Fixing guider and traction suite with resetting and fixing functions

Abstract

The utility model relates to a fixed guider and a traction suite with resetting and fixing functions. The fixed guider comprises a main body and a handle arranged on the main body, a first through hole and a plurality of second through holes are formed in the length direction of the main body in a penetrating manner; each second through hole is provided with a second hole inlet and a common second hole outlet, and the common second hole outlets are located at the end, abutting against the bone, of the body. Wherein the first through hole is configured to allow the guide needle to penetrate through and be implanted into a bone, and the hollow screw is implanted into the bone from the first through hole under the guidance of the guide needle; the second through hole is configured to allow the positioning needle to penetrate through and be implanted into the bone, so that the angle and the position of the fixed guider are fixed. The utility model further provides a traction kit with resetting and fixing functions. The traction kit comprises a fixing guider, a positioning needle, a guide needle and a hollow screw. According to the invention, a stable fixing effect can be provided while fracture reduction is carried out, operative wounds are reduced, and postoperative complications are reduced.

Description

Technical Field

[0001] This application belongs to the field of orthopedic device technology, and specifically relates to a fixation guide and a traction kit with repositioning and fixation functions. Background Technology

[0002] In the field of fracture reduction and fixation, traditional treatment methods primarily rely on surgical reduction and internal fixation techniques. Commonly used internal fixation devices include bone plates, screws, pins, and external fixators. These techniques are widely used in practice and have achieved good results in most fracture treatments; however, they have certain limitations in specific situations and still exhibit the following shortcomings in practice:

[0003] Complex Procedure: In current techniques, for some complex fractures, traction reduction and internal fixation often need to be performed in stages. After reduction, additional fixation is required, increasing the complexity of the surgery. Especially in the treatment of complex fractures such as long bone or pelvic fractures, traction devices are often used for reduction. Traction force, through external mechanical action, helps adjust and align the fracture ends. However, this method usually requires multiple steps, and additional internal fixation is needed after traction to maintain the reduced position. After reduction, fixation is often achieved using screws, plates, locking plates, etc., to ensure the fracture remains stable during healing. However, internal fixation is cumbersome, requiring precise implantation and multiple instrument changes, increasing the complexity and time of the surgery, as well as the surgical risks and the chance of infection.

[0004] Insufficient reduction precision: Traditional traction reduction devices have difficulty in accurately controlling the alignment of fracture ends, especially in multi-segment fractures or comminuted fractures. Uneven distribution of traction force may lead to unsatisfactory reduction. Even with imaging guidance, the reduction process still relies on the doctor's touch and experience, which may lead to errors.

[0005] Patient discomfort: External fixators are widely used as a temporary fixation method for some open fractures or multiple fractures. Although external fixators can provide a certain degree of stability, their stability is poor and they are prone to redisplacement. Furthermore, patients experience poor comfort while wearing external fixators, and prolonged use can easily lead to infection, skin pressure injury, or soft tissue complications. At the same time, external fixators also restrict patients' daily activities and rehabilitation exercises, affecting the recovery process.

[0006] Poor fixation stability: In some cases, internal fixation devices cannot simultaneously provide reduction and stability. For example, in fractures around the hip joint or pelvic fractures, internal or external fixation alone may not provide sufficient stability, easily leading to redisplacement or misalignment of the fracture ends, affecting healing outcomes.

[0007] Significant trauma: Multi-step procedures and complex instrument implantation processes can lead to greater tissue trauma and prolong patient recovery time. Especially in minimally invasive surgery, the separation of repositioning and fixation increases the invasiveness of the procedure, failing to fully realize the advantages of minimally invasive techniques.

[0008] In summary, while existing fracture reduction and fixation techniques are widely used in orthopedic surgery, they suffer from drawbacks such as complex procedures, insufficient reduction precision, poor fixation stability, significant trauma, and patient discomfort. These shortcomings are particularly pronounced when dealing with complex fractures, periarticular fractures, or pelvic fractures. Utility Model Content

[0009] In view of the above analysis, the present invention aims to provide a fixed guide and a traction kit with reset and fixing functions to solve one or more of the above-mentioned problems existing in the prior art.

[0010] The purpose of this utility model is achieved as follows:

[0011] On one hand, a fixing guide is provided, including a main body and a handle disposed on the main body; a first through hole and a plurality of second through holes are provided along the length direction of the main body; each of the plurality of second through holes has a second hole inlet and a common second hole outlet, the common second hole outlet being located at one end of the main body that abuts against the bone;

[0012] The first through hole is configured to allow the guide pin to pass through and be implanted into the bone, and the hollow screw is implanted into the bone through the first through hole under the guidance of the guide pin.

[0013] The second through-hole is configured to allow the positioning pin to pass through and be implanted into the bone to fix the angle and position of the fixation guide.

[0014] Furthermore, the first through hole is a regular through hole; or, the wall of the first through hole is provided with a side opening, the length of which is equal to the axial length of the through hole.

[0015] Furthermore, the handle is located on the outer wall of the body at the end relatively far from the bone.

[0016] Furthermore, the handle has a grip section and a connecting section, with the connecting section perpendicularly connected to the main body and the grip section and connecting section connected at an angle.

[0017] Furthermore, the angle between the grip section and the main body is 110°-145°.

[0018] Furthermore, the angle between the grip section and the main body is 120°.

[0019] Furthermore, the length of the connecting segment is 1 / 4 to 3 / 10 of the length of the holding segment.

[0020] Furthermore, the handle is equipped with weight-reducing holes.

[0021] Furthermore, weight-reducing holes are provided on the grip section, and the weight-reducing holes are elongated holes.

[0022] On the other hand, a traction kit with reset and fixation functions is also provided, including the aforementioned fixation guide, as well as a guide pin, a positioning pin, and a hollow screw.

[0023] Furthermore, the outer diameter of the guide pin is 1.6 mm; the outer diameter of the hollow bone screw is 6 mm, and the inner diameter is 2-3 mm.

[0024] Compared with the prior art, the fixation guide and traction kit with repositioning and fixation functions provided by this utility model have both repositioning and fixation functions. They can provide traction force during the repositioning process to make the fracture ends accurately adjusted, and keep the fracture position fixed after repositioning, reducing the risk of fracture re-displacement. This solves the defects of insufficient repositioning accuracy, poor fixation stability and complicated operation in traditional technology, and significantly improves the efficiency and effect of fracture treatment. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 A schematic diagram of the first angle structure of a fixed guide provided by this utility model;

[0027] Figure 2 A schematic diagram of the second angle structure of a fixed guide provided by this utility model;

[0028] Figure 3 Schematic diagram of the structure of the traction kit with reset and fixation functions provided by this utility model Figure 1 ;

[0029] Figure 4 A partial structural diagram of the traction kit with reset and fixation functions provided by this utility model. Figure 1 ;

[0030] Figure 5 A partial structural diagram of the traction kit with reset and fixation functions provided by this utility model. Figure 2 ;

[0031] Figure 6 Disassembly of the traction kit with reset and fixation functions provided by this utility model Figure 1 ;

[0032] Figure 7 A schematic diagram of a traction kit with reset and fixation functions according to this utility model. Figure 1 ;

[0033] Figure 8 A schematic diagram of the second angle structure of another fixed guide provided by this utility model;

[0034] Figure 9 Schematic diagram of the structure of the traction kit with reset and fixation functions provided by this utility model Figure 2 ;

[0035] Figure 10 Disassembly of the traction kit with reset and fixation functions provided by this utility model Figure 2 ;

[0036] Figure 11 A schematic diagram of a traction kit with reset and fixation functions according to this utility model. Figure 2 .

[0037] Figure label:

[0038] 1. Fixed guide; 11. Main body; 111. First through hole; 1111. First hole inlet; 1112. First hole outlet; 112. Second through hole; 1121. Second hole inlet; 1122. Second hole outlet; 12. Handle; 121. Grip section; 122. Connecting section; 123. Weight reduction hole;

[0039] 2. Positioning pin;

[0040] 3. Guide needle;

[0041] 4. Hollow screw; 41. Threaded section; 411. Self-tapping groove; 42. Plain section; 421. Tightening part. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be noted that, unless otherwise specified, the implementation methods and features in the implementation methods in this disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] In the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0044] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0045] For descriptive purposes, this disclosure may use spatial relative terms such as “top,” “bottom,” “below,” “under,” “under,” “below,” “above,” “above,” “higher,” etc., which are relative to components, to describe the relationship between one component and another (other) component as shown in the accompanying drawings.

[0046] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0047] Example 1

[0048] A specific embodiment of this utility model is as follows: Figures 1 to 11As shown, a fixation guide 1 is disclosed, including a main body 11 and a handle 12 disposed on the main body 11, the handle 12 being for the operator to hold; a first through hole 111 and a plurality of second through holes 112 are provided along the length direction of the main body 11; each of the plurality of second through holes 112 has a second hole inlet 1121 and a common second hole outlet 1122, the common second hole outlet 1122 being located at one end of the main body 11 that abuts against the bone; wherein, the first through hole 111 is configured to allow a guide pin 3 to pass through and be implanted into the bone, and a hollow screw 4 is implanted into the bone through the first through hole 111 under the guidance of the guide pin 3; the second through holes 112 are configured to allow a positioning pin 2 to pass through and be implanted into the bone, so as to achieve the fixation of the angle and position of the fixation guide.

[0049] In this embodiment, the handle 12 is located on the outer wall of the end of the main body 11 that is relatively far away from the bone. The shape and position of the handle 12 will not block the first inlet 1111 of the first through hole 111 and the second inlet 1121 of the second through hole 112.

[0050] Specifically, the handle 12 has a gripping section 121 and a connecting section 122. The connecting section 122 is perpendicularly connected to the main body 11, and the gripping section 121 and the connecting section 122 are connected at an angle. For example, the angle between the gripping section 121 and the main body 11 is 110°-145°. Preferably, the angle between the gripping section 121 and the main body 11 is 120°.

[0051] In one alternative embodiment, the length of the connecting segment 122 is 1 / 4 to 3 / 10 of the length of the grip segment 121. This parameter setting provides a more comfortable grip angle for the operator, and the presence of the connecting segment 122 allows for better observation of the positions of the first through hole 111 and the second through hole 112 during operation, facilitating operation.

[0052] In this embodiment, the handle 12 is provided with a weight-reducing hole 123 to reduce the overall weight of the fixed guide 1. Optionally, the weight-reducing hole 123 is provided on the grip section 121, and the weight-reducing hole 123 is an elongated hole.

[0053] In this embodiment, the number of first through holes 111 on the main body 11 of the fixed guide 1 is one, and the number of second through holes 112 is multiple. By setting multiple inclined second through holes 112, positioning of the positioning pin 2 at different angles can be achieved.

[0054] In one optional embodiment, each of the plurality of second through holes 112 has a second hole inlet 1121 and a common second hole outlet 1122. The common second hole outlet 1122 is located at the end of the main body 11 that abuts against the bone, and the plurality of second hole inlets 1121 are located at the end of the main body 11 that is away from the bone. The positioning pin 2 is inserted into the bone through different second through holes 112 to adjust the angle and fixed position of the fixation guide 1. That is, only one first through hole 111 has a first hole inlet 1111 and a first hole outlet 1112. A portion of the plurality of second through holes 112 overlaps and has a common channel. The center lines of the non-overlapping portions of the plurality of second through holes 112 are at a certain angle to each other. Among the non-overlapping portions of the plurality of second through holes 112, at most one second through hole 112 has a center line parallel to the center line of the first through hole 111, while the rest are at a certain angle to the center line of the first through hole 111. This arrangement is to facilitate the adjustment of different fixed angles of the fixation guide 1. This structural design allows the main body 11 of the fixation guide 1 to be set to a smaller size, especially the main body 11 near the bone end is designed to be small.

[0055] It is understood that the multiple second through holes 112 can be independent through holes, each second through hole 112 has a second hole inlet 1121 and a second hole outlet 1122, all second hole outlets 1122 do not overlap, the channels of each second through hole 112 do not overlap, the multiple second through holes 112 are arranged at an angle, and the center lines of the multiple second through holes 112 are at different angles from the center line of the first through hole 111.

[0056] For example, the main body 11 has four second through holes 112, of which the second inlets 1121 of three second through holes 112 are located on the same straight line, and the second inlet 1121 of the fourth second through hole 112 is located between the straight line of the three second through holes 112 and the first inlet 1111 of the first through hole 111. This arrangement of the second through holes 112 allows the relatively large number of second inlets 1121 to be as far away from the first inlet 1111 as possible, avoiding interference with the pre-implanted positioning pin 2 when inserting the guide pin 3 and the hollow screw 4.

[0057] In minimally invasive surgery, the manipulator of a minimally invasive robot holds and fixes the guide needle 3, and inserts the guide needle 3 into the bone along the first through-hole 11. The manipulator then releases the guide needle 3, allowing it to exit through the first through-hole 111. In practice, releasing the guide needle 3 requires a certain amount of operating space. If the diameter of the first through-hole 111 is too small, it hinders the release and withdrawal of the manipulator. Increasing the diameter of the first through-hole 111 requires increasing the size of the main body 11, which is not conducive to minimally invasive procedures. Therefore, to facilitate easier withdrawal of the guide needle 3 from the first through-hole 111 after insertion into the bone by the manipulator of the minimally invasive robot, in one optional embodiment, see [reference needed]. Figures 8 to 11 The first through hole 111 is configured as a semi-open hole, and a side opening 1113 is provided on the wall of the first through hole 111 along the axial direction, allowing the operating clamping end to enter and exit the first through hole 111 through the side opening 1113. Specifically, the first through hole 111 is a slot, and the bottom wall surface of the slot is curved. The wall of the first through hole 111 is not a complete cylindrical surface. The axial direction of the slot is arranged along the length direction of the main body 11. In addition to the openings at both ends along the axial direction, the slot has a side opening 1113 on its wall. The length of the side opening 1113 is equal to the length of the main body 11. It can also be understood that the slot is set on the outer wall of the main body 11, and the axial length of the slot is equal to the axial length of the main body 11.

[0058] This embodiment also discloses a traction kit with reset and fixation functions, hereinafter referred to as the "traction kit". See [link / reference] Figures 3 to 7 , Figures 9 to 11 The traction kit includes the aforementioned fixation guide 1, as well as a positioning pin 2, a guide pin 3, and a hollow screw 4. The positioning pin 2 is configured to be implanted into the bone through a second through hole 112 to fix the angle and position of the fixation guide 1. The guide pin 3 is configured to be implanted into the bone through a first through hole 111. The hollow screw 4 has a central channel and can be fitted onto the guide pin 3. It is configured to be implanted into the bone through the first through hole 111 under the guidance of the guide pin 3.

[0059] In one alternative embodiment, the outer diameter of the guide pin 3 is 1.6 mm; the outer diameter of the hollow bone screw is 6 mm, and the inner diameter is greater than 1.6 mm. For example, the inner diameter of the hollow bone screw is 2-3 mm.

[0060] In one alternative embodiment, the diameter of the positioning pin 2 is greater than or equal to the diameter of the guide pin 3. Optionally, the diameter of the positioning pin 2 is 1.8-2 mm.

[0061] In this embodiment, the front end of the hollow screw 4 is provided with a threaded section 41, and the threaded section 41 has bone threads.

[0062] Furthermore, the front end of the threaded section 41 is provided with a self-tapping groove 411, which facilitates smoother implantation into the bone.

[0063] Furthermore, the rear end of the hollow screw 4 is provided with a smooth section 42, and the tail end of the smooth section 42 is provided with a tightening part 421 that cooperates with a tightening tool. Optionally, the tightening part 421 can be at least one cutting plane located on the circumferential surface of the smooth section 42, that is, the tightening part 421 includes at least one cutting plane located on the circumferential surface of the smooth section 42.

[0064] During implementation, the main body 11 of the fixation guide 1 is first placed against the bone surface. A positioning pin 2 is inserted into one of the second through holes 112 and implanted into the bone to initially fix the position of the main body 11 of the fixation guide 1. The angle and insertion position of the positioning pin 2 are confirmed using CT or X-ray methods. If not, the positioning pin 2 is removed and inserted into the second through hole 112 at another angle until the insertion angle is satisfied. The positioning pin 2 is then implanted and fixed at the first predetermined depth. After the angle of the fixation guide 1 is initially fixed, a thin guide pin 3 is inserted into the first through hole 111. A hollow screw 4 is then used to implant the guide pin 3 into the bone at the second predetermined depth and fix it, thus completing the implantation of the traction kit. The first predetermined depth is less than the second predetermined depth. After reduction, the traction kit can be left directly at the fracture site as part of the fixation device, ensuring fracture stability by combining external fixation (such as plates or external fixators) or internal fixation (such as screws or locking plates).

[0065] Because the pelvic bone is very thin, directly screwing the hollow screw 4 into the pelvic bone could potentially tear the pelvic wall, causing damage to the surrounding soft tissues and nerves. In this embodiment, the position and angle of the guide 1 are initially fixed using the positioning pin 2, thus determining the precise insertion position of the hollow bone screw in advance. Then, a very thin guide pin 3 is inserted for precise positioning, and the hollow screw 4 is screwed into the bone while being fitted onto the guide pin 3, thereby minimizing damage to the pelvis.

[0066] Compared with the prior art, the fixed guide and the traction kit with reset and fixation functions provided in this embodiment have at least one of the following beneficial effects:

[0067] 1. It integrates repositioning and fixation functions, reducing surgical steps and improving surgical efficiency. Moreover, it has strong fixation stability, enhancing postoperative healing.

[0068] Because the traction kit in this embodiment has both reduction and fixation functions, doctors do not need to replace or add additional fixation devices after completing traction reduction. They can directly perform fixation operations using the traction kit. By reducing multiple instrument changes and fixation steps, the surgical procedure is greatly simplified, surgical time and steps are reduced, and the surgical difficulty is lowered, making the entire surgical process more efficient. The traction kit can not only achieve precise traction reduction, but can also be directly placed at the fracture site as a fixation device to provide continuous and stable support. The fixation effect is stable and can effectively avoid the problem of fracture redisplacement after reduction in traditional fixation methods. It ensures that the fracture maintains an ideal position during the healing process, and the fracture site can maintain a good biomechanical environment, which helps the bone heal quickly and reduces unnecessary secondary surgeries.

[0069] 2. It achieves precise traction and repositioning, effectively reducing repositioning errors and improving treatment outcomes.

[0070] Traditional traction devices may lead to unsatisfactory reduction due to uneven force distribution. However, the traction kit provided in this embodiment can apply continuous, stable, and uniform traction force to the fracture site, ensuring precise alignment of the fracture ends during reduction, reducing reduction errors, and improving the accuracy of fracture reduction. Furthermore, with real-time imaging guidance, doctors can precisely adjust the position of the traction pin and the traction force as needed, restoring the fracture fragments to the ideal anatomical position and ensuring perfect fracture reduction. This is particularly suitable for challenging cases such as multi-segment fractures, comminuted fractures, and complex joint fractures, effectively reducing reduction errors and ensuring treatment effectiveness.

[0071] 3. It is suitable for minimally invasive surgery, reducing patient discomfort and shortening the recovery period.

[0072] Compared to traditional devices such as external fixators, the traction kit in this embodiment is lighter and can complete the repositioning and fixation operations in minimally invasive surgery. This reduces the need for repeated instrument changes and fixation device implantation in traditional surgery, thus minimizing damage to soft and bone tissues, reducing postoperative discomfort, and potentially shortening recovery time. Due to its minimal trauma and stable fixation, patients can begin rehabilitation exercises earlier, reducing postoperative complications. Furthermore, patients do not need to wear external fixators for extended periods, improving their postoperative quality of life.

[0073] 4. The traction kit is highly adaptable and particularly suitable for complex fracture types such as long bone fractures (e.g., femur, tibia, humerus), periarticular fractures (e.g., hip, knee), and pelvic fractures. Whether it's a multi-segment fracture, a comminuted fracture, or a fracture in the joint area, this technique can achieve precise reduction and fixation.

[0074] 5. The hollow part of the traction kit can also guide the implantation of other fixation devices or biomaterials, providing additional fixation support; for example, drugs can be implanted through the hollow channel of the hollow screw to further enhance the fixation effect.

[0075] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A fixed guide, characterized in that, Includes a main body (11) and a handle (12) disposed on the main body (11); a first through hole (111) and a plurality of second through holes (112) are provided along the length direction of the main body (11); each of the plurality of second through holes (112) has a second hole inlet (1121) and a common second hole outlet (1122), the common second hole outlet (1122) being located at one end of the main body (11) that abuts against the bone; The first through hole (111) is configured to allow the guide pin (3) to pass through and be implanted into the bone, and to allow the hollow screw (4) to be implanted into the bone through the first through hole (111) under the guidance of the guide pin (3). The second through hole (112) is configured to allow the positioning pin (2) to pass through and be implanted into the bone to fix the angle and position of the fixation guide.

2. The fixed guide according to claim 1, characterized in that, The first through hole (111) is a regular through hole; Alternatively, the first through hole (111) may have a side opening (1113) on its wall, the length of which is equal to the axial length of the through hole (111).

3. The fixed guide according to claim 1, characterized in that, The handle (12) is located on the outer wall of the body (11) at the end that is relatively far from the bone.

4. The fixed guide according to claim 3, characterized in that, The handle (12) has a grip section (121) and a connecting section (122), the connecting section (122) being perpendicularly connected to the body (11), and the grip section (121) and the connecting section (122) being angularly connected.

5. The fixed guide according to claim 4, characterized in that, The angle between the gripping section (121) and the main body (11) is 110°-145°.

6. The fixed guide according to claim 5, characterized in that, The angle between the gripping section (121) and the main body (11) is 120°.

7. The fixed guide according to claim 6, characterized in that, The length of the connecting segment (122) is 1 / 4 to 3 / 10 of the length of the gripping segment (121).

8. The fixed guide according to claim 4, characterized in that, The handle (12) is provided with a weight reduction hole (123).

9. The fixed guide according to claim 8, characterized in that, The weight-reducing hole (123) is provided on the grip section (121), and the weight-reducing hole (123) is an elongated hole.

10. A traction kit with reset and fixation functions, characterized in that, The fixed guide according to any one of claims 2 to 9 further includes a guide pin (3), a positioning pin (2), and a hollow screw (4).

Images