You should hold the transducer far away from the ______ end.

• A. Crystal
• B. Cable
• C. Handle
• D. Connector

Answer: (A)

The main idea here is that the crystal is the active, delicate element of the transducer—it's the tiny piece that actually emits and receives the ultrasound waves. Direct contact with the crystal end, or applying pressure right there, can dampen or damage it, and skin oils or debris can interfere with acoustic coupling. To protect the crystal and maintain consistent energy transmission, you should grip the transducer by the handle and keep your hand away from the crystal end. This also helps prevent undue stress on the crystal and avoids contaminating the active surface that must be in contact with gel and the patient’s skin. The other parts (cable, connector) are not where you want to place your grip; you’re aiming to minimize interference with the crystal while still maneuvering the device effectively.