A fluid delivery system and a fluid conduit assembly suitable for use with the system are disclosed herein. The system includes a fluid infusion pump and a fluid conduit assembly coupled to the pump to deliver medication fluid to a user. The fluid conduit assembly includes a structure defining a flow path for the medication fluid, and a gas trapping filter coupled to the structure and positioned in the flow path. The gas trapping filter functions to filter particulates from the medication fluid and retain gas bubbles from the medication fluid.

A fluid delivery system and a fluid conduit assembly suitable for use with the system are disclosed herein. The system includes a fluid infusion pump and a fluid conduit assembly coupled to the pump to deliver medication fluid to a user. The fluid conduit assembly includes a structure defining a flow path for the medication fluid, and a gas trapping filter coupled to the structure and positioned in the flow path. The gas trapping filter functions to filter particulates from the medication fluid and retain gas bubbles from the medication fluid.

A gas trap apparatus (100) is for medical fluids, such as in infusion systems. The apparatus has a chamber (101), an inlet (103) to the bubble entrapment chamber with multiple of inlet ports (104, 105), and an outlet with at least one outlet port (110). The ports and the chamber are arranged to allow mixing of gases from the different fluids and which are trapped in the chamber. The inlet ports merge at a confluence space and the chamber comprises a diffuser with apertures (107) around an inflow tube for inflow of fluids into the chamber with a lateral dimensional component. Where the inlet ports (104, 105) have a diameter in the range of 1.5 mm to 8.0 mm, and the distance between an upper end of a confluence space between the ports (104, 105) and the diffuser apertures (107) is no more than 20 mm. This promotes turbulence as the fluids mix, and this turbulence continues through the diffuser, thereby enhancing bubble formation and hence migration of the gas as bubbles away from the outlet, towards an upper end of the chamber in use.

A gas trap apparatus (100) is for medical fluids, such as in infusion systems. The apparatus has a chamber (101), an inlet (103) to the bubble entrapment chamber with multiple of inlet ports (104, 105), and an outlet with at least one outlet port (110). The ports and the chamber are arranged to allow mixing of gases from the different fluids and which are trapped in the chamber. The inlet ports merge at a confluence space and the chamber comprises a diffuser with apertures (107) around an inflow tube for inflow of fluids into the chamber with a lateral dimensional component. Where the inlet ports (104, 105) have a diameter in the range of 1.5 mm to 8.0 mm, and the distance between an upper end of a confluence space between the ports (104, 105) and the diffuser apertures (107) is no more than 20 mm. This promotes turbulence as the fluids mix, and this turbulence continues through the diffuser, thereby enhancing bubble formation and hence migration of the gas as bubbles away from the outlet, towards an upper end of the chamber in use.

A method for manufacturing a pre-filled medicinal liquid injection apparatus according to a disclosed embodiment includes: a plunger disposing step in which a lubricant is applied to an inner surface of the chamber that defines an internal space connected to an injection port and the plunger is disposed inside the chamber such that the internal space has a predetermined volume; and a medicinal liquid pre-filling step in which the internal space of the chamber is filled with a medicinal liquid after the plunger disposing step.

A method for manufacturing a pre-filled medicinal liquid injection apparatus according to a disclosed embodiment includes: a plunger disposing step in which a lubricant is applied to an inner surface of the chamber that defines an internal space connected to an injection port and the plunger is disposed inside the chamber such that the internal space has a predetermined volume; and a medicinal liquid pre-filling step in which the internal space of the chamber is filled with a medicinal liquid after the plunger disposing step.

A fluid delivery system and a fluid conduit assembly suitable for use with the system are disclosed herein. The system includes a fluid infusion pump and a fluid conduit assembly coupled to the pump to deliver medication fluid to a user. The fluid conduit assembly includes a structure defining a flow path for the medication fluid, and a gas trapping filter coupled to the structure and positioned in the flow path. The gas trapping filter functions to filter particulates from the medication fluid and retain gas bubbles from the medication fluid.

A fluid delivery system and a fluid conduit assembly suitable for use with the system are disclosed herein. The system includes a fluid infusion pump and a fluid conduit assembly coupled to the pump to deliver medication fluid to a user. The fluid conduit assembly includes a structure defining a flow path for the medication fluid, and a gas trapping filter coupled to the structure and positioned in the flow path. The gas trapping filter functions to filter particulates from the medication fluid and retain gas bubbles from the medication fluid.

A medicinal liquid pumping apparatus according to an embodiment disclosed herein includes: a chamber having an internal space, which is not filled with a medicinal liquid, and an injection port connected to the internal space; a plunger disposed inside the chamber such that the internal space has a predetermined volume; and a pressing actuator configured to be capable of pressing the plunger such that the volume of the internal space is reduced.

A medicinal liquid pumping apparatus according to an embodiment disclosed herein includes: a chamber having an internal space, which is not filled with a medicinal liquid, and an injection port connected to the internal space; a plunger disposed inside the chamber such that the internal space has a predetermined volume; and a pressing actuator configured to be capable of pressing the plunger such that the volume of the internal space is reduced.