A medical tumor biopsy device

Abstract

The application discloses a medical tumor biopsy device and relates to the technical field of biopsy sampling equipment, aiming to provide a medical tumor biopsy device which uses a rotary cutting type, avoids a pop-up type through tumor and reduces operation difficulty, and the technical points of the device comprise a shell, a rotating needle tube is rotationally arranged in the shell, a fixed needle tube is arranged on the outer side of the rotating needle tube, the fixed needle tube is arranged below the shell, a rotating driving assembly connected with the rotating needle tube is arranged in the shell, a coil spring connected with the shell is arranged on the rotating needle tube, and the technical effect is that the fixed needle tube and the rotating needle tube are arranged, the inner tube body can be rotated by 180 degrees under the driving of the rotating driving assembly, the chamber of the sampling cavity is aligned with the sampling port, tumor tissues enter the sampling cavity at the moment, then the inner tube body is rotated by 180 degrees again, the tumor tissues are cut by the side cutting knife, and the tumor tissues are enclosed in the sampling cavity and the sampling port.

Description

TECHNICAL FIELD

[0001] The present application relates to the biopsy sampling device technical field, specifically to a medical tumor biopsy device. BACKGROUND

[0002] Tumor biopsy is a kind of pathological examination by obtaining lesion tissue or cell sample to determine the nature, type and differentiation degree of tumor, which aims to determine the benign and malignant of lesion tumor, judge the tumor type characteristics, provide basis for treatment, and judge the patient's condition.

[0003] The existing tumor biopsy methods include puncture biopsy, surgical biopsy and endoscopic biopsy, wherein the puncture biopsy and endoscopic biopsy are performed before operation, which are used to determine the treatment plan of the patient, but the endoscopic biopsy can only be used for sampling of tumors in the cavities of human body such as gastrointestinal tract, respiratory tract and urinary tract, and the puncture biopsy is still needed for tumors in the positions such as lung, liver and breast in the human body.

[0004] The existing puncture biopsy device relies on a coarse needle and a fine needle which cooperate with each other, when in use, the device is first strung, after firing, the fine needle is first stretched out, and after a short delay, the coarse needle is stretched out, the tumor is cut by the cutting groove in the coarse needle and stored in the cavity between the two, but since the coarse needle and the fine needle need to be popped out to work, the amount of pop-out needs to be accurately grasped during operation, and in the case of some small tumors or inaccurate grasping of the amount of pop-out, the needle tip of the pop-out is easy to penetrate the tumor, resulting in the tumor tissue flowing out from the penetration surface, which is easy to cause the risk of tumor metastasis and diffusion. SUMMARY

[0005] (I) Technical problems solved

[0006] In view of the deficiencies of the prior art, the present application provides a medical tumor biopsy device which uses a rotary cutting type to avoid penetrating the tumor by pop-out and reduce the operation difficulty.

[0007] (II) Technical solutions

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a medical tumor biopsy device, comprising a shell, a rotary needle tube is rotationally arranged in the shell, a fixed needle tube is arranged on the outer side of the rotary needle tube, the fixed needle tube is arranged below the shell, a rotary driving assembly connected with the rotary needle tube is arranged in the shell, and a coil spring connected with the inside of the shell is arranged on the rotary needle tube.

[0009] The fixed needle tube comprises an outer tube body connected with the shell, the outer tube body is in a hollow type, and a needle tip is arranged at the bottom, and a sampling port is arranged on the side of the outer tube body close to the needle tip.

[0010] The rotating needle tube comprises an inner tube body rotatably arranged in an outer tube body, the inner tube body is connected with a rotating driving assembly, the inner tube body is provided with a sampling cavity corresponding to the position of the sampling port, and the side of the sampling cavity is provided with a cutter.

[0011] Preferably, the rotating driving assembly comprises a gear connected with the rotating needle tube, the side of the gear is engaged with a rack, and the side of the rack is provided with a sliding groove;

[0012] The shell comprises a square shell matched with the gear and the rack, and the square shell is provided with a guide groove matched with the sliding groove.

[0013] Preferably, the rotating driving assembly comprises a rotating sleeve sleeved on the rotating needle tube, the rotating sleeve is provided with a fixing clamp connected with the rotating needle tube, and the lower part of the rotating sleeve is provided with a locking hole;

[0014] The shell comprises a circular shell matched with the rotating sleeve, the circular shell is provided with a locking assembly matched with the locking hole, and the locking assembly is provided with two trigger ends penetrating through the circular shell.

[0015] Preferably, the locking assembly comprises a locking rod slidingly arranged on the circular shell, the locking rod is inserted into the locking hole, a second spring is sleeved on the locking rod and connected with the inner wall of the circular shell, a linkage frame is arranged below the locking rod, an inclined plate is arranged in the linkage frame, and a pressing rod penetrating through the circular shell is attached to the upper part of the inclined plate.

[0016] Preferably, the shell is provided with a threaded sleeve sleeved on the outer tube body, and the top end of the outer tube body is provided with a threaded groove connected with the threaded sleeve.

[0017] Preferably, the shell is provided with an anti-loosening assembly for limiting the rotation of the outer tube body, the anti-loosening assembly comprises an anti-loosening piece arranged below the shell, the anti-loosening piece is attached to the outer side of the outer tube body, a clamping plate is arranged below the anti-loosening piece, a clamping groove matched with the clamping plate is formed in the outer side of the outer tube body, an anti-loosening sleeve is threadedly matched with the outer side of the anti-loosening piece, and a crease groove is formed at the position where the anti-loosening sleeve is connected with the clamping plate.

[0018] Preferably, the inner tube body is provided with a communication hole penetrating through the upper and lower parts of the inner tube body, the top end of the inner tube body is provided with a piston cavity, and the piston cavity is provided with a negative pressure exhaust assembly;

[0019] The negative pressure exhaust assembly comprises a one-way exhaust plate sealingly and slidingly matched with the piston cavity, the one-way exhaust plate is provided with a connecting rod, the connecting rod is provided with a pressing plate, and the pressing plate is provided with a first spring connected with the inner wall of the piston cavity.

[0020] Preferably, the one-way exhaust plate comprises a piston plate body, a sealing ring is arranged on the outer ring of the piston plate body and is in sealing cooperation with the inner wall of the piston cavity, an exhaust hole is arranged in the piston plate body and penetrates the piston plate body from top to bottom, a rubber gasket is arranged on the piston plate body and covers the exhaust hole, a bolt member is arranged on the rubber gasket, and a bolt hole is arranged in the piston plate body and connected with the bolt member.

[0021] The application further provides a use method of the medical tumor biopsy device.

[0022] S1, holding the square shell with one hand, placing the index finger outside the rack and the thumb on the top of the square shell, and inserting the fixed needle tube into the tumor through the sleeve;

[0023] S2, when the sampling port is completely placed in the tumor, pressing the rack with the index finger to drive the rotating needle tube to rotate 180 degrees through the gear, so that the sampling cavity is aligned with the sampling port, and the tumor group enters the sampling cavity;

[0024] S3, then releasing the index finger, relying on the coil spring to drive the rotating needle tube to rotate 180 degrees in the reverse direction to reset, and cutting the tumor tissue with the cutter on the side of the sampling cavity and storing the tumor tissue in the sampling cavity and the sampling port.

[0025] The application further provides another use method of the medical tumor biopsy device.

[0026] S4, first driving the rotating needle tube to rotate 360 degrees through the rotating sleeve to store energy in the coil spring, and fixing the rotating needle tube through the locking assembly, then holding the circular shell with one hand, placing the thumb on the upper part of the locking assembly, and inserting the fixed needle tube into the tumor through the sleeve;

[0027] S5, when the sampling port is completely placed in the tumor, pressing the locking assembly with the thumb to release the fixation of the rotating sleeve, and then releasing the kinetic energy of the coil spring to drive the rotating needle tube to rotate 360 degrees in the reverse direction to reset;

[0028] S6, when the rotating needle tube rotates to 180 degrees, the sampling cavity is aligned with the sampling port, the tumor tissue enters the sampling cavity, when the rotating needle tube rotates 360 degrees, the sampling cavity and the sampling port are closed, and the tumor tissue is left in the sampling cavity.

[0029] (Three) beneficial effects

[0030] Compared with the prior art, the application provides a medical tumor biopsy device, which has the following beneficial effects:

[0031] 1. By setting the fixed needle tube and the rotating needle tube, the rotating needle tube is rotated and arranged in the outer tube body of the fixed needle tube by the inner tube body, the outer wall of the sampling cavity under the inner tube body is attached to the sampling port in the normal state, the sampling port in this state is closed, when the sampling port is inserted into the tumor, the inner tube body can be rotated 180 degrees under the driving of the rotating drive assembly, so that the chamber of the sampling cavity is aligned with the sampling port, at this time the tumor tissue will enter the sampling cavity, then the inner tube body rotates 180 degrees again, so that the outer wall of the sampling cavity is aligned with the sampling port, and the tumor tissue is cut off by the side cutter, at this time the tumor tissue is closed in the sampling cavity and the sampling port, the purpose of cutting and sampling the tumor tissue by rotation is realized, the risk of traditional pop-up needle penetrating the tumor is avoided, and the cutting movement is completely in the inner part of the outer tube body, so that the doctor only needs to control the position of the outer tube body to ensure that the tumor will not be penetrated and damaged during sampling.

[0032] 2. By setting the negative pressure exhaust assembly, the negative pressure exhaust assembly is arranged at the top of the inner tube body and connected with the sampling cavity through the communication hole, before sampling, the connecting rod is pressed downward by the pressing plate, the connecting rod drives the one-way exhaust plate to move into the piston cavity and exhausts the air, then the pressing plate is released, the connecting rod and the one-way exhaust plate move upward and reset under the pushing of the first spring, due to the structural design of the one-way exhaust plate, air cannot flow in, at the same time, the space in the piston cavity increases, so that the air in the sampling cavity enters the piston cavity through the communication hole, at this time, the sampling cavity and the piston cavity are in a negative pressure state, in this way, on the one hand, the tumor tissue can be quickly sucked in by negative pressure during sampling, on the other hand, air can be prevented from entering the human body. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a stereographic view of an embodiment of the present application;

[0034] Figure 2 It is a stereographic view of the sampling cavity and the sampling port of the present application;

[0035] Figure 3 It is a sectional view of an embodiment of the present application;

[0036] Figure 4 It is a plan view of an embodiment of the present application;

[0037] Figure 5 It is a stereographic view of the rotating drive assembly of an embodiment of the present application;

[0038] Figure 6 It is a schematic view of the present application Figure 4 enlarged view of A;

[0039] Figure 7 It is a stereographic view of another embodiment of the present application;

[0040] Figure 8Fig. 2 is a cross-sectional view of another embodiment of the present application;

[0041] Figure 9 Fig. 3 is a plan view of another embodiment of the present application;

[0042] Figure 10 Fig. 4 is a cross-sectional view of a rotary drive assembly of another embodiment of the present application;

[0043] Figure 11 Fig. 5 is a cross-sectional view of a locking assembly of the present application;

[0044] Figure 12 Fig. 6 is a perspective view of a negative pressure exhaust assembly of the present application;

[0045] Figure 13 Fig. 7 is a perspective view of a one-way exhaust plate of the present application;

[0046] Figure 14 Fig. 8 is a schematic view of a holding manner of one embodiment of the present application;

[0047] Figure 15 Fig. 9 is a schematic view of a holding manner of another embodiment of the present application.

[0048] Fig. 1: 1, outer shell; 101, square shell; 102, guide groove; 103, circular shell;

[0049] 2, rotary drive assembly; 201, gear; 202, rack; 203, sliding slot; 204, rotary sleeve; 205, locking hole; 206, fixed clamp;

[0050] 3, negative pressure exhaust assembly; 301, connecting rod; 302, pressing plate; 303, first spring;

[0051] 304, one-way exhaust plate; 3041, piston plate body; 3042, sealing ring; 3043, exhaust hole; 3044, bolt hole; 3045, rubber washer; 3046, bolt;

[0052] 4, fixed needle tube; 401, outer tube body; 402, sampling port; 403, needle tip;

[0053] 5, rotary needle tube; 501, inner tube body; 502, cutter; 503, sampling cavity; 504, communication hole; 505, piston cavity;

[0054] 6, coil spring; 7, threaded groove; 8, threaded sleeve;

[0055] 9, anti-loosening assembly; 901, anti-loosening sleeve; 902, anti-loosening piece; 903, clamping plate; 904, crease groove; 905, clamping groove;

[0056] 10. Locking assembly; 1001. Linkage frame; 1002. Locking lever; 1003. Second spring; 1004. Inclined plate; 1005. Pressing lever. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0058] Please refer to Figures 1-15 A medical tumor biopsy device, comprising a shell 1, a rotating needle tube 5 is rotatably arranged in the shell 1, a fixed needle tube 4 is arranged on the outer side of the rotating needle tube 5, the fixed needle tube 4 is arranged below the shell 1, a rotating drive assembly 2 connected with the rotating needle tube 5 is arranged in the shell 1, and a coil spring 6 connected with the inside of the shell 1 is arranged on the rotating needle tube 5;

[0059] The fixed needle tube 4 comprises an outer tube body 401 connected with the shell 1, the outer tube body 401 is hollow, and a needle tip 403 is arranged at the bottom of the outer tube body 401; a sampling port 402 is arranged on the side of the outer tube body 401 close to the needle tip 403;

[0060] The rotating needle tube 5 comprises an inner tube body 501 rotatably arranged in the outer tube body 401, the inner tube body 501 is connected with the rotating drive assembly 2, a sampling cavity 503 is arranged on the inner tube body 501 corresponding to the position of the sampling port 402, and a cutter 502 is arranged on the side of the sampling cavity 503;

[0061] As Figure 2 shown, by arranging the fixed needle tube 4 and the rotating needle tube 5, the rotating needle tube 5 is rotatably arranged in the outer tube body 401 of the fixed needle tube 4 by means of the inner tube body 501; in a normal state, the outer wall of the sampling cavity 503 below the inner tube body 501 is attached to the sampling port 402, and the sampling port 402 in this state is closed; when the sampling port 402 is inserted into a tumor, the inner tube body 501 can be rotated by 180 degrees under the drive of the rotating drive assembly 2, so that the cavity of the sampling cavity 503 is aligned with the sampling port 402; at this time, the tumor tissue enters the sampling cavity 503, and then the inner tube body 501 is rotated by 180 degrees again, so that the outer wall of the sampling cavity 503 is aligned with the sampling port 402, and the tumor tissue is cut off by means of the cutter 502 on the side; at this time, the tumor tissue is enclosed in the sampling cavity 503 and the sampling port 402, the purpose of cutting and sampling the tumor tissue by rotation is achieved, the risk of the traditional pop-up type needle tip 403 penetrating the tumor is avoided, and the cutting movement is completely in the inside of the outer tube body 401; when a doctor operates, the position of the outer tube body 401 only needs to be controlled to ensure that the tumor will not be penetrated and damaged during sampling;

[0062] The spring 6 is arranged on the rotating needle tube 5, and when the rotating needle tube 5 rotates, the spring 6 is driven to store the rotating kinetic energy and automatically drive the rotating needle tube 5 to reset, and at the same time, the sampling cavity 503 under the rotating needle tube 5 is in a closed state in a normal state;

[0063] In addition, it should be further explained that the above device can be directly matched with the existing sleeve, and the sleeve is a needle sheath or coaxial needle known to those skilled in the art, which is used to establish a fixed channel to facilitate puncture work and prevent tumor tissue brought out during puncture from contacting human healthy cells, so it is not described here.

[0064] Embodiment 1

[0065] As shown in Figure 1 , Figure 3 , Figure 4 and Figure 5 , the rotating drive assembly 2 includes a gear 201 connected with the rotating needle tube 5, the side surface of the gear 201 is engaged with a rack 202, the side surface of the rack 202 is provided with a sliding groove 203, and the shell 1 includes a square shell body 101 matched with the gear 201 and the rack 202, and the square shell body 101 is provided with a guide groove 102 matched with the sliding groove 203;

[0066] By arranging the gear 201 and the rack 202, this embodiment converts the horizontal pressing force into rotating force by the connection mode of the gear 201 and the rack 202, and drives the rotating needle tube 5, so that single-handed holding and operation can be performed, and the structure of this embodiment can control the sampling time, that is, the rack 202 is pressed, the inner needle tube is rotated by 180 degrees under the drive of the gear 201, at this time, the sampling cavity 503 is unfolded, the rack 202 is released, the above structure is reset by the elastic force of the spring 6, and the sampling cavity 503 is closed, the pressing time of the rack 202 is proportional to the unfolding time of the sampling cavity 503, which is convenient for doctors to sample according to the tumor condition.

[0067] Embodiment 2

[0068] As shown in Figure 7 , Figure 8 , Figure 9 and Figure 10 , the rotating drive assembly 2 includes a rotating sleeve 204 sleeved on the rotating needle tube 5, the rotating sleeve 204 is provided with a fixed clamp 206 connected with the rotating needle tube 5, and the rotating sleeve 204 is provided with a locking hole 205;

[0069] The shell 1 includes a circular shell body 103 matched with the rotating sleeve 204, and the circular shell body 103 is provided with a locking assembly 10 matched with the locking hole 205, and the locking assembly 10 is provided with two trigger ends penetrating through the circular shell 1;

[0070] By setting the rotating sleeve 204 and the locking assembly 10, this embodiment utilizes the rotating sleeve 204 to be connected with the rotating needle tube 5, and in use, the rotating sleeve 204 drives the rotating needle tube 5 to rotate 360 degrees, so that the coil spring 6 stores energy, and the rotating needle tube 5 rotates 360 degrees and is still in a closed state, and in use, the locking assembly 10 is pressed to release the fixation of the rotating sleeve 204, at this time, the coil spring 6 releases kinetic energy, drives the rotating needle tube 5 to rotate 360 degrees in the opposite direction, and when the rotating needle tube 5 rotates to 180 degrees, the sampling cavity 503 is opened, the tumor tissue enters and is stored after being cut, in this embodiment, the pre-tensioning and rapid firing mode is used to achieve the purpose of rotary cutting sampling, and the sampling work is faster, which can be applied to some tumor diseases that cannot be contacted for a long time.

[0071] The above-mentioned embodiments 1 and 2 are different embodiments of the rotating drive assembly 2 of the present application, and the purpose is to drive the rotating needle tube 5 to rotate, and to replace the traditional pop-up cutting with a rotary cutting mode, and the movement process is in the range of the fixed needle tube 4, and the operator can ensure that the tumor tissue will not be penetrated during sampling, thereby preventing the tumor tissue from spreading.

[0072] As shown in Figure 8 and Figure 11 , the locking assembly 10 includes a locking rod 1002 slidingly arranged on the circular housing 103, the locking rod 1002 is inserted into the locking hole 205, a second spring 1003 connected with the inner wall of the circular housing 103 is sleeved on the locking rod 1002, a linkage frame 1001 is arranged below the locking rod 1002, an inclined plate 1004 is arranged in the linkage frame 1001, and a pressing rod 1005 penetrating through the circular housing 103 is attached to the upper part of the inclined plate 1004;

[0073] Under normal circumstances, the second spring 1003 drives the locking rod 1002 to move upward, so that the locking rod 1002 is inserted into the locking hole 205, thereby limiting the rotation of the rotating sleeve 204, when it is necessary to release the rotating sleeve 204, the pressing rod 1005 can be directly pressed, and the pressing rod 1005 pushes the linkage frame 1001 to move through the inclined plate 1004, the linkage frame 1001 pulls the locking rod 1002, so that the locking rod 1002 is separated from the locking hole 205, thereby achieving the purpose of rapid firing and releasing, and the pressing rod 1005 and the linkage frame 1001 are connected in series, and two of them are located at the upper end and the lower end of the circular housing 1, when used vertically, the index finger can press the pressing rod 1005 at the upper end to fire, and when used horizontally, the thumb can press the pressing rod 1005 at the lower end to fire.

[0074] As shown in Figure 3 , the housing 1 is provided with a threaded sleeve 8 sleeved on the outer tube body 401, and the top end of the outer tube body 401 is provided with a threaded groove 7 connected with the threaded sleeve 8;

[0075] By setting the threaded sleeve 8 and the threaded groove 7, the outer pipe body 401 can be connected with the threaded sleeve 8 in the shell 1 by the threaded groove 7 at the top, so that the outer pipe body 401 has the characteristics of being detachable, and in this way, the outer pipe body 401 can be detached after use, which is convenient for cleaning the inside and outside of the outer pipe body 401, and also facilitates cleaning the inner pipe body 501, avoiding the formation of a sanitary dead angle.

[0076] As shown in Figure 6 The shell 1 is provided with an anti-loosening assembly 9 for limiting the rotation of the outer pipe body 401, and the anti-loosening assembly 9 includes an anti-loosening piece 902 arranged below the shell 1, which is attached to the outer side of the outer pipe body 401. The lower side of the anti-loosening piece 902 is provided with a clamping plate 903, and the outer side of the outer pipe body 401 is provided with a clamping groove 905 which is embedded with the clamping plate 903. The outer side of the anti-loosening piece 902 is threadedly connected with an anti-loosening sleeve 901, and the connecting position of the anti-loosening sleeve 901 and the clamping plate 903 is provided with a crease groove 904.

[0077] By setting the clamping plate 903 and the anti-loosening sleeve 901, when the outer pipe body 401 is connected with the threaded sleeve 8 by the threaded groove 7, the anti-loosening sleeve 901 can be rotated downward by threadedly connecting with the anti-loosening piece 902, so that the inner wall of the anti-loosening sleeve 901 is attached to the outer wall of the clamping plate 903, and the clamping plate 903 is inserted into the clamping groove 905 on the outer side of the outer pipe body 401, achieving the purpose of fixing the outer pipe body 401 and preventing the inner pipe body 501 from rotating and causing the outer pipe body 401 to loosen due to friction.

[0078] When it is necessary to detach the outer pipe body 401, the anti-loosening sleeve 901 can be rotated upward to separate it from the clamping plate 903, and then the outer pipe body 401 can be directly rotated. At this time, the clamping plate 903 will deform and expand outward along the crease groove 904 due to the loss of fixation of the anti-loosening sleeve 901, and thus lose the limitation of the clamping groove 905, so that the outer pipe body 401 cannot be fixed again.

[0079] The inner pipe body 501 is provided with a communication hole 504 which penetrates from top to bottom in the center, and the top end of the inner pipe body 501 is provided with a piston cavity 505, and the piston cavity 505 is provided with a negative pressure exhaust assembly 3.

[0080] As shown in Figure 12 The negative pressure exhaust assembly 3 includes a one-way exhaust plate 304 which is in sealing sliding connection with the piston cavity 505, and the one-way exhaust plate 304 is provided with a connecting rod 301, and the connecting rod 301 is provided with a pressing plate 302, and the pressing plate 302 is provided with a first spring 303 which is connected with the inner wall of the piston cavity 505.

[0081] By setting the negative pressure exhaust assembly 3, the negative pressure exhaust assembly 3 is arranged at the top of the inner tube body 501 and is connected with the sampling cavity 503 through the communication hole 504; before sampling, the pressing plate 302 is pressed downward to press the connecting rod 301, the connecting rod 301 drives the one-way exhaust plate 304 to move into the piston cavity 505 and exhausts air, then the pressing plate 302 is released, the connecting rod 301 and the one-way exhaust plate 304 are moved upward to reset under the pushing of the first spring 303; due to the structural design of the one-way exhaust plate 304, air cannot flow in, at the same time, the space in the piston cavity 505 is increased, so that the air in the sampling cavity 503 enters the piston cavity 505 through the communication hole 504, at this time, the sampling cavity 503 and the piston cavity 505 are in a negative pressure state, in this way, on the one hand, the tumor tissue can be quickly sucked into the human body by using negative pressure during sampling, on the other hand, air can be prevented from entering the human body.

[0082] As shown in Figure 13 The one-way exhaust plate 304 comprises a piston plate body 3041, a sealing ring 3042 is arranged at the outer ring of the piston plate body 3041 and is in sealing cooperation with the inner wall of the piston cavity 505, an exhaust hole 3043 is arranged in the piston plate body 3041 and penetrates the piston plate body 3041 upward and downward, a rubber gasket 3045 is arranged on the piston plate body 3041 and covers the exhaust hole 3043, a bolt 3046 is arranged on the rubber gasket 3045, and a bolt hole 3044 is arranged in the piston plate body 3041 and is connected with the bolt 3046.

[0083] By arranging the rubber gasket 3045, the rubber gasket 3045 is arranged on the piston plate body 3041 through the bolt 3046, when the piston plate body 3041 moves into the piston cavity 505, the air in the piston cavity 505 is compressed and is higher than the air pressure outside, at this time, the air in the piston cavity 505 pushes the rubber gasket 3045 and is exhausted, when the piston plate body 3041 moves out of the piston cavity 505, the air pressure in the piston cavity 505 is lower than the air pressure outside, the air outside is pressed on the rubber gasket 3045, the rubber gasket 3045 is tightly attached to the exhaust hole 3043 under the pressing of the air, so that the air cannot enter the piston cavity 505, thereby maintaining the negative pressure state of the piston cavity 505, and it needs to be noted that the sampling cavity 503 and the sampling port 402 are closed and have an airtight effect.

[0084] As shown in Figure 14 The application further provides a use method of the medical tumor biopsy device, which comprises the following steps:

[0085] S1, holding the square shell 101 with one hand, placing the index finger outside the rack 202 and the thumb on the top of the square shell 1, and inserting the fixed needle tube 4 into the tumor through the sleeve;

[0086] S2, when the sampling port 402 is completely placed inside the tumor, the index finger presses the rack 202, so that the rack 202 drives the rotating needle tube 5 to rotate 180 degrees through the gear 201, so that the sampling cavity 503 is aligned with the sampling port 402, at this time, the tumor group enters the sampling cavity 503;

[0087] S3, then release the index finger, rely on the coil spring 6 to drive the rotating needle tube 5 to rotate 180 degrees in the opposite direction to reset, at the same time, the cutter 502 on the side of the sampling cavity 503 cuts the tumor tissue and saves it in the sampling cavity 503 and the sampling port 402.

[0088] As shown in Figure 15 The application also provides another use method of the medical tumor biopsy device, which comprises the following steps:

[0089] S4, first drive the rotating needle tube 5 to rotate 360 degrees through the rotating sleeve 204, so that the coil spring 6 stores energy, and then fix the rotating needle tube 5 by using the locking assembly 10, then hold the circular shell 103 with one hand, place the thumb on the upper part of the locking assembly 10, and insert the fixed needle tube 4 into the tumor through the sleeve;

[0090] S5, when the sampling port 402 is completely placed inside the tumor, the thumb presses the locking assembly 10 to release the fixation of the rotating sleeve 204, then the coil spring 6 releases kinetic energy to drive the rotating needle tube 5 to rotate 360 degrees in the opposite direction to reset;

[0091] S6, when the rotating needle tube 5 rotates to 180 degrees, the sampling cavity 503 is aligned with the sampling port 402, the tumor tissue enters the sampling cavity 503, when the rotating needle tube 5 rotates 360 degrees, the sampling cavity 503 and the sampling port 402 are closed, and the tumor tissue is left in the sampling cavity 503.

[0092] The above is only a specific embodiment of the application, but the technical features of the application are not limited to this. Any simple change, equivalent replacement or modification made on the basis of the application to solve the basically same technical problem and realize the basically same technical effect is also covered in the protection scope of the application.

Claims

1. A medical tumour biopsy device comprising a housing (1), characterised in that: The shell (1) is provided with a rotating needle tube (5) inside, the outer side of the rotating needle tube (5) is provided with a fixed needle tube (4), the fixed needle tube (4) is arranged on the shell (1), the shell (1) is provided with a rotating drive assembly (2) connected with the rotating needle tube (5), and the rotating needle tube (5) is provided with a coil spring (6) connected with the inside of the shell (1); The fixed needle tube (4) comprises an outer tube body (401) connected with the shell (1), the outer tube body (401) is hollow, and the bottom is provided with a needle tip (403); a sampling port (402) is formed in the side of the outer tube body (401) close to the needle tip (403); The rotating needle tube (5) comprises an inner tube body (501) rotatably arranged in the outer tube body (401), the inner tube body (501) is connected with the rotating drive assembly (2), and a sampling cavity (503) is formed in the inner tube body (501) corresponding to the position of the sampling port (402); and a cutter (502) is arranged on the side of the sampling cavity (503); The shell (1) is provided with a threaded sleeve (8) sleeved on the outer tube body (401), and the top end of the outer tube body (401) is provided with a threaded groove (7) connected with the threaded sleeve (8); The shell (1) is provided with an anti-loosening assembly (9) for limiting the rotation of the outer tube body (401), the anti-loosening assembly (9) comprises an anti-loosening piece (902) arranged on the shell (1), the anti-loosening piece (902) is attached to the outer side of the outer tube body (401), the bottom of the anti-loosening piece (902) is provided with a clamping plate (903), the outer side of the outer tube body (401) is provided with a clamping groove (905) matched with the clamping plate (903), the outer side of the anti-loosening piece (902) is provided with a anti-loosening sleeve (901) in threaded connection, and the anti-loosening sleeve (901) is provided with a crease groove (904) at the position connected with the clamping plate (903); The center of the inner tube body (501) is provided with a through hole (504) penetrating upward and downward, and the top end of the inner tube body (501) is provided with a piston cavity (505); and the piston cavity (505) is provided with a negative pressure exhaust assembly (3); The negative pressure exhaust assembly (3) comprises a one-way exhaust plate (304) in sealing sliding fit with the piston cavity (505), the one-way exhaust plate (304) comprises a piston plate body (3041), the outer ring of the piston plate body (3041) is provided with a sealing ring (3042) in sealing fit with the inner wall of the piston cavity (505), the piston plate body (3041) is provided with an exhaust hole (3043) penetrating upward and downward, the piston plate body (3041) is provided with a rubber gasket (3045) covering the exhaust hole (3043), the rubber gasket (3045) is provided with a bolt (3046), and the piston plate body (3041) is provided with a bolt hole (3044) connected with the bolt (3046).

2. The medical tumor biopsy device of claim 1, wherein: The rotating drive assembly (2) comprises a gear (201) connected with the rotating needle tube (5), the side of the gear (201) is engaged with a rack (202), and the side of the rack (202) is provided with a sliding groove (203). The shell (1) comprises a square shell (101) matched with the gear (201) and the rack (202), and the square shell (101) is internally provided with a guide groove (102) matched with a sliding groove (203).

3. The medical tumor biopsy device of claim 1, wherein: The rotating driving assembly (2) comprises a rotating sleeve (204) sleeved on the rotating needle tube (5), the rotating sleeve (204) is internally provided with a fixed clamp (206) connected with the rotating needle tube (5), and the rotating sleeve (204) is provided with a locking hole (205) at the lower portion. The shell (1) comprises a circular shell (103) matched with the rotating sleeve (204), the circular shell (103) is internally provided with a locking assembly (10) matched with the locking hole (205), and the locking assembly (10) is provided with two trigger ends penetrating through the circular shell (1).

4. The medical tumor biopsy device of claim 3, wherein: The locking assembly (10) comprises a locking rod (1002) slidingly arranged on the circular shell (103), the locking rod (1002) is inserted with the locking hole (205), the locking rod (1002) is sleeved with a second spring (1003) connected with the inner wall of the circular shell (103), the lower portion of the locking rod (1002) is provided with a linkage frame (1001), the linkage frame (1001) is internally provided with an inclined plate (1004), and the inclined plate (1004) is attached with a pressing rod (1005) penetrating through the circular shell (103).

5. The medical tumor biopsy device of claim 1, wherein: The one-way exhaust plate (304) is provided with a connecting rod (301), the connecting rod (301) is provided with a pressing plate (302), and the lower portion of the pressing plate (302) is provided with a first spring (303) connected with the inner wall of the piston cavity (505).

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