Disinfection of Flexible Fiberoptic Laryngoscopes After In Vitro Contamination With Staphylococcus aureus and Candida albicans

OBJECTIVE: To determine the efficacy of various cleaning and disinfective methods in reducing bacterial and fungal load on flexible fiberoptic laryngoscopes (FFLs). DESIGN: In vitro model. SUBJECTS: Flexible fiberoptic laryngoscopes contaminated with Staphylococcus aureus and Candida albicans. INTERVENTIONS: Contamination with S aureus and C albicans was separately induced on FFLs, which were then disinfected with different protocols: 20-, 15-, 10-, and 5-minute soaks in ortho-phthalaldehyde (Cidex OPA; Johnson & Johnson) with or without presoaking in an enzymatic soap solution for 5 minutes; an isolated 5-minute soak in an enzymatic soap solution; a 30-second wipe with antibacterial soap and water; a 30-second wipe with isopropyl alcohol; a 30-second wipe with antibacterial soap, followed by a 30-second scrub with isopropyl alcohol; and a 30-second wipe with germicidal cloth, all accompanied by previous rinsing with 30 seconds of running tap water. RESULTS: All protocols except the isolated 5-minute soak in enzymatic soap solution were successful in completely disinfecting the FFLs after experimental contamination with S aureus or C albicans. CONCLUSION: Various different cleaning methods appeared to properly disinfect FFLs after inoculation with S aureus and C albicans in an in vitro model.