Commercial name: ACUSON Diagnostic Ultrasound System. Technical Name: Ultrasonic Apparatus. ANVISA registration number: 10345162017. Class of risk: II. Model affected: ACUSON S2000. Serial numbers affected: 211397; 211771; 211784; 213087; 213596; 213886; 213936; 214179; 214493; 214831; 215336; 215365; 215368; 215383; 215402; 215421