Adjustable tumor specimen fetching device for neurosurgery department

Abstract

The invention discloses an adjustable neurosurgery tumor specimen fetching device, which belongs to the field of medical instruments and comprises an operating rod, and a first channel is arranged in the operating rod; the object taking mechanism comprises a pull rod and an object taking bag connected with the pull rod, the pull rod penetrates through the first channel, and the object taking bag protrudes out of the operating rod; the clamping assembly is arranged on the operating rod, detachably connected with the pull rod in a clamping mode and used for limiting the pull rod so that the pull rod can be locked in a one-way mode; the suction assembly is arranged in the operating rod, is communicated with a suction air source through a connecting assembly and is used for sucking fine tissues and tissue fluid; and the auxiliary assembly is arranged on the operating rod and used for assisting a user in grabbing the device. The fetching mechanism can adapt to tumor specimens of different sizes, frequent instrument replacement is avoided, and the complexity of the operation process and the risk of tumor cell diffusion are reduced.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically, to an adjustable neurosurgical tumor specimen retrieval device. Background Technology

[0002] In neurosurgical tumor surgery, the accurate and safe removal of tumor specimens is one of the key aspects of the operation, which is directly related to the accuracy of pathological diagnosis and affects the risk of postoperative tumor recurrence and patient prognosis. During the operation, it is necessary not only to remove the large pieces of tumor tissue after resection, but also to collect all the small tissue fragments and tissue fluid scattered in the surgical field. At the same time, it is necessary to prevent tumor cells from spreading to normal brain tissue and reduce damage to important structures such as surrounding nerves and blood vessels.

[0003] Currently, existing instruments used for neurosurgical tumor specimen retrieval suffer from limitations in functionality and coordination. Some instruments can only remove large tissues and cannot effectively collect small tissues and tissue fluids, resulting in incomplete specimen collection and affecting the comprehensiveness of pathological diagnosis. Although some instruments have aspiration functions, they lack integrated design with the retrieval function, requiring frequent instrument replacements, which increases the complexity of the surgical procedure and the risk of tumor cell spread. Summary of the Invention

[0004] In view of the problems of limited functionality and poor coordination of existing instruments for obtaining neurosurgical tumor specimens, the present invention aims to provide an adjustable neurosurgical tumor specimen extraction device.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] An adjustable neurosurgical tumor specimen retrieval device, comprising:

[0007] An operating lever, wherein a first channel is provided inside the operating lever;

[0008] The object retrieval mechanism includes a pull rod and an object retrieval bag connected to the pull rod, the pull rod passing through the first channel and the object retrieval bag protruding from the operating rod;

[0009] A locking assembly is disposed on the operating lever and detachably engaged with the pull rod, used to limit the pull rod so that it is locked in one direction;

[0010] A suction assembly, which is disposed in the operating rod and connected to the suction air source through a connecting assembly, is used to suction small tissues and tissue fluid;

[0011] An auxiliary component, which is mounted on the control lever, is used to assist the user in grasping the device.

[0012] Optionally, an elastic coil is fixedly installed on the pull rod, and the retrieval bag is disposed on the elastic coil.

[0013] Optionally, the operating lever is provided with a guide ring, and the guide ring is provided with a conical guide groove on the side facing the retrieval bag to reduce the friction when the retrieval bag is pulled.

[0014] Optionally, the locking assembly includes a mounting bracket fixedly mounted on the operating lever, a locking plate rotatably mounted on the mounting bracket, a plurality of evenly distributed locking slots on the pull rod, a guide rod fixedly mounted on the operating lever, the locking plate slidably connected to the guide rod, a spring sleeved on the guide rod, and the two ends of the spring abutting against the operating lever and the locking plate respectively.

[0015] Optionally, the suction assembly includes a second channel formed on the operating lever, and a suction tube whose position is controlled by a drive assembly is disposed in the second channel.

[0016] Optionally, a set of rotating shafts is rotatably installed inside the suction tube, a sealing plate is fixedly installed on the rotating shafts, a spring is fixedly installed on the sealing plate, and the other end of the spring is fixedly connected to the inner wall of the suction tube.

[0017] Optionally, the drive assembly includes a fixed bracket fixedly mounted on the operating lever, a motor fixedly mounted on the fixed bracket, a gear fixedly mounted on the output shaft of the motor, a toothed groove that mates with the gear on the suction tube, and an external thread that is threadedly connected to the inner wall of the second channel on the suction tube.

[0018] Optionally, the connecting assembly includes a connecting pipe that communicates with a suction air source, the connecting pipe being rotatably connected to a suction pipe, a plurality of ball bearings being movably disposed inside the connecting pipe, and a sealing ring being disposed between the connecting pipe and the suction pipe.

[0019] Optionally, a collection assembly is provided on the connecting pipe, the collection assembly including a collection box fixedly installed on and communicating with the connecting pipe, and an elastic filter screen fixedly installed inside the connecting pipe, the elastic filter screen being hemispherical in shape.

[0020] Optionally, the auxiliary component includes a gripping ring slidably mounted on the operating lever, the gripping ring being threaded with a locking bolt, one end of the locking bolt abutting against the operating lever.

[0021] Compared with the prior art, the technical solution provided by this invention has at least the following beneficial effects:

[0022] In the above scheme, by setting up a retrieval mechanism, the retrieval mechanism provides a stable sliding channel for the pull rod through the first channel. The elastic coil has the characteristics of natural expansion and force contraction. In its initial state, it is in an expanded form, which can drive the retrieval bag to unfold to accommodate the tumor tissue. When the pull rod is pulled outward, the pull rod drives the elastic coil to contract through the traction force, thereby tightening the retrieval bag and firmly wrapping the tumor tissue in the bag, preventing the tissue from falling off during the retrieval process. Through the cooperation of mechanical traction and elastic element, the retrieval bag can be opened and closed flexibly. The operation is simple and the response is fast. It can adapt to tumor specimens of different sizes. At the same time, the flexible contraction of the elastic coil can reduce traction damage to the surrounding brain tissue.

[0023] By setting up a locking assembly, the mounting frame provides stable rotational support for the locking plate. The spring is always in a compressed state, and the elastic force pushes the locking plate towards the pull rod. Several evenly distributed slots on the pull rod are adapted to the locking end of the locking plate. When the pull rod pulls the retrieval bag to the target position, the locking plate is inserted into the corresponding slot under the thrust of the spring, forming a mechanical lock. This structure achieves unidirectional fixation of the pull rod through the elastic preload of the spring and the mechanical limiting of the slots, preventing it from retracting during the operation due to hand fatigue, accidental touch, or tissue tension. This ensures that the retrieval bag always remains in a tight state, avoids specimen loss, and improves the reliability and safety of the device operation.

[0024] By incorporating a suction assembly, the second channel provides an installation and movement pathway for the suction tube. As the core channel for negative pressure conduction, the position of the suction tube is precisely controlled by a drive assembly. This drive assembly moves the suction tube back and forth along the axis of the second channel, adjusting the position of the suction end within the surgical field. When small tissues or tissue fluid need to be aspirated, the drive assembly pushes the suction tube to the target area, bringing its suction end close to the specimen. After aspiration, the drive assembly retracts the suction tube back into the second channel, preventing it from interfering with the retrieval mechanism or damaging surrounding brain tissue. This adjustable suction tube position allows for flexible adaptation of the aspiration range, improving the efficiency of collecting small specimens from different locations within the surgical field, while avoiding interference with surgical procedures caused by a fixed-position suction tube. Attached Figure Description

[0025] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a cross-sectional view of the operating lever of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the card slot assembly of the present invention;

[0029] Figure 4 This is a schematic diagram of the guide ring structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the suction assembly of the present invention;

[0031] Figure 6 This is a schematic diagram illustrating the fit between the sealing plate and the spring sheet of the present invention;

[0032] Figure 7 This is a schematic diagram of the suction assembly of the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the components used in this invention;

[0034] Figure 9 This is a schematic diagram of the structure of the auxiliary component of the present invention.

[0035] [Figure Labels]

[0036] 10. Control lever;

[0037] 20. Retrieval mechanism; 21. First channel; 22. Pull rod; 23. Elastic coil; 24. Retrieval bag; 25. Guide ring;

[0038] 30. Positioning assembly; 31. Mounting bracket; 32. Clamping plate; 33. Guide rod; 34. Spring; 35. Slot;

[0039] 40. Suction assembly; 41. Second channel; 42. Suction tube; 43. Rotary shaft; 44. Sealing plate; 45. Spring;

[0040] 50. Connecting assembly; 51. Connecting pipe; 52. Ball bearing; 53. Sealing ring;

[0041] 60. Collection component; 61. Collection box; 62. Flexible filter;

[0042] 70. Drive assembly; 71. Threaded groove; 72. Toothed groove; 73. Mounting bracket; 74. Motor; 75. Gear;

[0043] 80. Auxiliary components; 81. Grip ring; 82. Locking bolt.

[0044] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should also be noted that, to make the embodiments more comprehensive, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0046] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0047] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0048] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0049] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0050] like Figures 1 to 9As shown, this embodiment of the invention provides an adjustable neurosurgical tumor specimen retrieval device, including an operating rod 10 with a first channel 21 inside; a retrieval mechanism 20, including a pull rod 22 and a retrieval bag 24 connected to the pull rod 22, the pull rod 22 passing through the first channel 21 and the retrieval bag 24 protruding from the operating rod 10; a locking assembly 30, which is disposed on the operating rod 10 and detachably locked to the pull rod 22, for limiting the pull rod 22 to one-way locking; a suction assembly 40, which is disposed in the operating rod 10 and connected to a suction air source through a connecting assembly 50, for suctioning small tissues and tissue fluid; and an auxiliary assembly 80, which is disposed on the operating rod 10 to assist the user in grasping the device.

[0051] This device uses the operating rod 10 as the core supporting structure, and the retrieval mechanism 20 directly acts on the removed tumor tissue to achieve the physical removal of large or complete specimens.

[0052] The locking component 30 secures the key transmission components of the retrieval mechanism 20 through mechanical limiting, preventing the specimen from falling off or retrieval failure due to component retraction during operation.

[0053] The suction component 40 uses the negative pressure generated by the suction air source to accurately capture small tumor tissue fragments and tissue fluid, making up for the blind spots of the retrieval mechanism 20 in collecting small specimens.

[0054] The auxiliary component 80 optimizes the operator's grip and control feel of the device, improves operational stability, ensures the integrity of tumor specimen retrieval, and enables comprehensive collection of small tissues. At the same time, through the integrated design of the mechanical structure, it reduces the frequency of instrument replacement during neurosurgery, thereby reducing surgical trauma and the risk of tumor cell spread.

[0055] The device, through its retrieval mechanism 20, can accommodate tumor specimens of different sizes, avoiding frequent instrument changes and reducing the complexity of the surgical procedure and the risk of tumor cell spread.

[0056] Furthermore, an elastic coil 23 is fixedly installed on the pull rod 22, and the retrieval bag 24 is set on the elastic coil 23.

[0057] The first channel 21 provides a stable sliding channel for the pull rod 22. The elastic coil 23 has the characteristics of natural expansion and force contraction. In its initial state, it is in an expanded form, which can drive the retrieval bag 24 to unfold to accommodate the tumor tissue. When the pull rod 22 is pulled outward of the operating rod 10, the pull rod 22 drives the elastic coil 23 to contract through the traction force, thereby tightening the retrieval bag 24 and firmly wrapping the tumor tissue in the bag to prevent the tissue from falling off during the retrieval process. Through the cooperation of mechanical traction and elastic element, the retrieval bag 24 can be opened and closed flexibly. The operation is simple and the response is fast. It can adapt to tumor specimens of different sizes. At the same time, the flexible contraction of the elastic coil 23 can reduce the traction damage to the surrounding brain tissue.

[0058] The operating lever 10 is provided with a guide ring 25, and the guide ring 25 is provided with a conical guide groove on the side facing the retrieval bag 24 to reduce the friction when the retrieval bag 24 is pulled.

[0059] When the retrieval bag 24 is pulled back, it first contacts the large-diameter end of the conical guide groove. As the retrieval process progresses, it gradually moves towards the small-diameter end. The conical structure guides the retrieval bag 24 to contract and fold along a preset path, preventing the bag from twisting, getting stuck, or generating hard friction with the edge of the operating rod 10 during the retrieval process. By optimizing the retrieval trajectory of the retrieval bag 24, the friction between the bag and the instrument is significantly reduced, which reduces the risk of damage to the retrieval bag 24 and the pulling force required by the operator, improving the smoothness and safety of the operation. At the same time, it avoids the shedding and spread of tumor cells caused by friction.

[0060] The locking assembly 30 includes a mounting bracket 31 fixedly mounted on the operating lever 10, a locking plate 32 rotatably mounted on the mounting bracket 31, a plurality of evenly distributed locking slots 35 opened on the pull rod 22, a guide rod 33 fixedly mounted on the operating lever 10, the locking plate 32 and the guide rod 33 slidably connected, and a spring 34 sleeved on the guide rod 33, with the two ends of the spring 34 abutting against the operating lever 10 and the locking plate 32 respectively;

[0061] Mounting bracket 31 provides stable rotational support for clamping plate 32. Spring 34 is always in a compressed state, pushing clamping plate 32 towards pull rod 22 through elastic force. Several evenly distributed slots 35 on pull rod 22 are adapted to the engaging end of clamping plate 32. When pull rod 22 pulls retrieval bag 24 to tighten to the target position, clamping plate 32 is embedded in the corresponding slot 35 under the pushing force of spring 34, forming a mechanical lock. This structure achieves unidirectional fixation of pull rod 22 through elastic pre-tension of spring 34 and mechanical limiting of slot 35, preventing it from retracting during operation due to hand fatigue, accidental touch or tissue tension, ensuring that retrieval bag 24 always remains tightened, avoiding specimen drop, and improving the reliability and safety of device operation.

[0062] The suction assembly 40 includes a second channel 41 opened on the operating lever 10, and a suction tube 42 whose position is controlled by the driving assembly 70 is provided in the second channel 41.

[0063] The second channel 41 provides an installation and movement channel for the suction tube 42. As the core channel for negative pressure conduction, the position of the suction tube 42 is precisely controlled by the drive component 70. The drive component 70 can drive the suction tube 42 to move back and forth along the axis of the second channel 41, thereby adjusting the position of the suction end of the suction tube 42 in the surgical field. When it is necessary to aspirate small tissues or tissue fluid, the drive component 70 pushes the suction tube 42 to the target area, so that its suction end is close to the specimen to be aspirated. After aspiration, the drive component 70 retracts the suction tube 42 back into the second channel 41 to avoid interfering with the operation of the retrieval mechanism 20 or damaging the surrounding brain tissue. Through the adjustable position of the suction tube 42, the aspiration range can be flexibly adapted, improving the collection efficiency of small specimens in different locations in the surgical field, while avoiding interference of the fixed position suction tube 42 with the surgical operation.

[0064] A set of rotating shafts 43 are rotatably installed inside the suction tube 42. A sealing plate 44 is fixedly installed on the rotating shaft 43. A spring piece 45 is fixedly installed on the sealing plate 44. The other end of the spring piece 45 is fixedly connected to the inner wall of the suction tube 42.

[0065] The rotating shaft 43 provides a pivot point for the sealing plate 44. The sealing plate 44 and the spring 45 form a one-way conduction structure. The spring 45 is initially in a naturally extended state, pushing the sealing plates 44 to fit tightly together, thus sealing the suction tube 42. When negative pressure is activated, the suction force generated by the negative pressure overcomes the elastic force of the spring 45, causing the sealing plate 44 to rotate around the rotating shaft 43 into the suction tube 42, making the suction tube 42 channel open. Small tissues and tissue fluid are aspirated through the area of ​​the sealing plate 44 under the action of negative pressure. When suction stops or the negative pressure disappears, the spring 45 returns to its naturally extended state, pushing the sealing plate 44 to reset and reseal the suction tube 42. This effectively prevents the aspirated specimen from flowing back into the surgical field due to the disappearance of negative pressure or the movement of the device, avoiding the spread of tumor cells, while ensuring the sealing of the suction channel and improving the efficiency of negative pressure suction.

[0066] The drive assembly 70 includes a fixed frame 73 fixedly mounted on the operating lever 10, a motor 74 fixedly mounted on the fixed frame 73, a gear 75 fixedly mounted on the output shaft of the motor 74, a toothed groove 72 that mates with the gear 75 on the suction tube 42, and an external thread 71 that is threadedly connected to the inner wall of the second channel 41 on the suction tube 42.

[0067] The mounting bracket 73 provides stable support for the motor 74. The motor 74, as a power source, drives the gear 75 to rotate via its output shaft. The toothed groove 72 on the suction tube 42 meshes with the gear 75, and simultaneously, the threaded groove 71 on the suction tube 42 and the threaded structure on the inner wall of the second channel 41 form a threaded connection. When the motor 74 starts, the rotational motion of the gear 75 is converted into linear motion of the suction tube 42 through meshing transmission. The threaded groove 71 and the threaded engagement with the inner wall of the second channel 41 ensure smooth movement of the suction tube 42 along the axial direction without deviation or jamming. By controlling the forward and reverse rotation of the motor 74, the suction tube 42 can be pushed forward and retracted. Furthermore, the precise speed control characteristics of the motor 74 allow for fine-tuning of the position of the suction tube 42. This drive method is precise and responsive, accurately controlling the extension length and position of the suction tube 42, adapting to the operational needs of narrow surgical fields in neurosurgery, and improving the operational accuracy and convenience of the suction assembly 40.

[0068] The connecting assembly 50 includes a connecting pipe 51 that communicates with the suction air source. The connecting pipe 51 is rotatably connected to the suction pipe 42. A plurality of ball bearings 52 are movably disposed inside the connecting pipe 51. A sealing ring 53 is provided between the connecting pipe 51 and the suction pipe 42.

[0069] Furthermore, the proximal end of the connecting tube 51 and the suction tube 42 are rotatably connected by a rotary joint, and a sealing ring 53 is provided inside the rotary joint.

[0070] The connecting tube 51 serves as the connection medium between the suction tube 42 and the suction air source. The ball bearing 52 inside the connecting tube 51 can roll freely. When the suction tube 42 rotates, the ball bearing 52 facilitates the rotation between the two and prevents the air source end from rotating together. The sealing ring 53 can improve the airtightness of the connection, prevent leakage, and prevent contamination of the surgical environment.

[0071] A collection component 60 is provided on the connecting pipe 51. The collection component 60 includes a collection box 61 that is fixedly installed on and communicates with the connecting pipe 51. An elastic filter screen 62 is fixedly installed inside the connecting pipe 51. The elastic filter screen 62 is hemispherical.

[0072] The collection box 61 is connected to the connecting tube 51 to form a temporary specimen storage space. The elastic filter 62 inside the connecting tube 51 is hemispherical, with its curvature facing the suction tube 42, which increases the contact area between the filter and the suction airflow. When the suction assembly 40 is working, small tissues and tissue fluid pass through the connecting tube 51 with the airflow. The elastic filter 62, with its own filtration characteristics, intercepts solid specimens on the filter surface, while tissue fluid can be discharged through the filter pores, achieving solid-liquid separation. The hemispherical structure design allows the intercepted specimens to slide naturally into the collection box 61 under the action of gravity, avoiding specimen accumulation on the filter and blockage of the channel. This structure can efficiently collect and classify the aspirated small specimens, facilitating postoperative pathological examination of the specimens. At the same time, the flexibility of the elastic filter 62 can prevent the specimens from being squeezed and damaged during the filtration process, ensuring the integrity of the specimens.

[0073] The auxiliary component 80 includes a gripping ring 81 slidably mounted on the operating lever 10, and a locking bolt 82 is threadedly connected to the gripping ring 81, with one end of the locking bolt 82 abutting against the operating lever 10;

[0074] The grip ring 81 of the auxiliary component 80 is slidably sleeved on the operating rod 10. The operator can adjust the position of the grip ring 81 along the axis of the operating rod 10 according to their own hand size, surgical posture and surgical field position to find the most comfortable grip point. After the grip ring 81 is adjusted to the appropriate position, tighten the locking bolt 82 so that one end of the locking bolt 82 is tightly abutted against the surface of the operating rod 10. The position of the grip ring 81 is fixed by friction to prevent it from sliding during operation. This adapts to the usage habits of different operators, improves the grip comfort and operation stability of the device, reduces hand fatigue caused by long-term surgical operation, and the stable grip can reduce the risk of instrument injury caused by hand tremors, further improving the safety and accuracy of surgical operation.

[0075] The specific workflow of the technical solution provided by this invention is as follows:

[0076] During the surgery, a large piece of tumor tissue is first removed using the retrieval mechanism 20: the elastic coil 23 naturally expands, causing the retrieval bag 24 to unfold and be placed next to the tumor tissue. The operator pulls the lever 22 outward, causing it to slide along the first channel 21 and pull the elastic coil 23 to contract, so that the retrieval bag 24 encloses the tumor tissue. At this time, the locking plate 32 of the locking assembly 30, under the pushing force of the spring 34, slides along the guide rod 33 and embeds into the locking groove 35 of the lever 22. The lever 22 is limited and fixed by the support of the mounting bracket 31 to prevent it from retracting and ensure that the retrieval bag 24 is stably tightened. During the retrieval bag 24 recovery process, the conical guide groove of the guide ring 25 guides the bag body to fold smoothly, reducing friction damage.

[0077] For small tissue fragments and tissue fluid in the surgical field, the aspiration assembly 40 is activated: the motor 74 of the drive assembly 70 drives the gear 75 to rotate, the gear 75 meshes with the tooth groove 72 of the aspiration tube 42, and combined with the threaded engagement of the threaded groove 71 of the aspiration tube 42 and the second channel 41, the aspiration tube 42 is precisely pushed to the target area; the aspiration air source provides negative pressure to the aspiration tube 42 through the connecting pipe 51, and the sealing plate 44 inside the aspiration tube 42 rotates around the rotating shaft 43 under the action of negative pressure, compressing the spring 45 and opening the channel, so that the small specimen is aspirated.

[0078] After the aspirated specimen enters the connecting tube 51 with the airflow, the elastic filter 62 intercepts the solid specimen, causing it to slide into the collection box 61, thus achieving specimen collection and solid-liquid separation. After aspiration stops, the spring plate 45 pushes the sealing plate 44 to reset, sealing the aspiration tube 42 and preventing specimen backflow.

[0079] After specimen collection is completed, the locking plate 32 of the locking assembly 30 is released, and the pull rod 22 is retracted to retract the retrieval bag 24, allowing the large specimen to be removed; the collection box 61 is then unscrewed to obtain the small specimen, achieving complete collection of full-size specimens. The entire process, through the precise coordination of the mechanical structures, ensures both the convenience and stability of the surgical procedure, effectively preventing tumor cell spread and brain tissue damage, thus improving the efficiency and safety of neurosurgical tumor surgery.

[0080] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An adjustable neurosurgical tumor specimen extractor, comprising: The utility model provides a kind of medical device for taking small tissue and tissue fluid, including: Operating rod, first channel is arranged in the operating rod; Taking mechanism, the taking mechanism includes pull rod and the taking bag connected with the pull rod, the pull rod passes through the first channel, and the taking bag protrudes from the operating rod; The detent assembly is arranged on the operating rod and is detachably connected with the pull rod, for limiting the pull rod to be unidirectional locking; Suction assembly, the suction assembly is arranged in the operating rod and is communicated with suction air source by connecting assembly, for suctioning small tissue and tissue fluid; Auxiliary assembly, the auxiliary assembly is arranged on the operating rod, for assisting user to grasp the device.

2. The adjustable neurosurgical tumor specimen extractor of claim 1, wherein, The elastic coil is fixedly installed on the pull rod, and the taking bag is arranged on the elastic coil.

3. The adjustable neurosurgical tumor specimen extractor of claim 2, wherein, The operating rod is provided with a guide ring, and a tapered guide groove is arranged on the side of the guide ring towards the taking bag, for reducing the friction when the taking bag is pulled.

4. The adjustable neurosurgical tumor specimen extractor of claim 3, wherein, The detent assembly includes a mounting frame fixedly installed on the operating rod, a clamping plate rotatably installed on the mounting frame, a plurality of clamping grooves evenly distributed on the pull rod, a guide rod fixedly installed on the operating rod, the clamping plate and the guide rod being slidably connected, and a spring sleeved on the guide rod, the two ends of the spring being respectively abutted against the operating rod and the clamping plate.

5. The adjustable neurosurgical tumor specimen extractor of claim 4, wherein, The suction assembly includes a second channel opened on the operating rod, and a suction pipe arranged in the second channel and controlled in position by a driving assembly.

6. The adjustable neurosurgical tumor specimen extractor of claim 5, wherein, A plurality of rotating shafts are rotatably installed in the suction pipe, a sealing plate is fixedly installed on the rotating shaft, and an elastic sheet is fixedly installed on the sealing plate, the other end of the elastic sheet being fixedly connected with the inner wall of the suction pipe.

7. The adjustable neurosurgical tumor specimen extractor of claim 6, wherein, The driving assembly includes a fixed frame fixedly installed on the operating rod, a motor fixedly installed on the fixed frame, a gear fixedly installed on the output shaft of the motor, a tooth groove opened on the suction pipe and matched with the gear, and an external thread opened on the suction pipe and threadedly connected with the inner wall of the second channel.

8. The adjustable neurosurgical tumor specimen extractor of claim 7, wherein, The connecting assembly includes a connecting pipe communicated with the suction air source, the connecting pipe is rotatably connected with the suction pipe, a plurality of balls are movably arranged in the connecting pipe, and a sealing ring is arranged between the connecting pipe and the suction pipe.

9. The adjustable neurosurgical tumor specimen extractor of claim 8, wherein, The connecting pipe is provided with a collecting assembly, the collecting assembly includes a collecting box fixedly installed on the connecting pipe and communicated therewith, an elastic filter screen is fixedly installed in the connecting pipe, and the elastic filter screen is arranged in a hemispherical shape.

10. The adjustable neurosurgical tumor specimen extractor of claim 9, wherein, The auxiliary assembly includes a gripping ring slidably installed on the operating rod, a locking bolt is threadedly connected with the gripping ring, and one end of the locking bolt is abutted against the operating rod.

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