Vyaire medical file identification: (b)(4).H3:81 other: at this time, the suspect device has not been returned for evaluation.Therefore, root cause has not been determined yet.The customer mentioned that the unit pm was last (b)(6).Technical support recommended calibrating the o2 sensor and flow analyzer,perform blender calibration and check the 40psi reg o-ring at the flow orifice.Vyaire medical will submit a supplemental report in accordance with 21 cfr section 803.56 if additional information becomes available.
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