Customer reported that the desaturation of the o2 to the patient was due to the blender malfunctioning, since the flow was improperly administered due to mismatch of the mixer, there was no patient injury or delay in treatment due to this issue.Post event the customer reports that they reviewed the system and wiring and the oxygen source was changed and 100% f02 was placed for immediate improvement.Customer reports that they did a performance verification of the mixer prior to being placed into use with the patient, flow check of the mixer and measurement of the flows and fi02% were done.The customer reported the last preventative maintenance completed on the mixer was in march.
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