Vyaire medical file identification: (b)(4).A vyaire technical support reviewed the suspect device.Initial observations were that the adjust knob was fully counterclockwise, most likely what was causing the lack of, or no pressure in the system.Tuned limit & adjust fully clockwise, and system pressurized just fine.Performed a circuit calibration - ok.Performance test performed ok & passed.Other issues could be the customers circuit, humidifier, or blender.But the vent itself is working fine with no issues.Vyaire medical will submit a supplemental report in accordance with 21 cfr section 803.56 if additional information becomes available.
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