Describe event or problem: the hospital reported that fluids were sucked through the vacuum lines contaminating the vacuum lines.After verifying correct hookup, the used canister showed fluid in the vacuum port.The returned sample was evaluated via visual, functional, and dimensional inspections.The only was the reported issue could be duplicated was to initially suction fluid with an incorrect hookup and then use the correct hookup.The root cause could not be determined since the report indicates that correct hookup was verified by the user, and incorrect hookup was the only way deroyal could duplicate the issue.
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