H3, h6: the device, used in treatment, has not been returned for evaluation.No additional information was provided, we cannot establish a relationship between the device and the reported event or determine a root cause on this occasion.The device is equipped with high and low vacuum alarms to alert users to these events occurring during therapy, these alarms are designed to activate based on changes in pressure status detected by device, however, there are scenarios that may occur during therapy that can impact alarm functionality; ensure there are no kinks in canister tubing.Please refer to the instructions for use which offers further assistance.A review of the associated batch manufacturing records confirmed that the device met manufacturing specifications at the point of release.The complaint history review found further instances of the reported event in the past years.This investigation is now complete with no further action deemed necessary.Smith + nephew will continue to monitor for any adverse trends relating to this product range.
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