389 results about "Biopsy needles" patented technology

The invention provides an endoscopic positive negative pressure suction rotary-cut biopsy needle and a biopsy system.The biopsy needle comprises a far-end pipeline part and a near-end handheld part, the near-end handheld part comprises a near-end shell and a rotary-cut knife tube transmission assembly, and the near end of a rotary-cut knife tube is installed in the near-end shell through the rotary-cut knife tube transmission assembly; a negative pressure interface is formed in the near-end wall of the near-end shell; the rotary cutter tube transmission assembly comprises a circumferential rotation transmission mechanism and an axial movement transmission mechanism, the circumferential rotation transmission mechanism comprises a mandrel assembly and a rotating shaft sleeve which are located in the near-end shell, the rotary cutter tube is fixedly sleeved with the mandrel assembly, and the mandrel assembly is sleeved with the rotating shaft sleeve; the rotating shaft sleeve and the rotary cutter pipe are in dynamic sealing through a first dynamic sealing piece; the near end of the rotating shaft sleeve is fixedly and hermetically communicated with a rotating pipe; the rotating pipe is also hermetically communicated with the negative pressure interface through a second dynamic sealing piece; the rotating shaft sleeve is driven to rotate, so that the rotating shaft sleeve drives the mandrel assembly to rotate, and then the rotary cutter pipe is driven to rotate.

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.

A tilted needle biopsy assembly is provided for mounting on an x-ray system. Because the biopsy needle is angled relative to at least one of the detector and the x-ray source, x-ray imaging may be performed during the biopsy procedure without interference by the biopsy device. The angled biopsy needle additionally allows improved access to the axilla and chest wall of the patient. The stereotactic biopsy device of the present invention may be coupled to any x-ray system, whether upright or prone, including but not limited to mammography systems, tomosynthesis systems, and combination mammography / tomosynthesis systems. The system flexibly supports the use of any mode of image capture (i.e., scout, two dimensional mammogram, three-dimensional reconstructed volume) for either or both target visualization and target localization. With such an arrangement, a needle biopsy assembly having improved patient coverage is provided for use with a variety of different x-ray imaging platforms.

The rotary-cut biopsy needle transmission structure comprises an outer sleeve of a linear structure, the tool bit end of the rotary-cut biopsy needle transmission structure coaxially penetrates through a rotary-cut tool tube in the outer sleeve, and the rotary-cut tool tube is in clearance fit with the outer sleeve; the hollow screw rod is coaxially and fixedly arranged at the position, away from the outer sleeve, of the rotary cutting knife tube in a sleeving mode, the hollow screw rod is coaxially sleeved with a linear driving gear, and the linear driving gear is in threaded fit with the hollow screw rod; one end of the hollow screw is coaxially sleeved with a rotary driving gear, and an inner pipe of the rotary driving gear is in sliding fit with the hollow screw in the axial direction of the rotary driving gear and is fixedly clamped with the hollow screw in the rotating direction of the rotary driving gear; during use, the linear driving gear rotates to drive the hollow screw rod and the rotary cutter pipe to linearly move along the axis of the hollow screw rod and the rotary cutter pipe; and the rotary driving gear rotates to drive the hollow screw rod and the rotary cutter pipe to rotate around own axes. The rotary cutting knife tube is driven to move in the mode, the structure is simple, transmission is stable, the operation risk can be reduced, and the operation success rate is increased.

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 invention provides a magnetic drive biopsy needle type biopsy sampling capsule which comprises a capsule shell and a micro camera fixed in the capsule shell, the micro camera is connected with a micro camera data line, the micro camera data line is led out from the interior of the capsule shell, and after sampling is completed, the micro camera data line is connected with the capsule shell. The miniature camera data line serves as a traction rope, and the magnetic drive biopsy needle type biopsy sampling capsule is taken out of the oral cavity through the miniature camera data line. The magnetic drive biopsy needle type biopsy sampling capsule has the advantages that the miniature camera data line led out from the tail of the magnetic drive biopsy needle type biopsy sampling capsule can serve as a pull line and is directly pulled out from the mouth, and therefore the time needed by sampling is greatly shortened.

Methods and systems are provided for interventional ultrasound imaging. In one embodiment, a method comprises acquiring an ultrasound image of an anatomical region, segmenting an interventional device from the ultrasound image to obtain a segmented image, restoring an image quality of the ultrasound image to a reference image quality to obtain a restored ultrasound image, combining the segmented image with the restored ultrasound image to obtain a corrected ultrasound image, and displaying the corrected ultrasound image. In this way, ultrasound imaging may be used to image the position of an interventional device such as biopsy needle in an anatomical region, in real-time, with reduced image artifacts caused by the interventional device.

The invention provides a rotary cutting biopsy needle with an ablation function and a biopsy system.The rotary cutting biopsy needle comprises a far-end pipeline part and a near-end handheld part, and the far-end pipeline part comprises an outer sheath tube, a puncture needle tube and a rotary cutting knife tube which are movably arranged in a sleeving mode from outside to inside in sequence; the near-end handheld part comprises a near-end shell and a puncture depth adjusting mechanism, the puncture depth adjusting mechanism comprises a sheath base and a sheath base locking piece, the sheath base is of a sleeve structure, the far end of the sheath base is fixedly arranged at the near end of the outer sheath tube in a sleeving mode, the near end of the puncture needle tube penetrates through the sheath base into the near-end shell, and the near-end shell can axially move relative to the sheath base; the sheath seat and the sheath seat are locked through a sheath seat locking piece; a conductive patch is arranged in the sheath base, the conductive patch is in direct contact with the puncture needle tube, and a high-frequency connecting port is formed in the sheath base and is connected with the conductive patch; during ablation, the far end of the puncture needle tube extends into the tissue from the far end of the outer sheath tube to serve as an emitting electrode.

A tri-point tissue-collection needle configured similarly to a fine-needle-aspiration needle is configured to excise intact tissue cores for collection. The distal tip is configured with three beveled points separated by cutting edges, where a single longer / more distal point is trailed by and circumferentially separated from a symmetrical pair of points, providing a bilaterally symmetrical needle cannula distal end. A stylet may be provided through a lumen of the needle during introduction into a patient body, where the distal end surface of the stylet may be configured to complement the tri-point needle end configuration.

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 invention discloses an angle positioner for ablation biopsy needle puncture under CT guidance, and belongs to the technical field of ablation biopsy needle angle positions.In the moving process, a driving gear at the outer end of a rotating rod drives a first driven gear and a second driven gear to be linked, a right-hand thread screw and a left-hand thread screw are driven to rotate, and the right-hand thread screw is driven to rotate; the right-hand thread screw and the left-hand thread screw push the abutting pad to extend outwards to be fixed in the rotating process, the fixing function can be achieved in the moving process, the double-linkage function is achieved, the abutting pad can also be rotated manually to move outwards and inwards, and the fixing effect is achieved. An inner angle scanning piece and an angle identification groove are matched for use, the rotating angle is measured in the rotating process of a biopsy needle angle adjusting piece, focusing can be rapidly carried out while the rotating precision is improved, alignment laser and a biopsy needle containing groove are matched for use, the alignment laser is correspondingly connected with the focusing point of fixed laser and the focusing point of rotating laser, and the alignment precision is improved. The function that the biopsy needle can be independently adjusted is achieved.

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 invention relates to full-automatic bone marrow biopsy puncture equipment and an application method. The full-automatic bone marrow biopsy puncture equipment comprises an operation table, and a puncture module and a three-axis motion platform are arranged on the operation table; the puncture module comprises a vertical rod, a transparent pressing cover is coaxially fixed to the upper end of the vertical rod, and an annular movable groove is formed in the lower surface of the pressing cover; a cavity is formed in the hold-down cover; a cross rod is arranged in the cavity, a through hole allowing the vertical rod to penetrate through is formed in the center of the cross rod, and the inner diameter of the through hole is matched with the outer diameter of the vertical rod; a driving assembly is arranged in the cavity, a color ultrasound probe and an electric push rod are arranged at one end of the cross rod, and a biopsy needle, a suction unit and a lead screw assembly are arranged at the other end of the cross rod; a three-dimensional camera for collecting three-dimensional actions is arranged in the hold-down cover; the functions of hold-down color ultrasound scanning, three-dimensional image acquisition, human body hold-down, biopsy needle simulated puncture, biopsy needle automatic needle insertion and the like on a human body are integrated, and the problem that an accurate and automatic biopsy needle puncture scheme is difficult to implement on the ground is solved.

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 a biopsy needle based on electrode cutting, and belongs to the field of medical equipment, the biopsy needle comprises a cable, a handle, a needle rod and a needle head which are connected in sequence, and the handle is connected with a first negative pressure suction tube and a second negative pressure suction tube; a first negative pressure channel tube, a second negative pressure channel tube, a screw rod and an inner needle tube are arranged in the handle, an electrode tip is adopted on the inner needle tube for cutting, and living tissue sampling is completed through movement and cutting of the first negative pressure channel tube, the second negative pressure channel tube, the screw rod and the inner needle tube. The electrode tip is adopted for electrode cutting instead of a rotary cutting blade, rotary motion does not exist, noise is lower, cutting and coagulation can be achieved at the same time, bleeding is reduced, meanwhile, the situation that skin is planed due to the fact that the skin prolapses into a sample groove before the cutter advances into tissue is avoided, and pain and scars caused by sampling are reduced.

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.