초록 ▼

An infusion device is disclosed having an improved valving apparatus with the valving apparatus being configured to substantially preclude formation of volumetric dead spaces. The valving apparatus is typically utilized to allow introduction of one or more secondary fluids, such as drugs, into a pat

An infusion device is disclosed having an improved valving apparatus with the valving apparatus being configured to substantially preclude formation of volumetric dead spaces. The valving apparatus is typically utilized to allow introduction of one or more secondary fluids, such as drugs, into a patient during normal infusion of the primary fluid into the patient, with such insertion being effected through a secondary conduit connected to the primary infusion conduit through the valving apparatus. The valving apparatus includes a movable element that is positioned adjacent to the inner wall of the primary conduit so that the movable element forms a one-way valve thereat. The movable element is partially displaced due to flow of secondary fluid through the secondary conduit toward the primary conduit to thereby allow the secondary fluid to pass by the movable element and enter the primary conduit, but the movable element cannot be displaced by flow within the primary conduit and therefore prevents passage of fluids through the valving apparatus from the primary conduit to the secondary conduit. When not displaced due to flow of secondary fluid through the valving apparatus into the primary conduit, the movable element is positioned near the inner wall of the primary conduit to substantially preclude formation of volumetric dead spaces thereat.

대표청구항 ▼

An infusion apparatus, comprising: a primary conduit for conveying a primary fluid through a primary passage formed by the inner wall of said primary conduit; engaging means adjacent to and outside said primary passage; a secondary conduit adapted to receive a secondary fluid to be mixed with said p

An infusion apparatus, comprising: a primary conduit for conveying a primary fluid through a primary passage formed by the inner wall of said primary conduit; engaging means adjacent to and outside said primary passage; a secondary conduit adapted to receive a secondary fluid to be mixed with said primary fluid passing through said primary passage; connecting means for connecting said secondary conduit to said primary conduit so that said secondary conduit communicates with said primary passage; and valving means having spaced portions engaging said engaging means and a displaceable portion having opposite edges and extending between said spaced portions so that said displaceable portion is displaced upon actuation of said valving means due to fluid flow from said secondary conduit toward said primary conduit, with said spaced portions remaining in contact with said engaging means during said actuation of said valving means, whereby said displaceable portion of said valving means provides openings to said primary conduit from said secondary conduit at both of said opposite edges, said valving means blocking flow of fluid between said primary passage and said secondary conduit except during actuation of said valving means due to flow of secondary fluid through said secondary conduit toward said primary passage to thereby allow said secondary fluid to enter said primary passage, and said displaceable portion of said valving means, when not displaced due to actuation of said valving means, having a surface substantially adjacent to the inner wall of said primary conduit to thereby substantially preclude formation of a volumetric dead space thereat.