34 results about "Dialysis fluids" patented technology

A peritoneal dialysis (“PD”) system includes a housing, a dialysis fluid pump, a dual lumen patient line extending from the housing, and a filter set including a filter located along a first line. A second line of the filter set is parallel with the first line, where the first line is in fluid communication with a first lumen of the dual lumen patient line and the second line is in fluid communication with a second lumen of the dual lumen patient line. The PD system also includes a pressure sensor positioned to sense a static or substantially static negative PD fluid pressure in the first lumen while used PD fluid is pulled through the second lumen of the dual lumen patient line. A control unit is configured to use the sensed static or substantially static negative PD fluid pressure in a pressure control routine for the dialysis fluid pump.

The invention belongs to the technical field of medical auxiliary instruments, and discloses a patient peritoneal dialysis training device which comprises a base frame, a Y-shaped tube and a blue clamp, the base frame is connected with an abdominal cavity model, a hook, a waste liquid bag and intelligent broadcasting equipment, the hook is used for hanging a bag body containing dialysate, and the abdominal cavity model comprises a display bottle body; the display bottle body is connected with a semi-permeable membrane and a rubber plug, the rubber plug is connected with an indwelling short tube, a Y-shaped tube is connected with the bag body, the waste liquid bag and the abdominal cavity model, a blue clip controls the pipeline circulation state of the Y-shaped tube, peritoneal dialysis operation steps and standard videos and audios are arranged in the intelligent broadcasting equipment, and the intelligent broadcasting equipment is connected with a display screen, a control knob and a loudspeaker. The display bottle body of the abdominal cavity model is filled with dialysate to simulate peritoneal dialysis operation, the operation steps and related specifications of peritoneal dialysis are output through the intelligent broadcasting equipment, peritoneal dialysis training is carried out through mutual cooperation of the display bottle body and the intelligent broadcasting equipment, the training process is visual, operation is easy, and the training effect is good.

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

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 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.

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.

The invention aims to provide an auxiliary device for changing peritoneal dialysis fluid, and relates to the technical field of medical instruments, a medical infusion monitor, a collecting box, a fluid storage tank and a support frame are detachably mounted on an infusion support, the infusion support is communicated with the fluid storage tank through a drip cup, and a heating base is arranged in the fluid storage tank to heat and preserve heat of new fluid in the fluid storage tank; the dripping speed in the drip cup can be monitored through the medical infusion monitor, and the new liquid changing speed can be controlled through the flow speed controller; the flow monitor is arranged in the collecting box, so that the speed of discharging the waste liquid can be monitored, and the speed of discharging the waste liquid can be adjusted through the flow speed controller on the collecting box; discomfort and even injury of a patient caused by too high and too low speed of changing new liquid and too high and too low speed of discharging waste liquid are avoided; the two clamps on the support frame can respectively clamp the outer end of the catheter with the screwed-off iodophor cap and the liquid changing connecting pipe, so that a connector is prevented from being polluted.

A CRRT apparatus comprising a control unit configured to execute a flow-rate setup procedure by receiving a patient prescription comprising clinical prescription parameters, by allowing entry of a set value for a prescribed dialysis dose (Dset) to be delivered, and of a target value for a parameter (nNBL; CpHCO3_PAT) indicative of a steady state acid-base balance in the blood of the patient who has to undergo a CRRT blood treatment, and by determining operating parameters calculating a set value of relevant fluid flow rates including one or more of a fluid flow rate (Qcit) through the anticoagulant infusion line, a fluid flow rate (QPBP) through the PBP infusion line, a fluid flow rate (Qrep.pre) through the pre-dilution infusion line, a fluid flow rate (Qrep.post) through the post-dilution infusion line, a fluid flow rate (QHCO3) through the post-dilution bicarbonate infusion line, a fluid flow rate (Qca) through the ion balancing infusion line, a blood fluid flow rate (Qb) through the extracorporeal blood circuit, a fluid flow rate (Qdial) through the dialysis liquid supply line, and a fluid flow rate (Qeff) through the effluent fluid line, wherein calculating the set value of the fluid flow rates is based at least on the set value of the prescribed dialysis dose (Dset) and on the target value for the parameter (nNBL; CpHCO3_PAT) indicative of a steady state acid-base balance in the blood.

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.

Methods and drain systems for fluid flow monitoring and remote draining are described. In one example, the present disclosure describes a medical device drain system for monitoring, measuring, or otherwise managing the drainage of medical waste fluids, for instance, spent dialysate exiting a patient during a dialysis treatment. In some embodiments, the dialysis system may be a peritoneal dialysis (PD) system, including a gravity-based dialysis system, an APD system and / or a CAPD dialysis system. The drain system may include sensors for determining properties of the fluid drained from a patient. The drain system may include a remote liquid pump system configured to allow for pump-based draining of fluid from a patient to a drain located remote from the patient. The remote liquid pump system may be configured to receive at least one wireless signal to operate at a remote distance from the medical device. Other embodiments are described.

The invention relates to the technical field of peritoneal dialysis, and discloses an automatic negative pressure peritoneal dialysis solution exchanger which comprises a machine body box, a first cavity is formed in the left side of an inner cavity of the machine body box, a second cavity is formed in the right side of the inner cavity of the machine body box, and a positioning box is slidably mounted on the lower end face of the machine body box. The exchange mechanisms are arranged on the left and right sides of the side wall of the positioning box; the top cover is detachably mounted on the upper end surface of the machine body box; the adjusting mechanism is arranged on the side wall of the top cover; and the heating mechanism is arranged in an inner cavity of the first cavity and an inner cavity of the second cavity. According to the peritoneal dialysis device, by arranging the exchange mechanism, dialysate can be stably pumped into the abdomen of a patient, drainage liquid can be pumped out at the same time, the safety performance of the patient during self dialysis is improved, by arranging the heating mechanism, the pumped dialysate can be heated, and the situation that the peritoneal dialysis effect is reduced due to the fact that too cold dialysate enters the abdomen of the patient is avoided.

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.