156 results about "Urethral Catheters" patented technology

The present invention provides a urethral catheter 200 adapted for anastomosis following radical prostatectomy, comprising an inflated activating balloon 60 adapted for concurrently (i) pressing said-bladder neck 140 to saidurethra stub 120; (ii) effectively stretching suture 90; (iii) activating locks 80 that non-reversibly catch saidsutures 90; and (iv) cutting saiddistal portion thereof.

An intermittent urethra self-retaining catheter set 10 comprises a catheter unit 1, a disinfectant casing 2, and a cap 3. The catheter unit 1 includes a catheter body 11 having an urine-guiding passage 111 and a water-guiding passage 112 that extend along a longitudinal direction and are separated from each other, a balloon 12 attached to a distal end of the catheter body 11 in an inflatable manner and communicated to the water-guiding passage 112, an elastic plug 13 attached to an intermediate portion of the catheter body 11, a branched tube 14 branched from the catheter body 11 above the elastic plug 13 and communicated to the water-guiding passage 112, a reservoir 16 attached to a free end of the branched tube 14 in a collapsible manner for storing a sterilized water 15, an on-off valve 17 attached to an intermediate portion of the branched tube 14, and a reinforcement tube 18 inserted into an upper interior of the urine-guiding passage 111 in the catheter body 11. The disinfectant casing 2 is detachably fitted on the elastic plug in a sealing manner for containing a lower part of the catheter body 11 below the elastic plug 13 and for storing a disinfectant liquid 21. The cap 3 is detachably fitted on a top portion of the catheter body 11 for opening and closing an outlet port 311. The on-off valve 17 is adapted to open and close a passage in which the sterilized water 15 flows between the reservoir 16 and the balloon 12.

The invention provides a catheter with silicone rubber coating and a preparation method thereof. The catheter consists of a tube fork, a tube body and a ball membrane in sequence. The tube fork consists of a rubber fork and a hopper, one end of the rubber fork is jointed with the communication position of the hopper and the pipe body; the rubber fork, the hopper and the tube body form a Y shape; one end of the tube body which is far from the hopper is equipped with a liquid outlet, and the tube body is equipped with a saccule part which is positioned between the liquid outlet and the hopper and is adjacent to the tube body of the liquid outlet. The saccule part is equipped with an aerating hole, and the ball membrane is sheathed on the aerating hole of the saccule; the outer surface of the tube body of the catheter is coated by the silicone rubber coating. The surface of the catheter coated with the silicone rubber coating is smooth, thus friction with urethra can be reduced, the insertion is convenient and comfortable, injuries on urethra or urinary bladder can be avoided, risks of bacterial infection and necrosis can be reduced, and pains or guide hole blockage caused by drawing of salt incrustation that is resulted from deposition of solid salt in the end head or the cavity of the guide pipe can be reduced.

The invention provides a built-in catheter. The built-in catheter comprises a catheter body and a control valve, wherein the inside of the catheter body is hollow and serves as a urine guide cavity, one end of the catheter body is provided with a urine inlet, the other end of the catheter body is provided with a urine outlet, the catheter body comprises a partes prostatica part, a membranous partand a bulb part, the control valve is positioned inside the urine guide cavity and is used for controlling the on-off state of the urine guide cavity, in order to enable the catheter body to be stablyfixed inside the male urethra, the partes prostatica part is provided with a partes prostatica bulge, the bulb part is provided with a bulb bulge, the membranous part is provided with a membranous sinking part, the partes prostatica bulge, the bulb bulge and the membranous sinking part between the partes prostatica bulge and the bulb bulge are bent-dumbbell-shaped in the male urethra, thus the front-back movement of the catheter body can be prevented, and meanwhile, the interference pressing for the neck of the male bladder and the urethra can be eliminated.

An operation process of catheter placement will seriously stimulate a urethra and a bladder clinically, physiological and pathological stenosis and curve of the urethra of a human body will make it harder to place the catheter and will aggravate damage to a lower urinary tract in a placement process, and damage to the lower urinary tract will induce or aggravate lower urinary tract infection, which will further affect functions of the lower urinary tract or organs of the whole body. Methods for treating urethrostenosis currently include: 1, a high strength head or metallic probe bar or guide wire is used to enhance an external force to push the catheter, which will cause damage to an inner membrane of the urinary tract and even infection; 2, an outer surface of the urinary tract is paintedwith a lubricating oil or a lubricating coating, but the this method is not useful in urethrostenosis while being used independently. The invention provides a stenosis dilated catheter; and when thestenosis dilated catheter is placed, an expandable portion of a fin section of the head is filled, the urinary tract is painted with a lubricating agent, the placement successful rate is improved, andthe damage and infection risk is minimized.

The invention discloses a urethral catheterization device for a urological clinical operation. The device comprises a base and a vertical plate vertically arranged at the right end of the upper surface of the base, a urethral catheterization device body is fixedly arranged on the left side of the vertical plate and made of transparent plastic materials, a support fixedly mounted on the vertical plate is arranged above the urethral catheterization device body, a rotating motor is fixedly mounted on the support, and a cam is fixedly connected on an output shaft of the rotating motor. According to the urethral catheterization device for the urinary surgery clinical operation, catheterization can be conveniently and rapidly implemented in the body of a patient, and the device solves the problems that time and labor are wasted, and urethral catheterization efficiency is low as urethral catheterization is manually implemented by a doctor. Workload of the doctor is relieved, working efficiency is improved, urine in a temporary storage cavity can be prevented from returning into the body of the patient from a urethral catheter, namely, return of the urine in the urethral catheter is avoided, and normal urethral catheterization of people can be guaranteed.

The invention provides a reuse-prevented disposable urethral catheter based on urology surgery and relates to the technical field of equipment for the urology surgery. The problem that a urethral catheter has no corresponding marks to prove primary use, this defect is extremely easily used by illegal businessmen, used urethral catheters are flushed and then are subjected to secondary distribution,and disease propagation and cross infection are extremely easily caused is solved. The reuse-prevented disposable urethral catheter based on the urology surgery comprises a urethral catheter, whereinthe head end of the urethral catheter is connected with a urine guiding end, a flushing end and a medicine injection end separately, and the urine guiding end part is in sealed socket joint with a urine bag plug. During withdrawing, the urine guiding end at the right side of an arc-shaped bulge region is completely cut off by a cutting edge end of a cutter, and the urine guiding end of the urethral catheter cannot be continued in service, so that the disposable urethral catheter is prevented from being reused by other people, and the occurrence of cross infection circumstances is avoided.

The invention relates to a urethra washing catheter. A drainage cavity channel is arranged in the catheter, a saccule is arranged on the catheter, the catheter is of a multi-cavity tube structure, the drainage cavity channel is the main cavity channel, and a bladder washing cavity channel and a urethra washing cavity channel are arranged on the tube wall of the drainage cavity channel. A connecting-in port is arranged on each cavity channel on the catheter, and a washing micro hole is formed in the tube wall of the urethra washing cavity channel close to the saccule. The urethra washing catheter is applicable to clinical care, the design method of the multi-cavity tube structure is adopted, the catheter is divided into a plurality of different runners which achieve corresponding functions, are independent and do not affect each other, and therefore retrograde infection and cross infection caused by runner mixing are effectively avoided.

The invention discloses a simple urine leakage prevention water bag valve urethral catheter, which belongs to a medical instrument. According to the urethral catheter, a circle of skirt-shaped valve is newly and additionally arranged above a common water bag urethral catheter water bag to realize leakage prevention. The skirt-shaped valve is shrunk and attached to the urethral catheter water bag part at a production stage by means of a special process or adhesion action; after the urethral catheter is determined to enter the bladder in use, water is injected from a water injection port of the water bag, and the skirt-shaped valve is expanded along with water injection of the water bag to be opened and be separated from the original water bag; the skirt valve is attached to the neck of the bladder by means of pressure of the water bag and internal pressure of the bladder just like a piece of thin film covering the water outlet; no matter whether the urethral catheter is closely attached to the urethra, the skirt valve has a seepage blocking effect on the neck of the bladder; and even if the bladder of a patient is actively or non-actively (stimulated) shrunk, the valve is more closely pressed around the neck of the bladder when the pressure of the bladder increases, no dead space exists, the seepage of urine around the urethral catheter can be effectively prevented, and reverse infection is prevented. The urethral catheter is easy and convenient to operate; and compared with the conventional urine catheterization, the workload is not increased.

The invention provides a catheter, and relates to the technical field of medical apparatuses and instruments. The catheter comprises a main pipe and multiple air sacs located on the head of the main pipe; the multiple air sacs are arranged on the outer wall of the main pipe, and are arranged in the circumferential direction of the main pipe at intervals; a drainage channel and multiple water injection channels are formed inside the main pipe; drainage holes communicated with the drainage channel are formed between the air sacs on the main pipe, and the end, away from the air sacs, of the drainage channel is communicated with the outside; the multiple water injection channels are communicated with the multiple air sacs, and each water injection channel is communicated with at least one airsac. When one or more air sacs are leaked, the rest of non-leaked air sacs can continue to normally work to guarantee that the main pipe continues to relatively fix to the bladder, and it is guaranteed that the drainage holes are located inside the bladder.

The disclosure provides an incontinence prevention device provided with a loop type retention structure. The retention structure is in the form of a closed loop attached to the distal end of a shaft. The shaft is configured to function as an incontinence prevention device. The retention structure projecting laterally from and configured non-concentrically along the longitudinal axis of the shaft retains the incontinence prevention device within the patient. The retention structure may additionally include a protuberance extending therefrom. There is further provided a method for using the urethral catheter.

The invention discloses a medistream urine extraction device for men. The medistream urine extraction device comprises an urethral catheter, wherein the urethral catheter comprises an upper section, amiddle section and a lower section; a ring which is protruded inwards is formed on the inner wall of the middle section; a baffle is arranged on the lower side of the ring; a plurality of through holes which are penetrated up and down and a circular groove are formed in the outer edge of the baffle; the circular groove is located in the inner sides of the through holes; an O-shaped ring is arranged in the circular groove, and is located below the ring; a driving mechanism for driving the baffle to move upwards is arranged on the urethral catheter; a medistream urine outlet pipe is arranged onthe outer wall of the middle section; the inner end opening part of the medistream urine outlet pipe is higher than the baffle; an inserting sleeve of the medistream urine outlet pipe is arranged ina medistream urine collection bottle; and the medistream urine collection bottle is detachably connected to the urethral catheter. Through the adoption of the medistream urine extraction device disclosed by the invention, under the situation that the urination process does not need to suspend or stop, a patient can collect medistream urine, and the defect that in the sampling process, urine is splashed outwards to pollute environment is solved.

The invention discloses an intelligent evaluation method and system for the quality of a catheter, and relates to the field of data processing, and the method comprises the steps: obtaining the information of the catheter; the quality parameter information of the catheter is obtained; obtaining quality parameter information of the standard catheter; a standard catheter quality parameter classification result is obtained, wherein the standard catheter quality parameter classification result comprises a structure parameter classification result, a material parameter classification result and a function parameter classification result; obtaining a structure quality evaluation result; obtaining a material quality evaluation result; obtaining a function quality evaluation result; based on this, a comprehensive quality assessment result is obtained. The technical problem that in the prior art, the quality evaluation accuracy of the catheter is not high, and then the quality evaluation effect of the catheter is not good is solved. And the technical effects of improving the accuracy and precision of the quality evaluation of the catheter, further improving the quality evaluation effect of the catheter and the like are achieved.

The invention discloses a method for establishing a bladder cancer in-situ model of a nude mouse. The method is characterized by comprising the following steps of: narcotizing a female nude mouse superficially, and inserting a urethral catheter with a side hole into a bladder from a urethral canal, so that negative pressure is formed in the urethral catheter continuously; penetrating a cutter into the urethral catheter, and adjusting the positions of a cutting inclined plane and the side hole of the urethral catheter; cutting under the negative pressure to cut part of mucous membrane layers off, so that the lower layer of a bladder mucous membrane is exposed to form a local wound surface; and pouring human bladder cancer cell suspension which is in the logarithm growth period into a bladder cavity of the nude mouse and reserving for a period of time, discharging the cell suspension out, and establishing the superficial bladder cancer model after 7 days. Compared with the conventional electrocauterization method, the conventional chemical medicinal corrosion method and the conventional bladder puncture intracavity cutting method, the method has the advantages that molding assemblies are low in production cost, and the method for establishing the bladder cancer model is good in effect, the device is easy to operate, the time is short, the nude mouse has little pain, and death caused by anesthesia, operation strike and infection is reduced obviously.

A silver ion bactericide has a broad-spectrum antibacterial effect and avoids drug resistance as well as strain variation of microorganisms. Therefore, silver ions are currently an important research direction of the biomedical technology industry. According to the invention, an in-situ synthesis method is adopted for the first time to prepare a conductive conjugate polyelectrolyte / silver halide nanocomposite; and a long-acting broad-spectrum antibacterial effect is realized by adopting a silver halide nanocomposite taking the conductive conjugate polyelectrolyte as a carrier as a broad-spectrum antibacterial material and controlling the size of the silver halide nanoparticles complexed in the conductive conjugate polyelectrolyte to regulate the release rate of silver ions. In the invention, the application of the conductive conjugate polyelectrolyte in biomedicine and particularly the antibacterial field is exploited, and an antibacterial material which avoids toxic and side effects to a human body and is easy to spray and regulate and convenient to use is provided; and the antibacterial material has a broad application prospect in various conduits (catheters and air ducts), dressings and preparations as well as the long-acting mould and bacteria prevention of precise instruments.

A pressure sensing catheter system includes a urethral catheter and a sensor array formed on the urethral catheter. The sensor array includes a plurality of pressure sensors distributed along a length of the urethral catheter. The sensor array is configured to produce a dynamic pressure distribution profile along a urethra.

This document provides methods and materials involved in holding tension on a urethral catheter and / or stabilizing the movement of a urethral catheter. For example, devices configured to allow a physician to hold tension on a urethral catheter and stabilize movement of a urethral catheter at the urethral meatus in a mammal (e.g., a human) in a non-invasive manner as well as methods for using catheter tension holding and movement stabilizing devices are provided.

The invention discloses preparation technology for a novel saccule urethral catheter and the novel saccule urethral catheter obtained by adopting the same technology. The novel saccule urethral catheter comprises a catheter body, the catheter body comprises an inner layer tube and an elastic outer layer, a medium layer used for connecting the inner layer tube with the outer layer is further arranged between the inner layer tube and the outer layer, a saccule turgor cavity channel is formed in the tube wall of the inner layer tube, a liquid drainage hole is formed in the far end of the catheter body, the novel saccule urethral catheter further comprises an isolation layer arranged at the far end of the catheter body and with the adhesive force decreasing with water, the isolation layer is arranged between the medium layer and the outer layer, or the isolation layer is arranged between the inner layer tube and the medium layer, and the saccule turgor cavity channel extends to the position of the isolation layer. The novel saccule urethral catheter can guarantee that no step exists between a saccule structure and the catheter body, in addition, the saccule structure is in accordance with the diameter of the catheter body, and the medical risk when the product is used and the machining difficulty when the product is machined are reduced. Meanwhile, the invention further provides the preparation technology for the novel saccule urethral catheter.

A urethral catheter and its method of use to identify a patient's urethral anatomic course for the precise placement of a treatment element into the patient's prostate are provided. An echo-opaque urethral catheter including an echogenic material and a radio-opaque material in at least an image portion thereof is introduced into a urethra until its echogenic and radio-opaque image portion is generally aligned with a treatment site of the prostate. An image probe positioned relative to the treatment site is activated to obtain a real time image of the prostate and urethra by ultrasound or X-ray imaging. The echo-opaque urethral catheter includes an elongated flexible catheter, at least the image portion of which, is coated with, incorporates within or is enclosed by the echogenic and radio-opaque materials that enhance ultrasound and radio visualization.

A disposable sterile urethral catheter set with an irradiation-resistant water-containing injection syringe comprises a urethral catheter, a drainage bag, rubber surgical gloves, a medical compress towel, a tray and a wrapping fabric and further comprises an individually-packaged water-containing injection syringe and povidone-iodine cotton balls. The water-containing injection syringe is packaged with an aluminum foil composite membrane and sterilized by cobalt-60 irradiation. The water-containing injection syringe is composed of an injection syringe tube body (1), a push rod (2), a rubber plug (3) and a cap (4). The injection syringe is made from an irradiation-resistant material; volume scale marks (5) are printed on the tube of the injection syringe; specified sterile water can be poured accurately and water is prevented from being polluted by irradiation sterilization. The disposable sterile urethral catheter set with the irradiation-resistant water-containing injection syringe is convenient for medical and nursing staff, and avoids the increasing of the preparation workload before surgical operation caused by preparation and water injection of the injection syringe after the urethral catheter set is open; and the disposable sterile urethral catheter set is applicable to be used in medical departments.

The invention discloses a novel urethral catheterication device for urinary surgical nursing. The novel urethral catheterication device includes a urethral catheter; the outer side of a sleeve is rotatably provided with a twisting cap, the inside of the sleeve is movably spliced with a plugboard, and the inner wall of the sleeve is movably spliced with an extrusion rod; the outer wall of a rolleris fixedly embedded and connected with a magnetic block; a magnetic conducting plate is fixedly connected inside the sleeve and located and below a magnetic conducting bar; an impact bar is movably spliced on the inner wall of the sleeve and below the magnetic conducting bar; the side, close to the magnetic conducting plate, of the impact bar is fixedly connected with a magnet; a tension spring ismounted between the impact bar and the magnetic conducting plate; the twisting cap is rotated, a transverse wedged plate extrudes the plugboard to move downwards, a magnetic conducting section is incontact with the magnetic conducting plate and the magnetic conducting bar at the same time, the sleeve is moved downwards, when the roller rolls, the magnetic conducting plate is intermittently magnetized by the magnet, the impact bar continuously impacts and crushes a stemming in the urethral catheter under same repulsion of the magnetic conducting plate and the magnet and under the action of the tension spring, and thus, the problem that the urethral catheter is blocked is solved.

The invention discloses a bladder drug delivery device for the department of medical oncology, and belongs to the technical field of medical instruments. The bladder drug delivery device comprises a urethral catheter and a liquid discharge port, wherein a liquid discharge tube head is formed at the rear end of the urethral catheter, a drug delivery port is formed in the front end of the urethral catheter, a drug delivery tube head is formed at the rear end of the urethral catheter, an elastic film is formed at the front end of the urethral catheter, an elastic connecting ring is formed at thetail end of the elastic film, a plurality of elastic supporting rods are fixedly connected with the outer side of the elastic film, the urethral catheter is provided with an expanding part capable ofenabling the front ends of the elastic supporting rods to move towards the outer side, and the elastic film can be unfolded to abut against the inner wall of the bladder to isolate the bladder from urine. According to the bladder drug delivery device, a drug or cleaning liquid can directly act on the inner wall of the bladder, an anti-falling air bag is arranged, and thereby the urethral cathetercan be prevented from accidentally sliding out of the body in the intubation process. Part of the bladder can be isolated from urine, and thereby a liquid medicine cannot be diluted when the bladder is directly administrated or cleaned, so that the full exertion of the medicine effect is facilitated, the treatment speed of a patient is increased, and the pain of the patient is relieved.

The invention discloses a urethral catheter capable of preventing related infection of the urethral catheter, belongs to the field of medical instruments, and solves the problem that the related infection of the urethral catheter is easily caused by the existing urethral catheter. The urethral catheter comprises a pipe body; the front portion of the pipe body is provided with an end opening or / and a side hole, the cross section of the pipe body is triangular, and the vertex of the triangle is a fillet. The pipe body is designed into the triangular pipe, and the three edges of the triangular pipe have an excellent supporting effect on urethra. Due to the design of the triangular pipe, related infection of the urethral catheter can be automatically prevented; on one hand, the contact area of urethral mucosa and the urethral catheter is minimized, the non-contact area is maximized, stimulation of the catheter to the urethral mucosa and adhesion and aggregation of bacteria on the surface of a carrier are reduced to the maximum extent, and formation of bacterial biofilms and urethral secretions is advantageously reduced; and on the other hand, a gap is formed between the urethra and the catheter body and serves as a drainage space, and the outer wall of the catheter body serves as a drainage track, so that local exudates and secretions can be discharged after the urethra operation.

A non-bladder invasive urethral catheter system is provided as a system of apparatuses that provide a means relieving a user's urinary incontinence issues while reducing localized compression to the walls of their urethra. The non-bladder invasive urethral catheter system provides a more convenient and less intrusive means of enabling individuals suffering from urinary incontinence to live an ordinary life. The non-bladder invasive urethral catheter system provides the user with comfort and increased mobility and permits the user to maintain the indwelling catheter during urination. The apparatus blocks urine flow and leakage while installed within a user. The non-bladder invasive urethral catheter system utilizes several urethral catheters that are differentiated by the positioning of a urethral balloon element on the elongated body of the urethral catheter. Through the substitution of the differentiated urethral catheters, the user is able to reduce the trauma to a particular area of their urethra.

A method for insertion, maintenance, and removal of urethral catheters in mammals including humans includes steps for preventing or reducing the incidence of catheter associated urinary tract infections. In addition to sterile procedures currently practiced or as may be practiced in the future in connection with catheter use, the method includes the steps of applying an antiseptic, zwitterionic, and acidic skincare solution capable of preserving the stratum corneum to the perineum, meatus, and contiguous mucosa surrounding the insertion site before insertion, after insertion, periodically during the period of indwelling, in connection with any incidence of incontinence, and, optionally, before and after removal of the catheter. Application of the solution optionally is continued after catheter removal on a periodic basis until the threat of an infection associated with catheter use has passed, typically at least about five (5) to seven (7) days and up to thirty (30) days. The solution pH is desirably from about 4.4 to 5.5.

A device and method for preparing a female patient to receive a catheter includes a female catheter starter cone that is shaped and constructed for insertion into the urethral fold of a women's body that holds the labia majora and labia minora out of the way so that a nurse can visually identify the urethral opening and to facilitate single handed insertion of the catheter tube.

The invention discloses a urethral catheterization auxiliary device and method for elderly female. According to the technical scheme, the device comprises two dilation main bodies which are in rotating connection, and a vision zone for observation is formed between dilation main bodies; one end of each dilation main body is connected with an elastic contact part, and a clamp part is arranged inside the dilation main body; and the two clamp parts are buckled with each other and have an adjustable distance. The urethral catheterization auxiliary device can assist an elderly female to catheterizeurine, so that the success rate of once success for urethral catheterization can be improved, the workload of nursing staff can be reduced, and the occurrence rate of urinary system infection relatedto urinary catheters can be reduced.

A method for insertion, maintenance, and removal of urethral catheters in mammals including humans includes steps for preventing or reducing the incidence of catheter associated urinary tract infections. In addition to sterile procedures currently practiced or as may be practiced in the future in connection with catheter use, the method includes the steps of applying an antiseptic, zwitterionic, and acidic skincare solution capable of preserving the stratum corneum to the perineum, meatus, and contiguous mucosa surrounding the insertion site before insertion, after insertion, periodically during the period of indwelling, in connection with any incidence of incontinence, and, optionally, before and after removal of the catheter. Application of the solution optionally is continued after catheter removal on a periodic basis until the threat of an infection associated with catheter use has passed, typically at least about five (5) to seven (7) days and up to thirty (30) days. The solution pH is desirably from about 4.4 to 5.5.

The invention relates to a preparation method of nano calamine antibacterial silicone rubber, which comprises the following steps of: preparing 1-50nm nano calamine with uniform size through wet ball milling, doping the nano calamine into silicone rubber, banburying and blending, vulcanizing, and carrying out hot press molding. Through cooperation of all the raw materials and all the steps, the nano calamine antibacterial silicone rubber which is high in safety, good in antibacterial property and long-acting can be obtained, and the nano calamine antibacterial silicone rubber has broad-spectrum antibacterial property and has high antibacterial rate on gram-negative bacteria and gram-positive bacteria. The invention also relates to an application of the provided nano calamine antibacterial silicone rubber in antibacterial medical instruments, including but not limited to urethral catheters.

The invention relates to a urethral probe for urethral catheter indwelling. The urethral probe comprises a stainless steel probe body, the stainless steel probe body is a cylindrical shell formed by a body I and a body II in a butt-joint mode, the section of the body I and the section of the body II are semicircular, rhombic clamping strips are arranged at the two butt-joint ends of the body I and are arranged in the length direction of the body I, rhombic clamping grooves matched with the shapes of the rhombic clamping strips are formed in the two butt-joint ends of the body II, a gap matched with the wall thickness of the body I is formed in the end, far away from the body II, of each rhombic clamping groove, and when the body I and the body II are in butt joint, the rhombic clamping strips of the body I are arranged in the rhombic clamping grooves of the body II. According to the urethral probe, the urethra can be expanded, meanwhile, a urethral catheter can indwell, the hardness of the existing urethral catheter is increased, the toughness of the pointed end of the urethral catheter is ingeniously utilized for expanding the urethra, and hurt of the pointed end of an existing metal probe to the urethra and fake urethra forming are avoided.