55 results about "Arterial canal" patented technology

The present invention provides a dialysis catheter that is designed to function in reverse-flow, having a dual lumen configuration. An embodiment of the present invention includes two lumen cooperatively configured in a co-axial design. The arterial lumen is circular or oval and extends beyond the termination of the venous lumen. The arterial lumen extracts the blood from the blood vessel for hemodialysis treatment. The venous lumen is also circular or oval. Terminating at a proximal point to the distal end of the arterial lumen, this configuration of the venous lumen aids in preventing recirculation. The venous lumen returns dialyzed blood back into the patient. The venous lumen can further include a plurality of apertures to aid in reducing the risk of fibrin sheath growth. In a method of use, the arterial lumen of the invention preferably resides within the right atrium with the venous lumen positioned within the superior vena cava.

The invention concerns a dialysis machine (10) comprising a dialyzer (20) having a first inlet (21) and a first outlet (22) for the bloodstream, dialysate supply mechanism (25), an arterial line (16) connected between the patent's arteriovenous fistula and the dialyzer, a venous line (17) connected between the arteriovenous fistula and the dialyzer, a pump (28) coupled with the arterial line, a dialysate supply line (31), connected between the dialysate supply mechanism and the dialyzer, a dialysate evacuation line (33) connected between a dialysate recuperating container (27) and the dialyzer. The sterile dialysate bags are arranged in a chamber (26) under a gas pressure.

An extracorporeal blood circuit for use with a venous return line and an arterial line coupled to a patient. The extracorporeal blood circuit can include a venous air removal device coupled to the venous return line. The venous air removal device can perform an active air removal function. The extracorporeal blood circuit can include a sensor that determines a blood level in the venous air removal device, a purge line coupled to the venous air removal device, and a controller connected to the sensor. The controller can cause the venous air removal device to perform the active air removal function through the purge line when the blood level is less than a threshold. The extracorporeal blood circuit can further include a pump coupled to the venous air removal device, an oxygenator coupled to the pump, and a blood filter coupled to the oxygenator and the arterial line.

The invention relates to a blood treatment device by extracorporeal circulation comprising a filter having a primary chamber and a secondary chamber separated by a semi-permeable membrane; a blood circuit comprising an arterial line intended to come from the patient, the filter's primary chamber and the venous line intended to return to the patient; a dialysate circuit comprising the filter's secondary chamber and at least a drain line for circulating the waste intended to come from the filter and intended to go to a drain; a first bag in fluid communication with the drain line; at least a first gravimetric weighing means linked to the first bag, fluid flow rate adjustment means acting on the drain line; a control unit linked to the first gravimetric weighing means and with the fluid flow rate adjustment means; a second bag in fluid communication with the drain line, the control unit being capable of receiving weight signals from the first gravimetric weighing means and of controlling the fluid flow rate adjustment means to load one of the bags with liquid while the other bag unloads liquid, and vice-versa. The invention also relates to a single-use drain line for use in a treatment device according to the invention.

This invention provides a method and apparatus for calculating a hemodialysis parameter, especially blood access flow rate, using multiple dialysance values. The dialysance values may be calculated based upon either sodium or urea concentrations. One dialysance value can be determined for conditions in which a patient's arterial line withdraws blood from an upstream location in a patient's fistula and treated blood is returned by a venous line to a downstream location in a patient's fistula. The second dialysance value can be determined when the lines have been reconfigured so that the arterial line withdraws blood from a downstream portion of a patient's fistula and the venous line returns treated blood to an upstream portion of a patient's fistula. Since it is possible to determine the dialysance values solely from concentration measurements made on the dialysate side of the dialysis apparatus, the present method and apparatus provide a non-invasive means for determining hemodialysis parameters such as blood access flow rate and recirculation.

A multilumen venous access catheter and method of use and repair is provided. The catheter has a means for identifying at least one physical characteristic of an arterial tube and a means for identifying at least one physical characteristic of a venous tube. The at least one physical characteristic of the respective arterial and venous tubes are different in order to allow a user to distinguish between the arterial and venous catheter tubes during use, manufacture, and repair.

The invention discloses a water quality modifying method of field ecological arterial canal-artificial wetland and reconstructing method of ecological system, which is characterized by the following: predisposing collected rural living effluent and little industrial waste water; flowing in the field ecological arterial canal; blending with field draining water; purifying; modulating water quantity through water collection biological pond; purifying in the artificial wetland; reconstructing ecological system to restore biological diversity.

The invention relates to a medical apparatus of interventional therapy, and particularly relates to a radiofrequency ablation electrode catheter used for curing refractoriness hypertension through per cutem and blood vessel to enter into renal artery. According to the invention, the technical problem to be solved is that a sympathetic nerve on the arterial canal of the renal artery can be effectively removed, so that damages to the inner wall of the vessel can be reduced. According to the invention, the radiofrequency ablation controlled electrode catheter for renal artery is provided with a catheter body, wherein an electrode is connected with a far-end of the catheter body; a control handle is connected with a near-end of the catheter body; an ablation electrode and a monitoring electrode are arranged at the far-end of the catheter body along the axis of the catheter body; and an interval is arranged between the ablation electrode and the monitoring electrode. Compared with prior art, the invention is in characterized in that no fill orifice is arranged on the ablation electrode; the monitoring electrode adjoins the ablation electrode through the interval; the temperature of the sympathetic nerve which is ablated is monitored during the ablation process, so as to judge a clinical treatment required value is reached; also, the conduction of sympathetic nerve signal acquired through monitoring the electrodes, and the comparison of conduction waveforms of the sympathetic nerve before and after ablation, can provide supplementary means for judging if a surgical operation end is finished or not.

The invention relates to a blood treatment device by extracorporeal circulation comprising a filter having a primary chamber and a secondary chamber separated by a semi-permeable membrane; a blood circuit comprising an arterial line intended to come from the patient, the filter's primary chamber and the venous line intended to return to the patient; a dialysate circuit comprising the filter's secondary chamber and at least a drain line for circulating the waste intended to come from the filter and intended to go to a drain; a first bag in fluid communication with the drain line; at least a first gravimetric weighing means linked to the first bag, fluid flow rate adjustment means acting on the drain line; a control unit linked to the first gravimetric weighing means and with the fluid flow rate adjustment means; a second bag in fluid communication with the drain line, the control unit being capable of receiving weight signals from the first gravimetric weighing means and of controlling the fluid flow rate adjustment means to load one of the bags with liquid while the other bag unloads liquid, and vice-versa.The invention also relates to a single-use drain line for use in a treatment device according to the invention.

Systems, methods, and devices of the various embodiments enable continuous non-invasive monitoring of blood pressure with a minimum of interference. The various embodiments may provide a method for adaptation for the calibration for continuous measurements of blood pressure, wherein the measured quantity may be related to an arterial lumen or arterial cross sectional area comprising calibrating the conversion for incremental variations of arterial properties and absolute value adaptation by exploitation of the exponential decay during the diastole. In various embodiments, continuous calibration of a non-interfering blood pressure measurement device may be initiated based on a change in mean arterial pressure being greater than a threshold value, such as a pressure value associated with an actual measured distension of a patient's artery.

The invention discloses a blood purifier. The blood purifier comprises an artery pipe, a vein pipe and a blood filter. The artery pipe communicates with an artery kettle after bypassing a blood pump, and the vein pipe communicates with a vein kettle. A displacement liquid communicates with the vein kettle after bypassing a displacement liquid pump through pipes. A liquid waste output port of the blood filter communicates with a liquid waste collecting bag after bypassing a liquid waste pump through pipes. One in-film joint of the blood filter communicates with a first multi-pipe gating switch, and the other in-film joint of the blood filter communicates with a second multi-pipe gating switch. The first multi-pipe gating switch communicates with the vein kettle, and the second multi-pipe gating switch communicates with the artery kettle. Both the first multi-pipe gating switch and the second multi-pipe gating switch have ports connected with a blood filter to be replaced. The blood purifier can solve the problems, such as blood exosmosis, increase of financial burden for a patient caused by frequently whole pipe replacement, influence on blood filtration, and increase of risk of blood infection, caused by direct separation of cruor in pipes during blood purification and installation of pipes and a blood filter.

The measurement of blood flow in a dialysis shunt is obtained by injection of an indicator material into a venous line leading from dialysis equipment to the shunt. The blood flow in an arterial line leading from the shunt at a location downstream of the venous line to the dialysis equipment is monitored by an arterial line sensor for the presence of the indicator material. A detector connected to the sensor provides a dilution curve in response to the presence of the indicator material and the blood flow in the shunt is calculated from the area under the dilution curve. The locations of the arterial and venous lines in the shunt can be reversed to obtain a measurement of blood recirculation from the venous line into the arterial line.

The invention relates to the technical field of hemodialysis catheters, in particular to a fixing device for a catheter used in hemodialysis of a child. The invention aims to solve the problems that the fixing position of fixing equipment of a hemodialysis catheter is limited, a hemodialysis catheter is prone to deformation after being fixed, dialysate transmission is affected, and discomfort is easily caused due to the fact that the covering area of a connecting belt is large in the prior art. The fixing device for the catheter used in hemodialysis of the child comprises a dialysis tube bifurcation block and static artery tubes, wherein the static artery tubes are connected to the two sides of the front surface of the dialysis tube bifurcation block, and a connecting mechanism is arranged on one side of the outer side wall of the dialysis tube bifurcation block. According to the fixing device, after being tightened, a rubber band belt is driven by a supporting frame to be tightened again to fix a position, so the hemodialysis catheter can be fixed to a certain position without being limited by the hemodialysis catheter fixing device; length adjustment is conducted through a telescopic sleeve under ventilation control to protect the hemodialysis catheter, so the hemodialysis catheter is prevented from being damaged; and heat dissipation of a area covered by the rubber band is not affected by air generated after an air bag on the rubber band expands.

The invention relates to an automatic insect body-fluid collector. A delivery device, a table and a positioned cutting system are arranged on a frame. The delivery device comprises a rail, a clamp base and a clamp; the clamp base can shift transversely on the rail; the clamp can shift on the clamp base upwards or downwards. During use, insect holders are arranged on the table, backs of insects in the insect holders face to the cutting device, the insect holders are clamped and moved to the cutting device by the clamp, and then the backs of the insects are driven to face to the cutting device sequentially; therefore, when the cutting device cuts out the cuts, leading to back arterial canals, on surfaces of insects, no internal organs between the back arterial canals and the abdomens can be cut, and fluids of the internal organs cannot be mixed with the insect body fluids collected.

The invention discloses a control method and system of a dual plasma molecule adsorption system and a storage medium, and the method comprises the steps: obtaining the blood flow in an artery pipeline according to the rotating speed of a blood pump when the dual plasma molecule adsorption system carries out blood purification; determining the plasma flow of the plasma branch according to the plasma separation ratio of the plasma separator and the blood flow in the artery pipeline; according to the plasma flow and the blood purification time of the plasma branch, the first plasma cumulative adsorption quantity of the hemoperfusion device and the second plasma cumulative adsorption quantity of the bilirubin adsorption column are determined; when the first plasma cumulative adsorption quantity is larger than or equal to the first plasma target adsorption quantity of the hemoperfusion device, and / or the second plasma cumulative adsorption quantity is larger than or equal to the second plasma target adsorption quantity of the bilirubin adsorption column, a fault alarm signal is sent out; the blood perfusion device and / or the bilirubin adsorption column in the dual plasma molecule adsorption system are / is prompted to be replaced. In this way, the efficiency of DPMAS treatment can be improved.

A system for calculating blood pressure may include a sensor system and a control system. The control system may be capable of controlling one or more sensors of the sensor system to take at least twomeasurements, the at least two measurements including at least one measurement taken at each of two or more different measurement elevations of a subject's limb. In some examples, the control systemmay be capable of determining a blood flow difference based on the at least two measurements, of determining a hydrostatic pressure difference based on the two or more different elevations of the at least two measurements and of estimating a blood pressure based on one or more values of blood flow, the hydrostatic pressure difference and the blood flow difference.

The invention belongs to the field of medical instruments and relates to a device for being implanted in the abnormal bulging position of an arterial canal wall. The device comprises a bag capable of being implanted in the abnormal bulging position of the arterial canal wall and bulging, when the bag bulges, the bag has 3D modeling anatomy three-dimensional morphological features conforming to the implanting position, and therefore blood cannot flow into the abnormal bulging position of the arterial canal wall from an arterial canal. According to the device, the blood cannot flow into the abnormal bulging position of the arterial canal wall from the arterial canal, blood flow smoothness in the tumor-carrying arterial canal is kept, blood flow smoothness of branch blood vessels of the arterial canal is kept, thus, the device can be used for treating the diseases such as intracranial aneurysms, visceral aneurysms, false aneurysms, aortic aneurysms, artery dissection and aortic dissection, and a new way for aortic disease interventional therapy is expected to be opened up.

The invention relates to blood-treatment equipment with an extra-corporeal circulation comprising an arterial line, a blood pump, a blood-treatment unit and a venous line, wherein the arterial and venous lines can be connected to a blood vessel of a patient. The blood-treatment equipment has an evaluation- and control unit and said evaluation- and control unit is designed to carry out the following steps: (a1) determining the blood re-circulation in a blood vessel of the patient that is connected to the extra-corporeal circulation; and (b) calculating the blood flow in the blood vessel using the blood re-circulation determined according to (a1) and using a value that has been provided or likewise previously determined for the cardiac output of the patient.

The invention belongs to the technical field of surgical human body models, and in particular relates to a human body model for clinical surgery skill teaching. A surgical model is installed at the position of the outer surface of an upper limb model located on a first mounting groove, the upper limb model is detachably connected with the surgical model, a metal block is disposed at the position of one side of the surgical model close to a fixed magnet, the metal block is fixedly connected with the fixed magnet, and a second arterial canal is disposed in the surgical model. When the surgical model is damaged after an experiment is completed, the surgical model can be disassembled and repaired or a new surgical model can be placed in the first mounting groove instead, thereby avoiding damage to the entire human body model, and the learning cost can be reduced. Meanwhile, the experiment is provided for many students. Since liquid flows in the second arterial canal and a capillary, the realism of the model is increased, making it more realistic when the student performs exercises such as cutting, suturing, and hemostasis, or the model is closer to a real person.

The invention discloses an ECMO simulation training human body model convenient to exhaust, which comprises a model main body and a simulated heart container arranged on the model main body, the simulated heart container is provided with a main vein tube and an aortic tube, the main vein tube is connected with a vein branch tube, the vein branch tube is detachably connected with a vein needle insertion tube, the aortic tube is connected with a carotid artery tube, and the carotid artery tube is detachably connected with a vein needle insertion tube. The upper end of the carotid artery tube is detachably connected with a first artery needle inserting tube, the upper end of the first artery needle inserting tube is connected with an exhaust funnel communicated with the first artery needle inserting tube, an exhaust hole is formed in the upper end of the exhaust funnel, a floating block capable of floating on the water surface is arranged in the exhaust funnel, and an air inlet communicated with the first artery needle inserting tube is formed in the lower end of the exhaust funnel. And a sealing structure capable of sealing the exhaust hole when the floating block is in a floating state is arranged between the floating block and the exhaust funnel. The human body model can be applied to ECMO simulation practical training, and air in the liquid channel can be conveniently exhausted in the simulation practical training.

A device for the continuous monitoring of blood characteristic quantities in an external cardiovascular supporting circuit, said circuit including a venous line which conveys blood from the patient to an oxygenator, and along which at least one pump is arranged, and an arterial line which returns blood from the oxygenator to the patient, where said oxygenator comprises at least one blood inlet port connected to said venous line and at least one blood outlet port connected to said arterial line, at least one inlet channel and at least one outlet channel of a work gas intended to supply oxygen to the blood and / or to remove carbon dioxide from the same.

The invention discloses a human body model applied to ECMO simulation practical training, which comprises a model main body and a simulated heart container arranged on the model main body, the simulated heart container is provided with a main venous canal and an aortic canal, and the model main body is provided with a femoral venous canal, a femoral artery canal, a jugular venous canal and a carotid artery canal. The upper end of the femoral vein tube, the lower end of the jugular vein tube and the main vein tube are connected through a three-way valve, the upper end of the femoral artery tube, the lower end of the carotid artery tube and the aorta tube are connected through a three-way valve, and the upper end of the jugular vein tube, the lower end of the femoral vein tube, the upper end of the carotid artery tube and the lower end of the femoral vein tube are all detachably connected with needle inserting tubes. According to the human body model, students can master clinical operation of ECMO skillfully, and meanwhile, a punctured tube can be replaced conveniently.

The present invention relates to a method for removing blood from an extracorporeal blood circuit and / or a functional device, each connectable or connected with a blood treatment apparatus for the purpose of blood treatment of a patient. The blood treatment apparatus of the method comprises or is connected with at least one extracorporeal blood circuit with a line having interior portions, the extracorporeal blood circuit comprising at least one arterial line section and at least one venous line section, wherein a first section of the arterial line section is configured to be connected with a second section of the venous line section, and further comprises at least one blood pump for conveying blood within the line interior portions. The method includes the step of operating the blood pump in a second conveying direction which is opposite to a first customary conveying direction. It further relates to corresponding apparatuses.

Methods of monitoring arterial blood using an arterial line tube positions adjacent to a groin sheath, as part of a surgical intervention. Described herein are methods and apparatuses (e.g., systems) for introduction of an arterial line tube for contemporaneous and sensitive blood pressure monitoring along with other instrumentation in the course of a therapeutic intervention through a femoral artery, affording improved monitoring results.

The invention relates to the technical field of polypeptide extraction, in particular to a preparation method and application of protein oligopeptide rich in desmosine and isodesmosine. The inventionprovides the preparation method of the protein oligopeptide. The method comprises the following steps of sequentially carrying out alkali liquor soaking and acid liquor soaking on to-be-extracted tissue, performing grinding until the granularity is 100-200 meshes, carrying out enzymolysis by using alkaline protease and pancreatin, carrying out enzyme deactivation and centrifugation to obtain supernatant, and carrying out fine filtration and nanofiltration to obtain a solution containing the protein oligopeptide, wherein the to-be-extracted tissue is the arterial canal, the ligament, the lung,the fascia, the cartilage or the eggshell membrane. The extracted protein oligopeptide is rich in desmosine and isodesmosine, and the polypeptide with the molecular weight less than 1,000 Da accountsfor 50%-85% of the total polypeptide mass. According to the method, alkali liquor and acid liquor are used for degreasing and impure protein removing, so that residues and pollution of an organic solvent are avoided, operation is easy, and the extraction efficiency is high.

A spiral wire with shape memory wound to a small circumference for percutaneous introduction into an artery lumen has holding balloons gripping each end to control unwinding that increases and decreases circumference of a concentric graft tube against artery wall without under-sizing that creates dangerous gaps or over-sizing that promotes occlusion re-growth. Inflating holding balloons pushes ends of a plurality of tunnel arcs located at 2 mm intervals in rim around balloon circumferences tightly against graft tube whereupon push-rods within tunnel arcs simultaneously push out sharp circular sutures of memory material that return to original circular shape as they pierce and join graft tube and artery wall.

The invention discloses a water quality modifying method of field ecological arterial canal-artificial wetland and reconstructing method of ecological system, which is characterized by the following: predisposing collected rural living effluent and little industrial waste water; flowing in the field ecological arterial canal; blending with field draining water; purifying; modulating water quantity through water collection biological pond; purifying in the artificial wetland; reconstructing ecological system to restore biological diversity.

The invention relates to an automatic insect body-fluid collector. A delivery device, a table and a positioned cutting system are arranged on a frame. The delivery device comprises a rail, a clamp base and a clamp; the clamp base can shift transversely on the rail; the clamp can shift on the clamp base upwards or downwards. During use, insect holders are arranged on the table, backs of insects in the insect holders face to the cutting device, the insect holders are clamped and moved to the cutting device by the clamp, and then the backs of the insects are driven to face to the cutting device sequentially; therefore, when the cutting device cuts out the cuts, leading to back arterial canals, on surfaces of insects, no internal organs between the back arterial canals and the abdomens can be cut, and fluids of the internal organs cannot be mixed with the insect body fluids collected.

The invention relates to the technical field of medical apparatus and instruments, in particular to a hemostatic stent for heart great vessel surgery, which is characterized in that a first shell and a second shell can be relatively closed and opened by using a connecting assembly, so that when aorta is clamped and sealed, the first shell and the second shell can be relatively closed and opened; the first shell and the second shell which are oppositely opened are smoothly arranged at any position of an arterial canal in a sleeving mode through the opened opening, installation of the clamping and sealing assemblies on the aorta is conveniently completed, in addition, the two clamping and sealing assemblies are arranged on the first shell and the second shell at the same time, alternate clamping can be conveniently achieved during aorta clamping and sealing hemostasis, and the clamping and sealing efficiency is improved. The problems that in the long-time operation process, if the clamping and sealing assembly is not loosened frequently, the outer wall of the aorta blood vessel is damaged to a certain degree, once the clamping and sealing assembly is loosened, the aorta sprays a large amount of blood, the blood loss amount in the operation is increased, the operation view is affected, and meanwhile the operation risk is increased are effectively avoided.

A device (1) for the continuous monitoring of blood characteristic quantities in an external cardiovascular supporting circuit (2), said circuit (2) comprising a venous line (3), an oxygenator (4), apump (5), and an arterial line (6), comprising: a sensor (7) suitable for the measurement of the venous saturation (SAT V) and a sensor (8) suitable for the measurement of the arterial saturation (SATA) of oxygen; a sensor (11) suitable for the measurement of the flow of blood (Qb) sent by the pump (5) to the oxygenator (4); a sensor (12) suitable for the measurement of the hemoglobin (Hb); dataentering means by the operator; an electronic control unit (14) provided with a microprocessor (15) and operationally connected to a display (16), and further comprising a sensor (19) suitable for themeasurement of the flow of work gas (Gf) and a capnometer (20) adapted to measure the concentration of carbon dioxide in the blood; wherein said microprocessor (15) is provided with means adapted tocalculate the quantity relating to the amount of carbon dioxide removed by the oxygenator (V'CO2ML) and the quantity relating to the amount of oxygen transferred by the oxygenator (V'CO2ML), the microprocessor (15) being programmed to display in numerical form on the display (16) the values of all the quantities measured and calculated and in graphic form at least some of said values, being further provided means for acquiring the quantity relating to the amount of carbon dioxide removed from the patient's lung (V'CO2NL) and the microprocessor being provided with means adapted to calculate thequantity relating to the amount of total removed carbon dioxide (V'CO2total).