In-vivo tissue loading device

Abstract

The invention provides an in-vivo tissue loading device which can be suitable for various occasions needing to apply continuous and stable traction force to target tissues to expand the tissues, such as shaping of ear and nose parts and repair of diabetic feet, and has the advantages of miniaturization, light weight and simplicity in operation. And meanwhile, the applied pressure can be adjusted from the outside, locking can be conducted through a self-locking mechanism after adjustment, and use is convenient. The device structurally comprises an adjusting mechanism, a pressurizing mechanism and a self-locking mechanism, the adjusting mechanism comprises a rotary knob, a fixing support and a flexible shaft, the pressurizing mechanism comprises a pressurizing pressing rod, and the self-locking mechanism is used for preventing the rotary knob from rotating automatically after the rotary knob rotates; the two ends of the fixing support are rotationally connected with a knob and a pressurizing pressing rod respectively, the flexible shaft is located in the fixing support, the two ends of the flexible shaft are fixedly connected with the knob and the pressurizing pressing rod respectively, the flexible shaft is used for transmitting torque generated by rotation of the knob to the pressurizing pressing rod, and the pressurizing pressing rod is provided with a cam shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical instruments, and in particular to an in-body tissue loading device. Background Art

[0002] In vivo tissue loading techniques, such as lateral bone transfer, can be traced back to the 1970s and were proposed by orthopedic specialist Ilizarov. Through animal experiments, he discovered that bone tissue has excellent regenerative capacity and plasticity, and that bone fragments could be manipulated to achieve bone thickening or changes in bone morphology. Building on this foundation, Ilizarov further invented lateral remodeling techniques for lower limb bones, including lateral bone transfer. However, he did not design or mention the use of lateral bone transfer stents. Later, with the continuous development of lateral bone transfer technology, the development of surgical instruments and stents became crucial. Building on Ilizarov's theory, Chinese doctors designed surgical instruments suitable for clinical lateral bone transfer and also provided the corresponding surgical steps and methods. These instruments include stents for fixing and transferring bone fragments.

[0003] In addition to lateral bone transfer, periosteal stretching technology also applies continuous and stable stretching force to the target tissue, while leveraging the body's own repair capabilities to regenerate new tissue in the target area, improve peripheral blood circulation, and help restore the integrity and function of the defect area. It has certain applications in the treatment of diabetic foot. At the same time, this principle can sometimes be applied to the repair and plastic surgery of the ear and nose. For example, by applying continuous and stable stretching force to these locations, the cartilage, skin and other tissues in these areas can be expanded to repair the defect or extend and enlarge the tissue in the corresponding area. At the same time, with the development of minimally invasive techniques in ear and nose surgery, some tissue structures require directional force-controlled loading or fine adjustment after surgery. Although traditional titanium mesh and screw systems have a fixation effect, they lack external adjustment capabilities and self-locking feedback mechanisms. In addition, the current lateral bone transfer stents are relatively large and the structure is exposed, which is not very convenient for doctors to operate. At the same time, due to the large structure, the patient's movement is also inconvenient, and the slightest mistake may cause the stent to be touched, resulting in more serious consequences. Summary of the Invention

[0004] In response to the problems of existing in vivo tissue loading devices such as large size, inconvenient operation, and lack of external adjustment capabilities and self-locking feedback mechanism, the present invention provides an in vivo tissue loading device, which has the advantages of miniaturization, lightweight and simple operation. At the same time, the applied pressure can be adjusted externally and can be locked by a self-locking mechanism after adjustment, making it easy to use.

[0005] Its technical solution is as follows: an in-vivo tissue loading device, which includes an adjusting mechanism and a pressurizing mechanism, wherein the adjusting mechanism is used to control the pressurizing mechanism to pressurize the target position, and is characterized in that: it also includes a self-locking mechanism, the adjusting mechanism includes a knob, a fixed bracket, and a flexible shaft, the pressurizing mechanism includes a pressurizing rod, and the self-locking mechanism is used to prevent it from automatically rotating after the knob is rotated; the two ends of the fixed bracket are respectively rotatably connected to the knob and the pressurizing rod, the flexible shaft is located in the fixed bracket and its two ends are respectively fixedly connected to the knob and the pressurizing rod, the flexible shaft is used to transmit the torque generated by the rotation of the knob to the pressurizing rod, the pressurizing rod has a cam shaft for applying tension to the tissue during rotation, the cam shaft of the pressurizing rod is located in the tissue, the knob is located outside the tissue, the fixed bracket and the flexible shaft are curved and used to extend from the inside of the tissue to the outside of the tissue.

[0006] Furthermore, the self-locking mechanism includes a spring and a self-locking ball, the end of the knob is provided with a cylindrical connecting section 1, the side wall of the connecting section 1 is provided with a plurality of mounting holes, the mounting hole is provided with the spring, the spring abuts the self-locking ball, the end of the fixed bracket is provided with a connecting section 2, the inner wall of the connecting section 2 is provided with a plurality of arc-shaped grooves, the connecting section 1 extends into the connecting section 2 and the connecting section 1 can rotate relative to the connecting section 2, when the self-locking mechanism is in a locked state, the mounting hole corresponds to the arc-shaped groove and a part of the self-locking ball is located in the arc-shaped groove and the other part is located in the mounting hole, when sufficient force is applied to the knob to make it rotate, the self-locking ball can be pressed into the mounting hole.

[0007] Furthermore, the fixing bracket is provided with a positioning plate for connecting with the tissue via a fixing member.

[0008] Beneficial effects: The device can apply tension to the tissue by turning the pressure rod through a knob, which is easy to use. In addition, the flexible shaft is used for transmission, which simplifies the transmission components and makes the device miniaturized and lightweight. The length of the pressure rod and the size of the middle cam can be customized according to the actual situation of the patient, making the device suitable for various occasions such as diabetic foot, ear and nose repair and plastic surgery, which require the expansion of tissue by applying continuous and stable traction to the target tissue.

[0009] In addition, the locking mechanism can automatically lock the knob after adjustment and provide a retaining force to the pressure plate. The self-locking ball it uses cooperates with the arc-shaped groove on the fixed bracket, which can produce a sense of segmentation when rotating the knob, making it convenient for users to know the rotation range in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the present invention;

[0011] Figure 2 It is a schematic diagram of the explosion structure of the adjustment mechanism and the self-locking structure;

[0012] Figure 3 Schematic diagram of the knob structure;

[0013] Figure 4 is a structural diagram of a fixed bracket;

[0014] Figure 5 It is a structural diagram of the pressurizing mechanism;

[0015] Figure 6 It is a schematic diagram of the working state of the present invention.

[0016] In the figure, 1. knob; 2. spring; 3. self-locking ball; 4. flexible shaft; 5. fixing bracket; 6. positioning plate; 7. pressure rod 7; 8. mounting hole; 9. connecting section 1; 10. arc-shaped groove; 11. connecting section 2; 12. scanning circular hole; 13. bone screw hole; 14. circular shaft; 15. cam shaft. DETAILED DESCRIPTION

[0017] like Figure 1 、 Figure 2 、 Figure 5 The in-vivo tissue loading device shown in the figure includes an adjustment mechanism, a pressurizing mechanism, and a self-locking mechanism. The adjustment mechanism is used to control the pressurizing mechanism to pressurize the target position. The adjustment mechanism includes a knob 1, a fixed bracket 5, and a flexible shaft 4. The above-mentioned components of the adjustment mechanism can be symmetrically arranged at both ends of the pressurizing mechanism. The pressurizing mechanism includes a pressurizing rod 7. The self-locking mechanism includes a spring 2 and a self-locking ball 3. The self-locking mechanism is used to prevent the knob 1 from automatically rotating after it is rotated; the two ends of the fixed bracket 5 are respectively rotatably connected to the knob 1 and the pressurizing rod 7, the flexible shaft 4 is located in the scanning-shaped circular hole 12 of the fixed bracket 5, and its two ends are respectively fixedly connected to the knob 1 and the circular shaft 14 at the end of the pressurizing rod 7. The flexible shaft 4 can be a flexible tubular part made of medical stainless steel, titanium alloy, or nickel-titanium alloy. The power of this device comes from the knobs 1 on both sides. The flexible shaft 4 is used to transmit the torque generated by rotating the knob 1 to the pressurizing rod 7. The pressurizing rod 7 has a cam shaft 15 for applying tension to the tissue during rotation. The cam shaft 15 of the pressurizing rod 7 is located inside the tissue, and the knob 1 is located outside the tissue. The fixed bracket 5 and the flexible shaft 4 are curved and are used to extend from inside the tissue to outside the tissue for ease of use by the user. The cam shaft 15 in the figure is preferably used for periosteum expansion. In actual use, the cam shaft 15 can be customized in shape, length, and size according to the patient's condition and the site of use.

[0018] The device as a whole is a C-shaped rod-like piece. The user can operate the device by turning the knob 1 located outside the body. The flexible shaft 4 can transmit the torque of the knob 1 and drive the pressure rod 7 to rotate, thereby rotating its cam shaft 15 to apply continuous and stable traction to the target tissue to expand the tissue. In addition to transmitting torque, the flexible shaft 4 can also bend with the fixed bracket 5, thereby extending outside the body to connect with the knob. Compared with existing devices, the overall structure of this solution is simpler. In addition, the components in this solution that are in direct contact with human tissue can be made of medical degradable materials, such as polyurethane, polylactic acid (PLA), polyglycolic acid (PGA), etc. Among them, polylactic acid can be decomposed into water and carbon dioxide under specific conditions, and can be easily metabolized by the human body, avoiding subsequent secondary surgery to cause secondary trauma to the patient.

[0019] Combine Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the specific structure of the self-locking mechanism is as follows: a cylindrical connecting section 1 9 is provided at the end of the knob 1, a plurality of mounting holes 8 (4 in the figure) are opened on the side wall of the connecting section 1 9, a spring 2 is provided in the mounting hole 8, the spring 2 abuts against the self-locking ball 3, a connecting section 2 11 is provided at the end of the fixing bracket 5, and a plurality of arc-shaped grooves 10 extending axially are distributed on the inner wall of the connecting section 11 along the circumferential direction ( Figure 4 There are 4 of them), a transition plane is provided between adjacent arc-shaped grooves 10, connecting section 19 extends into connecting section 2 11 and connecting section 19 can rotate relative to connecting section 2 11, when the self-locking mechanism is in a locked state, the mounting hole 8 corresponds to the arc-shaped groove 10 and the spring 2 can press the self-locking ball 3 so that one part of it is located in the arc-shaped groove 10 and the other part is located in the mounting hole 8, thereby preventing the knob 1 from rotating relative to the fixed bracket 5, when sufficient force is applied to the knob 1 to rotate it, the arc-shaped groove 10 can press the self-locking ball 3 into the mounting hole 8, thereby releasing the lock, when the next arc-shaped groove 10 corresponds to the position of the self-locking ball 3, the self-locking ball 3 can pop out to produce a sense of paragraph, which is convenient for the user to know the rotation amplitude in real time. This is also the advantage of this device compared to directly using threads to connect the knob 1 and the fixed bracket 5 to achieve self-locking.

[0020] Working principle: Taking the treatment of diabetic foot as an example, the device is fixed on the bone through the positioning plate 6 provided on the fixing bracket 5, and is specifically connected to the bone through the bone screw holes 13 on the positioning plate 6. When the device is installed on the patient's bone, the working state of the device is divided into two types. One is the process of pressurizing the patient's moved bone fragments, and the other is the state of decompression and relaxation, that is, the state in which the moved bone fragments are not under pressure. When the device pressurizes the patient's bone fragments, the cam shaft 15 of the pressurizing rod 7 on the device is as follows. Figure 6As shown in the vertical state, when the device is in the relaxed state, the pressure rod 7 is Figure 6 The position shown is rotated 90 degrees clockwise or counterclockwise, that is, the camshaft 15 on the pressure lever 7 is in a flat state.

[0021] When pressure is needed, the operator turns the two knobs 1 in opposite directions from the outside at the same time. At this time, due to the action of the external force, the self-locking ball 3 inside the knob is forced to be pushed toward the center of the circle by the arc-shaped groove 10 inside the fixed bracket 5. At this time, the external power will also be transmitted to the pressure rod 7 by the flexible shaft 4, and the pressure rod 7 rotates under the action of the external force. When the knob 1 is rotated to the specified position from the outside, the self-locking ball 3 is pushed into the next groove inside the fixed bracket 5 under the action of the spring force. At this time, the operator will receive a segmented feedback from the knob 1, and the pressure operation is completed. Because the self-locking ball 3 is tightly pressed in the groove of the fixed bracket 5 under the action of the spring force, if there is no certain external force applied under the action of this force, the pressure rod 7 at the end will be in a locked state.

[0022] When decompression is needed, the operator simply turns the knob 1 90 degrees in the opposite direction of the pressurization process to complete the decompression operation. As with pressurization, after the decompression operation is completed, the pressurization rod 7 is locked by the internal structure of the knob 1. During the treatment process, repeated pressurization and decompression operations are required to move bone fragments and promote tissue and blood vessel proliferation and regeneration.

[0023] The above is the application of the device based on the lateral bone transfer technology, and it can also be used for periosteal stretching technology, that is, the pressure rod 7 is buried in the periosteum, and the periosteum and attached related tissues are expanded outward by the rotation of the cam shaft 15, so that the periosteum can be expanded when treating diabetic foot. In addition, in some cases, the skin or cartilage can also be expanded when repairing and reshaping the ear and nose. It is only necessary to adaptively adjust the size and shape of the device according to the specific use site, and it has a wide range of uses.

[0024] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by anyone familiar with the art within the technical scope disclosed by the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An in vivo tissue loading device, comprising an adjusting mechanism and a pressurizing mechanism, wherein the adjusting mechanism is used to control the pressurizing mechanism to pressurize a target location, characterized in that: It also includes a self-locking mechanism, the adjusting mechanism includes a knob, a fixed bracket, and a flexible shaft, the pressurizing mechanism includes a pressurizing rod, and the self-locking mechanism is used to prevent the knob from automatically rotating after the knob is rotated; the two ends of the fixed bracket are respectively rotatably connected to the knob and the pressurizing rod, the flexible shaft is located in the fixed bracket and its two ends are respectively fixedly connected to the knob and the pressurizing rod, the flexible shaft is used to transmit the torque generated by the rotation of the knob to the pressurizing rod, the pressurizing rod has a cam shaft for applying tension to the tissue during rotation, the cam shaft of the pressurizing rod is located in the tissue, the knob is located outside the tissue, the fixed bracket and the flexible shaft are curved and used to extend from inside the tissue to outside the tissue.

2. The in-vivo tissue loading device according to claim 1, characterized in that: The self-locking mechanism includes a spring and a self-locking ball. The end of the knob is provided with a cylindrical connecting section 1, and the side wall of the connecting section 1 is provided with a plurality of mounting holes. The spring is provided in the mounting hole, and the spring abuts the self-locking ball. The end of the fixed bracket is provided with a connecting section 2, and the inner wall of the connecting section 2 is provided with a plurality of arc-shaped grooves. The connecting section 1 extends into the connecting section 2 and the connecting section 1 can rotate relative to the connecting section 2. When the self-locking mechanism is in a locked state, the mounting hole corresponds to the arc-shaped groove and a part of the self-locking ball is located in the arc-shaped groove and the other part is located in the mounting hole. When sufficient force is applied to the knob to rotate it, the self-locking ball can be pressed into the mounting hole.

3. The in-vivo tissue loading device according to claim 1 or 2, characterized in that: The fixing bracket is also provided with a positioning plate for connecting with the tissue via a fixing piece.

Images