An auger for treating 3-4 grade of the thrombus of the vena cava

Abstract

The application discloses a reamer for processing 3-4 grade vena cava tumor thrombus, and the reamer comprises a flexible mirror body, a cutting device and an operation auxiliary device. The cutting device comprises an operation section and a cutting part located at the first end of the operation section, and the cutting part is used for twisting and cutting tumor thrombus tissue. The operation section and the flexible mirror body are both hollow pipe bodies, and the second end of the operation section is communicated with the flexible mirror body. Through the arrangement, the cutting part can be sent into the vicinity of the reaming position through the flexible mirror body. Then, through the negative pressure access pipe, the light source pipe, the optical fiber pipe and the perfusion pipe arranged on the operation auxiliary device, the image of the reaming position can be acquired in the operation process, the specific position and shape are determined, the tumor thrombus is quickly twisted and cut through the cutting part, and the cut tissue is discharged through the negative pressure access pipe, so that the reamer can be used for assisting the removal of 3-4 grade vena cava tumor thrombus.

Description

Technical Field

[0001] This utility model relates to the field of tumor aspiration technology, and in particular to a aspiration device for treating grade 3-4 vena cava tumor thrombi. Background Technology

[0002] Currently, treating patients with renal cell carcinoma (or other malignant tumors) complicated by grade 3-4 vena cava tumor thrombi presents significant challenges. There are two existing approaches: one is preoperative adjuvant therapy, which aims to downgrade the primary vena cava tumor thrombus before surgery; the other is direct primary surgery, which requires collaboration with cardiothoracic surgery. Under the support of cardiopulmonary bypass, nephrectomy (or resection of the primary tumor organ) and vena cava tumor thrombus resection are performed. However, this procedure often involves highly complex techniques such as thoracotomy, liver rotation, and cardiac arrest, resulting in significant surgical trauma and risks, a high intraoperative mortality rate, and a high risk of intraoperative thrombus detachment, distant organ embolism, and postoperative distant tumor metastasis. Only a small number of large tertiary hospitals and medical centers in China are capable of performing this procedure.

[0003] All of the above methods carry significant risks. For example, poor adjuvant therapy may lead to continued disease progression, and significant side effects may make neoadjuvant therapy difficult to implement. Direct primary surgery carries enormous risks, is technically challenging, and has a high surgical mortality rate. There is an urgent need for auxiliary devices to address the resection of vena cava tumor thrombi. Utility Model Content

[0004] To address the problems existing in current surgeries, this invention provides a suction device for treating grade 3-4 vena cava tumor thrombi, which, combined with vascular endoscopy, is used to assist in vena cava tumor thrombectomy.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a suction device for treating grade 3-4 vena cava tumor thrombi, comprising a flexible endoscope, a cutting device, and an operation auxiliary device;

[0006] The cutting device includes an operating section and a cutting part located at the first end of the operating section, the cutting part being used to cut the tumor embolus tissue;

[0007] Both the operating section and the flexible mirror body are hollow tubes, and the second end of the operating section is connected to the flexible mirror body;

[0008] The operation assistance device is installed through the hollow tube and extends to the end of the first end of the operation section. The operation assistance device includes a negative pressure access tube, a light source tube, and an optical fiber tube.

[0009] The negative pressure inlet pipe is used to provide negative pressure to the first end of the operation section;

[0010] The light source tube is used to provide illumination to the first end of the operation section by setting up a cold light source optical fiber;

[0011] The fiber optic tube is used to set up the video fiber optic transmission for the image at the first end of the operation segment.

[0012] Preferably, the cutting section includes a shaftless motor and a cutting impeller disposed on the shaftless motor, wherein the shaftless motor is fixedly installed between the end face of the first end and the port of the negative pressure inlet pipe.

[0013] Preferably, the suction device further includes a position adjustment device and a bending controller. The position adjustment device includes a bending section and a bending controller. The first end of the bending section is connected to the operating section, and the second end is connected to the first end of the flexible mirror body.

[0014] The bending section is used to bend under the control of the bending controller to adjust the end angle (i.e., the position of the suction head end).

[0015] Preferably, it also includes a handle connected to a second end of the flexible mirror body, and the bending controller is disposed on the handle.

[0016] Preferably, the handle is provided with a motor switch, which is used to control the shaftless motor.

[0017] Preferably, the cutting section includes a support frame, a micro servo motor, and a cutting tool; the support frame is fixed within the operating section, the micro servo motor is fixed on the support frame, and the cutting tool is fixed to the power output end of the micro servo motor.

[0018] Preferably, the cutting section further includes a cover plate and a plurality of cutting edges disposed on the surface of the cover plate, the cover plate being disposed on the side of the cutting tool away from the micro servo motor.

[0019] Preferably, the radius of the cutting edge is greater than the length from the edge to the center of the cover disk.

[0020] Preferably, the end face of the first end of the operating segment is an inclined plane with a preset angle, wherein the inclined angle is the angle between the end face and the axis perpendicular to the central axis of the operating segment.

[0021] Preferably, the first end of the operating segment is further provided with a front end cover, which is detachably connected to the first end of the operating segment.

[0022] Compared with the prior art, the above-mentioned technical solution of this application has the following beneficial effects:

[0023] The aforementioned technical solution includes a suction device for treating grade 3-4 vena cava tumor thrombi, comprising a flexible endoscope, a cutting device, and an operation aid device. The cutting device includes an operating section and a cutting part located at the first end of the operating section, the cutting part being used to cut the tumor thrombus tissue. Both the operating section and the flexible endoscope are hollow tubes, and the second end of the operating section is connected to the flexible endoscope. With this configuration, the cutting part can be inserted into the vicinity of the suction site through the flexible endoscope. Then, through the negative pressure access tube, light source tube, optical fiber tube, and irrigation tube set on the operation aid device, images of the suction site are acquired during the operation, and the specific location and shape are determined. The tumor thrombus is quickly cut by the cutting part, and the excised tissue is discharged through the negative pressure access tube, thereby assisting in the resection of grade 3-4 vena cava tumor thrombi. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure provided in the embodiments of this utility model;

[0025] Figure 2 As an embodiment of this utility model Figure 1 A magnified view of a portion of operating segment A;

[0026] Figure 3 This is a cross-sectional view of the cutting portion in Embodiment 1 of this utility model;

[0027] Figure 4 This is a schematic diagram of the shaftless motor provided in the embodiments of this utility model;

[0028] Figure 5 This is a cross-sectional view of the cutting portion in an embodiment of the present utility model;

[0029] Figure 6 This is a partial exploded view of the cutting part in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the front cover installation provided in an embodiment of the present utility model;

[0031] In the diagram: 1 Flexible mirror body, 2 Handle, 3 Control block, 4 Negative pressure inlet pipe, 5 Support frame, 6 Micro servo motor, 7 Transmission rod, 8 Assembly head, 9 Assembly slot, 10 Tool slot, 11 Locking screw, 12 Cutting tool, 13 Cover plate, 14 Cutting blade, 15 Pipeline groove, 16 Fiber optic tube, 17 Light source tube, 18 Injection tube, 19 Front end cover, 20 Bending section, 21 Operating section, 22 Motor switch, 23 Bending controller, 24 Wire, 25 Shaftless motor, 26 Cutting impeller. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0033] Based on the technical problems described in the background section, and building upon existing technology while considering the actual surgical needs of hospitals, the inventors have provided a suction device for treating grade 3-4 vena cava tumor thrombi. This auxiliary tool transforms existing high-difficulty, high-risk surgeries into routine procedures, allowing for more direct intraoperative observation of the vena cava tumor thrombus and enabling earlier surgical treatment for these patients, resulting in better therapeutic outcomes and longer survival times. This tool allows doctors to implement safer and more effective treatment plans compared to existing options, without increasing treatment costs (the additional auxiliary tool cost is very economical compared to the reduced risks and lower surgical or drug costs).

[0034] Please see Figures 1-4 Embodiment 1 of this application provides a suction device for treating grade 3-4 vena cava tumor thrombi, including a flexible endoscope 1 and a cutting device;

[0035] The cutting device includes an operating section 21 and a cutting part located at the end of the operating section 21; the cutting part is used to cut the tumor plug.

[0036] The other end of the operating section 21 is connected to the flexible mirror body 1. Both the flexible mirror body 1 and the operating section 21 are hollow tubes and can be coaxially arranged. In a specific embodiment, the two tubes have the same diameter.

[0037] Operating aids are fixedly installed on the inner side of the hollow tube body;

[0038] The operating auxiliary device is used to flush and illuminate the cutting site, thereby assisting in the task of strangulation of the tumor;

[0039] The operation auxiliary device includes a negative pressure inlet pipe 4 and a pipeline groove 15; both the negative pressure inlet pipe 4 and the pipeline groove 15 are installed inside the flexible mirror body 1 and the operation section 21, and there are three pipeline grooves 15.

[0040] See Figure 2 The light source tube 17, the injection tube 18 and the optical fiber tube 16 are fixed in sequence on the inner side of the three pipeline grooves 15; the three pipes are placed side by side and do not contact each other.

[0041] The irrigation tube 18 is used to infuse physiological saline to rinse the cutting area; the light source tube 17 and the fiber optic tube 16 are used to provide a field of view and video image for the operation; the negative pressure access tube 4 is used to extract and discharge the object cut by the cutting device along with the physiological saline.

[0042] In this specific implementation, the light source tube 17 uses a cold light source optical fiber; the optical fiber tube 16 uses a video optical fiber.

[0043] It should be noted that the negative pressure inlet pipe 4 provides a negative pressure drainage channel, with one end fixed to or near the cutting part, and the other end connected to the port of the negative pressure device or negative pressure center.

[0044] See Figures 3-4 The cutting section includes a shaftless motor 25, on which a cutting impeller 26 is mounted. The cutting impeller 26 is rotated by the shaftless motor 25 to achieve the slicing operation. The shaftless motor 25 of the cutting section has no central shaft, which effectively avoids the occurrence of lumps blocking the pipe in the middle position.

[0045] The shaftless motor 25 is fixedly installed near the end of the operating section 21 and is located between the port of the negative pressure inlet pipe 4 and the end face of the operating section 21. It can be understood that the negative pressure inlet pipe 4 is only used to provide negative pressure for cleaning and cutting tissue and as a conveying pipeline. The two ends of the shaftless motor 25 are the port of the negative pressure inlet pipe 4 and the end face of the operating section 21, respectively. It is not required that the shaftless motor 25 be absolutely located at the outlet of the port of the negative pressure inlet pipe 4. In specific implementation, it is sufficient to use negative pressure and convey the shredded tissue.

[0046] During operation, the shaftless motor 25 drives the cutting impeller 26 to rotate, which is used to remove tumor plugs.

[0047] In one specific implementation, see Figure 1 As shown, the suction device also includes a position adjustment device, which includes a bending section 20. The bending section 20 is a hollow tube. It can be understood that the bending section 20 is an extension of the flexible lens body 1. One end of the bending section 20 is connected to the operation section 21, and the other end of the bending section 20 is connected to the flexible lens body 1.

[0048] A control block 3 and a bending controller 23 are provided at the other end of the flexible mirror body 1 away from the bending section 20. A motor switch 22 is installed on the control block 3. In actual operation, these components are all located near the handle 2.

[0049] The bending controller 23 is used to regulate the bending section 20. This part is existing technology. The bending section 20 can be actively bent under the control of the bending controller 23. This structure can be achieved by combining existing technical solutions (for example, setting a power source in the pipeline that can provide tensile force to drive multiple steel wires set in the bending section 20). This part is not part of the improvement of this device.

[0050] The bending controller 23 is fixed on the flexible mirror body 1 and is electrically connected to the bending section 20. The bending controller 23 is used to adjust the bending angle of the bending section 20, thereby changing the operating angle of the operating section 21 (i.e., the angle position of the suction head end).

[0051] The motor switch 22 is electrically connected to the drive part of the cutting part and is used to control the opening and closing of the cutting part in the cutting device. For example, the shaftless motor 25 in the above embodiment or the micro servo motor 6 in the following embodiment, depending on the specific implementation structure.

[0052] In one specific embodiment, the cutting part is fixedly located 1-1.5 mm inside the end of the operating section 21, so that the blade in the cutting part does not protrude from the end plane of 21, and will not accidentally injure other tissues in the absence of negative pressure. During use, the negative pressure access tube 4 generates negative pressure to aspirate the venous aneurysm, drawing the aneurysm into the end of the operating section 21, and the cutting part removes the thrombus tissue. The removed portion is then sucked away by the negative pressure access tube.

[0053] It should be noted that the specific dimensions of the end can be adjusted and designed based on the specific dimensions of the cutting part and the needs of the actual surgical scenario. In one optional implementation, multiple models can be designed on this basis to suit different surgical requirements (e.g., determined by preoperative assessment according to different surgical subjects). Of course, those skilled in the art can also, based on the inspiration of this application, conduct extensive surgical observations and data collection in conjunction with the application products of this application, and appropriately adjust the above dimensions to obtain better size data as a specific model that can be applied to some scenarios.

[0054] The bending section 20, the flexible mirror body 1, and the operation section 21 are all provided with mounting slots, and the negative pressure inlet pipe 4 is fixed in the pipeline mounting slot.

[0055] In addition, during actual surgical procedures, the flexible endoscope 1 is inserted into the blood vessel, the operating section 21 is adjusted to the tumor site, and the bending angle of the bending section 20 (i.e., the angle position of the suction head end) is changed by adjusting the bending controller 23 on the control block 3 to clearly observe the actual position of the tumor thrombus; then the operating section (cutting part, i.e. the suction head end) is aligned with the tumor thrombus tissue, the negative pressure is turned on and connected to the negative pressure access tube 4, and the tumor thrombus is sucked into the operating section by the negative pressure and crushed by the cutting part to achieve the crushing of the tumor thrombus;

[0056] In one specific embodiment, the end face of the operating section 21 can be an inclined surface with a preset angle, which facilitates the movement and observation of the tumor thrombus and the completion of the cutting task; the inclination angle is the angle between the end face and the direction perpendicular to the central axis of the first end of the operating section;

[0057] The purpose of setting the included angle is to facilitate the strangulation of tumor thrombus tissue. This has been verified in the tests conducted on the relevant products of this application. The included angle setting can achieve a better strangulation effect compared to a horizontal plane perpendicular to the longitudinal axis.

[0058] It should be noted that in actual surgery, the optimal range angle setting can be adjusted according to the experimental situation. Different surgeries may have different needs. The data in this example is based on the reference given in the current application surgical test. In specific implementation, it can be adjusted through subsequent experiments based on different scenarios.

[0059] As an example, for instance, an angle of approximately 35° can be used. In actual operation, the angle between the operating section 21 and the tumor thrombus tissue can be adjusted. This part can be adjusted by controlling the bending section 20 during actual operation. The setting of the inclined plane can be combined with the control of the bending section to produce a better suction effect relative to the plane perpendicular to the longitudinal axis.

[0060] Understandably, the included angle here is used to cooperate with the flexible endoscope to form different working surfaces. In some other surgical scenarios, for example, it may be necessary to control the end face of the operating section 21 to achieve an included angle of more than 90° with the plane perpendicular to the longitudinal axis, so as to make it easier to reverse the suction end to treat the tumor thrombus tissue at the proximal end. In some cases, the end face needs to achieve 180° with the plane perpendicular to the longitudinal axis, which requires a larger included angle setting. Those skilled in the art can equip the end face with different included angles in actual product applications.

[0061] The light source tube 17 is used to provide light source illumination for surgical operations, and the fiber optic tube 16 is used to transmit the video signal generated by the reflection of the light source, so that the operator can observe the specific internal cutting effect through the monitor.

[0062] The infusion tube 18 is used to inject physiological saline to flush the venous thrombus site;

[0063] In this embodiment, the fiber optic tube 16 for transmitting video is located in the middle of the end face, the injection tube 18 is located on one side of the video fiber, and the cold light source or light source tube 17 is located on the other side of the video fiber. In a more preferred embodiment, the light source tube 17 can be arranged around the video fiber to provide a better lighting environment.

[0064] After flushing with saline solution in the infusion tube 18, the negative pressure connection tube 4 is turned on to generate negative pressure. While maintaining a clear field of vision, the amount of saline solution infused should be kept equal to the amount of fluid withdrawn under negative pressure to avoid a sudden increase in circulating blood volume that could lead to heart failure.

[0065] In practice, you can flush with water while simultaneously using negative pressure suction to remove the shredded tumor thrombus tissue. Repeat this process to gradually remove the tumor thrombus tissue.

[0066] In the above implementation scheme, the use of a shaftless motor 25 reduces the occupancy of the inner diameter of the tube; at the same time, the traditional stator shaft transmission mode is eliminated, and the cutting impeller 26 is directly driven to complete the cutting, which facilitates subsequent extraction, avoids congestion, and greatly improves work efficiency; in addition, in a specific implementation scheme, a certain gap is set between the shaftless motor 25 and the end of the operating section 21 to avoid damage to the exogenous tissue when inserting the blood vessel, and to ensure safety without affecting normal tangling, achieving multiple benefits. During the operation, under the action of negative pressure, the tissue to be cut is slightly indented and then cut off and sucked away by the cutting impeller 26, satisfying the tangling operation.

[0067] Please see Figures 5-6 In another specific embodiment, a different suction device structure for treating grade 3-4 vena cava tumor thrombi is further provided. The cutting part of the suction device specifically includes a support frame 5 and a micro servo motor 6.

[0068] The support frame 5 is installed inside the port of the negative pressure inlet pipe 4 on the operating section 21 or between the port of the operating section 21 and the port of the negative pressure inlet pipe 4.

[0069] A miniature servo motor 6 is fixed on the support frame 5; the support frame 5 is a long, narrow strip used to fix and support the miniature servo motor 6. The output shaft of the miniature servo motor 6 is connected to a transmission rod 7, and an assembly head 8 is fitted to the end of the transmission rod 7; see also Figure 6 Among them, the micro servo motor 6 is located on the first side of the support frame 5, the assembly head 8 is located on the second side of the support frame 5, the first side and the second side are symmetrical on both sides of the length direction of the narrow thin sheet, and the transmission rod 7 passes through the support frame 5;

[0070] The assembly head 8 is equipped with a cutting device, which includes a cutting blade 12 and a cover plate 13.

[0071] The assembly head 8 is provided with an assembly groove 9 and a tool groove 10; a locking screw 11 is threaded through the assembly groove 9 and connected to the transmission rod 7 to fix the assembly head 8 on the transmission rod 7; the tool groove 10 is used to fix and install the cutting tool 12.

[0072] The cover plate 13 is snapped into the end of the assembly slot 9, and the surface of the cover plate 13 is provided with a plurality of cutting edges 14;

[0073] The length of the cutting blade 12 does not exceed the length of the support frame 5 and is slightly shorter than the inner radius of the negative pressure inlet tube 4. Since it is dealing with flexible tissue, as long as the negative pressure inlet tube 4 accurately sucks in the cut material, the gap at the edge will not have a significant impact overall.

[0074] The diameter of the cover plate 13 is slightly larger than the area that the cutting tool 12 on the assembly head 8 cannot cover; in a specific embodiment, the radius of the cover plate 13 can be set to be larger than the length from the end of the tool groove 10 to the center of the assembly head 8, which can be set according to the actual situation.

[0075] The length of multiple cutting blades 14 can be set according to actual needs. By setting cutting blades 14 of different lengths, blind spots can be avoided during skewing, preventing incomplete removal of the tumor and affecting the normal progress of the surgery.

[0076] That is, the cutting tool 12 and the cutting edge 14 form different processing areas. The cutting edge 14 covers the connection between the assembly head 8 and the cutting tool 12, which can complete the reaming better.

[0077] The existing micro servo motor 6 can achieve a diameter of about 3mm. Through testing, it basically meets the usage requirements during operation. The center position of the micro servo motor 6 inside the tube is processed by the cutting edge 14, which does not significantly affect the discharge of the shredded material. Therefore, the operation mode of this traditional motor can also roughly meet the actual operation.

[0078] With the above structure, the micro servo motor 6 drives the transmission rod 7 to rotate, which in turn drives the assembly head 8 to rotate. The assembly head 8 drives the cutting tool 12 and the cutting edge 14 fixed on the assembly head 8 to rotate, which is used to cut the venous tumor thrombus more comprehensively.

[0079] A handle 2 is positioned between the flexible mirror body 1 and the control block 3, and the handle 2 is used by the operator to hold it; see also Figure 1 As shown, a switch for a negative pressure suction device or a negative pressure center interface is provided near the handle 2 for operating and providing negative pressure;

[0080] The rear of the handle has interfaces for connecting video, cold light source and power bus (power for cutting section or bending section 20).

[0081] There is a saline inlet / operation channel opening on the side of the handle; this part of the structure can be configured by those skilled in the art according to actual needs.

[0082] In the above scheme, since the scope 1 of the cauda vena cava is a flexible and bendable tube, it can be used to remove tumor thrombi in the vena cava and also to directly observe whether the vena cava wall is invaded by the tumor for subsequent treatment.

[0083] In one specific implementation, see Figure 7 As shown, the operating section 21 also includes a front end cap 19 that snaps onto the end (e.g. Figure 7 This supplements the existing Embodiment 1 and other specific implementation methods;

[0084] A locking structure is provided at the end of the operating section 21, and the two are assembled by fixing the front cover 19 to the locking structure with screws. The front cover 19 is used to disassemble the cutting part for maintenance, so that the cutting part is exposed to the tube body of the operating section 21. By setting the front cover 19, it is convenient to inspect the cutting part before surgery. After the inspection is completed, the front cover 19 is closed and the subsequent surgical task is carried out.

[0085] Setting a front cover 19 on the operating section 21 is a new exploration of the above-mentioned device. When the flexible mirror body 1, the bending section 20 and the operating section 21 are used as disposable consumables, it can limit the blade from being exposed, facilitate quick preoperative examination, and ensure the normal operation of the cutting section.

[0086] In practical operation and use, the above-mentioned device can be used in conjunction with the following description to help those skilled in the art understand the advantages of the inventor's improvements to the device. This description is only supplementary and should not be construed as a limitation of this application:

[0087] (1) Push the operating section 21 into the vicinity of the operating part through the flexible mirror body 1, and push it to the approximate position of the required suction;

[0088] (2) Illuminate the operating part with a fixed light source tube 17 and acquire the image of the operating part through the fiber optic tube 16; during this process, infuse physiological saline through the infusion tube 18 to clean the operating part, and at the same time turn on the negative pressure access tube 4 to extract the infused physiological saline; during this process, the amount of physiological saline extracted by the negative pressure should be controlled to avoid excessive extraction.

[0089] (3) After determining the shredding plan for the operation site, start the drive part of the cutting section through control block 3, and adjust the shredding power through control block 3. During this process, the negative pressure should be increased to facilitate the rapid extraction of the shredded tumor thrombus tissue and saline until the tumor thrombus becomes grade 0, thus completing the overall operation. The entire operation can be performed under the monitoring of transesophageal ultrasound to understand the status of the tumor thrombus at any time and ensure the safety of the patient during the operation.

[0090] Based on the above description, it can be seen that the device provided by this utility model has a compact structure, which facilitates the simplification of the treatment plan for grade 3-4 vena cava tumor thrombi in actual operation. It transforms the vena cava tumor thrombectomy into a surgery combined with vascular intervention. In the specific treatment plan, the device disclosed in this utility model can assist medical personnel in dividing the treatment of renal cancer (or other malignant tumors) complicated by vena cava tumor thrombi into a plan of first treating the tumor thrombus endovascularly and then routinely treating the primary tumor. Instead of the existing plan of first removing the primary tumor and then simultaneously cutting open the vena cava to remove the tumor thrombus, this avoids the high-difficulty techniques required in current surgical treatments such as thoracotomy, liver rotation, and cardiac arrest, and reduces the technical difficulty and risk of thrombectomy in the first stage.

[0091] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0092] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A suction device for treating grade 3-4 vena cava tumor thrombi, characterized in that, Includes flexible mirror body, cutting device, and operation assistance device; The cutting device includes an operating section and a cutting part located at the first end of the operating section, the cutting part being used to cut the tumor embolus tissue; Both the operating section and the flexible mirror body are hollow tubes, and the second end of the operating section is connected to the flexible mirror body; The operation assistance device is installed through the hollow tube and extends to the end of the first end of the operation section. The operation assistance device includes a negative pressure access tube, a light source tube, an optical fiber tube, and an injection tube. The negative pressure inlet pipe is used to provide negative pressure to the first end of the operation section; The light source tube is used to provide illumination to the first end of the operation section by setting up a cold light source optical fiber; The fiber optic tube is used to set up the video fiber optic transmission for the image at the first end of the operation segment. The infusion tube is used to infuse physiological saline into the first end of the operating section.

2. The suction device for treating grade 3-4 vena cava tumor thrombi according to claim 1, characterized in that: The cutting section includes a shaftless motor and a cutting impeller mounted on the shaftless motor. The shaftless motor is fixedly installed between the end face of the first end and the port of the negative pressure inlet pipe.

3. A suction device for treating grade 3-4 vena cava tumor thrombi according to claim 2, characterized in that: The suction device also includes a position adjustment device and a bending controller. The position adjustment device includes a bending section and a bending controller. The first end of the bending section is connected to the operating section and the second end is connected to the first end of the flexible mirror body. The bending section is used to bend under the control of the bending controller to adjust the end angle.

4. A suction device for treating grade 3-4 vena cava aneurysms according to claim 3, characterized in that, It also includes a handle, which is connected to the second end of the flexible mirror body, and the bending controller is disposed on the handle.

5. A suction device for treating grade 3-4 vena cava tumor thrombi according to claim 4, characterized in that: The handle is equipped with a motor switch, which is used to control the shaftless motor.

6. A suction device for treating grade 3-4 vena cava tumor thrombi according to claim 1, characterized in that: The cutting section includes a support frame, a micro servo motor, and a cutting tool; the support frame is fixed inside the operating section, the micro servo motor is fixed on the support frame, and the cutting tool is fixed to the power output end of the micro servo motor.

7. A suction device for treating grade 3-4 vena cava aneurysms according to claim 6, characterized in that: The cutting section also includes a cover plate and a plurality of cutting edges disposed on the surface of the cover plate, the cover plate being disposed on the side of the cutting tool away from the micro servo motor.

8. A suction device for treating grade 3-4 vena cava tumor thrombi according to claim 7, characterized in that: The radius of the cutting edge is greater than the length from the edge of the cover disk to the center.

9. A suction device for treating grade 3-4 vena cava tumor thrombi according to claim 8, characterized in that: The end face of the first end of the operating segment is an inclined plane with a preset angle, the angle being the angle between the end face and the axis perpendicular to the center of the operating segment.

10. A suction device for treating grade 3-4 vena cava tumor thrombi according to claim 1, characterized in that: The first end of the operating section is also provided with a front cover, which is detachably connected to the first end of the operating section.

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