420 results about "Needle insertion" patented technology

The invention discloses a buccal needle positioning navigation method and system based on multi-mode perception driving, and the method comprises the steps: collecting the image information and depth information of the face of a patient; generating an individualized face three-dimensional model according to the image information and the depth information; determining a standard meridian map according to a meridian database, and registering the standard meridian map to the individualized face three-dimensional model through non-rigid deformation to obtain acupuncture point positioning; according to the acupuncture point positioning and a pre-stored organization hierarchy model, needle insertion path guiding information is calculated and generated, and in an interactive interface, the acupuncture point positioning and the needle insertion path guiding information are displayed in an overlapped mode so as to execute the needle insertion guiding process; and in the needle insertion guiding process, collision detection is carried out according to the needle insertion path guiding information and the organization level model, and safety early warning is carried out when a collision risk is detected. The precision and safety of the acupuncture treatment process can be effectively improved.

The utility model relates to the technical field of pasture processing equipment, in particular to a square bale collecting machine. Comprising a dip angle pickup device, a horizontal transmission device, a straw bale leading-in device, a straw bale jacking device, a needle threading device assembly, a knotter assembly, a straw bale leading-out device and a bale collecting bin which are installed on a chassis assembly. The dip angle pickup device picks up small square bales on the ground and sends the small square bales to the horizontal transmission device, the horizontal transmission device sends the small square bales to an inlet of the bale collecting bin, the bale guiding device pushes the small square bales into the bale collecting bin, and the bale jacking device jacks the small square bales to the upper portion of the bale collecting bin. When the number of the small square bales in the bale collecting bin reaches a set value, the needle threading device assembly and the knotter assembly work at the same time to bundle the small square bales into a large square bale, the bale guiding device pushes the large square bale out of the bale collecting bin, and the large square bale falls on the ground. Small square bales can be picked up, stacked, extruded and bundled into large square bales, the operation efficiency is improved, and the cost is greatly reduced.

The embodiment of the invention provides a detachable detection device and a needle assistor, the detection device is used for detecting blood glucose, the detection device comprises a detection assembly, a sensor assembly and a needling assembly, the detection assembly comprises a flat shell, the outer wall of the bottom of the flat shell is sunken inwards to form a containing cavity, the sensor assembly comprises a base and a probe, the base is provided with a second via hole, and the probe is arranged in the containing cavity. The base is detachably clamped in the containing cavity, part of the probe is located in the base, part of the probe extends out of the hole wall of the second through hole and extends towards the side away from the detection assembly, and when the base is located in the containing cavity, the probe is electrically connected with the detection circuit board. According to the embodiment of the invention, the detection assembly and the sensor assembly are mutually detachable and can be clamped, so that only the sensor assembly is sterilized instead of the detection assembly in the sterilization process, and the influence on the detection circuit board in the detection assembly in the electromagnetic wave or irradiation sterilization process can be avoided; the product yield of the detection device is improved.

The provided is a minimally invasive puncture system based on a navigation system. The minimally invasive puncture system includes a puncture instrument and an electromagnetic navigation module. A first electromagnetic positioning sensor in the electromagnetic navigation module is fixedly provided on a puncture needle body portion of the puncture instrument, and a second electromagnetic positioning sensor is slidably sleeved on the puncture needle body portion. An electromagnetic positioning reading device in the electromagnetic navigation module is configured to acquire real-time coordinates of the first electromagnetic positioning sensor and the second electromagnetic positioning sensor, so as to obtain a real-time movement trajectory of the second electromagnetic positioning sensor relative to the first electromagnetic positioning sensor, thereby determining whether a real-time needle insertion trajectory of the puncture needle body portion entering the human body conforms to a system-default needle insertion trajectory.

A sewing machine external unit includes: a holder holding fabric; a driver being detachable from a bed of a sewing machine and driving the holder along an upper surface of the bed; a pressing member moving in an up-down direction according to movement of a sewing needle in the up-down direction, pressing the fabric while the sewing needle is stuck in the fabric, and rising together with the sewing needle in response to the sewing needle coming out of the fabric and rising; a position detector detecting a position of the pressing member in the up-down direction; a signal output part outputting a signal to the sewing machine; and a controller outputting a needle drive signal for driving the sewing needle from the signal output part to the sewing machine, and controlling driving of the holder and / or the sewing needle based on a detection result of the position detector.

The invention belongs to the field of medical instruments, and relates to an intracranial hematoma minimally invasive three-dimensional guider. The guider comprises a bed body, a headrest module, an auxiliary positioning module and a puncture module, and accurate positioning of a puncture needle is achieved through the surrounding type design with the head as the sphere center in combination with a rotatable semi-arc guide frame and a sliding guide block. The device has supine and prostrate dual-mode supporting and fixing functions, integrates intelligent pressure control and real-time needle insertion depth monitoring, and improves the surgical accuracy, stability and safety.

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.

An infusion system comprising: a device for delivering fluid to a tissue of the user; a hub engaging the device for delivering fluid, the hub including an introducer needle for introducing an infusion catheter or an analyte sensor into the tissue of the user, the hub configured to be removable by the user; and an activation mechanism for moving the hub toward the user to thereby cause the introducer needle to be inserted into the tissue of the user.

The utility model relates to the technical field of blood taking needles, and discloses a blood taking needle protection device which comprises a blood taking needle, the blood taking needle is connected with a blood taking device through a hose, the right side of the blood taking needle is fixedly connected with a push piece, the upper side and the lower side of the push piece are both provided with holes, a hollow pipe is arranged on the outer side of the blood taking needle, and the hollow pipe is connected with the blood taking device. An opening is formed in the right side of the hollow pipe, the right side of the push piece penetrates through the opening, fixing columns are fixedly connected to the upper end and the lower end of the right side of the hollow pipe, connecting ropes are fixedly connected to the right ends of the fixing columns, and blocking blocks are fixedly connected to the right ends of the connecting ropes. According to the blood taking device, the sliding blocks are in sliding connection with the corresponding sliding grooves and matched with the pushing pieces to penetrate through the openings to slide, so that the pushing pieces drive the blood taking needles to be inserted into subcutaneous tissue for blood taking, the blocking blocks are matched with the corresponding holes to be clamped, the blood taking needles are protected by the hollow pipe after blood taking, infection caused by pricking of the blood taking needles is avoided, and later classification treatment is facilitated.

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.

An autoinjector comprising a housing and a syringe assembly that carries a needle. A drive spring 8 is configured to urge a driver 10 to rotate, which controls delivery of a drug. Biasing means are

The invention discloses a lotus root cover grabbing and transferring device based on the gravity effect. The lotus root cover grabbing and transferring device comprises a clamping type winding rotating mechanism, a gravity grabbing mechanism, a steel needle, a needle withdrawing stripping piece and a linear module. According to the device, a servo motor drives a winding mechanism to enable a gravity type gripper to freely fall before cutting, and a steel needle is inserted into a lotus root cover to be fixed; after cutting is completed, the motor rotates reversely to drive the gripper and the lotus root caps to ascend and horizontally move to the position above the collecting tray, and the lotus root caps are separated from the steel needles and fall into the tray through needle withdrawing stripping pieces. The lotus root cover grabbing and separating device utilizes gravity to realize rapid and reliable lotus root cover grabbing and separating, is simple in structure and stable in operation, effectively solves the problems that lotus roots are easy to incline and lotus root covers correspond to lotus root sections in original matching in the cutting process, and is suitable for a glutinous rice lotus root automatic production line.

The utility model discloses an anti-pine needle female seat which comprises a female seat shell, a female needle body is installed on the inner side of the female seat shell, the female needle body is made of high-strength metal materials, the female needle body comprises a female needle inserting end, a female needle connecting end and a fixing rod, and an inserting groove is formed in the top end of the female seat shell. The female needle inserting end is located on the inner side of the inserting groove and used for being matched with a male seat pin, and a hexagonal limiting block is arranged on the surface of the end, close to the female needle inserting end, of the female needle body; through the matching arrangement of the convex ring and the elastic clamping block, the radial limiting of the female pin main body is realized, the loosening of the female pin in the radial direction is effectively prevented, the electrical connection stability of the connector is improved, and through the arrangement of the anti-loosening rubber layer between the female seat shell and the female pin main body, the bonding force between the female pin and the female seat shell is enhanced, and the electrical connection stability of the connector is improved. The female pin is prevented from loosening in the axial direction, and the anti-loosening effect is further improved.

The felting needle of the invention has a shank attached to a rear end of the needle in its longitudinal direction. The felting needle has a working section attached to a front end. The shank has a clamping section and a guide section. The guide section is positioned further forward in the longitudinal direction than the clamping section. The diameter of the guide section, measured perpendicular to the longitudinal direction, is smaller than the diameter of the clamping section, also measured perpendicular to the longitudinal direction. The felting needle of the invention is characterized in that the diameter of the guide section is at most 12%, preferably at most 9%, and even better at most 6% smaller than the clamping diameter. This allows the felting needle to be inserted more easily into the needle board and protects the board during insertion.

The present application relates to a kind of portable acupuncture positioning and needle insertion auxiliary, belong to medical instrument technical field.The device includes protective box, the center position of the inside of protective box is provided with needle insertion assembly, the needle insertion assembly includes storage box, first hydraulic telescopic device, screw rod, moving frame, servo motor, magnetic rheological damper, support spring, fixed frame, second hydraulic telescopic device and rubber clamping plate, and storage box can be extended to the outside of protective box by protective box lower end opening, the front end of the protective box is provided with execution component, the execution component includes control panel, infrared distance sensor, power supply module, first angular velocity sensor, second angular velocity sensor, laser emitter and angle sensor, the rear end of the inside of storage box is fixedly provided with power supply module, and power supply module is electrically connected with control panel, the present apparatus can promote acupuncture needle to move by first hydraulic telescopic device and screw rod, to improve the accuracy of needle body penetration.

This skin aesthetic device allows for precise adjustment of the degree to which multiple needles are inserted, ensuring sufficient skin aesthetic effects, and enables easy correction of errors in needle insertion during use. [Solution] The skin beauty device 100 has a transfer mechanism that screws onto the ball screw rotating shaft of a stepping motor (SM) and moves forward from the origin position, then moves backward to return to the origin position. The transfer mechanism moves forward by a distance corresponding to the forward signal of the SM, pushing the needle bundle, so that multiple needles fixed to the needle bundle are precisely inserted into the skin to an extent corresponding to the forward signal, and alternating current supplied via the transfer mechanism is passed through the multiple needles for a predetermined time inside the skin to promote skin regeneration by forming tiny wounds. When it senses that the transfer mechanism has moved backward by a distance corresponding to the backward signal of the SM and returned to the origin position, the transfer mechanism is moved forward again by a distance corresponding to the origin correction drive signal of the SM to correct the origin position.

The utility model discloses a pediatric surgery suture needle management auxiliary device which comprises a box body, a plurality of containing grooves are vertically formed in the top of the box body, a push-out assembly is arranged in each containing groove, a limiting assembly is arranged on a lifting body, and the pediatric surgery suture needle management auxiliary device is provided with a rectangular hole, a round rod, a rubber ball body and a needle inserting hole. When the operation suture needles in the needle inserting holes in the lifting body need to be taken, the rubber ball body is pushed to drive the round rod to move upwards, the round rod drives the lifting body to move upwards in the containing groove, at the moment, the operation suture needles inserted into the lifting body are in a row, and at the moment, the operation suture needles can be conveniently and rapidly taken out of the needle inserting holes; and the situation that the surgical suture needles are gathered together and cannot be quickly taken is prevented.

A catheter assembly includes: an inner needle configured to puncture a living body; a catheter configured to allow the inner needle to be inserted therethrough; a catheter hub located at a proximal end of the catheter; a valve body located in an internal space of the catheter hub; an opening member configured to be located in the catheter hub on a proximal side of the valve body, the opening member including: a cylindrical barrel portion, a neck portion extending from a distal end of the barrel portion, wherein a diameter of the neck portion is smaller than a diameter of the cylindrical barrel portion, and a foot portion extending proximally from the barrel portion. The opening member is configured to move in a distal direction through the internal space of the catheter hub to open the valve body by the neck portion.

The utility model relates to the technical field of acupuncture equipment, and provides an acupuncture needle with sticking and pricking performance, which comprises an acupuncture needle handle, an acupuncture needle body, a fixer, kinesio and isolation paper, the isolation paper is stuck below the kinesio, the kinesio and the kinesio are arranged on the kinesio in a penetrating manner, and the acupuncture needle handle is connected with the fixer. The filiform needle handle and the filiform needle body are integrally formed, the fixator is arranged at the combined part of the filiform needle handle and the filiform needle body, the size of the filiform needle body is 0.25 * 40mm, and the fixator is a soft fixing band piece with a changeable shape. After acupuncture acupoint selection and needle insertion of a fixed filiform needle body are performed, a fixator and isolation paper are removed, kinesio tape is downwards fixed to acupoint skin along the needle body, then the kinesio tape is properly pulled, and local tissue is fixed in an attached and pricked mode, so that the acupoint stimulation effect is achieved, the local tissue is fixed, and the acupoint stimulation effect is achieved. Lymphatic reflux is improved, so that swelling and pain are relieved, and the treatment effect is improved.

The invention discloses an auxiliary needle inserting device for traditional Chinese medicine acupuncture therapy, which comprises a box body, a sliding plate is arranged in the box body, a circular tube is rotatably connected to the top wall of the sliding plate in a penetrating manner, a first circular ring plate is fixedly connected to the circular tube, and a second circular ring plate is slidably connected to the first circular ring plate; a plurality of arc-shaped holes are evenly formed in the second circular ring plate, matching rods are fixedly connected to the sliding columns, the matching rods and the adjacent arc-shaped holes slide in a penetrating mode, a plurality of sliding grooves are evenly formed in the first circular ring plate, the sliding columns are slidably connected to the sliding grooves respectively, one end of each sliding column is fixedly connected with a clamping plate, and the other end of each sliding column is fixedly connected with the clamping plate. The multiple clamping plates jointly clamp and fix the side portion of an acupuncture needle, and a power mechanism enabling the acupuncture needle to be inserted and lifted on the skin surface of a patient is arranged in the box body. In the invention, the horizontal state of the box body is adjusted by moving the handle and observing the gradienter, so that an inserted needle is vertical to the skin of a patient during acupuncture operation, and the acupuncture effect is improved.

The utility model discloses a full-automatic needle supplying and inserting device in the technical field of needle inserting machines, which comprises a mounting seat, a straight vibration feeding machine is fixedly connected to the left side of the top of the mounting seat, a straight vibration feeding plate is fixedly connected to the top of the straight vibration feeding machine, a feeding device is fixedly connected to the top of the mounting seat, and the feeding device is fixedly connected to the right side of the top of the mounting seat. A framework positioning air cylinder is fixedly connected to the middle of the top of the feeding device, a framework positioning block is fixedly connected to the telescopic end of the framework positioning air cylinder, a vertical plate is fixedly connected to the right side of the top of the mounting base, a needle inserting air cylinder is fixedly connected to the upper side of the right side wall of the vertical plate, and a needle inserting plate is fixedly connected to the telescopic end of the needle inserting air cylinder. A sliding plate 140 is fixedly connected to the position, located on the left side of the vertical plate 130, of the top of the mounting base 100. The full-automatic needle supplying and inserting device is reasonable in structural design, the inserting quality can be improved, and the needle inserting efficiency can also be improved.

The utility model provides a winding device and relates to the technical field of battery cell manufacturing equipment. The winding device comprises a support, a winding mechanism, a first driving mechanism and a second driving mechanism. The winding mechanism comprises a support, a winding needle piece and a driving piece, the support is rotatably arranged on the support, the first driving mechanism drives the support to rotate, and therefore the winding needle piece arranged on the support can change the position, and the winding needle pieces located at different stations can conduct battery cell winding operation, tail glue pasting operation or battery cell discharging operation conveniently. Under the condition that the corresponding winding needle piece moves to the battery cell winding station, the driving piece drives the winding needle piece to rotate, so that the battery cell winding action is realized; the second driving mechanism drives the winding needle piece to move in the axial direction so that the winding needle piece can achieve needle inserting and needle pulling operation.

The invention discloses an amniotic fluid drainage device for an operating room. The amniotic fluid drainage device comprises a drainage box and a fixing cylinder. A drainage tube is arranged at the upper end of the drainage box and movably connected with the fixing cylinder; the interior of the fixing cylinder is hollow, the upper end is provided with a fixing ring, two sides are symmetrically provided with depth sliding grooves which are slidably connected with fixing rods, a plurality of fixing grooves are arranged along one side of each depth sliding groove in an array mode, the other side is provided with scales, and two sides of the bottom are symmetrically provided with fixing pieces. The middle of the fixing rod is provided with a limiting ring rotationally connected with the needle handle; the front end of the needle handle is provided with the needle body, and the rear end is provided with the hard tube slidably connected with the fixing ring. The hard tube penetrates through the fixed cylinder and is provided with a drainage tube which is movably connected with the drainage box; through sliding fit of the fixing rod and the depth sliding groove, the height of the fixing rod in the fixing cylinder can be visually adjusted along the scales, and precise control over the insertion depth of the puncture needle is achieved in combination with rotary connection of the limiting ring and the needle handle.

In one embodiment, a printing liquid supply device for supplying liquid to a liquid needle of a receiving station is provided, the printing liquid supply device comprising: a liquid container comprising an at least partially collapsible liquid reservoir; an interface structure at a side of the container, the interface structure comprising: a liquid channel comprising a reservoir connection portion fluidically connected to the reservoir and to a needle receiving portion to allow liquid flow from the reservoir to the needle; a liquid interface of the liquid channel adjacent to the needle receiving portion and at a distance from the reservoir connection portion; a front wall and / or an edge adjacent to the liquid interface comprising a push area arranged between the liquid interface and the container; at least one key pen base, and a key pen protruding from the base in a direction parallel to and opposite to the needle insertion direction; an array of contact pads next to the liquid channel needle receiving portion, in another example a sub-assembly of such a device is provided.

This utility model relates to the field of steam ablation technology, providing a prostate thermal steam ablation catheter and steam ablation handle. The catheter includes a guide rod and a catheter tip, with the catheter tip located at the end of the guide rod. The catheter tip has a needle insertion channel and a flushing channel. The catheter tip has a first notch, a second notch, and a third notch, which surround the needle insertion channel. The sidewall of the catheter tip also has a first shielding surface and a second shielding surface. The first shielding surface guides a portion of the fluid flowing out along the first notch to flow in the opposite direction, and the second shielding surface guides a portion of the fluid flowing out along the second notch to flow in the opposite direction. This structure guides the flow of sterile water to the steam ablation center corresponding to the puncture needle, ensuring that sterile water covers three sides of the steam ablation center, forming a vortex. This allows for heat dissipation and uniform cooling of the treatment area, helping to avoid the risk of steam burns to tissue and improving the clarity of observation of the treatment area.

The application discloses an automatic needle insertion method combining a blood flow optimization model with a neural network. The method first calculates the blood vessel position and blood flow velocity distribution of a needle insertion area according to blood flow information measured by automatic ultrasonic scanning by means of the Doppler ultrasonic principle, then establishes a blood flow relative velocity optimization model and a neural network with a selection function, and decides the optimal needle insertion point and needle insertion angle on the basis of physical measurement results, and finally simulates the needle insertion path by means of a neural network with a learning function according to the needle insertion method of a professional. The method can be used for needle insertion of subcutaneous blood vessels of limbs and other body parts, and overcomes the difficulty of manual needle insertion when the blood vessel is not visible to the naked eye, thereby providing technical assistance for self-rescue and first aid in an environment lacking professional personnel.

The utility model discloses a high sharpness injection needle, including needle tube and needle tip, the needle tip adopts three -stage tapering type multi -edge surface structure, and this three -stage tapering type multi -edge surface structure is composed of main cutting part, transition part and micro blade part, the main cutting part includes three symmetrical distribution's first inclined plane, and every first inclined plane bifurcates two second inclined planes to form transition part, and every second inclined plane bifurcates two third inclined planes to form micro blade part, the needle tip surface is equipped with a plurality of micro -groove, and the third inclined plane intersection of on micro blade part forms nanometer -class blade edge, and this blade edge edge is equipped with periodic micro sawtooth. The utility model discloses a needle tip is three -stage tapering type multi -edge surface structure, and the puncture resistance is reduced in stages, and the pain feeling is reduced, sets up micro sawtooth and can reduce the tissue contact area through " point cutting", and the local stress concentration when puncturing, and then delay passivation, sets up micro -groove and can guide the tissue fluid flow, destroys the negative pressure adsorption effect, and improves the needle insertion smoothness.

The technical scheme belongs to the technical field of template machines, and particularly relates to a needle rod device of a template machine, which comprises a rack, a needle rod, a needle head, a needle rod, a needle rod and a needle rod, the displacement mechanism is arranged on the machine frame, the displacement mechanism comprises a displacement driving part and a needle rod connector arranged at the output end of the displacement driving part, the front end of the needle rod connector is arranged outside the machine needle rod in a sleeving mode, and the displacement driving part drives the machine needle rod to move in a reciprocating mode in the needle inserting direction through the needle rod connector; the rotating mechanism is arranged on the machine frame, the rotating mechanism comprises a rotating driving part, the machine needle rod is arranged at the output end of the rotating driving part, and the rotating driving part is used for driving the machine needle rod to rotate with the axis of the machine needle rod as the center.

The application relates to the technical field of medical image processing, and discloses a needle insertion positioning device, a control method thereof and a storage medium. The needle insertion positioning device comprises an ablation needle, a magnetic calibration module and an auxiliary needle insertion module. The magnetic calibration module is used for acquiring a three-dimensional image model corresponding to a target object, searching for magnetic calibration position information and image calibration position information according to the three-dimensional image model, and constructing a conversion relationship from a magnetic positioning coordinate system to an image coordinate system of the three-dimensional image model according to the magnetic calibration position information and the image calibration position information. When the magnetic calibration module and the ablation needle are respectively detachably arranged in the auxiliary needle insertion module, the auxiliary needle insertion module acquires magnetic positioning information corresponding to the magnetic calibration module, converts the magnetic positioning information into needle insertion pose information of the ablation needle on the three-dimensional image model by using the conversion relationship, and displays the needle insertion pose information. The application realizes accurate positioning of needle insertion of the ablation needle and an action area of the ablation needle, so that the needle insertion direction and position of the ablation needle can be adjusted.

The invention relates to the field of neuroscience experiments and biomedical engineering, and discloses a brain stereotactic method and system based on a turtle skull zero point, and the method comprises the following steps: taking a repeatedly recognizable bony mark point of a turtle skull as a zero point; a plane parallel to the reference plane of the brain stereotaxic instrument is established as an XY plane, and an axis parallel to the zero point probe is taken as a Z axis. Further, the invention provides a coordinate conversion method for converting target point coordinates in a three-dimensional image into a coordinate system of a stereotaxic instrument, which comprises the following steps of: positioning a zero point and a reference point in the image, determining a Z-axis direction, constructing an orthogonal coordinate base, and calculating rigid body transformation from an image coordinate system to a stereotaxic coordinate system; therefore, the three-dimensional displacement, the needle inserting depth and the track parameters for the movement of the positioning arm are output. The device can be used in cooperation with an existing brain stereotaxic instrument suitable for turtles, high-repeatability positioning of turtle brain region electrode implantation / injection is achieved, and the consistency and efficiency of cross-individual and cross-batch experiments are improved.