title: The adsorption of vancomycin by polyacrylonitrile, polyamide, and polysulfone hemofilters.
abstract: The aim of this study was to characterize vancomycin adsorption by polyacrylonitrile (PAN), polyamide, and polysulfone hemofilters using an in vitro model of hemofiltration. Vancomycin (36 mg) was added to a blood-crystalloid mixture of known volume (target concentration of 50 mg/L) and pumped around a closed circuit. Adsorption, which was calculated from the fall in concentration over 120 min, was significantly greater by 0.6-m(2) PAN filters (10.08 +/- 2.26 mg) than by 0.6-m(2) polyamide (5.20 +/- 1.82 mg) or 0.7-m(2) polysulfone (4.80 +/- 2.40 mg) filters (P < 0.05). Cumulative adsorption was not changed by the addition of 500-mL lactated Ringer's solution (to reduce the circulating vancomycin concentration). These data show that although adsorption of vancomycin by PAN, polyamide, and polysulfone hemofilters occurs, the absolute adsorption is small. Adsorption is dependent on filter material and is not reversed by a decrease in circulating concentration.
authors.affiliation: Department of Anaesthesia and Intensive Care, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong.
authors.forename: Qi
authors.initials: Q
authors.lastname: Tian
authors.forename: Charles D
authors.initials: CD
authors.lastname: Gomersall
authors.forename: Patricia P N
authors.initials: PP
authors.lastname: Leung
authors.forename: Gordon Y S
authors.initials: GY
authors.lastname: Choi
authors.forename: Gavin M
authors.initials: GM
authors.lastname: Joynt
authors.forename: Perpetua E
authors.initials: PE
authors.lastname: Tan
authors.forename: April S Y
authors.initials: AS
authors.lastname: Wong
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000327:Adsorption; D000900:Anti-Bacterial Agents / Q000737:chemistry*; D001672:Biocompatible Materials / Q000737:chemistry*; D006440:Hemofiltration / Q000295:instrumentation*; D006863:Hydrogen-Ion Concentration; D009757:Nylons / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D013450:Sulfones / Q000737:chemistry; D014640:Vancomycin / Q000737:chemistry*
chemical_list: D000180:Acrylic Resins; D000900:Anti-Bacterial Agents; D001672:Biocompatible Materials; D009757:Nylons; D011108:Polymers; D013450:Sulfones; C010504:polyacrylonitrile; C017662:polysulfone P 1700; D014640:Vancomycin