72 results about "Arterial catheter" patented technology

The invention discloses an extracorporeal circulation system and a control method thereof, and relates to the technical field of medical instruments. The extracorporeal circulation system comprises a membrane oxygenator, a microembolus filter, a rolling pump, a first pressure detector and a second pressure detector; a liquid inlet of the membrane oxygenator is communicated with the arterial cannula; the microembolus filter is circularly communicated with the membrane oxygenator, and the liquid outlet end of the microembolus filter is communicated with the venous cannula; the rolling pump is circularly communicated with the membrane oxygenator; the first pressure detector is communicated with the rolling pump and is used for detecting the outlet liquid pressure of the rolling pump and generating a first pressure signal; the second pressure detector is communicated with the microplug filter and is used for detecting the inlet liquid pressure of the microplug filter and generating a second pressure signal; the structure of the extracorporeal circulation system and the control method of the extracorporeal circulation system are improved, the accuracy and timeliness of medical staff for judging the oxygenation effect of the membrane type oxygenator are improved, the membrane type oxygenator can be replaced in time, a large number of complications can be avoided, and the death rate of patients is reduced.

An arterial catheter system may include a catheter assembly, which may include a catheter adapter. The arterial catheter system may include an arterial catheter extending from a distal end of the catheter adapter. The arterial catheter system may include a needle assembly, which may include a needle hub and an introducer needle. The arterial catheter system may include an arterial hemoshield device coupled to the catheter assembly. The arterial catheter system may include a fluid pathway within the arterial catheter, the catheter adapter, and the arterial hemoshield device. A first fluidic resistance within a portion of the fluid pathway within the arterial hemoshield device may be greater than a second fluidic resistance within the fluid pathway distal to the portion of the fluid pathway.

An umbilical arterial catherization device comprising a brace and a dilator. The brace has a body for supporting and stabilizing an umbilical cord end. The body may have resilient foam for grasping the umbilical cord, and may include a strap operable to secure part of the body to itself, after being wrapped around the umbilical cord. The dilator has a hook for engaging an open end of an arterial lumen, and a catch operable to fix the dilator to the brace in a position for dilating the arterial lumen. Both hands may be used to place the dilator while the device serves to stabilize and support the umbilical cord without use of the hands. The device may include a lighting element for illuminating the end of the umbilical cord to aid in visualization of the arterial lumen and facilitate proper placement of the catch within the arterial lumen.

The utility model relates to the field of medical treatment, in particular to a balloon angiography catheter which comprises a catheter body and a balloon arranged at the far end of the catheter body, the balloon is a compliant balloon, and a catheter body at the far end of the catheter body is arranged to be a moldable shaping section. The catheter comprises an outer tube and an inner tube, the outer tube and the inner tube are coaxially arranged, a through cavity is formed between the outer tube and the inner tube, the far-end tip of the through cavity is a closed surface, the balloon is arranged on the outer tube, and a balloon cavity of the balloon is communicated with the through cavity, so that when gas is introduced into the through cavity, the balloon expands the through cavity to be used for injecting liquid or introducing a guide wire; due to the fact that the angiographic catheter is provided with the plurality of angiographic holes, even if the angiographic catheter is not well fixed to an ideal aorta angiographic position, contrast agents can be normally conveyed, PDA development is facilitated, part of the side holes are located on the pulmonary artery side of the arterial catheter, the contrast agents flowing out of the pulmonary artery holes are not prone to interfering with PDA development, and the angiographic catheter is convenient to use. The angiographic catheter is beneficial to PDA development.

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 special anti-backflow type tee joint for an artery indwelling catheter, which comprises an adjusting valve, an adjusting valve fixing port, a first infusion port, a second infusion port, a main infusion port, an anti-backflow device and a fixing sleeve, the first infusion opening is formed in one end of the adjusting valve fixing opening and connected to a horizontal through hole in one end of the adjusting valve fixing opening, the second infusion opening is located in one side of the adjusting valve fixing opening and connected to a middle section through hole of the adjusting valve fixing opening, and a horizontal through hole in the other end of the adjusting valve fixing opening is connected with a main infusion opening. The anti-reflux device is connected to the interior of the main infusion opening in the length direction of the main infusion opening, and the fixing sleeve is connected to the main infusion opening in a sliding mode, through the arranged anti-reflux device, liquid medicine leakage and blood reflux are remarkably reduced, and the safety of arterial duct infusion is guaranteed; and the treatment accuracy and efficiency are improved through the specially designed adjusting valve and fixing sleeve.

An arterial catheter system may include a catheter assembly, which may include a catheter adapter. The arterial catheter system may include an arterial catheter extending from a distal end of the catheter adapter. An arterial catheter system may include a needle assembly that may include a needle hub and an introducer needle. An arterial catheter system may include an arterial blood protection device coupled to a catheter assembly. The arterial catheter system may include fluid pathways within the arterial catheter, the catheter adapter, and the arterial blood protection device. A first fluid resistance within a portion of the fluid pathway within the arterial blood protection device may be greater than a second fluid resistance within the fluid pathway distal to the portion of the fluid pathway.

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.

A biocompatible and bioresorbable implantable device that is intended to be deployed in the arteries supplying the tumors through intra-arterial catheters and release a chemotherapeutic agent for a prolonged period into the branches of the artery to treat tumors. The implantable device may be a mesh with multiple helical loops, fenestrated collapsible hollow shell or spheroid, or folded sheath.

The invention belongs to the technical field of medical instruments, and discloses a puncture system which comprises an arterial duct, a puncture needle, a venous duct, a first guide wire and a second guide wire. The arterial duct penetrates through the artery; the puncture needle penetrates through the arterial duct, and the far end of the puncture needle extends in a bent mode and punctures into the vein from the artery. The venous catheter penetrates through veins; the first guide wire penetrates through the puncture needle and is introduced into the vein; the second guide wire penetrates through the venous catheter; an adsorption part is arranged at the far end of one of the first guide wire and the second guide wire, and the adsorption part is used for being fixed to the far end of the other guide wire in an adsorption mode. Therefore, the first guide wire can be guided to a specified position only by penetrating a puncture needle into a specified position, and after the second guide wire enters the specified position, the far end of the first guide wire and the far end of the second guide wire can be automatically fixed together by utilizing the adsorption force of the adsorption part, so that the connection of the first guide wire and the second guide wire is quickly completed, and the labor intensity of workers is reduced. The difficulty of capturing the guide wire is effectively reduced, and smooth completion of an operation is ensured.

An arterial catheter system may include a catheter assembly that may include a catheter hub and an arterial catheter. An arterial catheter system may include a needle assembly that may include a needle hub and an introducer needle. The arterial catheter system may include an extension tube coupled to the catheter assembly and a fluid pathway extending through the arterial catheter, the catheter hub, and the extension tube. A first fluid resistance within a portion of the fluid passage within the extension tube may be greater than a second fluid resistance within the fluid passage distal or proximal to the portion of the fluid passage. The extension tube may have a length L and an inner diameter D. The geometry factor Gf of the portion of the fluid pathway may be equal to L / D4 and may be selected to reduce hemolysis during blood drawing from the artery.

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.

A blood extraction device includes a catheter tube, a housing configured to movably receive the catheter tube, and an advancement member movably coupled to the housing to move the catheter tube between a first position and a second position, the distal end of the catheter tube is disposed beyond the distal end of the housing and through the distal tip of the indwelling arterial catheter. An auxiliary catheter is coupled to and proximally extends from the advancement member, wherein an acquisition device is coupled to the auxiliary catheter for fluid communication with the catheter body. The blood extraction device is configured such that a fluid path formed by the catheter body and the auxiliary catheter has a controlled geometric factor defined as a ratio of a length of the fluid path to an inner diameter of the fluid path. The blood extraction device can facilitate improved arterial line blood collection for arterial blood gas sampling and continuous pressure monitoring.

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.

An arterial catheter system may include a catheter assembly, which may include a catheter adapter. The arterial catheter system may include an arterial catheter extending from a distal end of the catheter adapter. The arterial catheter system may include a needle assembly, which may include a needle hub and an introducer needle. The arterial catheter system may include an arterial hemoshield device coupled to the catheter assembly. The arterial catheter system may include a fluid pathway within the arterial catheter, the catheter adapter, and the arterial hemoshield device. A first fluidic resistance within a portion of the fluid pathway within the arterial hemoshield device may be greater than a second fluidic resistance within the fluid pathway distal to the portion of the fluid pathway.

An arterial catheter system may include a catheter assembly, which may include a catheter adapter. The arterial catheter system may include an arterial catheter extending from a distal end of the catheter adapter. An arterial catheter system may include a needle assembly that may include a needle hub and an introducer needle. An arterial catheter system may include an arterial blood protection device coupled to a catheter assembly. The arterial catheter system may include fluid pathways within the arterial catheter, the catheter adapter, and the arterial blood protection device. A first fluid resistance within a portion of the fluid pathway within the arterial blood protection device may be greater than a second fluid resistance within the fluid pathway distal to the portion of the fluid pathway.

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 a hemodialysis catheter fixing device, relates to the field of medical instruments, and solves the technical problems that an existing hemodialysis catheter fixing device does not consider that the fixing length of a puncture needle fixing device and a catheter is short, the catheter is prone to shaking and bending, and the risk of needle falling exists. The fixing device comprises a soft cushion, a venous catheter containing groove and an arterial catheter containing groove which are the same in structure are formed in the soft cushion, an artery puncture fixing part and a vein puncture fixing part which are the same in structure are arranged in the length extension direction of the artery catheter containing groove and the venous catheter containing groove respectively, and the vein puncture fixing part comprises a fixing base and V-shaped fixing dressing detachably connected to the two ends. A needle groove is formed in the fixing base, and a blocking piece matched with an aircraft wing of the puncture needle is arranged in the length extending direction of the needle groove. The puncture needle is fixed through the needle groove and the blocking piece, the catheter is fixed through the artery catheter containing groove and the vein catheter containing groove, the fixed length of the catheter is increased, the catheter is prevented from shaking and bending, the risk of needle disengagement is reduced, and operation is easy and convenient.

A balloon occlusive aortic cannula having a hollow cannula and an inflation lumen having a distal end and an expandable element surrounding the hollow cannul and having an exterior surface. The expandable element is disposed on the distal end of the inflation lumen. The expandable element having a micro surface texture formed on the exterior surface. The micro surface texture having a plurality of surface features configured to engage an aortic wall and form a fluidic seal therebetween during a cardiopulmonary bypass procedure.

A sensor module has an arterial catheter connection hub. The sensor module has a perfusion inflow hub coupled through an arterial / portal blood chamber to the arterial catheter connection hub. The sensor module has a venous catheter connection hub. The sensor module has an effluent outflow hub coupled through a venous blood chamber to the venous catheter connection hub. The sensor module has an arterial sensor to sense a parameter of an arterial fluid flowing through the arterial / portal blood chamber. The sensor module has a venous sensor to sense a parameter of a venous fluid flowing through the venous blood chamber. The sensor module has a processor coupled to the arterial sensor and the venous sensor to determine a relationship between the parameter of the arterial fluid sensed by the arterial sensor and the parameter of the venous fluid sensed by the venous sensor.

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.