A sample was received to perform an investigation.The returned device was examined and a functional failure of the tracheostomy tube was noted.A leak defect was not able to be replicated; however, an inflation defect was identified.Neither air nor sterile water could pass through the airway.There was resistance from the pilot balloon and rather than the air or water traveling to the cuff it remained in the balloon.A device history record (dhr) review was performed and found no instances of non-conformities, scrap, or rework that could be related to the customer's issue.The root cause of the failure identified was unable to be determined.This remediation mdr was generated under protocol b10009406, as a result of warning letter cms# 617147.
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