280 results about "Biopsy needles" patented technology

The biopsy needle comprises a needle assembly, a shell, an inner needle tube seat, an outer needle tube seat and a rotary transmission mechanism, and the needle assembly comprises a needle core, an inner needle tube and an outer needle tube; the shell is provided with a containing cavity, and the needle core is fixedly connected to the shell; the inner needle tube seat is arranged in the containing cavity, the inner needle tube seat can move relative to the shell, the inner needle tube seat is fixedly connected with the inner needle tube, and the needle core is sleeved with the inner needle tube; the outer needle tube seat is arranged in the containing cavity, the outer needle tube seat can move relative to the shell and the inner needle tube seat, the outer needle tube seat is fixedly connected with the outer needle tube, and the inner needle tube is sleeved with the outer needle tube; the rotary transmission mechanism is arranged in the accommodating cavity and can operably rotate relative to the shell; wherein the inner needle tube seat and the outer needle tube seat can be connected with the rotary transmission mechanism after respectively moving for a preset stroke along the axis of the shell to complete sampling and percussion, so that the synchronous rotation of the inner needle tube and the outer needle tube is realized under the driving of the rotary transmission mechanism.

The invention belongs to the technical field of medical instruments, and particularly relates to a negative pressure biopsy needle which comprises an inner needle rod and an outer needle rod, the outer needle rod is coaxially arranged on the outer side of the inner needle rod in a sleeving mode, the inner needle rod is configured to be of a non-through type hollow structure, the two ends of the outer side of the inner needle rod are provided with an adsorption hole and a communicating hole respectively, and the adsorption hole is communicated with the communicating hole. The adsorption holes are communicated with the communicating holes; the outer needle rod is configured to move in the direction away from the handle assembly along the axis of the inner needle rod in a rotating mode in the process that the biopsy device is converted from the to-be-fired state to the fired state. When the launching assembly is converted from a to-be-fired state to a release state, the outer needle rod cuts and samples focus tissue in a rotating mode under the cooperation of the outer needle base and the spiral guide groove, and meanwhile, negative pressure is formed in the first negative pressure channel and the second negative pressure channel at the same time through the negative pressure assembly, and a tissue sample is adsorbed.

The invention relates to the technical field of medical apparatuses and instruments, and discloses a biopsy needle which comprises a shell. The near end of the inner needle tube is connected with an inner tube seat, and the inner tube seat is movably arranged in the shell; the inner needle tube is sleeved with the outer needle tube, the near end of the outer needle tube is connected with an outer tube seat, and the outer tube seat is movably arranged in the shell; the rotating mechanism is arranged in the shell and comprises a driving assembly and a transmission assembly in transmission connection with the driving assembly; wherein after the inner tube seat and the outer tube seat are triggered to complete sampling, the inner tube seat and the outer tube seat are both connected with the transmission assembly; by operably driving the rotating mechanism for multiple times, multiple times of synchronous rotation of the inner tube base and the outer tube base can be achieved. According to the biopsy needle provided by the invention, the biopsy needle can be relatively conveniently rotated so as to obtain a target tissue sample thoroughly separated from human tissues, and meanwhile, the range of influence on the human tissues around the target tissue when the biopsy needle is rotated is reduced.

The utility model provides a full-automatic biopsy needle based on electromagnetic navigation positioning, which belongs to the technical field of medical instruments and particularly comprises a shell, a percussion component, a biopsy needle component and a fixed protection tube. The shell is provided with a connecting through hole, the connecting through hole is used for installing the first connecting piece, and the fixing protection pipe is aligned with the center of the connecting through hole and the center of the sensor assembling channel; the first electromagnetic navigation sensor extends linearly after extending into the sensor assembling channel, the triggering assembly drives the biopsy needle to extend outwards towards the far end of the shell when triggering the triggering assembly to enter a triggering state, and the sensor assembling channel moves along with the biopsy needle assembly in the outward extending process of the biopsy needle assembly. And the first electromagnetic navigation sensor is kept linearly extending at the central position of the sensor assembly channel, so that the sensor state channel does not affect and damage the first electromagnetic navigation sensor when moving along with the biopsy needle assembly.

The utility model provides a full-automatic biopsy needle convenient to operate, belongs to the technical field of medical instruments, and particularly comprises a shell, a biopsy needle assembly, a percussion assembly and a trigger assembly. The trigger assembly comprises a rear trigger key, the trigger assembly has an initial position and a trigger position, the rear trigger key is arranged at the tail end of the shell, an opening is formed in the near end of the shell, the rear trigger key is movably assembled at the opening, and the pressing face of the rear trigger key is arranged to be an inclined face. The rear trigger key can be switched between an initial position and a trigger position in the process of moving at the opening, and the pressing surface of the rear trigger key is arranged to be an inclined surface, so that an operator can conveniently touch the rear trigger key and press the rear trigger key when holding the full-automatic biopsy needle for biopsy sampling, and the operation is convenient. And the rear trigger key moves from the initial position to the trigger position, so that the stability of holding the full-automatic biopsy needle by an operator and the accuracy of biopsy sampling are ensured.

The invention discloses a multi-mode auxiliary prostate puncture mechanism and a diagnosis method, the multi-mode auxiliary prostate puncture mechanism comprises a host and a puncture gun, the puncture gun comprises a plurality of puncture needles, a puncture bin and a first driving part, and the puncture needles are used for obtaining tissue samples; the puncture bin comprises a first bin body and a plurality of slideways arranged on the first bin body, the first bin body is provided with openings communicated with the slideways, the openings of the slideways are located on one side of the first bin body, and the puncture needles are arranged in the slideways and can stretch out or retract from the openings; the first driving part comprises a plurality of driving sub-parts and a driving main part, the driving sub-parts are arranged on the puncture needles respectively, the driving main part is arranged in the first bin body, and the driving main part is configured to selectively drive the driving sub-parts in part of the sliding ways and the corresponding puncture needles to move at the same time. According to the prostate puncture mechanism with the multi-mode auxiliary positioning function and the diagnosis method, the puncture accuracy can be improved, the puncture efficiency can be improved, and the discomfort of a patient can be reduced.

One or more example embodiments relates to a medical imaging device for examination of a body part of a patient, in particular a mammography device for examination of the female breast, comprising an imaging unit configured to perform an X-ray-based imaging concerning the body part positioned in a positioning area of the medical imaging device; and a biopsy device comprising a biopsy needle configured to obtain a tissue sample from the body part positioned in the positioning area and a light generating device configured to generate light to reach the positioning area.

The invention relates to a biopsy needle and a control method thereof. The biopsy needle comprises a main machine and a remote controller. The host comprises a wireless module receiving end, a microcontroller, a biopsy needle winding mechanism, a biopsy needle ejection mechanism and a biopsy needle triggering mechanism, the biopsy needle winding mechanism comprises a winding sliding block, and the biopsy needle ejection mechanism comprises a cutting needle seat and a compression spring. The host and the remote controller are in wireless transmission connection, so that the biopsy needle can be remotely controlled to be wound and excited, the state process of winding and excitation of the biopsy needle can be remotely controlled, the biopsy tissue obtaining operation can be remotely completed, a doctor does not need to manually complete excitation, the system is far away from the radiation environment, and the operation efficiency is improved. And the health of doctors is protected.

Disclosed is a biopsy needle, comprising: an inner needle tube (120); an outer needle tube (130), sleeved outside the inner needle tube; a housing (200); an inner needle tube seat (400), movably disposed within the housing and fixedly connected to the inner needle tube; an outer needle tube seat (300), movably disposed within the housing and fixedly connected to the outer needle tube, the outer needle tube seat and the inner needle tube seat being capable of relative movement; and a rotational transmission mechanism (500), disposed within the housing, wherein the rotational transmission mechanism is operably rotatable relative to the housing, and is configured to drive synchronous rotation of the inner needle tube and the outer needle tube.

The invention belongs to the technical field of biopsy needles, and particularly relates to a negative pressure self-adjusting type electric rotary cutting biopsy needle which comprises a biopsy device and a negative pressure cavity, and the biopsy device comprises a shell, an outer tube, an inner tube, a tool bit, a motor, a gear set and a biopsy drawer; the motor and the biopsy drawer are arranged in the shell, the outer tube is fixedly installed at the left end of the shell, the inner tube is arranged in the outer tube, the tool bit is fixedly connected with the inner tube, the output end of the motor is connected with the inner tube through the gear set, and the inner tube is connected with the interior of the biopsy drawer. The device solves the problems that when a current electric rotary cutting biopsy needle extracts biopsy tissue through a negative pressure pump, due to the fact that the negative pressure pump is poor in sealing and leaks or gas exists in the pump, the pressure is unstable, the operation safety is affected, and due to the fact that automatic negative pressure adjustment is adopted, the pressure numerical value is inaccurate, and the operation safety is affected. And the precision is poor relative to manual control.

The present invention discloses a soft tissue tumor puncture biopsy needle device, including a needle tube, a needle handle and a driving unit. A cylinder cavity is provided inside the needle handle; the proximal end of the needle tube is connected to the needle handle and the internal channel of the needle tube is connected to the cylinder cavity; a piston is slidably connected in the cylinder cavity, a driving structure is installed on the needle handle, and the output end of the driving unit is connected to the piston, which is used to drive the piston to slide in the cylinder cavity; an exhaust port connected to the outside is also provided on the cylinder cavity, and a one-way valve that only allows gas to flow from the cylinder cavity to the outside is provided on the exhaust port. The soft tissue tumor puncture biopsy needle device provided by the present invention can continuously draw the target object into the internal channel of the needle tube without the need for multiple punctures, and at the same time, it is not necessary to leave a safe distance like a cutting needle.

The utility model provides a full-automatic biopsy needle, which belongs to the technical field of biopsy needles, and particularly comprises a shell, a biopsy needle assembly, a percussion assembly, a triggering assembly and a locking assembly, the locking assembly comprises a locking piece, and at a locking position, the locking piece prevents the triggering assembly from moving towards a triggering position; a fixed supporting disc is formed in the shell, when the locking key moves to the locking position, the far-end side of the locking piece abuts against the fixed supporting disc, the locking assembly is arranged between the triggering assembly and the percussion assembly, the triggering assembly is prevented from moving to the triggering position, the situation that the locking assembly is arranged on a percussion path of the percussion assembly can be avoided, and the percussion effect is improved. When the percussion assembly conducts percussion, the percussion assembly is switched from the energy storage state to the percussion state, the locking assembly stops the percussion assembly from conducting percussion on the path of the percussion assembly, the percussion assembly can keep the percussion state all the time, the elastic force of the spring is large, and the locking assembly is prone to failure under long-time extrusion of the elastic force.

The invention relates to a particle pusher, and relates to the technical field of medical instruments, the particle pusher comprises a main body handle and a biopsy needle joint coaxially connected with the main body handle, and an axial mounting through hole is formed in the biopsy needle joint and used for inserting a particle needle. The pusher comprises a first limiting mechanism and a second limiting mechanism, the first limiting mechanism comprises a pressing piece, a first limiting piece and an elastic rubber part, the pressing piece is connected to the outer wall of the biopsy needle connector in a swinging mode through the elastic rubber part, and the dislocation and abutting state of the first limiting piece relative to the installation through hole is controlled by pressing and resetting of the pressing piece. The second limiting mechanism is arranged in the biopsy needle connector and is in transmission fit with the first limiting mechanism, and when the first limiting piece abuts against the particle needle in the first direction, the second limiting mechanism automatically abuts against the particle needle in the second direction which is not parallel to the second limiting mechanism, so that bidirectional limiting is formed. The structure has automatic unlocking and resetting functions in the inserting and positioning process of the particle needle, and is beneficial to stabilizing the position of the needle body and improving the operation precision.

The utility model provides an endoscope puncture needle with biopsy and ablation functions. The endoscope puncture needle comprises an operation main body, a biopsy needle, a catheter mechanism and a forceps channel fixer, the operation body comprises a limiting handle and a pushing rod, the limiting handle is provided with a first end and a second end which are opposite, one end of the pushing rod movably penetrates through the limiting handle through the first end, and the other end of the pushing rod is provided with a connecting part used for being externally connected with a negative pressure device or an electrode device; a needle inserting depth limiting mechanism matched with the push rod is arranged in the limiting handle, one end of the catheter mechanism is arranged in the limiting handle in a penetrating mode through a second end and communicated with the push rod, and the other end of the catheter mechanism is communicated with the biopsy needle; the forceps channel fixator is movably arranged on the catheter mechanism in a sleeving mode and used for fixing the catheter mechanism and a forceps channel opening of the endoscope. According to the utility model, the problem that the risk of postoperative complications of a patient is increased due to the increase of the number of times of puncture because the needle biopsy procedure and the ablation procedure need to be operated separately and punctured for multiple times in the existing medical procedure needing needle biopsy and interventional ablation treatment can be solved.

The invention discloses an angle-adjustable interventional biopsy needle suitable for deep tumors and a sampling method of the angle-adjustable interventional biopsy needle, and relates to the field of tumor interventional biopsy sampling, the angle-adjustable interventional biopsy needle comprises a guide sheathing canal, the guide sheathing canal is composed of an outer sheath layer on the outermost layer, a braid layer in the middle and a first lining layer on the inner layer, and a bending mechanism is arranged at the bottom of the guide sheathing canal; the bending mechanism comprises an active bending tube, the active bending tube is fixedly connected with the bottom of the guiding sheath tube, a protection pad is arranged at the bottom of the active bending tube, and a second lining layer is arranged on the inner side of the active bending tube. On the premise of single puncture, multi-point and multi-angle sampling of different quadrants and different depths in a tumor can be easily achieved, representative tissue samples can be obtained to the maximum extent through the design, sampling errors caused by tumor heterogeneity are effectively avoided, the occurrence rate of false negative results is remarkably reduced, and the sampling efficiency is improved. And a more reliable pathological basis is provided for clinical diagnosis.

The invention discloses an extraction device for tumor puncture, and relates to the technical field of medical instruments, the extraction device comprises a handle, a needle tube is arranged in the handle, a fixed sleeve head is arranged at the front end of the handle, a trocar is fixedly connected to the end, away from the handle, of the fixed sleeve head, the trocar is connected to the outer ring of the needle tube in a sleeving manner, and a sampling length adjusting mechanism is arranged in the handle; a quick dismounting mechanism is arranged at one end, close to the trocar, of the sampling length adjusting mechanism; through the arrangement of the sampling length adjusting mechanism, the pushing body is controlled to move the conveying body, then the clamping head is driven to be opened and closed, flexible control over the needle tube is achieved, the accuracy and convenience of the handle during tumor puncture sampling are improved, the exposed length of the needle tube can be accurately adjusted and controlled according to the specific sampling depth requirement of tumors in the body of a patient, and the working efficiency is improved. By means of the precise adjusting function, the sampling depth control problem of a traditional biopsy needle is solved, the sampling accuracy is remarkably improved, and a high-quality sample is provided for subsequent pathological analysis.

The utility model provides a full-automatic biopsy needle capable of being used in cooperation with a coaxial needle and a full-automatic biopsy needle suite, and belongs to the technical field of medical instruments, and the full-automatic biopsy needle suite comprises a shell, a percussion assembly, a trigger assembly and a biopsy needle assembly; the far end of the shell is provided with a connecting part connected with a coaxial needle, the far end of the biopsy needle assembly extends out of the connecting part, and when the connecting part is connected to the coaxial needle, the relative position of the shell and the coaxial needle is kept unchanged. According to the full-automatic biopsy needle capable of being used in cooperation with the coaxial needle, the connecting part is arranged at the end of the shell, the connecting part and the coaxial needle can be installed in a matched mode, and after the full-automatic biopsy needle is guided by the coaxial needle to enter a target position, the full-automatic biopsy needle can be used in cooperation with the coaxial needle through matched connection of the connecting part and the coaxial needle; the relative positions of the full-automatic biopsy needle and the coaxial needle are fixed, it is guaranteed that the full-automatic biopsy needle does not deviate relative to the coaxial needle in the sampling process, and the accuracy of the sampling result is guaranteed.

The utility model discloses a bone marrow biopsy needle with a dragging handle, and relates to the technical field of medical instruments. The puncture needle comprises a needle handle and a puncture tail column, a biopsy needle core is arranged at one end of the needle handle, a puncture needle is connected to the end face, away from the needle handle, of the puncture tail column, and a supporting handle is arranged on the periphery of the puncture needle in a sleeved mode. The peripheral side of the biopsy needle core is sleeved with a middle connecting column and a movable connecting column, a transmission gear ring and four driven gear rings are arranged in the middle connecting column in a rotating fit mode, and the driven gear rings are meshed with the side portion of the inner wall of the transmission gear ring. By rotating the rotating piece, the transmission gear ring drives the driven gear ring to rotate, so that the screw rod is driven to slide in the middle connecting column, the distance between the middle connecting column and the movable connecting column is conveniently adjusted according to the condition of a patient, and the overall length adjusting precision of the middle connecting column and the movable connecting column is improved; the requirement for preparing a plurality of middle connecting columns with different lengths is reduced, and the use cost is reduced.

The application discloses a tube cutting needle exciting structure and an operating method, and belongs to the field of medical equipment. The tube cutting needle exciting structure is used for exciting a tube cutting needle, and the tube cutting needle comprises a tube cutting needle assembly and a shell. The tube cutting needle assembly comprises an inner needle, an outer needle and a cutting needle, and the inner needle, the outer needle and the cutting needle are connected with an inner needle seat, an outer needle seat and a cutting needle seat arranged in the shell respectively. The tube cutting needle exciting structure further comprises an upper string sliding block. A second track parallel to a needle insertion direction is arranged on an inner wall of the shell, and the cutting needle seat, the outer needle seat and the inner needle seat are arranged on the second track. The upper string sliding block can drive the cutting needle seat, the outer needle seat or the inner needle seat to move reversely to the needle insertion direction to an upper string position, so that the tube cutting needle is excited. The tube cutting needle exciting structure has good structural stability. The upper string sliding block can be driven by power, so that the operation is labor-saving, and the doctor's physical strength is saved. In addition, the problem of poor biopsy needle structural stability caused by another power-saving structure is avoided.

A biopsy system includes a biopsy probe configured to sever tissue to acquire a tissue sample. The biopsy probe has biopsy needle portion having a proximal end, a distal end, and a lumen. A vacuum source is coupled to the lumen. The vacuum source is configured to generate a vacuum to transport the tissue sample through the lumen and expel the tissue sample from the lumen at the proximal end of the biopsy needle portion. An arrangement of compression plates is configured to receive the tissue sample from the proximal end of the biopsy probe and is operable to compress the tissue sample. The arrangement of compression plates has a plurality of impedance measurement electrodes. An impedance measurement circuit is connected to the plurality of impedance measurement electrodes.

This invention relates to the field of medical device technology, specifically to a firing control mechanism for a biopsy needle and the biopsy needle itself. The firing control mechanism includes at least a blocking part, a clearance groove, and an elastic arm. The blocking part is located on the front side of the inner needle slider, near the outer needle slider. The clearance groove is located near the proximal end of the blocking part, with a height difference between the clearance groove and the blocking part. One end of the elastic arm is fixedly mounted, and the free end of the elastic arm has a protrusion facing the blocking part. In the wound state, the protrusion is located between the first button and the blocking part. After the inner puncture needle is fired, until it stops moving or is about to stop moving, the protrusion enters the clearance groove. With this firing control mechanism, the firing interval between the inner and outer puncture needles is no longer affected by human operation, ensuring that the outer puncture needle is fired only after the inner puncture needle stops moving or is about to stop moving, thereby guaranteeing a high sampling success rate.

A thyroid fine needle puncture suction biopsy needle comprises a needle tube and a pressure control component. The pressure control component comprises a main body structure, a connecting part and a valve assembly, a pressure control cavity is formed in the main body structure, and the pressure control cavity can communicate with the interior of the needle tube through the connecting part; a vent hole communicated with the outside is formed in the main body structure, the valve assembly is located between the vent hole and the pressure control cavity, the valve assembly is connected with an operating hand button, and the operating hand button is used for controlling the valve assembly to be switched between an open state and a closed state; in the closed state, the valve assembly separates the pressure control cavity from the vent hole, and in the open state, the valve assembly is opened, so that the needle tube is communicated with the outside atmosphere through the pressure control cavity and the vent hole. According to the utility model, large negative pressure cannot be generated, so that a large amount of blood is prevented from being sucked, the proportion of the obtained nodule cell quantity is high, the pathological diagnosis rate is higher, the cell quantity of single puncture is increased, the risk of tumor needle passage metastasis is reduced, and the utility model belongs to the technical field of medical instruments.

The utility model relates to a matching structure of an inner knife and an outer knife of a biopsy needle. The matching structure comprises an inner knife tube and an outer needle tube sleeved outside the inner knife tube, an expansion pipe section capable of containing more collected tissues is arranged on the front side of the inner knife pipe, and the lower peripheral side pipe wall, corresponding to the pipe section, of the tissue suction inlet expands outwards to form an expansion groove structure; a fluid conveying channel is formed between the expansion groove structure and the outer wall of the expansion pipe section; the rear section of the inner knife tube is in clearance fit with the rear section of the outer needle tube to form an annular conveying cavity communicated with the fluid conveying channel. According to the utility model, the expansion tube section of the inner knife tube is matched with the expansion groove structure of the outer needle tube, so that the sample collection space of the inner knife tube is maximized, and the sampling effect is improved; while the outer wall surface of the expansion tube section is tightly attached to the inner wall surface of the outer needle tube, the gap is minimized, meanwhile, the expansion groove structure of the outer needle tube can be communicated with the annular conveying cavity, fluid communication is ensured, and cutter blockage caused by the fact that fluid cannot be communicated after tissue cutting is completed is avoided.

The present invention discloses a convenient blocking biopsy needle, comprising a guide needle, a connecting mechanism, a mounting plate, a cavity, a moving mechanism, a spring, a blocking mechanism, an observation mechanism, and a scale. When the puncture needle is taken out from the inside of the guide needle, the convenient blocking biopsy needle isolates the puncture point of the patient from the outside world through the function of the blocking mechanism, thereby preventing the blood in the patient's body from being discharged to the outside world through the guide needle. It can be seen that by using the device in the present application, the patient can be protected.

The utility model discloses a biopsy sampling power handle and a biopsy device, and relates to the technical field of medical instruments.The biopsy sampling power handle is matched with a biopsy needle, and the biopsy sampling power handle comprises a handle body assembly provided with a containing cavity and an assembly hole communicating the interior and the exterior of the containing cavity; the first electrode penetrates through the assembly hole in a sliding mode, the first electrode is provided with a first end and a second end which are oppositely arranged, the first end faces the interior of the containing cavity, and the second end faces the exterior of the containing cavity and is used for being connected with a first butt joint electrode of the biopsy needle; and the elastic piece is arranged between the first end of the first electrode and the handle body assembly so as to provide elastic force towards the outside of the accommodating cavity for the first electrode. According to the technical scheme, the stability of electric connection between the biopsy sampling power handle and the biopsy needle is improved.

The biopsy catheter comprises a deep part and a pushing part, the deep part is arranged on the front section of the catheter and deep into the myocardium, the deep part comprises a connecting sleeve, a biopsy needle and a shearing sleeve, the biopsy needle and the shearing sleeve are coaxially matched in a sliding mode, and the connecting sleeve and the biopsy needle are matched in a sliding mode; the pushing part is arranged at the tail end of the guide pipe, the pushing part comprises a butt joint pipe, a push rod and a sliding sleeve, the butt joint pipe is in coaxial sliding fit with the push rod, and the push rod is in coaxial sliding fit with the sliding sleeve. The device has the beneficial effects that a springback sampling mode is adopted, so that the phenomenon that the device is not broken in the sampling process is avoided, the pain of a patient is reduced, the problems of limited sampling depth and high complication risk of a traditional biopsy technology are solved, the sampling efficiency and the operation convenience are improved through rotary shearing, and the labor intensity of the patient is reduced. And reliable technical support is provided for accurate diagnosis of myocardial diseases.

The efficient anti-blocking biopsy needle comprises a needle head, the needle head is provided with a hollow needle core, a spiral groove is formed in the inner wall of the needle core in the length direction of the needle core, the depth of the spiral groove ranges from 50 micrometers to 200 micrometers, and the screw pitch of the spiral groove ranges from 0.5 mm to 1.2 mm. According to the efficient anti-blocking biopsy needle, the spiral groove is formed in the inner wall of the needle core, a tissue directional conveying channel is formed to relieve and guide local turbulence, and the adhesive strength of a fluid boundary layer is reduced, so that the adhesive force of tissue fragments to the inner wall of the needle core is greatly reduced, and the needle core is effectively prevented from being blocked; and the single puncture sample acquisition rate of the biopsy needle is greatly improved (up to more than 40%).

The utility model belongs to the technical field of medical equipment, and particularly relates to a vacuum suction system and biopsy sampling equipment, the vacuum suction system comprises a vacuum container, a first main pipeline is connected between the vacuum container and a negative pressure pump, and the vacuum container is further connected with a second main pipeline used for being communicated with a biopsy needle; each branch pressure relief pipeline is connected to the corresponding branch position of the first main pipeline and / or the second main pipeline, each branch pressure relief pipeline is provided with a branch pipeline valve, and the branch pipeline valves can be communicated with or cut off the corresponding branch pressure relief pipelines; and the main pipeline valve is arranged on the first main pipeline or the second main pipeline, and the main pipeline valve is arranged between the two adjacent branch positions, so that the first main pipeline and the second main pipeline are communicated in the suction mode, and the corresponding branch pressure relief pipelines are separated in the pressure relief mode. According to the utility model, the residual pressure in the vacuum container passage and the biopsy needle passage can be quickly and effectively removed, the explosion risk of sampling operation is effectively eliminated, and the phenomenon that the residual pressure drags focus tissues is avoided.

The application discloses a biopsy needle body assembly, which comprises a left body, a right body and a trigger mechanism, the left body and the right body are matched with each other, the trigger mechanism is slidably arranged in a cavity formed by matching the left body and the right body, and the body assembly further comprises a fastening device which is slidably matched on the left body and the right body. The application can improve the structural stability and the connecting strength of the biopsy needle body assembly.

The invention relates to a core biopsy needle (1) for obtaining a tissue sample comprising a hollow outer needle (10) extending along a longitudinal axis (L), and an inner needle (20), which is at least partially arranged or arrangeable within said outer needle along said longitudinal axis (L), wherein said inner needle (20) comprises at least one tissue-holding surface (21), wherein said tissue-holding surface (21) is adapted such that a tissue (3) adheres to the at least one tissue-holding surface (21), when the core biopsy needle (1) is inserted into the tissue (3).