A customer reported experiencing no ultrasound at the beginning of surgery on a patient's right eye.The phaco handpiece was retested and then exchanged, but the issue persisted.The surgeon settings were changed to reflect another doctor's settings, and the case could be completed.Zonular disinsertion occurred and a capsular tension ring was implanted.After the surgery, the initial doctor's settings were checked and the staff noticed that ultrasound energy was set at 0.Additional information has been requested but not received to date.
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