Abstract: An additive delivery system may incorporate a cartridge system, including a container cap and a reservoir assembly that provides for storage of an additive. The container cap includes a mixing nozzle for mixing of the additive with a base fluid as the base fluid flows from the base fluid container through the cartridge. A one-way valve prevents backflow of base fluid and/or mixed base fluid/additive from an area downstream of the mixing nozzle such that the base fluid supply remains in a pure state.

Abstract: A device for clearing obstructions from a medical tube includes an enclosure having an interior and an exterior, the enclosure comprising a distal opening for providing access to the interior of the enclosure. The device further includes a spool provided within the enclosure that is rotatable about an axis and an elongated guide member coupled to the spool such that rotation of the spool causes the guide member to wind or unwind about the spool. The device further includes a drive mechanism that is operable to rotate the spool within the enclosure without compromising a sterile field within the enclosure.

Abstract: The present invention provides a photobioreactor for a phototrophic microorganism, and culture medium therefor, comprising a capsule, the capsule comprising an elongated body comprised of a first, flexible polymer film that is at least partially transparent to light of a wavelength that is photosynthetically active in a phototrophic microorganism and divided width wise into a plurality of adjacent channels, each channel having a major cross-sectional dimension that is not more than about one-third of the length of the elongated body, when the elongated body is inflated; and a fluid distribution structure coupled to the elongated body adapted for fluid communication with the plurality of adjacent channels that distributes a flow of culture medium amongst the plurality of channels, wherein the fluid distribution structure is comprised of a second, flexible polymer film.