A device for minimally invasive harvesting of the quadriceps tendon in knee ligament reconstruction
By designing a minimally invasive quadriceps tendon harvesting device for knee ligament reconstruction with an internal channel and a rotatable glass disc, the problems of cumbersome two-handed operation and unstable field of vision were solved. It enables synchronous single-handed movement and full-process visual monitoring, improving surgical efficiency and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING DRUM TOWER HOSPITAL
- Filing Date
- 2025-05-07
- Publication Date
- 2026-07-24
AI Technical Summary
In knee ligament reconstruction surgery, the operation of holding tendon harvesting instruments and arthroscopy with both hands is cumbersome and difficult to move synchronously, resulting in unstable arthroscopic vision, increasing surgical risks and prolonging operation time.
A minimally invasive tendon harvesting device for quadriceps tendon in knee ligament reconstruction surgery was designed, including a rod, a harvesting head, and a transparent glass disc. The rod has a channel for arthroscopic insertion, and the glass disc is rotatably connected. The glass disc is rotated by a drive unit to maintain a clear arthroscopic view and enable one-handed operation and synchronous movement.
This allows for full-process visual monitoring of the tendon harvesting procedure, avoiding the instability of the arthroscopic view, improving operational efficiency and safety, and reducing surgical risks.
Smart Images
Figure CN224540275U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical devices, specifically relating to a minimally invasive tendon harvesting device for quadriceps tendon during knee ligament reconstruction surgery. Background Technology
[0002] In traditional knee ligament reconstruction surgery, minimally invasive tendon harvesting of the quadriceps tendon typically requires the surgeon to operate the tendon harvesting instruments and arthroscopy separately with both hands. Since the arthroscopy is used for real-time observation of the surgical area, while the tendon harvesting instruments (such as tendon scalpels and separators) need to be manipulated precisely under the scope, the surgeon must frequently coordinate hand movements to ensure a clear view and accurate manipulation. However, this approach has significant drawbacks: firstly, independent hand operation can easily lead to asynchrony between the instruments and the camera, causing shaky or lost views and increasing surgical risks; secondly, repeatedly adjusting the arthroscopy position prolongs the surgical time and affects operational efficiency. Therefore, current techniques involving holding the tendon harvesting instruments and arthroscopy separately with both hands are cumbersome, difficult to move synchronously, and prone to causing instability in the arthroscopic view. Utility Model Content
[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a minimally invasive tendon harvesting device for quadriceps tendon in knee ligament reconstruction surgery. This device solves the problems of cumbersome operation and difficulty in synchronous movement when holding the tendon harvesting instrument and arthroscopy separately with both hands in existing technologies, which can easily lead to unstable arthroscopic vision.
[0004] The objective of this utility model can be achieved through the following technical solutions:
[0005] A minimally invasive tendon harvesting device for quadriceps tendon during knee ligament reconstruction surgery includes a rod body;
[0006] The tendon harvesting head is detachably connected to either end of the rod.
[0007] The rod has a channel inside for arthroscopic insertion. The channel is placed coaxially with the rod and passes through both ends of the rod.
[0008] The rod body has a transparent glass disc inside. The glass disc is placed on the same axis as the rod body and is located at the end of the rod body near the tendon head. The projection of the channel along its own axis is located on the inner side of the peripheral wall of the glass disc. The connection position and shape of the tendon head allow the channel to maintain an open and visible space along its axial extension direction.
[0009] The passage is located on one side near the perimeter of the pole;
[0010] The glass disc is rotatably connected inside the rod, and the glass disc can rotate around the central axis of the rod.
[0011] The rod body is equipped with a drive unit that connects to the glass disk. The drive unit is used to drive the glass disk to rotate around its own axis.
[0012] The drive unit includes a rotating rod fixedly connected to one end of the glass disk. The rotating rod and the rod body are placed on the same axis, and the rotating rod is rotatably connected to the inside of the rod body. The rotating rod extends away from the tendon head end of the rod body to the outside of the rod body.
[0013] The drive unit also includes an elastic pad fixed to the end of the rod away from the tendon head. The elastic pad is annular. The rotating rod passes through the inner side of the elastic pad. A pressure plate is fixedly sleeved on the rotating rod. The pressure plate is located on the side of the elastic pad away from the rotating rod, and the pressure plate is in pressure contact with the elastic pad.
[0014] The tendon head has a pair of symmetrically placed clamping strips near the end of the rod body, and a pair of slots adapted to the clamping strips are opened on the peripheral wall of the rod body. One end of the rod body is engaged between the two clamping strips.
[0015] The tendon head has a cylindrical protrusion near the end of the rod body, and the protrusion has external threads on its peripheral wall. A matching threaded groove is opened at one end of the rod body.
[0016] The rod has graduation lines on its peripheral wall along its own axis.
[0017] The handle is fixedly connected to the end of the lever away from the handle.
[0018] A handle is fixedly fitted to the end of the rod away from the tendon head.
[0019] The explanations of the nouns, conjunctions, or adjectives used in the above technical solutions are as follows:
[0020] Fixed connection: refers to a connection method in which two or more components are tightly connected together by welding, gluing or other methods, and cannot be easily separated.
[0021] Rotary connection: refers to a connection where two parts can rotate relative to each other, and is often used in mechanical devices when rotational motion is required.
[0022] The beneficial effects of this utility model are:
[0023] 1. The channel on the rod facilitates the insertion of the arthroscope. The glass disc prevents the arthroscope from accidentally sliding and extending too far without affecting the observation. After extending one end of the arthroscope to near the glass disc, medical staff can hold the rod and arthroscope with one hand for operation. During the operation, the arthroscope and the rod can move synchronously, thus ensuring full visual monitoring of the tendon retrieval process. This effectively solves the problem of cumbersome operation and difficulty in synchronous movement when holding the tendon retrieval instruments and arthroscope separately with both hands in the existing technology, which can easily cause unstable arthroscopic vision.
[0024] 2. The rotating rod is designed to facilitate the rotation and adjustment of the glass disc, thereby moving the clean area on the glass disc to the channel and maintaining a clear view of the arthroscopy. The combination of the elastic pad and the pressure plate reduces the possibility of accidental rotation of the rotating rod under non-human operation. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0027] Figure 2 These are schematic diagrams of the overall structure of this utility model from different perspectives;
[0028] Figure 3 This is an appendix to this utility model. Figure 2 A magnified schematic diagram of the central part of the structure;
[0029] Figure 4 This is a schematic diagram of the cross-sectional structure of the rod body of this utility model;
[0030] Figure 5 This is a schematic diagram of the tendon head structure in Embodiment 1 of this utility model;
[0031] Figure 6 This is a schematic diagram of the tendon head structure in Embodiment 2 of this utility model. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0033] This combination Figures 1 to 6This invention describes an embodiment of a minimally invasive quadriceps tendon harvesting device for knee ligament reconstruction. Specifically, this device is constructed as a split structure, comprising a rod 100, a harvesting head 200, a channel 101, and a glass disc 300. In use, the arthroscope is inserted from the end of the rod 100 away from the harvesting head 200 into the channel 101. The glass disc 300 prevents accidental slippage and excessive insertion of the arthroscope without affecting observation. After extending one end of the arthroscope close to the glass disc 300, medical personnel can operate with one hand holding both the rod 100 and the arthroscope. During operation, the arthroscope and rod 100 move synchronously, ensuring full visualization and monitoring of the harvesting process. This effectively solves the problems of cumbersome operation and difficulty in synchronous movement, which can easily lead to unstable arthroscopic views, when the arthroscope and arthroscope are held separately with both hands in existing technologies.
[0034] Please refer to Figures 1 to 6 A minimally invasive tendon harvesting device for quadriceps tendon in knee ligament reconstruction surgery, comprising a rod 100.
[0035] The tendon-removing head 200 is detachably connected to either end of the rod 100;
[0036] The rod 100 has a channel 101 for arthroscopic insertion inside. The channel 101 is placed coaxially with the rod 100 and passes through both ends of the rod 100.
[0037] The rod 100 has a transparent glass disk 300 inside. The glass disk 300 is placed on the same axis as the rod 100, and the glass disk 300 is located at the end of the rod 100 near the tendon head 200. The projection of the channel 101 along its own axis is located on the inner side of the peripheral wall of the glass disk 300. The connection position and shape of the tendon head 200 make the axial extension direction of the channel 101 maintain an open and visible space.
[0038] Preferably, the tendon head 200 includes a tendon knife or a tendon separator, and the tendon knife or tendon separator can be configured with various sizes and specifications; it should be noted that the tendon knife or tendon separator are existing technologies, therefore, their structures are not described in detail in this application;
[0039] The tendon scalpel is used to cut into the quadriceps tendon and advance the graft proximally as required;
[0040] Tendon separators are used to bluntly dissect the quadriceps tendon, separating the tendon from the fat layer of the vastus intermedius muscle.
[0041] When harvesting the tendon, a tendon scalpel is first used to make a shovel cut, and then a tendon separator is used for blunt dissection.
[0042] It should be noted that the tendon removal kit of this application needs to be used in conjunction with the tendon cutter in the prior art when removing tendons. The tendon cutter is used to cut and sever the separated tendons and remove them.
[0043] An arthroscope is a rod-shaped optical instrument about 5 mm in diameter used to observe the internal structures of a joint. It is an endoscope used to diagnose and treat joint diseases. An arthroscope has a lens at the end of a thin tube. When the thin tube is inserted into the joint, the internal structures of the joint are displayed on a monitor.
[0044] When using the tendon harvesting kit of this application, the arthroscope is inserted into the channel 101 from the end of the rod 100 away from the tendon harvesting head 200. The glass disc 300 prevents the arthroscope from accidentally sliding and excessively extending without affecting the observation of the arthroscope. After extending one end of the arthroscope to near the glass disc 300, medical personnel can hold the rod 100 and the arthroscope with one hand for operation. During the operation, the arthroscope and the rod 100 can be moved synchronously, thus ensuring full visual monitoring of the tendon harvesting process. This effectively solves the problem in the prior art where the tendon harvesting instruments and the arthroscope are held separately with both hands, which is cumbersome to operate and difficult to move synchronously, and easily causes unstable arthroscopic vision.
[0045] Channel 101 is located on one side near the periphery of rod 100;
[0046] The glass disc 300 is rotatably connected inside the rod 100, and the glass disc 300 can rotate around the central axis of the rod 100;
[0047] The rod body 100 is provided with a drive part 400 that connects to the glass disk 300. The drive part 400 is used to drive the glass disk 300 to rotate around its own axis.
[0048] When the glass disc 300 facing the channel 101 is contaminated by intra-articular blood or other fluids, obstructing the view of the arthroscope, the glass disc 300 can be rotated by the drive unit 400 to keep the glass disc 300 clear in the arthroscope's field of view.
[0049] Preferably, the rod body 100 has a rotating groove placed coaxially inside, and the glass disc 300 is rotatably connected to the rotating groove.
[0050] The drive unit 400 includes a rotating rod 401 fixedly connected to one end of the glass disk 300. The rotating rod 401 is placed coaxially with the rod body 100, and the rotating rod 401 is rotatably connected to the inside of the rod body 100. The rotating rod 401 extends from the end of the rod body 100 away from the tendon head 200 to the outside of the rod body 100.
[0051] By rotating the lever 401, the glass disc 300 can be rotated, thereby moving the clean area on the glass disc 300 to the channel 101, maintaining a clear arthroscopic view.
[0052] The drive unit 400 also includes an elastic pad 402 fixed to the end of the rod 100 away from the tendon head 200. The elastic pad 402 is annular. The rotating rod 401 passes through the inner side of the elastic pad 402. A pressure plate 403 is fixedly sleeved on the rotating rod 401. The pressure plate 403 is located on the side of the elastic pad 402 away from the rotating rod 401, and the pressure plate 403 is in pressure contact with the elastic pad 402.
[0053] Preferably, the elastic pad 402 can be made of silicone or rubber material;
[0054] By setting the elastic pad 402, the possibility of the lever 401 rotating unexpectedly under non-human operation can be reduced.
[0055] To facilitate the replacement of different types or specifications of tendon harvesting heads 200, the tendon harvesting head 200 is detachably connected to the rod body 100. This application provides two different embodiments of this detachable connection between the tendon harvesting head 200 and the rod body 100 as follows:
[0056] Example 1: The tendon head 200 has a pair of symmetrically placed clamping strips 201 near the end of the rod body 100. A pair of slots adapted to the clamping strips 201 are opened on the periphery of the rod body 100. One end of the rod body 100 is engaged between the two clamping strips 201.
[0057] The clamping strip 201 and the slot cooperate to achieve a detachable connection between the rod body 100 and the tendon extraction head 200.
[0058] Preferably, the clamping strips 201 are detachably connected to the rod body 100 by screws or bolts, which improves the stability of the connection between the tendon head 200 and the rod body 100.
[0059] Example 2: The tendon head 200 has a cylindrical protrusion 202 near the end of the rod 100. The peripheral wall of the protrusion 202 is provided with external threads, and one end of the rod 100 is provided with a matching threaded groove. The tendon head 200 is threadedly connected to the threaded groove on the rod 100 through the protrusion 202, which ensures the stability of the connection between the tendon head 200 and the rod 100, and facilitates the replacement of the type or specification of the tendon head 200.
[0060] The rod body 100 has a scale line 102 on its circumferential wall along its own axis to facilitate determining the depth of the tendon head 200 to be inserted.
[0061] The end of the rotating rod 401 away from the handle 404 is fixedly connected to the handle 404; preferably, the handle 404 has anti-slip texture on its peripheral wall to facilitate turning the handle 404 and driving the rotating rod 401 to rotate.
[0062] A handle 500 is fixedly fitted onto the end of the rod 100 away from the tendon head 200.
[0063] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0064] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims of this utility model.
Claims
1. A minimally invasive tendon harvesting device for quadriceps tendon in knee ligament reconstruction surgery, comprising a rod (100), characterized in that: The tendon-removing head (200) is detachably connected to either end of the rod (100); The rod (100) has a channel (101) for arthroscopic insertion inside. The channel (101) is placed coaxially with the rod (100) and passes through both ends of the rod (100). The rod (100) has a transparent glass disc (300) inside. The glass disc (300) is placed on the same axis as the rod (100), and the glass disc (300) is located at the end of the rod (100) near the tendon head (200). The projection of the channel (101) along its own axis is located on the inner side of the peripheral wall of the glass disc (300). The connection position and shape of the tendon head (200) make the extension direction of the channel (101) open and visible.
2. The minimally invasive quadriceps tendon harvesting device for knee ligament reconstruction according to claim 1, characterized in that, The channel (101) is located on one side near the periphery of the rod (100); The glass disc (300) is rotatably connected inside the rod (100), and the glass disc (300) can rotate around the central axis of the rod (100); The rod (100) is provided with a drive unit (400) that connects to the glass disk (300). The drive unit (400) is used to drive the glass disk (300) to rotate around its own axis.
3. The minimally invasive quadriceps tendon harvesting device for knee ligament reconstruction according to claim 2, characterized in that, The drive unit (400) includes a rotating rod (401) fixedly connected to one end of the glass disc (300). The rotating rod (401) is placed coaxially with the rod body (100), and the rotating rod (401) is rotatably connected to the inside of the rod body (100). The rotating rod (401) extends to the outside of the rod body (100) away from the end of the tendon head (200).
4. The minimally invasive quadriceps tendon harvesting device for knee ligament reconstruction according to claim 3, characterized in that, The drive unit (400) also includes an elastic pad (402) fixed to the end of the rod (100) away from the tendon head (200). The elastic pad (402) is annular. The rotating rod (401) passes through the inner side of the elastic pad (402). A pressure plate (403) is fixedly sleeved on the rotating rod (401). The pressure plate (403) is located on the side of the elastic pad (402) away from the rotating rod (401), and the pressure plate (403) is in pressure contact with the elastic pad (402).
5. The minimally invasive quadriceps tendon harvesting device for knee ligament reconstruction according to claim 1, characterized in that, The tendon head (200) has a pair of symmetrically placed clamping strips (201) near the end of the rod (100). A pair of slots adapted to the clamping strips (201) are opened on the periphery of the rod (100). One end of the rod (100) is engaged between the two clamping strips (201).
6. The minimally invasive quadriceps tendon harvesting device for knee ligament reconstruction according to claim 1, characterized in that, The tendon head (200) near the end of the rod (100) has a cylindrical protrusion (202), the peripheral wall of the protrusion (202) is provided with external threads, and one end of the rod (100) is provided with a matching threaded groove.
7. The minimally invasive quadriceps tendon harvesting device for knee ligament reconstruction according to claim 4, characterized in that, The rod (100) has scale lines (102) on its peripheral wall along its own axis.
8. The minimally invasive quadriceps tendon harvesting device for knee ligament reconstruction according to claim 7, characterized in that, The handle (404) is fixedly connected to the end of the lever (401) away from the handle (404).
9. The minimally invasive quadriceps tendon harvesting device for knee ligament reconstruction according to claim 8, characterized in that, A handle (500) is fixedly fitted onto the end of the rod (100) away from the tendon head (200).