Described is a priming device to prime a gas from a fluid delivery system by receiving the gas and a fluid used to push the gas into a chamber, the priming device including a housing having a chamber, an inlet port, and an opening to release gas received into the chamber. The device further includes a sleeve having an open first end for coupling with a male luer connector, a second end coupled to the housing, and an axis between the first and second ends. The sleeve defines at least one window. The device further includes an arm extending from a bottom of each window toward the first end, and a member extending radially from an inner surface of each arm. Each member has a ramp surface, an engagement surface extending transversely to the ramp surface, and an apex area that transitions between the ramp surface and the engagement surface.

A device for coupling to a fluid connector of an IV administration set to resist contamination of the fluid connector and IV administration set and permit priming of the IV administration set. The device including a cover body having a cavity for receiving the fluid connector, a priming passage for priming fluid from the IV administration set through the fluid connector, and a coupling tab extending from the cover body, the coupling tab permitting the cover body to be coupled to a length of an IV line or other portion of the IV administration set to resist contamination and permit priming of the IV administration set.

A gas elimination apparatus and a method for use in an intravenous delivery system are provided. The apparatus includes a fluid inlet coupling a fluid flow into a liquid chamber, a fluid outlet protruding into the liquid chamber, and a flow diversion member proximal to the fluid outlet. The flow diversion member configured to block a direct flow between the fluid inlet and the fluid outlet. The apparatus includes a membrane separating a portion of the liquid chamber from an outer chamber and a gas venting valve fluidically coupling the outer chamber with the atmosphere. The flow diversion member may be mechanically supported by at least one strut or elongate member extending along a flow direction into the liquid chamber.

Provided is an extended use self-contained, wearable medical device. The device is preferably configured with an infusion deployment mechanism for variably inserting and retracting an infusion needle to different depths, or completely retracting the infusion needle from the infusion site and then re-inserting the infusion needle after a predetermined period of time, throughout an infusion cycle for extending the viability of the infusion site. Another embodiment comprises dual needle deployment mechanisms which may also variably insert and retract the infusion needles. A flow sensor is preferably provided for detecting the stoppage of flow through the infusion cannula and signaling the needle deployment mechanism to attempt infusion at a different depth or to deploy a second infusion needle. A re-fillable reservoir assembly is preferably provided for supplying a drug over the extended use of the device. Another embodiment comprises a partially reusable and partially disposable medical device implementing the above features.

A liquid delivery system includes an air elimination assembly disposed in a pathway between a liquid source and a recipient. As its name suggests, the air elimination assembly removes gas from the liquid as it flows between an input port and output port of the air elimination assembly. A magnitude of pressure at the gas output port of the air elimination assembly is controlled to expel gas from the liquid passing from the input port to the output port. The gas expelled from the liquid is outputted from the gas output port. The liquid delivered to the recipient is void of any gases.

Described is a priming device to prime a gas from a fluid delivery system by receiving the gas and a fluid used to push the gas into a chamber, the priming device including a housing having a chamber, an inlet port, and an opening to release gas received into the chamber. The device further includes a valve extending from the inlet port toward the chamber and a cover body comprising one or more flexible protrusions extending axially inward from an inner surface of the cover body. The cover body has an open first end, an open second end, and an axis between the first end and the second end, the first end configured to couple with a male luer connector, the second end configured to couple with the inlet port of the housing, wherein the cover body is moveable relative to the housing.

An inline microgravity air trap device includes an elongate air trap chamber, the air trap chamber having a blind end, an opposite air outlet end containing a gas egress opening, a fluid inlet port connecting to a pressurized fluid supply, a fluid outlet port connecting the air trap chamber to a fluid delivery destination, a filter forming a tube having an interior, a first end at the blind end of the air trap chamber and a second end at the gas egress opening, and a structural insert in the interior of the tube, having a first insert end located at the blind end, and a second insert end located the air outlet end, where the chamber is formed to direct fluid from the pressurized fluid supply to accelerate centrifugally around the filter, forcing gas contained in the fluid to pass through the filter into the interior of the tube.

Air elimination assemblies are described herein. An air elimination assembly for eliminating air from a flow of infusate includes a housing and a hydrophobic filter. The housing defines an infusate flow path having an inlet and an outlet, and an air flow path in fluid communication with the infusate flow path and disposed between the inlet and the outlet of the infusate flow path. The hydrophobic filter is disposed in fluid communication with the air flow path, wherein the hydrophobic filter is configured to permit air from the flow of infusate through a hydrophobic filter media and prevent the flow of infusate through the hydrophobic filter media.

Apparatuses for priming a drip chamber of an infusion tube seta are described. A priming apparatus may be incorporated into a cavity of a body, such as a drip chamber cap, that is attached to or integrally formed with the inlet side of drip chamber. The priming apparatus includes a closure mechanism at least a portion of which is accommodated in a cavity in the body. The cavity is part of an outflow or vent passage through the body (e.g., the drip chamber cap) and the closure mechanism is operable, e.g., responsive to user force, to selectively open the outflow passage, thereby unsealing the vent cavity to ambient air and allowing air to be purged from the fluid system during priming of the drip chamber. When the closure mechanism is an closed position, the outflow passage and vent cavity as sealed from ambient air, preventing any air from passing into the fluid system through the cap.

An intravenous delivery system may operate by gravity feed, and may have a liquid source containing a liquid, a drip unit that receives the liquid from the liquid source, and tubing that receives the liquid from the drip unit for delivery to a patient. A flow rate sensor may be used to measure a flow rate of liquid through the intravenous delivery system, and may generate a flow rate signal indicative of the flow rate. A controller may receive the signal, and may compare the flow rate with a desired flow rate. If the flow rate is more or less than the desired flow rate, the controller may transmit a control signal to a flow rate regulator. The flow rate regulator may receive the control signal and, in response, modify the flow rate to bring the flow rate closer to the desired flow rate.