250 results about "Radioactive particles" patented technology

A stent crimping apparatus for crimping a deformable radioactive stent onto a deployment device which includes a first jaw member defining a shielded first compression surface, and an opposed, second jaw member defining a shielded second compression surface oriented opposite the first compression surface. The first and second compression surfaces are adapted to collectively form an elongated guide bore formed for axial receipt of the deformable stent and the deployment device therein. To protect against exposure to the radioactive stent, a shield assembly is provided defining an opening into a bore therein which is formed and dimensioned for longitudinal receipt of the deformable stent in an uncrimped condition. A shield assembly defines an opening into the bore, and cooperates with the first and second jaw members to substantially prevent radioactive particles emitted by the radioactive stent from passing out of the crimping apparatus. An operating mechanism is operatively coupled to the first and second jaw members for selective movement between a loading condition and a crimping condition. In the loading condition, the uncrimped stent and the deployment device may be inserted through the opening and into the bore. In the crimping condition, the deformable stent is radially compressed onto the deployment device between the first and second compression surfaces.

A nuclear medical drug for localize radiotheraphy of a tumor and methods for its preparation. The drug includes a radioactive ceramic or glass particle having biocompatiblity. Ceramic or glass particles prepared by traditional processes become radioactive particles with pure beta -particle-emitting radionuclides after being irradiated with an appropriate flux of neutrons. The radioactive particle with suitable particle size can then be dispersed into a contrast medium for injection or can be implanted by operation.

Primary voltaic sources include nanofiber Schottky barrier arrays and a radioactive source including at least one radioactive element configured to emit radioactive particles. The arrays have a semiconductor component and a metallic component joined at a metal-semiconductor junction. The radioactive source is positioned proximate to the arrays such that at least a portion of the radioactive particles impinge on the arrays to produce a flow of electrons across the metal-semiconductor junction. Methods of producing voltaic sources include reacting at least one carbon oxide and a reducing agent in the presence of a substrate comprising a catalyst to form a solid carbon product over the substrate. Material is disposed over at least a portion of the solid carbon product to form a nanofiber Schottky barrier array. A radioactive source is disposed adjacent the nanofiber Schottky barrier array.

The invention relates to a radioactive particle implanting template and a fabrication method thereof. The fabrication method comprises the following steps: (1) collecting image data of tumor parts of a patient through a scanning system; (2) reading the image data obtained in the step (1) by a treatment planning system, and establishing a radioactive particle implanting plan according to the image data to obtain picture data containing the position, number, direction of needle passages and particle distribution information; (3) processing the image data by an image control system and a template design system on the basis of the picture data containing the position, number, direction of needle passages and particle distribution information in the step (2), and designing to obtain a digital template model containing patient face shape information and the position, number and direction distribution information of the needle passages; and (4) performing entity shaping by a template shaping system based on the digital template model obtained in the step (3) as a template, and preparing to obtain the entity radioactive particle implanting template. The radioactive particle implanting template is accurate and stable in positioning, and basically eliminates positioning error.

Therapeutic sources for use in the practice of brachytherapy comprise a radioactive composite that includes (a) a polymeric matrix and (b) a radioactive powder, e.g. Pd-103 or I-125, consisting essentially of very fine radioactive particles that are randomly and essentially uniformly dispersed within the polymeric matrix. The composite may be in the shape of one or more solid cylindrical rods surrounded by a non-radioactive sleeve. Alternatively it may be a hollow rod, suture, film, sheet, or microspheroidal particles. The composite may be shaped by molding, extrusion or other methods, may be made with a flexibility suitable to its intended use or may be encapsulated in a metallic capsule.

The invention discloses a biliary tract internal drainage tube carrying radioactive particles, which relates to the technical field of medical equipment and is a biliary tract internal drainage bracket capable of bearing a micro radioactive particle source. The biliary tract internal drainage tube comprises a drainage tube and a fixing barb, and is characterized in that: an organ cavity container is arranged on the inner wall of the drainage tube; organ cavity chambers are arranged in the organ cavity container. Each organ cavity chamber is separated by a one-way valve; and a marking point is arranged on each organ cavity chamber and made from a radiopaque material. An antiskid fixing barb is arranged outside the tube wall of the drainage tube; and radioactive particles which can be changed anytime are put in corresponding organ cavity chambers according to the position of the drainage tube inserted into the focus. The biliary tract internal drainage tube disclosed by the invention has the advantages of novel structure, low cost, safety, reliability, obvious curative effect and the like, and is simple to process, convenient to use and easy to operate, thereby being a novel biliary tract internal drainage tube carrying radioactive particles integrating economy and practicability.

The invention discloses an all-dimensional close-range seed implantation robot for the prostate and relates to the field of medical instruments. The robot is composed of a position adjustment mechanism, a cross joint gesture adjustment mechanism, an ultrasonic image navigation module, a seed implantation module and an operation table cart; by controlling a motor, the position and gesture of an ultrasonic probe can be adjusted, feeding and rotation motion around the axis of the ultrasonic probe are achieved, and a series of sequence ultrasonic images are obtained; under guide of the ultrasonicimages, by controlling the seed implantation module, the radioactive seed implantation treatment operation for the prostate cancer is completed. According to the robot, the defects can be overcome that in the traditional seed implantation operation process, due to the fatigued operation of doctors, the positioning precision and stability of manual operation are low, and the treatment process depends on the personal experience of the doctors. The operation efficiency and seed implantation precision are improved.

The invention discloses a near-distance image navigation full-automatic radioactive particle implanting device which comprises a puncture needle puncture module, a radioactive particle implanting module and a puncture needle rotating module. The puncture needle rotating module comprises a puncture needle, a puncture needle clamping head and a puncture needle rotating wheel which are coaxially arranged, a puncture needle rotating wire is wound on the puncture needle rotating wheel, the radioactive particle implanting module comprises a fixing barrel which supports the puncture needle rotating wheel and is in rotatable connection with the same, a radioactive particle clip is fixed on one side of the fixing barrel and communicated with the puncture needle, the front portion of a flexible probe wound on a probe driving wheel body is mounted in the puncture needle in an inserted manner, a probe driving wire is wound on a probe driving wheel, the puncture needle puncture module comprises a slider fixedly connected with the fixing sleeve, and the slider is connected with a spiral transmission module which is driven by a screw rotating wire. The near-distance image navigation full-automatic radioactive particle implanting device is high in radioactive particle implanting accuracy and high in speed, and damage to doctors by radioactive operating environment can be lowered.

The invention belongs to the technical field of surgical robot, and provides a radioactive particle implantation surgical robot, which comprises a puncture needle, a real-time image connecting module,a magazine module, a needle pushing module and a particle pushing module. The needle pushing module includes a slider for driving a magazine module, a particle pushing module and a puncture needle, and the slider is connected with a driving member for driving the slider. The radioactive particle implantation surgical robot also includes a force feedback module for collecting the axial force exerted on the puncture needle. The invention provides a surgical robot for implanting radioactive particles, which may propel the radioactive particles based on image navigation; therefore, the accurate positioning of the puncture needle guided by the ultrasonic image in the internal radiotherapy can be realized, the real-time force sensing and feedback in the puncture process, and the robot propulsion of the radioactive particles can avoid the operator from being harmed by the particle radiation, so that not only the positioning accuracy is high and the flexibility is strong, but also the treatment efficiency can be improved, the operator is protected, and the reliability and the safety are good.

The radiotherapeutic particle implanting gun is used for implanting radiotherapeutic particle into body of cancer patient. It includes a gun body, a handle, a particle gun capable of being inserted into the gun body, an implanting needle and a push rod. The gun body consists of a particle bin seat, a front cover plate, a back cover plate, an implanting needle pinch plate, and a push rod guiding tube. The implanting needle has a central hole and a conic tail hole, and is fitted to the push rod guiding tube. The particle bin includes a casing, a spring and a mandril inside the casing, and a particle storing holder screwed to the casing. The mandril under the action of the spring may be pushed to the bottom of the particle storing holder and the push rod may be pushed to implant the particle into the disease focus of the patient. The radiotherapeutic particle implanting gun may be used to implant over hundred particles.

Protective suits are used to protect the wearer against hazardous materials such as chemicals, pathogens, radioactive particles, electromagnetism, physical trauma and for rain protection. They are used to protect the wearer's surrounding in cleanrooms. Medical protective suits are used to prevent the spread of pathogens from the wearer. Unfortunately, they can cause heat stress by reducing air circulation. This invention discloses a protective suit with a breathing mask and dual one-way valves to draw air through the suit's interior using the forces generated by the wearer's breathing. Filters can be placed in the suit, or the suit can be made of a filter material to protect the wearer and the surroundings. The disclosed suit is lighter, less expensive to produce and more mobile than prior-art protective suit designs that use powered or externally supplied ventilation and cooling devices.

Methods and apparatuses for the removal, analysis and / or detection of harmful airborne molecular contaminants (AMCs). In one embodiment, an ionizing radiation source is utilized to remove the harmful AMCs from a flow stream via radiolytic particle generation and subsequent capture by filtration. The captured particles may be released, for example, by re-gasification for analysis at much higher concentrations. In another embodiment, the ionizing radiation source is utilized with a particle detector to sense when harmful AMCs are present. In one embodiment, a solid optical medium is exposed to a monitored environment so that the AMCs are in contact with a surface of the solid optical medium. A focused light beam is arranged to emerge from a solid optical medium at an energy density sufficient to cause the AMCs to form deposits on the exposed surface of the solid optical medium, which can be detected using an interferometric technique.

During the manual implantation process of radioactive particles, the technical skill of doctors is strictly required. In addition, the implantation workload of the particles is large, the surgical time is long, and the particle implantation precision also can be affected. In order to solve the problem, the invention relates to an electric particle implantation device for short-distance radioactive therapy. The electric particle implantation device comprises a soleplate, an outer needle drive module, an inner needle drive module, an inner needle, an outer needle and a radioactive particle supply module, and is characterized in that the soleplate is fixedly connected with an outer needle drive motor and an inner needle drive motor, an outer needle clamping sleeve is fixedly connected with the outer needle, the inner needle drive module is connected with the inner needle by virtue of a friction pair, the inner needle is a solid needle, the outer needle is a hollow needle, and the inner needle slides in the outer needle. The electric particle implantation device can be used as an end execution mechanism of a mechanical hand to automatically implant particles, the high-precision radioactive particle implantation surgical operation can be realized by adopting image navigation, and the electric particle implantation device also can be used as an electric handheld radioactive therapy particle implantation device and is simple in structure.

The invention relates to the field of the medical apparatus and instruments, it is a pipeline bracket which can bearing micro radiation particle resource, and it mainly used in the treatment of pancreatic cancer or bile duct cancer in the metaphase or late stage. It also has the function of conduction consisting of the drainage tube 1 and the face to face bards 2 mounted on the two ends of the drainage tube. The inner cavity of the drainage tube is the drainage cavity 1.1, the particle duct 1.2 that its diameter matching with the outer diameter of the micro radiation particle resource is mounted in the tube wall. The irradiation window 1.3 of the micro radiation particle resource is equipped in the outer wall. The length and width of the irradiation window are on the small side of the micro radiation particle resource. The invention is simple in structure, and can be posted in vivo by endoscope via tiny wound, convenient to use and has the function of actinotherapy and conduction.

The invention belongs to the technical field of medical instruments, in particular to a surgical robot for radioactive particle implantation, comprising a puncture needle propulsion module, a radioactive particle pushing module and an ultrasonic contrast module, wherein the propulsion slider is movably arranged on the propulsion guide rail, the end of the puncture needle is fixedly arranged on thepropulsion slider, the contrast ultrasound module is arranged on the puncture needle, and the propulsion slider is fixedly provided with a radioactive particle pushing module. By setting a force feedback sensor on the puncture needle propulsion module, the inve robot ntion can realize the real-time force sensing and feedback in the puncture process, and the robot propulsion of the radioactive particles; At that same time, a guide clip is arranged on the puncture needle, the angle of the puncture needle can be adjusted through the guide clip, and the ultrasonic contrast module is fixed on theguide clip, and the accurate positioning of the puncture needle guided by the ultrasonic image in the internal radiotherapy can be realized through the ultrasonic contrast module.

The invention discloses a radioactive particle implantation needle-driven robot which comprises an ultrasonic peripheral module, a needle head pushing module, a needle head storage module and a needlehead delivery module; the ultrasonic peripheral module comprises a needle automatic clamping assembly used for clamping a puncture needle; the needle head pushing module is used for rotating the ultrasonic peripheral module to be switched between a needle replacing position and a puncture position and is used for pushing in or pulling out the puncture needle in an axial direction of the punctureneedle; the needle head storage module comprises multiple needle storage bins; each needle storage bin is used for storing one puncture needle and can automatically reach a needle head delivery position; the needle head delivery module comprises an electric clamp and a horizontal conveying assembly; the electric clamp corresponds to the needle head delivery positions of the needle head storage module and is used for clamping the puncture needle in the needle storage bin at each needle head delivery position; and the horizontal conveying assembly is used for driving the electric clamp in the axial direction of each puncture needle to enable the puncture needle to be inserted into the needle automatic clamping assembly at the needle replacing position and to be automatically clamped by the needle automatic clamping assembly.

A sustained-release gel injection comprises sustained-release microspheres containing taxanes drug, amphiphilic block copolymer, solvent and release regulator, wherein the mixture of the amphiphilic block copolymer and the solvent has a temperature sensitive gelatinization characteristic, and can automatically become non-flowing degradable water insoluble gel, which can locally and slowly release drug at tumor foci for several weeks to several months, after injection into body. The preparation can be injected into or around a tumor for treating solid tumors at different stages. The preparation has the effects of controlling residual tumor cells relapsed after operation and tumors that can not be excised via operation, controlling complications at late stage of tumors, and enhancing treatment effect of chemotherapy and radiotherapy (particularly radioactive particles). The taxanes are selected from docetaxel, taxol, epitaxol, hydroxyl taxol and deacetyltaxol; the amphiphilic block copolymer is PLGA-PEG-PLGA copolymer, wherein the PEG has molecular weight of 1200-1600, accounting for 20 wt% of the amphiphilic block copolymer; and in the glycolide-lactide copolymer, the mol ratio of glycolide and lactide is 6:1.

The present invention belongs to the technique category of the medical instrument, relates to a tectorial conformal radiate NiTi alloy vascular inner rack which is implanted to the blood vessel of the human body. To settle the problems of that the existing vascular inner rack can not restrain the growth of the tumour and the thrombus is easy to form, etc., the bracket used by the invention is self-expanding NiTi alloy vascular inner rack, a layer of polycarbonate type polyurethane membrane is covered at the inner wall, the antineoplastic medicine is spraying-coated to the inner surface of the membrane, and the active particles which are used for the inner radiating of the tumour are inserted at the outer bracket of the membrane according to the conformal property. The NiTi alloy vascular inner rack applied by the invention can effectively expand and support the blood vessel; the novel film forming material polycarbonate type polyurethane has an excellent bioavailability; the active particles for the conformal radiotheraphy outside the membrane are inserted to the bracket with a simple and convenient double-buckle mode, the growth surround the blood vessel area is effectively restrained and the radioactive side injury of the normal tissue is reduced. The invention has the advantages of easy making, low cost, strong innovation and wide market prospect.

A radioactive seed implantation system particularly adapted for use in the treatment of prostate cancer, the system incorporating multiple individually longitudinally and infinitely adjustable needles carrying radioactive seeds which may be simultaneously and precisely implanted in a prostate gland with a minimum of surgical time and operating room expense while minimizing swelling of the gland and reducing patient trauma. An improved method of implanting radioactive seeds in a prostate gland is also disclosed.

An apparatus and method allows for the construction of an inflatable, protective enclosure that provides a temporary, contaminant free environment for one or more individuals. The approach results in a protective suit and / or enclosure that is inexpensive, compactly stored and light-weight, yet provides a reliable source of filtered, contaminant-free air as well as upper-body and / or full-body protection for one or more persons. The protective suits / enclosures described produce an over pressure environment within the protective enclosure so that a positive flow of filtered air is maintained between the interior of the suit or enclosure and the outside environment, thus assuring that no contaminants may seep into the protected, contaminant free interior. The protective enclosures protect individuals from contact with and inhalation of noxious chemicals, inorganic and organic dust and particles, as well as radioactive particles that would ordinarily be associated with industrial emergencies and / or an intentional terrorist attack.

A detection method that allows a fast, reliable, inexpensive and highly sensitive indication of a release of a radiological aerosol. The release could be of an accidental nature or it could be a deliberate act of terrorism. The release can be abrupt and energetic, such as an explosive surrounded by low-level radioactive medical waste or nuclear waste (dirty bomb), or the release can be stealthy and subtle by silently and clandestinely aerosolizing a low-level radioactive powder into ambient air. The described invention also details how to inexpensively and reliably test for the presence of dangerous radon gas.

The invention belongs to the technical field of radioactive particle implantation, and discloses a method for realizing radioactive particle implantation by using laser guidance, comprising the following steps: S1, marking a target area on the body surface of a patient; S2, obtaining the image examination data of the patient target area and introducing the image examination data into the processing system to generate a disease body model; 3, introducing the disease body model into a computer three-dimensional treatment plan system for dimension development, determining and adding a source lineof a puncture needle path, arranging radioactive particles on the source line, and derive the radioactive particles in the form of a three-dimensional data packet; S4, introducing the three-dimensional data packet into the orbit equipment and emitting laser rays according to the three-dimensional coordinate vector of the distribution source line; and 5, inserting a particle needle along that laser ray and implant radioactive particles. The invention adopts laser technology to guide, combines the advantages of freehand puncture and template puncture, shortens the preparation period before operating, lowers the cost, and can change the implantation scheme in time according to the change of the tumor in the patient body, and has strong flexibility.

The invention discloses a radioactive particle implanting device which comprises a base. Two sliding rods penetrate the upper portion of the base, the front ends of the sliding rods are fixedly connected with the upper portion of a skewback while the rear ends of the same are fixedly connected with the upper portion of a support, a Ruhr interface and a syringe needle are sequentially connected at a position of a front through hole of the base, a gun pipe is connected at a position of a rear through hole of the base, and a pushing rod is slidably connected in a duct, a rear through hole, a particle passage and a front through hole inside the gun pipe; a sterile injection water injecting pipe is arranged on the rear portion of a clip groove in the base, and a conical pipe is arranged at the front end of the Ruhr interface. The radioactive particle implanting device is simple in structure, easy to process and assemble and convenient to operate; a sliding rail sliding device is adopted, so that accurate positioning can be realized, and stability is high; by arranging digital scales on the surface of the gun tube, positioning distance is visualized; by arranging digital scales on the surface of a piston of a clip, number of remaining seed sources is visualized. By arranging the conical tube, source blocking caused by a gap at a joint of the syringe needle and the Ruhr interface can be prevented.

The invention discloses a puncture method, device and system under guide of CT and a readable storage medium and belongs to the technical field of medical equipment. The method comprises the steps asfollows: performing registration fusion on a CT image and a scene image acquired in real time to obtain a puncture navigation image containing a needle entering point, a target, a puncture navigationpath and the scene image. As the scene image is fused in the puncture navigation image, the whole puncture process can be displayed in the puncture navigation image in real time, so that the actual puncture path can be adjusted to coincide with the puncture navigation path in the puncture navigation image, and the puncture accuracy is improved. The method can be applied to fields of puncture biopsy of focuses and tissue at each part of the human body, puncture drainage of hydrops and vomicae, tumor microwaves, radio frequency ablation, implantation of radioactive particles, cold and hot ablation and irreversible electroporation and has larger application range. Besides, the method is lower in cost and the required device is convenient to deploy.

The invention discloses a multi-degree-of-freedom radioactive particle implantation robot based on ultrasonic guidance. The multi-degree-of-freedom radioactive particle implantation robot comprises afoundation bed, an XYZ three-axis movement platform, a two-degree-of-freedom rotation joint and a puncture device, wherein the XYZ three-axis movement platform is arranged on the foundation bed and comprises an X-axis movement arm; the two-degree-of-freedom rotation joint is installed on the X-axis movement arm and has a rotation degree of freedom in two directions; the puncture device comprises an installation seat, a puncture needle, a radioactive particle supply mechanism, a pushing mechanism and an ultrasonic probe, wherein the installation seat is arranged on the two-degree-of-freedom rotation joint; the puncture needle is arranged on the installation seat in a sliding way; the radioactive particle supply mechanism is arranged on the installation seat and comprises a cartridge holderused for storing radioactive particles and a pushing rod used for pushing the radioactive particles in the cartridge holder into the puncture needle; the pushing mechanism is arranged on the installation seat and is used for pushing the puncture needle to carry out straight-line needle insertion to a focus zone to implant the radioactive particles; and the ultrasonic probe is arranged on the installation seat and is used for obtaining the image of a focus. The whole robot has an artful structure, is cooperated with the ultrasonic probe to capture and feed back the image of the focus zone in real time, and can automatically, safely and accurately finish radioactive particle implantation surgery.

The invention relates to a radioactive particle implanting gun, which comprises a gun body, wherein the gun body is arranged on a handle; the front end of the gun body is provided with an adapter assembly; the back end of the gun body is provided with a push pin assembly; a cavity used for fixing a cartridge holder assembly is arranged in the gun body; and two holes penetrating through the gun body are formed in one side wall of the gun body, wherein a positioning pin is arranged in the hole near the top of the gun body; and a positioning pin cover is arranged in the hole near the bottom of the gun body. The radioactive particle implanting gun has the excellent effects that the adapter assembly, the gun body and the push pin assembly are designed into a whole; the problem that in the prior art, once alignment is needed when the push pin is pushed once, and then the insertion and the pulling out can be completed is solved; an operator can conveniently concentrate; meanwhile, the instrument compatibility is improved; all parts of the implanting gun are mutually independent; when the parts are damaged, only the damaged parts need to be replaced; the problem that the whole set of implanting equipment is scrapped in the prior art is solved; the structure is simple; the operation is convenient; and portability is realized.

The invention discloses a rechargeable particle catheter. The rechargeable particle catheter includes a catheter body, the catheter body is provided with a charge-in channel and a bag which surrounds the catheter body, one end of the charge-in channel is provided with a valve, the other end of the charge-in channel is communicated with the bag, the bag is provided with radioactive particles, and when the bag inflates, the inflated bag cannot extrude a drainage cavity. The rechargeable particle catheter can be widely used in obstructed or narrow cavities and tracts such as esophagi, stomach and intestines, bile ducts, nephric ducts and vena cave vessels in human bodies, and is wide in application prospect and high in application value. In the process of treating a patient, the catheter only needs to be introduced once, gas charging or liquid charging can be repeatedly conducted on the bag many times, after tumor treatment reaches an expected effect, gas discharging or liquid discharging can be conducted on the bag and then the particle catheter is taken out; multiple operations are not needed, the treatment process is simplified, treatment effects are ensured, the pain of patients is slight, wounds are small, and the rechargeable particle catheter is more acceptable to the patients.

A pacemaker is provided. The pacemaker includes a pulse generator and an electrode line connecting with the pulse generator. The electrode line includes a conductor, an insulation layer and a shielding layer. The insulation layer is located on an outer surface of the conductor. The shielding layer is located on an outer surface of the first insulation layer. The shielding layer is a carbon nanotube structure having a plurality of radioactive particles therein.

The invention relates to the technical field of medical apparatuses, in particular to a method for designing a pipe support capable of bearing miniature radioactive particle sources, wherein the pipe support is mainly used for internal radiation treatment of intermediate and late pancreatic cancer and malignant bile duct stenosis. The method can optimally design a concrete structure of the pipe support capable of bearing the miniature radioactive particle sources by utilizing natural cavities (including a common bile duct, a main pancreatic duct, an accessory pancreatic duct and so on) on the circumference of the pancreatic head of a human body. The method comprises: S1, designing the outside diameter of the support, the inside diameter of drainage cavities, the length of the support and so on; S2, selecting different support materials according to a clinic radiation planning, and selecting whether to apply materials with different shielding materials to seal a radiation window; and S3, designing the inside diameter of a particle channel, the dimension of the radiation window and interval arrangement. The method realizes the aims of precise positioning, precise planning and precise treatment, and achieves optimum internal radiation treatment effect.

The invention discloses an efficient axle-type gun-type radioactive particulate implanter, including a thimble, a puncture needle, a puncture needle-pushing device, a limiting device, a particulate storage unit, an implant gun body, handles and a scale. An upper end portion of that handle is connected with a lower end surface of the implant gun body, and the handle and the implant gun body form apistol-like structure. A scale is arranged on that outer wall of the gun body of the implant. The right end portion of the thimble is disposed in the left end portion of the implant gun body, and theleft end portion of the thimble extends out of the implant gun body, the puncture needle is disposed in the right end portion of the implant gun body and is connected with a puncture needle pushing device, the limiting device is disposed in the implant gun body, and the particle storage device is fixed on the handle. As that particle are stored in the particle storage device, the particles can becontinuously implanted according to the need, the pistol-type structure is adopt, the palm of the hand is convenient to grasp, and the puncture penetration depth can be set by a scale and a limiting device.