Hospice pt was placed on 70% fio2 via t-piece delivered at 15 l/min.Oxygen tubing was witnessed by nursing staff to pop off at venturi connection.This was replaced by staff.Pt was found with t-piece on chest and o2 disconnected from flowmeter.Indicator ball noted to be floating at top of meter.Pt expired.Nurse, upon finding pt, reconnected oxygen and during assessment of pt for any vital signs, tubing again dislodged from flow meter.Flowmeter was tested by biomedical department and found it to be delivering oxygen outside of mfr spec.At 15 l, the flowmeter was delivering 20.14 l/min.Utilizing a different oxygen set up mirroring the pt set up in a controlled biomed environment, tubing connected to this flowmeter again popped off at the venturi connection at 10 mins of flow, and once replaced, regulator ball was witnessed to drift to the top of regulator.Once tubing replaced, the system popped off the tubing again at 20 mins of flow.
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