There is described a method for controlling a liquid delivery system adapted to deliver a liquid in a container, comprising: receiving a desired temperature for a liquid to be delivered and a desired level of liquid within the container; adjusting a mixing valve connected to a source of hot liquid and a source of cold liquid to obtain the desired temperature; operating a flow control valve for delivering the liquid having the desired temperature and closing a drain closure system of the container and closing a drain closure device; monitoring a level of the liquid within the container; and closing the flow control valve when the monitored level of liquid substantially corresponds to the desired level of liquid.

Ambulatory medical devices, which includes ambulatory medicament pumps, and blood glucose control systems that provide therapy to a subject, such as blood glucose control, are disclosed. Disclosed systems and devices can implement one or more features that improve the user experience, such as prompting and/or facilitating the user to order additional infusion sets, sensors, and/or other components to facilitate treatment.

This disclosure addresses a monitoring device for an infusion system. The device is typically used with an infusion device utilizing a clear reservoir bag holding the supplied fluid. The device uses light sources and sensors to accurately determine the level of the fluid, the amount of fluid being supplied, and when replenishment of the fluid is required. In addition, the device may utilize ultrasound sources and sensors as backups to the light system. The device further includes a data processing module that gathers, stores, and reports data relative to the fluid flow properties of the infusion device.

A medical fluid system includes a container holding a fluid at a level; and a radio frequency level sensor operably connected to the container and including an emitting electrode and a receiving electrode, the electrodes operating as a transmission line having an electrical impedance that varies with the level or volume of the fluid in the container, the level sensor configured to measure a phase shift of the transmission line, the phase shift indicative of the level or volume of the fluid in the container.

A drive mechanism (100) for use with a drug container (50) in a drug pump, the drug container (50) having a barrel (58) and a plunger seal (60), including a tether, an electrical actuator (101) and a gear interface. Rotation of the gear interface is controlled by the actuator (101). A gear assembly rotationally engages with the gear interface. The gear assembly includes a main gear and a regulating mechanism. Release of the tether is metered by the gear assembly through the regulating mechanism. A piston (110, 1110, 2110) is connected to the tether and is disposed in the barrel (58) and configured to translate axially within the container. A biasing member is disposed at least partially within the barrel (58) and is retained in an energized state between the piston (110, 1110, 2110) and drive housing, wherein the release of the tether controls the free expansion of the biasing member from its energized state and the axial translation of the piston (110, 1110, 2110).

A dropping rate measuring device for measuring a flow rate of liquid droplets which grow on a lower end of a nozzle and intermittently drop from the lower end of the nozzle includes an imaging unit that images a growing liquid droplet which is growing on the lower end of the nozzle at a plurality of time points and acquires a plurality of pieces of image data of the growing liquid droplet, and a data processor that calculates the flow rate by analyzing the plurality of pieces of image data acquired by the imaging unit.

An injection system is described that receives, from one or more sensors, a first group of one or more signals indicating a current volume of injection fluid dispensed from a fluid reservoir at a first time. The injection system determines, based on the first group of one or more signals, that a difference between a dispensed volume limit and the current volume of the injection fluid dispensed from the fluid reservoir at the first time is less than a necessary volume of fluid required to complete both a systolic injection phase and a diastolic injection phase. The injection system further, responsive to determining that the difference is less than the necessary volume of fluid required to complete both the systolic injection phase and the diastolic injection phase, controls the injection system to refrain from performing each of the systolic injection phase and the diastolic injection phase.

A fluid delivery device includes an automatic needle retraction mechanism configured to automatically retract a delivery end of a needle into a housing. In one embodiment, the needle assembly is configured to automatically withdraw the delivery end of the needle into the housing upon an actuator moving from the first position to the second position. In one embodiment, the needle assembly is configured to automatically withdraw the delivery end of the needle into the housing upon decoupling a bottom surface of the housing from a skin surface.

Systems and methods for monitoring an operational state and/or a fill status of a drug container of a drug delivery device are provided. The drug container can hold a liquid drug. A plunger can be positioned within the drug container. A drive system can advance the plunger to expel the liquid drug from the container. A monitoring system can detect a movement and/or a position of the plunger and/or any component coupled to the plunger. The detection can enable determination of an amount of liquid drug that has been expelled and/or an amount of liquid drug remaining in the drug container. Dosing rates, flow rates, and dosage completion can also be determined.

A medicament delivery device (10) comprises a medicament delivery mechanism including an injection needle (23). A housing (11) contains at least one component of the medicament delivery mechanism. A base plate (12) includes a contact surface (12b) for placement against a patient's body. The housing (11) is moveably connected to the base plate (12) and is moveable relative to the base plate (12) between a first position and a second position. The medicament delivery mechanism is operative upon movement of the housing (11) from the first position to the second position.