Which sterilization methods are commonly approved for ultrasound transducers?

• A. Ethylene oxide (ETO) and chemical sterilants
• B. High-temperature autoclave
• C. Open flame sterilization
• D. Ultraviolet exposure only

Answer: (A)

Ultrasound transducers are often heat‑sensitive and have complex surfaces that can’t withstand high heat or simple UV exposure, so sterilization has to be done with low‑temperature methods that still achieve true sterilization. Ethylene oxide is a well-established sterilant used for heat‑sensitive devices; it penetrates complex surfaces and internal channels, and after the process you must aerate the device to remove residual gas before use. Chemical sterilants provide another low‑temperature option for devices that can’t tolerate heat, following proper contact, rinsing, and drying procedures to ensure no residues remain.

In contrast, high‑temperature autoclaves rely on steam and heat, which can damage the transducer’s materials; open flame would risk burning the device, and ultraviolet exposure alone does not reliably sterilize all surfaces or internal pathways. That’s why the commonly approved methods for these probes are low‑temperature sterilization options like ethylene oxide and chemical sterilants.