Covidien/medtronic reference number (b)(4).No customer sample was available for analysis.A review of the complaint database found there are no additional complaints with the same lot number and the same failure mode.A review of the lot history record for the reported device found it met all quality requirements and specifications prior to it's release.The reported issue could not be confirmed and the cause cannot be determined, however, manufacturing controls are in place to detect the reported complaint during the manufacturing process.Complaint trends will continue to be monitored.Ifu warnings include: all inner cannulae with twist-lock connectors provided in this package should not be used on any other tubes because they are fitted to the exact length of this tube.During and afer attachment of respiratory or anesthesia tubing and/or connectors to the inner cannula, avoid application of excessive rotational, linear, or rocking forces on the tubing and/or connectors to prevent accidental disconnection of the inner cannula, or damage to the tracheostomy tube.
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