21 results about "Core needle" patented technology

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.

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.

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 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 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 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.

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 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.

Implementations include methods and systems for recovering an analyte from a tissue sample extracted via a core needle biopsy. The method may involve immersing the core needle holding the tissue sample in a sterilized buffer solution without formalin. Swirling of the needle may dislocate the tissue core and cells for creation of an intermediate mixture. This mixture may be filtered using a strainer into a sample tube to separate the tissue core resulting in another intermediate mixture. Equal volume of a cell lysis and stabilization reagent may be added to this mixture to yield a third mixture containing lysed dislodged cells. The assessable analyte, unexposed to formalin, may then be isolated. The system for this procedure may include a core needle, a buffer container, a sample tube, a strainer and a potential container for tissue core storage. The analyte could be DNA, RNA, an exosome, or a protein.

The utility model discloses a kind of plug core needle outer diameter processing frock, comprising: clamping block, lock cylinder is installed, for compacting fixed plug core needle;Rear cover, with clamping block detachably connected, for abutting limit plug core needle;Wherein, clamping block inside is equipped with multiple first fixed cavities, lock cylinder is inserted in a group of first fixed cavities.The utility model is connected by locking member in clamping block and rear cover, clamping block inside is equipped with fixed cavity of different diameters, and after the lock cylinder of fan ring shape is inserted, it is formed to place cavity, the clearance groove of rear cover is abutted with the end of inserted plug core needle, and the middle part of plug core needle is then fixed by the locking member of clamping block top abutment, can be firmly clamped slender plug core needle, avoid to appear to shake when processing, effectively improve yield.

The invention discloses an injection mold, an injection molding method and a long PIN connector. The injection mold comprises an upper mold, a lower mold, a first core needle, a second core needle and a side core, wherein the first core needle and the second core needle coaxially extend into a mold cavity at intervals, and the side core is connected with the two core needles in a sealed mode in the axial direction. The injection molding method is realized through mold closing, core needle installing, side core inserting and sealing and injection molding. The connector plastic shell comprises a first terminal hole / second terminal hole corresponding to the core needle and a communicated terminal groove, and the terminal is inserted into a channel formed by the connector plastic shell, the core needle and the terminal groove. According to the scheme, 'two-end + middle 'three-point limiting of the terminal can be realized without extending the core needle, the strength and the limiting effect of the core needle are considered, overflow is blocked by the side core, and the precision of the plastic shell is improved. And the product percent of pass and the signal transmission reliability are obviously improved.

The invention discloses a portable skin biopsy gun. The portable skin biopsy gun comprises a mounting base, a launching base, two hammers, two triggering units and two elastic pieces, wherein the hammers, the triggering units and the elastic pieces are in one-to-one correspondence. The launching base is mounted on the mounting seat; an inner launching groove is formed in the launching base, and the inner launching groove comprises a needle tube section, a sliding section and a power section in the first linear direction; the biopsy needle is installed on the needle tube section and extends into the sliding section. The two hammers are slidably connected to the sliding section in the first linear direction, and the front ends of the hammers are aligned with an outer sheath needle and an inner core needle in the biopsy needle respectively. The trigger unit is movably connected to the mounting seat, and the working end of the trigger unit extends into the sliding section and extends into a first positioning hole / second positioning hole formed in the side wall of the corresponding outer sheath needle / inner core needle. The elastic piece is installed on the power section and connected with the driving hammer and the launching base, and when the trigger unit enables the working end of the trigger unit to retreat from the first positioning hole / the second positioning hole under the action of external force, the elastic piece drives the driving hammer to slide forwards and pushes the outer sheath needle / the inner core needle to move forwards.

The utility model belongs to the technical field of medical instruments, and discloses a biopsy gun with double firing buttons and a self-locking function, which comprises a shell and a needle tube assembly, an inner core needle, a cutting tube and an outer sleeve are coaxially nested from inside to outside, and a pushing piece, a cutting needle tube fixing piece, an elastic assembly and the firing buttons are arranged inside and outside the shell. The cutting tube and the outer sleeve are fixedly connected with the cutting needle tube fixing part and elastically connected with the bottom of the near end of the shell through the elastic assembly, the pushing part is arranged on the outer side of the cutting needle tube fixing part and can drive the cutting needle tube fixing part to move towards the near end and compress the elastic assembly to enable the device to be in a winding state, and the excitation button is arranged on the end face of the near end of the shell. The excitation button is used for exciting the cutting needle tube fixing piece to emit, and the pushing piece is connected with the excitation button and can also excite the cutting needle tube fixing piece to emit. The percussion button is additionally arranged on the end face of the near end of the shell, limitation of the angle of a biopsy gun is avoided, operation of an operator is facilitated, and different biopsy operation requirements can be met.

The application provides a preparation device and method of a multi-side plug-in core needle. The preparation device of the multi-side plug-in core needle comprises a first auxiliary plate and a second auxiliary plate, a plurality of first auxiliary holes are arranged on the first auxiliary plate, and a plurality of second auxiliary holes are arranged on the second auxiliary plate. The preparation device of the multi-side plug-in core needle can prepare the multi-side plug-in core needle only by arranging the plurality of first auxiliary holes on the first auxiliary plate and the plurality of second auxiliary holes on the second auxiliary plate. The device does not involve professional knowledge reserve requirements in the process of preparing the multi-side plug-in core needle, and the manufacturing process is fast and convenient, which simplifies the processing process and reduces the cost to the greatest extent. Meanwhile, the device can prepare the multi-side plug-in core needle with different fiber spacings by selecting the first auxiliary holes with different spacings, so that the operation of subsequent experimental personnel is facilitated while the experimental requirements are ensured.

The present application relates to the technical field of diaphragm air tightness testing tools, in particular to a diaphragm product with a center hole air tightness testing structure without pre-penetrating an inner core, which comprises an upper mounting plate and an upper jig plate fixedly installed on the bottom surface of the upper mounting plate, a pressing assembly is arranged in the mounting hole, the pressing assembly comprises an upper positioning core shell installed in the mounting hole, a sliding seat is slidably connected in the upper positioning core shell, an upper positioning core is installed on the bottom surface of the sliding seat, a spring is arranged on the top surface of the sliding seat, a lower movable mold plate is arranged below the upper jig plate, a plurality of placed punch molds are fixedly installed on the upper surface of the lower movable mold plate, an inner hole is arranged in the placed punch mold, an air passage assembly comprises a lower positioning core shell arranged in the inner hole, a lower positioning core needle head is fixedly installed on the top surface of the lower positioning core shell, and an air inlet hole is arranged in the lower positioning core shell. The present application is convenient to operate, saves the process of manually placing the diaphragm on the inner core, and is beneficial to improving the testing efficiency.

A kind of assembly method of pure iron core needle selector, comprising the following steps;Step one, assemble electromagnet, split type fixing seat;Step two, glove machine needle plate is fixedly installed on split type fixing seat;Step three, spring needle is fixed on glove machine needle plate by fixed shaft, it is convenient to adjust all spring needles simultaneously, improve assembly, debugging efficiency;Step four, the support foot of spring needle is installed to the spring needle card slot of glove machine needle plate, then the fixed shaft is pre-fixed on glove machine needle plate, so that each spring needle can work independently;Step five, in unpowered state, slightly shake needle selector, observe whether spring needle is attracted to electromagnet, if there is no spring needle is attracted by electromagnet, then next step, step six, in unpowered state, press spring needle in turn, if all spring needles can be attracted on electromagnet, fixed shaft is fastened.

The present disclosure provides systems and methods for recovering an assessable analyte potentially including DNA, RNA, an exosome or a protein from a tissue sample including a tissue core and dislodged cells. In an embodiment, the method utilizes a used biopsy needle after it has harvested a tissue core and dislodged cells are on the needle. The method includes placing the needle into a buffer solution to form a first intermediate mixture comprising the buffer solution, the tissue core, and the dislodged cells, filtering the first intermediate mixture to separate the tissue core from the first intermediate mixture, yielding the tissue core and a second intermediate mixture comprising the buffer solution and the dislodged cells, and adding a cell lysis and stabilization reagent not including formalin to the second intermediate mixture, yielding a third mixture comprising lysed dislodged cells from which the assessable analyte can be retrieved.