SonoSite TEExi, User Manual, Page: 37 / 52

Safety 5-3
Thermal safety
Experts generally agree that to avoid damage to body tissues during long-term exposures, the temperature
of the transducer tip where contacting tissue should be less than 43° C.
A thermal-safety system in the ultrasound system displays the transducer’s operating temperature
on-screen and prevents it from exceeding given limits.
If the temperature sensor is not working properly when you connect the transducer to the system, the image
freezes and a warning appears.
Thermal limits
The system has two levels of upper thermal limit: 41.0° C and 42.5° C. If the transducer-tip temperature
reaches 41.0° C, the temperature is highlighted on-screen, the image freezes, and a warning appears. This
warning appears only once per exam. To continue, press OK. If the temperature reaches 42.5° C, the image
freezes and cannot be unfrozen until the temperature falls below 42.0° C. To resume imaging, press the
FREEZE
or
UNFREEZE
key.
The system has a lower thermal limit of 17.5° C. If the transducer-tip temperature reaches 17.5° C, the
temperature is highlighted on-screen, and the image freezes and cannot be unfrozen until the temperature
rises above 18.0° C. To resume imaging, press the
FREEZE
or
UNFREEZE
key.
Figure 5-1 Transducer-tip temperature on-screen: Within limit (left) and outside limit (right)
Cautions

To avoid damaging the equipment, clean and disinfect the transducer using the
recommended procedures only.

To avoid damaging the transducer, the TEExi transducer shall be handled only by
trained personnel. The TEExi transducer is a precision instrument and can be
inadvertently damaged.
Temperature