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Table 3 Arterial respiratory gas modifications at the five times of the study

From: Effects on respiratory function of the head-down position and the complete covering of the face by drapes during insertion of the monitoring catheters in the cardiosurgical patient

    

Times

  

Function

Group

1

2

3

4

5

PaO2

A1

69.6 ± 5

111.9 ± 28

147.2 ± 41*

157 ± 42

116 ± 25*

(mmHg)

A2

78.6 ± 8

 

78.1 ± 8

82.7 ± 9

78.7 ± 14

 

B1

68.8 ± 8

97.8 ± 17

146.5 ± 33*

156.6 ± 40

102.5 ± 13*

 

B2

87.9 ± 19

 

82 ± 12

88.2 ± 10

86.7 ± 10

 

C

81.3 ± 11

144.8 ± 27

208.7 ± 35*‡

233.7 ± 37*†‡

152.2 ± 31*‡

SaO2

A1

94.2 ± 1.4

97.7 ± 1.3

98.6 ± 0.9*

98.9 ± 0.5

98 ± 1*

(%)

A2

95.4 ± 1.3

 

95.3 ± 1.3

96 ± 1.2

95 ± 2.2

 

B1

93.7 ± 2.1

97.1 ± 1.5

98.7 ± 0.5*

98.8 ± 0.5

97.4 ± 1*

 

B2

96.2 ± 3.3

 

96 ± 1.6

96.8 ± 1.1

96.7 ± 1.1

 

C

96.4 ± 1.3

98.9 ± 0.3

99.4 ± 0.2*‡

99.6 ± 0.1*†‡

99 ± 0.4*‡

PaCO2

A1

39.2 ± 4

40.1 ± 4

40.3 ± 4

41.2 ± 4

40 ± 5

(mmHg)

A2

40.9 ± 3

 

41.3 ± 4

41.1 ± 5

41.1 ± 5

 

B1

39 ± 4

40.1 ± 5

41.6 ± 5

43.6 ± 6

43.8 ± 7

 

B2

38.9 ± 4

 

40.8 ± 4

40.6 ± 5

38.5 ± 3

 

C

35.9 ± 4

36.3 ± 6

37.5 ± 5

36.3 ± 4

35.6 ± 5

  1. *P<0.05, versus the previous time withineach group; P <0.05, versus time 2 within eachgroup; P <0.05, versus groups A1 and B1 in thecorrespondent time. PaO2, arterial oxygen tension; SaO2,arterial oxygen saturation; PaCO2, arterial carbon dioxide tension.For a definition of the groups and times, please see text.