333 results about "Dialysis device" patented technology

A dialysis device for operation in multiple modes and for maintaining a known gradient of potassium ion or other electrolyte between the blood of a patient and a dialysate fluid is described. The dialysis device is capable of being used for hemodialysis or peritoneal dialysis, and the dialysis device is capable of operation with a dialysate purification unit outside of a clinical setting or with a supply of water that can be supplied in a clinical setting. The dialysis device has a composition sensor containing a potassium-sensitive electrode for measuring a potassium ion concentration in one or more of the patient's blood and the dialysate fluid and an infusate pump operated to adjust a potassium ion concentration in the dialysate fluid based at least in part on data from the composition sensor.

There is provided a flow system of a dialysis device including a dialysate conduit which is capable of being in fluid communication with the peritoneal cavity of a patient's body and of being in fluid communication with a flow path, the flow path allowing dialysate to flow from a patient's body to a sorbent capable of removing contaminants within the dialysate in an outflow mode and in an inflow mode returning the dialysate substantially free of contaminants to the patient's body. The device also includes a pump for moving the dialysate along the flow path in both the outflow mode and inflow mode and a plurality of valves disposed along the flow path. There is also provided a portable dialysis device.

A dialysis device for operation in multiple modes and for maintaining a known gradient of potassium ion or other electrolyte between the blood of a patient and a dialysate fluid is described. The dialysis device is capable of being used for hemodialysis or peritoneal dialysis, and the dialysis device is capable of operation with a dialysate purification unit outside of a clinical setting or with a supply of water that can be supplied in a clinical setting. The dialysis device has a composition sensor containing a potassium-sensitive electrode for measuring a potassium ion concentration in one or more of the patient's blood and the dialysate fluid and an infusate pump operated to adjust a potassium ion concentration in the dialysate fluid based at least in part on data from the composition sensor.

The present invention relates to dialysis devices comprising peristaltic pumps of linear build with piezoelectric actuators.

A hemodialysis apparatus includes a dialysis device, a detecting device, an evaluation device and a memory device. The dialysis device dialyzes and ultrafiltrates blood of a patient according to an ultrafiltration volume based on an estimated dry weight while performing hemodialysis treatment on the blood circulating extracorporeally. The detecting device obtains time series data by measuring a parameter related to concentration of the blood circulating extracorporeally at a plurality of points in time series in a process of the hemodialysis treatment by the dialysis device. The evaluation device evaluates appropriateness of the hemodialysis treatment by evaluating whether the estimated dry weight approximates to a dry weight after the hemodialysis treatment by the dialysis device. The memory device stores a plurality of time series data when the hemodialysis treatment is evaluated to be appropriate by the evaluation device.

A technology that provides various modular biomimetic microfluidic modules emulating varieties of microvasculature in body. These microfluidic-base capillaries and lymphatic Technology modules are constructed as multilayered-microfluidic microchannels of various shapes, and aspect ratios using diverse biocompatible microfluidic polymers. Then, various semipermeable membranes are sandwiched in between these multilayered microfluidic microchannels. These membranes have different chemical, physical characteristics and MWCO values. Consequently, this design will produce much smaller dimension channels similar to human vasculature to achieve biomimetic properties like of human organs and tissues. By interchanging microfluidic-layers or the membranes various diverse modules are designed that act as building blocks for constructing various medical devices, various forms of dialysis devices including albumin and lipid dialysis, water purification, bioreactors, bio-artificial organ support systems. Connecting various modules in diverse combinations, permutations, in parallel and/or in series to ultimately design many unrelated medical devices such as dialysis, bioreactors and organ support devices.

The invention discloses a diffusion dialysis and electrodialysis integrated treatment method and device for acid waste liquid containing metallic ion. The diffusion dialysis and electrodialysis integrated treatment device is characterized in that a diffusion dialysis device adopts a plate and frame type diffusion dialysis device or a spiral reeling type diffusion dialysis device; a buffer tank isadopted to connect the diffusion dialysis device and an electrodialysis device to form an integrated device for treating the acid waste liquid containing metallic ion; the concentration and dilution capability of the electrodialysis device is used for diluting the dialysate in the diffusion dialysis process, and then the diluted dialysate serves as receptor liquid in the diffusion dialysis process, so that the solution on the receptor liquid side of the diffusion dialysis device is reused and water consumption amount in the diffusion dialysis process is greatly reduced; and meanwhile, the operation time of the electrodialysis process can be prolonged, the concentration of recovered acid can achieve the direct use requirement, fresh acid liquid does not need to be added into recovered acidafter the continuous diffusion dialysis operation, and the acid obtained by recovery is fully utilized.

The invention relates to a method for treating and recycling glass thinning and etching waste liquor. The method comprises the steps of: (1) mixing glass thinning and etching waste liquor with alkali metal salt, so as to generate fluosilicate precipitate in fluorosilicic acid in the glass thinning waste liquor to be separated out; (2) settling and filtering the fluosilicate precipitate to carry out solid-liquid separation; (3) introducing a filtrate to a diffusion dialysis device, removing redundant alkali metal ion in the filtrate to acquire acid liquor; (4) supplementing components to the acid liquor, so as to achieve the glass thinning and etching usage requirements and recycle; (5) reacting the fluosilicate precipitate acquired by filtering in the step (2) with soda ash solution to generate metal fluoride and silica gel precipitate; (6) separating the generated metal fluoride and the silica gel precipitate, wherein the metal fluoride is used for treating fluosilicic acid, and the silica gel is to be sold. Compared with the prior art, the method has the advantages that etching waste liquor can be recycled, the exhaustion of waste liquor and waste residue can eb reduced, the environment pollution risks are reduced, and the production cost is saved.

A control unit (30) is arranged to control a dialysis fluid distribution system (12) comprising two volumetric pumps (P1, P2) and a dialyzer (13). The control unit (30) is operable in a calibration mode, to establish a bypass flow path that bypasses the dialyzer (13) and extends between the pumps (P1, P2) and to operate the pumps (P1, P2) at first and second calibration speeds so as to balance the flow rates generated by the pumps (P1, P2), e.g. based on a measured pressure or fluid level in dialysis fluid distribution system (12). The control unit (30) determines, based on the first and second calibration speeds, a relation between the stroke volumes of the pumps (P1, P2). The control unit (30) is further operable in a treatment mode, to establish a main flow path that extends between the first and second pumps (P1, P2) via the dialyzer (13) and to control the first and second pumps (P1, P2), based on the relation between their stroke volumes, to operate at a respective treatment frequency so as to generate a selected ultrafiltration rate in the dialyzer (13).

The invention discloses a solar energy and osmotic energy (reverse electro dialysis method) combined power generation device which comprises a solar energy distillation device and an osmotic energy reverse electro dialysis device. The bottom of a pool body of the osmotic energy reverse electro dialysis device is black, light absorption ability of the black is good, the block and an obliquely-arranged light-transmitting plate located at the top of the pool body jointly play the effect to absorb sunlight, and water vapor evaporated from a seawater pool and a fresh water pool is condensed on the light-transmitting plate to flow into the fresh water pool. The solar energy and osmotic energy reverse electro dialysis method combined power generation device has the advantages that due to the fact that fresh water evaporated from the seawater pool flows into the fresh water pool, the power generating process implementation can be retarded in the process, the fresh water salinity of the fresh water pool is improved, the seawater of the seawater pool is reduced, and accordingly osmotic energy generating efficiency is improved.

The object of the present invention is to provide a hemodialysis device capable of correctly grasping the continuous aging of hollow fiber membrane performance during dialysis and recovering its performance quickly and accurately. The hemodialysis device is connected to the arterial side of the dialyzer (1) with an arterial side blood circuit (2) with a blood pump (7) and to the venous side of the dialyzer (1) with a venous side blood circuit (3), And the dialysate supply conduit (4) and the dialysate discharge conduit (5) are respectively connected on the side of the dialyzer (1), and a detector (15) for measuring the pressure in the above-mentioned blood circuit is arranged in the hemodialysis device, and the pressure in the blood circuit is measured. The detector (16) of the pressure in the above-mentioned dialysate conduit calculates the pressure difference between the membranes according to the pressure measured by these detectors. When the pressure difference between the membranes rises above a certain value, the dialyzer (1) inverse filtering. The flushing action is performed by reverse filtration, so that the clogging of the pores of the dialysis membrane of the dialyzer (1) is eliminated, and the performance of the dialyzer (1) is restored.

The invention belongs to the field of biomedical engineering, and discloses an apparatus and a method for in vitro storage and culture of an organ. According to the present invention, the human body blood circulation system is simulated to provide the in vitro organ environment close to the in vivo organ environment; the in vitro organ environment comprises the constant temperature and the circulation system; the circulation system comprises the oxygenator, the pump, the pressure control device, the organ placement box, the dialysis device, the liquid storage chamber and the agent feeding device; through the pressure control device, the perfusion pressure and the sufficient perfusion amount are maintained when the organ is subjected to the perfusion with the perfusion liquid, such that theorgan can be store in vitro for a long time and can maintain the health, and the culture of the in vitro constructed organ and the collection of the organ secretions are achieved; and the apparatus for reasonably achieving the in vitro organ storing and culturing and the technical scheme thereof are provided.

A medical device having an operation input unit for an operator to enter instructions and a operation unit for performing prescribed operations required for medical treatment based on input from said operation input unit, including a dialysis device that purifies patient's blood by means of extracorporeal circulation. Further having a human body detection unit for detecting the operator's presence in the vicinity of operation input unit, and a control unit that provides control for allowing input operation unit to instruct the operation unit's operations, or allowing the operation unit to operate based on the input entered into operation input unit, only when said human body detection unit is detecting the operator.

A dialysis apparatus for treating a patient with liver and/or kidney disease. In one embodiment a liver dialysis apparatus comprises an artificial liver. The artificial liver comprises a blood compartment, a vegetable protein compartment, and a clear dialysis compartment. In another embodiment the liver dialysis apparatus comprises cartridge made up of at least one layer of vegetable protein. In a further embodiment of the invention a dialysate regeneration device is provided which comprises at least one layer of vegetable protein. The vegetable protein is preferably a soy protein. The soy protein may be unmodified soy protein with urease enzyme activity, modified soy protein with or without urease activity, alone or in combination.