39 results about "Intravenous tubes" patented technology

The invention relates to the technical field of blood purification, and particularly discloses an integrated blood purification pipeline consumable device which comprises a main body bracket, and an artery pipeline assembly, a dialysis filter, a vein pipeline assembly, a pre-flushing piston assembly, a liquid inlet tank assembly and a liquid outlet tank assembly which are mounted on the main body bracket. The key core problem solved by the invention is to integrate treatment consumable pipelines and integrate a plurality of auxiliary function modules, so that the operation convenience of medical staff is greatly improved on the premise of ensuring treatment; by configuring an automatic pre-flushing function, a heparin injection function, a quantitative system and the like, the operation process of ultralight portable blood purification equipment matched with the device can be simplified, the size and the weight of the equipment are reduced, and the equipment is suitable for wider and more complex application environments; the method can be used for early treatment of severe wounded persons in modern wars, emergency supplement of conventional dialysis treatment patients, disaster relief without traditional dialysis conditions, self-treatment of patients in emergencies and the like, and has wide application prospect and practical value.

The utility model discloses a double-bubble monitoring choke clip for a hemodialysis machine, which comprises a mounting part mounted on the outer surface of the hemodialysis machine, and the mounting part is provided with an artery pipeline channel for placing an artery pipeline and a vein pipeline channel for placing a vein pipeline. The artery pipeline channel and the vein pipeline channel penetrate through the mounting part, monitoring probes used for monitoring whether bubbles are generated in the artery pipeline or the vein pipeline are arranged on the inner wall of the artery pipeline channel and the inner wall of the vein pipeline channel, and chucks used for clamping the artery pipeline or the vein pipeline are arranged in the artery pipeline channel and the vein pipeline channel. The artery pipeline and the vein pipeline can be monitored at the same time, and monitoring is comprehensive.

The invention discloses a method and equipment for monitoring lower limb vein deformation and blood flow based on an M-type ultrasonic technology, and the method comprises the steps: carrying out the M-type ultrasonic scanning of the lower limb skin of a user in a motion state in a preset sampling line direction through a flexible patch type ultrasonic probe; based on a preset grayscale signal gradient condition and a region-of-interest extraction condition, converting the scanned M-type ultrasonic image into a grayscale image, extracting a region-of-interest from the grayscale image, marking a low-pixel line segment representing a blood vessel envelope region in the region-of-interest as a'dark line ', d-type ultrasonic waves of a flexible patch type ultrasonic probe are used for measuring an optimal sampling line of a dark line, integration is carried out on deformation of the dark line along with time, the part between two adjacent waveforms in an obtained broken line graph is marked as a dark area, integration is carried out on changes of the edge and the internal pixel value of the dark area along with time, and the optimal sampling line of the dark line is obtained. And outputting a motion waveform image of the depth positions of the vein tube wall and the vein valve along with the time change, and calculating the vein deformation quantity of the lower limb muscles.

The utility model belongs to the technical field of medical teaching models, and particularly discloses a simulation limb arteriovenous hemorrhage simulation device which comprises a simulation blood storage device and a simulation limb, a blood pressure circulation control box is arranged between the simulation blood storage device and the simulation limb, and the simulation blood storage device is connected with the blood pressure circulation control box through a liquid extraction pipe. An artery tube set used for simulating artery blood supply and blood overflow and a vein tube set used for simulating vein blood supply and blood overflow are arranged in the simulation limb, and a liquid outlet of the blood pressure circulation control box is communicated with a backflow opening of the simulation blood storage device and an artery blood outlet in the simulation limb through the artery tube set. Or the liquid outlet of the blood pressure circulation control box is communicated with the backflow port of the simulation blood storage device and the vein bleeding port on the simulation limb through the vein tube group. According to the utility model, the artery tube group and the vein tube group are arranged in the simulation limb, so that blood pressure changes in different states, including arterial high-pressure bleeding, vein low-pressure errhysis and other scenes, are simulated, and the sense of reality of training is enhanced.

The application provides a blood viscosity detection method, device and equipment. The blood viscosity detection method comprises the following steps: inputting a replacement fluid to a vein pipeline through a hard pipeline at a first flow rate, and determining a first inlet and outlet pressure difference of the hard pipeline; determining the viscosity of the replacement fluid according to the pipeline attribute of the hard pipeline, the first flow rate and the first inlet and outlet pressure difference; if the difference between the viscosity of the replacement fluid and the viscosity of water is within a first preset range, then determining a viscosity coefficient according to the viscosity of water, the first flow rate and the first inlet and outlet pressure difference; performing dialysis on blood, and determining the second flow rate of the blood in the hard pipeline after dialysis and the second inlet and outlet pressure difference of the hard pipeline in real time; and determining the real-time viscosity of the blood during dialysis according to the viscosity coefficient, the second flow rate and the second inlet and outlet pressure difference. The application solves the problem that the blood viscosity cannot be detected during hemodialysis treatment in the prior art.

The application relates to the technical field of indwelling needles, and discloses an indwining needle capable of preventing blood backflow, which comprises a venous tube, a filling pipeline fixedly connected to the top of the venous tube, a hose fixedly connected to the outside of the filling pipeline, a mixed liquid tube fixedly connected to one end of the hose, a transfusion tube fixedly connected to one end of the mixed liquid tube, a heparin cap fixedly connected to the other end of the mixed liquid tube, a drainage ball movably connected between the filling pipeline and the hose, and second anastomosis walls for anastomosing the drainage ball formed by the concave shapes of the two sides of the replacement ring, a drainage hole arranged on the drainage ball, the filling pipeline communicated with the hose through the drainage hole, and a three-labium sealing plate movably connected to the inside of the filling pipeline. The indwining needle capable of preventing blood backflow is characterized in that blood in the hose flows into the inside of the filling pipeline, and when the liquid level in the inside of the filling pipeline drops, the three-labium sealing plate slowly drops to re-contact the drainage ball, so that the channel between the filling pipeline and the hose is closed, thereby preventing the possibility of blood backflow in the pipeline.

The invention discloses a hemodialysis tube fixing device with a temperature compensation function. The hemodialysis tube fixing device comprises a fixing base, a base, two sets of clamping jaws, two rotary knobs, a transmission assembly, an electric heating piece and a display screen. The electric heating pieces are arranged on the inner sides of the clamping jaws and used for temperature compensation, the fixing base and the base are connected through an intermittent rotating movement mechanism, and the two rotary knobs can control the two sets of clamping jaws to be opened independently through transmission assemblies. According to the clamping device, an artery pipeline and a vein pipeline in a hemodialysis pipeline can be clamped separately, and operation is more convenient, faster and simpler; in addition, the fixing seat and the base are connected through the intermittent rotation movement mechanism, relative deflection between the fixing seat and the base can be achieved, rotation and stop can be achieved at any time, good controllability and convenience are achieved, the device can be suitable for different patient body positions, and pipeline folding, traction and slipping are prevented.

The utility model provides a hemodialysis catheter fixing device, and relates to the technical field of hemodialysis catheter fixing devices, the hemodialysis catheter fixing device comprises a fixing plate, a fixing structure is arranged on the fixing plate, the fixing structure is mainly composed of two first limiting blocks, the two first limiting blocks are both arranged on the fixing plate, and the first limiting blocks are arranged on the fixing plate. A first limiting block is arranged on the base, a rotating shaft is rotationally connected to the first limiting block, a second limiting block is fixedly connected to the rotating shaft, rubber blocks are fixedly connected to the first limiting block and the second limiting block, a connecting block is fixedly connected to the first limiting block, and a connecting groove is formed in the second limiting block; the hemodialysis catheter fixing device solves the problem that the hemodialysis catheter between a hemodialysis instrument and a patient naturally falls down under the action of gravity and scatters on the ground due to the fact that an existing hemodialysis catheter is usually directly fixed on the hemodialysis instrument, a venous catheter and an arterial catheter are prone to being wound, and the hemodialysis effect is affected.

The invention relates to the technical field of medical instruments, and discloses a deep vein pipeline fixing device which comprises an adjustable clamping and fixing mechanism and an adsorption type fixing mechanism. The air suction shell is fixedly installed on the top of the upper clamping ring, and the interior of the air suction shell is of a hollow structure; the second piston plate is placed in the air suction shell and can generate negative pressure suction force; and the second spiral spring can generate elastic pre-tightening force on the second piston plate. According to the deep vein pipeline fixing device, a pipeline can be fixed to the body position of a patient, so that the flexible movement function of the pipeline is guaranteed, in addition, the deep vein pipeline is clamped and fixed through the arc-shaped clamping plates, then the pipeline is fixed in an adsorption mode through gas suction force, and therefore the fixing strength of the deep vein pipeline is improved; therefore, the external anti-interference capability of the pipeline fixing device is ensured.

The utility model relates to the technical field of medical treatment, in particular to a disposable internal arteriovenous fistula puncture blood taking needle which comprises an internal arteriovenous fistula puncture needle, a pipeline, a check valve and a catheter connecting piece. The internal arteriovenous fistula puncture needle is mounted at the front end of the pipeline, and a needle handle is arranged on the internal arteriovenous fistula puncture needle; the check valve is mounted on the pipeline; the guide pipe connecting piece is installed at the tail end of the pipeline, and the guide pipe connecting piece is sleeved with a protective sleeve. According to the disposable internal arteriovenous fistula puncture blood taking needle, the design that the puncture needle, the pipeline, the check valve and the catheter connecting piece are combined is adopted, the catheter connecting piece is connected to the tail end of the pipeline, and blood taking operation can be directly conducted; after blood sampling is completed, the pipeline is connected with the dynamic and static vessel pipeline; blood does not need to be drawn by using an injector and then sub-packaged into each blood collection tube, so that the pollution risk is reduced; operation is convenient, and working efficiency is improved.

The internal arteriovenous fistula postoperative exerciser comprises an arm support and an exercise ball, the arm support is a cube in the shape of a right trapezoid, an arm positioning groove is formed in the arm support in a sunken mode, and the arm positioning groove comprises an inclined part and a horizontal part; the exercise ball is provided with a mounting hole, the fixing shaft penetrates through the mounting hole of the exercise ball, and the two ends of the fixing shaft are connected with the arm support, so that the exercise ball is positioned in the horizontal part of the arm positioning groove; during use, the arm of a patient is located in the inclined part of the arm positioning groove, the palm of the patient is located in the horizontal part of the arm positioning groove, and the palm center of the palm of the patient faces upwards and just holds the exercise ball. According to the utility model, the exercise enthusiasm of a patient can be improved, the arm blood circulation effect is better, the patient can complete the exercise task according to quality and quantity, the exercise effect is ensured, the arm blood circulation is promoted, the purposes of expanding and thickening the vein wall are achieved, and the vascular access can meet the use requirement during hemodialysis as soon as possible.

A spiral end head hemodialysis catheter comprises a catheter body, a partition, a venous lumen, an arterial lumen, and side openings at one end of the venous lumen and the arterial lumen, a spiral plate body is arranged at the distal end of the partition, both sides of the spiral plate body are integrally connected with the inner side of the catheter body, and venous spiral cavities and arterial spiral cavities are formed at the end of the catheter body; spiral side holes are arranged on the side walls of the catheter body at the inner ends of the two side cuts, and the two spiral side holes are respectively communicated with the venous lumen and the arterial lumen; the spiral plate body forms a spiral support structure on the inner wall of the catheter, increases the support area of the partition on the inner wall of the catheter, improves the kink resistance and fracture strength of the catheter tip, and makes the catheter have stronger stability in the vein; the spiral side holes arranged at the venous lumen and the arterial lumen form a long opening structure, improve the blood flowability, and the spiral side holes can produce spiral guiding effect, reduce blood accumulation, make blood inflow and outflow more smooth, and effectively reduce thrombus formation.

An embodiment provides an adjustable intravenous (IV) securement band with non-occlusive retention in case of excessive force (i.e., automatically loosens) and traction for securing an IV to a patient's arm. Embodiments may further include features such as guides and or channels on the band to hold tubing. Embodiments may be secured to patients to be used as a non-adhesive securement aid for tubing / catheter (e.g., IV's, enteral tubes, Foley catheters, endotracheal tubes, nasogastric (NG) tubes, chest tubes, and the like) retention on patients. An embodiment includes a series of separable flaps, any of which may be separated from the band to adjust the length of the band.

Presented is an airway organ bioreactor apparatus, and methods of use thereof, as well as bioartificial airway organs produced using the methods, and methods of treating subjects using the bioartificial airway organs. The bioreactor comprises: an organ chamber: an ingres line connecting the organ chamber and a reservoir system and comprising an arterial line, a venous line and a tracheal line; an egress line connecting the chamber and the reservoir system, pumps in ingress and egress lines; a controller to control fluid exchange; a chamber pressure sensor connected to the organ chamber.

An apparatus and method are disclosed for detecting the disconnection of a vascular access device such as a needle, cannula or catheter from a blood vessel or vascular graft segment. A pair of electrodes is placed in direct contact with fluid or blood in fluid communication with the vascular segment. In one embodiment, the electrodes are incorporated into a pair of connectors connecting arterial and venous catheters to arterial and venous tubes leading to and from an extracorporeal blood flow apparatus. Wires leading from the electrodes to a detecting circuit can be incorporated into a pair of double lumen arterial and venous tubes connecting the blood flow apparatus to the blood vessel or vascular graft. The detecting circuit is configured to provide a low-voltage alternating current signal to the electrodes to measure the electrical resistance between the electrodes, minimizing both the duration and amount of current being delivered. Detection of an increase in electrical resistance between the electrodes exceeding a pre-determined threshold value may be used to indicate a possible disconnection of the vascular access device.

The simulation model comprises a box body, a supporting rod is arranged in the middle of the upper portion of the box body, a movable block is connected to the upper end of the supporting rod in a sleeved mode, one side of the movable block is movably connected with an installation block, one side of the installation block is fixedly connected with a connecting rod, and the connecting rod is fixedly connected with the box body. The side, away from the mounting block, of the connecting rod is fixedly connected with the model body, a mounting groove is formed in the side, away from the connecting rod, of the model body, a vein puncture module is fixedly mounted in the mounting groove, a simulation vein tube is arranged in the vein puncture module, and a through hole matched with the simulation vein tube is formed in the model body. The height and the angle of the simulation model can be adjusted according to the condition of a user, the simulation venous tube part is convenient to replace, and the use cost is effectively reduced while the practicability is improved.

An intravenous (IV) tube flushing device for safely delivering medication flush without risk of accidental over-administration comprises multiple embodiments of a normally-closed system that prevents uncontrolled fluid flow. One embodiment comprises a spring-loaded push-button valve that temporarily opens to allow flow only while depressed by the user. Upon release, the valve immediately returns to its closed position, eliminating the risk of forgotten open clamps. In another embodiment, the device combines traditional roller clamp functionality with an integrated flush mechanism, featuring a hinged clamp design, wherein IV tubing is secured in a channel with multiple contact points. A spring-biased roller element provides variable flow control, while a pivotable flush actuator temporarily withdraws the roller element to allow unobstructed flow for flushing operations. Both embodiments address the critical safety issue of accidental IV fluid over-administration that can occur when healthcare providers forget to close roller clamps after flushing medication from IV lines.

The application provides a vena cava cannula assembly, relates to the technical field of medical devices, and is used for improving the safety of heart surgery. The vena cava cannula assembly comprises a vein pipe body, the vein pipe body has an insertion end and an extracorporeal end in communication, a positioning ring is slidably connected with the vein pipe body, and an umbrella-shaped clamping ring is slidably sleeved on the vein pipe body and located on one side of the positioning ring close to the insertion end. An opening is arranged on the side wall of the umbrella-shaped clamping ring, the umbrella-shaped clamping ring surrounds a clamping space, one side of the clamping space towards the insertion end is provided with a clamping port, and the opening is in communication with the clamping space. Thus, the positioning ring can be prevented from falling off, so that a medical accident can be avoided, and the safety of surgery is improved. Meanwhile, the insertion part of the vein pipe body can be tightened through the sliding of the umbrella-shaped clamping ring, so that a hemostatic effect of preventing blood from flowing out due to a heart wall tear can be achieved, and the surgery efficiency is improved.

In one aspect a medical fluid connector functions as both a recirculation connector to connect arterial and venous lines during priming of an extracorporeal blood circuit as well as a clamp to occlude a fluid tube. In one aspect, the connector includes a tubular body with luer connections and a clamping arm that extends longitudinally along a tubular body to apply clamping force.

An electronic tag includes a housing; a processor within the housing; a transceiver configured within the housing and coupled to the processor; a display coupled to the housing and the processor and configured to display information received via the transceiver; a clamping mechanism coupled to the housing and configured to secure the electronic tag to an intravenous (IV) tube; and a sensor configured within the housing and configured to measure a property of a fluid in the IV tube at a location of the clamping mechanism.

The invention relates to the technical field of atrial shunts, and particularly discloses an atrial shunt in-vitro simulation model which comprises an esophageal ultrasonic probe, a pipeline and an ultrasonic probe, the tail ends of the esophageal ultrasonic probe and the pipeline are connected with a pleuroperitoneal cavity simulator, and monitoring cameras are symmetrically arranged in the pleuroperitoneal cavity simulator; an individualized 3D printing heart model established based on patient imaging data is installed in the thoracic and abdominal cavity simulator, and a vein pipeline is installed on one side of the surface of the 3D printing heart model. According to the in-vitro simulation model for the atrial shunt, the 3D printing heart model and the pleuroperitoneal cavity simulator are arranged, a highly-reduced individualized and repeatable operation training scene is provided for surgeons, medical students and engineers, the actual clinical operation risk is remarkably reduced, the core operation process of atrial shunt implantation can be completely simulated, and the operation efficiency is improved. Meanwhile, a monitoring camera in the pleuroperitoneal cavity simulator, an esophageal ultrasonic probe and a pipeline can feed back operation details in real time, and the operation success rate is increased.

The utility model discloses a scalp venipuncture training device which comprises a fixing base and a head model, an adjusting mechanism used for adjusting the body position of the head model is arranged on the fixing base, and a shaking mechanism used for simulating struggling of children is arranged between the adjusting mechanism and the head model. A vein pipe network for simulating veins of children is embedded in the surface of the head model, red liquid with certain pressure is arranged in an inner cavity of the vein pipe network, and the head model is detachably sleeved with a scalp layer; according to the scheme, the adjustment of vertical, horizontal, pitching, inclined and other body positions of the head model can be realized through the adjusting mechanism, so that the body positions of the head of a child when different positions of the scalp are punctured can be simulated more truly; according to the scheme, the shaking mechanism can drive the head model to deflect and shake, so that the struggling response of the head of a child can be simulated more truly.

The utility model relates to the technical field of waterproof instruments for deep vein canals, and provides a protection instrument for a subclavian semi-permanent deep vein canals, which comprises a bag body, a puncture tube opening, two arteriovenous fixing parts and a bonding part, the bag body is provided with a waterproof cavity and a contact surface facing a puncture part, the two arteriovenous fixing parts are arranged in the waterproof cavity, and the bonding part is arranged in the waterproof cavity. The bonding part is arranged on the contact surface, and the bonding part and the two arteriovenous fixing parts are oppositely arranged on the bag body. By arranging the two arteriovenous fixing parts, the vein tube and the arterial tube can be respectively fixed on the bag body, and the bonding part and the two arteriovenous fixing parts are oppositely arranged on the bag body, so that the two arteriovenous fixing parts and the bonding part are relatively static, and the vein tube and the arterial tube are indirectly fixed on the skin of a patient through the bonding part; when a patient takes a bath, even if the motion range is too large, the venous catheter and the arterial catheter cannot shake relative to the patient or even impact the bag body, the venous catheter and the arterial catheter are not prone to being separated from the bag body, and safety is achieved.

An example medical system includes a hemodialysis device configured to receive blood from vasculature of a patient via an arterial line and to deliver blood to the vasculature of the patient via a venous line. The medical system includes a hematocrit sensor configured to generate a signal indicative of a hematocrit level of blood in at least one of the arterial line or the venous line. The medical system also includes processing circuitry configured to determine a change in blood volume of the patient over time based on the signal indicative of the hematocrit level, determine a threshold blood volume reduction over time for the patient, compare the change in the blood volume of the patient over time to the threshold blood volume reduction over time, and based on the comparison, generate an indication of vascular access recirculation.

The utility model discloses a double vein pipeline for hemodialysis, which belongs to the technical field of hemodialysis, and comprises an auxiliary pipe and a protective sleeve, the left side surface of the auxiliary pipe is fixedly connected with an external pipe, and the surface of the external pipe is fixedly connected with a working pipe; the protective sleeve is movably arranged on the surface of the working pipe; the auxiliary block is fixedly connected to the surface of the working pipe, and a through hole is formed in the surface of the auxiliary block. According to the double-vein pipeline for hemodialysis, when a working pipe does not need to be used, the working pipe can be covered with a protective sleeve, during specific operation, a connecting rod is inserted into a through hole, at the moment, a limiting block can move in the direction of extruding a first spring, and when the limiting block crosses the through hole, the limiting block pops up under the action of the first spring, so that the working pipe is not required to be used; and at the moment, the limiting block enables the protective sleeve not to fall off from the surface of the working pipe, and the protective sleeve covers the tail end of the working pipe, so that the working pipe is not damaged and polluted.

The utility model belongs to the technical field of intravenous catheterization, concretely is intravenous catheterization auxiliary fixer, including the restraint band, the inner wall fixedly connected with positioning assembly of restraint band, positioning assembly includes rigid protection board, first support plate and second support plate, one end of rigid protection board is fixedly connected with first support plate, is equipped with first clamping groove and second clamping groove on the lateral wall of first support plate, is equipped with pipeline slot on the lateral wall of first support plate, pipeline slot penetrates first clamping groove and second clamping groove, the inside of pipeline slot penetrates the intravenous pipeline, the outside of intravenous pipeline is sleeved with first positioning sleeve and second positioning sleeve, first positioning sleeve is located the inside of first clamping groove, second positioning sleeve is located the inside of second clamping groove. The utility model will be around the restraint band of patient's limbs and be fixedly connected, and the positioning sleeve is positioned by the clamping groove on the support plate and is blocked, so that the pipeline will not move easily, improves the stability of pipeline.

The utility model discloses a vein ECMO tube puncture auxiliary instrument which comprises a front fixing device, a rear fixing device and a sealing bag, the front fixing device and the rear fixing device are sealed through the sealing bag, and a vein ECMO tube sequentially penetrates through the rear fixing device, the sealing bag and the front fixing device. The front fixator and the rear fixator are sealed through the sealing bag, and the vein ECMO tube is sealed in the sealing bag, so that in the puncture adjustment process of the vein ECMO tube, the part, in vitro, of the vein ECMO tube is sealed through the sealing bag, environmental pollution is avoided, the infection possibility is reduced, and the operation effect is improved.

An intravenous (IV) tube flushing device for safely delivering medication flush without risk of accidental over-administration comprises multiple embodiments of a normally-closed system that prevents uncontrolled fluid flow. One embodiment comprises a spring-loaded push- button valve that temporarily opens to allow flow only while depressed by the user. Upon release, the valve immediately returns to its closed position, eliminating the risk of forgotten open clamps. In another embodiment, the device combines traditional roller clamp functionality with an integrated flush mechanism, featuring a hinged clamp design, wherein IV tubing is secured in a channel with multiple contact points. A spring-biased roller element provides variable flow control, while a pivotable flush actuator temporarily withdraws the roller element to allow unobstructed flow for flushing operations. Both embodiments address the critical safety issue of accidental IV fluid over-administration that can occur when healthcare providers forget to close roller clamps after flushing medication from IV lines.

The utility model discloses a simulation device for cardiac ultrasound training, which comprises a shell and a heart model, the heart model is provided with a vein tube, a pulmonary artery tube, a pulmonary vein tube and an aortic tube, and the pulmonary artery tube and the pulmonary vein tube are both provided with branch blood vessels. A first water tank, a second water tank, a first circulating device and a second circulating device are arranged in the shell, and the first circulating device enables water in the first water tank to sequentially pass through the venous duct, the pulmonary artery duct and a branch blood vessel on the pulmonary artery duct and return to the first water tank. According to the simulation device for cardiac ultrasonic training, pulsation adjustment can be achieved by controlling work of the two pump bodies so as to simulate beating of the heart at different frequencies, meanwhile, simulation of states such as arrhythmia is supported, the function design of the simulation device can be met for complex control requirements, and the whole device is simple in structure, small in size, low in cost and convenient to use. The flow control requirement can be met, and use is convenient.

The utility model discloses a catheter fixing device which comprises a venous catheter, a right clamping plate is arranged outside the right end of the venous catheter, a left clamping plate is arranged outside the left end of the venous catheter, the venous catheter is clamped between the right clamping plate and the left clamping plate, and a connecting base is connected to the lower end of the right clamping plate and the lower end of the left clamping plate in a clamped mode. The lower end of the connecting base is fixedly connected with the pasting patch, the connecting base is fixedly connected to the center of the upper end of the pasting patch, the protective layer is pasted to the lower end of the pasting patch, the right clamping plate and the left clamping plate which can rotate relatively are adopted, the clamping rotating groove and the clamping rotating shaft are connected, and it is guaranteed that a venous catheter can be smoothly put in and taken out; the upper sides of the clamping plates are fixed through cooperation of the fixing clamping heads and the fixing clamping grooves, stable clamping and fixing of the vein tubes in the using process are guaranteed, the inner wall limiting inserting grooves and the limiting rods are designed, elastic pre-tightening cloth liners are matched, the clamping force of the vein tubes is enhanced, the vein tubes are prevented from loosening between the clamping plates, and the fixing effect is guaranteed.