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Table 3 Maximum and minimum tracheal temperatures

From: Measurement of tracheal temperature is not a reliable index of total respiratory heat loss in mechanically ventilated patients

 

Tracheal temperatures (°C)

  

Inspired gas-conditioning

    

device

Maximum

Minimum

Room temperature (°C)

Body temperature (°C)

HH

    

   45 min

35.7 ± 1.0

34.3 ± 1.0

23.6 ± 0.9

37.8 ± 1.0

 

(35.1-36.5)

(33.5-35.1)

(22.5-24.9)

(36.4-39.1)

   24 h

35.9 ± 0.9

34 ± 1.0

23.3 ± 1.0

37.4 ± 0.9

 

(35.2-37.1)

(33.2-34.9)

(22.6-25.0)

(36.3-38.4)

Hydrophobic HME

    

   45 min

35.4 ± 1.2

32.0 ± 1.2

23.6 ± 0.9

37.9 ± 1.0

 

(33.4-37.3)

(30.4-33.2)

(22.6-25.0)

(36.1-39.0)

   6 h

35.5 ± 0.8

32.6 ± 0.8

23.6 ± 0.9

37.9 ± 1.0

 

(34.4-36.7)

(31.3-33.4)

(22.0-24.9)

(36.0-39.4)

   24 h

35.3 ± 0.7

32.4 ± 1.1

23.6 ± 1.0

37.3 ± 0.8

 

(34.4-36.1)

(30.5-32.9)

(21.9-24.2)

(36.3-38.4)

Hygroscopic HME

    

   45 min

36.3 ± 0.8

34.2 ± 0.9

23.6 ± 1.0

37.4 ± 1.1

 

(35.0-36.9)

(33.1-34.8)

(21.9-24.6)

(36.1-39.5)

   6 h

36.2 ± 0.9

34.2 ± 0.7

23.4 ± 1.5

37.9 ± 1.0

 

(35.0-37.3)

(33.4-35.0)

(20.8-24.2)

(36.5-39.2

   24 h

36.2 ± 0.8

34.3 ± 1.2

23.0 ± 1.2

37.8 ± 0.8

 

(35.5-37.8)

(32.5-37.7)

(20.8-24.4)

(36.5-38.8)

  1. Room temperature was measured at the patients' bedsides. Body temperature was obtained in the oesophagus. Values are expressed as mean ± standard deviation (range).