Patella percutaneous reduction holder
By designing a percutaneous reduction clamp suitable for the patella, the complex problem of internal fixation surgery for closed reduction of patella fractures in the prior art is solved, and the surgery is simple and efficient, and suitable for the treatment of complex patella comminuted fractures.
Patent Information
- Application Number
- CN202420670915.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-02
AI Technical Summary
The lack of suitable surgical instruments in the prior art leads to the complex and complicated internal fixation surgery for the closed reduction of patella fractures, especially for complex patella comminuted fractures.
A percutaneous reduction clamping device of patella is designed, adopting a scissor-type structure, including a first and second clamping arm that are articulated with each other. The clamping part is adapted to the appearance of the patella, and can form a clamping ring for reduction and temporary fixation of the fracture end.
Through the use of this clamp, the closed reduction internal fixation surgery for patella fractures has become more simple and efficient, and can achieve closed reduction internal fixation of complex patella comminuted fractures more conveniently without sacrificing the reduction and fixation quality.
Smart Images
Figure CN222584591U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of patellar fracture surgical instruments, in particular to a patellar percutaneous reduction clamp. 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 is that closed reduction and internal fixation of the patella is difficult to achieve due to the lack of corresponding surgical instruments. The surgical steps are complicated and the surgery and anesthesia time are long. Moreover, for more complicated comminuted patellar fractures, closed reduction and internal fixation is still difficult to achieve due to the lack of effective intraoperative reduction and fixation instruments.
[0006] The original intention of designing the utility model is to make the closed reduction and internal fixation operation of patellar fracture more simple and efficient, and to more conveniently realize the closed reduction and internal fixation of complex comminuted patellar fracture without sacrificing the reduction and fixation quality. Utility Model Content
[0007] The utility model aims to provide a patella percutaneous reduction clamp to solve the technical problem in the prior art that it is difficult to complete the minimally invasive surgery of closed reduction and internal fixation of patella fracture due to the lack of matching surgical instruments.
[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0009] The utility model provides a patella percutaneous reduction clamp, which is a scissor-type structure, comprising a first clamp arm and a second clamp arm hinged to each other, wherein the head end of the first clamp arm is provided with a first clamping part, and the head end of the second clamp arm is provided with a second clamping part; when the first clamping part and the second clamping part are closed to each other, a clamping ring adapted to the shape of the patella can be formed, so as to reduce and temporarily fix the displaced bone fracture ends.
[0010] Furthermore, the first clamping part and the second clamping part have the same structure and are arranged opposite to each other, and the cross-sectional shape of the first clamping part or the second clamping part is adapted to the shape of half of the patella.
[0011] Furthermore, finger rings are provided at the tail ends of the first clamp arm and the second clamp arm.
[0012] Furthermore, it also includes a locking structure arranged between the first clamp arm and the second clamp arm.
[0013] Furthermore, the locking structure is a slot device.
[0014] Furthermore, the locking structure includes an adjusting screw and a nut, the head end of the adjusting screw is fixed on the first clamp arm, a through hole is provided at a corresponding position on the second clamp arm, and the adjusting screw is connected to the nut after passing through the through hole.
[0015] Furthermore, the first clamping portion includes an inner ring and an outer ring, both of which are semicircular structures, and the inner ring and the outer ring are arranged side by side with intervals, and both ends are fixed together to form the first clamping portion with a middle slideway.
[0016] Furthermore, two Kirschner wire sleeves are symmetrically arranged on the first clamping portion at positions corresponding to the slideway; and the inner cavity of the Kirschner wire sleeve is connected to the slideway.
[0017] Furthermore, the head ends of the first clamp arm and the second clamp arm are both L-shaped structures.
[0018] The patellar percutaneous reduction clamp provided by the utility model can clamp the fracture fragments and adjust the reduction under the monitoring of the fluoroscopy machine, so as to achieve the effect of anatomical reduction of the patellar articular surface. Through the clamping and reduction of the clamp, the closed reduction and internal fixation surgery of the patellar fracture can be made simpler and more efficient, and under the premise of not sacrificing the reduction and fixation quality, the closed reduction and internal fixation of complex comminuted patellar fractures can be achieved more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] 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.
[0020] Figure 1 It is a front view of the patellar percutaneous reduction clamp of the utility model when in use;
[0021] Figure 2 It is a side view of the patellar percutaneous reduction clamp of the utility model when in use;
[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the first clamping part in the patellar percutaneous reduction clamp of the utility model;
[0023] Figure 4 The utility model is a structural schematic diagram of the patellar percutaneous reduction clamper with the clamping part removed.
[0024] In the figure, 1, patella percutaneous reduction clamp; 11, first clamping part; 12, locking structure; 121, first clamping strip; 122, second clamping strip; 123, clamping groove; 124, hook; 13, finger ring; 14, inner ring; 15, outer ring; 16, slideway; 17, Kirschner wire sleeve; 18, second clamping part; 3, internal fixation nail; 100, patella. DETAILED DESCRIPTION
[0025] 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.
[0026] like Figure 1 As shown, the utility model provides a patella percutaneous reduction clamp 1 for clamping and temporarily reducing the patella. Specifically, the patella percutaneous reduction clamp 1 is a scissor-type structure, including a first clamp arm and a second clamp arm hinged to each other, the head end of the first clamp arm is provided with a first clamping portion 11, and the head end of the second clamp arm is provided with a second clamping portion 18; when the first clamping portion 11 and the second clamping portion 18 are close to each other and closed, a clamping ring adapted to the shape of the patella can be formed to reduce and temporarily fix the displaced fracture ends.
[0027] It should be noted here that the two clamping parts of the patellar percutaneous reduction clamp 1 can be moved away from each other to open and prepare for clamping the patella 100; the two clamping parts can also be moved closer to each other to close to form a clamping ring similar to a circle, so as to dynamically reduce the patella during the closing process and temporarily fix the patella after closing. Furthermore, the shapes of the two clamping parts and the shape of the clamping ring are not very regular semicircles and circles, but are similar to semicircles or circles, and can be set according to the shape of the human patella, as long as the two clamping parts are closed together to form a full circle of clamping rings that can fit the shape of the patella to achieve the reduction and fixation of the patella.
[0028] like Figure 4 As shown, further, the head ends of the first clamp arm and the second clamp arm are both L-shaped structures, the first clamp portion 11 is arranged at the end of the L-shaped head end of the first clamp arm, and the second clamp portion 18 is arranged at the end of the L-shaped head end of the second clamp arm. Specifically, the angle at the corner of the L-shaped head ends of the first clamp arm and the second clamp arm may not be 90°. The reason for setting it into an L shape is that the first clamp portion 11 and the second clamp portion 18 can be closed together to form a clamping circle when they are close to each other. Therefore, the L-shaped angle of the head end can be greater than 90°, less than 90°, or equal to 90°. The specific angle to be adopted should be determined based on the shape of the human patella, the length of the first clamp arm and the second clamp arm, and the shape of the first clamp portion 11 and the second clamp portion 18. As long as it can be ensured that when the first clamp arm and the second clamp arm are closed, the first clamp portion 11 and the second clamp portion 18 can perfectly clamp the human patella.
[0029] In this embodiment, in order to facilitate processing and operation, the first clamping portion 11 and the second clamping portion 18 have exactly the same structure, and the first clamping portion 11 and the second clamping portion 18 are arranged relative to each other, so that the first clamping portion 11 can be closed or loosened when the first clamp arm and the second clamp arm approach or move away from each other; and the cross-sectional shape of the first clamping portion 11 or the second clamping portion 18 is adapted to the shape of half of the patella, so as to form a complete patella-shaped clamping ring when the two are closed.
[0030] Through this structural setting, a clamping ring that matches the shape of the patella can be formed when the first clamping part 11 and the second clamping part 18 are close to each other and closed, so as to facilitate the fixation of the fractured patella after reduction; that is, the first clamping part 11 and the second clamping part 18 in the clamped state are similar to a circular ring (two semicircles with the same diameter combined together) that is similar to the shape of the patella in the closed state.
[0031] like Figure 2 and Figure 3As shown, further, in order to facilitate the determination of the needle insertion position after the patella is clamped and positioned, in the utility model, the first clamping portion 11 and the second clamping portion 18 are not solid structures, but hollow structures with an intermediate slide 16. Specifically, the first clamping portion 11 includes an inner ring 14 and an outer ring 15, and the inner ring 14 and the outer ring 15 are both semicircular structures, and the inner ring 14 and the outer ring 15 are arranged side by side at intervals, and the two ends are fixed together to form a first clamping portion 11 with an intermediate slide 16.
[0032] like Figure 3 As shown, that is to say, the two annular clamping parts in the utility model are characterized by being composed of two parallel metal rings, namely an inner ring 14 and an outer ring 15, and a slideway 16 is formed between the inner ring 14 and the outer ring 15. The spacing of the slideway 16 is 3-5mm, and the optimal is 4mm. The function is that when the clamp clamps the patella, the coronal plane of the nail is determined, and a Kirschner wire sleeve 17 is provided thereon for inserting a Kirschner wire for temporary fixation, so as to enhance the holding force of the clamp on the bone block during percutaneous reduction.
[0033] By forming a middle slideway 16 in the middle of the clamping portion in the width direction, the needle insertion position can be determined through the middle slideway 16 to facilitate the drilling of the internal fixation nail 3.
[0034] Furthermore, two K-wire sleeves 17 are symmetrically arranged on the first clamping portion 11 at positions corresponding to the slideway 16 ; the inner cavity of the K-wire sleeve 17 is communicated with the slideway 16 .
[0035] When the patellar fracture is relatively broken, the Kirschner wire sleeve 17 can be used to temporarily fix the patellar fracture before the internal fixation nail 3 is drilled.
[0036] Furthermore, in order to facilitate operation and gripping, finger rings 13 are provided at the tail ends of the first clamp arm and the second clamp arm.
[0037] like Figure 4 As shown, in order to maintain the stability of clamping, a locking structure 12 is also included between the first clamp arm and the second clamp arm.
[0038] like Figure 4 As shown, further, the locking structure 12 can be a slot 123 device. It should be noted here that the slot 123 device can be a slot 123 device on a towel clamp in the prior art, for example, Figure 4As shown, the slot device may include a first clip strip 121 and a second clip strip 122, and the first clip strip 121 and the second clip strip 122 are respectively arranged on the first clamp arm and the second clamp arm, and are close to the finger ring 13; a hook 124 is arranged on the first clamp strip 121, and a plurality of slots 123 are arranged on the second clamp strip 122. When in use, the hook 124 is inserted into different slots 123 to adjust the opening and closing degree of the first clamp arm and the second clamp arm head end. Since the slot device on the towel clamp is a prior art, it will not be described here.
[0039] Furthermore, as another optional embodiment of the utility model, the locking structure can also be implemented using the following structure. Specifically, the locking structure includes an adjusting screw and a nut. The head end of the adjusting screw is fixed on the first clamp arm, and a through hole is provided at a corresponding position on the second clamp arm. The adjusting screw passes through the through hole and is connected to the nut.
[0040] When in use, the adjusting screw can be passed through the through hole and loosely connected to the nut, and then when the clamping part clamps and fixes the patella, the nut can be tightened to achieve the locking of the locking structure. In addition, it should be noted that the nut can be placed separately and taken out each time it is used, or the nut can be rotatably fixed to the second clamp arm. As for which form is used, the present invention does not specifically limit it.
[0041] The patellar percutaneous reduction clamp provided by the utility model can clamp the fracture fragments and adjust the reduction under the monitoring of the fluoroscopy machine, so as to achieve the effect of anatomical reduction of the patellar articular surface. Through the clamping and reduction of the clamp, the closed reduction and internal fixation surgery of the patellar fracture can be made simpler and more efficient, and under the premise of not sacrificing the reduction and fixation quality, the closed reduction and internal fixation of complex comminuted patellar fractures can be achieved more conveniently.
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] 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.
[0047] 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.
[0048] 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 patellar percutaneous reduction clamp, characterized in that: It is a scissor-type structure, including a first clamp arm and a second clamp arm hinged to each other, the head end of the first clamp arm is provided with a first clamping part, and the head end of the second clamp arm is provided with a second clamping part; when the first clamping part and the second clamping part are close to each other and closed, a clamping ring adapted to the shape of the patella can be formed to reposition and temporarily fix the displaced fracture ends; the first clamping part and the second clamping part have the same structure and are arranged opposite to each other, and the cross-sectional shape of the first clamping part or the second clamping part is adapted to the shape of half of the patella; the first clamping part includes an inner ring and an outer ring, both of which are semicircular structures, and the inner ring and the outer ring are arranged side by side and spaced apart, and the two ends are fixed together to form the first clamping part with an intermediate slide.
2. The patellar percutaneous reduction clamp according to claim 1, characterized in that: Finger rings are provided at the tail ends of the first clamp arm and the second clamp arm.
3. The patellar percutaneous reduction clamp according to claim 1, characterized in that: Also included is a locking structure disposed between the first clamp arm and the second clamp arm.
4. The patellar percutaneous reduction clamp according to claim 3, characterized in that: The locking structure is a slot device.
5. The patellar percutaneous reduction clamp according to claim 3, characterized in that: The locking structure includes an adjusting screw and a nut. The head end of the adjusting screw is fixed on the first clamp arm. A through hole is provided at a corresponding position on the second clamp arm. The adjusting screw is connected to the nut after passing through the through hole.
6. The patellar percutaneous reduction clamp according to claim 2, characterized in that: Two Kirschner wire sleeves are symmetrically arranged on the first clamping portion at positions corresponding to the slideway; and the inner cavity of the Kirschner wire sleeve is communicated with the slideway.
7. The patellar percutaneous reduction clamp according to claim 2, characterized in that: The head ends of the first clamp arm and the second clamp arm are both L-shaped structures.