end limiting arm 2051 located in the middle is inserted into the gap between the two second adjusting rod tail end limiting arms 2042. The first connecting member 201 passes through the two second adjusting rod tail end limiting arms 2042 and the three third adjusting rod head end limiting arms 2051 to connect the second adjusting rod 204 and the third adjusting rod 205. The tail end of the fourth adjusting rod 206 is formed with two fourth adjusting rod tail end limit arms 2061, and there is a gap between the two fourth adjusting rod tail end limit arms 2061. The head end of the fifth adjusting rod 207 is formed with three interval-arranged fifth adjusting rod head end limit arms 2071. During assembly, the two fourth adjusting rod tail end limit arms 2061 are inserted into the gap between the three fifth adjusting rod head end limit arms 2071, and the fifth adjusting rod head end limit arm 2071 located in the middle is inserted into the gap between the two fourth adjusting rod tail end limit arms 2061. The first connecting member 201 passes through the two fourth adjusting rod tail end limit arms 2061 and the three fifth adjusting rod head end limit arms 2071 to connect the fourth adjusting rod 206 and the fifth adjusting rod 207.

[0039] Please refer to Fig. 9 The outer circumference of the rotating shaft 6 is provided with a seventh threaded portion, the pelvic fracture reduction and fixation kit further includes two third locking portions 7, the third locking portion 7 is provided with an eighth threaded portion that matches the seventh threaded portion, the connecting rod 303 is connected to the sixth adjustment rod 208 through the rotating shaft 6, and is locked by the two third locking portions 7. When the positioning cylinder 3 is to be rotated, the third locking portion 7 is loosened to rotate the positioning cylinder 3, such as Fig. 9 When the positioning cylinder 3 needs to be fixed, the third locking portion 7 is screwed until the connecting rod 303 and the sixth adjusting rod 208 are clamped.

[0040] Please refer to Figures 10 to 12 In order to lift and fix the Kirschner wire 5 to reposition the fracture end, the pelvic fracture reduction and fixation kit also includes a support frame 9 detachably fixed to the bed 4, at least one lifting rod 10 detachably fixed to the support frame 9, and a fixing member 11 for fixing the Kirschner wire 5 on the lifting rod 10.

[0041] Preferably, in order to facilitate supporting the lifting rod 10, there are two support frames 9, which are symmetrically arranged on both sides of the bed body 4. Each support frame 9 includes a crossbar 901 located above one side of the bed body 4 and at least two longitudinal bars 902 connecting the crossbar 901 and the bed body 4. The ends of the lifting rod 10 can be tied and fixed to the crossbar 901 or the longitudinal bar 902 of the support frame 9 on either side by ropes 12.

[0042] Please refer to Fig.12 The fixing member 11 includes a limiting block 1101 , two fixing clips 1102 cooperating with the Kirschner wire 5 , and two second locking portions 1103 . Fig.12 The second locking part 1103 is only partially shown, and its structure is the same as that of the first locking part 2011. Two fixing clips 1102 and the limit block 1101 are sleeved on the lifting rod 10, and the limit block 1101 is located between the two fixing clips 1102. A fifth threaded portion is provided on the outer circumference of the lifting rod 10, and a sixth threaded portion cooperating with the fifth threaded portion is provided on the second locking part 1103. The two second locking parts 1103 can cooperate with each other to clamp the two fixing clips 1102 and the limit block 1101.

[0043] The pelvic fracture reduction and fixation kit according to the embodiment of the present invention causes less damage than general open reduction, has higher accuracy than blind reduction, is simple to operate and can be operated purely manually, has low cost, is highly practical, and can be used in primary medical care.

[0044] Please refer to Figures 1 to 14 The specific method of using the pelvic fracture reduction and fixation kit according to the embodiment of the present invention is as follows:

[0045] Step 1), so that the patient lies flat on the bed 4;

[0046] Step 2), insert two or more Kirschner wires, so that the front end of each Kirschner wire 5 is inserted into the fractured bone and the rear end remains outside the patient's body, and then adjust the Kirschner wires with reference to the X-ray image until the displaced fractured ends are reset in place;

[0047] Step 3), then fix the Kirschner wire 5 in step 2) on the lifting rod 10 and fix the lifting rod 10 on the support frame 9 to achieve the fixation of the fractured bone and the support frame 9, as shown in FIG. Fig.10 and Fig.11 As shown;

[0048] Step 4), then according to the X-ray results roughly determine the insertion direction of the orthopedic hollow screw 13 with the Kirschner wire 5, connecting the fixation frame 1, the adjustment frame 2 and the positioning cylinder 3;

[0049] Step 5), after positioning the positioning cylinder 3 to the general direction, use an X-ray machine to irradiate the adjustment frame 2 and the patient, accurately adjust the adjustment frame 2 until the central axis of the positioning cylinder 3 is located in the insertion direction of the Kirschner wire, and fix the adjustment frame 2 after reaching the position;

[0050] Step 6), then refer to Figure 1 , insert the Kirschner wire 5, so that the Kirschner wire 5 is inserted into the bone until the Kirschner wire 5 reaches the target position as observed by the X-ray machine;

[0051] Step 7), and then insert the orthopedic hollow nail 13 along the Kirschner wire 5;

[0052] Step 8), orthopedic hollow screw 13 is fixed and then remove the Kirschner wire 5;

[0053] Step 9) Suture the small skin wound and the operation is completed.

[0054] The above contents are further detailed descriptions of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. Pelvic fracture reduction and fixation kit, used in conjunction with an X-ray machine, features: It includes a fixing frame connected to the bed body; An adjustment frame, the head end of which is connected to the fixed frame, the adjustment frame comprising at least three adjustment rods connected end to end in sequence and a connecting piece connecting two adjacent adjustment rods, wherein at least one of the connecting pieces is a connecting shaft, and at least one of the connecting pieces is a connecting sleeve; and A positioning cylinder, the positioning cylinder is connected to the tail end of the adjustment frame, the positioning cylinder has a first positioning hole suitable for the Kirschner wire to pass through and two second positioning holes suitable for the stimulation needle of the nerve stimulator to pass through, the two second positioning holes are respectively parallel to the first positioning hole and symmetrically arranged on both sides of the first positioning hole; A first threaded portion is provided on the outer circumferential surface of the connecting shaft, and the connecting member further comprises two first locking portions, wherein the two first locking portions are respectively provided with second threaded portions that cooperate with the first threaded portion, and the two first locking portions can cooperate with each other to clamp the two adjusting rods connected by the connecting shaft; The connecting sleeve includes an outer cylinder portion and an inner cylinder portion arranged in the outer cylinder portion, a third threaded portion is provided on the outer circumferential surface of the inner cylinder portion, a connecting hole that cooperates with the adjusting rod is provided on the inner cylinder portion, and an elastic deformation notch that extends along its axial direction and is connected to the connecting hole is symmetrically provided on the inner cylinder portion, the inner circumferential surface of the outer cylinder portion is constructed as a conical surface and a fourth threaded portion that cooperates with the third threaded portion is provided on its inner circumferential surface.

2. The pelvic fracture reduction and fixation kit according to claim 1, characterized in that: The fixing frame is constructed as a rod-shaped structure which is arranged on one side of the bed body and extends vertically upward.

3. The pelvic fracture reduction and fixation kit according to claim 1, characterized in that: The positioning cylinder can rotate relative to the adjustment frame.

4. The pelvic fracture reduction and fixation kit according to any one of claims 1 to 3, characterized in that: The pelvic fracture reduction and fixation kit also includes a support frame detachably arranged on the bed body, a lifting rod detachably arranged on the support frame, and a fixing piece for fixing the Kirschner wire on the lifting rod.

5. The pelvic fracture reduction and fixation kit according to claim 4, characterized in that: There are two support frames, which are symmetrically arranged on both sides of the bed.

6. The pelvic fracture reduction and fixation kit according to claim 4, characterized in that: The fixing part includes a limit block, two fixing clips cooperating with the Kirschner wire and two second locking parts. The two fixing clips and the limit block are sleeved on the lifting rod, and the limit block is located between the two fixing clips. A fifth threaded part is provided on the outer peripheral surface of the lifting rod, and a sixth threaded part cooperating with the fifth threaded part is provided on the second locking part. The two second locking parts can cooperate with each other to clamp the two fixing clips and the limit block.

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