Wire feeder applied to patella fracture closed reduction internal fixation
By designing a wire feeder for internal fixation of patella fractures, the problem of lack of special cable traction tools in patella fracture surgery is solved, and more convenient and safe cable traction and fixation is achieved, improving surgical efficiency and patient recovery effect.
Patent Information
- Application Number
- CN202420664421.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-04-02
AI Technical Summary
In the closed reduction internal fixation surgery for patellar fractures, the lack of special high-strength cable traction tools leads to the operator to use hemostasis forceps instead, which is inconvenient to operate and can easily lead to cable falloff, prolong the operation time, and may aggravate the pulling damage of subcutaneous soft tissue.
A wire feeder for internal fixation of the patella fracture is designed, including a handle, an extension rod and a threading part. By creating a subcutaneous tunnel on the back of the patella, the high-strength cable is guided to the other end of the inner fixing nail, which facilitates the completion of cable knotting and tension band fixing.
It provides a more convenient and safe high-strength cable traction tool, which reduces surgical time, reduces the risk of subcutaneous soft tissue damage, and improves the efficiency of cable fixation and tension band formation.
Smart Images
Figure CN222870556U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of surgical instruments for patellar fractures, in particular to a wire feeder used for closed reduction and internal fixation of patellar fractures. 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] At present, in closed reduction and internal fixation surgery for patellar fractures, high-strength cables need to be pulled, passed through the subcutaneous tunnel to reach the ideal position, and then the cables are tightened and knotted to complete the tension band netting. However, there is currently no dedicated high-strength cable traction tool, and surgeons usually use hemostatic forceps instead. Although hemostatic forceps can also play the role of cable traction, they are not convenient to use and are prone to fall off during traction due to the loose clamping of the cable by the forceps tip, which prolongs the operation time; on the other hand, since the plane configuration of the hemostatic forceps is a triangular structure, when the length of the subcutaneous tunnel that needs to be passed is long, the tail end of the hemostatic forceps will aggravate the traction injury of the subcutaneous soft tissue. Utility Model Content
[0006] The utility model aims to provide a wire feeder used for closed reduction and internal fixation of patellar fractures, so as to solve the technical problem of high-strength cable pulling operation without special tools in the prior art.
[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0008] The utility model provides a wire feeder for closed reduction and internal fixation of patellar fracture, comprising a handle, an extension rod, and a threading part; wherein:
[0009] The handle is connected to one end of the extension rod;
[0010] The threading portion is arranged at the other end of the extension rod.
[0011] Furthermore, the threading portion includes a flat head end and a wire feeding hole; the flat head end is arranged at the end of the extension rod; the number of the wire feeding holes is two, and they are arranged at intervals on the flat head end.
[0012] Furthermore, the two wire feeding holes are arranged one on the left and one on the right.
[0013] Furthermore, the flat head end includes a neck and a head, the head is an arc-shaped structure, the neck is a bell-mouth-shaped structure, the thin end is connected to the extension rod, and the thick end is connected to the head.
[0014] Furthermore, the thickness from the beginning of the extension rod to the end of the flat head is a decreasing structure.
[0015] Furthermore, the threading portion includes a pointed tip and a threading hole; the pointed tip has a triangular cross-section, and the threading hole is arranged through the pointed tip along a width direction to form a triangular threading hole.
[0016] Furthermore, the bottom end surface of the pointed tip is an arc-shaped inclined surface structure.
[0017] Furthermore, the extension rod is a straight rod or a curved rod.
[0018] Furthermore, when the extension rod is a curved rod, its arc shape is an arc-shaped structure that bends downward.
[0019] Furthermore, an anti-slip structure is provided on the handle.
[0020] The utility model provides a wire feeder for closed reduction and internal fixation of patellar fractures, which is used to make a subcutaneous tunnel on the back of the patella, and guide the high-strength cable exposed at one end of the internal fixation nail through the tunnel to the high-strength cable exposed at the other end of the internal fixation nail or at one end of another internal fixation nail, so as to facilitate the final cable knotting tension band fixation. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] 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.
[0022] Figure 1 It is a structural schematic diagram of an embodiment of the utility model of a wire feeder applied to closed reduction and internal fixation of patellar fracture;
[0023] Figure 2 It is a structural schematic diagram of a second embodiment of the wire feeder of the utility model applied to closed reduction and internal fixation of patellar fracture;
[0024] Figure 3 It is a structural schematic diagram of a third embodiment of the utility model of a wire feeder for closed reduction and internal fixation of patellar fractures.
[0025] In the figure, 5 is the wire feeder; 51 is the handle; 52 is the extension rod; 53 is the wire feeding hole; 54 is the flat end; and 55 is the pointed end. 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] Embodiment 1:
[0028] like Figure 1 As shown, in order to solve the problem of high-strength cable pulling without special tools, in this embodiment, the utility model provides a wire feeder for closed reduction and internal fixation of patellar fractures. The wire feeder 5 has an appearance similar to a micro periosteal stripper used in orthopedic surgery, and includes a handle 51, an extension rod 52, and a threading part; wherein:
[0029] The handle 51 is connected to one end of the extension rod 52;
[0030] The threading portion is arranged at the other end of the extension rod 52 .
[0031] In this embodiment, the threading portion includes a flat head end 54 and a wire feeding hole 53; the flat head end 54 is disposed at the end of the extension rod 52;
[0032] Furthermore, Figure 1As shown, the flat head end includes a neck and a head, the head is an arc-shaped structure, the neck is a bell-mouth-shaped structure, the thin end is connected to the extension rod 52, and the thick end is connected to the head.
[0033] Furthermore, the thickness decreases from the beginning of the extension rod 52 to the end of the flat head end 54 , that is, the head of the flat head end is the thinnest part.
[0034] like Figure 1 As shown, in this embodiment, there are two wire feeding holes 53 , which are spaced apart on the flat head end 54 .
[0035] Furthermore, two wire feeding holes 53 are arranged side by side, one on the left and one on the right.
[0036] Furthermore, an anti-slip structure is provided on the handle.
[0037] It should be noted here that the anti-skid structure can be made of anti-skid patterns, anti-skid protrusions, anti-skid materials, etc. Since this part can be implemented using the structure in the existing technology, no excessive requirements or repeated descriptions are made here.
[0038] Embodiment 2:
[0039] The difference between the second embodiment and the first embodiment is that, in the second embodiment, Figure 2 As shown, the threading portion includes a pointed head 55 and a threading hole 53; the pointed head 55 has a triangular cross section, and the threading hole 53 is arranged through the width direction of the pointed head 55 to form a triangular threading hole 53. The width of the pointed head 55 is about 3-5 mm.
[0040] It should be noted that the width direction of the tip here refers to Figure 2 The radial direction of the extension rod 52 shown, that is, Figure 2 The direction indicated by the arrow.
[0041] Since the threading portion has a triangular tip 55, in this embodiment, the thickness of the extension rod 52 decreases from the starting end, that is, the end connected to the handle 51, to the end, that is, the end connected to the tip 55, and the connection between the extension rod 52 and the tip 55 is the thinnest.
[0042] In order to improve the smoothness of the wire feeder when in use, in this embodiment, the bottom end surface of the tip 55 is an arc-shaped inclined surface structure.
[0043] It should be noted here that the arc-shaped inclined surface structure refers to an arc-shaped structure that bulges downward.
[0044] Embodiment 3:
[0045] The difference between the present embodiment 3 and the embodiment 2 is that, in the present embodiment, the extension rod 52 is specifically defined. Figure 1 and Figure 2 As shown, the extension rod 52 can be a straight rod. Of course, the extension rod 52 can also be Figure 3 The curved rod shown.
[0046] When the extension rod 52 is a curved rod, its arc shape is a downwardly curved structure.
[0047] The utility model provides a wire feeder for closed reduction and internal fixation of patellar fractures, which is used to make a subcutaneous tunnel on the back of the patella, and guide the high-strength cable exposed at one end of the internal fixation nail through the tunnel to the high-strength cable exposed at the other end of the internal fixation nail or at one end of another internal fixation nail, so as to facilitate the final cable knotting tension band fixation.
[0048] When in use, the proximal end of the high-strength cable in the first internal fixation nail is passed through the two wire feeding holes of the wire feeder in turn, and the head end of the wire feeder is used to close the periosteum on the back of the patella to perform soft tissue sneak peeling, create a subcutaneous tunnel on the back of the patella, and pass the high-strength cable from the proximal skin nail hole of the first internal fixation nail to the distal skin nail hole of the second internal fixation nail through the tunnel, and meet with the distal end of the second high-strength cable; using the same method, the proximal end of the second high-strength cable is met with the distal end of the first high-strength cable, and the cables at the two meeting points are tightened and knotted in turn, finally forming a cross tension band on the back of the patella, so that the tensile stress on the dorsal side of the patella is converted into compressive stress between the fracture ends when the patient flexes the knee after surgery, thereby enhancing the fixation effect.
[0049] 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.
[0050] 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.
[0051] 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.
[0052] 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.
[0053] 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.
[0054] 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.
[0055] 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 wire feeder for closed reduction and internal fixation of patellar fractures, characterized in that: It includes a handle, an extension rod, and a threading part; wherein: The handle is connected to one end of the extension rod; The threading portion is arranged at the other end of the extension rod; the threading portion includes a flat head end and a wire feeding hole; the flat head end is arranged at the end of the extension rod; the number of the wire feeding holes is two, which are arranged at intervals on the flat head end.
2. The wire feeder for closed reduction and internal fixation of patellar fracture according to claim 1, characterized in that: The two wire feeding holes are arranged one on the left and one on the right.
3. The wire feeder for closed reduction and internal fixation of patellar fracture according to claim 1, characterized in that: The flat head end comprises a neck and a head, the head is an arc-shaped structure, the neck is a bell-mouth-shaped structure, a thin end is connected to the extension rod, and a thick end is connected to the head.
4. The wire feeder for closed reduction and internal fixation of patellar fracture according to claim 1, characterized in that: The thickness from the beginning of the extension rod to the end of the flat head is a decreasing structure.
5. The wire feeder for closed reduction and internal fixation of patellar fracture according to claim 1, characterized in that: The threading portion includes a pointed head and a threading hole; the pointed head has a triangular cross section, and the threading hole is arranged through the pointed head along the width direction to form a triangular threading hole.
6. The wire feeder for closed reduction and internal fixation of patellar fracture according to claim 5, characterized in that: The bottom end surface of the pointed head is an arc-shaped inclined surface structure.
7. The wire feeder for closed reduction and internal fixation of patellar fracture according to claim 1, characterized in that: The extension rod is a straight rod or a curved rod.
8. The wire feeder for closed reduction and internal fixation of patellar fracture according to claim 7, characterized in that: When the extension rod is a curved rod, its arc shape is a downwardly curved arc structure.
9. The wire feeder for closed reduction and internal fixation of patellar fracture according to claim 1, characterized in that: The handle is provided with an anti-slip structure.