49 results about "Catheter indwelling" patented technology

Indwelling catheter having an upper distal end having a portion that can expand within a bladder type spaces without having to be inflated. An embodiment allows for at least one slit on an upper side of the catheter tube and a head member that when pulled down by a stylette moving inside the catheter causes a bulge wing portion(s) that holds the catheter safely and painlessly within the bladder. Magnetic and electret valves can be included inside the tube of the catheter that can cycle between open and closed positions when activated by normal bladder pressure when urination is desired. The novel catheter tube can naturally conform to an opening and closing urethra during natural bladder drainage. The catheter tube surface can include an anti-microbial layer that is either or both coated and impregnated thereon with either an antibacterial and / or hydrophyllic materials. Sampling ports can be located on both inside catheter tube valves and on an externally attached magnetic valve.

The invention relates to a method for establishing a rat external carotid artery catheter-indwelled cerebral ischemia reperfusion model. The method includes the following steps that: the direction of an external carotid artery blood vessel of a rat is drifted, the direction of the external carotid artery blood vessel of the rat is drifted to a position which is consistent with or parallel to the direction of an internal carotid artery blood vessel of the rat; the external carotid artery blood vessel is cut, a suture is inserted into an incision, so that cerebral ischemia can be formed in the neck of the rat; and 1 to 2 hours after the suture is inserted into the incision, and cerebral ischemia is formed, the suture is pulled out, and a catheter injection bag through which medicine can be injected repeatedly is arranged into the external carotid artery blood vessel. According to the method, an external carotid artery suture method is adopted to manufacture the rat ischemia reperfusion model, and therefore, the normal structures of an operation-side common carotid artery and an internal carotid artery can be protected; the catheter injection bag through which medicine can be injected repeatedly is indwelled in the external carotid artery, medicine can be injected into the internal carotid artery through the artery catheter repeatedly at different time points; nerve functional assessment after the model is established can be realized, and qualified animals could be accepted and subjected to experimental intervention, and therefore, the scientific nature of experiments can be greatly improved.

The invention discloses a trachea cannula capable of monitoring air bag pressure automatically. The trachea cannula is made of antibacterial materials integrally. The tip portion of a patient end of the trachea cannula is formed by flexible body materials, namely soft PVC (polyvinyl chloride), a thin-film pressure sensor is mounted on the inner wall of an inflatable cuff, an air bag pressure monitor is connected to an inflating tube through a three-way tube, a Bluetooth module is mounted in each of the thin-film pressure sensor and the air bag pressure monitor, and the thin-film pressure sensor and the air bag pressure monitor are wirelessly communicated with a mobile terminal through the Bluetooth modules. The trachea cannula capable of monitoring the air bag pressure automatically has the advantages that the tip portion is made of the soft PVC material coated with antibacterial coatings internally and externally, so that inappropriate compression of the patient end on tissues of a human body is avoided during use of the trachea cannula, damage to human organ mucosae is reduced, and related infectious complications during tracheal catheter indwelling can be reduced; since the thin-film pressure sensor and the air bag pressure monitor are used for detecting the air bag pressure in real time, use safety is improved; the mobile terminal can obtain pressure detection data in real time.

The invention discloses a weak-irritation triple-aspiration-prevention laryngeal mask which can be put into the gastrointestinal tract through the nose. The weak-irritation triple-aspiration-prevention laryngeal mask comprises a laryngeal mask body, a laryngeal mask bag, a bite block, an air duct, an air duct interface, an air duct opening, a suction tube, a suction tube opening, a tongue central fovea, a uvula fovea and a catheter groove, wherein the bite block is arranged above the laryngeal mask body, the laryngeal mask bag is arranged under the laryngeal mask body, the air duct interface is formed above the bite block, the back face of the upper-middle section of the laryngeal mask body is provided with the uvula fovea, the uvula fovea naturally extends along the back face of the laryngeal mask bag to form the catheter groove, the tongue central fovea is formed in the center of the front face of the laryngeal mask body, the air duct opening is formed in the laryngeal mask bag, the suction tube opening is formed in the lateral rear side of the tail end of the catheter groove, and the suction tube penetrates into the upper portion of the laryngeal mask body and descends to the suction tube opening through the laryngeal mask body. The weak-irritation triple-aspiration-prevention laryngeal mask is ingenious in structure and decreases the irritation of the laryngeal mask to the pharynx oralis and facilitates catheter indwelling and suction by being provided with the tongue central fovea, the uvula fovea and the catheter groove.

The invention discloses an oval diversion safe indwelling needle. The indwelling needle comprises a sleeve base with a handle, a puncture steel needle, a sleeve, an extension pipe and a liquid injection connector. The two ends of the extension pipe are connected with the sleeve base and the liquid injection connector respectively. The liquid injection connector comprises a liquid injection connector body, a needle-free connector and a disinfection protective cap, wherein the needle-free connector and the disinfection protective cap are arranged on the liquid injection connector body, and the liquid injection connector body is connected with the extension pipe; the needle-free connector is used for receiving a syringe needle device used for infusion or is connected with a liquid medicine flow-out guiding pipe of an infusion container; the disinfection protective cap is placed on the needle-free connector and is a disinfection protective cap with 2% chlorhexidine; the puncture steel needle and the sleeve are arranged on the sleeve base, and the puncture steel needle is wrapped by the sleeve; a funnel part is arranged on the sleeve base, and the sleeve and the puncture steel needle are arranged on the funnel part of the sleeve base; a blood returning window is arranged on the sleeve base, and the cross section of the puncture steel needle is oval. The oval structure can reduce puncture injuries, occurrence of phlebitis is avoided, and the catheter indwelling success rate of the indwelling needle is increased.

The invention discloses a visible arteriopuncture catheter indwelling device, belonging to the field of medical equipment. The device consists of a four-dimensional color Doppler ultrasound machine, a semi-cylindrical Doppler detector, a handheld automatic puncture catheter indwelling device, a head-mounted augmented reality device and a main controller, wherein the semi-cylindrical Doppler detector is connected with the four-dimensional color Doppler ultrasound machine through a circuit; and the head-mounted augmented reality device, the handheld automatic puncture catheter indwelling device and the four-dimensional color Doppler ultrasound machine are connected with the main controller. By adopting the device, a doctor can easily find the best puncture point of artery, the puncture process of the doctor is simplified, the efficiency of the whole puncture catheter indwelling process is improved, and the pain of a patient is relieved.

The invention relates to a peripheral venous catheter and a use method thereof, and belongs to the technical field of medical apparatus and instruments. The peripheral venous catheter comprises an action portion and a locking portion which are connected with each other. The action portion sequentially comprises a puncture needle, an expander and a catheter body which are connected in a sleeved mode from inside to outside. The locking portion is arranged at the tail end of the expander and comprises a first locking device and second locking devices. The first locking device comprises a first locking part and a second locking part which are matched with each other, the second locking devices are arranged in pair, one end of each second locking device is provided with a first clamping part and a first limiting block, and the other end of each second locking device is provided with a second clamping part and a second limiting block. The peripheral venous catheter and the use method thereof have the advantages that the operation process is simplified, the success rate of catheter indwelling is increased, the work efficiency is effectively improved, injuries of an operator are prevented, puncture wound surfaces are reduced, and the structure is simple.

The invention provides an ultrasonic equipment display device and related method, and the ultrasonic equipment display device and related method are used for automatically determining the depth of a vessel to be punctured and recommending appropriate catheter sizes. According to the technical scheme, the ultrasonic equipment display device comprises a display unit, the display unit is used for displaying an ultrasonic image comprising a target vessel, a circular reference substance adjustable in size, and a horizontal marking line for marking the depth position of the circular reference substance, the circular reference substance is located at the upper layer of the ultrasonic image all the time and can move, and the horizontal marking line passes through the center of the circular reference substance. By means of implementation of the scheme, it can be avoided that personal experience of an operator is excessively depended on in the puncture and catheter indwelling process, and consequently the universality and implementation efficiency of the puncture and catheter indwelling technology are improved.

The invention discloses a VA-ECMO femoral artery cannula providing lower limb blood perfusion and a catheter indwelling method. The cannula comprises a cannula body and a puncture guide core, a main cavity and a side cavity which are independent of each other are formed in the cannula body, the main cavity is of a front-back through structure, a main cavity side hole is formed in the outer side of the front end of the main cavity, the side cavity wraps the periphery of the rear end of the main cavity, a side cavity side hole is formed in the outer side of the side cavity along a same front-back straight line, an annular air bag is arranged at the position, between the main cavity side hole and the side cavity side hole, of the cannula body, and a bulging air bag is arranged at the rear end extension line position of the side cavity side hole; the annular air bag and the bulging air bag are both connected with air bag openings used for inflation and deflation. According to the invention, the structure of the femoral artery cannula is improved, lower limb blood perfusion can be met through one-time cannula indwelling, the occurrence rate of lower limb ischemia complications is effectively reduced, the operation is convenient, and the surgical risk, complexity and trauma to patients are reduced.

The invention discloses a trachea cannula capable of monitoring air bag pressure automatically. The trachea cannula is made of antibacterial materials integrally. The tip portion of a patient end of the trachea cannula is formed by flexible body materials, namely soft PVC (polyvinyl chloride), a thin-film pressure sensor is mounted on the inner wall of an inflatable cuff, an air bag pressure monitor is connected to an inflating tube through a three-way tube, a Bluetooth module is mounted in each of the thin-film pressure sensor and the air bag pressure monitor, and the thin-film pressure sensor and the air bag pressure monitor are wirelessly communicated with a mobile terminal through the Bluetooth modules. The trachea cannula capable of monitoring the air bag pressure automatically has the advantages that the tip portion is made of the soft PVC material coated with antibacterial coatings internally and externally, so that inappropriate compression of the patient end on tissues of a human body is avoided during use of the trachea cannula, damage to human organ mucosae is reduced, and related infectious complications during tracheal catheter indwelling can be reduced; since the thin-film pressure sensor and the air bag pressure monitor are used for detecting the air bag pressure in real time, use safety is improved; the mobile terminal can obtain pressure detection data in real time.

An intravenous catheter setter capable of drawing and detecting backflow blood mainly comprises a drawing and detecting unit with a suction effect and a needle assembly. The needle assembly is provided with a needle, a catheter seat and a flexible catheter, wherein the needle is communicated with the drawing and detecting unit, the catheter seat is detachably connected with the drawing and detecting unit, the flexible catheter is connected with the catheter seat, the needle penetrates out of the flexible catheter, accordingly the drawing and detecting unit can draw, detect and display backflow blood in a blood vessel, and after the needle is extracted away from the catheter, the flexible catheter is remained the blood vessel. In addition, the intravenous catheter setter capable of drawing and detecting backflow blood comprises a tube and a needle extracting-back unit capable of backwards extracting the needle so that the needle is hidden in the tube, and accordingly service safety is improved.

The invention discloses a visual drainage tube assembly. The visual drainage tube assembly comprises a visual tube head, a tube body and an endoscope. The visible tube head is made of a material withthe light transmittance of not less than 80%. The tube body is provided with a head end and a tail end in the length direction, the head end of the tube body is connected to the visible tube head, anda drainage opening communicated with the interior of the tube body is formed in the side wall of the tail end of the tube body. The endoscope is located inside the head end of the tube body. The tubebody does not hinder the imaging of the endoscope; a certain protection effect can be achieved on the endoscope; the puncture catheterization process is as convenient and visual as an endoscopic surgery; blind penetration in the catheter indwelling process can be avoided, dependence on experience of clinicians is reduced, an expected drainage position can be achieved under the condition of extremely small damage, meanwhile, the unnecessary trouble of directly using the endoscope for catheter indwelling again can be avoided, secondary damage can be avoided, and catheter indwelling efficiency can be improved.

The invention provides a medical catheter indwelling device, and belongs to the field of manufacturing of medical supplies. The device comprises a shell, a puncture needle, a guide wire and a catheter, the puncture needle is fixed in the shell and extends out of the puncture end; the guide wire is slidably located in the puncture needle, and the catheter is arranged on the outer side of the puncture needle in a sleeving mode. A slidable push button is arranged on the shell, and the tail part of the guide wire is fixed on the push button; the push button slides towards the puncture end relative to the shell, so that the guide wire slides out towards the puncture end along the puncture needle; a slidable push rod is further installed on the shell, and the guide pipe is clamped on the push rod. The push rod slides towards the puncture end relative to the shell, so that the catheter slides to the guide wire from the puncture needle. The puncture needle is fixed to the shell, the guide wire is inserted into the guide wire through the slidable push button, the catheter slides to the embedded guide wire from the puncture needle through the push rod, and therefore the placement work of the catheter is completed; the guide wire, the catheter and the puncture needle are effectively integrated on the same shell, the two hands are liberated to the maximum extent, and therefore operation is easier and more convenient.

This invention provides a modified catheter / indwelling device biomaterial that provides both immediate, and long-term microbiocidal effects on otherwise antibiotic-resistant strains of microorganisms. The material, which exhibits good mechanical performance characteristics for medical devices, is composed of a hydrophobic polyurethane (PU), a hydrophilic polyethylene vinyl acetate (PEVA) as an option, a soluble silver salt and a sparsely-soluble silver salt. The hydrophobic polyurethane provides the good physical properties, the PEVA the hydrophilicity necessary to allow some water ingress into the catheter, the soluble silver salt for an immediate burst effect, and the sparsely-soluble silver salt for sustained-release over many months postimplantation. Alternatively, the sparsely soluble silver salt can be silver iodate and is combined with silver sulfadiazine. Chlorhexidine can also be included in the material.

The invention discloses a multifunctional urethra bougie, particularly discloses a multifunctional urethra bougie for the acute uroschesis disease, and belongs to the technical field of medical instrument design and manufacturing. By means of the multifunctional urethra bougie for the acute uroschesis disease, the urethra can be successfully expanded, urination can be successfully carried out, and catheter indwelling can be assisted. The multifunctional urethra bougie comprises a urethra bougie body, and a guide indwelling structure extending in the length direction of the urethra bougie body is arranged on the urethra bougie body.

The invention relates to a newborn multifunctional safety type lumbar puncture catheter needle with scales, and belongs to the field of medical apparatuses and instruments. The lumbar puncture catheter needle comprises a central steel needle core and an outer side hollow hose catheter needle; the total length of a puncture needle is 4 cm, the length of the front needle body is 3.0 cm, and the length of butterfly-shaped both wings of the tail end is 1 cm. The total length of the central steel needle core part is 4.2 cm, puncturing is facilitated due to the sharp needle tip, and the central steel needle core is 0.2 cm longer than the front end of the outer side hollow hose catheter needle. The needle tip end is provided with a round blunt slope and slants to the steel needle core, the outerside hose catheter needle is matched with the inner side steel needle core, and the handle end of the outer side hose catheter needle is matched with a thread of the inner side of the handle end of the steel needle core. The needle can easily puncture into skin and subcutaneous tissue, tissue damage is not easily caused, and the infection probability caused by repeated puncture damage and repeatedpuncture is lowered. The newborn multifunctional safety type lumbar puncture catheter needle can be used as a puncture sheathing canal needle during continuous cerebrospinal fluid drainage of a lumbar puncture indwelling catheter; due to the tearable design, after the catheter indwells successfully, the outer catheter needle can be torn off gradually along the butterfly-shaped both wings.

The invention provides medicinal composition with the functions of functions of clearing away heat, removing dampness and killing parasites to relieve itching. The medicinal composition is prepared from the following crude drugs in parts by weight: 96 to 156 parts by weight of radix sophorae flavescentis, 96 to 156 parts by weight of cortex phellodendri, 110 to 190 parts by weight of fructus cnidii, 110 to 190 parts by weight of cortex dictamni and 0.8 to 1.2 parts by volume of peppermint oil. The invention also provides a preparation method and application of the composition. According to the composition provided by the invention, all the components are reasonably matched; the composition can be used for treating inflammation of perineum pruritus and eczema, or catheter indwelling patients and perineal care of obstetric and gynecological patients, and has a good clinical application prospect.

The invention discloses patient trousers for patients with catheter indwelling, which comprise a trouser body, and the trouser body is provided with a passing opening and a urine bag storage bag positioned on one trouser leg; wherein the trouser leg with the urine bag storage bag is provided with a catheter storage bag, an inner cavity of the catheter storage bag is divided into two pipe cavities with openings through a separation piece, and catheters can penetrate through a plurality of different positions in the direction from the openings of the pipe cavities to the bottoms of the pipe cavities from the separation piece. According to the trousers, the bent left part and the bent right part of the catheter can be separately stored through the two pipe cavities of the catheter storage bag, so that the catheter can be effectively prevented from being hung outside the trousers body, the catheter penetrates through different positions of the separation piece, the stored lengths of the catheter are different, flexible adjustment can be conducted according to the actual use condition, and the applicability is good.

The invention discloses a multifunctional air bag type anal tube which comprises an anal tube body, an air bag, an air conveying pipe and a valve. The anal tube body penetrates into the air bag and is tightly attached to the two ends of the air bag. Two symmetric sides between the inner wall and the outer wall of the anal tube body are each provided with an anal tube wall tunnel. Two small holes are formed in the positions, corresponding to the outer wall of the anal tube body, of each anal tube wall tunnel, and serve as the first tunnel opening and the second tunnel opening respectively. The second tunnel openings are formed in the air bag, and the first tunnel openings are formed outside the air bag. The first tunnel openings are connected with one end of the air conveying pipe. The other end of the air conveying pipe is connected with one end of the valve. The other end of the valve is connected with a syringe. By means of the multifunctional air bag type anal tube, effective compression hemostasis is carried out on an inner wound surface of the anus of a patient after an operation, and cold normal saline is injected into the air bag, so that anal temperature is lowered and anal pain after the operation is relieved. Accordingly, the probability of urination difficulty caused by the anal pain is reduced, the probability of catheter indwelling is lowered, and therefore the probability of urinary tract infection is reduced.

The invention provides a nanometer double-resisting deep venous catheter. The deep venous catheter is characterized by comprising a deep venous catheter body; wherein the deep venous catheter body is composed of a deep venous catheter main body, a deep venous catheter outer sustained-release layer and a deep venous catheter inner sustained-release layer; the deep venous catheter main body is provided with a through pipeline; the deep venous catheter outer sustained-release layer is located on the outer surface of the deep venous catheter main body; the deep venous catheter inner sustained-release layer is located on the inner surface of the deep venous catheter main body; the deep venous catheter outer sustained-release layer is used for slowly releasing drugs with anti-infection and / or antithrombotic effects; and the deep venous catheter inner sustained-release layer is used for slowly releasing drugs with anti-infection and / or antithrombotic effects. The deep venous catheter can resist infection and thrombus, has dual functions, can prolong the catheter indwelling time, and can reduce the damage to the body of a patient by reducing the infection and thrombus formation of the patient.

The invention discloses a catheter indwelling patient fixing control assembly which comprises a control box, a plurality of adjusting belts are arranged on one side of the control box, fixing parts are arranged on the adjusting belts, a flow detection part is arranged on the control box, an opening and closing part is arranged below the flow detection part, a trouser body is arranged on the outer side of the control box, and a trouser pocket used for containing a urine bag is arranged on the inner side of the trouser body. The control box is fixed to the thigh of a patient through the adjusting belt and the fixing piece, the catheter penetrates through the flow detection piece and the opening and closing piece, the urine bag is placed on the inner side of the trousers body, the catheter and the urine bag are hidden in the trousers through the trousers body, and the privacy of the patient is protected; the urine volume is automatically measured and calculated through the flow detection piece, and the urine volume measuring process can be reduced; the catheter can be automatically or manually opened or closed at regular time through the opening and closing piece, the contraction function of the bladder is exercised, and the function of pulling out the catheter as soon as possible can be achieved.

The invention relates to the technical field of medical apparatus and instruments, in particular to a tracheal catheter indwelling depth detection device which comprises a pressure sensing part arranged on the catheter wall of a catheter main body, a pressure sensing part comprising a shell, an elastic conduction piece, and a detection piece connected with the elastic conduction piece, and a recording part in signal connection with the detection part; in the process that the catheter main body extends into the human trachea, the shell is always in contact with the inner wall of the human trachea under the elastic action of the elastic conduction piece, and the pressure, acting on the shell, of the inner wall of the human trachea can be transmitted to the detection piece through the elastic conduction piece and detected by the detection piece; and the recording part is used for recording the pressure fluctuation detected by the detection part. According to the tracheal catheter indwelling depth detection device, the indwelling depth of the tracheal catheter in the trachea of the human body can be objectively and accurately judged. The invention further provides a tracheal catheter.

The invention relates to a novel branched catheter indwelling drainage system. The novel branched catheter indwelling drainage system comprises a catheter; the left end of the catheter is provided with a suction catheter head; the suction catheter head is provided with suction holes; the right end of the catheter is provided with a flow diversion catheter connecting base; a flow inlet valve and a flow outlet valve are arranged on the flow diversion catheter connecting base respectively; a flow inlet catheter is connected with the flow inlet valve; a flow outlet catheter is connected with the flow outlet valve; a separating plate is arranged in the catheter so as to divide the inner part of the catheter into two parts, wherein one part is connected with the flow inlet catheter, and the other part is connected with the flow outlet catheter. Beneficial effects are that: the rear end of the catheter is provided with two independent branched parts, and the inner part of the catheter is divided into two parts, so that interference of liquid flows into the novel branched catheter indwelling drainage system and liquid flows out of the novel branched catheter indwelling drainage system is not caused, and operations such as medicine liquid washing and sampling test can be carried out without stopping drainage.

The invention relates to the technical field of medical instruments, and particularly discloses a medical puncture catheterization training dummy human which comprises a trunk, two arms are fixed to the two sides of the trunk, a power supply is fixed in the trunk, each arm comprises a supporting net rack, the supporting net racks are wrapped with human leather-simulated rubber sleeves, and the supporting net racks are fixed to the upper portion of the trunk. And at least one fixed vein blood vessel is fixed on the inner wall of the supporting net rack. The device has the beneficial effects that various combination modes can be selected according to requirements to simulate problems encountered in the PICC indwelling process and the indwelling period, and the conditions encountered by an operator in each training can be different from those encountered by the operator in the last training; through the cooperation of the ultrasonic detector and the display screen, a teacher can conveniently know the position of the catheter and the specific operation of an operator in the catheter indwelling process in real time, so that medical staff can conveniently carry out simulation practice and assessment on the PICC indwelling technology, and the mastering condition of the medical staff on the PICC indwelling technology can be assessed; and the mastering degree of medical personnel on the PICC catheterization technology is improved.

The invention belongs to the technical field of a medical instrument and belongs to an indwelling catheter trace slow-release transfusion device. According to the indwelling catheter trace slow-release transfusion device, a front joint, a positive pressure chamber and a back joint which are connected into a whole build a straight transfusion path and a slow-release path, wherein the straight transfusion path is used for normal transfusion, the slow-release path is used for realizing positive pressure slow-release transfusion by utilizing residual medicine liquid in a positive pressure chamber after a transfusion appliance is removed, in addition, the two transfusion paths are switched through a switching assembly, arranged in the positive pressure chamber, of the main body, the straight transfusion path is built when the transfusion appliance is connected with transfusion liquid, when the transfusion appliance is removed, the straight transfusion path is closed in a time delay way, and the slow-release path is switched and started to be used. On the basis, the residual medicine liquid realizes the slow transfusion through the arrangement of a slow-release valve for ensuring that an indwelling catheter maintains a positive pressure state for a long time, so the dual goals that the positive pressure pipe sealing is realized at the separation moment of the transfusion appliance, the indwelling catheter can effectively prevent blood from flowing back to the indwelling catheter for a long time and can effectively prevent the thrombus formation in the indwelling catheter indwelling period are reached.

The invention relates to a nasal catheter sticker. The nasal catheter sticker consists of a main body sticker and a left wing sticker and a right wing sticker which are respectively arranged on the two sides of the main body sticker, wherein the main body sticker, the left wing sticker and the right wing sticker form a Z-shaped structure, base layers of the main body sticker, the left wing sticker and the right wing sticker are made of polyurethane films which have slight irritation to skin, the upper surfaces of the left wing sticker and the right wing sticker are respectively and sequentially provided with a water absorbing pad and a medical pressure-sensitive adhesive layer I with the same shape as the left wing sticker and the right wing sticker, two arc-shaped elastic baffles which are arranged face to face are arranged on the upper surface of the base layer of the main body sticker, a groove for wrapping a nasal catheter inside is formed between the two arc-shaped elastic baffles, a medical pressure-sensitive adhesive layer II is arranged on the lower surface of the base layer of the main body sticker and release paper are stuck on the surfaces of the medical pressure-sensitive adhesive layer I and the medical pressure-sensitive adhesive layer II. The nasal catheter sticker has the advantages that the nasal catheter can be firmly fixed, the accidental falling rate of the nasal catheter of the patient is reduced and the psychological burden caused by catheter indwelling to the patient is effectively relieved.

The invention discloses a novel urethral stenosis expanding and catheter indwelling assisting device, which comprises a urethral probe, a zebra guide wire and a catheter puncture nail. The urethral probe is provided with a hollow cavity, the front end of the urethral probe is provided with an opening, the side wall of the front end of the urethral probe is provided with a side hole, and the rear end of the urethral probe is respectively provided with an independent guide wire imbedding tube and an independent liquid medicine injection tube; the axis of the guide wire imbedding tube is consistent with that of the urethra exploring tube, and the liquid medicine injection tube is located on one side of the guide wire imbedding tube; an expansion balloon is further arranged on the outer side wall of the front end of the urethra exploring tube and connected with a balloon communicating tube arranged in the hollow cavity, and the rear end of the balloon communicating tube extends out of theurethra exploring tube and expands to form an expansion balloon tube. The device is simple in structure, reasonable in design and easy and convenient to operate, urethra mucous membrane injuries caused by repeated urethra expansion are avoided, time is saved for clinicians, the operation difficulty is lowered, and pains and risks of patients are reduced.