As reported, the cath lab has noted multiple instances of air bubbles forming in the transducer/manifold at the location where it connects to the angiographic syringe.The manifold is provided in an angiodynamics convenience kit, however the syringe is provided by merit medical.There has been only one instance of air bubbles noted in a patient's lad, however no complications occurred from that event and no medical intervention was required.Only one of the two physicians who utilize these components has had issues with air bubbles.
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A review of the device history records was performed for the indicated packaging and component lots for any deviations related to the reported defect of the complaint.The review confirms that the lots met all material, assembly and performance specifications.The recent angiodynamics complaint report was reviewed for the perceptor dts and manifolds product family and the failure mode "air bubbles noted." no adverse trends were identified.One used manifold and one used merit syringe (not supplied by angiodynamics) were returned for evaluation.The manifold female luer lock end port contained slight rotational gouge marks inside the threaded area, and slight damage was noted to the female threads.The damage noted is consistent with previously viewed sample of over-tightened connections.No other damage was noted to the returned manifold.No visual damage was noted to the merit syringe.Leak testing was performed on the manifold, per angiodynamics' procedures and the device passed testing.A simulated use inspection was performed to recreate the complaint description: the merit syringe was connected to the proximal female port of the four valve manifold.The spike of a fluid delivery set (fds) was attached to a saline bag and distal end was attached to the manifold side port.The entire system (manifold, merit syringe and fds) were primed and de-bubbled using the merit syringe.Fluid was drawn into the primed system by aspirating the syringe piston by hand.No air bubbles were observed during 5/5 aspirations.The manifold female end ports and side ports threads, as well as the female tapers were measured and found to be within specification.The returned manifold sample was confirmed for slight damage to the female threads and rotational gouge marks inside the threaded area.The damage noted is consistent with previously viewed sample of over-tightened connections.However, the returned sample was evaluated and found to be visually and functionally acceptable, i.E.Met specification.The root cause for the reported event has been deemed handling damage (over-tightened connection).The directions for use supplied with the reported convenience kit contains warning: "ensure that you are making secure connections when using this device to prevent the introduction of air into the system.All connections should be finger tightened.Over-tightening can cause cracks and leaks to occur." examine product carefully for entrapped air and fully de-bubble prior to injection to minimize the potential for embolism." (b)(4).
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