Screens for medical filters
Screens for medical filters are manufactured using photoetching technology. The process reportedly produces cleaner, more-efficient, burr-free screens than other techniques. The screens are offered in stainless steel; however, screens made from polyimide and other materials are also ava ilable. Photoetching technology enables designers to create a tapered hole, which can facilitate liquid filtration and back-flow cleaning. Hole sizes can be as small as 0.003 in. Photoetched screens are also engineered not to change over time, which can happen with woven wire mesh screens.
Tech-Etch Inc., Plymouth, MA
An in-line filter unit incorporates replaceable filters that are available in such materials as nylon, polypropylene, or acetal. The filter unit can be equipped to accommodate barb fittings as small as 1⁄16 in. ID. Standard versions of the unit come with a barb for 5⁄32 in. ID tubing. Optional male and female luers are available with housings made of nylon or polypropylene. The device is cleanable, features an O-ring seal, and is designed to ensure a positive seal from vacuum to 30 psi. Replaceable filters are made of high-density polyethylene. Standard 20- and 60-µm filter sizes are offered.
Pneuline Manufacturing and Supply, Greeley, CO
Injection-molded filters for IV devices are designed for use with adults, children, and babies. The filters feature a two-layer design and compact shape. The manufacturer’s Hi-Flo PES membrane provides controlled drug flow rates and protection against contamination. Clear housings are available, as are green, blue, and amber housings for photosensitive drugs.
GVS Filter Technology Inc., Indianapolis, IN
A company has added three hydrophilic in-line IV filters to its product line. Filter models 12113, 12114, and 12115 feature a hydrophilic primary membrane composed of polyethersulfone and a 0.1-µm-thick hydrophobic vent membrane made of polyvinylidenefluoride They can all be pump or gravity fed. Part 12113 features a clear core and a cylindrical-shaped housing constructed from polyethylene terephthalate. Part 12114 has an acrylic, coin-shaped housing, and features low priming, and a hold-up volume of less than 0.4 ml. Part 12115 has a copolyester cylindrical-shaped housing with a yellow core and is compatible with total nutrient admixture emulsions.
Qosina, Edgewood, NY