Double Lumen Tubes: Usage and Performance by Frequent and Infrequent Users
Table 2
Hypoxia, hypercarbia, and high airway pressures in patients of frequent and infrequent double lumen tube users.
Frequent ()
Infrequent ()
Cases with SpO2 < 90%
79
14
0.339
Mean duration ± SD (min)
7.4 ± 5.6
7.0 ± 4.3
0.493
Mean lowest SpO2 ± SD (%)
85 ± 4
82 ± 6
<0.005
Cases with EtCO2 > 45 mmHg
217
34
0.348
Mean duration ± SD (min)
9.3 ± 9.4
15.1 ± 20.0
<0.01
Mean highest EtCO2 ± SD
51 ± 5
54 ± 6
<0.02
Cases with PIP > 35 cm H2O
552
57
0.308
Mean duration ± SD (min)
18.4 ± 18.7
22.3 ± 22.6
0.057
Mean highest PIP ± SD
43 ± 5
45 ± 7
<0.005
Values for continuous data are reported as mean ± standard deviation and compared by testing. Categorical data were compared by analysis. SD: standard deviation; PIP: peak inspiratory pressure.
