373results about How to "Easy to puncture" patented technology

A substance packaging container, preferably for packaging a liquid or powder substance, includes a sealed first chamber (4) for the substance (6) to be packaged. The substance chamber (4) is comprised of a flexible material, such as a foil material. The container also includes a sealed, rigid second chamber (8) which is disposed inside the substance chamber (4).

The present invention discloses a medicament cartridge for an injection device, such as a syringe or a jet injector. The medicament cartridge according to the present invention includes a tube having a lumen, a needle operatively associated with an end of the tube and having a piercing end extending into the lumen, a second stopper located within the lumen near the other end of the tube and moveable within the lumen, and a first stopper located within the lumen, covering the piercing end of the needle, and moveable within the lumen. Firing the injection device to commence an injection may move the second stopper toward the needle, which compresses medicament located in the lumen between the first stopper and the second stopper. The compression of the medicament moves the first stopper into contact with the piercing end of the needle so that the piercing end pierces the first stopper to thereby create a fluid pathway for the medicament through the needle. Other methods of piercing the first stopper are anticipated as a means of activating the injection device. The disclosed medicament cartridge can be safely and aseptically manufactured and filled during assembly and, once manufactured and filled, eliminates contact between the medicament and the needle during storage.

The invention discloses an empty micropin array chip which comprises a substrate and an empty micropin, wherein the empty micropin comprises a pin head and a pin rod, the empty micropin is fixed on the substrate through the pin rod and is inclined to the substrate at a certain angle, the pin head is provided with an oval-shaped annular plane, one end of the pin head is a pinpoint, one part of the oval-shaped annular plane is embedded into the substrate, the pin rod is an empty circular pipe which is embedded into the substrate or is penetrated through the substrate, the bottom of the pin rod is parallel with the lower surface of the substrate or is convex or concave, and the empty micropin penetrates through the two sides of the substrate to be formed into the hole-shaped micropin or the bottom of the pin rod is sealed to be formed into a blind hole type micropin. The empty micropin array chip is firm in structure, sharp in pinpoint, convenient in puncture, low in cost, high in yield, and suitable for manufacture in bulk. The micropin in the array has good consistency, is free of pain feel and blooding when in use, and is safe and reliable since the minimally-invasive skin can fast heal after in use.

The invention discloses a micro-needle array chip, which comprises a micro-needle and a substrate. The micro-needle consists of a needle head, a needle rod and a needle base; the top of the needle head is provided with a needle point; the micro-needle is fixed on the substrate through the needle base; the needle rod of the micro-needle is cylindrical or conical; the needle rod is inclined to the substrate at a set angle; and the needle head is conical or the upper surface of the needle point is an elliptical plane which is parallel to the substrate or inclined to the substrate at a set acute angle. The metal micro-needle in the micro-needle array chip is firm in structure and cannot rupture; the needle point is sharp and convenient to puncture; the maximum puncture depth of the micro-needle is easily regulated and controlled; the micro-needle in the array has good consistency and are safe and reliable to use; and the hollow micro-needle has a side opening similar to that of the traditional needle. Therefore, the micro-needle array chip can effectively avoid the phenomenon that the skin blocks the infusion hole, is more favorable for rapid diffusion and absorption of medicaments, and has obvious curative effect.

The invention relates to a micro-needle array chip, a transdermal delivery device, a transdermal delivery patch and a preparation method thereof, wherein a micro-needle is obliquely fixed on a substrate at a set angle, the upper surface of the needle is an elliptic plane parallel to the substrate or obliquely provided with an acute angle, the needle is further treated to have more edge angles, a metal wire bar or tube penetrates a non-metallic material substrate such as polymer and the like along a certain angle, and then a nick of the metal wire bar or tube on the substrate is grinded and polished; and photosensitive resist patterns are formed nearby the nick at one end by adopting photoetching and etching technology, then the metal wire bar or tube is subjected to chemical or electrochemical corrosion to form a needle point and the photosensitive resist is removed, the surface of the manufactured solid micro-needle array chip can be covered with drugs, and the manufactured solid micro-needle array chip can deliver liquid medicine or extract body fluid. The method avoids the skin plugging a transfusion hole, is easy to adjust and control the maximum penetrating depth of the micro-needle, and is suitable for percutaneous transportation of biological macromolecular drugs and cosmetics and skincare and new percutaneous preparation of the prior drugs.

The invention discloses a puncturing and positioning device which comprises a bed plate, a puncturing template bracket arranged on the bed plate and a puncturing template arranged on the puncturing template bracket, wherein the puncturing template bracket comprises an upper bracket on the upper part and a base on the lower part; the upper bracket can move up and down relative to the base and be locked to regulate the height of the puncturing template; the base of the puncturing template bracket can slide along the length direction of the bed plate and be locked; and the puncturing template can slide and rotate along the upper bracket in the width direction of the bed plate. In a puncturing operation, through the guide of CT (Computed Tomography), puncturing and positioning can be exactly realized through adjusting the position and the angle of the puncturing template and guaranteed to be accurate, and the puncturing operation is convenient. The puncturing template can also guarantee that puncturing implants are uniformly distributed as required, and moreover, the puncturing and positioning device can realize multi-point puncturing, save the operation time and has high puncturing efficiency.

A safe and automatic puncture outfit for endoscopic surgery is characterized by comprising a channel assembly, a limiting device and a puncture needle, wherein the puncture needle comprises a holding part, a needle body and a lead screw driving device; the needle body comprises a needle body casing and a hollow needle rod arranged in the needle body casing; the lead screw driving device is arranged in the needle body casing and connected with the hollow needle rod and comprises a drive motor, a lead screw and a lead screw nut; the drive motor is arranged at the top of the inner side of a pillow body casing and is connected with the lead screw; the lead screw extends into the hollow needle rod; the lead screw nut is nested on the lead screw, connected with the inner side wall of the hollow needle rod and driven by the lead screw to perform linear reciprocating motion; the puncture outfit further comprises a rotating system which comprises a rotating motor, a miniature rotating encoder and a control system. The safe and automatic puncture outfit can realize automatic puncture, has practical and reliable functions and can maintain constant carbon dioxide pressure of an operating cavity while intelligently releasing smoke in a puncture tube and an operating field.

The invention discloses an integration construction method for a basement soleplate and a waterproof roll as well as a waterproof structure. The waterproof structure is characterized in that a pre-paving type self-adhered membrane waterproof roll is paved on the horizontal plane of a pad layer of the basement soleplate; self-adhered modified asphalt waterproof rolls are paved on internal and external corners of the structure; a cement binding agent coats on a lap-joint part of the pre-paving type self-adhered membrane waterproof roll and the self-adhered modified asphalt waterproof rolls; and the basement soleplate is cast to upper portions of the pre-paving type self-adhered membrane waterproof roll and the self-adhered modified asphalt waterproof rolls to form an integrated waterproof layer. According to the integration construction method and the waterproof structure, two different waterproof rolls are paved on the pad layer of the basement soleplate to carry out waterproof construction, so that the roll waterproof layers are tightly combined with the soleplate structure to the form the integrated waterproof layer, and therefore, water can be completely prevented from entering gaps between the waterproof rolls and the structure.

The invention discloses a bone tumour surgery puncture locating device capable of accurately locating and guiding. The device comprises two mounting plates, the left ends and right ends of the two mounting plates are all connected through connecting frames, connecting rods of the connecting frames are fixedly connected with the inner side faces of the mounting plates, the lower surfaces of the mounting plates are provided with lifting frames, telescopic ends of first telescopic rods of the lifting frames are fixedly connected with the lower surfaces of the mounting plates, fixing ends of the first telescopic rods are provided with bottom plates, the upper surfaces of the bottom plates are provided with mounting holes, fixing bolts are movably inserted in the mounting holes, and the side faces of the mounting plates are provided with sliding grooves. The bone tumour surgery puncture locating device capable of accurately locating and guiding has the advantages that the height can be adjusted, the position and inclination angle of a location sleeve can be adjusted, a puncture needle can be accurately located conveniently, the shaking of the puncture needle is avoided, the puncturing depth can also be precisely controlled, the pain of a patient is reduced, the operation is simple, and the use is convenient.

The invention discloses a wireless control simulation tire burst apparatus. The apparatus is arranged on a spoke. The simulation tire burst apparatus comprises a controller, a linear motor and at least two levers. The controller is fixedly arranged on the spoke. An input end of the controller is wirelessly connected to an external remote controller. The linear motor is fixedly arranged at a center of the spoke. An axis of a lead screw of the linear motor is superposed with an axis of a wheel rotation axis. The linear motor is connected to an output end of the controller. The at least two levers are uniformly distributed along a radial direction of a wheel. One end of each lever is slidingly connected to the lead screw through a lead screw nut, the other end is provided with a puncturing knife, and a central section is rotatably connected about a fixing support which is fixedly arranged on the spoke. A knifepoint of the puncturing knife faces towards a tyre side wall. The simulation tire burst apparatus can be applied to tire burst tests of various models under different speed road conditions, the structure is simple, simulation control precision is high, abruptness and randomness of tire burst are increased, and a vivid simulation tire burst experience is provided for a driver.

The invention discloses a liquid crystal display panel which comprises an upper substrate, a lower substrate, a liquid crystal filled between the upper substrate and the lower substrate, a frame of a closed cavity encircled by the upper substrate and the lower substrate, and a circle of first spacer retaining walls which are positioned on the inner side of the frame and are arranged on the lower substrate, wherein the height of each first spacer retaining wall is higher than the box thickness formed in the process of boxing the upper substrate and the lower substrate; and channels through which the liquid crystal flow are formed between the end surfaces of the first spacer retaining walls and the inner surface of the upper substrate at intervals. The invention also discloses a display device. The speed of allowing the liquid crystal to flow to frame sealing glue can be reduced, the liquid crystal is well prevented from flowing to frame sealing glue before the liquid crystal is filled with the space in the spacer retaining walls, the mode of allowing the liquid crystal to rapidly and comprehensively impacting the frame sealing glue in the horizontal direction is changed into a mode of locally and slowly contacting in the vertical direction, and the problems such as frame sealing glue puncture and liquid crystal pollution are solved. In addition, the problem of non-uniform box thickness is solved.

Provided is a microneedle device which protects microneedles, has an easily portable shape, is free from such problems as breakage of fine needles in the step of puncturing the skin with the microneedles, and ensures appropriate skin puncture to administer a drug. By studying the relationship between the device to be pressed to the skin and the height of the elevation of the skin surface during the pressing, it is found that there is a positive correlation between the placement and interval of skin fixation members and the height of the elevation of the skin. It is furthermore found that the elevated skin surface is always parallel to the flat plate of the device. This reveals that since the microneedles installed at the device can be inserted at right angle to the skin surface, the skin can reliably be punctuated avoiding the breakage etc. of the fine needles of the microneedles. Thus, a microneedle patch which is easily portable and ensures convenient drug administration to the skin can be produced.

The invention relates to a disposable safe transfusion needle composed of a conduit, a puncture needle stand, a puncture needle, a spring and a protective sleeve, characterized in that: the protective sleeve is in the needle point position of the puncture needle and completely covers the needle point when leaving factory; when in use, the handle of the protective sleeve is pinched by hand, then the protective sleeve is distorted so that the needle point of the puncture needle points to the needle point outlet on the protective sleeve, and then the protective sleeve is pulled downwards to protrude out the puncture needle until the protective sleeve is clamped with the needle stand; and after being used, the protective sleeve is lightly pushed to the direction deviated from the needle handle by hand, the protective sleeve clamped with the puncture needle stand is disengaged; and due to the actions of the spring and an inner inclined surface on the protective sleeve, when the needle point returns into the protective sleeve, the needle point automatically deflects in the direction without freely protruding forwards.

The invention discloses a tube breaking mechanism, a sealed test tube assembly comprising the tube breaking mechanism and application of the sealed test tube assembly. The tube breaking mechanism comprises a piercing component and a supporting component. The piercing component comprises a body and a shrinking part. The outer side face of the piercing component or the outer side face of the supporting component is asymmetrically distributed relative to the center of the supporting component. The sealed test tube assembly comprises the tube breaking mechanism, a solution tube and a sleeve tube. The solution tube is embedded and inserted into the sleeve tube to form a sealed and embedded bottom space. The tube breaking mechanism is located below the bottom of the solution tube embedded in the sleeve tube and used for piercing the bottom of the solution tube. After the bottom of the solution tube is pierced, at least two gap channels are formed by the outer side face of the tube breaking mechanism and a fractured hole in the bottom of the solution tube, a solution in the solution tube can flow out of the solution tube, and air in the sleeve tube can enter the solution tube. The solution tube can be pierced quite conveniently through the tube breaking mechanism. The sealed test tube assembly does not leak, is widely applied and is good in effect.

The invention relates to a transfusion container sealing cover with an easily-torn sealing membrane transfusion pipe and a drug feeding pipe, belonging to a liquid inlet and outlet pipeline and a pipeline sealing device of a transfusion bottle (bag). The easily-torn sealing membrane transfusion pipe and the drug feeding pipe are fixed on the same surface of a cover bottom sheet of a cover body in parallel; the easily-torn membrane transfusion pipe comprises an easily-torn sealing membrane transfusion needle guide pipe and an easily-torn sealing membrane; the drug feeding pipe comprises a drug feeding pipe body, a gasket, a gasket fixing ring and an easy-open cover, the gasket is arranged on a gasket membrane, and the gasket fixing ring is arranged on the gasket; and the cover body comprises the circular cover bottom sheet, a hollow cylinder formed by connecting the side walls of the cover, and a cylinder welding ring formed by outwards extending the edge of the hollow cylinder. The invention has the advantages that double-pipe combiner can realize two functions of drug feeding and transfusion, and has difficult scrap dropping and easy puncture in the process of transfusing puncture; and the transfusion container sealing cover also has lower production cost.

The invention relates to a tumor locating method and system for tumor puncture. The method comprises the following steps of 1, making locating mark points on the peripheral body surface skin of a tumor part of a patient, collecting two images of the tumor part of the patient from different angles, and obtaining the spatial position information of a geometric center point of the tumor part relativeto the locating mark points by means of a binocular vision algorithm; 2, performing CT scanning on the tumor part of the patient, establishing a three-dimensional model of a tumor according to a CT scanning image, and acquiring body posture information of the patient during CT scanning on the tumor part of the patient. By adopting the locating method, the tumor can be precisely located, a puncture path can be conveniently planned by medical staff, the puncture efficiency can be improved, and the radiation injury can be reduced.

The invention provides a method of making a milky coffee drink with a capsule drink machine. The capsule drink machine comprises a base, a brewing chamber, a control panel, a brewing head, an inflow piercing needle, an extraction piercing needle, a liquid supply mechanism and a brewing cup for receiving milky coffee capsules; each milky coffee capsule includes a capsule body and a membrane and also includes a separator for liquid passage, the separator is arranged in the capsule body and divides an inner cavity of the capsule body into a first cavity and a second cavity, milk powder is arranged in the first cavity, and coffee powder is arranged in the second cavity; the method comprises the steps of emulsifying, extracting and mixing; sequentially, the milk powder is emulsified and brewed, the coffee powder is extracted and filtered, and milk and coffee liquids are mixed into a milky coffee drink; in the method, the milk and coffee liquids are mixed well, the milk liquid never floats on the surface of the coffee liquid, the taste of the milky coffee drink is enhanced, and the milky coffee drink has good color and appearance.

The invention discloses an efficient agricultural integrated machine for turning over and watering soil. The integrated machine comprises a mobile vehicle, a water tank, a water inlet tube, a rotary shaft, a heater, a spray plate, a camera, an illumination light, a coulter, a crushing roller, a cleaning rake and a storage battery, wherein support legs are arranged at the bottom surface of the mobile vehicle, the mobile vehicle is internally provided with the water tank, the top of the water tank is provided with the water inlet tube, the rotary shaft is provided with a plurality of groups of agitating blades, the bottom of the rotary shaft is provided with the heater, the bottom of the water tank is provided with a water convey tube, the spray plate is movably arranged at the outlet of thewater convey tube, the illumination light is arranged on the side wall of the front end of the mobile vehicle, a transverse rod is arranged at the bottom of the front side wall of the mobile vehicle,the transverse rod is provided with a rotary motor, a first lifting rod is arranged at the bottom surface of the transverse rod, the bottom of the first lifting rod is provided with the coulter, crushing teeth are uniformly arranged on the outer wall of the crushing roller, the bottom surface of the transverse rod is provided with a second lifting rod, the bottom of the second lifting rod is provided with the cleaning rake, and the bottom surface of the mobile vehicle is provided with an ionizing bar. The integrated machine can well water and flatten ground soil, has a simple structure, is convenient to use, and can be promoted.

A pipeline butt joint operation bin for peritoneal dialysis comprises a transparent foldable sealing bin body and two supports for supporting the sealing bin body. Two ends of the sealing bin body are recessed into the sealing bin body so that operation handles are formed, at least one air inlet hole and two slots are arranged on the sealing bin body, a peritoneal dialysis tube and a dialysis fluid tube penetrate into the sealing bin via the slots respectively, two channels are respectively arranged along the slot of the peritoneal dialysis tube and the slot of the dialysis fluid tube and extend towards the sealing bin body, the peritoneal dialysis tube and the dialysis fluid tube respectively penetrate through the slots to enter the channels, a waste bag and a storage bag are disposed on the inner wall of the sealing bin body, the waste bag is used for storing waste iodophor caps and dialysis fluid tube caps, and the storage bag is used for holding standby iodophor caps. The pipeline butt joint operation bin can protect an opening of the peritoneal dialysis tube and an opening of the dialysis fluid tube, effectively prevents suspicious pollutants from entering a human body via dialysis fluid, and avoids peritoneal infection.

The invention discloses a cardiovascular intervention device, which comprises a puncture device and a fixed device, wherein the puncture device comprises a needle tube; the needle tube is formed by threaded connection of a front end with a through hole, a plurality of sleeve tubes and a tail end with a rear wing; a membrane breaking tube is arranged on the top part of the front end; a needle head is arranged on one end, stretching out of the needle tube, of the membrane breaking tube; the other end of the membrane breaking tube extends into the needle tube; a push rod is arranged in the needle tube and is formed by threaded connection of a rubber plug, a plurality of sleeve tubes and a tail end with a push rod; a liquid storage cavity is arranged on one side of the front end of the push rod; a liquid inlet is formed in one side of the rubber plug; a through hole adaptive to the membrane breaking tube is formed in the rubber plug; a gauze sleeve is arranged on the through hole; a wire guide rod is arranged in the push rod; one end of the wire guide rod is communicated with the through hole; the other end tip of the wire guide rod extends out of the tail end with the push rod. According to the cardiovascular intervention device, doctors can operate more conveniently and accurately, blood is collected in a collection bag, the operation surface of the doctors is not polluted, the guidance of a guidewire is completed, meanwhile, the guidewire is disinfected, and the lengths of the needle tube and the push rod can be adjusted according to the needs.

The invention discloses a carbonate mineral dolomitization simulation study system and an application method thereof. The system comprises a reaction device, a carbon dioxide device, an Mg / Ca device, a multi-functional sprue (NaCl, Na2CO3, and NaHCO3 solutions and microbial liquid can be injected herein), a pH device, a sterile filter and a mineral storage chamber, and also comprises a stirrer and a temperature control device. The carbonate mineral in the reaction device can be subjected to dolomitization under the conditions of certain pressure, temperature, CO2 concentration, Mg / Ca fluid, different concentrations of NaCl and Na2CO3 / NaHCO3 solutions and microbial liquid, pH and the like; the solution is extracted by the sterile filter, and the parameters of dolomitization are measured; the generated mineral can be obtained from the mineral storage chamber. The carbonate mineral dolomitization simulation study system and the application method thereof provided by the invention can help to study the impact of different pressures, temperatures, Mg / Ca, salt concentrations, ionic strength and microbes on the dolomitization of carbonate mineral.

The invention discloses a sliding-type anesthesia puncture fixing device for clinical use in a pain department. The sliding-type anesthesia puncture fixing device comprises a fixing main body detachably installed on a bed body; the fixing main body includes a vertical pipe in a vertical direction; a lower fixing block is fixed to the left side of the lower end of the vertical pipe; a double-head motor is fixed to the inner side of the vertical pipe; a butting block is fixed to a lower output end of the double-head motor; the butting block is provided with a rectangular groove; the inner side of the lower end of the vertical pipe is rotationally connected with a threaded pipe of which the inner side is rectangular; a rectangular rod opposite to the rectangular groove is movably connected with the inner side of the threaded pipe in an inserted manner; the lower end of the rectangular rod is rotationally connected with a grab handle located below the vertical pipe; a limiting ring locatedabove the threaded pipe is fixedly arranged at the outer side of the upper end of the rectangular rod in a sleeving manner; and the threaded pipe is in threaded connection with an upper fixing blockwhich can move in the vertical direction. The sliding-type anesthesia puncture fixing device can be conveniently fixed onto a bed, is convenient to use and has a good using effect; the installation position can be changed as needed, and meanwhile, the height and the angle can also be adjusted.

The invention discloses an electrode assembly which comprises a first polar plate, and two second polar plates, wherein active material layers are coated on two surfaces of the first polar plate, the first polar plate is continuously bent into a Z shape of a vertical cross-section along the length direction of the first polar plate, an active material layer is coated on one surface of the second polar plate, each second polar plate is continuously bent into a Z shape of a vertical cross-section along the length direction of the second polar plate, two surfaces of the first polar plate, coated with the active material layers, are respectively opposite to surfaces of the two second polar plates, coated with the active material layers, an isolating layer is arranged between the surfaces of the first polar plate, which are opposite to the second polar plates, and the first polar plate and the second polar plates are respectively provided with a contact region with connected leads. The electrode assembly is low in requirement of production equipment, is easy to process and manufacture, and is relatively prolonged in service life. The material utilization rate of the electrode assembly can be increased, the cost is lowered, and the energy density of a battery is improved, so that the volume of the electrode assembly is relatively reduced under the same capacity.

The invention discloses an automatic CT puncture locator device. The device includes a bed body, a guide needle, a bracket A, a rotating shaft, a driving unit A, a stepping motor A, a stepping motor B, a screw rod A, a stepping motor C, a driving unit B, a bracket B, a stepper motor D, a screw rod B, a logic control unit, a bracket C, a driving unit C, a stepping motor E, a screw rod C, a stepping motor F, a driving unit D, and a bracket D, the stepping motor is installed on the bed body, two ends of the screw rod A are respectively installed on the bed body and the stepping motor B, the screw rod C is vertically arranged on the screw rod A in a staggered manner through the bracket B, and the screw rod B is horizontally arranged on the bracket C in a crossed manner through the screw rod C, the driving unit B is mounted on the bracket C, the rotating shaft is vertically mounted on the screw rod B through the bracket D, the guide needle is vertically mounted on the rotating shaft through the bracket A, and the logic control unit is mounted on the bed body.

The invention discloses an efficient mounting method for waterproof plate coating-free sealant, and belongs to the field of waterproof plates. According to the efficient mounting method for the waterproof plate coating-free sealant, during mounting, two adjacent waterproof plates are extruded to enable a plurality of top bag dispersed bundles to pierce a gas-liquid bag, on one hand, the sealant inthe gas-liquid bag can gradually overflow, a waterproof glue layer is formed between the two waterproof plates, waterproof sealing between the two waterproof plates is achieved, compared with the prior art that sealant is manually smeared, the workload of workers is remarkably reduced, and then the mounting efficiency is improved; and on the other hand, inert gas in the double-layer gas-liquid bag overflows as well, the air convection speed of the overflowing sealant can be increased, the airing speed of the sealant is remarkably increased, the mounting efficiency is further improved, meanwhile, after the gas-liquid bag is pierced, the constraint effect of pre-dispersed bundles is relieved, the pre-dispersed bundles are dispersed and serve as keels of the waterproof glue layer, and the waterproof glue layer is higher in strength and not easily damaged.

The invention discloses a sealing device of a minimally invasive disposable puncture apparatus, relates to a sealing device used with a minimally invasive disposable puncture apparatus, and discloses an assorted surgical instrument of a minimally invasive endoscope. The sealing device comprises a locking fixing cover, a split type elastic sealing ring assembly, a positioning compressing ring and a positioning guide cover; the split type elastic sealing ring assembly comprises an outer elastic sealing ring, an inner elastic sealing ring, a first elastic cloth layer, a second elastic cloth layer, an upper fixing ring and a lower fixing ring; an elastic ring with elastic wrinkles is arranged on the outer periphery of the outer elastic sealing ring, a compressing ring positioning groove is formed in the outer elastic sealing ring, and lower fixing ring mounting positioning holes are formed in the inner periphery of the outer elastic sealing ring; the split type elastic sealing ring assembly is mounted on a mounting platform at the upper end of the locking fixing cover, the positioning guide cover is mounted on the upper portion of the positioning compressing ring, and positioning protrusions of the positioning guide cover are pressed in positioning guide cover positioning grooves in the locking fixing cover and are fixedly welded in the positioning guide cover positioning grooves. The sealing device has the advantage that the sealing device is applicable to building working channels for abdominal cavity surgery in laparoscopy and surgery procedures.

The invention provides a positioning auxiliary device for a peripheral arteriovenous puncture indwelling catheter. The positioning auxiliary device for the peripheral arteriovenous puncture indwelling catheter comprises a bottom plate, a support and a positioning structure; and the positioning structure is arranged on one side of the support. According to the positioning auxiliary device for the peripheral arteriovenous puncture indwelling catheter provided by the invention, the positioning structure is arranged and can be used in cooperation with the puncture indwelling catheter; the positioning auxiliary device serves as an auxiliary positioning structure of the puncture indwelling catheter; assistance is provided for practice medical staff; the puncture indwelling catheter is effectively positioned when arteries of a patient are punctured; the practice medical personnel only need to push the puncture indwelling catheter to move; the puncture indwelling catheter does not need to be held by hands to move all the time; then, the direct contact area of the hand and the puncture indwelling catheter is greatly reduced; even if the conditions of hand shaking, hand slipping and the like due to tension occur, the influence on the puncture indwelling catheter can be reduced to the minimum; and therefore, the puncture indwelling catheter always moves in a relatively stable state, so that the puncture success rate is greatly improved.

The invention relates to a drainage tube, comprising a drainage tube main body, wherein the back end of the drainage tube main body is a joint end, the front end of the drainage tube main body is a drainage head tube, three support strips extending along the length direction of the drainage head tube are arranged in the drainage head tube, the side edges of the three support strips are connected integrally in one length direction, the side edges of the three support strips in the other length direction are connected integrally with the inner wall of the drainage head tube, and a plurality of diversion holes are formed in both the pipe wall and the support strips of the drainage head tube. The drainage tube has the beneficial effects that the three support strips are arranged in the drainage head tube for supporting the drainage head tube, and the diversion holes are formed in the pipe wall and the support strips of the drainage head tube, so that purulence, blood and liquid can flow from a body into the drainage tube and can circulate in three cavities of the drainage tube; the whole drainage tube can be prevented from being blocked when the drainage tube is compressed in a human body or one cavity is blocked by blood clots and necrotic tissues; and the drainage tube is safe, reliable and simple in use.