It was indicated that a speed issue occurred, and the procedure was cancelled.A rotapro console was selected for use.During the procedure, the speed (rpm) was inconsistent.It was attempted to set the rpm to 160k, and the unit was non-responsive with a fluctuation between 170k and 70k rpms.The speed started at 180k rpms and was inconsistently fluctuating up and down, as low as 160k rpms.Consequently, each time the speed would fluctuate, a deceleration speed error message was displayed (yellow solid triangle alert).The desired operational speed was never achieved.There was no indication that the device was over pressurized.The procedure was not completed due to the event.
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