27 results about "Arterial catheter" patented technology

The invention provides a dialysis catheter based on a swirl flow technology, and relates to the field of dialysis catheters.The dialysis catheter comprises a connecting mechanism, the connecting mechanism comprises a connecting block, a vein connecting pipe and an artery connecting pipe, and a catheter mechanism is arranged at the bottom of the connecting mechanism; the catheter mechanism comprises a venous catheter, a venous side hole, an arterial catheter, an arterial side hole and a spiral flow induction unit, the inner wall and the outer wall of the catheter mechanism are each provided with a nano-coating mechanism, and each nano-coating mechanism comprises a copper nano-particle coating and a black phosphorus nano-coating. By arranging the spiral flow inducer, blood pressure is rotated, the wall surface shear stress of the inner wall of an artery cavity is improved, the risk of thrombus generation is reduced, wall suction is effectively prevented by arranging the vein side hole and the artery side hole, and the thrombus generation risk is reduced. Through cooperation of the copper nanoparticle coating, the black phosphorus nano coating and the graphene oxide coating, the coating has multiple antibacterial mechanisms such as contact sterilization, ion interference, oxidative stress induction and the like.

The invention relates to the technical field of medical instruments, and provides an arterial cannula for VA-ECMO, a preparation method and a VA-ECMO system comprising the arterial cannula, the arterial cannula comprises a catheter provided with a liquid guide cavity, the catheter is connected with a guide conical head, a supporting spring is sleeved with the catheter, and a plurality of metal rings are arranged in the middle of the supporting spring close to the end of the guide conical head at intervals; at least one liquid outlet hole is formed in each metal ring and the side wall, corresponding to the metal pipe, of the guide pipe; a sealing plug is arranged between the guide conical head and the end of the supporting spring, the guide wire can pass through the sealing plug, and blood cannot pass through the sealing plug. The multiple metal rings are arranged in the middle of the supporting spring close to the guide conical head end at intervals, the rigidity of the position, provided with the liquid outlet hole, of the catheter is improved through the metal rings, and then machining of the liquid outlet hole of the catheter is facilitated; the supporting spring and the developing metal ring are matched to ensure that the outer-layer tube does not collapse during thermal shrinkage, and meanwhile the clinical usability of the arterial cannula is met.

The utility model discloses a needle holder, which relates to the technical field of medical instruments and comprises a connector, a catheter and a tail needle, the connector comprises a puncture needle and a needle holding portion, the needle holding portion is made of transparent medical plastic materials, is cylindrical and is provided with a U-shaped through opening, the puncture needle is arranged inside the needle holding portion, the tail of the connector is connected with the catheter, and the tail of the connector is connected with the catheter. And the other end of the catheter is connected with a tail needle for puncturing the vacuum blood collection tube. The connector is connected with the blood sampling window of the peripheral arterial duct, the puncture portion is wrapped by the needle holding portion arranged outside the puncture needle, the puncture needle can be isolated, hands of medical staff can be protected, pricking risks are reduced, meanwhile, the U-shaped opening can be used for clamping the ducts at the two ends of the blood sampling window, the connector is fixed to the blood sampling window, and the puncture needle is convenient to use. The tail needle is connected with different vacuum blood collection tubes to collect arterial blood samples of a patient for many times, the number of times of puncture is reduced, and errhysis caused by the fact that the rubber plug in the blood collection window loses barrier capacity due to multiple times of puncture is 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 constant-pressure perfusion device comprises a bottom plate, a first lead screw, a second lead screw and a third lead screw are arranged on the two sides of the top of the bottom plate and the rear end of the center of the bottom plate respectively, the tops of the first lead screw, the second lead screw and the third lead screw are all connected with adjusting knobs, and a lifting seat is arranged at the position, close to the top, of the surface of the first lead screw. A first lifting frame is in threaded connection with the top of the surface of the second lead screw, and a second lifting frame is in threaded connection with the bottom of the surface of the third lead screw. According to the constant-pressure perfusion device for improving the in-vitro frog heart, through the design of a first lead screw, a second lead screw, a third lead screw, a lifting seat, a first lifting frame, a second lifting frame, a guide rod and an adjusting knob, an experimenter can rotate the adjusting knob according to the thread transmission principle, so that the lifting seat and the first lifting frame move up and down along the lead screws; therefore, the purpose of accurately controlling the heights of the liquid storage bottle, the frog heart, the venous cannula and the arterial cannula is achieved, the adjusting mode is high in accuracy, and the experiment efficiency and accuracy are improved.

The arterial access system includes an arterial catheter and a catheter assembly having an access port. A blood collection device is coupled to the access port, and the blood collection device includes a catheter tube, a housing having a distal end portion that movably receives the catheter tube and can be coupled to the catheter assembly, and a forward member configured to move the catheter tube between a first position and a second position so that the distal end of the catheter tube is positioned distal to the arterial catheter. A collection device is located proximal to the housing and is in fluid communication with the catheter tube so that, with the catheter tube in the second position, the collection device directly collects a sample of arterial blood through the catheter tube.

An arterial cannula for ECMO includes a main arterial cannula with an inner wall and having a first end with a blood outflow port. The first end is intended to be introduced into an artery so as to inject the blood retrogradely into the artery. A retro-perfusion cannula is configured to be translatably movable between a retracted position in the first end of the main arterial cannula and a deployed position at least partly outside the main arterial cannula and opposite the blood outflow port of the main arterial cannula.

The invention relates to the technical field of medical blood detection, in particular to an arterial blood sampling backflow anticoagulation system and device, which comprises a heparin infusion tube and a four-way assembly, the four-way assembly is connected with the heparin infusion tube, the four-way assembly comprises a main pipeline, the heparin infusion tube is communicated with one end of the main pipeline, the other end of the main pipeline is provided with an arterial duct, and the arterial duct is connected with the four-way assembly. A sampling pipe and a blood storage pipe are arranged on the two sides of the main pipeline respectively, a sampling protection assembly is arranged on the sampling pipe, and the blood storage pipe is connected with a blood drawing storage assembly; the four-way function of heparin input, arterial blood introduction, pure blood collection and mixed liquid temporary storage is integrated through the four-way assembly, additional pipeline switching is not needed, automatic operation of the blood drawing storage assembly is matched, the waste problem that in traditional operation, blood is discarded to avoid heparin interference is thoroughly avoided, blood drawing detection depends on the light sensation module and the quality collection module, and the detection efficiency is greatly improved. The suction and transfusion volume is accurate and controllable, the safety and the blood saving effect are both considered, and the device is particularly suitable for critical patients with high-frequency blood sampling.

A method for neonatal monitoring includes catheterizing a neonatal patient via an implanted umbilical interface, infusing a signaling fluid into the neonatal patient via the neonatal PiCCO venous catheter, monitoring circulating blood for a hemodynamic signal via the neonatal PiCCO arterial catheter, and detecting the hemodynamic signal. Catheterizing the neonatal patient via the implanted umbilical interface includes inserting the neonatal PiCCO arterial catheter into an umbilical artery of the neonatal patient and inserting the neonatal PiCCO venous catheter into an umbilical vein of the neonatal patient.

The utility model discloses an arterial indwelling catheter pasting film, which belongs to the technical field of indwelling catheter pasting films and comprises a main pasting film used for fixing an arterial indwelling catheter, an auxiliary pasting film used for being fixed at the position of a thumb in a wing type crossed mode, an auxiliary pasting film used for being adhered to the surface of skin in an auxiliary mode to increase the fixing effect of the main pasting film and a limiting pasting film used for pasting and limiting a long pipeline. An observable transparent dressing film is arranged in the middle of the main pasting film, the auxiliary pasting film is arranged on the side of the main pasting film, the auxiliary pasting film is also located on the side of the main pasting film, the included angle between the auxiliary pasting film and the auxiliary pasting film is 90 degrees, the limiting pasting film is arranged at the upper end of the main pasting film, and protective films are arranged on pasting layers on the main pasting film. According to the device, an arterial indwelling catheter and an extension pipeline can be fixed, a person can conveniently observe the abnormal condition of the puncture position through the transparent dressing film, corresponding measures are taken in time, the extension pipeline is fixed through wing type crossing of the pasting film and the thumb, and the purposes that dressing replacement is convenient, operation is convenient, time and labor are saved, and fixation is more uniform and attractive are achieved.

The utility model discloses an aortic cannula, and relates to the technical field of aortic cannulas. Comprising a cannula body, a first positioning airbag, a second positioning airbag and a connecting hose. The first positioning air bag and the second positioning air bag are arranged on the outer side of the cannula body and can be tightly pressed on the inner side and the outer side of an aorta adventitia respectively during use, and the problems that high-pressure blood flow enters an aorta cavity, and aorta dissection or false aneurysm is formed are solved; meanwhile, when the intubation tube body needs to be separated from extracorporeal circulation for tube drawing operation, air in the second positioning air bag is completely discharged, then the intubation tube body is pulled out, the first positioning air bag can play a role in blocking sprayed blood flow, and the operator can be effectively protected; the problems that in a traditional aortic cannula, the aortic wall structure is prone to being damaged in the cannula inserting process, and false aneurysm or aortic dissection is formed are solved; the blood pressure in the aorta blood vessel is high, the purse string is easy to avulsion, the aorta wall is damaged, and the intubation tube is easy to fall off.

This utility model belongs to the field of experimental equipment technology, and discloses an ion monitoring device for a rabbit hepatic encephalopathy experimental model, including: an operating table with a monitoring system installed on it; the monitoring system includes a first base with a first fixing rod fixed in the center and two fixing clips on the first fixing rod; a tension transducer with its input end detachably connected to the fixing clips and a three-way valve detachably connected to the input end, with an endotracheal tube detachably connected to the three-way valve for monitoring respiratory rate; and a pressure transducer with its input end detachably connected to the fixing clip and a three-way valve detachably connected to the input end, with an arterial cannula detachably connected to the three-way valve for monitoring changes in arterial blood pressure, heart rate, and respiratory rate during the progression of rabbit hepatic encephalopathy (early, middle, progressive, and recovery phases), thereby increasing the scientific rigor and repeatability of the experimental operation.

The embodiment of the invention provides an organ perfusion system. The organ perfusion system comprises a pump, a venous cannula, an arterial cannula, a balloon driving device and a control device. The near end of the venous cannula and the near end of the arterial cannula are connected with a pump. The far end of the venous cannula is provided with a first opening and used for being inserted into tissue veins without blocking the tissue veins. The far end of the arterial cannula is provided with a balloon and a second opening, the second opening is located in the far end side of the balloon, and the far end of the arterial cannula is used for being inserted into a tissue artery. The control device is electrically connected with the pump and the balloon driving device. The control device is used for controlling the pump to operate so as to extract blood of tissue veins and inject the blood into tissue arteries; the control device is further used for controlling the balloon driving device to drive the balloon to expand so as to block the tissue artery when the blood is injected into the tissue artery, and controlling the balloon driving device to drive the balloon to contract so as to conduct the tissue artery after the blood is injected into the tissue artery. The organ perfusion system can perfuse organs to improve organ functions.

The utility model discloses an arterial duct hand fixator which comprises a support body, the support body comprises a hand back portion located on one side of the hand back, a first web portion located on the first web and a palm portion located on one side of the palm, and the hand back portion, the first web portion and the palm portion are of an integrated structure and form a shape attached to the hand. The device can be well matched with the hands of a patient, and the comfort level can be greatly improved; the hand back part is provided with a first fixing band used for being fixed to the wrist and a second fixing band used for being fixed to the forearm, the hand back part is provided with a flexible clamping tube, the flexible clamping tube is provided with an embedding groove used for containing an infusion tube, and the infusion tube is embedded into the flexible clamping tube from the embedding groove. By means of the friction force between the flexible clamping tube and the infusion tube, the situation that the infusion tube slides, and consequently blood exudation or needle disengagement at a needle opening is caused can be well avoided.

An arterial catheter system comprises a catheter assembly including a catheter hub and an arterial catheter. An arterial catheter system comprises a needle assembly including a needle hub and a guide needle. An arterial catheter system comprises an extension tube coupled to the catheter assembly, and a fluid passage extending through the arterial catheter, catheter hub, and extension tube. The first fluid resistance in a portion of the fluid passage within the extension tube is greater than the second fluid resistance in the fluid passage distal to or proximal to the aforementioned portion of the fluid passage. The extension tube has a length L and an inner diameter D. The geometric coefficient G of the aforementioned portion of the fluid passage. f is L / D 4 It is equivalent to and selected to reduce hemolysis during arterial blood collection.

An arterial catheter system may include a catheter assembly that may include a catheter adapter. An arterial catheter system may include an arterial catheter extending from the distal end of the catheter adapter. An arterial catheter system may include a needle assembly that may include a needle hub and an introduction needle. An arterial catheter system may include an arterial blood shielding device coupled to the catheter assembly. An arterial catheter system may include an arterial catheter, a catheter adapter, and a fluid path within the arterial blood shielding device. A first fluid resistance in the portion of the fluid path within the arterial blood shielding device may be greater than a second fluid resistance in the fluid path distal to that portion of the fluid path.

The invention discloses an ECMO arterial duct for improving limb far-end blood supply, and relates to the technical field of medical instruments, and the ECMO arterial duct is technically characterized in that the ECMO arterial duct comprises a duct main body adopting an integrated double-cavity separation design, and a circulation support cavity and a far-end perfusion cavity which are not communicated with each other are formed. The tail end opening of the circulation supporting cavity is used for supplying blood to aorta abdominalis, and the side wall of the far-end perfusion cavity is provided with a side hole for supplying blood to the far end of the limb. An annular blocking water bag is arranged on the outer wall of the catheter and can be attached to the inner wall of a blood vessel after being filled, two-cavity blood flow is separated, backflow is prevented, and the far-end perfusion efficiency is improved. The in-vitro section is provided with a flow limiting device and a flow sensing device which are connected in series, and real-time monitoring and closed-loop regulation and control of blood flow are achieved. Circulation support and limb far-end perfusion can be synchronously completed through single puncture, puncture injury and operation risks are reduced, and the risk of lower limb ischemia caused by indwelling delay of a far-end perfusion tube due to untimely evaluation or wrong evaluation is avoided. The problem of limb far-end ischemia after ECMO catheterization is effectively solved.

The invention discloses a bent carotid artery intubation tube. A tube body comprises a long-section tube; the short-section pipe is arranged on the lower portion of the long-section pipe, the angle C between the long-section pipe and the short-section pipe is larger than or equal to 90 degrees and smaller than or equal to 120 degrees; the bending part is arranged between the long-section pipe and the short-section pipe; the shallow groove is formed in the middle of the short-section tube, and the shallow groove is used for fixing and bundling a blood vessel blocking band; and an inner diameter channel is arranged among the long-section pipe, the short-section pipe and the bent part in a penetrating manner. The catheter body provided by the invention is convenient for an operator to complete left common carotid artery intubation in a relatively deep and narrow space, so that the injury risk of vascular intima and the injury of surrounding tissues are reduced, and the operation safety is ensured; the blood vessel blocking belt stably fixes the arterial cannula at the arterial cannula groove, and the cannula is not prone to blood leakage and slipping.

A method for neonatal monitoring includes: catheter insertion into a neonatal patient through an implanted umbilical interface; injecting a signal fluid into the body of the neonatal patient through the neonatal PiCCO venous catheter; monitoring hemodynamic signals of circulating blood through a newborn PiCCO arterial duct; and detecting the hemodynamic signal. Catheter insertion into a neonatal patient through an implanted umbilical interface includes: inserting a neonatal PiCCO arterial catheter into an umbilical artery of the neonatal patient; and inserting the neonatal PiCCO venous catheter into the umbilical vein of the neonatal patient.

The invention relates to the technical field of data processing, in particular to a child jugular arteriovenous ECMO intubation depth prediction method and system, and the method comprises the steps: selecting a data object; positioning a notch position; according to the corresponding incision position, measuring the blood vessel depth from the common carotid artery to the unknown artery to the aortic arch at the corresponding incision position as the ECMO arterial intubation depth; according to the corresponding incision position, measuring the depth from the internal jugular vein to the inferior vena cava entering the right atrium at the corresponding incision position as the ECMO vein intubation depth; establishing a prediction formula; outputting a prediction result for reference; according to the method, by summarizing the existing infant jugular artery and vein ECMO intubation experience, the prediction formula of the jugular artery and vein ECMO intubation depth is calculated and verified, so that reference can be provided to help a doctor to more accurately estimate the intubation depth before intubation, and complications caused by improper intubation position are reduced; the prediction formula can be used as a part of standardized operation, and the success rate and safety of ECMO intubation are improved.

The utility model discloses a bubble adsorption device for extracorporeal circulation pipeline connection, which comprises an arc-shaped connecting pipe, an exhaust structure for automatically adsorbing air in blood is arranged in the middle of the outer arc-shaped surface of the arc-shaped connecting pipe, and clamping structures are arranged at the two ends of the arc-shaped connecting pipe. Wherein one clamping structure is connected with a heart aorta cannula, and the other clamping structure is connected with an access pipe of a body temperature circulator. In the heart aorta cannula and heart open surgery process, along with blood diversion, air in blood can be rapidly separated from the blood, and the blood can be rapidly separated from the heart aorta cannula; and meanwhile, the two ends of the arc-shaped connecting pipe can be quickly connected with the heart aorta cannula and an access pipe of the body temperature circulator, and the connecting stability is good.

The invention relates to the technical field of medical auxiliary instruments, in particular to a rat arterial intubation auxiliary device which comprises a base, the base comprises a plate-shaped structure, and a blood vessel groove is formed in the plate-shaped structure; the supporting assembly comprises a supporting column and a hanging hook rod, one end of the supporting column is fixedly connected with the plate-shaped structure, the hanging hook rod is connected with the other end of the supporting column, and the hanging hook rod and the blood vessel groove are arranged in the same plane; the arterial puncture positioning assembly comprises an arterial clamp and a sharp hook, the arterial clamp is in sliding connection with the hanging hook rod, and the sharp hook is fixedly connected with the hanging hook rod. According to the rat arterial intubation auxiliary device, the operation process of rat arterial intubation is simplified, experimenters can avoid time waste and hurry caused by misoperation in the operation process, intubation operation can be rapidly and efficiently completed, the experiment efficiency is improved, and the experiment time and cost are saved.

The invention relates to the technical field of medical equipment, and provides an extracorporeal circulation cannula which comprises a cannula body. A first opening area is arranged at the position, away from the first end by a first distance, of the side wall of the cannula body, and a plurality of first side holes are formed in the first opening area. The first side holes are arranged in the side wall of the cannula body in an array mode. According to the intubation tube for extracorporeal circulation, the first end of the intubation tube body is inserted into the venous blood vessel and communicated with the venous blood vessel, and the second end of the intubation tube body is communicated with the external equipment, so that the intubation tube is matched with the external equipment and the arterial intubation tube to form a circulation loop, and blood is drained out of the body from the body; after being subjected to gas exchange by the membrane type oxygenator, the gas is transfused back into the body through the arterial cannula to temporarily replace the cardiopulmonary function, so that rescue treatment is provided for critical patients; meanwhile, the first side holes which are arranged in an array mode are formed in the position, close to the first end, of the cannula body, the first side holes can effectively improve the flow field near an outlet of the cannula, and the recirculation rate can be reduced easily.

The ECMO distal perfusion device and the use method thereof provided by the present disclosure relate to the technical field of medical devices, and comprise a first pipeline, a second pipeline, an extension pipe, a three-way pipe and an adjusting cap. The first end and the second end of the three-way pipe are connected to the loop of an ECMO arterial cannula, the third end of the three-way pipe is communicated with one end of the extension pipe, the other end of the extension pipe is communicated with the first pipeline, the end of the first pipeline away from the extension pipe is provided with the adjusting cap, the adjusting cap is communicated with the second pipeline arranged in the adjusting cap, the perfusion flow from the first pipeline to the second pipeline can be adjusted by the adjusting cap, the other end of the second pipeline is communicated with a distal artery, a sheath tube and a guide wire in the second pipeline can pass through, and a closable opening arranged at the communication position of the adjusting cap and the second pipeline is removed. The device can ensure sufficient perfusion flow and control the flow, and the adjusting cap and the closable opening can protect the second pipeline.

Multi-Channel Arterial Catheter for Enhanced Cerebral and Head–Neck Perfusion

This invention relates to the field of medical device technology, specifically an ECMO arterial catheter capable of altering the direction of perfusion blood flow. The catheter comprises a tube body with openings at both ends. The right end of the tube body is a pre-flush section, the middle end is a buffer section, and the left end is a perfusion section. The perfusion section includes a central lumen and three side lumens. The central lumen is located in the middle of the inner part of the tube body, and three equally divided septa are located on the outer periphery of the central lumen, dividing the tube body into three side lumens. The inner wall of the left end of each side lumen is a blood flow redirection surface. This invention, by designing the arterial catheter lumen as a central lumen with forward blood flow and three side lumens with redirected blood flow, maximizes the alignment of the blood flow direction in the ECMO arterial catheter with the physiological direction, reduces the adverse effects of ECMO on left ventricular output and damage to the vascular endothelium, and improves hemodynamic stability and safety during VA-ECMO implementation.