194 results about "Drug injection" patented technology

The invention provides a closed pit coal mine acid old kiln water outflow point pretreatment device, and belongs to the technical field of solid-liquid separation, the closed pit coal mine acid old kiln water outflow point pretreatment device comprises a purification unit, a first telescopic piece and an impurity conveying unit, the purification unit comprises a frame body, a screen drum, a water plugging sleeve, a medicine injection nozzle and a medicine dispensing tank, the screen drum is connected to the frame body, and a first valve is installed at an outlet in the bottom of the screen drum; the water plugging sleeve is arranged on the periphery of the screen drum, the water plugging sleeve is in sliding connection with the screen drum, the medicine injection nozzle is arranged in the screen drum, and the medicine injection nozzle is communicated with the medicine dispensing tank; the first telescopic piece stretches out and draws back along the axis of the screen drum, the fixed end of the first telescopic piece is fixedly connected with the frame body, and the telescopic end of the first telescopic piece is fixedly connected with the water plugging sleeve. The impurity conveying unit comprises a first impurity guiding pipe and a first transferring assembly, an opening of the first impurity guiding pipe is in butt joint with the outlet, and the first transferring assembly is connected into the screen drum and used for conveying impurities in the screen drum into the first impurity guiding pipe. The treatment efficiency of the old kiln water is improved.

The present disclosure relates to a skin treatment device, the skin treatment device comprising: a main body including a control unit that controls the operation of the skin treatment device and a power source unit that supplies power to the medical skin treatment device; a transfer unit for moving the main body; and a handpiece which receives power from the power source unit of the main body, is controlled by the control unit, and has one side that comes into contact with the skin of a patient to radiate therapeutic energy below the skin surface of the patient and thus improve the skin.

Provided is a system using smart contact lenses for measuring biosignals, the system comprising: smart contact lenses for measuring biosignals or injecting drug into the human body; and an accessory device for communicating with the smart contact lenses and supplying power thereto, wherein the smart contact lenses and accessory device are each provided with at least one electrode for connecting to the human body, and transmit and receive electrical signals between each other using the human body as the medium, and the smart contact lenses are provided with a power reception circuit for receiving operational power from the drug injection device.

The invention discloses a real-time processing method for a data missing value of a regional radiation monitor, and relates to the technical field of data processing, and the method comprises the steps: obtaining indoor radiation sequence data and outdoor radiation sequence data generated in the operation process of the regional radiation monitor in a historical time period; determining a medicine injection moment based on fluctuation characteristics of the intragate radiation sequence data; based on the time corresponding relation among the medicine injection time, the indoor radiation sequence data and the outdoor radiation sequence data, the outdoor performance time is determined, multiple suspected outdoor performance time before the current time are compared with the outdoor performance time in the historical time period, and the true probability of the suspected outdoor performance time is obtained; based on the true probability, the radiation fluctuation integrity degree of the in-gate radiation sequence data processed through a linear interpolation method is judged; and generating a required data compensation measure based on the radiation fluctuation integrity degree. The technical effect of improving the judgment accuracy of the abnormal radiation event is achieved.

Disclosed are a method for controlling an electrical treatment device with injection function and an electrical treatment device. The method includes: driving ends of a plurality of needle bodies to penetrate at least one target depths of a skin tissue by a actuator, and controlling the plurality of the needle bodies to electrically connect to an electric energy output assembly to release an electric energy at least one target depths of the skin tissue, and / or controlling the plurality of the needle bodies to connect to a liquid storage unit to perform drug injection based on at least one target depths of the skin tissue.

The invention relates to the technical field of medical instruments, in particular to a multi-channel analgesia pump with remote monitoring and control functions, which comprises a disposable multi-channel analgesia pump and a non-disposable multi-channel analgesia pump, each of the disposable multi-channel analgesia pump and the non-disposable multi-channel analgesia pump comprises a multi-channel analgesia pump main body, a microfluidic liquid medicine delivery system, a multi-channel liquid medicine injection system, a wireless communication module and a remote control terminal. The disposable multi-channel analgesia pump or the non-disposable multi-channel analgesia pump can be selected according to the actual condition of a patient, and the flexibility and the practicability are high; by arranging the micro-fluidic liquid medicine delivery system, accurate release of liquid medicine doses in different channel liquid medicine injection units can be ensured, cross contamination of liquid medicine in the channel liquid medicine injection units is avoided, the analgesic effect is effectively improved, potential safety hazards caused by mixed use of the liquid medicine or inaccurate release of the liquid medicine are reduced, and the analgesic effect is improved. The safety and the effect of clinical treatment are improved.

The invention discloses an intelligent tree trunk punching and medicine injection integrated device which comprises a device body, a liquid storage cavity used for storing liquid medicine and a battery bin used for containing a battery pack are formed in the device body, a drilling mechanism and a medicine injection mechanism are arranged on the two sides of the device body respectively, and a diameter measuring mechanism used for measuring the diameter of a tree trunk is arranged at the top of the device body; the drilling mechanism, the medicine injection mechanism and the diameter measuring mechanism are powered by the battery pack, and the device body is further provided with straps for bearing. The drilling mechanism comprises a drilling machine, the drilling machine comprises a first output shaft, a containing hole is formed in the center of the end of the first output shaft, and an inner drill bit and a micro motor are arranged in the containing hole; the medicine injection mechanism comprises a medicine injection pipe communicated with the liquid storage cavity, an on-off valve for controlling the on-off of the medicine injection pipe and a pump machine for driving liquid medicine in the liquid storage cavity to be discharged, the medicine injection pipe is sleeved with a plurality of blocking sleeves, and the blocking sleeves are made of nanocellulose / polyacrylic acid compounds with the water swelling characteristic.

The present invention relates to a drug injection multi-needle of which the surface to come into contact with the skin provides either a cooling or warming sensation so that pain can be reduced and, simultaneously, a hemostatic effect can be increased and, specifically, comprises: an injection part to which a drug syringe for storing a drug is coupled and into which the drug is injected by means of pressure; a needle coupling part which is coupled to the front surface of the injection part and to which a plurality of needles to penetrate the skin are coupled; a suction part into which the needle coupling part is inserted and which suctions air at a position coming into contact with the skin; and a temperature-regulating part which is formed on the front surface of the suction part and which regulates the temperature.

The invention provides an anesthesia auxiliary maintenance control system. The anesthesia auxiliary maintenance control system comprises a login module, a patient information input module, a management module, a patient vital sign acquisition module, a regulation and control switching module and an anesthetic injection condition module, the login module is used for completing user level-to-level management, a login self-checking function and a login recovery function; the patient information input module is used for inputting basic information of a patient and setting target data adjustment points of the patient, and the target data adjustment points comprise a blood oxygen adjustment point and a blood pressure adjustment point; the regulation and control switching module is used for realizing switching between manual regulation and control and automatic regulation and control; the management module is used for querying, displaying, modifying and storing historical operation records and realizing user management; the anesthetic injection condition module is used for setting and collecting the channel infusion speed.

1. The name of this design product: two-color prefilled syringe. 2. Purpose of this design product: for drug injection. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

This invention relates to the field of infusion rate control technology, specifically to an adaptive adjustment method for intraoperative anesthetic drug infusion rate based on reinforcement learning. The method includes the following steps: monitoring tubing pressure waveforms to extract hysteresis response features; constructing a multidimensional fluid environment state vector by splicing anesthesia depth errors; inputting the vector into a neural network to map and output a composite command containing a base flow rate and resistance torque; establishing a corrected drive signal by superimposing acceleration pulses based on tubing stiffness and compensating for flow leakage; and completing closed-loop verification based on pressure change rate deviation. In this invention, by analyzing the establishment and attenuation features of the pressure waveform to reconstruct the hysteresis response state of the physical environment, tubing compliance is incorporated into the network input space and mapped to generate a composite command containing a base flow rate and resistance torque. This eliminates drug delivery delays caused by tubing expansion and energy absorption, ensuring that motor actions are instantly converted into effective drug injection, thereby improving the real-time response speed and drug delivery control accuracy of anesthesia depth regulation.

The utility model discloses a novel dry and wet fascia release needle which comprises a plastic handle, a rubber plug hole, a rubber plug, a hollow steel needle mounting hole, a hollow steel needle, a plastic soft sleeve, a second cone, a long strip, a hollow steel needle outer sleeve hose, a plastic hard sleeve, a long-strip-shaped protrusion and a long inserting groove. Due to the adoption of the cylindrical plastic handle, the operation is smoother, the prying and loosening effects are better, and the hollow steel needle has a medicine injection function; the plastic soft sleeve is adopted, discomfort of a patient during catheter remaining can be reduced, the long strip facilitates fixing of the adhesive tape remaining catheter more firmly, the tail of the plastic soft sleeve can be connected with an injector for medicine injection and can also be connected with a rubber plug, and the infection opportunity during catheter remaining is reduced; the rubber plug is used for preventing medicine from leaking, and infection opportunities during tube reserving are reduced. The product can be used for effectively prying, stirring and releasing and injecting medicines to prevent fascia adhesion and aseptic inflammation, so that the pain symptom of a patient with the myofascia syndrome can be improved to the greatest extent.

The application discloses a real-time processing method for missing data of a regional radiation monitor, and relates to the technical field of data processing. The method comprises the following steps: acquiring in-door radiation sequence data and out-door radiation sequence data generated in the operation process of the regional radiation monitor in a historical time period; determining a drug injection time based on fluctuation characteristics of the in-door radiation sequence data; determining an out-door performance time based on a time correspondence relationship between the drug injection time, the in-door radiation sequence data and the out-door radiation sequence data; comparing a plurality of suspected out-door performance times before a current time with the out-door performance time in the historical time period to obtain a real probability of the suspected out-door performance time; judging a radiation fluctuation completeness degree of the in-door radiation sequence data processed by a linear interpolation method based on the real probability; and generating a required data compensation measure based on the radiation fluctuation completeness degree. The application achieves the technical effect of improving the judgment accuracy of abnormal radiation events.

The utility model discloses a single medicine injection liquid's paper support device, both sides of the support mechanism all are provided with first folding section, and the first folding section is 90 degrees bending to the inside of support mechanism, the below of first folding section is provided with second folding section, the second folding section is 90 degrees bending to the inside of support mechanism, the second folding section is located the side away from first folding section and is provided with third folding section, the third folding section is 120 degrees bending to the outside of support mechanism, the top of third folding section is provided with bonding section, the outer surface of bonding section and first folding section are fixed with glue bonding, first folding section, second folding section, third folding section and bonding section are all integrated, and the support mechanism for placing medicine injection liquid bottle takes three layers of corrugated paper as raw material, compared with the traditional material such as plastic bracket, foam, the packaging material cost is reduced greatly, and the corrugated paper is easy to obtain, and the price is low, is favorable to large -scale popularization and application.

The present invention relates to a fluid backflow prevention valve having a fluid channel inside a three-dimensional shape. The fluid backflow prevention valve comprises: a main fluid channel (130) in which an inlet (110) and an outlet (120) communicate with each other; a bypass island (140) formed to be spaced apart from the main fluid channel (130); and a branch fluid channel (150) branched from a start point (151) provided on one side of the rear side of a route of the main fluid channel (130), bypassing the bypass island (140), and then connected to an end point (152) provided on the other side of the front side of the route of the main fluid channel (130) in a direction opposite to the fluid movement direction of the main fluid channel (130), wherein a fluid channel round extension part (160) provided to extend roundly to have a preconfigured radius (R) toward the outside of the fluid channel from the start point (151) is further provided.

The invention belongs to the technical field of punching and pesticide injection devices, particularly relates to a punching and pesticide injection device and a punching and pesticide injection method for fruit tree pest control, and provides the following scheme for solving the problem that when an existing device injects and drills a hole, the hole is easy to deviate due to trunk shaking and unstable holding, the punching and pesticide injection device comprises a pesticide injection shell, and a pressing cover is arranged above the pesticide injection shell; the extrusion rod is arranged in the medicine injection shell, and the top end of the extrusion rod is fixedly connected to the inner wall of the top end of the extrusion cover; the connecting frame is arranged in the medicine injection shell, and the top end of the connecting frame is fixedly connected to the bottom end of the extrusion rod; the driving motor is arranged in the explosive injection shell, and a power output shaft of the driving motor is connected with a hollow drill rod through a coupler; provided is a trunk drilling stabilizing assembly. According to the punching and pesticide injection device and method for fruit tree disease and pest control, the flexible pad is attached to the trunk, the counter-acting force of drilling is counteracted, the trunk and the device are prevented from deviating, the drilling position is accurate, the pesticide injection effect is prevented from being affected by hole position deviation, and the fruit tree disease and pest control operation quality is guaranteed.

The invention discloses a needleless injection device for tumor drug injection and an injection method of the needleless injection device. The needleless injection device comprises an injection mechanism and an atomization mechanism arranged below the injection mechanism. The injection mechanism comprises an outer shell, a pushing assembly arranged on the inner side of the outer shell and a plurality of power sources arranged at the bottom of the outer shell. The power source is mainly used for providing power for the device. The pushing assembly is mainly used for pushing high-speed injection of medicine. The atomization mechanism comprises a medicine kettle, an atomization piece fixedly connected to the interior of the medicine kettle and a negative pressure piece arranged on one side of the atomization piece. The medicine pot is in threaded connection with the bottom of the outer shell, the negative-pressure part is arranged on the atomization part, and the bottom of the negative-pressure part is fixedly connected with a micromotor; therefore, the safety, the convenience and the comfort degree of medicine delivery are improved.

This invention provides a chemotherapy catheter for spinal tuberculosis, comprising a catheter with a drug channel, a flexible tube at the front end of the catheter with multiple through holes communicating with the drug channel, and a built-in one-way structure. The one-way structure includes an elastic rubber sheet at one end fixed to the inner wall of the drug channel; multiple elastic rubber sheets are stacked together in a conical shape; and a connector is connected to the rear end of the catheter, with a drug injection end for injecting medication. This invention, by inserting the catheter into the patient's body, injects medication through the drug injection end, which then passes through the drug channel and the one-way structure to prevent backflow, and finally flows out through the multiple through holes, thereby widely dispersing the medication and improving drug utilization.

The invention relates to an injector adapter, an injection assembly and a using method. The injector adapter comprises a connecting piece, and a cavity is formed in the connecting piece; the guide pipe penetrates through the connecting piece and penetrates through the cavity, and the pipe wall, located in the cavity, of the guide pipe is provided with a penetrating channel; the elastic sheath is located in the cavity, the elastic sheath is arranged outside the catheter in a sleeving mode, a potential gap cavity is formed between the elastic sheath and the catheter, and the potential gap cavity is in fluid communication with the catheter through the penetrating channel. The injector adapter can be used in cooperation with an existing injector, so that an operator can more visually judge whether a needle head penetrates through the sclera to reach the suprachoroidal space or not so as to guide the operator to conduct medicine injection, and the injection convenience of the operator is remarkably improved.

The present invention relates to a handpiece for injecting a drug, which can reduce pain and improve hemostatic effect while cooling or heating the surface of the skin by passing cold air and hot air through the inside of a compound needle that is in contact with the skin, and specifically, comprises: a compound needle that is coupled to a drug syringe that stores a drug and that is inserted into the skin, medicine is permeated for operation; the body is used for fixing the compound needle and the medicine injector and adjusting the injection amount of the medicine and the temperature of the compound needle; the medicine injection device is formed in the body, and the injection amount of medicine is adjusted by adjusting the pressure of a medicine injector; and the temperature adjusting device is formed at the lower part of the medicine injection device, is connected with the compound needle and is used for adjusting the temperature.

The invention discloses a pesticide injection device for pine nematode disease prevention and control, and relates to the technical field of pine nematode disease prevention and control, the pesticide injection device comprises a supply box, a drilling machine, a measuring rod and a drilling rod, the drilling machine is connected with a wire, the other end of the wire is connected with the supply box, a battery is installed in the supply box, and pesticide is stored in the supply box; a mounting box is fixedly connected to the upper end of the end, away from the drilling machine, of the base, a driving mechanism and a medicine supply mechanism are arranged in the mounting box, a sliding groove is formed in the side wall of the end, away from the drilling machine, of the mounting box, one measuring rod is fixedly connected with the mounting box, the other measuring rod is fixedly connected with a sliding block, the sliding block is in sliding connection with the sliding groove, and the drill rod is slidably sleeved with an indicating rod. The pine tree pesticide injection device has the advantages that pesticide injection can be directly conducted on pine trees after punching is conducted, the pesticide injection efficiency is remarkably improved, the punching depth and the pesticide injection amount can be accurately controlled according to pine trees with different diameters, and the control effect on the pine tree nematode disease is improved.

The invention discloses a lateral recess puncture remaining needle, and relates to the technical field of medical instruments, the lateral recess puncture remaining needle comprises a matching part, an abutting part and a control part, a pulsator is shifted by fingers, the pulsator can only rotate for half a circle under single control due to the fact that only the part of the pulsator on the outer side of a control frame can be shifted, and the pulsator can only rotate for half a circle due to the fact that the screw pitch of a screw is 2 mm. The screw rod is limited by the fixing plate in the square groove of the limiting column, the screw rod cannot rotate, finally, the screw rod moves upwards by 1 mm, the abutting ring moves upwards by 1 mm under the clamping connection of the sliding teeth and the fixing teeth, the pushing space of an indwelling needle by an operator is only 1 mm, puncture safety is guaranteed, and after back suction and pushing injection are not subjected to resistance any more, the screw rod cannot rotate, and the screw rod cannot move upwards by 1 mm. And medicine injection is carried out through the lateral recess puncture remaining needle.

This invention provides a thrombolytic catheter system for cerebral venous sinus, relating to the field of medical device technology. It includes a microcatheter and a blocking guidewire. The microcatheter has a drug injection structure and side holes. The side holes have several through-holes distributed circumferentially and axially. The blocking guidewire includes a guidewire body and a blocking portion connected to the guidewire body. By using the microcatheter and blocking guidewire, during use, the blocking guidewire is inserted into the microcatheter, and the blocking portion at the end of the guidewire seals the end of the catheter. Thus, during thrombolytic drug injection, the drug only flows out from the through-holes of the catheter. Multiple through-holes are provided circumferentially and axially. This closed design, where thrombolytic drug flows only from the side holes, increases the contact area between the thrombolytic drug and the thrombus, thereby increasing the probability of vascular patency and reducing catheterization time. This solves problems related to the difficulty of removing cerebral venous sinus thrombi, venous reflux during catheter-based thrombolysis, and intracranial infection.

The embodiment of the present application relates to a reciprocating cycle driven medicine injection device, which mainly comprises the following structure: a swing module comprising two first guide rails, two swing arms, a connecting arm and a base; two push modules respectively sleeved on the two first guide rails and capable of moving along the axial direction of the first guide rails; the push module comprises a first push piece and a second push piece; a rotating module comprising a group wheel and an outer screw; a one-way stop module connected with the group wheel and used for controlling the one-way rotation of the group wheel; a limiting module used for limiting the swing arm; an inner screw arranged in the outer screw; a piston fixedly connected with the top end of the inner screw; and a medicine tank used for loading medicine liquid.The present application adopts a double-swing-arm and double-screw structure, has high stability, compact structure and small volume, and is convenient to carry; through the double-ratchet-wheel arrangement, the precise injection of the medicine dose can be realized, and the user can inject different doses of medicine liquid according to the requirement, so as to meet the requirement of users with different doses.

Briefly, an injection delivery system is described for subcutaneous or intramuscular injection of a drug, in particular a large volume of a biologic drug, high and low viscosity biologies, or a large volume of a high viscosity and low viscosity chemical drug. The injections may be self-administered or performed by a caregiver. The system uses a pump to move a drug from a vial, thorough an infusion set, and into the patient. A vial of a biological or chemical drug is set into a vial adapter that is associated with the pump, which can be manual or powered. A fluidics subassembly connects the vial adapter, pump, and the infusion set so that a drug pathway is enabled from the vial to the patient. The fluidics subassembly has one or more check valves to assure that the drug pathway is only enabled for a one-way drug flow out of the vial and to the patient. The infusion set has flexible tubing that connects the fluidics subassembly to cannula assembly inside an infuser housing. The cannula assembly has an air evacuation assembly near the tip of the needle. This air evacuation assembly is constructed to safely exhaust air from the cannula assembly at three times: (1) at initial setup to exhaust air while the drug is filling the cannula assembly, which enables the self-priming; (2) during injection to exhaust drug-entrapped air, which increases injection safety; and (3) at the end of drug delivery to exhaust air after the full dose of drug has been delivered to the cannula assembly, including drug that was in the tubing, which reduces wasted drug and minimizes the amount of drug overfill required in the vial.

The present invention relates to a hemostatic balloon catheter system, comprising a first tube, a second tube, a balloon, and a support member, wherein a lumen is formed between the first and second tubes; the balloon is eccentrically arranged at the distal end of the second tube and forms a channel with two open ends between the balloon and the distal end, the balloon having a balloon cavity connected to the lumen and a plurality of drug injection paths on its upper surface; the support member is arranged in the channel and has a supporting state of arching outward and an initial state of resetting inward, when the support member is in the supporting state, the support member drives the balloon to arch outward, one end of the support member is movably arranged on the second tube and can slide controllably relative to the second tube so that the support member can switch between the initial state and the supporting state. The system drives the balloon to arch outward through the support member, so that the balloon can contact the damaged part of the blood vessel, and can achieve precise penetration of the drug, while ensuring the normal circulation of blood during the hemostasis process, reducing the risk of postoperative complications.

The invention relates to the technical field of medical monitoring information processing, in particular to a controlled medicine injection monitoring system and armlet, and the system comprises a controlled medicine injection monitoring armlet and a cloud processing module; the control drug injection monitoring armlet comprises a monitoring module, an information transmission module and a drug injection module, the monitoring module is used for collecting vital sign information of a user; the cloud processing module is used for constructing a deep learning model and determining a corresponding pain level; and the drug injection module performs estimation according to a pharmacokinetic model and a pain level through an extended unscented Kalman filter system, establishes a control model for optimization to determine a minimum-cost drug injection real-time scheme and dynamically performs drug injection. According to the method, automatic analysis of the pain condition of the user is achieved through a multi-modal analysis method, the medication scheme is dynamically adjusted in real time according to the state of the user in the injection process, and personalized analgesia optimization within the safety boundary is achieved.

The invention discloses a device and method for medicine injection of a suprachoroidal space, and relates to the technical field of medical instruments.The device for medicine injection of the suprachoroidal space comprises an injector shell; the injection cylinder is arranged in the injector shell in a penetrating mode, a needle head is fixedly arranged at the end, located in the injector shell, of the injection cylinder, and an injection piston is arranged at the other end of the injection cylinder in a penetrating mode. The tail end of the needle head can penetrate through the end, away from the injection piston, of the injector shell, and a pressure measuring device is arranged on the needle head. The linkage device can be switched to fix the injector shell and the injection cylinder or fix the injection cylinder and the injection piston; and the signal conversion module is in signal connection with the pressure measuring device and the linkage device, and can control the switching action of the linkage device according to the pressure signal at the needle head measured by the pressure measuring device. According to the device and the method for suprachoroidal cavity medicine injection, the suprachoroidal cavity part can be accurately positioned.

This invention relates to the field of auto-injector technology and discloses a fully automatic intelligent high-pressure needleless injector, comprising a main body, a needleless injection head detachably mounted on the injection end of the main body, a gripping drive assembly disposed in the middle of the inner cavity of the main body, and an impact assembly connected to the gripping drive assembly disposed in the inner cavity of the main body at the end away from the needleless injection head, and a charging assembly disposed on the inner cavity and outer end of the main body on the same side as the impact assembly; the invention, by providing a gripping drive assembly and an impact assembly, facilitates users to set the required drug injection volume and injection pressure parameters via a mobile APP, and transmits the information to the injector's control module via Bluetooth communication. The control module analyzes the received injection volume and injection pressure parameters and realizes an intelligent integrated control process for automatic drug replenishment and automatic injection of the needleless injector, improving the control capability of drug injection dosage and force.

A prostate dilator belongs to the technical field of medical instruments and comprises a catheter, the front end of an imbedding end of the catheter is a hemispherical guide head, and a plurality of lubricant injection holes are formed in the periphery of the central point of the catheter; a medicament injection hole is formed in the catheter behind the guide head; a gas inlet and outlet hole is formed in the catheter of the air bag section, a lubricant tube, a medicament tube and an inflation tube are arranged in the catheter, the lubricant tube is communicated with the lubricant injection holes, the medicament tube is communicated with the medicament injection holes, and the inflation tube is communicated with the gas inlet and outlet hole; the lubricant tube, the medicament tube and the inflating tube respectively extend out of the tail part of the operation end and are respectively connected with an injector; the prostate dilator has the advantages that when the prostate dilator is propelled, lubricant can be injected while the prostate dilator is propelled, the air bag skin can be tightly attached to the sunken air bag section through the sunken portion, friction of the catheter to the inner wall of a prostate can be effectively reduced on the whole, and discomfort of a patient is relieved.