This is the second of two reports (same incident, different products) mayfield tristar adapter (attached to the a2009 base unit) was attached to plate which was attached to the crw frame.When the doctor wanted to reposition the patient, the adaptor was unscrewed from the plate.When they went to retighten the torque screw on the adaptor, it became stuck and would not fully engage to the plate.The equipment had to be taken apart and the tristar and plate had to be replaced by using another base unit, adaptor and plate.No harm or injury to patient.Surgery delay was 45 minutes.Additional information has been requested.Linked to mfg report number: 3004608878-2015-00322.
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