52 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.

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.

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.

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 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.

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 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.

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.

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.

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).

The invention relates to an extracorporeal blood treatment apparatus witha control device (50) for controlling the opening and closing of an arterial line (2) with simultaneous closing and opening of a venous line (3) in a single-lumen-arrangement (10), with which untreated blood is removed through the single-lumen-arrangement (10) and the arterial line (2), led through a blood treatment device (5) and treated blood is fed back through the venous line (3) and the single-lumen-arrangement (10),an arterial line container (20) which is arranged in the arterial line (2) in front of the blood treatment device (5),a venous line container (30) which is arranged in the venous line (3) following the blood treatment device (5),a sensor device (31) for detecting an amount of treated blood being above a limit value in the venous line container (30),a sensor device (21) for detecting an amount of untreated blood being below a limit value in the arterial line container (20),an arterial line closure device (22) for closing the arterial line (2) with simultaneous opening of the venous line (3) in response to a signal A which is transmitted by the sensor device (31) to the arterial line closure device (22),a venous line closure device (32) for closing the venous line (3) with simultaneous opening of the arterial line (2) in response to a signal B which is transmitted by the sensor device (21) to a venous line closure device (32) andat least one pump (40) and is characterized in that a control device (50) is provided, with which a phase volume Vact is adjustable automatically in dependence on the current pumping rate QBP of the at least one pump (40) during a phase to a predefined value Vnom (FIG. 1).

The invention discloses a human body model used in ECMO simulation training, which comprises a model body and an imitation heart container arranged on the model body. Venous tube, femoral artery tube, jugular vein tube and carotid tube, the upper end of the femoral vein tube, the lower end of the jugular vein tube and the main venous tube are connected by a three-way valve, the upper end of the femoral artery tube, the lower end of the carotid tube and the aortic tube The tubes 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 artery tube are detachably connected with a needle tube. The mannequin enables trainees to master the clinical operation of ECMO, and at the same time facilitates the replacement of broken tubes.