194 results about "Blood filtering" patented technology

The present invention provides intravascular embolic protection apparatus including a blood filter element having an accommodating passageway adapted to permit passage of a procedure device therethrough and to substantially seal against passage of particles between the embolic protection apparatus and the procedure device by accommodating to a size and shape of the procedure device. Furthermore, the present invention provides a method of performing an endovascular procedure on a patient including the steps of delivering an embolic protection apparatus to a location within a vascular lumen of the patient; passing a procedure device through an accommodating passageway of the apparatus, the accommodating passageway accommodating to a size and shape of the procedure device; performing the endovascular procedure; and removing the procedure device from the patient.

Volumetric accuracy in hemodialysis systems is provided by swapping pumps between the replacement fluid side and the output side for a hemofiltration system and between the return fluid side and the sorbent side for a closed-loop, sorbent-based system, such that same quantity of fluid is pumped at each point after the end of an even number of pump swaps. A method for calculating the time interval between swaps is provided based on an allowable difference in amount pumped in the two functions at any given time. A mechanism is provided for compensating for the differences in head pressure presented to the pumps for fluid coming from the replacement-fluid containers or the reservoir and that coming back from the patient through the dialyzer. The pump-swapping system provides an accurate means that can be inexpensively implemented, including using a disposable device.

A method and device for adjusting a volumetric flow balancing system for an extracorporeal blood treatment system receives a pressure signal and calculates a compensation factor that is used to adjust the relative flow rates of the volumetrically balanced fluids. For example, in a hemofiltration system, the flow of waste and and replacement fluid may be balanced volumetrically. Ultrafiltrate may be pumped in a bypass circuit in such a system. The rate of ultrafiltrate flow may be adjusted by the compensation signal. The compensation signal may be empirically derived.

A method for determining a treatment parameter on a haemofiltration device, as well as a haemofiltration device for applying the method, based on the recognition that a determination method known from haemodialysis can, with little modification, be transferred to haemofiltration. To this effect a physical-chemical characteristic of the substitution fluid and of the fluid which is removed from the haemofilter by way of an ultrafiltrate outlet pipe, is determined. Furthermore, this characteristic is acquired before, after or during a change of this characteristic in the substitution fluid, and is evaluated. As a result, the ion dialysance and thus the urea clearance of a haemofiltration device, which can also be operated as a haemodiafiltration device, can be determined.

A disposable fluid circuit kit for extracorporeal blood treatment systems that supply replacement fluid to a patient is described. The circuit has a blood portion that carries blood and subjects it to some treatment, such as dialysis or hemofiltration. A portion carries filtrate or dialysate. A replacement fluid portion that carries fluid used to compensate for fluid loss is connectable to a supply of replacement fluid. a sterilizing filter in the replacement fluid portion sterilizes the replacement fluid before introduction into the patient acting as a guard against touch contamination of the connected replacement fluid container. Preferably, the filter has a pore size effective to eliminate pyrogens.

Blood filter devices and methods of use.

Systems and methods for cleaning and disinfecting a medical therapy device that delivers any one of hemodialysis, hemodiafiltration and hemofiltration. The system has a base module that has at least one segment of a controlled compliant flow path and at least one pair of jumpered ports configured on the base module. One or more components have connections connectable to the jumpered ports of the base module to provide for fluid communication between the segment of the controlled compliant flow path in the base module and a flow path defined by the one or more components. The base module is connected to the one or more components that define a flow path configurable for carrying out in part at least one function performed during any one of hemodialysis, hemodiafiltration or hemofiltration.

Single filter and multi-filter endolumenal methods and systems for filtering fluids within the body. In some embodiments a blood filtering system captures and removes particulates dislodged or generated during a surgical procedure and circulating in a patient's vasculature. In some embodiments a filter system protects the cerebral vasculature during a cardiac valve repair or replacement procedure.

Single filter and multi-filter endolumenal methods and systems for filtering fluids within the body. In some embodiments a blood filtering system captures and removes particulates dislodged or generated during a surgical procedure and circulating in a patient's vasculature. In some embodiments a filter system protects the cerebral vasculature during a cardiac valve repair or replacement procedure.

A haemofiltration machine designed to work with a haemofilter comprises two compartments separated by a semipermeable membrane, one compartment having an inlet connected to a withdrawing tube for taking blood from the patient and an outlet connected to a blood return tube, the other having an outlet connected to a tube for removing used liquid. The machine itself comprises a solution generator for preparing a first injectable solution from at least one concentrated solution; a circulation pump for injecting the first solution at a flow rate of Qpre into the withdrawing tube; an infusion pump for injecting a patient with a second solution containing a ionic substance [A] with a fixed concentration [A]post different from its concentration [A]pre in the first solution; and a control unit for determining an infusion flow rate Q(post) for the second solution such that the concentration of the ionic substance [A] inside the patient tends towards a required concentration [A]des, as a function of [A]post, [A]des, Qpre, and the blood flow rate QB.

Vascular filters and deflectors and methods for filtering bodily fluids. A blood filtering assembly can capture embolic material dislodged or generated during an endovascular procedure to inhibit or prevent the material from entering the cerebral vasculature. A blood deflecting assembly can deflect embolic material dislodged or generated during an endovascular procedure to inhibit or prevent the material from entering the cerebral vasculature.

A method for preventing contrast associated nephropathy includes the steps of providing a multi-lumen dual balloon catheter and inserting the catheter into a patient's coronary sinus. The method also includes the steps of inflating the two balloons to block blood flow from the coronary sinus into the right atrium and draining blood containing contrast solution from between the two balloons through the catheter while the blood flow is blocked. A hemo filtration unit is used to remove contrast solution from the drained blood and the filtered blood returned to the right atrium. A multi-lumen dual balloon catheter is also disclosed.

Single filter and multi-filter endolumenal methods and systems for filtering fluids within the body. In some embodiments a blood filtering system captures and removes particulates dislodged or generated during a surgical procedure and circulating in a patient's vasculature. In some embodiments a filter system protects the cerebral vasculature during a cardiac valve repair or replacement procedure.

The invention relates to an adsorbent used for clearing middle and macro molecule toxin in body of uremia patients and a preparation method thereof. According to the molecule size of middle and macromolecules such as beta2-MG, PTH, AGEs, Hcy and IL-6 and performance characteristics thereof, a functional adsorbent which can efficiently clear main middle and macro molecule toxins such as beta2-MG,PTH, AGEs, Hcy and IL-6 in the blood of the uremia patients is prepared by taking a mesoporous polystyrene hydrophobic resin as a carrier, which undergoes chloromethylation activation, and then performing chemical crosslinking grafting of vinylamine; and the adsorbent has large adsorption capacity, good mechanical strength, good biocompatibility and high adsorption selectivity. The adsorbent is used for treating uremia by blood perfusion, can take the advantages of blood filtering mainly for clearing micromolecular toxin, and provides a new method for treating uremia by combination of hematodialysis and blood perfusion.

The invention relates to a IL-6/PCT combined detection time-resolved fluorescence immunochromatography quantitative detection kit and a detection method, which utilize the sensitivity of a time-resolved fluorescence immunochromatography technology and rare earth vanadate nano fluorescence labeling materials and combine a dry-type immunofluorescence analyzer to realize high sensitivity, accurate quantification, simplicity and convenience and rapidness. The detection kit can accurately and quantitatively detect the contents of interleukin 6 and procalcitonin in human serum, plasma and whole blood samples, the samples can be processed by the blood filtering membrane sample pad without pretreatment and dilution by diluent, the fluorescence interference of the samples can be avoided by using atime-resolved fluorescence microsphere detection technology, the rare earth vanadate nano material has the advantages of low background, strong fluorescence signal, high signal-to-noise ratio and thelike, the rare earth vanadate nano particles are connected with the antibody through a covalent bond, and the labeled product is stable, so that the detection kit has the characteristics of wide detection range, high sensitivity, high accuracy, quick and simple detection and the like.