56 results about "Existing catheter" patented technology

The utility model discloses a pre-filled syringe for sealing an infusion port tube, which can directly perform tube sealing operation after tube washing through an integrated injection structure, avoids many problems of syringe switching, avoids reverse flow of tube washing liquid or tube sealing liquid in the process, and can assist medical staff in automatically realizing a pulse type injection technique. According to the technical scheme, the catheter flushing device is characterized by comprising a pipe flushing cavity, a pipe sealing cavity and a butt joint opening, the pipe flushing cavity and the pipe sealing cavity are arranged side by side, scale marks are arranged on the outer wall of the pipe flushing cavity and the outer wall of the pipe sealing cavity, the butt joint opening is communicated with the interiors of the pipe flushing cavity and the pipe sealing cavity at the same time and can be connected to the tail end of an existing catheter, and a pipe flushing rod and a first piston are arranged at the pipe flushing cavity; a pipe sealing rod and a second piston are arranged at the position of the pipe sealing cavity, one-way valve structures are arranged between the pipe washing cavity and the butt joint opening, one-way valve structures are arranged between the pipe sealing cavity and the butt joint opening, the device further comprises a limiting piece used for limiting the displacement state of the pipe washing rod, and when the pipe washing rod moves by a specific distance, the limiting piece temporarily limits continuous movement of the pipe washing rod.

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 relates to the technical field of medical auxiliary equipment, in particular to a subclavian venipuncture auxiliary device which comprises a needle cylinder, and a push rod is slidably connected to the inner wall of the needle cylinder; the limiting sliding block drives one end of the needle tube to slide upwards, then the needle tube moves backwards by a certain distance, the needle tube is moved out of a blood vessel, then when the device is not completely pulled out, the position of the needle tube is adjusted, and the needle tube can be pushed again for puncturing; the guide wire I is limited through the inverted cone block, so that the guide wire I can only slide towards one side; a plurality of indwelling tubes can be integrated together through the catheter assembly, the area of the indwelling tubes is reduced, an inner cavity of the installation shell is divided into a plurality of cavities by triangular partition plates, special-shaped protection blocks in all the cavities can achieve different functions, a plurality of existing catheters are integrated into the inner cavity of the deep jugular vein catheter, the area of the device is reduced, and the device is convenient to use. Therefore, the friction force borne by the device attached to the body surface of the patient is small.

The utility model relates to an intracranial drug balloon catheter. The balloon catheter comprises a main catheter body and a plurality of branch catheter bodies, a guide wire opening and an air guide tube opening are formed in the side, away from the branch catheter bodies, of the main catheter body, a guide wire and an air guide tube are inserted into the guide wire opening and the air guide tube opening respectively, and the guide wire and the air guide tube are fixed into the main catheter body and the branch catheter bodies in a penetrating mode respectively. The air guide pipe is communicated with balloons through a plurality of branch air pipes, and the balloons are arranged on the outer walls of the branch air pipes. According to the balloon catheter, the blocking blocks are arranged to block the gas-distributing pipe so as to cut off communication between the gas-distributing pipe and the balloons, the sleeve and the connecting rope are arranged, so that the multiple sets of blocking blocks connected to the connecting rope can be sequentially pulled out of the gas-distributing pipe from the starting end, and the purpose of expanding the number of the balloons is achieved by controlling the moving distance of the sleeve; the problem that an existing catheter cannot adjust the number of expanded balloons according to the length of the lesion position of a patient is effectively solved.

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.

The utility model relates to a catheter fixing patch which solves the problem that when the inner end of a catheter is not fixed, a catheter is prone to slipping in an existing catheter external fixing mode. The fixing paste comprises a ring paste adhesive tape annularly pasted on the penis, the front side edge of the ring paste adhesive tape extends forwards in parallel to form two strip-shaped adhesive tapes, and a strip-shaped plastic soft sheet for clamping the catheter is arranged at the middle line of the back adhesive surface of each strip-shaped adhesive tape. The front ends and the rear ends of the plastic soft sheets of the two strip-shaped adhesive tapes are respectively provided with a plastic clamping ring which can be buckled with each other to hoop the catheter. According to the external fixing device, the catheter of a male patient can be stably and reliably externally fixed, and the catheter is prevented from slipping off; and whether fixation is too tight and whether urine leakage exists can be observed and evaluated at any time while reliable fixation is achieved, and adjustment can be conducted in time.

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 provides a catheter fixer, which relates to the technical field of catheter fixators and comprises a bonding sponge, a fixed base is bonded at the top end of the bonding sponge, a mounting groove is formed in the fixed base, a plurality of guide blocks are mounted on the inner bottom surface of the mounting groove, guide grooves are formed among the guide blocks, and the guide blocks are arranged in the guide grooves. A guide block is arranged on the top end of the fixed base, a pipe outlet groove is formed in the outer side wall of the guide block, a fixed cover plate is arranged at the top end of the fixed base, an upper fixed block is installed on the outer side wall of the fixed cover plate, a sliding groove is formed in the upper fixed block, and a fixed plate is arranged in the sliding groove and extends to the bottom of the upper fixed block. The catheter can be well fixed, and the fixed catheter can be lengthened according to actual requirements, so that the catheter cannot be displaced due to the length after the position of a patient is changed, and the risk of infection is reduced.

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 utility model relates to an exudate drainage component, which comprises a catheter fixing application, the exudate drainage component further comprises an exudate collection bag adhered on the catheter fixing application, a first exudate leakage hole is arranged on the catheter fixing application, and a first rubber ring is arranged at the outer edge of the exudate leakage hole; a second liquid leakage hole is formed in the seepage collecting bag, and a second rubber ring is arranged on the outer edge of the second liquid leakage hole; and after the first rubber ring and the second rubber ring are adhered, the first liquid leakage hole and the second liquid leakage hole correspond to each other and are communicated with each other. The catheter fixing patch solves the problem that an existing catheter fixing patch cannot collect exuded tissue fluid.

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 belongs to the technical field of medical material preparation, and provides CMCS-CuO NPs antibacterial latex and application thereof in a clinical implantable artificial pipeline base material in order to solve the problem that existing catheter or ureteral stent and other pipes implanted into a human body are prone to causing human body infection. The preparation method comprises the following steps: reacting carboxymethyl chitosan with copper sulfate under a hydrothermal condition to obtain a carboxymethyl chitosan composite nano copper oxide CMCS-CuO NPs antibacterial material, and then preparing the CMCS-CuO NPs antibacterial latex from the carboxymethyl chitosan composite nano copper oxide CMCS-CuO NPs antibacterial material and medical natural latex by adopting a blending method. The CMCS-CuO NPs antibacterial latex prepared by the invention is simple in process and low in cost, has an antibacterial effect on six common pathogenic bacteria in the urinary system, is high in biological safety, and can be further used as a base material to develop a novel antibacterial catheter, a ureteral stent tube and the like to be clinically used for helping to solve related infection problems.

The present invention relates to the technical field of ablation catheters, specifically to an endoscopic pancreatic radiofrequency ablation catheter. A plurality of groups of folded air tubes fixed on the arc-shaped inner wall of a heat transfer arc plate are arranged at the upper end of a supporting gas plate. The lower end of the folded air tubes is connected to the inner cavity of the supporting gas plate. An air pump for controlling the airflow in the air tube is arranged in a control handle. The beneficial effects are as follows: by adding an air tube and a heat transfer arc plate to an existing catheter, expansion is achieved by utilizing the air tube, and then the heat transfer arc plates distributed in a circular array are expanded outward, thereby forming intervals at the contact layer position, thereby achieving intermittent heating during circumferential contact heating and drying. At the same time, a heat insulation layer is used to wrap the heating block to reduce the conduction temperature of the catheter, thereby avoiding excessive heating caused by direct contact. In combination with the heat transfer of a heat conductive ring, accurate and convenient temperature control is achieved, thereby greatly reducing the difficulty of operation.

The utility model discloses a conduit fixing frame which comprises a bottom plate and a lifting outer cylinder, telescopic rods are fixed to the left side and the right side of the top end of the bottom plate, a mounting table is fixed to the top ends of the telescopic rods, fixing rings are fixed to the left side and the right side of the top end of the mounting table, and the top ends of the fixing rings are in threaded connection with hand screws. A heating groove is fixed to the middle of the top end of the mounting table, a heating piece is fixed to the inner bottom wall of the heating groove, and a liquid level sensor is fixed to one side of the heating groove. Compared with an existing catheter fixing frame, the catheter fixing frame is provided with the heating mechanism, liquid such as input liquid medicine or nutrient solution can be heated, so that discomfort of a patient caused by low-temperature infusion is avoided, the practicability of the catheter fixing frame is improved, and meanwhile the catheter fixing frame is provided with the electric lifting adjusting mechanism; and the device can be electrically lifted and adjusted, so that the waste of manpower in the adjusting process is reduced, and the convenience of the device is improved.

The invention discloses an antibacterial catheter and a preparation method thereof, belongs to the technical field of catheters, and aims to solve the problems of poor antibacterial effect and short duration caused by untight combination of an antibacterial agent and a thermoplastic polyurethane elastomer after antibacterial treatment of an existing catheter in the prior art. The antibacterial catheter comprises a catheter body and n antibacterial layers sequentially formed on the outer wall face of the catheter body, and n is a positive integer; the pipe body is made of a polyurethane elastomer; the antibacterial layer is prepared from the following materials in parts by mass: 100 parts of polyurethane elastomer and 1-10 parts of antibacterial agent, and the antibacterial agent is a pyrithione compound. Based on the multiple antibacterial layers and hydrogen bond bonding between the antibacterial agent and the polyurethane elastomer, the long-term antibacterial effect can be achieved.

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.

A catheter (100, 200, 600, 700) insertable into a urethra for installation in a user's bladder and urethra, the catheter comprising: a urine conduit (102, 202, 602, 702, 802) comprising a first urine inlet (104, 214, 614, 714, 814) and a urine outlet (106, 206); and an inlet protector (216, 316, 616, 716, 816) extending outwardly from the urine conduit from a position between the first urine inlet and the urine outlet. The inlet protector functions to protect the urine inlet by separating it from contact with the bladder wall and thus keeping it out of contact with tissue. In existing catheters, the process of evacuating the bladder can cause tissue from the bladder wall to be sucked into the urine inlet. Tissue can get stuck to the catheter which blocks the inlet and tissue can also be damaged by this process. Also, small pieces of tissue can lodge within the catheter causing blockage and biofouling, reducing flow rate. A high flow rate is better as it flushes any fouling or urine deposits out of the catheter. A lower flow rate is less effective so that deposits build up quicker and present a greater infection risk, thus reducing the time that the catheter can remain in place. The inlet protector which extends outwardly from the urine conduit from a position between the urine inlet and the urine outlet (i.e. so that the urine inlet is held away from the urethra and the urethral opening of the bladder) keeps the urine inlet slightly separated from the bladder wall tissue and thus ensures a good flushing flow rate with reduced risk of fouling.

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 utility model relates to the technical field of medical instruments, in particular to a catheter sheath which comprises a guide wire, an expander and a sheath tube, the guide wire is used for being inserted into a human body, the expander sleeves the guide wire, the expander is provided with a first fixing part, the sheath tube sleeves the expander, the sheath tube is provided with a second fixing part, the first fixing part is detachably mounted in the second fixing part, and the second fixing part is detachably mounted in the second fixing part. And the dilator and the sheathing canal are guided by the guide wire to penetrate into a human body. The catheter sheath solves the problem that when an existing catheter sheath penetrates into the body of a patient, the dilator rotates and the sheath tube does not rotate along with the dilator, so that the dilator and the sheath tube cannot continue to penetrate into the human body, it is ensured that the sheath tube and the dilator can smoothly penetrate into the human body, and a channel for a surgical instrument to penetrate into the human body for surgical operation is established through the sheath tube subsequently.

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.

A guide wire configured for use with existing catheter mapping and navigation systems. The guide wire is made of electrically conductive material and coated in an electrically insulating material. An uncoated region is provided near the guide wire's distal tip. This uncoated region forms a conductive path between the metallic components of the guide wire and the surrounding tissue. The uncoated region effectively becomes an electrode for use in prior art mapping and navigation systems. The mapping and navigation system determines the position of the uncoated region.

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.