Surgical tissue spreader

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, disclose a kind of tissue dilator for operation. It is mainly composed of dilating mechanism and locking mechanism, and dilating mechanism contains two mutually hinged dilating members, and the dilating and folding of tissue can be realized. In the locking mechanism, the first and second hinged members are respectively hinged with the driving end of the dilating member, the adjusting rod is rotatably connected with the first hinged member and screw-connected with the second hinged member, and is driven by the electric rotary drive assembly. The dilator discards the traditional manual operation, accurately controls the rotating speed by the electric rotary drive assembly, avoids shaking, greatly reduces the risk of tissue damage, significantly improves the safety and accuracy of operation, can accurately control the dilating amplitude, helps the standardization and refinement of operation. In addition, the transmission connecting piece is combined with a flexible transmission rod by a connecting sleeve, the component connection is ingenious, easy to assemble, disassemble and maintain, and the structure is compact, suitable for limited operation space.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a surgical tissue retractor. Background Technology

[0002] In neurosurgery, adequate exposure of deep lesions (such as tumors and vascular malformations) is crucial for surgical success, and opening up the brain tissue is a core step in achieving this goal. Brain tissue is soft and richly blood-supplied; excessive traction or displacement during surgery can easily lead to serious risks such as nerve damage, cerebral edema, and hemorrhage, posing a significant threat to the patient's postoperative recovery and life.

[0003] Traditional tissue retractors mostly employ manual mechanical structures. The common operation involves medical staff manually turning a handle to drive a screw, which in turn unfolds the two retractor arms to open the tissue. While this traditional retractor can achieve its function to a certain extent, it has several significant limitations. Firstly, manual operation relies entirely on human power, which presents considerable difficulty in continuous rotation. Pauses are inevitable during adjustments, leading to significant wobbling of the retractor. In highly precise procedures like neurosurgery, this wobbling can increase the risk of tissue tearing or displacement, severely impacting surgical safety and outcome. Secondly, manual operation makes it difficult to guarantee consistent precision and stability in each adjustment. Differences in operating habits and force applied by different medical staff can also result in inconsistent retraction effects, hindering the standardization and refinement of surgical procedures. Therefore, developing a novel surgical tissue retractor that overcomes the shortcomings of traditional manual retractors is of significant practical importance.

[0004] The methods described in this section are not necessarily methods that had been previously conceived or adopted. Unless otherwise specified, no method described in this section should be assumed to be prior art simply because it is included in this section. Similarly, unless otherwise specified, the issues mentioned in this section should not be considered to be accepted in any prior art. Utility Model Content

[0005] The purpose of this invention is to provide a surgical tissue retractor to solve the problems of traditional manual retractors, such as reliance on human labor, easy shaking, and difficulty in ensuring operational accuracy, thereby improving the safety and precision of tissue retraction in neurosurgery.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A surgical tissue retractor includes a retracting mechanism and a locking mechanism. The retracting mechanism includes two retracting members that are hinged to each other. The locking mechanism includes a first hinge, a second hinge, an adjusting rod, and an electric rotary drive assembly. The first hinge and the second hinge are respectively hinged to the driving ends of the two retracting members. The adjusting rod is rotatably connected to the first hinge and threadedly connected to the second hinge. The electric rotary drive assembly is drively connected to the adjusting rod to drive the adjusting rod to rotate.

[0008] Furthermore, the electric rotary drive assembly includes an electric actuator and a transmission connector, with both ends of the transmission connector connected to the electric actuator and the adjusting rod, respectively.

[0009] Furthermore, the transmission connector includes a connecting sleeve and a flexible transmission rod. One end of the connecting sleeve is fixedly connected to the electric actuator, and the other end is detachably fixedly connected to the first hinge. One end of the flexible transmission rod is drivenly connected to the output end of the electric actuator, and the other end is detachably drivenly connected to the adjusting rod.

[0010] Furthermore, the first hinge member has a first threaded connecting sleeve coaxially arranged with the adjusting rod on the side away from the second hinge member, and the connecting sleeve has a second threaded connecting sleeve for threaded connection with the first threaded connecting sleeve on the end away from the electric actuator.

[0011] Furthermore, the end of the adjusting rod away from the second hinge has a splined mating cylinder that extends into the first threaded connecting cylinder, and the end of the flexible transmission rod away from the electric actuator has a splined shaft for insertion into the splined mating cylinder.

[0012] Furthermore, the second threaded connecting cylinder is threadedly connected to the inner thread of the first threaded connecting cylinder via the outer external thread.

[0013] Furthermore, the outer side of the second threaded connecting sleeve near the end of the connecting sleeve has a radially extending anti-slip screw.

[0014] Furthermore, both the first hinge member and the second hinge member are fixedly connected to a hinge shaft that passes through the corresponding expansion member, and a limit member is connected to the end of the hinge shaft.

[0015] Furthermore, the limiting member is threadedly connected to the hinge shaft.

[0016] Furthermore, both the first hinge and the second hinge are hinged to the same side of the two spreading members.

[0017] This surgical tissue retractor offers several significant advantages. Regarding surgical safety, the electric rotary drive component replaces traditional manual operation, eliminating the pauses and shaking inherent in manual operation, reducing the risk of tissue tearing or displacement, and greatly improving surgical stability. In terms of operational precision, the electric rotary drive component allows for precise speed control and precise control of the adjusting rod's rotation, thereby achieving accurate control over the retractor's opening range, facilitating standardized and refined surgical procedures. For assembly and maintenance, the transmission connector utilizes a combination of a connecting sleeve and a flexible transmission rod. The connecting sleeve is threaded to the first hinge and features an anti-slip screw. The flexible transmission rod and adjusting rod are splined for easy assembly and disassembly. Simultaneously, the limiting component at the hinge shaft end is threaded to the hinge shaft, facilitating component replacement and cleaning. Furthermore, both the first and second hinges are hinged to the same side of the retractor, resulting in a compact retractor structure that is easier for medical personnel to operate in limited surgical spaces. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the surgical tissue retractor of this utility model;

[0020] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0021] Figure 3 This is a schematic diagram of the structure of the tissue retractor in one embodiment of the surgical tissue retractor of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the electric rotary drive assembly in one embodiment of the surgical tissue retractor of this utility model;

[0023] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0024] Figure 6 This is a schematic diagram showing the connection between the first hinge, the second hinge, and the adjusting rod in one embodiment of the surgical tissue retractor of this utility model.

[0025] The meanings of the labels in the attached diagram are as follows:

[0026] The components include: a spreading mechanism 1, a spreading member 11, a driving end 11a, a hinge shaft 111, a limiting member 112, a locking mechanism 2, a first hinge member 21, a first threaded connecting cylinder 211, a splined connecting cylinder 212, a second hinge member 22, an adjusting rod 23, an electric rotary drive assembly 24, an electric actuator 241, a transmission connecting member 242, a connecting sleeve 2421, a second threaded connecting cylinder 2422, an anti-slip screw member 2423, a flexible transmission rod 243, and a splined shaft 2431. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] Reference Figures 1-6 As shown, the surgical tissue retractor of this embodiment includes a retracting mechanism 1 and a locking mechanism 2.

[0029] The spreading mechanism 1 includes two spreading members 11 that are hinged to each other. This hinged structure allows the two spreading members 11 to rotate relative to each other, thereby realizing the spreading and closing actions of the tissue.

[0030] The locking mechanism 2 includes a first hinge 21, a second hinge 22, an adjusting rod 23, and an electric rotary drive assembly 24. The first hinge 21 and the second hinge 22 are respectively hinged to the driving ends 11a of the two spreading members 11. The adjusting rod 23 is rotatably connected to the first hinge 21 and threadedly connected to the second hinge 22. The electric rotary drive assembly 24 is drively connected to the adjusting rod 23 to drive its rotation. When the electric rotary drive assembly 24 is activated, it drives the adjusting rod 23 to rotate. Since the adjusting rod 23 is threadedly connected to the second hinge 22, during the rotation of the adjusting rod 23, the second hinge 22 moves along the axial direction of the adjusting rod 23. Because the first hinge 21 and the second hinge 22 are respectively hinged to the driving ends 11a of the two spreading members 11, the movement of the second hinge 22 will cause the two spreading members 11 to rotate around their hinge points, thereby achieving the opening or closing adjustment of the tissue.

[0031] During the surgery, the rotation of the adjusting rod 23 is adjusted by controlling the start, stop, and speed of the electric rotary drive assembly 24, according to the surgical needs. For example, when it is necessary to expand the tissue, the electric rotary drive assembly 24 is activated, causing it to rotate the adjusting rod 23 in the forward direction. The rotation of the adjusting rod 23 causes the second hinge member 22 to move along the axial direction of the adjusting rod 23, thereby pushing the two expanding members 11 to unfold around the hinge point, thus expanding the tissue. When it is necessary to adjust the expansion range, the rotation amount of the adjusting rod 23 can be precisely controlled by adjusting the speed of the electric rotary drive assembly 24, thereby precisely controlling the expansion range of the expanding members 11.

[0032] By setting up an electric rotary drive component 24 to drive the adjustment rod 23 to rotate, the traditional manual operation method is replaced. This avoids the problem of continuous rotation that is difficult to achieve by manual operation and the shaking caused by the pause in the action during adjustment. It greatly improves the stability during the tissue expansion process, effectively reduces the risk of tissue tearing or displacement, and improves the safety of the operation.

[0033] The electric rotary drive assembly 24 can achieve precise speed control, thereby enabling precise adjustment of the rotation angle and speed of the adjusting rod 23, and thus achieving precise control of the opening amplitude of the stretching member 11, improving the accuracy of tissue stretching, and facilitating standardized and refined surgical operations.

[0034] In this embodiment, the electric rotary drive assembly 24 includes an electric actuator 241 and a transmission connector 242. The two ends of the transmission connector 242 are connected to the electric actuator 241 and the adjusting rod 23, respectively. The electric actuator 241 serves as a power source, transmitting power to the adjusting rod 23 through the transmission connector 242 to drive its rotation, thereby achieving precise control over the opening and closing actions of the spreader.

[0035] The transmission connector 242 specifically includes a connecting sleeve 2421 and a flexible transmission rod 243. One end of the connecting sleeve 2421 is fixedly connected to the electric actuator 241, and the other end is detachably fixedly connected to the first hinge 21. This detachable connection facilitates the assembly and disassembly of the retractor before and after surgery, and is convenient for cleaning and maintenance. One end of the flexible transmission rod 243 is drivenly connected to the output end of the electric actuator 241, and the other end is detachably drivenly connected to the adjusting rod 23. Its flexibility can adapt to the fine adjustment of the device position during surgery to a certain extent, and the detachable design facilitates the replacement of parts in different scenarios.

[0036] The first hinge member 21 has a first threaded connecting sleeve 211 coaxially arranged with the adjusting rod 23 on the side away from the second hinge member 22. The connecting sleeve 2421 has a second threaded connecting sleeve 2422 for threaded connection with the first threaded connecting sleeve 211 at the end away from the electric actuator 241. With this threaded connection method, the connecting sleeve 2421 can be easily and quickly fixed together with the first hinge member 21 during assembly, and the threaded connection has good stability, which can effectively ensure the connection strength between components during power transmission.

[0037] The adjusting rod 23 has a splined mating cylinder 212 extending into the first threaded connecting cylinder 211 at the end away from the second hinge member 22. The flexible transmission rod 243 has a splined shaft 2431 for interlocking with the splined mating cylinder 212 at the end away from the electric actuator 241. The splined connection enables efficient torque transmission, ensuring stable power transmission from the electric actuator 241 to the adjusting rod 23. Simultaneously, the splined interlocking design facilitates the separation of the flexible transmission rod 243 from the adjusting rod 23 when needed, simplifying equipment maintenance and component replacement.

[0038] The second threaded connecting sleeve 2422 is threadedly connected to the inner thread of the first threaded connecting sleeve 211 through the outer external thread. This reliable threaded connection method ensures connection strength while being simple to operate, allowing medical staff to easily complete assembly and disassembly operations.

[0039] The second threaded connecting sleeve 2422 has a radially extending anti-slip screw 2423 on the outer side near the connecting sleeve 2421. When performing threaded connection or disassembly operations between the connecting sleeve 2421 and the first hinge 21, medical staff can hold the anti-slip screw 2423 to increase friction during operation, avoid difficulties caused by hand slippage, and make the assembly and disassembly process more convenient and efficient.

[0040] Both the first hinge member 21 and the second hinge member 22 are fixedly connected to a hinge shaft 111 that passes through the corresponding expansion member 11. This structural design makes the connection between the first hinge member 21 and the second hinge member 22 and the expansion member 11 more stable, and can effectively withstand the force generated by the expansion member 11 when it expands the tissue during the operation of the expander.

[0041] A limiting member 112 is connected to the end of the hinge shaft 111. The function of the limiting member 112 is to prevent the expansion member 11 from axially moving on the hinge shaft 111, ensuring the stability of the expansion member 11's rotation around the hinge shaft 111. Furthermore, the limiting member 112 is threadedly connected to the hinge shaft 111. This connection method facilitates installation and disassembly operations during assembly and maintenance. Medical personnel can rotate the limiting member 112 to secure it to the end of the hinge shaft 111, ensuring the limiting effect; when it is necessary to replace or clean the expander, the limiting member 112 can also be easily unscrewed to separate the components.

[0042] The first hinge 21 and the second hinge 22 are both hinged to the same side of the two spreading members 11. This layout makes the spreader more compact in structure and occupies less space, making it easier for medical staff to operate in situations where surgical space is limited.

[0043] In summary, this utility model discloses a surgical tissue retractor that, with its optimized design in multiple aspects, brings significant changes to neurosurgery. Its precise control, achieved through the electrically driven rotary drive component 24, greatly improves the stability and accuracy of surgical procedures, reducing surgical risks. In practical use, medical personnel can quickly assemble and disassemble the device, and with the help of thoughtful designs such as the anti-slip screws 2423, maintenance and component replacement are easily handled. The compact structural layout allows the retractor to maneuver effectively within limited surgical spaces. With the widespread application of this product, it is expected to become a standard configuration in neurosurgery, facilitating the successful execution of more complex surgeries and bringing better treatment outcomes to patients.

[0044] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A surgical tissue retractor, characterized in that: The device includes a spreading mechanism and a locking mechanism. The spreading mechanism includes two mutually hinged spreading members. The locking mechanism includes a first hinge member, a second hinge member, an adjusting rod, and an electric rotary drive assembly. The first hinge member and the second hinge member are respectively hinged to the driving ends of the two spreading members. The adjusting rod is rotatably connected to the first hinge member and threadedly connected to the second hinge member. The electric rotary drive assembly is drively connected to the adjusting rod to drive the adjusting rod to rotate.

2. The surgical tissue retractor according to claim 1, characterized in that: The electric rotary drive assembly includes an electric actuator and a transmission connector, with both ends of the transmission connector connected to the electric actuator and the adjusting rod, respectively.

3. The surgical tissue retractor according to claim 2, characterized in that: The transmission connector includes a connecting sleeve and a flexible transmission rod. One end of the connecting sleeve is fixedly connected to the electric actuator, and the other end is detachably fixedly connected to the first hinge. One end of the flexible transmission rod is drivenly connected to the output end of the electric actuator, and the other end is detachably drivenly connected to the adjusting rod.

4. The surgical tissue retractor according to claim 3, characterized in that: The first hinge member has a first threaded connecting sleeve coaxially arranged with the adjusting rod on the side away from the second hinge member, and the connecting sleeve has a second threaded connecting sleeve for threaded connection with the first threaded connecting sleeve on the end away from the electric actuator.

5. The surgical tissue retractor according to claim 4, characterized in that: The adjusting rod has a splined coupling sleeve extending into the first threaded connecting sleeve at the end away from the second hinge member, and the flexible transmission rod has a splined shaft for insertion into the splined coupling sleeve at the end away from the electric actuator.

6. The surgical tissue retractor according to claim 4, characterized in that: The second threaded connecting cylinder is threadedly connected to the inner thread of the first threaded connecting cylinder through the external thread on the outer side.

7. The surgical tissue retractor according to claim 4, characterized in that: The second threaded connecting sleeve has a radially extending anti-slip screw on its outer side near the connecting sleeve.

8. The surgical tissue retractor according to claim 1, characterized in that: Both the first hinge member and the second hinge member are fixedly connected to a hinge shaft that passes through the corresponding expansion member, and a limit member is connected to the end of the hinge shaft.

9. The surgical tissue retractor according to claim 8, characterized in that: The limiting member is threadedly connected to the hinge shaft.

10. The surgical tissue retractor according to claim 1, characterized in that: Both the first hinge and the second hinge are hinged to the same side of the two spreading members.

Images