temperature probes

The most commonly used esophageal temperature probe is an 18 Fr Acoustascope model.  The air in the Acoustascope balloon and thick plastic shaft insulate the thermistor and make the response to temperature changes more than 3 times slower than 9-12 Fr smooth shaft models (1), these more effective models cost less than $5. 

 

The 18 Fr Acoustascope balloon also expands to 27 Fr at body temperature, potentially pressing the esophagus against the Left Atrium. Check and see if the same manufacturer of your current 18 Fr temperature probes makes a smaller diameter smooth shaft model.   

 

For faster detection of esophageal temperature changes and no esophageal dilation, a non-insulated small diameter temp probe is a better option.*  Download this sheet for more information including the make and model of preferred devices.