New research suggests reprocessing scopes used in gastrointestinal procedures may not completely disinfect the devices.
In analyzing 20 fully reprocessed gastroscopes and colonoscopes, authors of a study published in the American Journal of Infection Control found that eight scopes contained fluid resembling simethicone solution, which is used to reduce foam and bubbles that obscure the view during endoscopies. In two of the fully reprocessed scopes, researchers were able to detect the presence of simethicone.
"The impact of residual simethicone is unknown, but it is a hydrophobic substance that may interfere with reprocessing and foster microbial growth," the study authors wrote.
In recent years, scopes used for gastrointestinal procedures have been linked to deadly outbreaks of superbug infections, as they have proved very difficult to clean and can harbor bacteria even when fully reprocessed according to manufacturer guidelines. In light of their findings, the authors recommend that clinicians use simethicone very sparingly or not at all until further investigation proves it is safe.