A steris service technician arrived at the user facility following the reported event to inspect the lighting system.The technician identified that the plastic cover was brittle and cracking in the area where the plastic cover halves are secured over the spring arm with screws.The technician's evaluation identified that it was from this brittle, compromised area of the plastic covering that a small piece detached and fell into the sterile field.The technician replaced the light head cover, tested the surgical light and confirmed the unit was operating according to specification.Steris's investigation determined that the most likely cause of the lighting cover damage was the use of off-label cleaning agents and cleaning practices performed by the user facility.Specifically, excess cleaning solution infiltrating the light's screw housing and degrading the mount.The harmony led 585 operator manual (6-1) states, "do not spray any cleaning product directly onto the lighthead, modem chassis, or any system components.Dampen a soft cloth with the cleaning solution and wring out the excess moisture," and (1-3) states, "caution: possible equipment damage use of any disinfectant solution other than those listed below may cause discoloration or deformation on the lens surface: germicidal surface wipes disinfecting/deodorizing/cleaning wipes.Cleaning solutions other than those listed have not been tested for compatibility or effectiveness.Always follow manufacturer instructions for concentrations and use of cleaning products.Use only recommended cleaning/disinfecting and/or anti-static agents on this light.Some degree of staining, pitting, and/or discoloration could occur if a phenolic-, iodophor-, or glutaraldehyde-based disinfectant is used on the surfaces of this light.Also, use of alcohol or aerosol spray cleaner/disinfectants containing a substantial amount of alcohol in the formula can damage the polycarbonate lens.".
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