Coronal plane guider applied to patella fracture closed reduction internal fixation
By designing a C-shaped coronal surface guide, the problem of difficulty in positioning the coronal surface in closed reduction internal fixation of patella fracture is solved, and the surgical steps are simplified and the surgical time is shortened.
Patent Information
- Application Number
- CN202420671346.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-04-02
AI Technical Summary
The lack of suitable surgical instruments in the prior art leads to difficult positioning of the coronary surface during the internal fixation of the closed reduction of patellar fracture, complicated surgical steps, and long surgery and anesthesia time.
A C-shaped coronal surface guide is designed, including a straight arm, a transverse arm and a guide sleeve. Through the design of the length adjustment structure and the step structure, it can be inserted into the percutaneous reduction clamp of the patella and position the internal fixing nail. coronal surface inlet and outlet position.
Through the use of this coronal plane guide, the internal fixation procedure of the closed reduction of patella fracture can be significantly simplified, the surgical and anesthesia time can be shortened, and the efficiency and accuracy of the operation can be improved.
Smart Images
Figure CN222487573U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of patellar fracture surgical instruments, in particular to a coronal plane guide used for closed reduction and internal fixation of patellar fracture. Background Art
[0002] The patella is the largest sesamoid bone in the human body. It is located in front of the knee joint and has the function of protecting the knee joint. The quadriceps muscle is attached to the upper edge of the patella, and part of the fascia continues through the front of the patella as the patellar ligament, ending at the tibial tubercle. The patella plays a vital role in the movement of the human knee. For example, as the intermediate structure of the knee extensor, it transmits the tension generated by the quadriceps muscle to the patellar tendon; the patella acts as a lever when the knee is extended, which can effectively increase the lever arm of the knee extensor for the knee flexion and extension axis; the sliding of the patella on the femoral trochlear surface can also reduce the friction of the quadriceps muscle on the front of the lower end of the femur.
[0003] Patellar fracture is a common intra-articular fracture in clinical practice, which is more common in young and middle-aged people. It is often caused by violent contraction of the quadriceps femoris or direct impact. Patellar fracture involves the articular surface, and is often accompanied by tearing of the expanded part of the quadriceps femoris and intra-articular hematoma. It is prone to knee joint dysfunction and traumatic arthritis. The treatment of patellar fracture requires anatomical reduction, secure fixation and early functional exercise.
[0004] Minimally invasive surgery, represented by closed reduction and internal fixation, is the mainstream direction of surgical development today. Compared with traditional open surgery, closed reduction and internal fixation of patellar fractures causes less trauma to patients, less bleeding during surgery, faster recovery of knee joint function after surgery, and avoids the risk of poor wound healing or even infection caused by extensive stripping and destruction of soft tissue.
[0005] However, the current bottleneck problem is that due to the lack of corresponding surgical instruments, the insertion position of the internal fixation nail cannot be fixed, and the coronal plane position cannot be determined and the needle cannot be inserted quickly, resulting in complicated surgical steps and longer surgery and anesthesia time. Utility Model Content
[0006] The purpose of the utility model is to provide a coronal plane guide for closed reduction and internal fixation of patellar fractures, so as to solve the technical problem in the prior art that there is no matching surgical instrument capable of positioning the coronal plane, resulting in complicated surgical steps and long surgery and anesthesia time.
[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0008] The utility model provides a coronal plane guide for closed reduction and internal fixation of patellar fracture, which has a C-shaped structure and comprises a straight arm, a horizontal arm and a guide sleeve, wherein:
[0009] The horizontal arm is vertically arranged at both ends of the straight arm;
[0010] The guide sleeve is relatively arranged at the inner side of the two cross arms, and a connecting hole is arranged on the cross arm corresponding to the inner cavity position of the guide sleeve.
[0011] Furthermore, a length adjustment structure is provided on the straight arm to achieve length adjustment of the straight arm.
[0012] Furthermore, the straight arm is a split structure, including a first arm and a second arm; the length adjustment structure includes an adjustment column, an adjustment cylinder, an adjustment hole and a locking screw; wherein:
[0013] The adjusting column is a solid structure and is arranged at one end of the first arm;
[0014] The adjusting tube is a hollow structure, and is arranged at one end of the second arm, and most or all of the adjusting tube is buried in the second arm;
[0015] The cross-sectional shapes of the adjusting cylinder and the adjusting column are non-circular cross-sectional shapes, and the inner cavity specifications of the adjusting cylinder are adapted to the specifications of the adjusting column;
[0016] The adjustment hole is a through threaded hole, which is arranged on the second arm and communicates with the inner cavity of the adjustment cylinder;
[0017] The locking screw is threaded on the threaded hole, and the end thereof abuts against the adjusting column.
[0018] Furthermore, the guide sleeve is a stepped structure, including a snap-in section and a supporting section.
[0019] Furthermore, the specification of the communicating hole is equal to the specification of the inner cavity of the guide sleeve.
[0020] Furthermore, the diameter of the communicating hole is not less than the outer diameter of the drilled internal fixing nail.
[0021] The coronal plane guide for closed reduction and internal fixation of patellar fracture provided by the utility model can be inserted into a patellar percutaneous reduction clamp, so as to perform coronal plane positioning on an internal fixation nail that is about to pass through the temporarily fixed patella, so as to facilitate the insertion and removal of the internal fixation nail through the position and direction indicated by the coronal plane guide. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 It is a front cross-sectional view of a coronal plane guide of the utility model used for closed reduction and internal fixation of patellar fracture;
[0024] Figure 2 The utility model is a front view of a coronal plane guide for closed reduction and internal fixation of patellar fracture.
[0025] In the figure, 2 is a coronal plane guide; 21 is a straight arm; 22 is a horizontal arm; 23 is a guide sleeve; 24 is a connecting hole; 25 is an adjusting column; 26 is an adjusting cylinder; 27 is an adjusting hole. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.
[0027] The utility model provides a coronal plane guide for closed reduction and internal fixation of patellar fractures, which is used to be inserted into the patellar percutaneous reduction clamp after the patellar percutaneous reduction clamp clamps and temporarily reduces the patella, so as to perform coronal plane positioning on the internal fixation nail that is about to pass through the temporarily fixed patella, so as to facilitate the insertion of the internal fixation nail through the position and direction indicated by the coronal plane guide 2.
[0028] Specifically, the coronal plane guide 2 used for closed reduction and internal fixation of patellar fracture can be inserted into the clamping part to perform coronal plane positioning of the temporarily fixed patella; the structural feature of the coronal plane guide 2 is that it looks like a capital "C" when viewed from the side, and the coronal plane guide 2 is inserted into the clamping part of the patellar percutaneous reduction clamp to locate the entry point and exit point of the internal fixation nail that will penetrate the temporarily fixed patella, and then the internal fixation nail is drilled into the patella from the position of the coronal plane guide 2 to achieve the internal patellar direction and entry and exit point positioning of the internal fixation nail;
[0029] like Figure 1 As shown, in this embodiment, the coronal plane guide 2 includes a straight arm 21, a cross arm 22, and a guide sleeve 23, wherein:
[0030] The cross arm 22 is vertically arranged at both ends of the straight arm 21 to form a C-shaped coronal surface guide 2; the straight arm 21 and the cross arm 22 can be integrally formed;
[0031] The guide sleeves 23 are relatively arranged at the inner side of the two cross arms 22, and a connecting hole 24 is arranged on the cross arm 22 at a position corresponding to the inner cavity of the guide sleeves 23;
[0032] It should be noted that the directions of the two guide sleeves 23 are always aimed at each other. When the two guide sleeves 23 are clamped on the slideway of the patellar percutaneous reduction clamp, the direction of the internal fixation nail is determined.
[0033] In order to improve the adaptability of the guide and the applicable specifications, the straight arm 21 can be set as a length-adjustable structure, for example, a length-adjustable structure is set on the straight arm 21 to achieve the length adjustment of the straight arm. The adjustable length of the straight arm 21 can be applied to patellar percutaneous reduction clamps of different specifications.
[0034] like Figure 2 As shown, specifically, the straight arm 21 is a split structure, including a first arm and a second arm; the length adjustment structure includes an adjustment column 25, an adjustment cylinder 26, an adjustment hole 27 and a locking screw; wherein:
[0035] The adjustment column 25 is a solid structure and is arranged at one end of the first arm;
[0036] The adjusting tube 26 is a hollow structure, and is disposed at one end of the second arm, and most or all of the adjusting tube 26 is buried in the second arm;
[0037] The cross-sectional shape of the adjusting cylinder 26 and the adjusting column 25 is a non-circular cross-sectional shape, for example, it can be a square, rectangular, triangular, etc.; the inner cavity specification of the adjusting cylinder 26 is adapted to the specification of the adjusting column 25 to ensure that the adjusting column 25 can penetrate into the adjusting cylinder 26, and the gap cannot be too large; when in use, the adjusting column 25 penetrates into the adjusting cylinder 26, and then the insertion depth of the adjusting column 25 is adjusted to adjust the length of the straight arm 21;
[0038] The adjustment hole 27 is a through threaded hole, which is arranged on the second arm. The threaded hole extends vertically to the adjustment cylinder 26 through the surface of the second arm and is communicated with the inner cavity of the adjustment cylinder 26.
[0039] The locking screw is threaded on the threaded hole, and the end thereof abuts against the adjusting column 25 .
[0040] When the adjusting column 25 is adjusted to the right position, the locking screw can be screwed into the adjusting column 25 to abut against the adjusting column 25 , thereby locking the length of the straight arm 21 .
[0041] Of course, the length adjustment structure of the straight arm 21 may also adopt other structural forms, as long as the length adjustment of the straight arm 21 can be achieved. The length adjustment structure of the present invention is not limited to the above embodiments.
[0042] The guide sleeve 23 is a stepped structure, including a snap-in section and a supporting section.
[0043] Since the snap-in section needs to be snapped into the slideway of the patellar percutaneous reduction clamp to achieve the positioning of the needle insertion and exit positions in the coronal plane, in this embodiment, the specifications of the snap-in section are adapted to those of the slideway.
[0044] In this embodiment, for example, when the width of the slide is 4 mm, the width of the snap-in section of the coronal plane guide 2 is not greater than 4 mm to ensure that it can be normally snapped in and can also be fixed in the slide. Specifically, the width of the snap-in section can be 3.7 mm, and the diameter of the support section should be greater than the width of the slide 16 to achieve the supporting effect when the snap-in section is snapped into the slide 16.
[0045] Furthermore, in order to facilitate the insertion of the guide needle of the internal fixation nail, the specifications of the through-hole 24 on the cross arm 22 are equal to the specifications of the inner cavity of the guide sleeve 23, thereby facilitating the guide needle of the internal fixation nail to penetrate from the outside of the cross arm 22 and then drill into the coronal position specified by the guide sleeve 23.
[0046] The coronal plane guide for closed reduction and internal fixation of patellar fracture provided by the utility model can be inserted into a patellar percutaneous reduction clamp, so as to perform coronal plane positioning on an internal fixation nail that is about to pass through the temporarily fixed patella, so as to facilitate the insertion and removal of the internal fixation nail through the position and direction indicated by the coronal plane guide.
[0047] First of all, it should be explained here that “inward” refers to the direction toward the center of the accommodating space, and “outward” refers to the direction away from the center of the accommodating space.
[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0051] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0053] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A coronal plane guide for closed reduction and internal fixation of patellar fractures, characterized in that: It has a C-shaped structure, including a straight arm, a horizontal arm, and a guide sleeve, among which: The horizontal arm is vertically arranged at both ends of the straight arm; The guide sleeve is relatively arranged at the inner side of the two cross arms, and a connecting hole is arranged on the cross arm corresponding to the inner cavity position of the guide sleeve.
2. The coronal plane guide for closed reduction and internal fixation of patellar fracture according to claim 1, characterized in that: The straight arm is provided with a length adjustment structure to achieve length adjustment of the straight arm.
3. The coronal plane guide for closed reduction and internal fixation of patellar fracture according to claim 2, characterized in that: The straight arm is a split structure, including a first arm and a second arm; the length adjustment structure includes an adjustment column, an adjustment cylinder, an adjustment hole and a locking screw; wherein: The adjusting column is a solid structure and is arranged at one end of the first arm; The adjusting tube is a hollow structure, and is arranged at one end of the second arm, and most or all of the adjusting tube is buried in the second arm; The cross-sectional shapes of the adjusting cylinder and the adjusting column are non-circular cross-sectional shapes, and the inner cavity specifications of the adjusting cylinder are adapted to the specifications of the adjusting column; The adjustment hole is a through threaded hole, which is arranged on the second arm and communicates with the inner cavity of the adjustment cylinder; The locking screw is threaded on the threaded hole, and the end thereof abuts against the adjusting column.
4. The coronal plane guide for closed reduction and internal fixation of patellar fracture according to claim 2, characterized in that: The guide sleeve is a stepped structure, comprising a snap-in section and a supporting section.
5. The coronal plane guide for closed reduction and internal fixation of patellar fracture according to claim 1, characterized in that: The specification of the communicating hole is equal to the specification of the inner cavity of the guide sleeve.
6. The coronal plane guide for closed reduction and internal fixation of patellar fracture according to claim 5, characterized in that: The diameter of the communicating hole is not less than the outer diameter of the drilled internal fixing nail.