Expansion device for cervical cancer radiotherapy patient
The cervical cancer radiotherapy expansion device, designed with a telescopic mechanism and screw drive, solves the problem that traditional devices cannot adapt to the physiological structures of different patients, achieves precise control of the expansion range, improves treatment safety and personalization, and reduces the failure rate.
Patent Information
- Application Number
- CN202520377513.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-03-06
AI Technical Summary
Traditional cervical cancer radiotherapy dilation devices have a fixed rod length, which cannot adapt to the differences in the physiological structure of different patients, leading to deviations in dilation position or the risk of over-insertion. Furthermore, it is difficult to precisely control the dilation amplitude, which may cause tissue damage.
The design employs a telescopic mechanism and screw drive, which allows for precise control of the expansion amplitude by adjusting the length of the expansion head and extension head, combined with the high-precision linear motion of the screw, thus adapting to the physiological characteristics of different patients.
This improves the safety and personalization of treatment, reduces the mechanical failure rate, ensures that the dilation effect meets the treatment expectations, and avoids harm to patients caused by over- or under-dilation.
Smart Images
Figure CN223615256U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cervical cancer treatment technology, and in particular to an expansion device for cervical cancer radiotherapy patients. Background Technology
[0002] The dilation device used for cervical cancer radiotherapy patients is an important instrument in radiotherapy adjuvant therapy. Its main function is to maintain the patency of the vagina or rectum through mechanical dilation, and to prevent tissue fibrosis and stenosis after radiotherapy. Traditional dilation devices usually adopt a fixed structure design, and their rod length and dilation method are relatively simple, making it difficult to meet the personalized needs of different patients. In the existing technology, the core structure of the dilation device usually includes:
[0003] 1. Main body: Used for insertion into the body cavity and providing support, mostly made of medical-grade plastic or silicone;
[0004] 2. Expanding head: The expansion function is achieved through a mechanical structure (such as a spring or airbag);
[0005] 3. Control handle: For medical staff to operate manually or connect to the drive device.
[0006] Currently, to improve the expansion effect, some devices employ technologies such as electric drive or airbag expansion. For example, electric expanders control the expansion speed through a motor, while airbag expanders achieve uniform expansion through inflation pressure.
[0007] However, these implementation methods still have the following problems: the fixed-length rod cannot match the physiological differences of different patients, which may lead to deviation in expansion position or over-insertion risk; traditional spring or airbag structures rely on elastic deformation, which makes it difficult to accurately control the expansion amplitude and is prone to tissue damage due to pressure fluctuations. To address this, an expansion device with a telescopic structure and a rotating screw drive is proposed. The telescopic mechanism dynamically adjusts the rod length to adapt to the characteristics of different patients. Combined with the high-precision linear motion of the screw drive, precise control of the expansion amplitude is achieved. This design improves the safety and personalization of treatment while simplifying the operation process, reducing the mechanical failure rate, and providing a more reliable auxiliary solution for cervical cancer radiotherapy. Utility Model Content
[0008] To address the shortcomings of existing technologies, this invention provides an expansion device for cervical cancer radiotherapy patients. It solves the problems that fixed-length rods cannot match the physiological differences of different patients, which may lead to deviations in expansion position or the risk of over-insertion. Traditional spring or airbag structures rely on elastic deformation, making it difficult to accurately control the expansion amplitude and easily causing tissue damage due to pressure fluctuations.
[0009] To achieve the above objectives, this utility model provides the following technical solution:
[0010] An expansion device for cervical cancer radiotherapy patients includes two expansion heads. Each expansion head has an extension head movably engaged on its right surface. A main rod is located on the right side of each extension head. Two screw rods are movably sleeved within the main rod. A screw rod is located on the right side of the main rod. A nut for limiting the position is threaded onto the annular side of the lower screw rod. A slider is fixedly connected to the surface of the lower extension head. A connecting block is fixedly connected to the right surface of the slider. Locking blocks are fixedly connected to the opposing surfaces of the two expansion heads, and each locking block is fixedly connected to one of the two screw rods.
[0011] Preferably, a limiting rod is fixedly connected to the annular side of the upper screw of the two screws, and the limiting rod is movably sleeved with the lower screw of the two screws. Two fixing blocks are fixedly connected to the right surface of the main rod, and both fixing blocks are rotatably connected to the screw. A roller is fixedly connected to the lower surface of the screw.
[0012] Preferably, the connecting block is threadedly connected to the screw, and a limiting groove is formed through the left surface of the main rod, the limiting groove being movably connected to the slider.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] 1. By moving the two nuts, the limit between the expansion head and the extension head can be opened. At this time, the length of the expansion head and the extension head can be adjusted to better adapt to the physiological characteristics of different patients. After adjustment, the limit is fixed by rotating the two nuts. During the movement of the two screws, the limit rod ensures the accuracy of their movement. The entire system can ensure that the expansion operation can accurately reach the required position through the telescopic mechanism, achieving effective expansion and improving the treatment effect.
[0015] 2. During the movement of the connecting block, the slider and the extension head fixed on the slider will move together. When the screw is rotated, its pitch is fixed and precise. The advancing or retracting distance of the screw can be precisely calculated with each rotation. This allows the expansion degree of the screw expansion head to be controlled very precisely. Doctors can adjust the expansion range precisely according to the patient's specific condition and treatment needs to ensure that the expansion effect meets the treatment expectations and avoid over- or under-expansion that may cause harm to the patient. Attached Figure Description
[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.
[0017] Figure 1This is an overall structural diagram of the present invention;
[0018] Figure 2 This is an exploded view of the overall structure of this utility model;
[0019] Figure 3 This is a structural diagram of the extension head of this utility model;
[0020] Figure 4 This is a structural diagram of the main rod of this utility model.
[0021] Legend: 1. Expansion head; 2. Extension head; 3. Main rod; 4. Slider; 5. Screw 1; 6. Screw 2; 7. Limiting rod; 8. Nut; 9. Locking block; 10. Connecting block; 11. Roller; 12. Fixing block; 13. Limiting groove. Detailed Implementation
[0022] This application provides an expansion device for cervical cancer radiotherapy patients. It effectively solves the problems of fixed-length rods failing to match the physiological differences of different patients, potentially leading to expansion position deviations or over-insertion risks. Traditional spring or airbag structures rely on elastic deformation, making precise control of the expansion amplitude difficult and prone to tissue damage due to pressure fluctuations. By dynamically adjusting the rod length through a telescopic mechanism to adapt to the characteristics of different patients, combined with the high-precision linear motion of a screw drive, precise control of the expansion amplitude is achieved. This design improves treatment safety and personalization while simplifying the operation process, reducing mechanical failure rates, and providing a more reliable auxiliary solution for cervical cancer radiotherapy.
[0023] Example
[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in this application effectively solves the problems that fixed-length rods cannot match the physiological differences of different patients, which may lead to deviation in expansion position or over-insertion risk; and that traditional spring or airbag structures rely on elastic deformation, making it difficult to accurately control the expansion amplitude and easily causing tissue damage due to pressure fluctuations. The overall idea is as follows:
[0025] To address the problems existing in the prior art, this utility model provides an expansion device for cervical cancer radiotherapy patients, comprising two expansion heads 1, each with an extension head 2 movably engaged on its right surface. A main rod 3 is located on the right side of each extension head 2, and two screw rods 6 are movably sleeved within the main rod 3. A screw rod 5 is located on the right side of the main rod 3. A nut 8 for limiting the position is threaded onto the annular side of the lower screw rod 6. A slider 4 is fixedly connected to the surface of the lower extension head 2, and a connecting block 10 is fixedly connected to the right surface of the slider 4. The opposing surfaces of the two expansion heads 1 are fixedly... The device is equipped with two locking blocks 9, which are fixedly connected to two screw rods 6 respectively. During use, the two expansion heads 1 are opened to their maximum distance. By turning the two nuts 8, the limit between the expansion head 1 and the extension head 2 is opened. At this time, the length of the expansion head 1 and the extension head 2 can be adjusted to better adapt to the physiological characteristics of different patients. After adjustment, the two nuts 8 are rotated to fix the limit. During the movement of the two screw rods 6, the accuracy of their movement is ensured by the limit rod 7. The entire device, through the telescopic mechanism, can ensure that the expansion operation can accurately reach the required position, achieve effective expansion, and improve the treatment effect.
[0026] A limiting rod 7 is fixedly connected to the annular side of the upper screw 6 of the two screws 2 6. The limiting rod 7 is movably sleeved with the lower screw 6 of the two screws 2 6. Two fixing blocks 12 are fixedly connected to the right surface of the main rod 3. Both fixing blocks 12 are rotatably connected to the screw 1 5. A roller 11 is fixedly connected to the lower surface of the screw 1 5. A connecting block 10 is threadedly sleeved with the screw 1 5. A limiting groove 13 is formed through the left surface of the main rod 3. The limiting groove 13 is movably connected to the slider 4. During expansion, the fixed screw 1 5 is rotated by rotating the roller 11. During the movement, the connecting block 10 sleeved on it moves due to the action of the thread. As the connecting block 10 moves, it will drive the slider 4 and the extension head 2 fixed on the slider 4 to move together. When the screw 5 is rotated, its pitch is fixed and precise. The advance or retreat distance of the screw 5 for each rotation can be precisely calculated. This allows the expansion degree of the screw expansion head 1 to be controlled very precisely. Doctors can precisely adjust the expansion range according to the patient's specific condition and treatment needs to ensure that the expansion effect meets the treatment expectations and avoid over- or under-expansion that may cause harm to the patient.
[0027] Among them, the expansion head 1 is a component that directly acts on the patient's body cavity to perform expansion operations. By adjusting the combined length with the extension head 2, it can be adapted to the physiological structure of different patients to complete the expansion treatment.
[0028] Extension head 2: It can be movably connected to the dilator head 1, and the overall length can be adjusted to better adapt to the physiological characteristics of different patients and improve the applicability of the dilation device.
[0029] Main rod 3: As a supporting structure, it is internally fitted with screw 6 and connected to screw 5 on the right side, providing installation positions for each component and ensuring the overall stability and functionality of the device;
[0030] Slider 4: Fixed on the surface of the lower extension head 2, cooperating with the limiting groove 13 to guide the extension head 2 to move, while fixing the connecting block 10 to transmit power to drive the extension head 2 to move;
[0031] Screw 5: It achieves precise linear motion by rotating, driving the connecting block 10 to move, thereby controlling the expansion range of the extension head 2 and the expansion head 1, and ensuring that the expansion operation is carried out accurately;
[0032] Screw 2 6: Connected to the locking block 9, it drives the expansion head 1 to move. Under the action of the nut 8, it achieves a limit. During the movement, the limit rod 7 ensures accuracy and controls the position of the expansion head 1.
[0033] Limiting rod 7: It is sleeved between the two screws 6 to ensure the accuracy of the movement of the two screws 6, so that the expansion head 1 remains stable when moving and improves the accuracy of the expansion operation;
[0034] Nut 8: It is threaded onto the lower screw 6. Moving it can open or close the limit between the expansion head 1 and the extension head 2, so as to adjust and fix the length of the expansion head 1 and the extension head 2.
[0035] Block 9: It is fixed on the opposite side of the two expansion heads 1 and connected to the screw 6. It transmits the movement of the screw 6 to the expansion head 1 to realize the movement and expansion action of the expansion head 1.
[0036] Connecting block 10: It is threadedly connected to screw 5 and also connected to slider 4, which converts the rotation of screw 5 into linear motion, driving extension head 2 and expansion head 1 to perform expansion operation;
[0037] Roller 11: Fixed to the lower surface of screw 5. Rotating roller 11 drives screw 5 to rotate, providing an operating force point for the rotation of screw 5, making it convenient for medical staff to control the expansion.
[0038] Fixed block 12: Fixed to the right surface of the main rod 3, rotatably connected to the screw 5, supporting the screw 5 and keeping it stable during rotation, ensuring smooth expansion operation;
[0039] Limiting groove 13: It is formed on the left surface of the main rod 3 and is movably connected to the slider 4 to limit the movement direction of the slider 4 and ensure that the extension head 2 and the expansion head 1 move along the predetermined direction.
[0040] Working principle:
[0041] During use, the two expansion heads 1 are opened to their maximum distance. The limiting mechanism between expansion head 1 and extension head 2 is opened by moving the two nuts 8. At this point, the lengths of expansion head 1 and extension head 2 can be adjusted to better suit the physiological characteristics of different patients. After adjustment, the two nuts 8 are rotated to fix the limiting mechanism. During the movement of the two screws 6, the limiting rod 7 ensures the accuracy of their movement. The entire system, through a telescopic mechanism, ensures that the expansion operation accurately reaches the required position, achieving effective expansion and improving treatment results. During expansion, the roller 11 is rotated to drive the fixed screws 1... When screw 5 rotates, the connecting block 10 sleeved on it moves due to the thread action. During the movement of the connecting block 10, it will drive the slider 4 and the extension head 2 fixed on the slider 4 to move together. When screw 5 rotates, its pitch is fixed and precise. The advance or retreat distance of screw 5 for each rotation can be accurately calculated. This allows the expansion degree of screw expansion head 1 to be controlled very precisely. Doctors can accurately adjust the expansion range according to the patient's specific condition and treatment needs to ensure that the expansion effect meets the treatment expectations and avoid over- or under-expansion that may cause harm to the patient.
[0042] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.
Claims
1. An expansion device for cervical cancer radiotherapy patients, comprising two expansion heads (1), characterized in that, Both expansion heads (1) have extension heads (2) for extension that are movably engaged on their right surfaces. A main rod (3) is provided on the right side of both extension heads (2). Two screws (6) are movably sleeved inside the main rod (3). A screw (5) is provided on the right side of the main rod (3). Among them, the lower screw of the two screws (6) is threaded with a nut (8) for limiting the position on its annular side, and the lower extension head (2) of the two extension heads (2) is fixedly connected to a slider (4), and a connecting block (10) is fixedly connected to the right surface of the slider (4).
2. The dilation device for cervical cancer radiotherapy patients as described in claim 1, characterized in that: Both expansion heads (1) are fixedly connected to the opposite faces with locking blocks (9); The two card blocks (9) are respectively fixedly connected to the two screw rods (6).
3. The dilation device for cervical cancer radiotherapy patients as described in claim 1, characterized in that: A limiting rod (7) is fixedly connected to the annular side of the upper screw (6) of the two screws; The limiting rod (7) is movably connected to the lower screw of the two screws (6).
4. The dilation device for cervical cancer radiotherapy patients as described in claim 1, characterized in that: The right surface of the main rod (3) is fixedly connected to two fixing blocks (12); Both of the fixing blocks (12) are rotatably connected to the screw (5).
5. The dilation device for cervical cancer radiotherapy patients as described in claim 1, characterized in that: A roller (11) is fixedly connected to the lower surface of the screw (5).
6. The dilation device for cervical cancer radiotherapy patients as described in claim 1, characterized in that: The connecting block (10) is threadedly connected to the screw (5).
7. The dilation device for cervical cancer radiotherapy patients as described in claim 1, characterized in that: A limiting groove (13) is formed through the left surface of the main rod (3).
8. The dilation device for cervical cancer radiotherapy patients as described in claim 7, characterized in that: The limiting groove (13) is movably connected to the slider (4).