6  Transesophageal Transducer 
Instructions for Use  6 - 27 
Temperature Controls and Safeguards (V7M) 
  WARNING: Disconnect the transducer if the system displays the message indicating that the 
maximum thermal limit is exceeded. (The transducer temperature is 43°C or higher.) Failure to 
disconnect a transesophageal transducer that has exceeded the maximum thermal limit can 
burn the patient's esophagus. Reconnect the transducer after the transducer has cooled. Or, 
use a different transducer. 
Because some concerns have been raised about possible thermal injury to the esophagus due 
to the local buildup of heat during transesophageal echocardiography, the transesophageal 
transducer incorporates a shut-off mechanism in the interest of patient safety in the unlikely 
event overheating should occur. For additional information on temperature limitation, refer to 
EN 60601-2-37 and IEC 60601-2-37. 
A temperature sensor mounted in the distal tip of the transducer monitors the temperature of 
the scanning array and displays the temperature on the screen. 
  When the temperature is 37°C or below, the temperature indicator displays <37°C. 
  When the temperature is above 37°C, the system displays the actual temperature. When 
the temperature reaches 40°C, the temperature indicator is highlighted. 
 
Lens Temp: 40°C 
Example of temperature indicator displayed above scan plan icon. 
  When the temperature reaches 41°C and you choose to override the software and 
continue to scan the patient, OVERRIDE displays next to the scan plane icon. 
 
 
OVERRIDE 
Example of temperature indicator displayed above scan plan icon.