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Updated fields - b4, d9, g3, g6, h2, h3, h6 ( type of investigation, investigation findings, investigation conclusion), h11.No decon or visual inspection performed since product was not returned and could not be evaluated.A customer from a cardiac cath lab reported an issue via the emergency support line involving difficulty obtaining an arterial pressure (ap) signal on a cardiosave iabp (intra-aortic balloon pump) using a linear 40cc iab.Initially, the inner lumen of the iab appeared clotted, preventing blood aspiration.The customer was advised on alternate ap sources and confirmed no patient harm or therapy interruption.Later, the iab was replaced, but the ap signal issue persisted despite the new iab having a patent lumen.Troubleshooting attempts were unsuccessful due to environmental distractions.Switching to a different cardiosave unit resolved the issue, and therapy continued without incident.The faulty cardiosave¿s serial number was recorded for service.No patient information was shared, and relevant personnel were notified.The likely root cause is a malfunction in the original cardiosave unit¿s ap acquisition system, not the iab itself.This is supported by: the issue persisted across two separate iabs.The second iab had a confirmed patent lumen.Switching to a different cardiosave resolved the issue immediately.This points to a device-specific failure - possibly in the pressure transducer, internal signal processing, or connector interface of the original cardiosave unit.Reference complaint - (b)(4).
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