A medical pump, comprising: a fluid housing having a plurality of intake openings, sealed by at least one intake valve, and an outlet opening sealed by an outlet valve; a piston which is sealing the fluid housing and connected to a drive mechanism, the drive mechanism pulls the piston to draw fluid from one of the plurality of intake openings and pushes the piston to discharge the fluid into the outlet opening; and a selecting valve enclosing at least two tubes, each providing fluid to one of the plurality of intake openings, wherein the selecting valve closes one of the at least two tubes while opening another of the at least two tubes.

A disposable single-piston dual-action reciprocating pump part includes a single piston, an output port, and a balloon damper. The output port is configured for outputting fluid pumped by the single piston. The balloon damper is fitted in the output port, and the balloon damper is configured to suppress a pulsation in a flow rate of the outputted fluid.

A fluid injection system includes an injector housing, a sleeve, and a lighting assembly. The sleeve is coupled to the injector housing and is configured to receive and secure a fluid reservoir. The lighting assembly is coupled to the injector housing. The lighting assembly includes a light source configured to illuminate an interior of the fluid reservoir by directing light emitted by the light source into the fluid reservoir.

A hand-control device for controlling the operation of an injection system is described herein. The hand-control device includes one or more input components that receive input to control various operations of the injection system, including commanding the injection to perform a particular operation, changing an operational aspect of the injection system, and selecting an operational mode for the injection system. A communication unit of the hand-control device generates and conveys a signal for the injection system, and receives a command signal from the injection system. An output component outputs an indication, such as a light emission, a sound, or haptic feedback, in response to receiving the command signal. In some instances, this indication acts as a confirmation or failure of the intended input.

Guided relay infusion systems and methods are provided. A guided relay infusion system may be a portion of an infusion pump that can simultaneously deliver a medical fluid from two syringes. When a first one of the syringes is running out of the medical fluid and a second one of the syringes is more full of the medical fluid than the first one of the syringes, guided relay messages are provided for a relay handoff from the first one of the syringes to the second one of the syringes that ensures a smooth continuous delivery of more of the medical fluid than the first one of the syringes holds.

A closed system for harvesting fat through liposuction, concentrating the aspirate so obtained, and then re-injecting the concentrated fat into a patient comprises as its main components a low pressure cannula having between about 7 to 12 side holes of about 1-2 mm by 2.0 to 4.0 mm, a spring loaded syringe holder with a constant force or coiled ribbon spring to apply a substantially constant pressure over the fill excursion of the plunger, and a preferably flexible collection bag which is also preferably graduated, cylindrical over most of its body and funnel shaped at its bottom, all of which are connected through flexible tubings to a multi-port valve. The multi-port valve has two flutter/duck bill valves which restrict the fluid flow to a one way direction which effectively allows the syringe to be used to pump fat out of a patient and into a collection bag in a continuous manner. After the bags are centrifuged to concentrate the fat, the excess fluids are separated and the valve is re-connected to permit the syringe pump to reverse fluid flow to graft the concentrated fat back into the patient.

A rotary sub-assembly for pumping of fluid is provided. The sub-assembly includes a hollow body defining a cavity having a longitudinal axis, the body comprising a cavity wall with at least two ports passing therethrough. At least a portion of the cavity has a non-circular cross-section such that a first constant or varying radial distance from the longitudinal axis to inwardly-offset segments of the cavity wall surrounding the two ports is less than a second constant or varying radial distance from the longitudinal axis to second segments of the cavity wall spaced apart from the two ports. A rotatable plunger is housed in the cavity. The plunger is sized and shaped such that a side wall of the plunger can establish a liquid-tight seal against the inwardly-offset segments of the cavity wall, but does not establish a liquid-tight seal with the second segments of the cavity wall spaced apart from the two ports.

A pump suitable for use in a wearable medical device, such as a patch pump, comprises an axially translatable chamber with an inlet and an outlet, a piston or a diaphragm rotatably received in the chamber, a first valve between the inlet and the chamber, a second valve between the outlet and the chamber, a cam affixed to the chamber, a follower affixed to the piston and in contact with the cam for axially translating the chamber, and a biasing means acting on the chamber for applying a force on the chamber in an axial direction of the chamber to maintain such contact.

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 pump for pumping fluid includes a tube platen, a plunger, a bias member, inlet and outlet valves, an actuator mechanism, a position sensor, and a processor. The plunger is configured for actuation toward and away from the infusion-tube when the tube platen is disposed opposite to the plunger. The tube platen can hold an intravenous infusion tube. The bias member is configured to urge the plunger toward the tube platen.