Which component insulates the patient from electrical shock?

Which component insulates the patient from electrical shock?

• A. Case
• B. Electrical shield
• C. Acoustic insulator
• D. PZT

Answer: (A)

Electrical safety hinges on keeping the patient electrically isolated from any live internal parts. The outer case of the transducer provides that dielectric barrier, preventing current from reaching the patient. The electrical shield helps reduce interference but isn’t the primary means of patient insulation. Acoustic insulators deal with sound, not electrical safety, and the PZT is the active piezoelectric element that creates and detects ultrasound—its safety comes from the surrounding case, not from the piezoelectric material itself.

Electrical safety hinges on keeping the patient electrically isolated from any live internal parts. The outer case of the transducer provides that dielectric barrier, preventing current from reaching the patient. The electrical shield helps reduce interference but isn’t the primary means of patient insulation. Acoustic insulators deal with sound, not electrical safety, and the PZT is the active piezoelectric element that creates and detects ultrasound—its safety comes from the surrounding case, not from the piezoelectric material itself.