31 results about "Needle track" patented technology

The invention discloses a puncture needle track prediction method, system and device and a medium. The method comprises the following steps: acquiring continuous photoacoustic imaging image data when a puncture needle punctures in tissue; processing the photoacoustic imaging image data, extracting a needle point position, and converting each frame of image data into a feature vector about the needle point position; a Transformer model is established, the input quantity of the model is the feature vector of past image data about the position of the needle tip and priori knowledge, and the output quantity of the model is the center coordinate of the needle tip of future image data and the insertion angle of the needle tip in the surrounding tissue. Through data enhancement and constraint injection, a pure data driven model can fuse physical laws and clinical experience, finally real-time and accurate prediction of the motion trail of the puncture needle is achieved, medical employees can be helped to more accurately control the path of the puncture needle in a complex operation environment, the misoperation risk is reduced, and the operation efficiency is improved. And the safety and the accuracy of medical puncture operation are obviously improved.

This application relates to the field of medical devices and discloses a needle withdrawal system for radiofrequency ablation devices that avoids scarring. Based on a standard radiofrequency ablation device, the system integrates a needle position detection device (real-time monitoring of depth and speed) and a needle tip temperature sensor. During needle withdrawal, the radiofrequency power is dynamically adjusted according to the withdrawal speed (higher power for faster speed); when the needle tip depth is less than a predetermined threshold (close to the body surface), the radiofrequency output is automatically stopped and a prompt to wait for cooling occurs; once the temperature drops below a safe threshold, a prompt indicates that the needle can be completely withdrawn. Through this closed-loop control, the thermal coagulation and end-point cooling processes of the needle track are precisely managed, effectively preventing thermal damage to the skin and subcutaneous tissue and significantly reducing scar formation.

A suturing mechanism and a surgical robot, the suturing mechanism comprising a suturing needle and a suturing assembly, the suturing assembly comprising a needle track and a suturing needle driving mechanism. The needle track allows the suturing needle to pass through, and the suturing needle driving mechanism drives the suturing needle to move in the needle track; the suturing assembly comprises a first suturing assembly and a second suturing assembly which are spaced apart and opposite to each other, so that the first needle track of the first suturing assembly and the second needle track of the second suturing assembly are spaced apart and opposite to each other to form a suturing track; the first suturing needle driving mechanism of the first suturing assembly and the second suturing needle driving mechanism of the second suturing assembly drive the suturing needle to move in the suturing track alternately; one of the first needle track and the second needle track is in a minor arc shape, and the other is in an arc shape. The suturing mechanism enables the suturing needle to be guided and constrained on both sides of the tissue to be punctured, so that the motion track of the suturing needle can be kept stable, thereby improving the puncture effect.

The invention belongs to the technical field related to master-slave control of medical equipment, and discloses a puncture needle track prediction and master-slave control method based on force measurement, which comprises the following steps of: (1) measuring bending moment and transverse force in two orthogonal planes of a puncture needle tail end coordinate system and axial force along a puncture needle in real time; (2) calculating to obtain a simulation load loaded on the interaction part of the puncture needle and the soft tissue; (3) respectively solving the predicted positions of the puncture needle on the two corresponding orthogonal planes; and (4) the predicted position and the expected position are subtracted, the obtained difference value is multiplied by a proportionality coefficient to obtain two pieces of force sense information, then the two pieces of force sense information and the axial force are transmitted to the master-end operation equipment, the master-end operation equipment carries out force sense reproduction according to the received information, the force sense information serves as an operation instruction of an operator to the slave-end robot, and the operation instruction of the operator to the slave-end robot is completed. And the attitude of the slave end robot is controlled to reduce the difference value between the predicted position and the expected position. According to the invention, the real-time performance is improved.

A circular knitting machine structure includes a plurality of needles and a plurality of sinkers. Each of the needles is controlled to move in one of a first half needle track and a second half needle track. The first half needle track has a take-down point later than the take-down point of the second half needle track. Each of the sinkers forms an inclined surface on a side facing each of the needles. Each of the needles knits a face yarn and a ground yarn. When one of the needles moves in the first half needle track, the face yarn does not change position and a normal loop is formed. When one of the needles moves in the second half needle track, the face yarn temporarily rests on the inclined surface of one of the sinkers and changes position relative to the ground yarn, thereby forming a yarn changing loop.

The present invention discloses a laser-assisted positioning and guiding platform template system for surgical use, including a slideway, on which a fixing frame is movably arranged along the slideway, a fixing arm that can move up and down along the fixing frame is clamped on the fixing frame, a guiding platform is detachably installed at one end of the fixing arm away from the fixing frame, and a needle track template is detachably installed in the guiding platform; the present invention can stably clamp the needle track template to avoid popping out and displacement; the fixing arm has a high degree of freedom of movement and can achieve single-point locking and overall fixation, shortening the system preparation time before implantation and improving work efficiency; the spiral fine-tuning fixing point can be used for angle fine-tuning of the guiding platform and intraoperative support; the green laser emission point is located on the X-axis of the needle track template, and under this guidance, it can cooperate with the CT red laser positioning line to quickly locate the tumor area; the physical level combined with the electronic inclinometer adsorbed by the magnetic point can accurately level and adjust the required angle.

A new type of computerized flat knitting machine's mountain plate includes a cam motherboard, a needle selection mother needle, a central cam, a guide cam, a wing cam, and a pin guard. The cam motherboard is equipped with a mesh cam, a needle guard cam, a transfer cam, and a knitting cam. The transfer cam consists of upper and lower transfer cams. Needle track I is defined between the upper transfer cam and the needle guard cam, needle track II is defined between the upper and lower transfer cams, and needle track III is located at the bottom of the lower transfer cam. The pin guard, knitting cam, wing cam, and central cam together form needle track IV, and needle track V is defined between the wing cam and the central cam. Guide slopes A are located on the adjacent sides of the wing cam and the central cam. While ensuring that the knitting needle assembly can perform various actions on the fabric, the present invention eliminates the non-woven pressing plate, the three leg press cams above it, and the complex drive mechanism. This simplifies the overall structure, avoids wear on the stitches, reduces the failure rate, reduces the machine head's workload, and saves manufacturing costs.

The utility model discloses a corrosion-resistant cam for a knitting machine. The corrosion-resistant cam comprises a cam main body, a needle running track, a mounting hole, a corrosion-resistant functional layer and a reinforcing functional layer, the anti-corrosion functional layer is arranged on the surface of the triangular main body, the zinc coating is electroplated on the surface of the triangular main body, the epoxy anti-corrosion coating is sprayed on the surface of the zinc coating, and the epoxy anti-corrosion coating can be matched with the zinc coating to further improve the surface anti-corrosion performance of the triangular main body, so that the service life of the triangular main body is prolonged; the reinforcing functional layer is arranged on the inner wall of the needling track, the reinforcing coating is sprayed on the inner wall of the needling track, so that the strength of the inner wall of the needling track can be enhanced by the reinforcing coating, the wear resistance of the inner wall of the needling track is improved by spraying the wear-resistant coating on the surface of the reinforcing coating, and the inner wall of the needling track is not prone to being damaged by friction with a knitting needle; the lubricating coating is sprayed on the surface of the wear-resistant coating, so that the trafficability of the knitting needle in the needle running track is improved.

The application belongs to the technical field of medical devices, and relates to an electrode assembly for preventing needle track bleeding and hemostatic devices thereof, comprising an electrode needle, an insulating tube and a control member; the electrode needle comprises, from far to near, an insulating needle head, an electrode one, an insulating member and an electrode two, the electrode one and the electrode two are opposite in polarity; the proximal end of the electrode two is wrapped with an outer insulating layer; the insulating tube is sleeved on the outside of the electrode needle, the distal end of the insulating tube is a cutting edge, and the side of the insulating tube is provided with a coagulation cutting window; the control member is connected with the insulating tube to control the rotation and / or axial movement of the insulating tube; when the insulating tube is located at the farthest end, the single side of the electrode one and the electrode two is exposed through the coagulation cutting window, and the insulating needle head is exposed; when the insulating tube is located at the nearest end, the electrode one and the electrode two are completely exposed. The application solves the technical problem that the prior art is prone to causing needle track bleeding.

The present application relates to braiding equipment technical field, especially to a kind of reverse package cutting circle plush jacquard machine, which can weave out stronger three-dimensional sense, and the appearance of plush braided product is high, including rack, big disc gear, feed yarn nozzle, needle cylinder, sinker ring, upper cam seat, upper cam, lower cam seat, lower cam, needle selector, knitting needle, jacquard piece, hanging wool piece, reverse package piece and cutting wool piece, knitting needle is arranged in the needle slot of needle cylinder, knitting needle has knitting needle butt, lower cam seat is arranged on the circumference outside of needle cylinder, lower cam is arranged on lower cam seat, lower cam has at least one knitting needle track, for transforming different weave technology, knitting needle butt of knitting needle is embedded in knitting needle track, sinker ring is arranged on the upper end of needle cylinder, jacquard piece, hanging wool piece, reverse package piece and cutting wool piece are all arranged in the needle slot of sinker ring, hanging wool piece is connected with jacquard piece, reverse package piece and cutting wool piece are arranged in the middle groove of jacquard piece and hanging wool piece, and cutting wool piece is located on reverse package piece.

This utility model discloses a breathable double-sided waffle knitted fabric with an outer and inner layer structure. Both the outer and inner layers are waffle structures with a raised and recessed network. The recessed patterns of the outer and inner layers are perpendicular. The fabric has a knitting structure with one needle track on the upper needle plate and one needle track on the lower needle cylinder. The knitting pattern consists of four rows forming a complete knitting cycle. According to the arrangement of the upper needle plate to the lower needle cylinder, the four rows of patterns are: the first and second rows are loops, loops; the third and fourth rows are floats, loops. The above-mentioned breathable double-sided waffle knitted fabric has a reasonable structure and a raised and recessed knitting structure. Through the perpendicularity of the recessed patterns of the outer and inner layers, small air cavities are formed. It has heat retention when static and good breathability, air circulation, and rapid heat dissipation when in motion.

The utility model relates to the technical field of jacquard machines, in particular to a high-density cutting loop-pile jacquard machine. A rotating frame is installed on the upper portion in the machine frame, an upper needle dial and a lower needle cylinder are installed in the machine frame, a fixing frame is installed on the machine frame, a groove crochet hook rail base is installed on the fixing frame, a groove crochet hook rail is installed on the side face of the groove crochet hook rail base, a plurality of groove crochet hooks are installed on the lower needle cylinder, and the groove crochet hooks are matched with the groove crochet hook rail. A groove is formed in the middle of the groove crochet hook, a lower cutter is arranged in the groove, a lower cutter rail is installed on the groove crochet hook rail base, and the lower cutter rail is matched with the lower cutter. According to the utility model, the lower cutter is extended and retracted through the lower cutter track, and if the groove crochet hook hooks the looped pile and the lower cutter extends upwards, the looped pile can be cut off to form a plush effect, so that the groove crochet hook can be made into towels, warm-keeping cloth and the like.

Devices and methods for suturing are disclosed. An illustrative suturing device includes a housing defining an arced needle track having a first end and a second end, the housing defining a gap between the first end of the arced needle track and the second end of the arced needle track that extends inwardly into the housing to receive a tissue sample therein for suturing. The arced needle track is configured to receive an arced needle therein. The housing further defines an arcuate guide track to receive at least a portion of a needle drive of the suturing device. The suturing device further includes a needle drive configured to advance the arced needle along the arced needle track along a first direction. The needle drive includes a drive filament and a needle engagement surface. The drive filament is directed around and at least partially surrounds the gap of the housing.

The invention discloses a pattern sewing machine auxiliary device for garment production, and relates to the technical field of pattern sewing machines, the pattern sewing machine auxiliary device comprises a workbench, the workbench is fixedly provided with a slide rail rod through an electric telescopic rod, and the slide rail rod is slidably provided with a control block. Through cooperation of the first torsion spring, the shifting rod and the shifting fork, the upper die automatically rotates to avoid a machine needle track at the last sewing stage, the needle breaking risk is fundamentally eradicated, by means of a flexible pressing structure of the pressing block and the spring piece, the fixing requirements of small standard pieces with different thicknesses are met, the standard pieces are prevented from being crushed or shifted, and the production efficiency is improved. The oblique angle of the push rod triggers rigid connection with the clamping assembly, synchronous sliding of the control block and the moving piece is achieved, it is ensured that the label piece and lining cloth are accurately sewn according to a preset track, automatic operation and anti-interference protection of the clothes label nailing process are achieved, the problems of potential safety hazards caused by manual pressing of the label piece and needle breakage caused by collision of a machine needle to an upper mold are effectively solved, and the production efficiency is improved. And a turning rod is matched with a second torsional spring, so that the standard parts are prevented from sliding off during feeding, and finished products can be conveniently taken out.

Implementations of methods related to suturing devices are provided. A suturing device includes a housing defining an arcuate needle track having a first end and a second end and a gap between the first end and the second end of the arcuate needle track. The suturing device also includes a drive system to advance an arcuate needle along the arcuate needle track, the drive system including a drive member operably coupled to an elongate flexible member. The elongate flexible member can be reciprocated on at least one support surface that directs the elongate flexible member from a first path laid in a first plane parallel to a centerline of the arcuate needle track to a second path laid in a second plane different from the first plane.

The utility model relates to the field of circular knitting machines, in particular to a triangular seat capable of quickly switching knitting needle tracks, which comprises a triangular seat, a plurality of placing ports are arranged on the end face of the triangular seat, replacement blocks are arranged in the placing ports, and a needle pressing triangular block is arranged on the mounting face of the triangular seat. A matched adjusting opening is formed in the position, opposite to the containing opening, of the needle pressing triangular block, and an adjusting groove is formed in the triangular base installation face. According to the utility model, the matched needle pressing triangular block is mounted on the mounting surface of the triangular seat, then the triangular seat is mounted on the circular knitting machine, the replacement block is replaced through the placement opening, and the original replacement block of the replacement block is replaced by other shapes and then is inserted into the replacement block to be aligned with the adjusting opening, so that the original motion trail is changed; the needle pressing triangular block does not need to be replaced tediously after the whole triangular base is detached, and the situation that fabric is damaged due to the fact that installation is not in place is avoided.

Devices and methods for minimally invasive suturing are disclosed. An illustrative device includes a housing defining an arced needle track therein, the arced needle track having a first end and a second end separated by a gap in the housing configured to receive a tissue segment to be sutured, the arced needle track being configured to receive an arced needle therein. The device further includes a needle drive configured to drive the arced needle along the arced needle track in a first rotational direction, the needle drive being configured to releasably engage the arced needle and advance the arced needle along the arced needle track in the first rotational direction.

The present invention relates to the technical field of knitting equipment, and particularly to a three-position two-color jacquard plush machine capable of realizing two-high and two-low hair knitting of two raw materials on the same path, including a frame, a driving component, a knitting component and a yarn feeding component arranged on the frame. The knitting component includes a needle plate, knitting needles, an upper cam holder, upper cams, a needle cylinder, a lower cam holder, lower cams, latch needles, cutters, sinkers, jacquard blades, a selector and a sinker auxiliary device. The needle plate has needle grooves, and the knitting needles are arranged in each needle groove. The upper cams have knitting needle tracks for the needle feet of the knitting needles to slide. The needle cylinder has latch cutter grooves, and the latch needles, cutters and sinkers are arranged in the latch cutter grooves. The sinkers are arranged on the lower side of the latch needles and are movably connected to the latch needles. The selector is arranged on the outer side of the jacquard blades and is connected to the jacquard blades. The sinker auxiliary device is arranged on the periphery of the knitting needles. The sinker auxiliary device includes a sinker cam and sinkers. The sinker cam has sinker tracks for the needle feet of the sinkers to slide.

The application discloses a cam plate device, a knitting needle assembly and a knitting method of a computerized flat knitting machine, which comprises a cam plate, a knitting unit, a pressing piece unit and a needle selection unit, the knitting unit is arranged on the upper part of the cam plate, the pressing piece unit is arranged on the middle part of the cam plate, and the needle selection unit is arranged on the lower part of the cam plate; the knitting unit comprises a dish-shaped cam and a turning cam, the dish-shaped cam is fixedly arranged on the cam plate, the turning cam is telescopically arranged above the dish-shaped cam, the surface of the dish-shaped cam is provided with a needle receiving needle track, and both sides of the surface of the dish-shaped cam are provided with air clearance grooves, and a guide rail is arranged between the air clearance grooves and the needle receiving needle track. The dish-shaped cam and the knitting needle assembly are newly designed, the structure of the dish-shaped cam and the knitting needle assembly is greatly simplified, the production cost is reduced, the needle selection speed is improved, the work efficiency is greatly improved, and the needle is more stable and smooth.

Tissue-cutting devices and methods thereof, where a tissue-cutting device is coupleable with a catheter. The tissue-cutting device includes a blade that cuts the skin during insertion of the device in a needle track to enlarge to needle tract. The tissue-cutting device is configured for lateral separation from the catheter and / or a guidewire. The tissue-cutting device includes a channel for receiving the catheter and / or a guidewire. The channel can be configured to (i) retain the catheter / guidewire within the channel in the absence of a deliberate action by the clinician and (ii) facilitate lateral removal of the catheter / guidewire from the channel in response to the deliberate action. A catheter assembly includes a catheter coupled with the tissue-cutting device. The tissue-cutting device may include a sheath extending along a distal portion of the tissue-cutting device.

The present application relates to an adaptive track sewing machine, comprising a frame, a clothing template, a sewing head and a sewing table. The clothing template comprises an upper die frame and a lower die frame. The upper die frame is lifted along the Z-axis by a first lifting mechanism and moved along the X-axis by a first reciprocating mechanism. The lower die frame is moved along the X-axis by a second reciprocating mechanism. The sewing head is moved along the Y-axis by a third reciprocating mechanism. The upper and lower die frames are respectively provided with first and second sliding groove structures and slidable clamping plates, which cooperate with a detachable adjusting rod assembly to automatically adjust the position of the clamping plates. First and second limiting mechanisms (including wave bead screws and tooth structures) lock the position of the clamping plates. The sewing table is lifted along the Z-axis by a second lifting mechanism to avoid adjustment interference and assist in supporting the clamping plates. This scheme can complete needle track adjustment without disassembling the template, improving efficiency and accuracy and realizing "one board, multiple uses".

The present application discloses a pitch fine-tuning mechanism for a puncture device, which includes an adjustment seat fixedly installed on a positioning puncture mechanism and at least one guide rail fixedly installed on a frame for supporting the positioning puncture mechanism. The axial direction of the guide rail is consistent with the pitch side of the puncture device. The adjustment seat is slidably arranged on the guide rail, and an adjustment unit is arranged on the frame for adjusting the relative position between the adjustment seat and the guide rail. Springs for maintaining the balance of the adjustment seat are sleeved on at least one end of any one of the guide rails. The pitch fine-tuning mechanism provided by the present invention can eliminate the initial origin zero adjustment of the puncture mechanism after installation, eliminate installation errors, make the initial positioning origin direction of the puncture device coincide with the vertical direction, ensure that no installation error is introduced into any needle track during the positioning puncture process of the puncture device, and improve the positioning puncture accuracy.

Implementations of a needle loader and related methods are provided. The needle loader comprises a housing, a movable arm disposed within the housing, and a needle mount defined on the movable arm to releasably attach to an arced suturing needle. The needle loader further includes an arced needle releasably attached to the needle mount. The needle can be held in place on the needle mount by way of an interference fit. The needle mount can be defined on a surface of the movable arm that faces an arced needle track of a suturing device when loading an arced suturing needle in the needle track of the suturing device.

The inventions provided herein relate to tissue markers and uses thereof, e.g., to mark a target tissue site (e.g., a biopsy site in a breast tissue) or to produce a cell scaffold. The tissue markers described herein are designed to be resistant to fast migration (e.g., immediate migration after implantation through a needle track) and slow migration (e.g., over an extended period of time) upon implantation at a target tissue site (e.g., a biopsy site in a breast tissue), without using an adhesive. Additionally or alternatively, the tissue markers described herein can be readily detectable by at least one imaging modality, e.g., but not limited to magnetic resonance imaging, X-ray imaging, ultrasound imaging, or a combination thereof.

The invention discloses an air bag sewing path optimization method and system based on visual identification, and the method comprises the steps: collecting a cloth image through an industrial camera in combination with a polarized light source, carrying out the graying, histogram equalization and edge enhancement processing, recognizing a bar code region on the cloth through a multi-modal detection algorithm, and outputting the boundary and direction information of a polygon. And the bar code area is projected to a machine tool coordinate system through hand-eye calibration, and a gap-forbidden mask is dynamically generated in combination with a height difference. In the path planning process, a reference sewing track and a seam forbidding mask are overlapped, a path searching and spline smoothing method is adopted to generate an obstacle avoidance track, and curvature and feeding speed constraints are set according to bar code features. When the system is executed, main shaft angle synchronous interpolation is adopted, high-precision matching of a needle trace and a track is achieved, feedforward speed reduction and presser foot compensation are triggered when the system enters a seam forbidding area, and the instantaneous puncture load is reduced. The method effectively avoids the interference of a bar code area and improves the overall sewing quality.

Implementations of a needle loader and related methods are provided. The needle loader comprises a housing, a movable arm disposed within the housing, and a needle mount defined on the movable arm to releasably attach to an arced suturing needle. The needle loader further includes an arced needle releasably attached to the needle mount. The needle can be held in place on the needle mount by way of an interference fit. The needle mount can be defined on a surface of the movable arm that faces an arced needle track of a suturing device when loading an arced suturing needle in the needle track of the suturing device.

Devices and methods for minimally invasive suturing are disclosed. An illustrative device includes a housing defining an arced needle track therein having a first end and a second end separated by a gap defined in the housing to receive tissue to be sutured. The arced needle track is configured to receive an arced needle therein. The housing further defines an arced guide track therein to receive a guide. The device further includes a guide slidably disposed in the arced guide track displaceable between a first position along the guide track and a second position along the guide track. The guide includes a pawl to releasably engage the arced needle. The device further includes a filament operably coupled to the guide. The filament traverses a pathway from a proximal end of the housing toward a distal end of the housing.

The invention belongs to the technical field of biopsy puncture, and discloses a novel biopsy puncture needle passage plugging device which comprises a plugging sleeve and a positioning piece, the plugging sleeve is movably sleeved with the positioning piece, a puncture sampling needle is movably arranged in the plugging sleeve in a penetrating mode, and the top of the positioning piece is connected with a telescopic assembly. The upper end of the telescopic assembly is fixedly connected to the upper end of the plugging sleeve, the top of the plugging sleeve is fixedly connected with a regulation and control mechanism, and the regulation and control mechanism communicates with the plugging sleeve. Under the cooperation of the regulation and control mechanism and the like, the plugging pipe and the plugging plug can move relatively at the same time, so that the plugging plug slowly moves downwards relative to the plugging pipe while the whole plugging sleeve is conveniently and stably taken out, the effect of putting gelatin sponge while the puncture plugging equipment is taken out is achieved, the operation difficulty is reduced, the operation efficiency is improved, and the operation cost is reduced. In addition, the gelatin sponge can be promoted to be well put into a puncture needle passage, and the situation that bleeding spots cannot be completely covered due to local accumulation is avoided.

This invention provides a knitting mechanism, a knitting machine, and a knitting method. The knitting mechanism includes knitting needles, a cam assembly, and a needle selection assembly. The knitting needles include a hook needle and a connecting needle. The hook needle has a hook needle body and hook needle feet connected to the hook needle body. The connecting needle has a connecting needle body and connecting needle feet connected to the connecting needle body. The top of the connecting needle can be connected to the hook needle. The cam assembly has a connecting needle track, a first hook needle track, and a second hook needle track. By controlling the knitting needle to move along any one of the three tracks—the connecting needle track, the first hook needle track, and the second hook needle track—various pile lengths of pile, including no pile, short pile, medium pile, and long pile, can be achieved. This allows the cut loop pile fabric to present more three-dimensional patterns, increasing the variety of patterns available for cut loop pile fabric and meeting consumer demand.