Ultrasonic aspirator and liver transplantation device

Abstract

The invention discloses an ultrasonic aspirator and a liver transplantation device.The ultrasonic aspirator comprises a main body, an ultrasonic tube, a sheathing canal and a mutual exclusion assembly, the main body is provided with a first negative pressure channel and a first liquid inlet channel, the first negative pressure channel is used for being communicated with a negative pressure aspirator, and the first liquid inlet channel is used for being communicated with an external liquid source; one end of the ultrasonic tube is connected to the main body and is provided with a second negative pressure channel which is communicated with the first negative pressure channel; the first sheathing canal is connected to the main body and sleeves the ultrasonic tube, a second liquid inlet channel is formed between the sheathing canal and the ultrasonic tube at an interval, the second liquid inlet channel is communicated with the first liquid inlet channel, and an annular liquid outlet is formed between the other end of the sheathing canal and the ultrasonic tube; the mutual exclusion assembly comprises a first magnetic part and a second magnetic part, the first magnetic part is annularly arranged at the other end of the sheathing canal, the second magnetic part is annularly arranged at the part, corresponding to the other end of the sheathing canal, of the ultrasonic tube, and the second magnetic part and the first magnetic part are opposite and mutually exclusive at intervals, so that the liquid outlet is in a preset state.

Description

Technical Field

[0001] This invention relates to the field of surgical ultrasonic scalpel technology, and particularly to ultrasonic aspirators and liver transplantation devices. Background Technology

[0002] The liver parenchyma is composed of soft hepatocytes, while the vascular and bile duct systems are encased in a tough connective tissue sheath. There is an order-of-magnitude difference in their mechanical strength. Therefore, when an ultrasound probe vibrates longitudinally at a high frequency of approximately 24,000 Hz, it generates a tiny amplitude of 60-100 micrometers. When this vibration is transmitted to the tissue, it creates a physical phenomenon called "selective tissue disintegration." Hepatocytes undergo intracellular water vaporization and cell membrane rupture under vibration, and are emulsified by the ultrasonic aspirator and removed under negative pressure. The vascular structures, with their collagen and elastic fibers, effectively absorb and disperse the vibrational energy, thus maintaining their structural integrity. This separation of hepatocytes from the vascular and bile duct structures allows the blood vessels and bile ducts to be exposed in the surgical field, facilitating the closure of these vessels and ducts, or enabling extracorporeal perfusion of the liver to form a separate extracorporeal circulation, thus preserving liver viability and facilitating liver transplantation.

[0003] In related technologies, ultrasonic aspirators have a sheath and an ultrasonic tube. The gap between the sheath and the ultrasonic tube forms a water inlet channel, allowing external water to enter. The water flows over the surface of the ultrasonic tube, increasing lubrication between the tube and tissue and preventing adhesion. Simultaneously, it lowers the temperature of the ultrasonic tube and irrigates the surgical field. However, when the ultrasonic aspirator enters the body, tissue compression can alter the gap between the sheath and the ultrasonic tube, affecting the water's coverage of the tube surface. This results in water not reaching certain areas of the tube's surface, where the ultrasonic tube is prone to adhesion to tissue, hindering the surgical progress.

[0004] Furthermore, because ultrasonic aspirators require flushing and negative pressure suction, water often remains at the tip, making it difficult to position the endoscope at the probe location. Generally, medical staff need to use a separate endoscope to observe the surgical field. If a medical staff member holds the ultrasonic aspirator in one hand and the endoscope in the other, it affects their operational precision and poses surgical risks (although ultrasonic aspirators can reduce damage to the tubing, prolonged contact between the aspirator and the tubing can still damage it). If other personnel hold the endoscope to assist the surgeon, it severely tests the coordination between medical staff and also carries surgical risks. When the endoscope is integrated into the sheath, its weight significantly affects the size of the water inlet channel between the sheath and the ultrasonic tube, thus impacting the use of the ultrasonic aspirator. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an ultrasonic aspirator that can ensure effective water flow coverage and improve surgical efficiency.

[0006] A liver transplantation device with the aforementioned ultrasonic aspirator is also proposed.

[0007] According to a first aspect of the present invention, an ultrasonic aspirator includes: a main body having a first negative pressure channel and a first liquid inlet channel, wherein the first negative pressure channel is used to communicate with a negative pressure aspirator and the first liquid inlet channel is used to communicate with an external liquid source; An ultrasonic tube, one end of which is connected to the main body, and has a second negative pressure channel, which is used to connect to the first negative pressure channel; A sheath is first connected to the main body and sleeved on the ultrasonic tube. A second liquid inlet channel is formed between the sheath and the ultrasonic tube. The second liquid inlet channel is connected to the first liquid inlet channel. An annular liquid outlet is formed between the other end of the sheath and the ultrasonic tube. The mutual exclusion component includes a first magnetic element and a second magnetic element. The first magnetic element is arranged in a ring at the other end of the sheath, and the second magnetic element is arranged in a ring at the portion of the ultrasonic tube corresponding to the other end of the sheath. The second magnetic element and the first magnetic element are opposite to each other and mutually exclusive, so that the liquid outlet is in a preset state.

[0008] The ultrasonic aspirator according to the first aspect of the present invention has at least the following beneficial effects: By incorporating mutually exclusive components, including a first magnetic element and a second magnetic element, with the first magnetic element ring-shaped at one end of the sheath and the second magnetic element ring-shaped at the corresponding end of the ultrasonic tube, the design ensures a stable gap between the sheath and the ultrasonic tube. Even when the ultrasonic aspirator is compressed by tissue inside the body, the outlet remains in a preset state, ensuring a stable water flow covering the surface of the ultrasonic tube. This not only enhances the lubrication between the ultrasonic tube and the tissue, effectively preventing adhesion, but also reduces the temperature of the ultrasonic tube and irrigates the surgical field, providing a strong guarantee for the smooth progress of the surgery. Simultaneously, this design improves surgical efficiency, reduces surgical interruptions or repetitive procedures due to instrument problems, and further enhances the safety and success rate of the surgery.

[0009] According to some embodiments of the present invention, the first magnetic element forms a first projection on the outer peripheral surface of the ultrasonic tube, and the second magnetic element forms a second projection on the outer peripheral surface of the ultrasonic tube. The second magnetic element satisfies the following condition: when the ultrasonic tube vibrates along the axial direction of the ultrasonic tube, the second projection is located within the first projection.

[0010] According to some embodiments of the present invention, the dimension of the first projection along the axial direction of the ultrasonic tube is L1, the dimension of the second projection along the axial direction of the ultrasonic tube is L2, and the ultrasonic aspirator satisfies: L1≥3L2.

[0011] According to some embodiments of the present invention, the first magnetic element includes a ring magnet or a plurality of sub-magnets distributed sequentially along the circumference of the sheath.

[0012] According to some embodiments of the present invention, an endoscope is also included, which passes through the body and the sheath and is movable along the axial direction of the ultrasonic tube.

[0013] According to some embodiments of the present invention, the endoscope includes at least two sets of endoscopes, the two endoscopes being distributed circumferentially at intervals along the sheath.

[0014] According to some embodiments of the present invention, the sheath includes a column portion and at least two sets of protrusions, the protrusions being disposed on the outer peripheral surface of the column portion, the protrusions corresponding to the lens element, and the lens element passing through the corresponding protrusion.

[0015] According to some embodiments of the present invention, the ultrasonic tube is detachably connected to the main body.

[0016] According to some embodiments of the present invention, the sheath is detachably connected to the body.

[0017] A liver transplantation device according to a second aspect of the present invention includes the ultrasonic aspirator described in the first aspect embodiment.

[0018] The liver transplant device according to the second aspect of the present invention has at least the following beneficial effects: by using the ultrasonic aspirator in the first aspect embodiment, the water ingress coverage rate can be improved, thereby improving surgical efficiency.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of an ultrasonic aspirator according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a partial cross-sectional structure of an ultrasonic aspirator according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of an ultrasonic aspirator according to an embodiment of the present invention; Figure 4This is a schematic diagram of the endoscope extending from an ultrasonic aspirator according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the sheath and ultrasonic tube in an ultrasonic aspirator according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the sheath and ultrasonic tube in an ultrasonic aspirator according to an embodiment of the present invention; Figure 7 for Figure 6 A magnified view of part A in the diagram.

[0021] Icon labels: Main body 100; First negative pressure channel 110; First liquid inlet channel 120; Ultrasonic tube 200; Second negative pressure channel 210; Sheath 300; Second liquid inlet channel 310; Column 320; Protrusion 330; Mutual exclusion component 400; first magnetic component 410; second magnetic component 420; Endoscope 500. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 limiting this invention.

[0024] In the description of this invention, "several" refers to one or more, and "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this invention, unless otherwise explicitly defined, terms such as setting, installing, and connecting should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0026] Reference Figures 1 to 7As shown, the ultrasonic aspirator according to the first aspect of the present invention includes a main body 100, an ultrasonic tube 200, a sheath 300, and a mutual exclusion component 400.

[0027] In this embodiment, the main body 100 is used for the user to hold and control the direction of the ultrasonic aspirator. The main body 100 has a first negative pressure channel 110 and a first liquid inlet channel 120. The first negative pressure channel 110 is used to connect to a negative pressure aspirator, such as a vacuum pump. The first liquid inlet channel 120 is used to connect to an external liquid source, such as a water source or a saline source. A liquid pump is generally provided between the first liquid inlet channel 120 and the liquid source. The liquid pump is used to actively draw liquid into the first liquid inlet channel 120.

[0028] One end of the ultrasonic tube 200 is connected to the main body 100 and can transmit ultrasonic vibrations emitted by the ultrasonic structure inside the main body 100 to generate ultrasonic vibrations along the axial direction of the ultrasonic tube 200. It also has a second negative pressure channel 210, which is used to connect to the first negative pressure channel 110. Specifically, the ultrasonic tube 200 vibrates by ultrasonic vibrations generated by piezoelectric ceramics, and the ultrasonic tube 200 vibrates along the axial direction of the ultrasonic tube 200 to remove target tissue without damaging blood vessels, bile ducts, or other tubular structures. The ultrasonic tube 200 is a hollow tube, and the hollow part forms the second negative pressure channel 210. The second negative pressure channel 210 is connected to the first negative pressure channel 110, so that the negative pressure aspirator can directly remove liquid and broken tissue through the ultrasonic tube 200 to clear the surgical field in a timely manner and maintain an open surgical field.

[0029] The sheath 300 is first connected to the main body 100 and sleeved on the ultrasonic tube 200. A second liquid inlet channel 310 is formed between the sheath 300 and the ultrasonic tube 200. The second liquid inlet channel 310 is connected to the first liquid inlet channel 120. The other end of the sheath 300 and the ultrasonic tube 200 form an annular liquid outlet. Specifically, the gap between the sheath 300 and the ultrasonic tube 200 is used to contain liquid. After the liquid fills the gap between the sheath 300 and the ultrasonic tube 200, the liquid can evenly cover the outer surface of the ultrasonic tube 200 from the liquid outlet, so that the surface of the ultrasonic tube 200 can be kept lubricated.

[0030] Specifically, the end of the ultrasonic tube 200 away from the main body 100 has the following structure from the inside to the outside: negative pressure channel - the tube body of the ultrasonic tube 200 - liquid attached to the outer surface of the ultrasonic tube 200; due to the existence of the negative pressure channel, the liquid will automatically move towards the negative pressure channel and carry the tissue into the negative pressure channel together, so that the liquid and broken tissue are less likely to remain in the human body, thus improving the quality of surgery.

[0031] The mutual repulsion assembly 400 includes a first magnetic element 410 and a second magnetic element 420. The first magnetic element 410 is arranged in a ring at the other end of the sheath 300, and the second magnetic element 420 is arranged in a ring at the portion of the ultrasonic tube 200 corresponding to the other end of the sheath 300. The second magnetic element 420 and the first magnetic element 410 are opposite to each other and mutually repulsive, so that the liquid outlet is in a preset state. Specifically, the preset state means that the interval between the ultrasonic tube 200 and the sheath 300 remains at a preset size, so that the liquid outlet is a ring of basically uniform size. This allows the liquid to flow evenly from the liquid outlet to the surface of the ultrasonic tube 200. In this embodiment, the first magnetic element 410 and the second magnetic element 420 are ferrite magnets.

[0032] It is understandable that by setting up a mutually exclusive component 400, including a first magnetic element 410 and a second magnetic element 420, with the first magnetic element 410 arranged in a ring at the other end of the sheath 300 and the second magnetic element 420 arranged in a ring at the portion of the ultrasonic tube 200 corresponding to the other end of the sheath 300, the two are opposite to each other and mutually exclusive. This design ensures that the gap between the sheath 300 and the ultrasonic tube 200 is stable. Even when the ultrasonic aspirator is squeezed by tissue inside the body, the outlet remains in a preset state, thus ensuring that the water flow can stably cover the surface of the ultrasonic tube 200. This not only enhances the lubrication between the ultrasonic tube 200 and the tissue, effectively preventing the ultrasonic tube 200 from adhering to the tissue, but also reduces the temperature of the ultrasonic tube 200 and rinses the surgical field, providing a strong guarantee for the smooth progress of the surgery. At the same time, this design also improves surgical efficiency, reduces surgical interruptions or repetitive operations caused by instrument problems, and further improves the safety and success rate of the surgery.

[0033] Reference Figure 7 As shown, in some specific embodiments of the present invention, the first magnetic element 410 forms a first projection on the outer peripheral surface of the ultrasonic tube 200, and the second magnetic element 420 forms a second projection on the outer peripheral surface of the ultrasonic tube 200. The second magnetic element 420 satisfies the following condition: when the ultrasonic tube 200 vibrates along the axial direction of the ultrasonic tube 200, the second projection is located within the first projection.

[0034] Specifically, during the vibration of the ultrasonic tube 200, the second magnetic element 420 will not exceed the coverage area of ​​the first magnetic element 410, thereby ensuring the stability and effectiveness of the repulsive force. If the projection of the second magnetic element 420 exceeds the projection of the first magnetic element 410 when the ultrasonic tube 200 vibrates, it may lead to uneven distribution of the repulsive force, or even localized failure, thus affecting the stability of the gap between the sheath 300 and the ultrasonic tube 200. The design in this embodiment effectively avoids this problem, ensuring that the ultrasonic aspirator maintains stable performance under various operating conditions.

[0035] In this embodiment, both the first projection and the second projection are radial projections along the ultrasonic tube 200. The projections of the first magnetic element 410 and the second magnetic element 420 are both toroidal. The second projection is always within the projection range of the first projection. The first magnetic element 410 and the second magnetic element 420 are always opposite to each other and spaced apart, maintaining the stability of the repulsive force between them. Specifically, the like poles of the first magnetic element 410 and the second magnetic element 420 repel each other; that is, the N pole of the first magnetic element 410 is opposite to and spaced apart from the N pole of the second magnetic element 420, or the S pole of the first magnetic element 410 is opposite to and spaced apart from the S pole of the second magnetic element 420.

[0036] Reference Figure 7 As shown, in some specific embodiments of the present invention, the dimension of the first projection along the axial direction of the ultrasonic tube 200 is L1, the dimension of the second projection along the axial direction of the ultrasonic tube 200 is L2, and the ultrasonic aspirator satisfies: L1≥3L2.

[0037] Specifically, during the vibration of the ultrasonic tube 200, the second magnetic component 420 remains within the stable repulsive range of the first magnetic component 410, avoiding changes in the repulsive force caused by vibration, thereby ensuring the stability of the gap between the sheath 300 and the ultrasonic tube 200. When L1 is less than 3L2, with the vibration of the ultrasonic tube 200, the second magnetic component 420 may partially or completely leave the repulsive range of the first magnetic component 410, leading to gap changes and affecting the water flow coverage effect. The size design in this embodiment effectively avoids this problem, improving the reliability and stability of the ultrasonic aspirator. In addition, this size design also considers the convenience of manufacturing and assembly, making it easier to install and adjust the first magnetic component 410 and the second magnetic component 420, reducing production costs. In this embodiment, L1 is at least 0.5 mm.

[0038] Reference Figure 7 As shown, in some specific embodiments of the present invention, the first magnetic element 410 includes a ring magnet or a plurality of sub-magnets distributed sequentially along the circumference of the sheath 300.

[0039] Specifically, using a ring magnet provides a uniform and stable repulsive force, ensuring that the gap between the sheath 300 and the ultrasonic tube 200 remains consistent in all directions. While using multiple individual magnets distributed circumferentially along the sheath 300 may result in relatively smaller repulsive forces from each individual magnet, the combined effect of multiple magnets can still achieve a stable gap. Furthermore, the design of the individual magnets offers flexibility, allowing for adjustments to their number and distribution to suit different surgical scenarios. In practical applications, the appropriate magnetic component type can be selected based on specific needs and cost considerations.

[0040] Reference Figure 1and Figure 4 As shown, in some specific embodiments of the present invention, an endoscope 500 is also included, which passes through the body 100 and the sheath 300 and is movable along the axial direction of the ultrasonic tube 200.

[0041] It should be noted that in the relevant technology, when the endoscope 500 is installed in the sheath 300, the weight of the endoscope 500 itself and the movement of the endoscope 500 can cause instability in the size of the inlet. Therefore, it is difficult to integrate the endoscope 500 into the ultrasonic aspirator. Medical staff usually use a separate endoscope 500 and a separate ultrasonic aspirator, which is quite inconvenient.

[0042] In this embodiment, by inserting the endoscope 500 through the main body 100 and the sheath 300, and enabling it to move along the axial direction of the ultrasonic tube 200, not only is the endoscope 500 integrated with the ultrasonic aspirator, but the influence of the endoscope 500's own weight and movement on the inlet size is also avoided. Specifically, the movement of the endoscope 500 does not interfere with the stability of the gap between the sheath 300 and the ultrasonic tube 200, thus ensuring that the water flow can stably cover the surface of the ultrasonic tube 200, providing a strong guarantee for the smooth progress of the surgery. At the same time, this integrated design also improves the ease of use of surgical instruments and reduces the workload of medical staff. In this embodiment, the range of movement of the endoscope 500 can be set according to actual needs to meet the requirements of different surgical scenarios. In addition, the endoscope 500's body material and imaging quality must also meet the surgical requirements to ensure that medical staff can clearly observe the surgical field.

[0043] Reference Figure 4 As shown, in some specific embodiments of the present invention, the endoscope 500 includes at least two sets of endoscopes, which are distributed circumferentially along the sheath 300.

[0044] Specifically, the design employing at least two sets of endoscopes spaced circumferentially along the sheath 300° expands the observation range of the endoscope 500 and reduces blind spots. During surgery, medical personnel need a comprehensive and clear view of the surgical field to accurately determine surgical progress and operation location. However, an endoscope 500 with only one set of endoscopes may have a limited observation range, failing to meet the needs of complex surgical scenarios. The design in this embodiment achieves omnidirectional observation of the surgical field through the synergistic effect of multiple sets of endoscopes, improving the accuracy and safety of the surgery. Simultaneously, this design enhances the flexibility and adaptability of the endoscope 500, enabling it to better cope with the challenges of different surgical scenarios. In practical applications, the number and distribution of endoscopes can be adjusted according to specific needs to obtain the best observation results.

[0045] Reference Figure 5As shown, in some specific embodiments of the present invention, the sheath 300 includes a column portion 320 and at least two sets of protrusions 330. The protrusions 330 are disposed on the outer peripheral surface of the column portion 320 and correspond to the lens element. The lens element passes through the corresponding protrusion 330.

[0046] Specifically, this structural design of the sheath 300 provides stable support and a suitable mounting position for the endoscope 500's components. The protrusion 330 corresponds to the component, allowing for precise insertion and ensuring the endoscope 500's fixation and stability within the sheath 300. Simultaneously, the combined design of the column 320 and the protrusion 330 enhances the overall strength and rigidity of the sheath 300, enabling it to better withstand various pressures and manipulations during surgery. Furthermore, this design facilitates the manufacturing and processing of the sheath 300, reducing production costs. In practical applications, the number and size of the protrusions 330 can be rationally designed according to the number and size of the endoscope 500's components to ensure a perfect match between the endoscope 500 and the sheath 300. Moreover, the surface of the protrusions 330 can be smoothed to reduce irritation and damage to surrounding tissues, improving surgical safety and comfort.

[0047] In this embodiment, the column portion 320 is a cylindrical portion 320, the protrusion portion 330 is an arc-shaped protrusion, and the column portion 320 and the protrusion portion 330 smoothly transition to form an elliptical sheath 300.

[0048] In some specific embodiments of the present invention, the ultrasonic tube 200 is detachably connected to the main body 100.

[0049] Specifically, the ultrasonic tube 200 is detachably connected to the main body 100, greatly facilitating the maintenance and replacement of the ultrasonic aspirator. During surgery, the ultrasonic tube 200, as a key component directly acting on the target tissue, may wear or be damaged due to prolonged use or improper operation. If the ultrasonic tube 200 and the main body 100 were an integral design, the entire ultrasonic aspirator might need to be replaced if the ultrasonic tube 200 malfunctions, increasing costs and potentially affecting the smooth progress of the surgery. The detachable connection design in this embodiment allows medical personnel to quickly remove the ultrasonic tube 200 from the main body 100 and replace it with a new one, ensuring the continuity and safety of the surgery. This design also facilitates cleaning and disinfection of the ultrasonic aspirator, reducing the risk of cross-infection and improving surgical safety. In practical applications, the detachable connection can employ various forms such as threaded connections and snap-fit ​​connections to ensure the stability and reliability of the connection.

[0050] In addition, different surgeries require ultrasound tubes 200 of different sizes and specifications. The ultrasound tube 200 is detachably connected to the main body 100, making it easier to replace the ultrasound tube 200.

[0051] In some specific embodiments of the present invention, the sheath 300 is detachably connected to the body 100.

[0052] Specifically, the sheath 300 is detachably connected to the main body 100, further enhancing the flexibility and practicality of the ultrasonic aspirator. During surgery, the sheath 300, as a crucial component protecting the ultrasonic tube 200 and guiding fluid flow, may need replacement due to surgical requirements or prolonged use. If the sheath 300 were fixedly connected to the main body 100, replacing the sheath 300 would be extremely difficult, potentially even requiring the replacement of the entire ultrasonic aspirator. The detachable connection design in this embodiment allows medical personnel to easily detach the sheath 300 from the main body 100 and replace it with a new one, depending on surgical needs or the sheath's wear condition. This not only improves surgical efficiency but also reduces operating costs. Furthermore, this design facilitates individual cleaning and disinfection of the sheath 300, ensuring hygiene and safety during surgery. In practical applications, the detachable connection between the sheath 300 and the main body 100 can also employ various methods such as threaded connections or snap-fit ​​connections to ensure the stability and reliability of the connection.

[0053] In some specific embodiments of the present invention, the liver transplant device according to the second aspect of the present invention includes the ultrasonic aspirator of the first aspect of the present invention. It is understood that using the ultrasonic aspirator of the first aspect of the present invention in the liver transplant device can improve the fluid ingress coverage rate, thereby improving surgical efficiency.

[0054] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An ultrasonic aspirator, characterized in that, include: The main body has a first negative pressure channel and a first liquid inlet channel. The first negative pressure channel is used to connect to a negative pressure suction device, and the first liquid inlet channel is used to connect to an external liquid source. An ultrasonic tube, one end of which is connected to the main body, and has a second negative pressure channel, which is used to connect to the first negative pressure channel; A sheath is first connected to the main body and sleeved on the ultrasonic tube. A second liquid inlet channel is formed between the sheath and the ultrasonic tube. The second liquid inlet channel is connected to the first liquid inlet channel. An annular liquid outlet is formed between the other end of the sheath and the ultrasonic tube. The mutual exclusion component includes a first magnetic element and a second magnetic element. The first magnetic element is arranged in a ring at the other end of the sheath, and the second magnetic element is arranged in a ring at the portion of the ultrasonic tube corresponding to the other end of the sheath. The second magnetic element and the first magnetic element are opposite to each other and mutually exclusive, so that the liquid outlet is in a preset state.

2. The ultrasonic aspirator according to claim 1, characterized in that: The first magnetic element forms a first projection on the outer peripheral surface of the ultrasonic tube, and the second magnetic element forms a second projection on the outer peripheral surface of the ultrasonic tube. The second magnetic element satisfies the following condition: when the ultrasonic tube vibrates along its axial direction, the second projection is located within the first projection.

3. The ultrasonic aspirator according to claim 2, characterized in that: The first projection has a dimension L1 along the axial direction of the ultrasonic tube, and the second projection has a dimension L2 along the axial direction of the ultrasonic tube. The ultrasonic aspirator satisfies the condition that L1 ≥ 3L2.

4. The ultrasonic aspirator according to claim 1, characterized in that: The first magnetic element includes a ring magnet or a plurality of sub-magnets distributed sequentially along the circumference of the sheath.

5. The ultrasonic aspirator according to claim 1, characterized in that: It also includes an endoscope that passes through the body and the sheath and is movable along the axis of the ultrasonic tube.

6. The ultrasonic aspirator according to claim 5, characterized in that: The endoscope includes at least two sets of mirror elements, which are distributed circumferentially along the sheath.

7. The ultrasonic aspirator according to claim 6, characterized in that: The sheath includes a column and at least two sets of protrusions. The protrusions are located on the outer peripheral surface of the column and correspond to the lens element. The lens element passes through the corresponding protrusion.

8. The ultrasonic aspirator according to claim 1, characterized in that: The ultrasonic tube is detachably connected to the main body.

9. The ultrasonic aspirator according to claim 1, characterized in that: The sheath is detachably connected to the main body.

10. A liver transplant device, characterized in that: Includes the ultrasonic aspirator according to any one of claims 1 to 9.

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