A pressure jacket for use with a fluid injector includes a barrel having a distal end, a proximal end, and a sidewall extending between the distal end and the proximal end along a longitudinal axis. The pressure jacket includes at least one engagement member protruding from a terminal portion of the proximal end of the barrel in a proximal direction along the longitudinal axis. The at least one engagement member tapers axially in a direction from the distal end toward the proximal end of the barrel. The at least one engagement member engages with a locking mechanism on the fluid injector to releasably lock the pressure jacket with the fluid injector. A taper of the at least one engagement member rotationally guides the barrel into self-alignment with the locking mechanism and axially ejects the barrel upon rotation of the barrel about the longitudinal axis.

A chemical-liquid injector includes a piston-driving mechanism (130) that moves a piston member of a syringe containing a contrast medium, which includes an actuator and a ram member which is moved back and forth by the actuator, a control circuit (150) which is electrically connected to the actuator, and an operating knob unit (170) which includes an operating knob that is to be operated by an operator, and a rotation sensor that outputs an electric signal corresponding to a rotation of the operating knob. The control circuit is configured to generate a predetermined control signal accordingly, on the basis of a signal from the rotation sensor, and the piston-driving mechanism is operated according to the control signal.

An automatic fluid injection device comprising: a base body (1) for coming into contact with an injection zone; a support assembly (2) for supporting an actuator mechanism (5, 6, 7) that is controlled by power supply means (11); at least one fluid reservoir (3), each containing an injection piston (35), arranged in said base body (1); a needle assembly (100) comprising an insertion actuator (8), needle movement means (9, 9′), a priming needle (101) for associating with each reservoir (3) and for penetrating into said reservoir (3) before moving its piston (35), and an injection needle (102) for penetrating into the injection zone and for injecting the contents of said reservoir(s) (3) into said injection zone, said device including at least one actuator button (200) for priming, inserting the injection needle into the injection zone, administering fluid, and then retracting the injection needle.

A device for filling and priming syringes is provided and comprises a support base, an engagement seat defined on the support base to receive a rear end of a syringe barrel of a syringe provided with a sliding plunger, engaging means defined at the engagement seat to cooperate with the syringe barrel for firmly holding the syringe to the engagement seat, a first vacuum pump or compressor which is provided with a suction opening communicating with the engagement seat to generate an under-pressure in the volume comprised between the plunger and the engagement seat when the syringe is firmly engaged in the engagement seat, and a second vacuum pump or compressor which is provided with a discharge opening communicating with the engagement seat to generate an over-pressure in the volume comprised between the plunger and the engagement seat when the syringe is thinly engaged in the engagement seat.

Bubble traps for use in medical fluid lines and medical fluid bubble trap systems are disclosed herein. In some embodiments, the bubble trap is configured to trap gas (e.g., air) that flows into the bubble trap from a fluid line. In some embodiments, the bubble trap includes an inlet and an outlet and a chamber between the inlet and the outlet. For example, in some embodiments, the bubble trap is configured to inhibit gas from flowing into the outlet once gas flows into the chamber from the inlet. In some embodiments, the bubble trap is in fluid communication with a source container, a destination container, and/or a patient.

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 system for injecting medium into a patient includes an automated injector including a reservoir, an ejector for ejecting a volume of fluid medium from the reservoir, and an actuator coupled to the ejector. An input device includes a syringe housing, a plunger, a circuit board coupled to a first component of the input device, a plunger position sensor, a battery, and a transmitter for sending an input device action signal to the automated injector. The input device action signal is based at least in part on a signal sent from plunger position sensor. A diversion apparatus is disposed downstream from the reservoir and is configured to receive at least a first portion of the volume of the fluid medium ejected from the reservoir.

An injector head with rotation mechanism allows selection between a state in which a syringe assumes a priming orientation with a through hole of the syringe positioned upper than the injector head body, and a state in which the syringe assumes a contrast agent injectable orientation with the through hole of the syringe positioned lower than the injector head body.

A dispensing assembly has a dispensing chamber housing, a temperature control device, a thermal sensor, and an interface. The dispensing chamber housing has an inner surface, an outer surface, and a wall thickness. The inner surface partially defines a dispensing chamber for receiving a quantity of a substance. The temperature control device at least partially surrounds the dispensing chamber housing. The temperature control device alters a temperature of a substance in the dispensing chamber. The temperature control device and the thermal sensor are located on a substrate. The substrate is wrapped around an exterior surface of the dispensing chamber housing. The interface is connected to the temperature control device and the thermal sensor. An interface connector is connected to the interface. The distance between the temperature control device and the thermal sensor is approximately equal to the wall thickness of the dispensing chamber housing.

A fluid injector system for delivering a multi-phase fluid injection to a patient and methods of fluid delivery is disclosed. Methods of creating and using a multi-aspect fluid path impedance model of the injector system are used. Modeling and adjustment of factors that affect impedance and prevent or reduce backflow, reduce the likelihood of fluid flow rate spikes and provide more accurate flow rates and mixing ratios of fluids may be repeated or happen essentially continuously during an injection. The adjustments may be determined before the injection or determined and/or adjusted during the injection. The determination may include sensor feedback commonly used in injectors such as pressure and position feedback as well as other sensors. In all cases, the user can be notified of adjustments through on-screen notices and/or through the recordation of the injection data by a control device of the injector at the conclusion of the injection.