The dosing apparatus comprises a conveying device (5), which is driven by at least one conveying drive (4), for conveying fluid from the interior (3) of a container (2). The fluid by means of the conveying device (5) is conveyable from the container to a dispensing opening (6). The conveying device (5) comprises a cylinder (7) having at least one intake opening (11) and at least one outlet opening (12) on an inner cylinder wall (8), and a first piston (9) and a second piston (10). The first piston (9) and the second piston (10) are mounted within the cylinder (7) so as to be displaceable in the longitudinal direction. Furthermore, the first piston (9) and the second piston (10) between the end sides thereof and together with a portion of the inner cylinder wall (8) delimit a variable fluid volume (17).

A method of delivering a multi-phase fluid injection to a patient via a fluid injector comprising two or more syringes includes injecting a first fluid of the fluid injection from at least a first syringe at a first predetermined flow rate, wherein the first fluid has a first viscosity; injecting an initial portion of a second fluid from at least a second syringe at an intermediate flow rate different than a second predetermined flow rate for a specified time, the second fluid having a second viscosity different from the first viscosity; and injecting a remaining portion of the second fluid of the fluid injection at a flow rate at the second predetermined flow rate. A fluid injector system configured for delivering a multi-phase fluid injection is disclosed.

A first tube connector and a second tube connector are to be automatically and mechanically attached to and detached from each other. Provided is an attaching/detaching device (100) including: a fixing portion (104) configured to fix a first tube connector (105); a holding portion (107) configured to hold a second tube connector (106); a moving portion configured to move the holding portion (107), which holds the second tube connector (106), in a direction of approaching the first tube connector (105) to connect the second tube connector (106) to the first tube connector (105), and move the second tube connector (106) after the connection in a direction of separating from the first tube connector (105) to release the connection of the second tube connector (106) and the first tube connector (105).

A pump includes a cylinder, a piston and a controller. The cylinder has first and second ends and includes first and second inlet-outlet ports, each of the first and second inlet-outlet ports is configured to alternately intake a fluid to the cylinder and output the fluid from the cylinder. The piston is configured to be moved within the cylinder between the first and second ends by alternately reversing a direction of movement of the piston, so as to pump the fluid through the first and second inlet-outlet ports. The controller is configured to control the movement of the piston within the cylinder, including: (a) choosing between first and second operational modes, (b) in the first operational mode, controlling the piston to oscillate over a predefined interval that does not exceed a predefined distance from the first end or from the second end, and (c) in the second operational mode, controlling the piston to move at a selected speed between the first end and the second end.

A dual-action pump includes a cylinder, a piston and a controller. The cylinder includes first and second inlet-outlet ports, each of the first and second inlet-outlet ports is configured to alternately intake a fluid to the cylinder and output the fluid from the cylinder. The piston is configured to be moved within the cylinder in a periodic cycle that alternately reverses a direction of movement of the piston, so as to pump the fluid through the first and second inlet-outlet ports. The controller is configured to control the movement of the piston within the cylinder, including setting to the piston: (a) a first speed, during a first predefined interval that precedes reversing the direction of movement, (b) a second speed, larger than the first speed, during a second predefined interval that follows reversing the direction, and (c) a baseline speed, smaller than the first speed, outside the first and second intervals.

A pump device includes a rotary motor, a compartment for insertion of a disposable pump part, and one or more pulsation-reduction elements. The disposable pump part includes an input port, an output port, and a dual-action reciprocating assembly. The input port is configured for intaking fluid. The output port is configured for outputting the fluid. The dual-action reciprocating assembly is configured for pumping the fluid. The assembly includes a single piston and a rod configured to be coupled to the rotary motor, so as to drive the piston. The one or more pulsation-reduction elements are configured to reduce a pulsation in the outputted fluid, caused by the single-piston dual-action reciprocating assembly.

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 cap for intake and delivery of a fluid from a syringe is described. The cap includes an outer cap assembly comprising a fluid inlet path and a fluid outlet path and an inner cap assembly configured for innertion into a fluid nozzle of the syringe and to provide selective fluid communication between an interior of a syringe and the fluid inlet path or the fluid outlet path. The outer cap assembly is slidable relative to the inner cap assembly between a first filling position, where the interior of the syringe is in fluid communication with the fluid inlet path, and a second delivery position, where the interior of the syringe is in fluid communication with the fluid outlet path. The outer cap may further slide, relative to the inner cap assembly, to a third closed position where the interior of the syringe is fluidly isolated from the fluid inlet path and the fluid outlet path. Syringes including the cap are also described.

The dosing apparatus comprises a conveying device (5), which is driven by at least one conveying drive (4), for conveying fluid from the interior (3) of a container (2). The fluid by means of the conveying device (5) is conveyable from the container to a dispensing opening (6). The conveying device (5) comprises a cylinder (7) having at least one intake opening (11) and at least one outlet opening (12) on an inner cylinder wall (8), and a first piston (9) and a second piston (10). The first piston (9) and the second piston (10) are mounted within the cylinder (7) so as to be displaceable in the longitudinal direction. Furthermore, the first piston (9) and the second piston (10) between the end sides thereof and together with a portion of the inner cylinder wall (8) delimit a variable fluid volume (17).

A method of priming a medical pump is disclosed. The method includes providing a medical pump comprising a chamber, a first plunger element and, a second plunger element. The method further comprises determining a minimum distance (MD) between the first and the second plunger element and determining the location of an opening of the chamber.