A system for delivering a medicinal fluid to a patient includes a variable volume pressure delivery chamber, a variable volume medication chamber, an optional medication reservoir, a movable delivery element, a fixed reference volume chamber, a pressure source, and a control sub-system. The variable volume pressure delivery chamber is configured to store pressure controllably. The variable volume medication chamber is fluidically isolated from the pressure delivery chamber and is configured to store medicinal fluid. The movable delivery element is disposed between the medication chamber and the pressure delivery chamber. The pressure source is coupled to the pressure delivery chamber. The control system is configured to selectively cause the pressure source to deliver pressure to the pressure delivery chamber causing the movable delivery element to apply pressure to the medicinal fluid in the medication chamber thereby causing the medicinal fluid to exit the medication chamber at an outlet along the fluid communication path to the patient.

A portable hemodialysis system is provided including a dialyzer, a closed loop blood flow path which transports blood from a patient to the dialyzer and back to the patient, and a closed loop dialysate flow path which transports dialysate through the dialyzer. In addition, the hemodialysis system includes two reservoirs which can be alternately placed in the dialysis flow path using various controllable fluid valves. The weight, and therefore the level of dialysate, of each reservoir is measured by a preferred level sensor having a lever arm, a load cell, and a tilt sensor. The load cell and tilt sensor are electrically connected to a processor for sending force and tilt measurements to the processor. The processor may analyze the tilt measurements to correct for any inaccurate measurements of the load cell caused by the tilt.

A portable hemodialysis system is provided comprising a dialyzer, having a dialysate-replenishing system for replenishing minerals of dialysate in the dialyzer, the dialysate-replenishing system includes: a sorbent filter configured to remove ammonia from the dialysate, the sorbent filter having an outlet that outputs the dialysate to a dialysate flow path; a first reagent source containing a first reagent solution; a first pump configured to inject the first reagent solution into the dialysate flow path; a first mixer coupled to the dialysate flow path and downstream of the first pump, the first mixer configured to mix the dialysate with the first reagent solution; a conductivity sensor configured to measure a level of dissolved solids in the dialysate after the first mixer; and a controller configured to adjust a flow rate of the first reagent solution by adjusting the first pump based at least on the level of measured levels.

Systems and method for verifying the timely placement of a container of biolocal cells or fluid within a treatment chamber of a biological fluid treating device are disclosed. The systems and methods utilize a sensor that detects the presence of a container at an appropriate and pre-determined time and, optionally, detects the weight of the container and cells.

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.

An apparatus for humidification of air to be delivered to a patient's airways may include a reservoir, and a humidifier chamber. The humidifier chamber may include a humidifier wick and a heating element for heating the humidifier chamber. The humidifier wick may comprise a fibrous sheet material. The humidifier chamber and wick may be vertically oriented in use such that a first end of the wick is above the second end of the wick. A deioniser may be provided to deionise the liquid prior to the humidifier wick. The apparatus may pasteurise liquid to be delivered to the humidification wick.

Extracorporeal blood treatment systems and methods to display graphical user interfaces displaying a plurality of fluids areas, each including a flow rate, and displaying adjustment notifications proximate one or more fluid areas. For example, when a user adjusts a flow rate to a limit, one or more notifications may be displayed proximate other flow rates that may be adjusted to modify the limit.

A peritoneal dialysis machine having a machine housing and having a heating receiver as well as having a plurality of solution bags is provided. The peritoneal dialysis machine furthermore has a hose set which is connected to the solution bags, wherein the plurality of solution bags are arranged in the heating pan and wherein the hose set does not have any heating bag into which the liquid draining from the solution bags runs.

The drip monitoring system comprises a weighing device to measure a carrying weight. The weighing device includes a gravity sensor to sense a motion data of the weighing device. The processing element gathers the carrying weight to compare with an empty weight. The processing element gathers the motion data of the weighing device when the carrying weight is less than the empty weight. The processing element determines whether the weighing device is in a calibration orientation or not according to the motion data. When the weighing device is in the calibration orientation, the processing element controls the weighing device to perform a return to zero calibration process.

The disclosed subject matter relates to extracorporeal blood processing or other processing of fluids. Volumetric fluid balance, a required element of many such processes, may be achieved with multiple pumps or other proportioning or balancing devices which are to some extent independent of each other. This need may arise in treatments that involve multiple fluids. Safe and secure mechanisms to ensure fluid balance in such systems are described.