An apparatus for preventing backflow includes a body forming an accommodating portion which forms a transport passage of a fluid inward, wherein the accommodating portion comprises a double backflow prevention chamber to prevent backflow of the fluid, and a double backflow prevention member provided in the accommodating portion and stepwise implementing opening and closing of the double backflow prevention chamber, In particular, the accommodating portion includes an inflow chamber provided at an upper portion of the body and into which the fluid flows; a discharge chamber through which the fluid is discharged to a lower portion of the inflow chamber; and the double backflow prevention chambers respectively provided at the lower portion of the inflow chamber and the upper portion of the discharge chamber.

Syringe control assemblies are described herein. A syringe control assembly includes an assembly body, a first syringe, a second syringe, and a pump assembly. The first and second syringes are releasably coupled to a syringe mounting rack of the assembly body. The pump assembly includes a first pump unit and a second pump unit. Each pump unit is in fluid communication with each respective syringe. In a priming configuration, the first pump unit is configured to draw fluid flow from the first syringe cavity and the second pump unit is configured to pump fluid flow into the second syringe cavity.

An ambulatory infusing device including a housing, a reservoir defining an interior volume, a wall associated with the housing and having an inner surface that faces into the reservoir interior volume, and a filter assembly. The filter assembly may include a filter assembly housing with a housing filter portion having a free end associated with the inner surface of the wall and a filter supporting volume that extends to the free end of the housing filter portion, and a filter located within the filter supporting volume that extends to at least the free end of the housing filter portion.

An ambulatory infusing device including a housing, a reservoir defining an interior volume, a wall associated with the housing and having an inner surface that faces into the reservoir interior volume, and a filter assembly. The filter assembly may include a filter assembly housing with a housing filter portion having a filter supporting volume, a filter located within the filter supporting volume, and a bubble guard, including a bubble guard wall and at least one bubble guard aperture that extends through the bubble guard wall, associated with the filter assembly housing such that the bubble guard wall is located in spaced relation to the filter.

A retrograde disposable intravenous (IV) set is disclosed. The IV set includes a diverter housing between upper and lower portions of a fluid line, the diverter housing including a lower end and an upper end extending away from the lower end and the fluid line to a syringe port located in the upper end, and a diverter member within the diverter housing and configured to move within the diverter housing from a first position, at which a first opening through the diverter member forms a first fluid pathway between the upper portion and the lower portion of the fluid line, to a second position, at which the first fluid pathway is blocked and a second fluid pathway is formed between the upper portion of the fluid line and a syringe port. Retrograde infusion may occur when the diverter member is in the second position.

An implantable system for delivering fluids, such as drugs, to one or more anatomical structures in a patient's (i.e., human or animal) body. A number of medical conditions require continual and/or periodic administration of fluids (e.g., drugs) to target regions (e.g., anatomic organs) of the body. Accessibility to those target regions might be limited technically for ex. and not limited to: frequent endoscopic, radiologically guided or surgical approaches. The system delivers the fluid needed in a continual or intermittent fashion to the target region. It controls the amount of fluid delivered to the target region and measures the intended physiologic effect of the fluid delivered.

An ambulatory infusing device including a housing, a reservoir defining an interior volume, a wall associated with the housing and having an inner surface that faces into the reservoir interior volume, and a filter assembly. The filter assembly may include a filter assembly housing with a housing filter portion having a free end associated with the inner surface of the wall and a filter supporting volume that extends to the free end of the housing filter portion, and a filter located within the filter supporting volume that extends to at least the free end of the housing filter portion.

An ambulatory infusing device including a housing, a reservoir defining an interior volume, a wall associated with the housing and having an inner surface that faces into the reservoir interior volume, and a filter assembly. The filter assembly may include a filter assembly housing with a housing filter portion having a filter supporting volume, a filter located within the filter supporting volume, and a bubble guard, including a bubble guard wall and at least one bubble guard aperture that extends through the bubble guard wall, associated with the filter assembly housing such that the bubble guard wall is located in spaced relation to the filter.

Systems and methods are provided for intermittent microinfusion. A system may include a pump and an IV set that includes a y-port valve disposed below a pump interface portion of the IV tubing. The y-port valve may include an internal valve member that allows fluid to flow from the pump to a patient when no syringe is attached to the y-port. The internal valve member may be moved by the attachment of a syringe containing the medication to be infused to the y-port such that the fluid pathway from the pump to the patient is blocked and fluid from the syringe can be injected into the IV tubing between the y-port valve and the pump. The pump may retrograde pump the medication into the tubing via the y-port valve and then forward pump the medication to the patient when the syringe is removed from the y-port.

A retrograde disposable intravenous (IV) set is disclosed. The IV set includes a diverter housing between upper and lower portions of a fluid line, the diverter housing including a lower end and an upper end extending away from the lower end and the fluid line to a syringe port located in the upper end, and a diverter member within the diverter housing and configured to move within the diverter housing from a first position, at which a first opening through the diverter member forms a first fluid pathway between the upper portion and the lower portion of the fluid line, to a second position, at which the first fluid pathway is blocked and a second fluid pathway is formed between the upper portion of the fluid line and a syringe port. Retrograde infusion may occur when the diverter member is in the second position.