30 results about "Existing catheter" patented technology

The utility model relates to the technical field of catheter sheath regulation and control, especially a sheath type regulation and control device applied to disposable catheter sheaths, which comprises an external assembly frame, a turnover closing cover plate is installed on the assembly surface of the external assembly frame, an internal assembly groove for installing the disposable catheter sheath is arranged on the assembly surface of the external assembly frame and the turnover closing cover plate, and an external adjustment frame is installed on the side wall of the external assembly frame through a flexible connecting belt. The sheath type regulation and control device applied to the disposable catheter sheath adopts a sheath type structure design, can be directly sleeved on the existing catheter sheath, and is very simple and convenient to assemble and disassemble. The external adjustment frame is installed on the side wall of the external assembly frame through the flexible connecting belt, the external adjustment frame is sleeved on the external catheter, and then the flow or temperature of the catheter is adjusted by the hand control adjustment module inside the external control port, so that the operation is very simple and convenient.

The invention provides an auxiliary balloon blocking catheter, and belongs to the technical field of balloon blocking catheters.The auxiliary balloon blocking catheter comprises a catheter body, a balloon body, an inflation cavity, a guide wire channel, a blocking head, a supporting ring, a power assisting mechanism, a propeller, a positioning mark and a sealing ring, and the power assisting mechanism is arranged in the catheter body and provides active propelling force for a balloon; the supporting ring is circumferentially arranged around the balloon body to guarantee stable shape of the balloon, the plugging head is located at the front end of the balloon body to reduce advancing resistance, the positioning mark is arranged on the surface of the balloon to improve positioning precision, and the sealing ring and the one-way valve guarantee reliable sealing. Through the synergistic effect of the elastic energy storage and transmission functions of the power assisting mechanism, the radial supporting function of the supporting ring, the flow guiding function of the plugging head, the developing function of the positioning mark and the sealing function of the sealing system, the technical problems that an existing catheter is difficult to push, inaccurate in positioning and unstable in plugging effect are solved.

The utility model relates to a catheter fixing device, and belongs to the technical field of urinary surgery auxiliary equipment. The device is composed of a fixing plate, elastic bands, a top cover, stretching units and buckles, the elastic bands are symmetrically arranged on the left side and the right side of the fixing plate respectively, the elastic bands are bonded through hook-and-loop fasteners, the stretching units are symmetrically arranged on the fixing plate, and guide groove wheels are movably installed on the portions, below the two stretching units, of the fixing plate through short shafts. Wherein a buckle is fixedly installed on the fixing plate on one side of one stretching unit, a top cover is arranged on the outer side of the stretching unit, and the top cover and the fixing plate are clamped in a matched mode. The problems that an existing catheter fixing device is too large in binding force, normal outflow of follow-up liquid is affected, and a catheter is directly attached to the inner side of the thigh of a patient and is prone to being excessively stretched and extruded are solved, and the catheter fixing device is quite suitable for urinary patients to fix the catheter.

A method and apparatus for generating a customized cardiovascular catheter shape based on an individual patient anatomy is disclosed. As a result, the on-demand shaping of the custom catheter can be done in the context of a cardiovascular catheter procedure. This can also allow an existing catheter to be reshaped and used even for patient populations with unique or extreme anatomy or with anatomy that is not common for the type of surgery being performed.

The invention provides a medical delivery catheter in the technical field of medical instruments, the medical delivery catheter comprises a delivery catheter layer and a delivery catheter section, the delivery catheter layer comprises a delivery layer, a support skeleton layer and a protective layer, and the delivery catheter section comprises a bidirectional bending adjustment section, a bending adaptation section and a straight section support section. A conveying layer, a supporting framework layer and a protective layer are sequentially arranged on each of the two-way bending adjusting section, the bending adapting section and the straight supporting section from inside to outside, and the supporting framework layers on the two-way bending adjusting section, the bending adapting section and the straight supporting section are of hollow mesh structures. The hollow mesh structures with bending elasticity are adopted on the supporting framework layers on the two-way bending adjusting section, the bending adapting section and the straight supporting section, existing woven wire structures in the current market are replaced, higher supporting performance and torsion resistance are provided for the catheter, the technical problem that an arch back exists on an existing catheter can be solved, and the catheter has the advantages of being simple in structure and convenient to use. And meanwhile, the problem that the pushing force is insufficient in the advancing process of the catheter can be solved.

The invention discloses a three-dimensional guide pipe shaping device and a shaping method thereof.The two end faces of a three-dimensional shaping device body are provided with a heating groove, a plurality of cooling grooves and a shaping groove located in the center, the heating groove and the cooling grooves are axially arranged in a penetrating mode, the cooling grooves are located on the radial outer side of the heating groove, and the cooling grooves and the heating groove are formed in the circumferential direction at intervals; a condenser or a blowpipe is mounted in the cooling tank; a plurality of screw holes used for loading adjusting rods are formed in the side wall of the three-dimensional molding device body, the screw holes penetrate through the heating groove and the cooling groove and directly abut against the molding groove, multiple layers of screw holes are formed in the side wall in the axial direction, a plurality of adjusting rods are arranged in each layer of screw holes in the circumferential direction at intervals and matched with the screw holes in a one-to-one mode, and the adjusting rods are symmetrically distributed on the side wall in pairs. In the molding process, the molding angle of the catheter can be adjusted in real time, the problems that an existing catheter molding mold cannot be adjusted again once the mold is determined and only planar shaping can be conducted in the prior art are solved, the catheter can be better matched with a human body cavity, and the catheter can reach an operation area more easily and rapidly.

The utility model discloses urethral catheter fixing shorts convenient to put on and take off, belongs to the technical field of medical supplies, and solves the problem that existing urethral catheter fixing shorts are inconvenient to put on and take off. The trousers comprise a left trouser piece, a bottom trouser piece, a right trouser piece and a cover piece, the left side and the right side of the bottom trouser piece are fixedly connected with the left trouser piece and the right trouser piece respectively, the cover piece is fixedly connected to the lower side of the bottom trouser piece, and leg openings are formed in the joints between the left trouser piece and the bottom trouser piece and between the right trouser piece and the bottom trouser piece. The left trouser piece and the right trouser piece are folded along the central axis of the bottom trouser piece and then are connected and closed through a zipper or a button to form the triangular shorts, the cover piece is folded upwards to cover the butt joint position of the left trouser piece and the right trouser piece, and the cover piece is connected with the left trouser piece and the right trouser piece through hook-and-loop fasteners. And a first tunnel fixer is arranged on the left trouser piece or / and the right trouser piece. The urethral catheter fixing shorts can fix the urethral catheter, and meanwhile the urethral catheter fixing shorts are more convenient to put on and take off.

A catheter (100, 200, 600, 700) capable of being inserted into the urethra for placement in a user's bladder and urethra, the catheter comprising: a urinary conduit (102, 202, 602, 702, 802) including a first urinary inlet (104, 214, 614, 714, 814) and a urinary outlet (106, 206); and an inlet protector (216, 316, 616, 716, 816) extending outwardly from the urinary conduit from a location between the first urinary inlet and the urinary outlet. The inlet protector is used to protect the urinary inlet by isolating it from the bladder wall and thus preventing it from contacting tissue. In existing catheters, the process of emptying the bladder can cause tissue to be drawn from the bladder wall into the urinary inlet. Tissue may become lodged in the catheter, obstructing the inlet, and the tissue may also be damaged by the process. Additionally, small pieces of tissue may become trapped within the catheter, causing blockages and biofouling, thus reducing flow rate. A high flow rate is better because it flushes out any dirt or urinary deposits from the catheter. Lower flow rates are less effective, allowing deposits to accumulate more quickly and increasing the risk of infection, thus reducing the time the catheter remains in place. An inlet protector positioned between the urine inlet and outlet, extending outwards from the urinary conduit (i.e., keeping the urine inlet away from the urethral opening and bladder), maintains a slight separation between the urine inlet and bladder wall tissue and thus ensures a good flushing flow rate and reduces the risk of biofouling.

The invention discloses a rat parotitis model construction method based on general anesthesia and parotid gland directional injection, which belongs to the technical field of biology and comprises the steps of animal preparation, anesthesia, disinfection incision exposure, LPS injection and postoperative care. The method has the advantages that the parotid gland is directly exposed by adopting a longitudinal incision of the cheek, 2mg / mL LPS (0.2 mL and depth of 2mm) is injected, microscope positioning is not needed, the operation is simple and convenient, inflammation is limited to the parotid gland, pathological characteristics (alveolar injury, inflammatory infiltration and saliva reduction) are consistent with those of clinical application, the success rate is greater than or equal to 90%, and compared with an existing catheter injection method, the method is high in repeatability, less in interference and suitable for disease mechanism research and drug screening.

The invention discloses a radio frequency closed catheter and a manufacturing method thereof, and relates to the technical field of medical instruments.The radio frequency closed catheter comprises an inner film, the inner film is composed of a left section and a right section, a heating wire is wound on the outer surface of the right section of the inner film, a spiral coil is wound on the outer surface of the left section of the inner film, and the outer surface of the spiral coil is wrapped with a woven mesh; and outer membranes are arranged on the outer surfaces of the woven mesh at the left section and the heating wire at the right section of the inner membrane. Due to the existence of the metal ring net, the catheter is not easy to fold to form creases in use so as to influence use, and compared with an existing catheter adopting a PI (Polyimide) or PEEK (Polyether Ether Ketone) tube design, the whole structure is smaller in bending radius, low in rigidity, easy to push in tortuous veins, large in internal aperture, and capable of supporting thrombus aspiration or passing through other required instruments such as guide wires; meanwhile, the liquid injection function can be achieved through the guide pipe, the low-impedance copper-nickel flat wire heating body is suitable for low-voltage driving equipment, and the safety performance is higher.

The invention discloses a catheter-related complication risk early warning information system based on intelligent AI, and belongs to the technical field of catheter-related complication, and the system comprises a data collection module which is used for collecting multi-modal data of a patient in real time; the data processing module is used for processing the multi-modal data of the patient and determining multi-modal characteristic data of the patient; the risk identification module is used for analyzing the multi-modal characteristic data of the patient and determining a risk identification result of catheter-related complications; and the early warning and intervention module is used for carrying out early warning and intervention on the patient in time according to the catheter related complication risk identification result. The problems that in the prior art, catheter related complication risks cannot be recognized in advance, early warning intervention cannot be conducted in time, catheter use safety is low, and the complication occurrence rate cannot be effectively reduced are solved. The catheter related complication risk can be recognized in advance, early warning intervention can be conducted in time, the use safety of the catheter can be improved, and the complication occurrence rate can be effectively reduced.

The utility model relates to the technical field of urethral catheters, in particular to a urethral catheter assembly of a combined urethral catheter, which comprises a urethral catheter main body, a connecting sleeve is fixedly connected to the outer side of the urethral catheter main body, a closing assembly is arranged in the connecting sleeve, and a catheter head is fixedly connected to one end, far away from the connecting sleeve, of the urethral catheter main body. An air bag is arranged on the outer side of the catheter head and located on the outer side of the catheter body, and a water injection branch pipe is fixedly connected to the end, close to the connecting sleeve, of the catheter body; the closing assembly is used for conducting closing treatment on the interior of the connecting sleeve, the closing assembly is composed of a connecting ring, elastic pieces, a closing block, an elastic moving block and an elastic limiting block, the connecting ring is fixedly connected to the interior of the connecting sleeve, and the multiple sets of elastic pieces are all fixedly connected to the outer side of the connecting ring. Through the design, the overall practicability of the catheter assembly can be improved.

The application provides a catheter reinforcing layer and a catheter, and is applied to the technical field of medical devices. In the catheter provided by the application, compared with the reinforcing layer design of a pure braided structure in the prior art, a new reinforcing layer structure is designed, one or more axial components are introduced into the reinforcing layer of the existing catheter, the modulus of the catheter in the axial direction is increased, and then when an instrument is conveyed in the lumen of the catheter, the axial deformation of the catheter caused by the axial shear stress of the catheter body is avoided, that is, the axial tensile capacity of the catheter is improved, the elongation of the catheter is reduced, and finally the risk of fatigue failure of the catheter caused by the axial stretching of the internal compatible instrument is avoided.

The application discloses an antibacterial catheter and a preparation method thereof, and belongs to the technical field of catheters, and aims to solve the problem of poor antibacterial effect and short duration caused by the poor combination of an antibacterial agent and a thermoplastic polyurethane elastomer after antibacterial treatment of the existing catheter. The antibacterial catheter comprises a pipe body and n antibacterial layers formed on the outer wall of the pipe body in sequence, wherein n is a positive integer; the material of the pipe body is a polyurethane elastomer; the material of the antibacterial layer comprises 100 parts of the polyurethane elastomer and 1-10 parts of an antibacterial agent in terms of mass fraction, and the antibacterial agent is a pyrithione compound. The application can achieve long-term antibacterial effect based on the multilayer antibacterial layer and the hydrogen bond between the antibacterial agent and the polyurethane elastomer.

This utility model discloses a pressure-reducing multi-catheter fixation dressing, comprising a pressure-reducing dressing body and non-woven adhesive tape. A through groove is formed in the middle of the pressure-reducing dressing body; an easy-tear perforated line is provided from the center of the bottom edge of the through groove to the center of the bottom edge of the pressure-reducing dressing body; several strips of non-woven adhesive tape are adhered to the back of the TPU film in the pressure-reducing dressing body. This pressure-reducing multi-catheter fixation dressing has a simple structure and is easy to use. It can conveniently and securely place one or more catheters and is suitable for catheters of different sizes, solving the problem that existing catheter fixation devices are difficult to use with catheters of different sizes. It meets the need for stable fixation of multiple catheters in medical procedures, facilitates the management of multiple catheter lines, and further enhances the fixation stability of the catheters by applying two intersecting adhesive strips to the pressure-reducing gel, preventing slippage. The elasticity of the adhesive strips, adhesive tape, and adhesive tape prevents catheter flattening, making it economical and practical.

The application discloses a kind of distributed optical fiber sensing continuous nerve block catheter system and method, it is related to medical instrument technology technical field.To solve the problem that existing catheter cannot be visualized, cannot identify tissue type, cannot dynamically adjust infusion, the system includes: flexible catheter main body with injection cavity and side hole;Shape sensing optical fiber and force sensing optical fiber buried in pipe wall;Electric control micropump;Signal processing unit.Signal processing unit reconstructs the three-dimensional morphology of catheter based on strain signal, analyzes the waveform characteristics of force signal, determines the contact tissue as nerve, fascia or blood vessel.When contacting nerve, infusion is not more than 30% of maximum infusion rate;When fascia breakthrough, maintain parameters and record coordinates;When adjacent to blood vessel, reduce to zero or not more than 5% and alarm.The system is used for continuous nerve block, realizes hierarchical closed-loop drug delivery, improves catheterization accuracy and drug safety.

The utility model discloses a visual and controllable prostate dilation catheter which comprises a hard main tube and a flexible guide tube. The front water bag and the rear water bag are wrapped outside the main pipe; the first pipeline and the second pipeline are communicated with the front water bag and the rear water bag; the main flushing hole and the front camera module are arranged at the front end of the guide pipe; and the control device is used for controlling the bending direction of the guide pipe. The combination of the hard main pipe and the flexible guide pipe is adopted, the main pipe ensures enough supporting force, and the guide pipe has good bendability; a doctor can easily adjust the direction of the front end of the catheter through the control device, operation is simpler, more convenient and more flexible, the defects that an existing catheter is tedious in operation and high in requirement are remarkably overcome, and accurate intubation is achieved.

The invention relates to the technical field of PICC (peripherally inserted central catheter), and aims to solve the problem that an existing catheter is likely to fall off in the using process. The invention provides a device for solving the technical problems that PICC (Peripherally Inserted Central Catheter) is used for conveying PICC, and obstructions can be incompletely dissolved and incompletely sucked, the device comprises a dredging structure, a catheter and a dredging guide wire, and further comprises a double-layer locking structure arranged at the joint of the dredging structure and the catheter; and the sectional type pressing evacuation structure is arranged on the outer wall of the catheter in a sleeving manner and is connected with the double-layer locking structure. A double-layer locking structure is arranged to lock the blocked connector of the catheter and the three-way pipe, and falling off in the using process is avoided; the blocking objects are pressed and segmented by arranging the segmented pressing and evacuating structure, so that a channel is formed between the blocking objects, a dissolving agent is in full contact with the blocking objects, and the situation that the blocking objects are not completely dissolved and not completely sucked is avoided.

The invention provides an interventional catheter assembly, and belongs to the technical field of medical instruments. The catheter assembly comprises a conveying catheter body, and the conveying catheter body is provided with a first conveying catheter cavity arranged in the axial direction and used for conveying a treatment instrument to a treatment part; a second conveying pipe cavity parallel to the first conveying pipe cavity is further formed in the conveying pipe body, a penetrating hole communicated with the outside is formed in the second conveying pipe cavity, and a supporting micro-catheter is arranged in the second conveying pipe cavity in a sliding mode and used for penetrating into a collateral vessel of the common carotid artery from the conveying pipe body through the penetrating hole. The supporting micro catheter is provided with a positioning component which is used for preventing the conveying catheter body from displacing at the intersection of the common carotid artery and the aortic arch when the treatment instrument is conveyed, so that the position stability of the conveying catheter body is guaranteed when the treatment instrument is conveyed to a treatment part through the first conveying catheter cavity; the catheter is mainly used for solving the technical problem that an instrument is inconvenient to convey due to insufficient supporting performance of an existing catheter.

The utility model relates to the technical field of medical instruments, in particular to a urine collecting device collected through a catheter, which comprises a collecting barrel, a barrel cover is mounted at the top of the collecting barrel, a fixing mechanism is arranged at the top of the barrel cover, and a sealing mechanism is arranged at the top of the barrel cover and above the fixing mechanism. The fixing mechanism comprises a connecting sleeve fixedly connected to the top of the collecting barrel, a clamping block is slidably connected to the interior of the connecting sleeve, and an extrusion block is slidably connected to the outer wall of the clamping block and located in the connecting sleeve. By means of the design that a clamping plate and an adhesive tape in the fixing mechanism enable the clamping plate to clamp an inserted catheter through a pushing structure, the problems that according to an existing catheter collecting device, the outer wall around a sampling part at the near end of the catheter needs to be disinfected firstly, and then an injector is directly used for puncturing into a catheter cavity to collect urine; the sampling part cannot be thoroughly disinfected, and the risk of pricking injury is high.

The application discloses a kind of conduit stereoscopic shaping device and its shaping method, by being arranged in the axial through heating groove, cooling groove and being located in the heart of molding groove on the two end surfaces of stereoscopic plastic device main body, and cooling groove is located in the radial outer side of heating groove, both are spaced apart with multiple along the circumference, condenser or air pipe is installed in cooling groove;Several screw holes for loading adjusting rod are opened on the side wall of stereoscopic plastic device main body, and screw hole passes through heating groove, cooling groove and reaches molding groove and is arranged with multiple layers along the axial direction on the side wall, and each layer screw hole is spaced apart with multiple along the circumference and is equipped with adjusting rod one by one, and adjusting rod is symmetrically distributed in pairs on the side wall, can be adjusted in real time to the molding angle of conduit in molding process, solve the problem that existing conduit molding mold cannot be adjusted again once determined and existing technology can only be plane shaped, so that conduit can be more matched with human body cavity, more easily make conduit reach surgical area quickly.

The invention belongs to the technical field of medical protective clothing, and discloses a protective clothing special for a central venous catheter, which comprises a hospital gown jacket, the front side of the hospital gown jacket is provided with a first opening and a second opening, the first opening of the hospital gown jacket is provided with a cover plate, and the cover plate is used for exposing or covering the first opening; a fixing piece is arranged at the position of the second opening of the hospital gown jacket, one side of the fixing piece is fixedly connected with the upper side of the second opening, the fixing piece is provided with a plurality of child fixing pieces in the width direction of the hospital gown jacket, and the lower side of the second opening is provided with mother fixing pieces matched with the fixing pieces. An elastic band is connected below the second opening; a catheter containing bag is arranged on the inner side of the upper garment of the hospital gown, an opening is formed in the upper portion of the catheter containing bag, and the position of the catheter containing bag corresponds to the first opening and the second opening. The catheter fixing adhesive tape solves the problems that an existing catheter fixing adhesive tape is prone to slipping, poor in pasting stability and prone to adhesive tape anaphylaxis.

The invention discloses an intelligent urine collecting device for urology department nursing, relates to the technical field of medical instruments, and aims to solve the technical problem that a patient is in a pathological urination mode for a long time due to the fact that an existing catheter cannot recognize and intervene detrusor sphincter coordination disorder in real time. One end of the catheter arranged in the bladder is provided with a catheterization port and an annular cavity, and the other end of the catheter is provided with an inflation extension tube communicated with an air source; the annular balloon is formed by expanding the annular cavity under the influence of an inflating medium; the inflating hole is formed in the catheter main body and is used for communicating the inflating extension tube with the annular cavity; the air bag internal pressure sensor is fixed on the inner wall of the annular cavity; a dual-pressure real-time monitoring system is constructed, and pressure change signals of detrusor contraction and sphincter areas in the urination period are accurately collected. The defect that the coordination state of the detrusor muscle and the sphincter cannot be sensed in the prior art is overcome, and therefore the upper urinary tract injury risk is effectively reduced.

The invention relates to the technical field of medical instruments, and provides a catheter driving device of medical equipment and the medical equipment. The catheter driving device of the medical equipment comprises a catheter and a driving component, one end of the catheter is provided with a molding section, the molding section is suitable for bending deformation, the catheter comprises an inner tube and an outer tube, and the inner tube is arranged in the outer tube in a penetrating mode; the far end of the inner tube is fixedly connected with the far end of the outer tube, and the near end of the inner tube extends out of the near end of the outer tube; the driving component comprises a first driving assembly, and the first driving assembly is arranged to drive the inner pipe to move in the axial direction so that the molding section can be bent. By arranging the first driving assembly capable of independently controlling bending and combining the inner and outer tube structure with the molding section, the problems that an existing catheter device is low in degree of freedom and insufficient in control precision are effectively solved, and the catheter device has the advantage that the catheter three-dimensional motion control precision and the operation stability are improved.

The utility model relates to the technical field of medical supplies, in particular to an anti-falling catheter which comprises a catheter body and a urine collecting bag connected to the tail end of the catheter body, a rotary fastening component is movably connected between the catheter body and the urine collecting bag, and one end of the catheter body and one end of the urine collecting bag are respectively inserted into the rotary fastening component. The rotary fastening assembly comprises a connecting sleeve, a buckling piece and a locking piece, a hollow cavity structure is arranged in the connecting sleeve, a liquid level float switch used for detecting the liquid level of the urine collecting bag is arranged in the cavity of the connecting sleeve, and the liquid level float switch is communicated with the connecting port of the urine collecting bag; the buckling piece is detachably connected into a cavity, close to one end of the pipe body, of the connecting sleeve, and a plurality of clamping blocks are circumferentially distributed on the inner wall of the buckling piece. According to the urine bag, the problem that an existing catheter is prone to slipping to cause urine leakage is solved, meanwhile, the catheter can be automatically closed after the urine bag is full of urine, and the problem that urine flows back to cause urinary tract infection is solved.

The invention discloses a surgical catheterization device which comprises an outer tube and a core tube, the outer tube is arranged on the outer side of the core tube in a sleeving mode, a positioning disc is fixed to one end outside the outer tube, a blocking disc is fixed to the outer side of the end, penetrating out of the positioning disc, of the core tube, and a spring is arranged on the outer side, between the blocking disc and the positioning disc, of the core tube in a sleeving mode; the other end of the core pipe is rotationally communicated with an inner pipe, the top end of the inner pipe penetrates out of the outer pipe, and the top end of the inner pipe is communicated with a plug of a hollow structure. The urinary catheter has the advantages that the spring is arranged at the outer end of the outer tube to push the retaining disc to pull the core tube, the plug and the floating bags are kept to abut against the end, stretching into the bladder, of the outer tube, the end opening of the outer tube serving as the urinary catheter is sealed, the retaining disc is pressed during regular urination to relieve the pulling effect of the core tube on the plug, and the urination is facilitated. Impurities in the bladder are discharged outwards along the outer tube through flushing fluid, the defect that an air bag on the outer side of an existing catheter is prone to being attached to urine dirt, and consequently the catheter is difficult to pull is overcome, and practicability is higher.

The invention relates to the technical field of liver segment dyeing devices, in particular to a liver segment dyeing device through a portal vein or hepatic artery path. The device comprises a catheter internally provided with a plurality of cavity pipelines, and the catheter can be used in cooperation with a guide wire to reach the target position of a blood vessel. An inflatable balloon is arranged on the outer wall, close to the insertion end, of the catheter, an inflation channel is formed in the catheter and communicated with the balloon, the input end of the inflation channel is arranged at the end, reserved outside the human body, of the catheter, and a guide wire channel is further formed in the position, located at the insertion end, of the catheter. The guide wire channel is a deformable channel penetrating through the balloon in the direction parallel to the axis of the catheter, when the balloon is in an expansion state, the deformable channel is subjected to closed deformation, an existing catheter provided with the balloon and used for interventional operation is transformed and applied to liver subunit structure dyeing, and therefore the catheter can be applied to liver subunit structure dyeing. The target blood vessel is blocked and the dyeing medicine is injected into the target blood vessel, so that the dyeing success rate of the target liver subunit structure is improved.

The invention relates to the technical field of medical instruments, in particular to a catheter for vascular intervention and a preparation method thereof. The catheter comprises a catheter body, wherein the outer surface of the catheter body is coated with a hydrophilic coating; the catheter body comprises a near-end section and a far-end section; a micro-bulge array is arranged on the outer surface of the near-end section; the far end of each micro-bulge unit in the micro-bulge array is fixedly connected with the tube body, and the near end of each micro-bulge unit in the micro-bulge array is a free end tilting towards the outer side of the tube body; the micro-bulge units are provided with asymmetrical section contours and form a main body inclined surface facing the far end of the catheter; the outer surface of the micro-bulge array and the other outer surfaces of the tube body are continuously covered by the hydrophilic coating; when the near-end section slides relative to a restraining face in the axial direction of the near-end section, the sliding friction coefficient of the near-end section sliding towards the near end is larger than the sliding friction coefficient of the near-end section sliding towards the far end. The technical contradiction between anchoring stability and pushing smoothness of an existing catheter for vascular intervention is solved.

The invention discloses a medical grade PEBAX composite catheter material with low friction and thermal stability, and relates to the field of medical catheter materials, the medical grade PEBAX composite catheter material comprises a base material, and the base material comprises a pre-modified PEBAX base material, a composite functional additive and a ternary photo-thermal stabilizer. According to the medical-grade PEBAX composite catheter material with low friction and thermal stability, the medical-grade PEBAX composite catheter material is prepared through multi-dimensional innovation of base material pre-modification, lubricating-antibacterial synergistic additive design, ternary photo-thermal stabilizer compounding and whole-flow process optimization; the technical problems that an existing PEBAX catheter material is insufficient in lubricity, poor in thermal stability, lack of an antibacterial function and poor in multi-performance synergism are systematically solved. The material has low friction, high thermal stability, long-acting antibacterial property and excellent biocompatibility, all performance indexes are superior to those of the prior art, and the preparation process is suitable for large-scale industrial production, can be widely applied to high-end medical tubes such as interventional catheters and anesthesia catheters, and has remarkable medical industry application value and market prospect.

The application provides a catheter reinforcing layer and a catheter, and is applied to the technical field of medical devices.In the catheter provided by the application, compared with the reinforcing layer design of a pure spring structure in the prior art, a novel reinforcing layer structure is designed, one or more axial components are introduced into the reinforcing layer of the spring structure of the existing catheter, so that the axial modulus of the catheter is increased, axial deformation of the catheter caused by the fact that the pipe body of the catheter is subjected to an axial force is avoided, and the problem of fracture in a serious case is avoided.