The dial flowmeters in pacu without float balls are a patient safety issue.If these are set between détentes there is no oxygen flow and no indication that there is no oxygen flow.Anesthesiologist noticed excessive expiratory humidity in his patient's mask and he determined that the flowmeter was sluggish and stuck between settings causing zero o2 flow.Thankfully, the patient maintained spo2 99%.Recommendation was to remove all non float ball flowmeters from service due to faulty design and replace them with flowmeters that use float balls.The dial flowmeters are being discarded.Incidentally, the dial flowmeters do have an indication written on the device that states, "no flow between settings." this is the manufacturer's warning to users of the issue identified by the anesthesiologist.
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