title: Loss of quinidine gluconate injection in a polyvinyl chloride infusion system.
abstract: The effect of a polyvinyl chloride (PVC) i.v. administration system on the availability of quinidine gluconate was studied. Quinidine gluconate diluted in 5% dextrose injection was administered intravenously to five healthy volunteers via conventional PVC infusion sets, and the subjects received oral quinidine sulfate two days later. The mean +/- S.D. oral bioavailability of quinidine was, unexpectedly, greater than 100% (147 +/- 44%). To test the possibility that this occurred because of reduced delivery of i.v. quinidine, the percentage of drug delivered via two systems was evaluated in simulation studies, one involving a conventional PVC administration set and the other a glass syringe attached to shorter PVC tubing and a winged i.v. catheter. Spectrophotometric analysis revealed a 5-7% reduction in absorbance associated with loss of quinidine in the PVC infusion bag and a further 34-38% reduction in absorbance attributable to quinidine loss in the PVC tubing. However, with the winged i.v. catheter system the loss was reduced to less than 3%. More than 40% of a dose of quinidine gluconate was lost when the drug was administered with a conventional PVC i.v. administration set. Drug loss was reduced by using a winged i.v. catheter and shorter tubing.
authors.affiliation: Department of Medicine, School of Medicine, Vanderbilt University, Nashville, TN 37232-6602, USA.
authors.forename: D
authors.initials: D
authors.lastname: Darbar
authors.forename: S
authors.initials: S
authors.lastname: Dell'Orto
authors.forename: G R
authors.initials: GR
authors.lastname: Wilkinson
authors.forename: D M
authors.initials: DM
authors.lastname: Roden
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000962:Antimalarials / Q000008:administration & dosage* / Q000737:chemistry / Q000493:pharmacokinetics*; D001682:Biological Availability; D004349:Drug Packaging; D005898:Glass; D006801:Humans; D007262:Infusions, Intravenous; D008297:Male; D011143:Polyvinyl Chloride; D011802:Quinidine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000737:chemistry / Q000493:pharmacokinetics
chemical_list: D000962:Antimalarials; D011143:Polyvinyl Chloride; D011802:Quinidine; C016713:quinidine gluconate