|
Manufacturer's investigation conclusion: a direct correlation between heartmate (hm) 3 left ventricular assist system (lvas), (b)(6) and the reported event could not conclusively be established through this evaluation.The customer communicated that no additional information was available.The patient remains ongoing on heartmate 3 left ventricular assist system (lvas), serial number (b)(6), and no further related events have been reported at this time.The heartmate 3 left ventricular assist system (lvas) instructions for use (ifu), rev.C, provides instructions on all surgical procedures, including preparing the ventricular apex site and inserting the pump in the ventricle.The ifu cautions that after the apical cuff has been sewn to the heart, the metal ring on the apical cuff should extend above the felt surface to allow proper engagement and locking with the slide lock of the heartmate 3 left ventricular assist device (lvad).During the implant process, a complete backup system (implant kit and external components) must be available on-site and in close proximity for use in an emergency.The heartmate 3 mini apical cuff kit instructions for use (ifu), rev.E, is currently available.The section entitled ¿surgical procedures¿ explains how to prepare the mini apical cuff and the apical cuff holder for use.Section ¿directions for use¿ explains how to secure the mini apical cuff to the ventricle.This section also instructs the user that the mini apical cuff should be affixed only by the sew-then-cut method and pledgets should be placed no more than one and a half centimeters from the edge of the felt.Affixing the mini apical cuff using methods other than the prescribed technique can lead to challenges engaging the slide lock mechanism.In addition, this section describes how to insert the pump into the ventricle.This ifu cautions: when sewing the mini apical cuff to the exterior of the heart, the felt surface should have a flat or convex shape.This is so that the pump and slide lock mechanism can engage the metal ring on the mini apical cuff.The suture knots should not interfere with the connection.If a sealing agent is used on or near the mini apical cuff, it should not interfere with the slide lock mechanism.If the slide lock mechanism on the heartmate 3 lvad fails to engage, do not make further attempts to engage until retracting the slide lock mechanism.Evidence of the slide lock mechanism failing to engage will be either visual evidence of the yellow ¿wings,¿ or a tactile feel of three ridges versus one.The slide lock will not engage the mini apical cuff unless initially fully retracted.If difficulty persists when engaging the slide lock mechanism, the lvad should be removed from the mini apical cuff to visualize what might be preventing the connection.The mini apical cuff must be affixed to the left ventricle only by the sew-then-cut method.Using the cut-then-sew method may lead to challenges with engaging the slide lock mechanism.The mini apical cuff must be affixed to the left ventricle only by the prescribed technique in this document to avoid challenges with engaging the slide lock mechanism.The relevant sections of the device history records for (b)(6) were reviewed and showed no deviations from manufacturing or quality assurance specifications.Review of the lvad final assembly device history records showed that the cuff lock installed on (b)(6) passed all inspection and testing steps.No further information was provided.The manufacturer is closing the file on this event.
|