A precise tumor tissue stripping device for gastrointestinal stromal tumor surgery

Abstract

The present application relates to the technical field of medical apparatus and instruments, in particular to a tumor tissue precise stripping device for gastrointestinal stromal tumor surgery, which comprises a hand-held operating rod, a function executing assembly and a negative pressure control assembly, the function executing assembly comprises a negative pressure fixing assembly, an angle adjusting assembly and a stripping assembly, the angle adjusting assembly is fixedly installed at the end of the hand-held operating rod, the negative pressure fixing assembly is detachably connected to the angle adjusting assembly, and the stripping assembly is embedded at the connection between the angle adjusting assembly and the negative pressure fixing assembly; the negative pressure fixing assembly is in communication with the negative pressure control assembly, and the negative pressure fixing assembly is used for realizing the clamp-free fixation of tumor tissue through negative pressure suction; the angle adjusting assembly is used for adjusting the orientation angle of the negative pressure fixing assembly to adapt to different surgical operation postures; and the stripping assembly is used for stripping the tumor tissue fixed by the negative pressure. The present application realizes the clamp-free stable fixation of tumor tissue, and simultaneously realizes the cooperative matching of fixation and stripping.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a device for precise tumor tissue removal during surgery for gastrointestinal stromal tumors. Background Technology

[0002] In gastrointestinal stromal tumor surgery, there are currently two main surgical approaches: one involves removing the tumor along its margin using an ultrasonic scalpel or electrocautery hook, followed by suturing the defect with barbed sutures or closing it with a linear cutting device; the other involves lifting the tumor and directly removing it with a linear cutting device. However, both of these surgical approaches present numerous technical challenges in practice, and existing auxiliary dissection devices cannot effectively adapt to the two surgical positions, making it difficult to meet the demands of precise surgery.

[0003] First, in current surgical procedures, whether it is enucleation or lifting and resection, there is a lack of reliable tumor fixation structures. They mostly rely on manual support or simple clamp fixation by medical staff. Manual support can easily cause the tumor to slide and shift, increasing the difficulty of dissection and the operation time. Clamp fixation is prone to breakage of soft and easily ruptured tumors due to improper force control, thereby increasing the risk of tumor metastasis. This is also one of the most prominent problems in current surgery.

[0004] Secondly, the existing devices lack a structure that allows for flexible angle adjustment. Medical staff can only adapt by adjusting their own operating posture or the angle of holding the surgical instruments. This is cumbersome and can easily lead to angle deviation, which in turn affects the accuracy of dissection and may accidentally touch the surrounding normal gastrointestinal mucosa and blood vessels, causing complications such as bleeding.

[0005] Furthermore, existing dissection instruments and fixation structures are independent of each other and cannot work together. During the dissection process, medical staff need to take care of both fixation and dissection operations, which not only increases the workload of medical staff, but also easily leads to problems such as incomplete dissection and excessive damage to surrounding normal tissues. It is difficult to adapt to the dissection needs of gastrointestinal stromal tumors of different sizes and locations, and cannot meet the development needs of refined clinical surgery.

[0006] In summary, the present invention provides a precise tumor tissue dissection device for gastrointestinal stromal tumor surgery to solve the above-mentioned problems. Summary of the Invention

[0007] To address the aforementioned issues, this invention provides a precise tumor tissue dissection device for gastrointestinal stromal tumor (GIST) surgery. This device is designed to adapt to two commonly used surgical methods for GISTs (enucleation along the tumor margin and tumor lifting and resection). It achieves clamp-free, stable fixation of the tumor tissue, flexibly adjusts the tumor orientation to suit different surgical positions, and simultaneously achieves synergistic coordination between fixation and dissection. This improves the precision and safety of surgical dissection, reduces the risk of tumor fragmentation, metastasis, and intraoperative bleeding, alleviates the operational burden on medical staff, and meets the needs of refined clinical surgery.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows: A precise tumor tissue dissection device for gastrointestinal stromal tumor surgery includes a handheld operating rod, a functional execution component disposed at the front end of the handheld operating rod, and a negative pressure control component disposed inside the handheld operating rod. The functional execution component includes a negative pressure fixing component, an angle adjustment component, and a dissection component. The angle adjustment component is fixedly installed at the end of the handheld operating rod. The negative pressure fixing component is detachably connected to the end of the angle adjustment component away from the handheld operating rod. The dissection component is embedded at the connection between the angle adjustment component and the negative pressure fixing component, and the dissection component is distributed circumferentially along the edge of the negative pressure fixing component.

[0009] The negative pressure fixation component is connected to the negative pressure control component. The negative pressure fixation component is used to achieve clamp-free fixation of tumor tissue through negative pressure suction; the angle adjustment component is used to adjust the orientation angle of the negative pressure fixation component to adapt to different surgical operation postures; the dissection component is used to dissect the tumor tissue after negative pressure fixation.

[0010] Furthermore, the negative pressure fixation component includes a flexible cup-shaped suction tip, a sealing connector, and an adjustable locking ring. The inner diameter of the flexible cup-shaped suction tip is larger than the diameter of commonly seen gastrointestinal stromal tumors. The opening edge of the flexible cup-shaped suction tip is provided with an annular groove, and the adjustable locking ring is fitted into the annular groove. The adjustable locking ring is used to adjust the opening size of the flexible cup-shaped suction tip to adapt to tumors of different sizes. One end of the sealing connector is integrally formed with the bottom of the flexible cup-shaped suction tip, and the other end of the sealing connector is sealed and connected to the angle adjustment component. The sealing connector has a negative pressure channel inside. One end of the negative pressure channel is connected to the inner cavity of the flexible cup-shaped suction tip, and the other end of the negative pressure channel extends into the handheld operating lever and is connected to the negative pressure control component.

[0011] Furthermore, the negative pressure control component includes a negative pressure pump, a negative pressure sensor, a pressure relief valve, and a negative pressure chamber. The negative pressure pump is fixedly installed inside the handheld operating lever. The negative pressure chamber (5) is opened inside the handheld operating lever (1). The output end of the negative pressure pump is connected to the negative pressure chamber. The negative pressure chamber is connected to the negative pressure channel of the sealing joint. The pressure relief valve is installed on the side wall of the negative pressure chamber. The negative pressure sensor is embedded in the inner wall of the flexible cup-shaped suction head. The negative pressure sensor is used to collect negative pressure adsorption pressure data in real time. The negative pressure sensor signal is connected to the controller. The negative pressure pump and the pressure relief valve are both electrically connected to the controller. When the adsorption pressure data detected by the negative pressure sensor is lower than the preset pressure threshold, the controller starts the negative pressure pump to replenish the pressure. When the adsorption pressure data is higher than the preset pressure threshold, the pressure relief valve automatically opens to release pressure.

[0012] Furthermore, the angle adjustment assembly includes a rotating base, a linkage shaft, and an angle locking component. The rotating base is fixedly installed at the front end of the handheld operating lever. One end of the linkage shaft is hinged to the rotating base, and the other end of the linkage shaft is fixedly connected to a sealing joint. The side wall of the linkage shaft is provided with an annular toothed groove. The angle locking component includes a locking bolt and a linkage gear. The locking bolt is threaded through the rotating base and extends into the interior of the rotating base. The linkage gear is fixedly installed at the end of the locking bolt, and the linkage gear meshes with the annular toothed groove of the linkage shaft.

[0013] Furthermore, the peeling assembly includes several arc-shaped peeling blades, a blade telescopic mechanism, and an ultrasonic drive module. The arc-shaped peeling blades are uniformly embedded circumferentially along the opening edge of the flexible bowl-shaped suction head. The output end of the blade telescopic mechanism is fixedly connected to the arc-shaped peeling blades. The ultrasonic drive module is electrically connected to the arc-shaped peeling blades. The ultrasonic drive module is used to drive the blades to vibrate at high frequency to achieve cutting and peeling.

[0014] Furthermore, the telescopic mechanism includes several telescopic push rods, sliders, and cam transmission components. Each telescopic push rod corresponds to an arc-shaped peeling cutter head. One end of the telescopic push rod is fixedly connected to the arc-shaped peeling cutter head, and the other end of the telescopic push rod is fixedly connected to the slider. The cam transmission component includes a cam and a transmission support rod. The cam is rotatably installed inside the rotating seat. One end of the transmission support rod is hinged to the cam, and the other end of the transmission support rod is hinged to the slider.

[0015] Furthermore, the telescopic mechanism is also equipped with a stroke limiter and a pressure sensor. The stroke limiter is fixedly installed on the telescopic push rod and is used to limit the maximum extension length of the telescopic push rod. The pressure sensor is embedded at the connection between the telescopic push rod and the arc-shaped dissection head. The pressure sensor is electrically connected to the controller. When the head contacts the tumor tissue and generates a preset pressure, the pressure sensor sends a signal to the controller. The controller synchronously adjusts the vibration frequency of the ultrasonic drive module and the adsorption pressure of the negative pressure pump.

[0016] Furthermore, an adjusting bolt is threaded through the adjustable locking ring. The adjusting bolt is used to change the tightness of the adjustable locking ring, thereby adjusting the opening size of the flexible cup-shaped suction head to adapt to tumors of different diameters.

[0017] Furthermore, the flexible bowl-shaped suction head has evenly distributed anti-slip protrusions on its inner wall; the cutting edge of the arc-shaped peeling head is designed with a blunt arc shape.

[0018] Furthermore, a display screen is embedded in the handheld control stick, and the controller is electrically connected to the display screen.

[0019] The above approach has the following beneficial effects:

[0020] 1. This solution achieves clamp-free fixation of tumor tissue through a negative pressure fixation component. Combined with the structural design of an adjustable locking ring and a flexible cup-shaped suction tip, it can flexibly adapt to tumors of different sizes. Compared with the clamp-type fixation device in traditional technology, it effectively avoids the problem of tumor breakage caused by improper clamping force, reducing the risk of tumor metastasis. At the same time, the anti-slip protrusions on the inner wall of the flexible cup-shaped suction tip work synergistically with the negative pressure adsorption to greatly improve the stability of tumor fixation. It solves the drawbacks of traditional devices that make tumors easy to slide and shift after fixation, affecting the dissection operation, and makes the surgical operation smoother.

[0021] 2. This solution features a mechanical linkage structure between the angle adjustment component and the blade extension mechanism. The linkage shaft drives the cam to rotate, thereby achieving synchronous adaptation between the blade extension length and the orientation angle of the negative pressure fixing component. Compared with traditional technologies where angle adjustment and blade adjustment are independent, this eliminates the need for medical personnel to manually adjust the blade extension length, significantly improving the coordination and efficiency of surgical operations. It also avoids problems such as incomplete dissection or excessive damage to surrounding normal tissue caused by improper adaptation of the angle and blade, further enhancing the precision of the surgery.

[0022] 3. This solution achieves automatic control of negative pressure and ultrasonic vibration frequency through the coordinated linkage of negative pressure sensor, pressure sensor and controller. At the same time, the stroke limiter can limit the maximum extension length of the blade. Compared with the traditional technology that relies on the experience of medical staff to manually adjust parameters, this solution can adjust relevant parameters according to the real-time situation of the operation without manual intervention. This reduces the operation burden of medical staff, avoids the surgical risks caused by human operation deviation, effectively protects the surrounding normal gastrointestinal mucosa and blood vessels, reduces intraoperative bleeding and improves the safety of the operation.

[0023] 4. In this solution, the negative pressure fixation component adopts a detachable design, and the opening size can be finely adjusted through the adjustable locking ring. At the same time, the arc-shaped dissection head can flexibly adapt to different surgical needs. Compared with the traditional dissection device with a fixed structure and poor versatility, it can adapt to tumors of different sizes and infiltration depths without replacing the entire device, which greatly improves the versatility and flexibility of the device and reduces medical costs. Meanwhile, the display screen on the handheld operating lever can display various surgical parameters in real time. Compared with the device in the traditional technology where parameters are not visible, it allows medical staff to accurately control the surgical process, further improving the controllability and standardization of the surgery. Attached Figure Description

[0024] Figure 1 This is an isometric view of an embodiment of the precise tumor tissue dissection device for gastrointestinal stromal tumor surgery of the present invention;

[0025] Figure 2 This is a top view of an embodiment of the precise tumor tissue dissection device for gastrointestinal stromal tumor surgery of the present invention;

[0026] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0027] Figure 4 This is a side view of an embodiment of the precise tumor tissue dissection device for gastrointestinal stromal tumor surgery of the present invention;

[0028] Figure 5 for Figure 4 A cross-sectional view along the BB direction.

[0029] The reference numerals in the accompanying drawings include: 1. Handheld operating lever; 2. Flexible cup-shaped suction head; 3. Negative pressure channel; 4. Negative pressure pump; 5. Negative pressure chamber; 6. Linkage shaft; 7. Annular toothed groove; 8. Locking bolt; 9. Linkage gear; 10. Arc-shaped peeling blade; 11. Telescopic push rod; 12. Display screen. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The following detailed description illustrates the specific implementation method:

[0034] Example 1:

[0035] As attached Figures 1 to 5 As shown: A precise tumor tissue dissection device for gastrointestinal stromal tumor surgery includes a handheld operating rod 1, a functional execution component disposed at the front end of the handheld operating rod 1, and a negative pressure control component disposed inside the handheld operating rod 1. The functional execution component includes a negative pressure fixing component, an angle adjustment component, and a dissection component. The angle adjustment component is fixedly installed at the end of the handheld operating rod 1. The negative pressure fixing component is detachably connected to the end of the angle adjustment component away from the handheld operating rod 1. The dissection component is embedded at the connection between the angle adjustment component and the negative pressure fixing component, and the dissection component is distributed circumferentially along the edge of the negative pressure fixing component.

[0036] The negative pressure fixation component is connected to the negative pressure control component. The negative pressure fixation component is used to achieve clamp-free fixation of tumor tissue through negative pressure suction; the angle adjustment component is used to adjust the orientation angle of the negative pressure fixation component to adapt to different surgical operation postures; the dissection component is used to dissect the tumor tissue after negative pressure fixation.

[0037] The negative pressure fixation assembly includes a flexible cup-shaped suction tip 2, a sealing connector, and an adjustable locking ring. The inner diameter of the flexible cup-shaped suction tip 2 is larger than the diameter of commonly seen gastrointestinal stromal tumors. The inner wall of the flexible cup-shaped suction tip 2 has evenly distributed anti-slip protrusions. The opening edge of the flexible cup-shaped suction tip 2 has an annular groove, in which the adjustable locking ring is fitted. The adjustable locking ring is used to adjust the opening size of the flexible cup-shaped suction tip 2 to accommodate tumors of different sizes. One end of the sealing connector is integrally formed with the bottom of the flexible cup-shaped suction tip 2, and the other end of the sealing connector is sealed to the angle adjustment assembly. The sealing connector has a negative pressure channel 3 inside. One end of the negative pressure channel 3 connects to the inner cavity of the flexible cup-shaped suction tip 2, and the other end of the negative pressure channel 3 extends into the handheld operating lever 1 and connects to the negative pressure control assembly. An adjusting bolt is threaded through the adjustable locking ring. The adjusting bolt is used to change the tightness of the adjustable locking ring, thereby adjusting the opening size of the flexible cup-shaped suction tip 2 to accommodate tumors of different diameters.

[0038] The negative pressure control assembly includes a negative pressure pump 4, a negative pressure sensor, a pressure relief valve, and a negative pressure chamber 5. The negative pressure pump 4 is fixedly installed inside the handheld operating lever 1, and the negative pressure chamber 5 is opened inside the handheld operating lever 1. The output end of the negative pressure pump 4 is connected to the negative pressure chamber 5, and the negative pressure chamber 5 is connected to the negative pressure channel 3 of the sealing joint. The pressure relief valve is installed on the side wall of the negative pressure chamber 5. The negative pressure sensor is embedded in the inner wall of the flexible cup-shaped suction head 2. The negative pressure sensor is used to collect negative pressure adsorption pressure data in real time. The negative pressure sensor signal is connected to the controller. The negative pressure pump 4 and the pressure relief valve are both electrically connected to the controller. When the adsorption pressure data detected by the negative pressure sensor is lower than the preset pressure threshold, the controller starts the negative pressure pump 4 to replenish the pressure. When the adsorption pressure data is higher than the preset pressure threshold, the pressure relief valve automatically opens to release pressure.

[0039] The angle adjustment assembly includes a rotating base, a linkage shaft 6, and an angle locking component. The rotating base is fixedly installed at the front end of the handheld operating lever 1. One end of the linkage shaft 6 is hinged to the rotating base, and the other end of the linkage shaft 6 is fixedly connected to a sealing joint. The side wall of the linkage shaft 6 is provided with an annular toothed groove 7. The angle locking component includes a locking bolt 8 and a linkage gear 9. The locking bolt 8 is threaded through the rotating base and extends into the interior of the rotating base. The linkage gear 9 is fixedly installed at the end of the locking bolt 8, and the linkage gear 9 meshes with the annular toothed groove 7 of the linkage shaft 6.

[0040] The peeling assembly includes several arc-shaped peeling blades 10, a blade telescopic mechanism, and an ultrasonic drive module. The arc-shaped peeling blades 10 are uniformly embedded circumferentially along the opening edge of the flexible bowl-shaped suction head 2. The output end of the blade telescopic mechanism is fixedly connected to the arc-shaped peeling blades 10. The ultrasonic drive module is electrically connected to the arc-shaped peeling blades 10 and is used to drive the blades to vibrate at high frequency to achieve cutting and peeling. The cutting edge of the arc-shaped peeling blades 10 has a blunt arc design.

[0041] The telescopic mechanism of the cutter head includes several telescopic push rods 11, a slider, and a cam transmission component. Each telescopic push rod 11 corresponds to an arc-shaped peeling cutter head 10. One end of the telescopic push rod 11 is fixedly connected to the arc-shaped peeling cutter head 10, and the other end of the telescopic push rod 11 is fixedly connected to the slider. The cam transmission component includes a cam and a transmission support rod. The cam is rotatably installed inside the rotary seat. One end of the transmission support rod is hinged to the cam, and the other end of the transmission support rod is hinged to the slider.

[0042] The telescopic mechanism of the blade head is also equipped with a stroke limiter and a pressure sensor. The stroke limiter is fixedly installed on the telescopic push rod 11 and is used to limit the maximum extension length of the telescopic push rod 11. The pressure sensor is embedded in the connection between the telescopic push rod 11 and the arc-shaped peeling blade head 10. The pressure sensor is electrically connected to the controller. When the blade head contacts the tumor tissue and generates a preset pressure, the pressure sensor sends a signal to the controller. The controller synchronously adjusts the vibration frequency of the ultrasound drive module and the adsorption pressure of the negative pressure pump 4.

[0043] A display screen 12 is embedded in the handheld control lever 1, and the controller is electrically connected to the display screen 12.

[0044] The specific implementation process is as follows: In the preoperative preparation stage, medical staff first complete the preliminary debugging and adaptation of the device according to the size of the gastrointestinal stromal tumor to be removed during the operation, ensuring smooth linkage of all structures of the device and reasonable parameter settings, laying the foundation for precise surgical operation. First, the medical staff observe the actual diameter of the tumor during the operation and select a flexible cup-shaped suction tip 2 with an inner diameter slightly larger than the diameter of the tumor, reducing medical costs and improving the versatility of the device, solving the technical pain point of the existing device's fixed suction tip and inability to adapt to tumors of different sizes.

[0045] If the opening size of the selected flexible cup-shaped suction tip 2 is not well-suited to the tumor diameter, medical staff can rotate the adjusting bolt on the adjustable locking ring. By adjusting the bolt, the tightness of the adjustable locking ring is changed, thereby adjusting the expansion and contraction of the opening of the flexible cup-shaped suction tip 2 until the opening size is perfectly matched to the tumor diameter. This ensures that the flexible cup-shaped suction tip 2 can completely wrap around the tumor, while avoiding an opening that is too large, leading to negative pressure dispersion and unstable adsorption, or an opening that is too small, causing the tumor to break. The inner wall of the flexible cup-shaped suction tip 2 has evenly distributed anti-slip protrusions. After adjustment, the anti-slip protrusions can form effective contact with the tumor surface, further enhancing the stability of tumor fixation in conjunction with subsequent negative pressure adsorption. Through the synergistic effect of the adjustable locking ring and the anti-slip protrusions, adaptation to tumors of different sizes is achieved, and the problems of slippage and unstable fixation in traditional negative pressure adsorption are solved. At the same time, the damage to the tumor caused by clamp fixation is avoided, reducing the risk of metastasis after tumor fragmentation.

[0046] After preoperative debugging is completed, medical staff connect the device to an external power source and start the device. The controller automatically initializes various parameters, and the negative pressure sensor and pressure sensor start synchronously to collect relevant data in real time and transmit it to the controller. The controller processes the data and displays it on the display screen 12 of the handheld operating lever 1. Medical staff can clearly observe parameters such as negative pressure and blade status through the display screen 12, which facilitates real-time control of the surgical process.

[0047] After the surgery begins, medical staff hold the operating lever 1 and align the flexible cup-shaped suction tip 2 with the gastrointestinal stromal tumor during the operation. They slowly move the device to allow the tumor to completely enter the inner cavity of the flexible cup-shaped suction tip 2, ensuring that the opening edge of the flexible cup-shaped suction tip 2 gently adheres to the normal tissue surrounding the tumor, avoiding compression of the normal gastrointestinal mucosa by the edge of the suction tip. At this time, the medical staff activate the negative pressure control component through the controller, and the negative pressure pump 4 starts working. Through the negative pressure chamber 5 and the negative pressure channel 3 inside the sealed connector, negative pressure is delivered to the inner cavity of the flexible cup-shaped suction tip 2, achieving clamp-free adsorption and fixation of the tumor.

[0048] During the negative pressure adsorption process, a negative pressure sensor embedded in the inner wall of the flexible bowl-shaped suction head 2 collects adsorption pressure data in real time and transmits it synchronously to the controller. The controller compares the collected pressure value with a preset pressure threshold. When the adsorption pressure value detected by the negative pressure sensor is lower than the preset threshold, it indicates insufficient negative pressure, which may lead to poor adhesion of the tumor and slippage during the operation. At this time, the controller automatically starts the negative pressure pump 4 to supplement the pressure until the pressure reaches the preset threshold. When the pressure is higher than the preset threshold, the pressure relief valve automatically opens to release pressure, avoiding excessive pressure that could damage the tumor and surrounding normal gastrointestinal mucosa, and preventing the suction head from adhering to the tumor due to excessive negative pressure, making separation difficult. This achieves intelligent and automated control of negative pressure, eliminating the need for medical staff to manually adjust the negative pressure adjustment knob. This reduces the operational burden on medical staff, ensures the stability of negative pressure, and solves the technical problems of uncontrollable negative pressure and poor adhesion or excessive damage in existing devices, significantly improving the safety of the operation.

[0049] After the tumor is fixed under negative pressure, the medical staff selects the appropriate surgical posture (removal along the tumor edge or lifting and resection of the tumor) according to the needs of the surgical operation, and adjusts the orientation angle of the flexible cup-shaped suction head 2 through the angle adjustment component. When it is necessary to remove along the tumor edge, the medical staff rotates the locking bolt 8 of the angle locking component. Since the linkage gear 9 at the end of the locking bolt 8 meshes with the annular tooth groove 7 on the side wall of the linkage shaft 6, rotating the locking bolt 8 can drive the linkage gear 9 to rotate, thereby driving the linkage shaft 6 to rotate hingedly in the rotating seat. The linkage shaft 6 simultaneously drives the sealing joint and the flexible cup-shaped suction head 2 to rotate, adjusting the flexible cup-shaped suction head 2 to a horizontal state, so that the suction head opening is flush with the tumor edge, which facilitates the precise dissection of the arc-shaped dissection blade head 10 along the tumor edge. When it is necessary to lift and resect the tumor, similarly, the locking bolt 8 is rotated to adjust the flexible cup-shaped suction head 2 to a vertical state, and the tumor is lifted by negative pressure suction, separating the tumor from the surrounding normal tissue, which facilitates rapid resection.

[0050] After the angle adjustment is completed, tighten the locking bolt 8. The linkage gear 9 and the annular tooth groove 7 of the linkage shaft 6 are tightly engaged to lock the angle, prevent angle deviation during the operation, and ensure the stability of the dissection operation. During the rotation adjustment of the linkage shaft 6, the linkage shaft 6 synchronously drives the cam inside the rotating seat to rotate. The cam drives the slider to slide through the transmission support rod. The slider drives the telescopic push rod 11, which is fixedly connected to it, to extend and retract. This, in turn, drives the arc-shaped dissection blade 10 to extend or retract synchronously. When the flexible cup-shaped suction head 2 is adjusted to the horizontal state (edge ​​excision posture), the cam rotates and drives the slider to slide towards the suction head. The telescopic push rod 11 extends only a short length, and the arc-shaped dissection blade 10 extends only slightly beyond the edge of the suction head, which is suitable for the shallow dissection requirements of edge excision. When adjusted to the vertical state (lifting and resection posture), the cam rotates in the opposite direction, the slider slides away from the suction head, the telescopic push rod 11 extends longer, and the arc-shaped dissection blade 10 extends a longer length beyond the edge of the suction head, which is suitable for the deep dissection requirements of the tumor after lifting. No medical staff need to adjust the blade extension length separately, which greatly improves the coordination of operation and surgical efficiency, while avoiding incomplete dissection or excessive damage caused by the mismatch between the blade extension length and the surgical posture.

[0051] After the angle adjustment and blade extension / retraction adaptation are completed, medical staff activate the ultrasonic drive module. The ultrasonic drive module drives the arc-shaped dissection blade 10 to vibrate at high frequency, starting the dissection operation on the tumor tissue fixed under negative pressure. The arc-shaped dissection blade 10 is uniformly embedded circumferentially along the opening edge of the flexible cup-shaped suction head 2, and the cutting edge adopts a blunt arc design. The circumferentially distributed blades can achieve all-round and uniform dissection of tumor tissue, avoiding incomplete local dissection. At the same time, the blunt arc cutting edge can effectively avoid accidental contact with surrounding normal blood vessels and gastrointestinal mucosa during dissection, reducing intraoperative bleeding and solving the technical problems of unreasonable blade design and easy damage to surrounding tissues in existing devices.

[0052] During the dissection process, a pressure sensor embedded at the connection between the telescopic push rod 11 and the arc-shaped dissection head 10 collects real-time pressure data of the contact between the head and the tumor tissue, and transmits it synchronously to the controller. When the head contacts the tumor tissue and generates a preset pressure, the pressure sensor sends a signal to the controller, which synchronously adjusts the vibration frequency of the ultrasonic drive module and the suction pressure of the negative pressure pump 4. When the pressure is too high, it indicates that the head is squeezing the tumor too strongly, and the controller automatically reduces the vibration frequency of the ultrasonic drive module and appropriately reduces the negative pressure suction pressure to prevent the tumor from breaking. When the pressure is too low, it indicates that the head is not in sufficient contact with the tumor, and the controller appropriately increases the vibration frequency of the ultrasonic drive module and increases the negative pressure suction pressure to ensure that the dissection avoids residue.

[0053] Meanwhile, the travel limiter on the telescopic mechanism restricts the maximum extension length of the telescopic push rod 11, preventing excessive extension of the blade and further preventing damage to surrounding normal tissue, thus providing dual protection. It achieves coordinated control of dissection force, ultrasonic power, and negative pressure, organically combining these three elements to simultaneously solve three core technical problems: tumor fragmentation, incomplete dissection, and damage to normal tissue. It can automatically adjust parameters according to real-time conditions during surgery, eliminating the need for manual intervention by medical staff. This improves surgical precision and safety while reducing the operational burden on medical personnel.

[0054] During the dissection process, medical staff can monitor parameters such as negative pressure, blade contact pressure, and ultrasonic vibration frequency in real time via the display screen 12 on the handheld operating lever 1. Depending on the progress of the surgery, they can manually fine-tune the negative pressure adjustment knob or operating button to further optimize the surgical parameters. The anti-slip protrusions of the flexible bowl-shaped suction tip 2, combined with the negative pressure adsorption, effectively prevent the tumor from sliding and shifting during dissection, ensuring the continuity and precision of the dissection operation. This solves the technical pain points of existing devices, such as poor tumor fixation stability and easy intraoperative displacement.

[0055] After the tumor tissue is removed, the ultrasound drive module is turned off, and medical staff can remove the tumor using the flexible cup-shaped suction head 2. Then, the negative pressure pump 4 is turned off, and the pressure relief valve inside the negative pressure chamber 5 automatically opens to release the negative pressure, allowing the flexible cup-shaped suction head 2 to separate from the removed tumor, completing the core operation of the surgery.

[0056] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made 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 scope of protection of this invention.

Claims

1. A precise tumor tissue dissection device for gastrointestinal stromal tumor surgery, comprising a handheld operating lever (1), a functional execution component disposed at the front end of the handheld operating lever (1), and a negative pressure control component disposed inside the handheld operating lever (1), characterized in that, The function execution component includes a negative pressure fixing component, an angle adjustment component and a peeling component. The angle adjustment component is fixedly installed at the end of the handheld operating lever (1). The negative pressure fixing component is detachably connected to the end of the angle adjustment component away from the handheld operating lever (1). The peeling component is embedded at the connection between the angle adjustment component and the negative pressure fixing component, and the peeling component is distributed circumferentially along the edge of the negative pressure fixing component. The negative pressure fixation component is connected to the negative pressure control component. The negative pressure fixation component is used to achieve clamp-free fixation of tumor tissue through negative pressure suction; the angle adjustment component is used to adjust the orientation angle of the negative pressure fixation component to adapt to different surgical operation postures; the dissection component is used to dissect the tumor tissue after negative pressure fixation.

2. The precise tumor tissue dissection device for gastrointestinal stromal tumor surgery according to claim 1, characterized in that, The negative pressure fixation component includes a flexible bowl-shaped suction tip (2), a sealing connector, and an adjustable locking ring. The inner diameter of the flexible bowl-shaped suction tip (2) is larger than the diameter of common gastrointestinal stromal tumors in clinical practice. The opening edge of the flexible bowl-shaped suction tip (2) is provided with an annular groove, and the adjustable locking ring is fitted into the annular groove. The adjustable locking ring is used to adjust the opening size of the flexible bowl-shaped suction tip (2) to adapt to tumors of different sizes. One end of the sealing connector is integrally formed with the bottom of the flexible bowl-shaped suction tip (2), and the other end of the sealing connector is sealed to the angle adjustment component. The sealing connector is provided with a negative pressure channel (3). One end of the negative pressure channel (3) is connected to the inner cavity of the flexible bowl-shaped suction tip (2), and the other end of the negative pressure channel (3) extends into the hand-held operating rod (1) and is connected to the negative pressure control component.

3. The precise tumor tissue dissection device for gastrointestinal stromal tumor surgery according to claim 2, characterized in that, The negative pressure control component includes a negative pressure pump (4), a negative pressure sensor, a pressure relief valve, and a negative pressure chamber (5). The negative pressure pump (4) is fixedly installed inside the hand-held operating lever (1). The negative pressure chamber (5) is opened inside the hand-held operating lever (1). The output end of the negative pressure pump (4) is connected to the negative pressure chamber (5). The negative pressure chamber (5) is connected to the negative pressure channel (3) of the sealing joint. The pressure relief valve is installed on the side wall of the negative pressure chamber (5). The negative pressure sensor is embedded in the inner wall of the flexible bowl-shaped suction head (2). The negative pressure sensor is used to collect negative pressure adsorption pressure data in real time. The negative pressure sensor signal is connected to the controller. The negative pressure pump (4) and the pressure relief valve are both electrically connected to the controller. When the adsorption pressure data detected by the negative pressure sensor is lower than the preset pressure threshold, the controller starts the negative pressure pump (4) to replenish the pressure. When the adsorption pressure data is higher than the preset pressure threshold, the pressure relief valve automatically opens to release pressure.

4. The precise tumor tissue dissection device for gastrointestinal stromal tumor surgery according to claim 3, characterized in that, The angle adjustment assembly includes a rotating seat, a linkage shaft (6), and an angle locking component. The rotating seat is fixedly installed at the front end of the hand-held operating lever (1). One end of the linkage shaft (6) is hinged to the rotating seat, and the other end of the linkage shaft (6) is fixedly connected to the sealing joint. The side wall of the linkage shaft (6) is provided with an annular toothed groove (7). The angle locking component includes a locking bolt (8) and a linkage gear (9). The locking bolt (8) is threaded through the rotating seat and extends into the interior of the rotating seat. The linkage gear (9) is fixedly installed at the end of the locking bolt (8), and the linkage gear (9) meshes with the annular toothed groove (7) of the linkage shaft (6).

5. The precise tumor tissue dissection device for gastrointestinal stromal tumor surgery according to claim 4, characterized in that, The peeling assembly includes several arc-shaped peeling blades (10), a blade telescopic mechanism, and an ultrasonic drive module. The arc-shaped peeling blades (10) are uniformly embedded around the opening edge of the flexible bowl-shaped suction head (2). The output end of the blade telescopic mechanism is fixedly connected to the arc-shaped peeling blades (10). The ultrasonic drive module is electrically connected to the arc-shaped peeling blades (10). The ultrasonic drive module is used to drive the blades to vibrate at high frequency to achieve cutting and peeling.

6. The precise tumor tissue dissection device for gastrointestinal stromal tumor surgery according to claim 5, characterized in that, The telescopic mechanism of the cutter head includes several telescopic push rods (11), a slider and a cam transmission component. The telescopic push rods (11) correspond one-to-one with the arc-shaped peeling cutter head (10). One end of the telescopic push rod (11) is fixedly connected to the arc-shaped peeling cutter head (10), and the other end of the telescopic push rod (11) is fixedly connected to the slider. The cam transmission component includes a cam and a transmission support rod. The cam is rotatably installed inside the rotating seat. One end of the transmission support rod is hinged to the cam, and the other end of the transmission support rod is hinged to the slider.

7. The precise tumor tissue dissection device for gastrointestinal stromal tumor surgery according to claim 6, characterized in that, The telescopic mechanism of the blade head is also equipped with a stroke limiter and a pressure sensor. The stroke limiter is fixedly installed on the telescopic push rod (11) and is used to limit the maximum extension length of the telescopic push rod (11). The pressure sensor is embedded in the connection between the telescopic push rod (11) and the arc-shaped peeling blade head (10). The pressure sensor is electrically connected to the controller. When the blade head contacts the tumor tissue and generates a preset pressure, the pressure sensor sends a signal to the controller. The controller synchronously adjusts the vibration frequency of the ultrasonic drive module and the adsorption pressure of the negative pressure pump (4).

8. The precise tumor tissue dissection device for gastrointestinal stromal tumor surgery according to claim 7, characterized in that, An adjusting bolt is threaded through the adjustable locking ring. The adjusting bolt is used to change the tightness of the adjustable locking ring, thereby adjusting the opening size of the flexible cup-shaped suction head (2) to adapt to tumors of different diameters.

9. The precise tumor tissue dissection device for gastrointestinal stromal tumor surgery according to claim 8, characterized in that, The flexible bowl-shaped suction head (2) has uniformly distributed anti-slip protrusions on its inner wall; the cutting edge of the arc-shaped peeling head (10) is a blunt arc design.

10. The precise tumor tissue dissection device for gastrointestinal stromal tumor surgery according to claim 9, characterized in that, A display screen (12) is embedded in the handheld control lever (1), and the controller is electrically connected to the display screen (12).

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