26 results about "Dialysis fluids" patented technology

A peritoneal dialysis (“PD”) system includes a PD fluid pump, a PD fluid heater positioned and arranged to heat fresh PD fluid pumped by the PD fluid pump, and a phase change material (“PCM”) device positioned and arranged to receive fresh PD fluid heated by the PD fluid heater. The PCM device includes a PCM having a melting temperature selected so that the PCM solidifies when underheated fresh PD fluid contacts the PCM transferring heat to the underheated fresh PD fluid. Alternatively or additionally, the PD system may include a different PCM device having a PCM with a melting temperature selected so that the PCM melts when overheated fresh PD fluid contacts the PCM thereby removing heat from the overheated fresh PD fluid. A configuration for the PCM device is also disclosed.

This utility model relates to the field of medical device technology, and in particular to an artificial kidney dialysis solution preparation device, including a body assembly, the body assembly including a body body; two mounting slots are formed inside the body body; a synchronous drive assembly is provided at the bottom of the body body; and two permanent magnet rotors are provided at the output end of the synchronous drive assembly. This allows for the simultaneous and independent preparation of solution A and solution B, avoiding mixing and precipitation. Simultaneously, the stirring shaft inside the separate preparation tank is driven by a non-contact magnetic force transmission between the permanent magnet rotor and the permanent magnet ring, allowing the separate preparation tank to be removed from the mounting slot on the body body for easy cleaning and maintenance. Furthermore, the non-contact magnetic force transmission eliminates frictional losses associated with traditional gear or belt drives, extending equipment lifespan and reducing the risk of corrosive liquids eroding metal parts, significantly improving the working life of the preparation device.

An extracorporeal and drug delivery system includes (i) a renal failure therapy machine operable with a blood filter in fluid communication with an arterial line and a venous line, the machine including (a) an effluent pump for pumping effluent from the blood filter at an effluent flowrate, and at least one of (b) a dialysis fluid pump for pumping dialysis fluid to the blood filter at a dialysis fluid flowrate, (c) a predilution pump for pumping replacement fluid into the arterial line at a predilution flowrate, or (d) a postdilution pump for pumping replacement fluid into the venous line at a postdilution flowrate; (ii) an infusion pump operable to deliver an intravenous (“IV”) drug to the patient at an IV drug flowrate; and (iii) a coordinating logic implementor configured to adjust the IV drug flowrate based on an amount of the IV drug removed via the effluent flowrate.

A capacitive priming sensor for a medical fluid delivery system is disclosed. In an example embodiment, a priming sensor includes a housing including a recessed section configured to accept a portion of a patient tube. The housing includes a first electrode located adjacent to a portion of the patient tube when the portion of the patient tube is inserted into the housing and a second electrode located above the first electrode. The priming sensor also includes a capacitive sensor that measures a capacitance between the first electrode and the second electrode. A processor operates with the capacitive sensor and is configured to use the measured capacitance to determine a transition between a dry tube state and a wet tube state. The processor then causes a pump to stop pumping dialysis fluid through the patient tube for the priming sequence after the wet tube state is determined.

A capacitive priming sensor for a medical fluid delivery system is disclosed. In an example embodiment, a priming sensor includes a housing including a recessed section configured to accept a portion of a patient tube. The housing includes a first electrode located adjacent to a portion of the patient tube when the portion of the patient tube is inserted into the housing and a second electrode located above the first electrode. The priming sensor also includes a capacitive sensor that measures a capacitance between the first electrode and the second electrode. A processor operates with the capacitive sensor and is configured to use the measured capacitance to determine a transition between a no-tube state and a dry tube state. The processor then causes a pump to pump dialysis fluid through the patient tube for a priming sequence after the dry tube state is determined

The utility model discloses a semipermeable membrane endotoxin transfer test device, including base, conical test tube, first peristaltic pump and hemodialyzer, the both sides of base upper end are welded with the support, and the support on both sides are in sliding connection with a plurality of clamping blocks, the both sides of base upper end are placed with a pair of conical test tube, the first peristaltic pump is placed on the first peristaltic pump, and the hemodialyzer is placed on the first peristaltic pump. A hose is plugged into the conical test tube on one side, the outer wall of the hose is connected with a first peristaltic pump, and the tail end of the hose is connected with a hemodialyzer. When the testing device for detecting transference of endotoxin in the semipermeable membrane is used, the hemodialyzer, the branch pipe butt joint, the vertical pipeline, the hose and the first peristaltic pump form a dialysate dialysis chamber, and endotoxin in dialysate has inward driving force by utilizing pressure difference and can enter a blood chamber to circulate through the dialysis membrane (semipermeable membrane). If the endotoxin is detected in the blood chamber, the endotoxin passes through the semi-permeable membrane, the micro-pore diameter of the semi-permeable membrane is too large, the passing of the endotoxin cannot be limited by the semi-permeable membrane at the moment, and the product is an unqualified product.

The application discloses an automatic liquid changing device for peritoneal dialysis, which comprises a base, a machine body, a control console and a sealing cover. The device uses a water pump to send the dialysis liquid in the containing bin to the patient's abdominal cavity through two connecting pipes to complete the automatic liquid changing function. When the connecting pipe extracts the dialysis liquid, the dialysis liquid moves upwards along the embedded head, opens the opening and closing sheet, and enters the extraction block. Part of the dialysis liquid enters the upward pipe, and the other part passes through the blocking side wing, so that the dialysis liquid is pushed to move upwards and be extracted. After the dialysis is completed, the dialysis liquid is no longer extracted, and part of the dialysis liquid flows downwards under the action of gravity, so that the resistance of falling is increased through the one-way groove, the blocking side wing is reattached to the inner wall of the extraction head, the blocking ball closes the upward groove, and thus the part of the dialysis liquid is prevented from reentering the patient's body due to gravity.

Dialysis systems are disclosed comprising new fluid flow circuits. Systems may include blood and dialysate flow paths, where the dialysate flow path includes balancing, mixing, and / or directing circuits. Dialysate preparation may be decoupled from patient dialysis. Circuits may be defined within one or more cassettes. The fluid circuit fluid flow paths may be isolated from electrical components. A gas supply in fluid communication with the dialysate flow path and / or the dialyzer able to urge dialysate through the dialyzer and urge blood back to the patient may be included for certain emergency situations. Fluid handling devices, such as pumps, valves, and mixers that can be actuated using a control fluid may be included. Control fluid may be delivered by an external pump or other device, which may be detachable and / or generally rigid, optionally with a diaphragm dividing the device into first and second compartments.

A peritoneal dialysis (“PD”) system includes a housing; a dialysis fluid pump housed by the housing and including a reusable pump body that accepts PD fluid for pumping; a dialysis fluid inline heater housed by the housing and including a reusable heater body that accepts PD fluid for heating; at least one reusable PD fluid line extending from the housing; at least one disinfection connector supported by the housing and configured to accept one of the at least one reusable PD fluid line; and a control unit configured to run a disinfection sequence after a PD treatment, wherein each of the at least one reusable PD fluid line is connected to one of the at least one disinfection connectors, and wherein at least one of the dialysis fluid pump or the dialysis fluid inline heater is actuated by the control unit during the disinfection sequence.

The application discloses a peritoneal dialysis catheter intelligent metering and clamping device, which comprises a structural shell provided with a catheter embedding groove, and a clamping buckle is arranged on the structural shell at the opening side of the embedding groove; the structural shell is integrated with a clamping execution and flow rate control module, a flow monitoring module and a data processing module; the clamping execution and flow rate control module is used for controlling the filling speed, dosage and on-off of a filling pipe or a drainage catheter; the flow monitoring module is used for monitoring the drainage flow of dialysate in a drainage pipeline; the data processing module is used for controlling the opening and closing of various electrical elements and the conversion of flow data; a power supply unit is used for the power supply of the whole device; the structural shell is provided with a touch module used for controlling the opening and closing and adjustment of the clamping execution and flow rate control module and a display module used for the intuitive display of flow rate and flow data. The application is convenient for operators to carry and has few operation environment restrictions, is suitable for various scenes, meets the effective clamping and drainage metering of patients with poor eyesight, insufficient hand strength and poor self-care ability in the peritoneal dialysis treatment process, and has high practicability.

An extracorporeal and drug delivery system includes: (i) a renal failure treatment machine operable with a blood filter in fluid communication with an arterial line and a venous line, the machine including: (a) an effluent pump for pumping effluent from the blood filter at an effluent flow rate; and at least one of: (b) a dialysis fluid pump for pumping dialysis fluid to the blood filter at a dialysis fluid flow rate; (c) a pre-dilution pump for pumping replacement fluid into the arterial line at a pre-dilution flow rate; or (d) a post-dilution pump for pumping replacement fluid into the venous line at a post-dilution flow rate; (ii) an infusion pump operable to deliver an intravenous ("IV") drug to a patient at an IV drug flow rate; and (iii) a coordination logic implementer configured to adjust the IV drug flow rate based on an amount of the IV drug removed via the effluent flow rate.

A peritoneal dialysis (“PD”) machine includes a water pump; a concentrate pump; a water valve, and an inlet to the water valve positioned to receive purified water; a concentrate valve, and an inlet to the concentrate valve positioned to receive PD fluid concentrate; a mixing line located downstream from the water pump and the a concentrate pump; a conductivity sensor positioned to sense mixed purified water and PD fluid concentrate that form fresh PD fluid; a flexible patient line configured to bring fresh PD fluid to and remove used PD fluid from a patient; and a control unit configured to control the water pump, the concentrate pump, the water valve and the concentrate valve, to receive an output from the conductivity sensor, and to run a disinfection sequence in which (i) the inlet to the concentrate valve alternatively receives disinfectant or (ii) the flexible patient line alternatively receives disinfectant.

A dialysis machine operable with a disposable set having at least one container, the dialysis machine including a pump actuator operable to pump dialysis fluid to and / or from the at least one container; a weigh plate positioned to support the at least one container; a plurality of operational load cells positioned to support the weigh plate; a linear actuator positioned to apply a force to the weigh plate; a calibration load cell positioned to measure the force applied by the linear actuator; and a control unit in operable communication with the operational load cells, the linear actuator and the calibration load cell, the control unit configured to cause the linear actuator to apply the force to the weigh plate, compare resulting outputs from the operational load cells and the calibration load cell, and determine a calibration factor from the comparison for offsetting future outputs from the operational load cells.

A medical fluid control port assembly is disclosed. The medical fluid control port assembly eliminates contamination of a fluid path in peritoneal dialysis solution containers by incorporating ways to operate fluid flow without using a frangible. The disclosed fluid control port assembly is made up of an upper stem and a lower stem. The upper stem has a male threaded portion configured for mating to the lower stem having a female threaded portion. The upper stem has at least two snapfit ridges and the lower stem has at least one snapfit ridge. The snapfit ridges are provided to lock the fluid control port in a closed configuration to restrict fluid flow, or in an open configuration to initiate fluid flow. The control port is configured to allow a patient to use their fingers to rotate the upper stem and lower stem during dialysis therapy to easily control fluid flow.

A system includes a dialysis fluid pump. The system includes an input interface device configured to receive a plurality of inputs defining a peritoneal dialysis therapy for a patient. The system includes a controller configured to adapt the peritoneal dialysis therapy for the patient. The controller determines a number of total cycles for the therapy for the patient, determine an amount of ultrafiltration per cycle for the therapy for the patient, and determine a maximum reserve volume for the therapy for the patient wherein the number of total cycles is an integer N; wherein a number of tidal cycles within the number of total cycles is N-1 The maximum reserve volume is an amount of fluid reserved in each of the cycles. The controller is configured to control the therapy for the patient to retain the maximum reserve volume for each of the cycles.

A dialysis system and dialysis machine or cycler are provided that decrease a disposable set's cost and complexity. The dialysis machine or cycler includes a weigh scale on which multiple fluid supply containers containing dialysis fluid, and a drain trolley, are positioned. The fluid supply containers may be elevated relative to the drain trolley. The drain trolley is sized to contain all of the effluent drained from a patient during a dialysis treatment. The fluid supply containers are in fluid communication with one another and arranged one of top of the other. A control unit may control fill, dwell and drain cycles by controlling the operation of a pump and a valve. Dialysis fluid from the bottom-most fluid supply container may be pumped into a patient. The valve may be opened to allow effluent to drain from the patient to the drain trolley by way of gravity.

Dialysis systems are disclosed comprising new fluid flow circuits. Systems may include blood and dialysate flow paths, where the dialysate flow path includes balancing, mixing, and / or directing circuits. Dialysate preparation may be decoupled from patient dialysis. Circuits may be defined within one or more cassettes. The fluid circuit fluid flow paths may be isolated from electrical components. A gas supply in fluid communication with the dialysate flow path and / or the dialyzer able to urge dialysate through the dialyzer and urge blood back to the patient may be included for certain emergency situations. Fluid handling devices, such as pumps, valves, and mixers that can be actuated using a control fluid may be included. Control fluid may be delivered by an external pump or other device, which may be detachable and / or generally rigid, optionally with a diaphragm dividing the device into first and second compartments.

The application discloses a guide tube for peritoneal dialysis tube reset based on magnetic force control, which comprises a dialysate bag assembly, a dialysis tube, a magnetic control guide mechanism and a guide tube. The dialysate bag assembly comprises a liquid filling bag and a water outlet bag, which are connected with an inlet water pipe and an outlet water pipe respectively and then connected with the dialysis tube; the end of the dialysis tube is connected with the guide tube through a separator. The magnetic control guide mechanism comprises a rear end fixing ring, a nickel block, an arc-shaped elastic stainless steel sheet, a front end sleeve ring, a middle section fixing ring and a micro electromagnetic iron; the nickel block is embedded in the inner side of the stainless steel sheet, and the micro electromagnetic iron is arranged on the middle section fixing ring. The micro electromagnetic iron in different directions is powered on through a remote controller, the nickel block is adsorbed by a magnetic field to make the stainless steel sheet bend, the middle section of the guide tube is bent, the end of the guide tube is reversely changed in position, the flexible control of the position of the end of the guide tube in the abdominal cavity is realized, and the guide tube is used for peritoneal dialysis tube reset.

The invention relates to the technical field of peritoneal dialysis, and discloses a peritoneal dialysis catheter fixing band with an alarm function, which comprises a silica gel band, an opening is formed in the front part of the side wall of the silica gel band, a positioning seat is fixedly mounted on the front side wall of the silica gel band, and the peritoneal dialysis catheter fixing band further comprises a mounting sleeve, an equipment plate is fixedly mounted at the upper part of the side wall of the inner cavity of the mounting sleeve, and a dialysis catheter is arranged in the inner cavity of the opening; a clamping mechanism; a monitoring mechanism; an alarm mechanism; and a connecting mechanism. According to the device, through the arrangement of the connecting mechanism, a user can quickly dismantle the mounting sleeve, the user can conveniently maintain components on the positioning seat, through the arrangement of the clamping mechanism, the dialysis catheter can be quickly limited and fixed, and through the arrangement of the alarm mechanism and the detection mechanism, the detection efficiency is improved. When the dialysis catheter works, air is accompanied in dialysate or the dialysate does not flow, an alarm can be given in time, and it is guaranteed that a patient can safely conduct peritoneal dialysis treatment.

A system is provided for characterizing effluent samples from patients undergoing peritoneal dialysis. The system comprises a container (30) for enclosing the effluent sample, an optical system, an electrical system, and a processor (13). The optical system comprises a light source (18, 24) and a photodetector (14, 54), the light source emitting a beam of radiation that passes through the container and irradiates the effluent sample, and the photodetector detecting the radiation after it has irradiated the effluent sample to generate an optical signal. The electrical system comprises at least a pair of electrodes (38a, 38b) attached to the container and configured to measure the electrical properties of the effluent sample to generate a characteristic signal. The processor collectively processes the optical signal and the characteristic signal to operate an algorithm for characterizing the effluent sample.

A system and method for producing fluid for peritoneal dialysis (PD) is disclosed. The system comprises a fluid path including one or more PD-concentrate connectors each connected to one or more sources of PD-concentrate fluid, and a water connector connected to a source of water. The system further includes a forward osmosis FO-unit including a draw side and a feed side separated by a FO-membrane. The FO-unit is fluidly connected to the fluid path. The FO-unit receives the one or more PD-concentrate fluids at the draw side, and receives the water at the feed side. Purified water is transported to one or more PD-concentrate fluids through the FO-membrane by means of an osmotic pressure gradient between the draw side and the feed side. The transported purified water is further purified by the FO-membrane and the one or more PD-concentrate fluids is diluted to produce a diluted PD-concentrate fluid.

A peritoneal dialysis system includes a control unit is programmed to cause (i) a pressure sensor to take a first pressure reading of a reference chamber with a pneumatic valve closed, (ii) a pump actuator to pump fresh dialysis fluid through a fresh dialysis fluid pathway into a patient line expandable chamber, expanding the expandable chamber into a dome, (iii) the pneumatic valve to open, allowing the reference chamber to communicate pneumatically with any air in the dome, (iv) the pressure sensor to take a second pressure reading with the pneumatic valve open, (v) the first and second pressure readings to be used with the ideal gas law to determine an amount of air in the dome, and (vi) the amount of air in the dome and a known volume of the dome to be used to determine an amount of fresh dialysis fluid delivered into the expandable chamber.

The invention relates to the technical field of peritoneal dialysis, and provides a peritoneal dialysis auxiliary device for hemiplegic patients, the peritoneal dialysis auxiliary device comprises a base, a support frame main body mechanism, a lifting adjusting module, a multifunctional suspension mechanism, a one-hand operation fixing module and an integrated operation platform, the support frame main body mechanism extends in the height direction and is arranged in a telescopic manner; the lifting adjusting module is used for adjusting and controlling the lifting height of the supporting frame main body mechanism; a plurality of suspension positions are arranged on the multifunctional suspension mechanism; the intelligent lifting module is used for controlling the lifting height of the multifunctional suspension mechanism through one key; the one-hand operation fixing module comprises a dialysate bag fixing assembly and a pipeline management assembly and is used for automatically clamping a dialysate bag placed on the hanging position, and the pipeline management assembly is used for normalizing a peritoneal dialysis pipeline. The hemiplegic patient can complete the key steps of stable suspension of the dialysate bag, pipeline butt joint, exhaust, drainage and the like only by using a single healthy side hand, the independence and safety of PD treatment of the hemiplegic patient are guaranteed, and the life quality is improved.

The application discloses an automatic liquid changing device for peritoneal dialysis, which comprises a dialysate storage assembly, a peritoneal dialysis pipeline and a waste liquid collecting assembly arranged in sequence from top to bottom, and a reversing device. The reversing device has a dialysis injection station, a static dialysis station and a waste liquid collecting station, and can automatically and repeatedly switch the three stations in sequence. When in the dialysis injection station, only the dialysate storage assembly is communicated with the peritoneal dialysis pipeline; when in the static dialysis station, the three are completely disconnected; and when in the waste liquid collecting station, only the waste liquid collecting assembly is communicated with the peritoneal dialysis pipeline. The application uses gravity as the only driving force for liquid flow, and realizes the automation of the whole process of peritoneal dialysis perfusion, abdominal retention and drainage through the automatic cyclic switching of the reversing device. The application has the advantages of simple structure, low cost, convenient operation, safety and reliability, and is especially suitable for reducing the working intensity of medical staff and patients.

The utility model discloses a novel continuous blood purification pipeline which comprises a purifier and a vein pot which are connected with each other, one end of the purifier is connected with the artery end of a human body, a 5% sodium citrate liquid bag and a pre-replacement liquid bag are connected between the artery end and the purifier, the purifier is connected with a dialysate bag, one end of the vein pot is connected with the vein end of the human body, and the other end of the vein pot is connected with the vein end of the human body. A rear replacement liquid bag is connected to the liquid pipe between the vein pot and the human vein end through a connecting assembly, a replacement liquid assembly of the machine and a replacement liquid extension assembly. According to the utility model, non-planned off-machine operation caused by vein kettle blood coagulation during local citric acid anticoagulation can be reduced, blood loss is reduced, and blood coagulation factor consumption caused by vein kettle blood coagulation and influence on the blood coagulation function are reduced; the use amount of citric acid can be reduced, blood coagulation in a vein pot is prevented, the occurrence rate of citric acid anticoagulation complications is reduced, the use of pumps is reduced, the risk of balance imbalance caused by inconsistent pump speeds is reduced, a finished product replacement liquid with higher calcium concentration can be used, and bone calcium loss is reduced.