A method for making a fluid delivery device including a reusable portion and a disposable portion. The disposable portion is adapted to be secured to a user and includes a conduit fluidly connecting a reservoir containing a fluid and a moveable pumping member. The moveable pumping member can expand an expandable structure with the fluid. The reusable portion is selectively engageable to the disposable portion and contains a drive device for engaging the moveable pumping member of the disposable portion. The drive device has a rotatable pumping actuation member with a plurality of projections for engaging the moveable pumping member and thereby moving the fluid to expand the expandable structure.

Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of the apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of a diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber.

A method of dispensing a therapeutic fluid from a line includes providing an inlet line connectable to an upstream fluid source. The inlet line is in downstream fluid communication with a pumping chamber. The pumping chamber has a pump outlet. The method also includes actuating a force application assembly so as to restrict retrograde flow of fluid through the inlet while pressurizing the pumping chamber to urge flow through the pump outlet. A corresponding system employs the method.

Micropump (10) including a support structure (14), a pump tube (16), and an actuation system (18) comprising one or more pump chamber actuators (28), the pump tube comprising a pump chamber portion (24) defining therein a pump chamber (26), an inlet portion (20) for inflow of fluid into the pump chamber, and an outlet portion (22) for outflow of fluid from the pump chamber. The inlet, outlet and pump chamber portions form part of a continuous section of tube made of a supple material. The one or more pump chamber actuators are configured to bias against the pump chamber portion to expel liquid contained in the pump chamber via the outlet portion, respectively to bias away from the pump chamber portion to allow liquid to enter the pump chamber via the inlet portion. The pump chamber portion has a cross-sectional area Ap in an expanded state that is larger than a cross-sectional area Ai of the pump tube at the inlet and outlet portions.

A dual active valve positive displacement pump comprising: A housing holding the pump's components. A piston with an internal cavity divided into two fluidly-isolated volumes by a freely-moving diaphragm, one of the two volumes being fluidly connected with a volume between piston and housing which contains driver pressure from a pressure source. The piston is reciprocally movable inside the housing under positive or negative driver pressure. An active inlet valve operable by driver pressure actuates when the driver pressure is more than the maximum pressure at the pump inlet port. An active outlet valve operable by driver pressure actuates when the driver pressure is less than the minimum pressure at the pump outlet port. The diaphragm separates pumped fluid from operational fluid used to move the diaphragm inside the piston cavity and transmits pressure at the inlet port when the inlet valve is open, and at the outlet port when the outlet valve is open.

A therapeutic device for treating an acute medical condition of a patient such as cardiac arrest is provided. The device includes one or more sensors that monitor parameters such as heart rhythm that relate to the patient's medical condition. The device also includes a plurality of medication reservoirs, each reservoir including a conduit, wherein each reservoir holds a predetermined medication that may be used to treat the condition. A manifold is connected with the reservoirs via their respective conduits. A delivery line is connected with the manifold to deliver fluids from the manifold to the patient intravenously. One or more medication pumps are in fluid connection with respective ones of the reservoirs. A processor is connected with the sensors. The processor includes a memory that stores processing instructions to interpret the parameters and to determine a recommended medication to deliver to the patient based on the parameters, the recommended medication being one of the predetermined medications. The processor is operatively connected with the medication pumps. When a recommended medication is determined, the processor actuates the medication pump connected with the reservoir including the recommended medication to deliver the medication to the patient via the manifold and the delivery line.

A medical liquid infusion apparatus includes: a housing provided such that an interior thereof is at least partially open at a first time point and is sealed at a second time point later than the first time point; a needle assembly located in the housing and provided such that at least a portion thereof is discharged to an outside of the housing at a third time point later than the second time point by a user's operation; a reservoir that is sealed in the housing after the second time point, receives a medical liquid, and is fluidly connected to the needle assembly; a driving module that is sealed in the housing after the second time point, interposed between the needle assembly and the reservoir, and generates a driving force for discharging the medical liquid after the third time point; a battery module sealed in the housing after the second time point; and a control module that is sealed in the housing after the second time point, and electrically connected to a transmission module and the battery module after the third time point so as to control the driving module.

A bidirectional electroosmotic pump may be provided. The bidirectional electroosmotic pump may be made of materials that are biocompatible and non-ferrous. The bidirectional electroosmotic pump may be part of an implantable medical device for the purpose of medicine delivery. The bidirectional electroosmotic pump may contain a working fluid and may facilitate the delivery of a separate payload fluid. In an exemplary embodiment, the bidirectional pump may contain bellows which may allow the pump to deliver the payload fluid through a series of valves and/or catheters. In another embodiment the bidirectional electroosmotic pump may contain a pump sensing mechanism to monitor the state of the pump.

An infusion system and method for providing different medical fluids to a patient. The infusion system, which can be used in complex infusion therapies, includes a catheter with a catheter tube and at least one lumen extending longitudinally through the catheter tube between a proximal tube end and a distal tube end. A plurality of pump devices are each connected to the at least one lumen so as to convey fluid. A control device is connected to the pump devices and adapted to control the pump devices so that the different medical fluids can be delivered through the at least one lumen by the pump devices in time division multiplex. The catheter can include the pump devices. Each pump device can be configured as a micropump mounted at the proximal tube end.

The invention relates to a pumping device including a pump (1) comprising—a pumping chamber (11) having a variable volume, —an inlet (2) communicating with the pumping chamber (11) and comprising a valve, —an outlet (5) communicating with the pumping chamber and comprising a valve, —an actuator adapted to change the volume of the pumping chamber, —a fluidic pathway comprising said inlet (2), said pumping chamber (11), said outlet (5) and a downstream line (7) situated downstream of the outlet valve, —a pressure sensor (4) for measuring the pressure between the valves of said pathway, —processing means for processing the received pressure data from the pressure sensor (4). The invention also covers a method for detecting a dysfunction in a pumping device as defined above.