52 results about "Core needle" patented technology

The invention discloses a breast image segmentation method based on dynamic sampling and multi-scale parallel attention, and the method carries out the related work on a breast cancer core needle biopsy full-slice data set and a mammary gland slice data set built by a company, and carries out the training and verification of a mammary gland image segmentation model through a mammary gland tissue image data set. And predicting a to-be-detected mammary gland pathological section by using the trained segmentation model weight to obtain the specific position and type of the mammary gland abnormal tissue. According to the method, high-resolution features can be continuously reserved in the whole segmentation process, expression of important features is enhanced through a proposed attention mechanism, background information is effectively inhibited, detail and global information is captured under multiple scales, and the tumor detection precision of the model is effectively improved.

The invention discloses an intravascular adjustable ultrasonic real-time navigation TIPS puncture instrument, and relates to the technical field of medical devices, the intravascular adjustable ultrasonic real-time navigation TIPS puncture instrument comprises a catheter sheath, a core-through needle catheter, a hollow core-through needle and a solid core-through needle; the core-through needle catheter penetrates through the interior of the catheter sheath; an operating handle is arranged at one end of the through core needle catheter, a traction mechanism is installed on the operating handle, and a pull wire is arranged in the catheter sheath. Real-time ultrasonic images are obtained through the ultrasonic probe, so that an operator can clearly see a needle point path, and key organs such as hepatic artery, bile duct and gall bladder are effectively avoided. The bending-adjustable puncture needle provides the capability of real-time correction in an operation, can easily cope with complex anatomical variation, can keep certain rigidity through the hardness adjusting chain after bending adjustment, improves the penetrating power of the puncture needle, prevents unpredictable mechanical deformation during liver cirrhosis liver puncture, enhances the controllability after bending adjustment, and improves the safety of liver cirrhosis. And accurate execution of the preset angle is ensured.

A core biopsy system includes a core biopsy needle device having a curvable core biopsy needle which is positionable within and movable with respect to a coaxial needle guide. Systems and methods for obtaining biopsy samples from multiple locations with a single insertion of a needle of the biopsy needle device include controlling rotation and displacement of the core biopsy needle. Additional features and methods of the invention include tracking and planning of the obtaining of biopsy samples.

The present invention features methods of manipulating subdermal fat in a treatment area. Such methods include inserting a needle (e.g., a micro-coring needle) through the dermis to the subdermal fat layer in order to excise a portion of tissue from the treatment area. These insertions result in a portion of the dermis and a portion of the subdermal fat to enter into the needle. Removal of the needle results in excision of the portion of dermis and subdermal fat that entered into the needle.

The utility model discloses a coaxial puncture needle which comprises an outer tube and an inner core needle, a clamping cap is arranged at the rear end of the inner core needle, a clamping head is arranged at the rear end of the outer tube, the clamping cap and the clamping head can be connected in a clamped mode, the inner core needle is arranged in the outer tube in a penetrating mode from back to front till the clamping head and the clamping cap are connected in a clamped mode, and at the moment, the head of the front end of the inner core needle extends out of the front end of the outer tube. The head of the front end of the inner core needle is composed of a needle tip section and a spin locking section located behind the needle tip section, the taper angle of the needle tip section is 9-15 degrees, and external threads are arranged on the side wall of the spin locking section. According to the coaxial puncture needle, due to the facts that the tip end of the head of the front end of the inner core needle is arranged to be in a pointed cone shape, the side face of the spin locking section is provided with the external threads, and the edge of the front end opening of the outer tube is machined into the cutting edge, the probability that a focus is pushed and disengaged from the needle point is reduced, and the success rate of needle biopsy is increased.

The utility model relates to a rotator cuff stitching instrument which aims to solve the problem that a puncture core needle is broken. Comprising a front suturing part, a middle conduction part and a rear handle control part, and the front suturing part comprises an end-ring-shaped upper fixed lip valve used for clamping rotator cuff tissue and a needle-tube-shaped lower movable lip valve capable of being controlled to be folded upwards; the front end of the needle-tube-shaped lower movable lip valve is communicated with an upward tubular needle head used for penetrating through the upper fixed lip valve end ring upwards, and the PDS degradable suture line penetrates out of the upward tubular needle head through the needle-tube-shaped lower movable lip valve. The upper end of the upward tubular needle head is a beveled tube head needle opening with a backward opening. And the upper part of the upward tubular needle head is bent backwards in an arc shape. The disposable puncture core needle has the advantages that the problem that the disposable puncture core needle is broken during suturing is solved, the cost of the puncture core is saved, and the damage to the rotator cuff is small.

A core needle biopsy device, including: a needle assembly, the needle assembly including a piercer and a hollow cutter, the piercer including a sharp distal tip and a notch proximal to the distal tip, the piercer being slidably disposed within the cutter to sever a tissue sample into the notch of the piercer; a drive assembly configured to selectively move the piercer and the cutter; and a tissue sample holder including a sample chamber, a fluid source, and a nozzle, the fluid source being configured to eject a liquid or gas from the nozzle and against a portion of the biopsy device to manipulate a severed tissue sample into the sample chamber.

This utility model relates to a pneumatic four-jaw crimping fixture for concentric needles, comprising a base assembly, a cylinder assembly, a solenoid valve assembly, and a pipe connector assembly. The base assembly has an air inlet on one side and includes a base plate. The cylinder assembly is located at the lower middle position of the upper surface of the base plate, and a bracket is located at the center of the cylinder assembly. The bracket is connected to a positioning assembly. A pressure head assembly is mounted on the cylinder assembly. The solenoid valve assembly is mounted on the base plate and connected to the pipe connector assembly, which in turn is connected to the cylinder assembly. This utility model connects an air source to the cylinder assembly through an inlet on the base assembly, allowing for pressure testing and adjustment of various parameters and dimensional requirements, thus achieving the crimping of the concentric needle assembly. This solves the problems of inconvenience, inaccuracy, low efficiency, and high workload in the concentric needle crimping process. The air source is connected to the cylinder assembly through an inlet on the base assembly for pressure testing and adjustment of various parameters and dimensional requirements.

The invention discloses a central cavity core rod assembly which comprises a silicone tube body and a central cavity core rod, the silicone tube body is provided with at least a plurality of cavity channels, the cavity channels comprise a central cavity channel arranged in the center of the silicone tube body and a plurality of water inlet and outlet cavity channels, the central cavity channel is used for allowing the central cavity core rod to be inserted, and the central cavity core rod is sleeved with a central cavity outer sleeve. A plurality of bending grooves are formed in the center cavity outer sleeve, a plurality of core needle holes are axially distributed in the circumference of the center cavity outer sleeve, and water inlet and outlet cavity core needles are arranged in the core needle holes, can rotate in the core needle holes and are arranged in a circumferential step mode around the center axis of the center cavity core rod. And a preset difference value exists between the lengths of the adjacent water inlet and outlet cavity core needles. A plurality of core needle assemblies are integrated on a single core rod assembly, so that one-time pressing and integral disassembly of all cavities are realized.

The present disclosure provides a biopsy device for performing soft tissue biopsy on any major organ through the venous system, and a method for using the biopsy device. The biopsy device comprises a

A core needle biopsy device includes a needle assembly, a drive assembly, and a user interface. The needle assembly includes a puncture rod and a hollow cutter. The puncture rod includes a sharp distal tip and a notch proximate the distal tip. The puncture rod is slidably disposed within the cutter to sever a tissue sample into the notch of the puncture rod. The drive assembly is configured to selectively move the puncture rod and the cutter. The user interface includes a plurality of indicators. Each of the plurality of indicators is configured to independently transition between a plurality of predetermined states to collectively define a plurality of predetermined state sequences indicating movement of the puncture rod and the cutter via a drive mechanism.

The utility model discloses a drainage catheter melting head forming device which comprises a base, a translation driving mechanism, a mold base, a core needle base and a core needle. The translation driving mechanism is arranged on the base. The mold base is arranged on the base and located at the end, in the translation direction, of the translation driving mechanism. And the core needle seat is in transmission connection with the translation driving mechanism. The core needle is provided with a large-diameter body and a small-diameter body, the large-diameter body is connected to the core needle base, the small-diameter body is connected to one end of the large-diameter body, and a reinforcing core limiting table is formed between the large-diameter body and the small-diameter body. The translation driving mechanism can drive the core needle base to drive the core needle to get close to or away from the mold base. According to the drainage catheter head melting forming device, in the drainage catheter head melting process, one end of the reinforcing core can abut against the limiting table, the translation driving mechanism drives the core needle base to move horizontally to be close to the mold base, and when the head end of a catheter is pushed into a heated mold, the limiting table limits the reinforcing core to move backwards in the axial direction; and the end part of the produced drainage catheter is good in structural hardness, good in product quality stability and few in defective products.

A core needle biopsy device includes a needle assembly, a drive assembly, and a tissue sample holder. The needle assembly includes a piercer and a hollow cutter. The piercer includes a sharp distal tip and a notch proximate the distal tip. The piercer is slidably disposed within the cutter to sever a tissue sample into the notch of the piercer. The drive assembly is configured to selectively move the piercer and the cutter. The tissue sample holder has a sample chamber and a spatula. The spatula is movable relative to the piercer and cutter to manipulate the severed tissue sample into the sample chamber.

A system and method for processing whole-slide images (WSIs) of biopsies, such as core needle or vacuum-assisted biopsies, is provided. A skeleton of the detected tissue shape is created and a skeleton path is determined. An image is generated that includes a line representing the skeleton path, with different line representations along the line representing different tissue pathologies. A pathology summary for the entire line is also prepared. This provides the information desired by the pathologist in the most convenient format and presentation.

A core needle biopsy device includes a needle assembly, a cutter drive assembly, a piercer drive assembly and an actuation mechanism. The needle assembly includes a piercer and a hollow cutter. The piercer includes a sharp distal tip and a notch proximal to the distal tip. The piercer is slidably disposed within the cutter to sever a tissue sample into the notch. The cutter drive assembly is configured to move the cutter. The piercer drive assembly is configured to move the piercer. The piercer drive assembly includes a lead screw configured to move both a portion of the cutter drive assembly and a portion of the piercer drive assembly. The actuation mechanism is configured to engage bot the cutter drive assembly and the piercer drive assembly to initiate firing of the piercer and the cutter sequentially using the cut drive assembly and the piercer drive assembly.

The application discloses a drainage catheter melt head forming device, which comprises a base, a translation driving mechanism, a mold base, a core needle base and a core needle. The translation driving mechanism is arranged on the base, and the mold base is arranged on the base and located at one end of the translation driving mechanism along a translation direction. The core needle base is in transmission connection with the translation driving mechanism. The core needle has a thick diameter body and a thin diameter body. The thick diameter body is connected to the core needle base, the thin diameter body is connected to one end of the thick diameter body, a reinforced core limiting table is formed between the thick diameter body and the thin diameter body, and the translation driving mechanism can drive the core needle base to drive the core needle to move close to or away from the mold base. In the drainage catheter melt head process, one end of the reinforced core can abut against the limiting table, the core needle base is driven by the translation driving mechanism to move close to the mold base, and when the head end of the catheter is pushed into the mold which has been heated, the limiting table limits the axial reverse walking of the reinforced core, so that the end head structure of the produced drainage catheter has good hardness, the product quality has good stability, and the defective products are few.

The invention relates to the technical field of die-casting molds, and in particular to a die-casting model core needle cooling device with adaptive cooling channel depth; the device comprises a connector, an outer tube and an inner tube, wherein the outer tube and the inner tube are coaxial and fixedly mounted on the connector, a telescopic tube is arranged inside the inner tube, and the telescopic tube can move axially relative to the inner tube; a water sealing plate is arranged at a water outlet of the telescopic tube, and a plurality of water outlet holes are opened on the water sealing plate; a limiting column is arranged on the water sealing plate; by arranging an axially telescopic telescopic tube in the inner tube, when the invention is applied to a core needle part with cooling channels of different depths, the telescopic tube can extend outward along the axial direction of the inner tube under the action of its own gravity or the pressure of water inlet, so as to adapt to cooling channels of different depths, so that core needles with different cooling channel depths can share the same type of cooling device, thereby reducing the assembly time and maintenance cost of the mold.

The invention relates to a double-color mold side sliding block embedded nut mechanism which comprises a nut taking and placing device fixed to a mechanical arm and provided with a movable end connecting and fixing assembly of a first driving piece, an extending hole is formed in the nut taking and placing device, an ejector sleeve is arranged in the extending hole, a step groove is formed in the side, making contact with the extending hole, of the ejector sleeve and used for placing and fixing a nut, and an ejector rod is arranged in the ejector sleeve; the ejector rod is connected with the second driving piece; the jig assembly is provided with a supporting plate, a first core needle is arranged in the jig assembly, the movable end provided with a sixth driving part is connected with a push plate, and the first core needle is sleeved with the push plate in a penetrating mode. The nut on the first core needle is pushed into the extending hole through the push plate on the sixth driving piece, when the nut is placed, the first driving piece firstly acts on the fixing assembly to move to the second core needle, then the second driving piece enables the ejector rod to push the nut to the second core needle, and multiple nuts of different models can be taken and placed at a time.

The application discloses a die-casting manufacturing process of a gearbox side cover containing superfine long oil channel holes, and aims at superfine long holes with a core needle length being 10-20 times of the diameter of a needle hole, and comprises the following steps: step one, mold opening, the mold is sprayed, the temperature of the core needle before spraying is 200-240 DEG C, and the temperature of the needle after spraying is 160 DEG C; step two, the oil channel hole core needle is inserted into the mold, and after the mold is closed, the aluminum liquid is poured into the tank; step three, the aluminum liquid is filled into the ingate at a low speed of 0.3 m / s, then the product cavity is filled at a high speed of 4 m / s, after the filling is completed, the pressure is increased at a specific pressure of 70 MPa, the pressure increasing time is 8 s, and the product cooling time is 8 s; the superfine long core needle is cooled after the aluminum liquid is filled for 3 s, the cooling time is 15 s, and the water pressure is 10 kg / cm2; step four, after the product cooling is completed, the core needle is pulled out, and the product is ejected after the mold is opened. Through improvement of the material and structure of the superfine long oil channel hole core needle and optimization of the die-casting forming pouring scheme, the die-casting stability and reliability are improved, and the die-casting manufacturing and stable production of the gearbox side cover with superfine long oil channel holes are realized.

A double-shot biopsy gun, comprising an inner core needle, an outer tube needle and a rear-end ejection device. The rear-end ejection device includes an upper housing, a lower housing and a slider. Corresponding chutes are provided inside the upper housing and the lower housing. One end of the slider is arranged in the chute and can move along the chute. An inner core needle firing assembly and an outer tube needle firing assembly are arranged inside the lower housing. A first button assembly and a second button assembly are arranged inside the upper housing. The slider abuts against the inner core needle firing assembly and the outer tube needle firing assembly and can press the inner core needle and the outer tube needle to a depressed state. Compared with the prior art, for lesion tissues with sufficient safety space, the present invention can achieve one-key operation to complete the step-by-step firing of the inner core needle and the outer tube needle. In the case of insufficient safety space for manipulation, the inner core needle can be fired in place first, then extended from the pre-positioned cannula needle channel, and the distance of the extended cannula needle can be gradually controlled, so as to effectively control the walking displacement in the lesion area.

A core needle biopsy device includes a needle assembly, a drive assembly, a tissue collection area, and a tissue sample holder. The needle assembly includes a piercer and a cutter. The piercer includes a notch proximate a distal tip thereof. The piercer is slidably disposed within the cutter to sever a tissue sample. The drive assembly is configured to selectively move the piercer and the cutter. The tissue collection area is configured to interface with the piercer to facilitate manipulation of the tissue sample relative to the notch. The tissue collection area defines a first engagement ridge, a second engagement ridge and a recessed portion disposed therebetween. The tissue sample holder has a sample chamber, a driver, and a wiper. The driver is configured to move the wiper into engagement with the first engagement ridge and the second engagement ridge to manipulate the tissue sample into the sample chamber.

The utility model provides a kind of exhaust structure of upper link plate product mould core needle, including core needle, core needle is arranged with exhaust passage along its axial direction, the outer surface of the end of core needle is opened with recess along circumference direction, and the depth of recess is 0.03-0.1mm;Exhaust structure in the scheme is by in the end area of core needle most easily gas, process out the recess of depth less than the critical penetration depth of metal liquid, utilize the micro gap cooperation between the recess and its mounting hole, jointly form a narrow channel that only allows gas molecules to pass through and blocks metal liquid (or only allows to form very thin flash), this channel guides the high-pressure gas trapped near core needle to the main exhaust system of mould, finally, exhaust outside mould, to effectively reduce the blowhole defect of casting in this area, improve filling effect.

This application provides an ultrasonic-assisted forming method for capillary glass tubes used in optical inspection, applied to a forming apparatus including an ultrasonic base and a metal core needle. After preheating the forming apparatus to a first temperature, molten glass is poured in, causing it to coat the core needle and tend to form a transiently solidified layer. An acoustic model is established by collecting the effective working length of the core needle and the material's acoustic parameters. Based on the acoustic model and considering the critical energy density required to destroy the transiently solidified layer and the effective glass forming time, the acoustic energy output parameters of the core needle are determined. According to these parameters, high-frequency ultrasound is continuously applied through the ultrasonic base during the cooling process of the glass from the molten state to a second temperature, causing the core needle to vibrate to destroy and suppress the transiently solidified layer. The ultrasound is then turned off. This method can reduce interfacial stress concentration, suppress the formation of microcracks on the inner wall, and improve the smoothness of the inner wall of the capillary glass tube as well as its optical and mechanical properties.

The coaxial needle provided by the present application includes a core needle and a shell needle arranged around the core needle, the core needle extends one end distance from the shell needle, the core needle can extrude a core sacrificial ink material, and the shell needle can extrude a shell ink material. The above coaxial needle can form a bifurcated structure by using a material with similar rheological properties to puncture the pipe wall on a section of the printed pipe structure as needed and then fill and heal it. In addition, the present application also provides a three-dimensional printing method based on the above coaxial needle and its application.

A core needle biopsy device includes a needle assembly, a cutter drive assembly, a piercer drive assembly, and a latch mechanism. The needle assembly includes a piercer and a hollow cutter. The piercer including a sharp distal tip and a notch proximate the distal tip. The piercer being slidably disposed within the cutter to sever a tissue sample into the notch of the piercer. The cutter drive assembly is configured to move the cutter. The piercer drive assembly is configured to move the piercer. The piercer drive assembly includes a lead screw. The lead screw is configured to move both a portion of the cutter drive assembly and a portion of the piercer drive assembly. The latch mechanism is configured to selectively couple a portion of the cutter drive assembly to a portion of the piercer drive assembly.

The utility model discloses a needle electrode needle body which comprises a needle body part and a solid needle fixedly connected to the needle body part, the upper surface of the needle body part is provided with a plurality of sunken parts which are sunken towards the lower portion of the needle body part side by side, the solid needle is provided with a plurality of protruding parts side by side, and the protruding parts are fixedly connected into the sunken parts respectively. The solid core needle has the advantages that the concave portion and the protruding portion which are fixedly connected are arranged to reinforce fixation of the needle body portion and the solid core needle, due to the fact that the needle body is usually stressed in the axial direction, the concave portion can reduce axial stress of the connecting portion of the needle body and the solid core needle and play a buffering role, and a sand blasting process can be adopted for the connecting portion of the concave portion and the protruding portion. The solid core needle is prevented from being separated from the needle body part.

The application discloses a method for preparing islet microspheres by using gas microflow, the islet microspheres and application, and the preparation process of the islet microspheres is as follows: after centrifugation of islet cells, the islet cells are resuspended by using a core layer ion crosslinking type hydrogel material A to obtain a cell-containing hydrogel material A; the cell-containing hydrogel material A and gas are respectively pushed out through a core needle and a shell needle of a coaxial needle head, under the shearing of the gas, the cell-containing hydrogel material A is cut into microsphere droplets, and the microsphere droplets fall into a receiving area C to be solidified to obtain core microspheres; the core microspheres are resuspended by using a shell layer amphiphilic ion hydrogel material B containing a photoinitiator to obtain a core microsphere-containing hydrogel material B, the core microsphere-containing hydrogel material B and gas are respectively pushed out through the core needle and the shell needle of the coaxial needle head, under the shearing of the gas, the core microsphere-containing hydrogel material B droplets fall into a receiving area D to be photo-cured to obtain islet microspheres. The islet microspheres disclosed by the application are controllable in diameter and have good biocompatibility.

The utility model relates to puncture tool technical field, concretely for bone marrow puncture needle, including needle tube, needle tube is used for puncture extraction bone marrow, the lower extreme of needle tube is installed with needle tube seat, the inside of needle tube is provided with core needle, the lower extreme of core needle is installed with core needle seat, the end of adjusting sleeve is provided with inclined annular surface to adapt the use condition of 45 degree -60 degree inclined needle insertion of sternum bone marrow puncture, core needle seat is equipped with the lock catch, the limiting block is set up on needle tube seat, when the tip of core needle is pressed, the lock catch is hooked needle tube seat through the cooperation with limiting block, prevents core needle from retreating, the convex point is equipped on core needle seat for preventing core needle seat from rotating freely and taking out. In the bone marrow puncture needle, the inclined annular surface of adjusting sleeve end head, perfect adaptation 45 degree -60 degree inclined needle insertion of sternum bone marrow puncture use condition, solve the problem that the small observation field of operator can be observed when the traditional puncture needle punctures, and the discomfort of patient skin, make puncture operation more accurate, convenient.

The utility model relates to the technical field of medical liquid bags, and discloses medical liquid bag making equipment which comprises a core needle which is movably arranged and used for inserting a catheter section, a film layer feeding structure used for conveying two film layers which are arranged up and down, and a welding machine used for welding the two film layers to form a bag body. After the catheter section is arranged between the two film layers through the core needle, the two film layers are welded and formed through the welding machine, the catheter section is inserted into the end of the bag body, and the bag body and the catheter section form the medical liquid bag. The catheter section is inserted into the core needle, after the catheter section is arranged between the two film layers through the core needle, the welding machine welds the two film layers to form the bag body, the catheter section and the bag body are connected into a whole, the medical liquid bag is formed, the whole bag making process is simple, automatic bag making is achieved, and the bag making efficiency is high.

A core needle biopsy device includes a body, a needle assembly and a drive assembly. The needle assembly extends distally from the body and includes a piercer, a hollow outer cannula, and a cutting element. The outer cannula defines an internal lumen. The piercer is disposed within the outer cannula. The cutting element extends along an outer surface or an inner surface of the outer cannula. The cutting element is configured to translate relative to the outer cannula. The drive assembly is configured to selectively move one or more of the piercer, the outer cannula, and the cutting element. The drive assembly is further configured to move the piercer relative to the outer cannula to open and close the internal lumen defined by the outer cannula.