760 results about "Needle puncture" patented technology

The invention discloses an accurate acupuncture positioning method under ultrasonic guidance, which relates to the technical field of medical health and comprises the following steps: acquiring a two-dimensional or three-dimensional ultrasonic image of a target area by utilizing ultrasonic image acquisition equipment; the Young modulus of the target area is calculated by measuring the shear wave propagation speed of the tissue of the target area; a sensor module is adopted to monitor the interaction force between the puncture needle and the tissue in real time, and mechanical data are obtained; according to Young modulus and modulus variance obtained through calculation of the shear wave elastography image and mechanical data fed back by a sensor, a time sequence feature vector is constructed; performing dynamic modeling and prediction on the tissue state in the puncture process by using a long-short-term memory neural network; the path offset of the needle head is judged, a correction signal is generated through a PID controller, and the posture or direction of the needle head is adjusted in real time; the problem of artifacts in a traditional ultrasonic image can be solved, more accurate acupuncture path planning is provided, and the method adapts to the change of tissue elasticity in real time.

The invention relates to the technical field of pen-type injection devices, in particular to a self-driven automatic injection device which comprises a shell, a medicine bottle support, a driving device and a control device. A needle puncture-proof protection assembly is arranged on the lower portion in the shell, the needle puncture-proof protection assembly comprises a needle hiding sleeve, and the needle puncture-proof protection assembly is configured in the mode that in the injection process or after injection is completed and the needle hiding sleeve is pulled out, the needle hiding sleeve can be locked, and then injection cannot be continued; an energy storage locking assembly is arranged on the upper portion of the interior of the shell and is configured in the mode that before injection, the driving rod is locked by the needle hiding sleeve, when one end of the needle hiding sleeve is stressed to move towards the driving rod, the driving rod is unlocked, the torsional spring provides driving force to enable the driving rod to drive the push rod to move towards the medicine bottle, and injection is achieved. Stable and reliable injection power can be provided, and injection can be rapidly achieved; in addition, the needle hiding sleeve can be locked no matter the needle hiding sleeve is pulled out during injection or after injection is completed, so that the needle hiding sleeve does not retract inwards, secondary injection is prevented, and safety and reliability are achieved.

The invention discloses an auxiliary device for preventing an injector from needling. The auxiliary device aims to solve the problems that an existing passive protection device is prone to being started by mistake, a push rod is prone to inclining, protection is not achieved after injection, and adaptability is poor. The device comprises an outer shell, a compression spring, an inner shell, a disposable prefilled syringe and a push rod. The shell is an external support and is provided with a guide bone position, an elastic step, a guide channel, an elastic buckle and the like; the inner shell is assembled in the outer shell, bears the injector and is connected with the compression spring; the push rod is in threaded connection with the syringe piston, and the actuating rod is inserted into the shell guide channel. The device realizes single-hand operation and automatic protection, does not need an additional activation step, is adaptive to a medicine production process, effectively reduces the risk of pricking injury, and avoids waste of liquid medicine. And the clinical use safety and the operation convenience are improved.

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.

The invention relates to the technical field of intelligent recognition, and discloses an acupoint acupuncture guidance method and system based on a knowledge graph, and the method comprises the steps: obtaining a real-time three-dimensional coordinate of a target acupoint on a target object through employing a multi-mode positioning technology; the physical sign data and disease information of the target object are obtained, an improved random forest algorithm is used for correcting standard parameters in the acupoint knowledge graph, an acupuncture scheme is generated, the acupuncture device is controlled to select a target needling instrument from the storage bin based on the acupuncture scheme, and acupuncture operation is executed; monitoring needle tip pressure, needle inserting depth and angle deviation in real time; when parameter deviation or abnormal biological signals existing in the needle point pressure, the needle inserting depth and the angle deviation are detected, the actuating mechanism is guided and driven to conduct self-adaptive adjustment till the needling operation is completed. Through the implementation of the invention, the problem that the related technology cannot meet the requirements of modern acupuncture treatment with precision, standardization and safety is solved.

The application provides a prostate precise puncture system, comprising: an image acquisition module configured to acquire anus image data of a patient; an anus detection module configured to receive the anus image data to detect the anus position of the patient in real time based on the anus image data; the posture adjustment module is configured to control the mechanical arm to perform posture adjustment, so that the mechanical arm pushes the ultrasonic probe to pass through the anus position to obtain prostate ultrasonic image data; and the needle insertion correction module is configured to obtain a needle insertion puncture position based on the needle insertion parameters and transmit the needle insertion puncture position to the posture adjustment module, so that the posture adjustment module performs needle insertion puncture on the focus planning point of the prostate based on the needle insertion puncture position and the prostate ultrasonic image data. The difficulty of manually placing the probe and the posture of the mechanical arm in the prostate puncture operation is improved, the needle inserting position is corrected, the sampling precision is improved, anatomical structures such as the urethra and the pubis are avoided, and the occurrence rate of puncture related complications and the puncture failure rate are reduced.

The invention relates to an injection device, which belongs to the technical field of medical equipment and comprises a shell, an activation button is arranged on the upper surface of the shell, an adhesive tape liner is arranged on the lower surface of the shell, a needle puncture structure and a medicine infusion structure are arranged in the shell, and the adhesive tape liner is used for adhering the injection device to the body of a user. The activation button is used for driving the needle puncture structure to puncture the injection needle into the skin for subcutaneous infusion, the medicine infusion structure is used for storing medicine and driving the medicine to enter the injection needle, and the technical problems that in the prior art, the movement freedom degree of a patient is limited, the nursing workload of medical staff is increased, and the puncture risk exists can be solved.

The invention discloses a prostate ablation operation needle insertion position construction method and a navigation system, and the method employs a three-dimensional model constructed by an MRI image, and determines the position of a needle insertion point and the number of inserted needles according to the ratio of the longitudinal axis distance between cystamen and verufugu to the diameter of a cylinder of single ablation needle ablation. If the upper and lower diameters of the prostate lateral lobes of the horizontal section corresponding to a single needle insertion point are smaller than 4cm, one needle is inserted into the horizontal plane; if the upper diameter and the lower diameter are greater than or equal to 4cm, entering two stitches; if the maximum diameter of the prostate lateral lobe at a certain longitudinal axis position in the horizontal direction is larger than 1 cm, a needle inserting point is additionally added, and if the length of the part protruding to the middle lobe of the bladder is larger than 1 cm, the needle inserting point is additionally added. The needle inserting point is utilized to enter a surgical navigation system, and the operation is accurately carried out in a unified mode under the guidance of the navigation system. A good treatment effect can be achieved when the hot steam ablation needle is punctured into a hyperplastic prostate near the urethra through the needle insertion point for ablation, the needle insertion point is constructed on the coronal section to ensure the ablation range, and the surgical risk is reduced.

The present disclosure provides an interventional needle fixing device for tumor clinical treatment, including an interventional needle adjustment mechanism. The interventional needle adjustment mechanism includes a roll adjustment assembly, a pitch adjustment assembly, a rotating assembly and a needle tube assembly. In the present disclosure, by arranging the interventional needle adjustment mechanism, when facing tumor lesions in different positions, doctors make the needle tube assembly realize left or right roll adjustment in a horizontal direction through the roll adjustment assembly, thereby accurately aligning a target area. At the same time, the pitch adjustment assembly can control the needle tube assembly to pitch upward or downward in a vertical direction, thereby meeting the diversified requirements of interventional needle angles in various complex surgical scenes, and improving the flexibility and accuracy of interventional needle puncture.

The present invention provides a method of assembling and packaging a medical needle device having a double ended needle (116), which comprises a container (170) having a closed end and an open end to receive a spring activated safety needle device (110) to provide passive needlestick protection to a non-patient end (118) of the needle (116). The method comprises performing the independent steps of (i) assembling a first sub-assembly (101) by mounting a shield (114) to a tubular housing (130) to form a telescopic device (104) and engaging the telescopic device (104) within the container (170), and (ii) assembling a second sub-assembly (102) by securing the double ended needle (116) within the needle mount (140), wherein the mounting element is provided on an external surface of the needle mount (140). The tubular housing (130) comprises (a) a mounting member on an internal surface to engage a mounting element of the needle mount (140), and (b) a spring to urge movement of the double ended needle (116) during use to a shielding position whereat the needle (116) extends at an angle oblique to a longitudinal axis of the tubular housing (130) to place the non-patient end (118) of the needle (116) at a location adjacent to an interior wall of the tubular housing (130). The method further comprises inserting the second sub-assembly (102) into the tubular housing (130) to secure the mounting element of the needle mount (140) to the mounting member of the tubular housing (130) to unite the second sub-assembly (102) to the first sub-assembly (101) to enable the spring to urge movement of the double ended needle (116) during use to a shielding position. Finally, the method comprises applying the closure a label (124) over the open end of the container (170) to seal the medical needle device 110 within the container (170).

The invention provides an automatic injection device which comprises a needle bin system, a needle head system, a needle head system, a needle head system, a needle head system, a needle head system and a needle head system, the driving system is detachably connected with the needle bin system, the driving system is provided with a first-stage driving mechanism and a second-stage driving mechanism, the first-stage driving mechanism is used for driving an injection needle of the pre-filling injector to pierce an injection part, and the second-stage driving mechanism is used for driving an injection push rod of the pre-filling injector to move; and the liquid medicine is injected into the injection part through the injection needle. The automatic injection device can be repeatedly used, more importantly, the automatic injection device is further provided with the first-stage driving mechanism and the second-stage driving mechanism, the first-stage driving mechanism is used for puncturing the injection needle on the pre-filling injector into the body by a certain depth, and then the second-stage driving mechanism drives the injection push rod of the pre-filling injector to move; all the liquid medicine is injected into the injection part, time sequence control is achieved, and therefore the liquid medicine injection effect can be ensured.

The utility model provides an endoscope clamping type arc-shaped needle puncture device, which is characterized in that a clamping control piece controls a matching space of a locking piece to be tightened, so that the locking piece is fixedly connected with an arc-shaped suture needle; the rotating control piece controls the connecting piece to rotate relative to the mounting frame from the initial position, and the connecting piece drives the arc-shaped suture needle to rotate relative to the shell so that the arc-shaped suture needle can penetrate through the mucosal tissue of the human body. After the connecting piece moves to the final position, reverse operation is carried out to enable the connecting piece to return to the initial position, and the operation is repeated for multiple times so that the arc-shaped suture needle can repeatedly rotate by 360 degrees to suture the mucosal tissue of the human body; due to the fact that the locking piece can be fixed to any position of the arc-shaped suture needle, the arc-shaped suture needle can be driven to rotate by any angle, the precision requirement for matching between the locking piece and the arc-shaped suture needle is lowered, and when the arc-shaped suture needle punctures a hard human mucosa tissue and is blocked or the rotating stroke is not enough, the arc-shaped suture needle can be driven to rotate by any angle. The locking piece can timely adjust the fixed position point so as to provide enough puncture force and rotation stroke for the arc-shaped suture needle.

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 invention provides a radiation shielding assembly, a drug vial assembly system, a method of dispensing a drug vial assembly system, and a radiopharmaceutical infusion device. The radiation shielding assembly is used for shielding a medicine bottle assembly containing radiopharmaceuticals, and the medicine bottle assembly is provided with a puncture communication piece capable of transversely moving. The shielding body is provided with a top opening, a small bottle containing cavity and a combination port, and the medicine bottle assembly is contained in the containing cavity through the top opening. The containing cavity is provided with a circumferential matching wall, the distance between the matching wall and the vertical center line is gradually decreased from the starting end to the tail end, and a moving path is provided for assembly. The medicine bottle is guided to move along the wall, and the bottom puncture communicating piece is guided to transversely move inwards and is in butt joint with the combination port when reaching the assembly completion position. After assembly is completed, the puncture communicating piece is in butt joint with the combination port. According to the invention, only one needle puncturing the top of the medicine bottle is used as an inflow channel. Needle adjustment is not needed when medicine is nearly empty, operation is simplified, and the error rate is reduced.

A right-angle needle-punching mechanism and a needle-punching device are provided. The right-angle needle-punching mechanism includes a first right-angle needle-punching assembly and a second right-angle needle-punching assembly, a position adjusting assembly configured to drive the first right-angle needle-punching assembly and the second right-angle needle-punching assembly approach or move away from the preform, and an angle adjustment assembly configured to change needle-punching angles of the first right-angle needle-punching assembly and the second right-angle needle-punching assembly. The angle adjustment assembly, the first right-angle needle-punching assembly, and the second right-angle needle-punching assembly are arranged on the position adjusting assembly. The first right-angle needle-punching assembly includes a first right-angle needle plate, the second right-angle needle-punching assembly includes a second right-angle needle plate, and the first right-angle needle plate and the second right-angle needle plate perform needle punching on respective sides of the right-angle part of the preform.

This article is a biological tissue sampling instrument attached to a mammography machine equipped with an X-ray irradiation unit and an examination table. The biological tissue sampling instrument has a needle holder that holds a needle for puncturing the breast and collecting biological tissue inside the breast. As shown in [Reference Diagram Showing the Installation State of This Article], the needle in the needle holder of this article is fixed in a horizontal position where the axial direction of the needle is parallel to the top surface of the examination table. As shown in [Perspective View 2], the slide holding part holds the needle holder and can slide it with respect to the slide axis. By this sliding, the needle can be punctured into the breast placed on the examination table from the lateral direction. Also, as shown in [Perspective View 2] and [Perspective View 3], the needle holder can be attached by rotating it in the horizontal plane with respect to the needle holder attachment part. Thereby, the direction of the needle can be changed. Further, the biological tissue sampling instrument has a slider base attached and fixed to the mammography machine. As shown in [Perspective View 3] and [Perspective View 4], the arm, the slide axis, and the slide holding part can be attached by rotating 180° with respect to the slider base. The needle holder attachment part can be replaced on the lower side of the slide holding part rotated 180°. Thereby, the left-right position of this article with respect to the examination table can be changed. In addition, in order to grasp the position of the needle, graduations may be provided on the scale part integrally formed with the slide axis. As shown in [Reference Perspective View Showing the Slide Axis and the Slide Holding Part], a guideline for grasping the position of the slide holding part with respect to the scale part is provided on the slide holding part.

The invention relates to the field of medical instruments, and provides an injection needle device applied to an application pump and an infusion device. The injection needle device comprises a bottom plate with a limiting ring; the needle injection device comprises symmetrical clamping arms to form a slideway, and arm bottom clamping hooks are clamped with a limiting ring; the injection needle key in the slideway is fixedly connected with a hard needle; the infusion base at the bottom of the key is connected with the soft needle; the hard needle penetrates through the soft needle; buckling arms are arranged on the inner sides of the clamping arms, and the surrounding inner diameter is smaller than the outer diameter of the key; when the key is pressed, the hard needle and the soft needle puncture the skin, and the key extrudes the buckle arm to expand outwards to enable the hook to be separated from the limiting ring, so that the needle injector is automatically separated from the bottom plate. The infusion device comprises the bottom plate and an infusion base, the pump body is buckled with the bottom plate, the liquid storage tank is fixedly connected with the pump body, and an infusion tube of the liquid storage tank penetrates through the infusion base to be communicated with the soft needle. The technical problems of split assembly, secondary unlocking, step-by-step puncture and pipeline deviation of the application pump in the prior art are solved, and the effects of preassembling integration, automatic separation, synchronous puncture and leakage and vibration prevention are achieved.

The invention discloses a positive current collector with high safety performance and a preparation method thereof, the positive current collector comprises an aluminum foil base material and a safety coating coated on at least one surface of the aluminum foil base material, and the safety coating comprises lithium-containing phosphate, oxide solid electrolyte, a conductive agent and a binder in a weight part ratio of (50-95): (1-20): (1-10): (1-5). According to the positive current collector disclosed by the invention, the surface of the aluminum foil base material is coated with the safety coating containing lithium phosphate as a main component, and the coating has excellent thermal stability and mechanical strength, so that the formation of an aluminum wedge under a needling condition can be effectively inhibited, the probability of short circuit between the positive current collector and a negative electrode is reduced, and the needling safety performance of the battery is remarkably improved. Meanwhile, the oxide solid electrolyte added in the safety coating increases a lithium ion transmission channel, improves the ion diffusion rate, and further enhances the safety performance and electrochemical performance of the positive electrode current collector.

The utility model discloses a spindle box type needling machine with needles convenient to replace, and relates to the technical field of needling machines. The spindle box type needling machine facilitating needle replacement comprises a supporting frame, an assembling plate is arranged in the supporting frame, a mounting groove is formed in the lower surface of the assembling plate, a mounting plate is fixedly connected to the top wall of the mounting groove, a mounting block is fixedly connected to the lower surface of the mounting plate, and sliding grooves are formed in the surfaces of the left side and the right side of the mounting block correspondingly; the interiors of the two sliding grooves are slidably connected with clamping blocks correspondingly, the inner walls of the left side and the right side of the supporting frame are rotationally connected with threaded rods correspondingly, the two threaded rods are arranged in a mirror image mode, and the close ends of the two threaded rods rotationally penetrate into mounting blocks correspondingly, so that when pricking needles are replaced on a large scale, the needle plate can be taken down conveniently, and the pricking needles can be replaced conveniently. And therefore, the pricking needle can be conveniently detached in a special environment, and the problems that workers are injured and the replacement progress is slow due to the fact that the detaching space is narrow and repeated for multiple times are solved.

The invention provides a single-needle hemodialysis blood pipeline device which comprises a piston type container, a liftable piston plate is connected to the interior of the piston type container through a first elastic piece, an artery pot and a vein pot are arranged on one side of the piston type container and communicate with each other through a three-way pipeline, one end of the first pipeline communicates with the artery pot through a first valve, and the other end of the first pipeline communicates with the vein pot through a second valve. The blood pump is communicated with a dialyzer, one end of the dialyzer is communicated with a pipeline II, and the pipeline II is communicated with the vein pot through a valve II; the pipeline III is communicated with the pipeline I and the piston type container and is provided with a valve III; the fourth pipeline is communicated with the second pipeline and the piston type container and provided with a fourth valve, and the piston type container is further provided with a switching mechanism. According to the device, blood can be fully dialyzed only through single-needle puncture, it is ensured that the blood in the dialyzer makes full contact with the dialyzer, the toxin removing efficiency is improved, and finally full dialysis in a special scene is achieved.

The invention relates to the technical field of robots, and discloses an acupuncture robot which comprises a needle cylinder, a needle box, an electromagnet, a first cylinder, a first annular plate, a clamping block, a hollow spline shaft, a spline sleeve and a connecting rod. During use, the electromagnets are controlled to be powered on, magnetic force can be generated, and acupuncture needles placed in the first circular grooves are attracted. Then any electromagnet is controlled to be powered off, and the acupuncture needle opposite to the electromagnet can fall into the needle cylinder under the action of gravity. And then the needle cylinder falls out from the small-opening end of the needle cylinder along the inner wall of the needle cylinder and is clamped by the clamping blocks. At the moment, the needle cylinder is controlled to move, and the clamped acupuncture needle can be punctured into the body of the patient. After the acupuncture needle is punctured and the punctured acupuncture needle is loosened, the other electromagnet is controlled to be powered off, the operation can be repeated, the other acupuncture needle is automatically discharged and clamped, the needle replacement time is shortened, and the acupuncture speed is increased.

The invention provides a conveying device and application, the conveying device comprises a first flexible belt which is driven to keep circulating motion, a needle roller is arranged above the conveying surface of the first flexible belt, and a soft object conveyed between the needle roller and the first flexible belt is punctured by the needle roller to form a hole penetrating into the soft object. The conveying device is applied to meat product pickling, processing and conveying, the needle rollers conduct needling treatment on conveyed meat to form needle holes penetrating into the meat, and pickling material permeation is promoted.

The present application relates to the technical field of electrolysis therapeutic instrument, and proposes a kind of free puncture hemorrhoid electrolysis therapeutic instrument, including power supply, for providing conversion electric energy to the therapeutic instrument;Control handle, electrically connected with power supply, and the end is equipped with control display system, for grasping and controlling the size of current output;Therapeutic soft pad: electrically connected with power supply, and its upper surface is covered with medical gauze, and is placed in the lower surface of the thigh of the load end of patient, and the thigh skin is fully contacted with the medical gauze added with physiological saline, to form current loop;Free puncture detection expansion probe mechanism, installed on control handle, for tissue examination of anal part and free puncture contact hemorrhoid part, output micro-current.The beneficial effects of the present application are: no need for acupuncture treatment, can reduce the pain and bleeding of patient during treatment, improve the safety of treatment, and use conveniently, treatment is fast.

The invention relates to the technical field related to medical instruments, and discloses a self-adaptive device capable of automatically enhancing and maintaining the needling feeling of a needling remaining needle, which comprises a needling execution device used for intervening an acupuncture needle which is punctured into the skin and generates the needling feeling; the acupuncture control system is used for recording parameter changes in the needle feeling maintaining process; the installation mechanisms are installed on the two sides of the needling execution device and comprise hook columns and fixing mechanisms, and the needling execution device can be fixed through cooperation of the hook columns and the fixing mechanisms. According to the self-adaptive device capable of automatically enhancing and maintaining the needle feeling of the acupuncture needle, axial pressure and transverse thrust are applied to the acupuncture needle which is punctured into the skin by using a preset control model through an accurate and controllable hydraulic mechanical system, so that the needle feeling is effectively enhanced and maintained for a long time; the device is far away from an electronic and electrical control system, electromagnetic interference possibly brought by electronic equipment can be effectively avoided, and the applicability and safety of the device are greatly improved.

The invention relates to a reagent container for nucleic acid extraction and nucleic acid amplification, which comprises a box body and a box cover, and the box body is provided with a sample cavity and a reagent cavity; the kit cover comprises an upper cover and a lower cover, a reagent through hole communicated with the reagent cavity and a sample injection hole communicated with the reagent cavity are formed in a base plate of the lower cover, and the reagent through hole and the sample injection hole are sealed by sealing films; an upper disc of the upper cover is provided with a sample inlet hole and a sealing hole; a puncture needle is arranged at the bottom of the upper disc; when the upper cover is located at the first screwing position, a gap is formed between the puncture needle and the sealing film; when the upper cover is located at the second screwing position, the sample injection hole is opposite to the sample injection hole, and the puncture needle punctures the sealing film located at the reagent through hole; when the upper cover is located at the third screwing position or returns to the first screwing position, the sealing hole is opposite to the sample injection hole, and the sample injection hole is blocked through the sealing plug. The technical problems that a box cover for nucleic acid extraction and nucleic acid amplification is inconvenient to open and close, and the box cover is not tightly closed and easily leaks are solved.

The utility model discloses an analyte detection system, which comprises a mounting unit and an analyte detection device, an elastic pad is sleeved on an auxiliary needle at the contact position of the auxiliary needle and the analyte detection device, and when the auxiliary needle retracts, the elastic pad can press the wound caused by the auxiliary needle puncturing into the subcutaneous part. Blood is prevented from permeating into the analyte detection device and polluting the analyte detection device, so that the normal use of the analyte detection device is ensured.

The invention provides a kind of gel material, including the following components: agar, carrageenan, konjac gum, additives; The mass ratio of described agar, carrageenan, konjac gum is 18-22:1-5:1-5; The described additives include potassium dihydrogen phosphate, potassium sorbate, food coloring. The venipuncture model of the present invention is a highly simulated human blood vessel model, which can simulate real human blood vessel structure, so that learners can perform practical operation in a simulated environment, improve learning effect, adopt agar as main material, simple to make, with low cost, convenient for large-scale production and promotion, single model single point can actually enter needle puncture and reach more than 70 times, improve mold service life, and reduce cost.

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 invention discloses radiopharmaceutical split charging equipment and a split charging method. The equipment comprises an upper shell and a lower shell, a base used for containing a stock solution bottle distribution tank is arranged at the bottom of the lower shell, a cover opening mechanism used for opening a tank cover of the stock solution bottle distribution tank and a needling mechanism used for extracting stock solution in a stock solution bottle are arranged above the base, and a horizontal sliding mechanism is arranged at the bottom of the base. The driving mechanism is used for driving the base to slide to the position under the uncovering mechanism and the needling mechanism. A stock solution extracting needle is fixed to the needling mechanism and used for extracting stock solution in a stock solution bottle and then transferring the stock solution into a liquid medicine diluting bottle in the upper shell, and then split charging is achieved through a liquid medicine split charging and transferring guide pipe in the upper shell. Opening of a stock solution bottle distribution tank and extraction of stock solution in a stock solution bottle can be sequentially achieved in the lower shell through the uncovering mechanism and the needling mechanism, the stock solution distribution tank and the stock solution in the stock solution bottle can be matched with a liquid medicine subpackaging and transferring guide pipe in the upper shell, all-directional protection subpackaging is achieved, the protection effect in the whole process is good, and harm to medical staff is greatly reduced.