53 results about "Catheter replacement" patented technology

The invention discloses a controllable windmill-shaped PFA catheter and a remote catheter ablation device, and relates to the technical field of catheter ablation and medical instruments, the controllable windmill-shaped PFA catheter comprises a catheter, the catheter is led out of a catheter body, the head end of the catheter is of a windmill structure, a magnetic sensor and a plurality of electrodes are arranged on a framework of the windmill structure, and the windmill structure can be contained in a sheath tube; one end of the catheter body is led out of the catheter, and the catheter body is arranged in the sheath tube; one end of the catheter handle is led out of the catheter body, the catheter handle is matched with a gear assembly of an electrophysiology interventional instrument, and the gear assembly at least comprises three sets of gears used for achieving corresponding operation actions. According to the windmill-shaped PFA ablation catheter, the electrodes are evenly distributed on the windmill-shaped framework, even electrode distribution is formed on the target pulmonary vein, and an operator can conduct ablation without replacing the catheter while completing three-dimensional point mapping dissection.

A catheter having a proximal opening, a distal opening, a lumen extending through the catheter and a side opening forming a rapid exchange port dimensioned and configured for insertion of a guiding device through the side opening. The catheter includes a seal movable between a closed position to reduce leakage through the side opening and an open position, wherein the seal is movable to an open position by the guiding device. The catheter can have one or more independently deflectable zones.

The invention relates to a multifunctional airway intubation auxiliary device, belongs to the technical field of medical instruments, and solves the problems that an airway intubation auxiliary device in the prior art is single in function and only can be used for assisting in tracheal intubation or assisting in catheter replacement. The device comprises an auxiliary pipeline, an angle adjusting unit, a control unit and a supporting unit, the angle adjusting unit, the control unit and the supporting unit are all arranged on the auxiliary pipeline, and the angle adjusting unit is used for adjusting the bending angle of the auxiliary pipeline; the control unit is connected with the angle adjusting unit and used for controlling the angle adjusting unit to act. The supporting unit is used for supporting the auxiliary pipeline and preventing the auxiliary pipeline from being extruded by the oropharynx part of the patient to deform. The airway intubation auxiliary device not only can be used for assisting tracheal intubation, but also can be used for assisting replacement of a catheter, so that a medical worker does not need to carry a plurality of different airway intubation auxiliary devices during treatment, the workload of the medical worker is reduced, and the working efficiency of the medical worker is also improved.

The utility model discloses a deep vein catheter replacement box, relates to the technical field of medical instruments, and provides the following scheme that the deep vein catheter replacement box comprises a storage box, and by arranging a tray and a clamping block, when the deep vein catheter replacement box is used daily, in order to improve the attention of medical staff on taking objects in the deep vein catheter replacement box, the storage box is convenient to use; when the drawer needs to be opened, the drawer is squeezed inwards, at the moment, the drawer can squeeze a telescopic rod, the telescopic rod moves to drive a sliding block to slide in a fixed box and squeeze a spring, meanwhile, the sliding block slides to drive a sliding column to slide along the inner wall of a sliding groove, and a rotating rod is driven to rotate, so that the drawer can be conveniently opened. The sliding block slides to drive the connecting plate to slide, so that the rotating rod slides along the inner wall of the fixing groove and is driven to rotate downwards, the rotating rod and the clamping block are disengaged from each other, the drawer is loosened, and under the reaction effect of the spring, the effect that the drawer pops up and is taken out of the storage box is achieved.

1. The name of the product of this design: Deep venous catheter replacement box. 2. Purpose of the product of this design: a box for storing items used for deep vein puncture. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The utility model relates to the field of medical instruments, in particular to a child tracheal catheter replacement guide wire which comprises a catheter body. The catheter comprises a catheter body and further comprises a core wire, a winding spring, a connector and a hydrophilic layer, the core wire is arranged in the catheter body, the outer side of the core wire is annularly sleeved with the winding spring, the connector is arranged at the top of the catheter body, the top of the core wire is connected with the bottom of the connector, the outer side wall of the core wire is wrapped with the hydrophilic layer, and the outer side wall of the winding spring is provided with a lubricating layer. By arranging the protective structure, the tracheal wall can be prevented from being damaged in the catheter replacement process, and the problems that when a common tracheal catheter is replaced and used, the catheter needs to be rapidly replaced, and although a guide wire can be inserted into the catheter due to the fact that the penetrability of the tip end of the guide wire of the catheter is high, the catheter cannot be rapidly replaced are solved. However, a protection structure is lacked, so that the tracheal wall is easily damaged in the catheter replacement process, the normal use of the catheter is influenced, and the use safety and practicability of the tracheal catheter are reduced.

A catheter system may include a dual lumen catheter. The dual lumen catheter may comprise an inner lumen configured to accommodate interventional devices and an outer lumen surrounding the inner lumen. The outer lumen may comprise a plurality of contrast injection ports and a shape-changing mechanism. Additionally, a rotation mechanism may be coupled to a proximal end of the dual lumen catheter and configured to rotate the dual lumen catheter. A locking mechanism may also be included, configured to maintain a shape of the dual lumen catheter. This system allows for enhanced control and functionality during medical procedures, potentially improving the delivery of treatment and diagnostic capabilities without the need for catheter exchange.

The utility model provides an external CVC catheter fixing device which comprises an elastic bandage and an elastic pressing belt, one end of the elastic pressing belt is connected with the upper surface of the elastic bandage in a sewing mode, and the other end of the back face of the elastic pressing belt is connected with the elastic bandage through a first hook-and-loop fastener. The upper surface of the elastic bandage is provided with a plurality of resistance-increasing soft rubber strips which are reversely arranged and distributed in the length direction, the resistance-increasing soft rubber strips are opposite to the back face of the elastic pressing belt, and the adjacent resistance-increasing soft rubber strips form a positioning groove used for limiting the CVC catheter. The fixing device has the advantages that the fixing position is convenient to adjust, the outer surface of the CVC catheter is smooth after the CVC catheter is limited, the operation of medical staff is not affected, and the placement position of the CVC catheter is more convenient to replace.

A catheter system may include a dual lumen catheter. The dual lumen catheter may comprise an inner lumen configured to accommodate interventional devices and an outer lumen surrounding the inner lumen. The outer lumen may comprise a plurality of contrast injection ports and a shape-changing mechanism. Additionally, a rotation mechanism may be coupled to a proximal end of the dual lumen catheter and configured to rotate the dual lumen catheter. A locking mechanism may also be included, configured to maintain a shape of the dual lumen catheter. This system allows for enhanced control and functionality during medical procedures, potentially improving the delivery of treatment and diagnostic capabilities without the need for catheter exchange.

The utility model discloses an ear medicine feeding device for otolaryngology department, relates to the technical field of medicine feeding devices, and comprises a main body, the left side of the main body is rotatably connected with a rotating block, the right side of the main body is fixedly connected with a liquid adding pipe, the outer wall of the liquid adding pipe is provided with a valve, and the upper side of the main body is provided with a clamping mechanism. The upper side of the clamping mechanism is fixedly provided with a connecting column, the upper side of the connecting column is fixedly connected with a guide pipe, the lower side of the inner wall of the main body is fixedly connected with an infusion pump, the input end of the infusion pump is fixedly connected with an infusion pipe, the output end of the infusion pump is fixedly connected with a liquid outlet pipe, and the inner wall of the main body is fixedly connected with a fixing block. Through mutual matching of the mounting block, the rotary knob, the connecting plate, the movable plate, the threaded rod, the U-shaped plate, the sliding block, the limiting block and the limiting groove, the catheter can be rapidly replaced, the risk of cross infection can be effectively reduced by replacing the new catheter, and sanitation and cleanliness of the ear medicine feeding device can be kept.

This utility model discloses a catheter seat assembly and a long-term dialysis catheter. The catheter seat assembly includes a catheter seat, a supporting inner tube, a locking outer tube, and a fixing ring. The catheter seat has a first end and a second end, which are detachably connected to an extension tube and a dialysis main tube, respectively. The supporting inner tube supports the proximal inner wall of the dialysis main tube and is placed inside the second end of the catheter seat. The locking outer tube is sleeved outside the supporting inner tube and wraps around the proximal end of the dialysis main tube, and is connected to the second end of the catheter seat. The fixing ring is sleeved outside the locking outer tube and locks the locking outer tube radially along the dialysis main tube to the proximal end of the dialysis main tube. In this utility model, the catheter seat assembly, through optimized structural design, is detachably connected to the dialysis main tube. When the catheter seat becomes blocked, it can be separated from the dialysis main tube by disassembling the catheter seat assembly, requiring only the replacement of the catheter seat assembly.

The dialysis catheter replacement connector comprises a flow divider, a first catheter, a second catheter and a third catheter, one end of the first catheter and one end of the second catheter are communicated with one end of the third catheter through the flow divider, and the other end of the first catheter is provided with a one-way valve used for inserting a guide wire. The other end of the second catheter is provided with a second catheter connector used for being connected with a radiography syringe, and the third catheter is provided with a third catheter connector used for being connected with the shearing opening of the built-in catheter. According to the dialysis catheter replacement tube connector, radiography and placement of a guide wire into the body of a patient can be conducted at the same time, operation of a doctor is facilitated, operation risks are reduced, and medical safety is improved; the catheter infection probability in the catheter replacement process can be further reduced; the blood loss of a patient can be reduced, the surgical tolerance of the patient is improved, and the postoperative recovery time is prolonged; the medical experience of the patient can be improved, and the satisfaction degree of the patient is improved.

According to the handle and the medical catheter device, when the bent shape of the far end of the catheter is controlled through the fixed bending structure and the friction resistance part, the control force at the handle can be gradually increased along with the bending control angle when small-angle bending control is adjusted to large-angle bending control, and the control hand feeling of an operator is improved; the bending control radius of the adjustable bending section of the guide pipe can be changed by controlling the bending auxiliary part to move, so that the bending control radius can be adjusted under the condition that the guide pipe is not replaced.

The utility model relates to the technical field of medical instruments, in particular to a catheter fixing sticker with a buckle, which comprises a nose adhesive tape, fixing bands are connected to two sides of the nose adhesive tape, a double-sided adhesive tape is connected to the lower part of the nose adhesive tape, and the annular buckle is adhered to the double-sided adhesive tape; the annular buckle is fixed to the position in front of the nostrils of a patient through the nose adhesive tape and the double-faced adhesive tape, the specific position of the annular buckle can be adjusted according to different body types of different patients, and therefore the adaptation degree is improved, and the wearing comfort degree is increased; the nasal catheter is fixed through the annular buckle, so that the adhesive tape does not need to be torn off when the catheter needs to be replaced, unnecessary pain of a patient is reduced, and the catheter is more convenient to replace.

To provide a medical dressing material capable of preventing an incident such as extraction of a needle hub of a catheter during replacement.SOLUTION: A medical dressing material comprises a dressing body 8 that has a skin-side backside and a front side opposite to the backside, and a release sheet (release paper 7) that is peelably stuck on the backside. The backside has an adhesive part and a non-adhesive part. The vertical length and width of the non-adhesive part are 40 mm or more. The adhesive part is formed to surround the non-adhesive part.SELECTED DRAWING: Figure 2

The invention relates to the technical field of multifunctional catheters, in particular to a multifunctional catheter for treating vascular stenosis. The tubular body defines a cavity, the cavity comprises a first cavity and a second cavity, the cross sectional areas of the first cavity and the second cavity are small and large, and the first cavity and the second cavity extend from the near end of the tubular body to the far end of the tubular body and then are communicated with the outside; the first connecting tube and the second connecting tube are located at the near end of the tubular body, one end of the first connecting tube is connected with the input end of the first cavity, the other end of the first connecting tube is used for being connected with a contrast agent injection device, and the second connecting tube is connected with the input end of the second cavity and serves as a guide opening for conveying interventional instruments; the first cavity and the second cavity are formed in the tubular body, so that seamless switching between a radiography step and an interventional therapy step can be realized; keeping the catheter in situ in the whole diagnosis and treatment period; the multifunctional cavity is compositely utilized, so that the operation time is greatly saved, and the problem that blood vessels are easily damaged due to repeated replacement of catheters is solved.

The utility model discloses a spray deposition conduit capable of being quickly replaced, and belongs to the technical field of experimental equipment. The spray deposition guide pipe capable of being rapidly replaced comprises a clamp, a movable sleeve, a fixed sleeve, a movable guide pipe and a fixed guide pipe. The lower end of the fixed catheter is fixedly connected with the upper end of the fixed sleeve; the inner wall of the movable sleeve is in clearance fit with the outer surface of the movable conduit; the movable catheter penetrates through the movable sleeve, is detachably fixed in the fixed sleeve and is connected with the lower end of the fixed catheter, and the movable catheter and the fixed catheter have the same inner diameter and are internally communicated after being connected; the upper end of the movable sleeve and the lower end of the fixed sleeve are tightly connected through a clamp to guarantee sealing performance of the guide pipe. According to the utility model, only the guide pipe I needs to be replaced when the guide pipe is replaced, the replacement speed is high, and the problem of liquid leakage caused by abrasion of the discharge port under the corrosion and disassembly action of waste liquid due to repeated disassembly of the guide pipe when the spray deposition medium is replaced and the waste liquid of the spray material conveying chamber and the spray deposition chamber is cleaned in the traditional spray deposition plating equipment is solved.

The invention relates to a replacement-free dilating catheter with a multifunctional bin, and relates to the technical field of medical instruments. Comprising a working bin, an expansion assembly and a filling assembly. The dilation assemblies are used for entering blood vessels to dilate lesion positions, the multiple dilation assemblies are arranged in the working bin in a sliding mode, and the dilation sizes of the dilation assemblies are different; the filling assembly is arranged on the working bin and used for being communicated with each expansion assembly and expanding the expansion assemblies. In the whole expansion process, the guide wire is not separated from the lesion far end in the whole process, the displacement risk is completely eradicated, and absolute reliability of an operation path is ensured; the dilation assembly does not need to replace the catheter and is switched only through the pushing piece, and the operation time is greatly shortened.

The invention discloses a clinical gastric lavage device for gastroenterology department nursing, and relates to the field of gastric lavage devices.The clinical gastric lavage device comprises a box body, two independent cavities are formed in the box body, the clinical gastric lavage device further comprises a water purification bag, the water purification bag is installed in one cavity and used for storing gastric lavage liquid, a liquid injection needle tube is communicated with an outlet, and the liquid injection needle tube is communicated with the other cavity. The cavity where the water purification bag is located is closed and can be pressurized, the waste water bag is installed in the other cavity and used for storing waste water pumped out of the stomach, a liquid return needle tube is communicated with an inlet of the waste water bag, and a pump body for pumping liquid into the waste water bag is installed in the box body. When gastric lavage work is carried out, only the catheter, the clean water bag, the sewage bag and other consumables need to be replaced, the gastric lavage device does not need to be cleaned, and medical staff can conveniently carry out gastric lavage work on a patient.

The utility model is suitable for the technical field of pulmonary artery interventional therapy devices, and provides a pulmonary artery interventional therapy catheter and a conveying system.The pulmonary artery interventional therapy catheter comprises a main catheter body, a guiding catheter body and an extending catheter body, the guiding catheter body is movably installed in the main catheter body, and a first elastic guiding section is formed at the far end of the guiding catheter body; the first elastic guide section can at least partially extend out of the far end of the main body catheter to form a first arc-shaped guide structure; the extension catheter is movably installed in the guiding catheter, a second elastic guiding section is formed at the far end of the extension catheter, and at least part of the second elastic guiding section can extend out of the far end of the guiding catheter to form a second arc-shaped guiding structure. According to the pulmonary artery interventional therapy catheter, the catheter does not need to be replaced in the interventional therapy process, and universality is high.

The utility model discloses an infusion pump capable of preventing pollution, and relates to the technical field of infusion pumps. The device comprises a supporting frame, a movable cavity and a liquid conveying pipe fitting, an inner box body is fixed to one side in the supporting frame, a movable strip is fixed to the position, on one side of the inner box body, of the bottom in the supporting frame, an inner plate is fixed to the middle of the inner wall of the inner box body, a rotating disc is arranged above the inner plate, and rotating rods are fixed to the edge of the top end of the rotating disc in an annular array mode; a movable cavity is movably connected into the supporting frame on the outer side of the movable strip, the bottom of the movable cavity is movably connected to the outer side of the movable strip, a liquid conveying pipe is movably connected to the side, close to the inner box body, of the upper portion of the movable cavity in a penetrating mode, and a movable hole is formed in the front side of the movable cavity in a penetrating mode; and the infusion tube is movably connected in the movable hole in a penetrating manner. Through the arrangement of the supporting frame, the movable cavity and the infusion pipe fitting, the problems that liquid medicine pollution is likely to be generated when the infusion pump replaces and conveys liquid medicine, and a catheter needs to be overall disassembled and is inconvenient to operate when replaced are solved.

The utility model discloses a controllable windmill-shaped PFA catheter, and relates to the technical field of catheter ablation and medical instruments, the controllable windmill-shaped PFA catheter comprises a catheter (1), the catheter (1) is led out from a catheter body (2), the head end of the catheter is of a windmill structure, a magnetic sensor and a plurality of electrodes are arranged on a framework of the windmill structure, and the windmill structure can be contained in a sheath tube; one end of the catheter body (2) is led out of the catheter (1), and the catheter body (2) is arranged in the sheathing canal; one end of the catheter handle (3) is led out of the catheter body (2), the catheter handle (3) is matched with a gear assembly of an electrophysiological interventional instrument, and the gear assembly at least comprises three sets of gears used for achieving corresponding operation actions. According to the windmill-shaped PFA ablation catheter, the electrodes are evenly distributed on the windmill-shaped framework, even electrode distribution is formed on the target pulmonary vein, and an operator can conduct ablation without replacing the catheter while completing three-dimensional point mapping dissection.

The catheter seat assembly comprises a catheter seat, a supporting inner tube, a locking outer tube and a fixing ring, the catheter seat is provided with a first end and a second end, and the first end and the second end are detachably connected with an extension tube and a dialysis main tube respectively; the supporting inner tube is used for supporting the inner wall of the near end of the dialysis main tube and is arranged in the second end of the catheter seat; the locking outer tube is arranged outside the supporting inner tube in a sleeving manner, wraps the near end of the dialysis main tube and is connected with the second end of the catheter seat; the fixing ring is arranged outside the locking outer tube in a sleeving mode and locks the locking outer tube to the near end of the dialysis main tube in the radial direction of the dialysis main tube. According to the scheme, the catheter seat assembly is detachably connected with the dialysis main pipe through structural optimization design, and when the catheter seat is blocked, the catheter seat assembly can be detached, the catheter seat assembly and the dialysis main pipe can be separated, and only the catheter seat assembly is replaced.

The present application provides a diagnostic and treatment catheter for a vascular lesion area, including a catheter body and an FFR detection assembly. The catheter body has a first cavity and a second cavity that are independent of each other. The FFR detection assembly is arranged in the first cavity, and the FFR detection assembly includes an FFR cable and an FFR probe that are interconnected, and the FFR probe is located at the front end of the first cavity. The second cavity is used for the imaging detection assembly to penetrate, and the imaging probe of the imaging detection assembly is located at the front end of the FFR probe. The diagnostic and treatment catheter in the present application can establish two working chambers through one catheter. When the patient needs FFR measurement technology and OCT (or IVUS) technology to jointly guide clinical treatment, the pressure value and image acquisition can be measured simultaneously through one catheter. There is no need to change the catheter for two measurements during the operation, thereby reducing the operation time and difficulty of the operation, and reducing the patient's surgical risk and treatment cost.

The tracheotomy catheter comprises a catheter main body, a catheter cavity is formed in the catheter main body, at least two layers of films are arranged in the catheter cavity, the film on the innermost layer is adhered to the inner wall of the catheter cavity, the films are slightly adhered, the tip side parts of the films are reversely folded and extend out of the upper end of the catheter cavity, and the tip side parts of the films are slightly adhered to the inner wall of the catheter cavity. A connector is inserted into the upper end of the catheter body, a fixing support is arranged on the outer side of the catheter body, the catheter body is matched with the fixing support in an inserted mode, an air bag is arranged at the lower end of the catheter body, and a sputum suction assembly is arranged on the outer side of the air bag. According to the tracheotomy catheter, the problem that a traditional tracheotomy catheter is prone to being blocked by sputum in the using process and consequently breathing difficulty is caused is effectively solved, harm caused by catheter replacement or operation again to a patient is reduced, meanwhile, the medical cost is reduced, and the tracheotomy catheter has important clinical application value.

The utility model relates to the technical field of medical instruments, and provides a nerve conduit with a guiding function, which comprises a conduit main body, a first channel is arranged at the edge of the bottom surface of the conduit main body, a second channel is arranged at the other edge of the bottom surface of the conduit main body, and a first guiding component is movably inserted into the inner side of the first channel. The first guiding assembly comprises a guiding pipe, a guiding cylinder is fixed to the lower end of the guiding pipe, filtering holes are formed in the outer wall of the guiding cylinder, a connecting pipe is fixed to the outer wall of the upper end of the guiding pipe, a moving rod is fixed to the top end of the guiding pipe, a fixing shaft is fixed to the middle of the top face of the moving rod, and the outer side of the fixing shaft is movably sleeved with a threaded column. The first guide assembly and the second guide assembly can be used as a drug delivery assembly and a drainage assembly respectively, the operation of drug delivery and drainage can be completed without pulling, inserting and replacing the catheter, the pain of a patient can be relieved, and a doctor can operate and use the catheter conveniently.

The utility model relates to the technical field of nasal cavity cleaning tools, and discloses a nasal cavity cleaning tool which comprises a main body, a connector is fixedly installed at the top of the main body, a guide pipe is fixedly installed at the top of the connector, a cleaning head is arranged at the top of the guide pipe, and a micro pump machine is fixedly installed in the main body. A water pumping pipe is fixedly mounted at the bottom of the micro pump machine, and a water storage bottle is in threaded connection with the bottom of the main body. According to the nasal cavity cleaning tool, the connector, the catheter, the water pumping pipe and the water storage bottle are arranged in a matched mode, the device can be more convenient to operate in the using process, the catheter of an internal insertion part can be replaced through rotation due to the arrangement of the connector, the catheter can be selected according to the physical condition of a patient, and the catheter needs to be replaced after being used for a long time; due to the fact that the catheter and the cleaning head are arranged in a matched mode, multi-angle rotation can be conducted under the operation condition, and the nasal cavity of the patient can be comprehensively cleaned.

The invention discloses a thrombus rotary cutting catheter system suitable for multiple lesions, and belongs to the technical field of interventional medical instruments. The system includes a catheter assembly and a powered handle assembly. A composite tool bit, an integrated spiral star-shaped grinding head, a rotary cutting tool bit and a flexible scraper tool bit are arranged at the head end of the catheter assembly and can be selectively used according to thrombus properties; a spiral steel cable with a spiral blade is arranged in the catheter and used for power transmission and thrombus delivery. A driving device, a thrombus outflow pipeline and a guide wire assembly are arranged in the power handle assembly, and the scraper is controlled to be opened and closed through the flexible scraper trigger button. Through the design of the integrated composite tool bit structure, the built-in guide wire and the waste liquid channel, efficient removal of multiple types of thrombus is achieved, catheter replacement in an operation is avoided, and operation continuity and safety are improved. The system is a disposable consumable, is compact in structure, is simple and convenient to operate, and is suitable for interventional therapy of peripheral blood vessel and other thrombotic diseases.

The female metal catheter comprises a catheter body, a catheterization cavity and an air injection cavity are formed in the catheter body, a catheterization hole is formed in one end of the catheter body, a catheterization connecting pipe is arranged on the outer side of the other end of the catheter body, and the catheterization cavity, the catheterization hole and the catheterization connecting pipe are communicated; a ventilation window is formed in the position, close to the catheterization hole, of the outer side of the catheter body, an annular air bag is arranged at the position, corresponding to the ventilation window, of the outer side of the catheter body, and a connecting cavity is formed in the other end of the catheter body. The female metal catheter provided by the invention is made of a metal material, is high in strength and good in durability, is not easy to age and deform, can be stably used for a long time, and reduces the pain and inconvenience caused by frequent replacement of the catheter to a patient; a perfect urethral catheterization and air injection channel is provided, urethral catheterization is smooth, through the arrangement of the one-way valve, air backflow is prevented, stable expansion of the annular air bag is ensured, and the fixing effect is enhanced.

The utility model discloses a catheter limiting device for urinary surgery, and belongs to the technical field of auxiliary devices for urinary surgery. A catheter limiting device for urinary surgery comprises a catheter body and further comprises elastic cloth connected to the legs of a patient in a wound mode, and the surface of the elastic cloth is provided with a cloth cover capable of being stuck by hook-and-loop fasteners. The limiting part is fixedly connected to the elastic cloth, the limiting part is composed of cloth with the two ends abutting against each other, one end of the limiting part is fixed to the elastic cloth, the other end of the limiting part is rotationally connected to the elastic cloth, when the two ends abut against each other, a cavity with the top and the bottom open is formed, and the catheter body is located in the cavity of the limiting part; according to the utility model, the elastic cloth is matched with the magic tape I, so that the catheter body fixed in the limiting part can be directly fixed on the front side of the leg of a patient, the operation is quick and convenient, the catheter is also quick and convenient to replace, the catheter is not adhered with leg hair during subsequent disassembly, and the discomfort of the patient can be effectively reduced.