Why is heat sterilization of ultrasound equipment not recommended?

Heat sterilization is not recommended for ultrasound equipment primarily because it can adversely affect the piezoelectric properties of the transducer. Ultrasound transducers are typically made with materials such as lead zirconate titanate, which are specifically engineered to convert electrical energy into acoustic waves. High temperatures can alter the molecular structure of these piezoelectric materials.

When subjected to extreme heat, the functional characteristics of the piezoelectric crystals can change, leading to a loss of their ability to generate sound waves efficiently. This would compromise the performance of the transducer, ultimately affecting the quality of the ultrasound images and the safety of the equipment.

Using methods other than heat, such as chemical sterilization or low-temperature plasma sterilization, is advisable to ensure the integrity of the ultrasonic equipment and its components while still achieving the necessary level of sanitation.