Document Classification

Section Type: RESULTS

Text: Compared with that of 0 hour, marked improvement in PaO (2) (mm Hg, 1 mm Hg = 0. 133 kPa, single hole exhalation valve group : 70. 410. 2, 78. 7 10. 4, 82. 69. 2, 86. 59. 6, 90. 49. 0, 91. 38. 9 vs. 57. 216. 4 ; plateau exhalation valve group : 71. 112. 3, 77. 911. 6, 83. 38. 9, 85. 98. 2, 89. 48. 2, 92. 18. 5 vs. 56. 917. 2) and obvious lowering of PaCO (2) (mm Hg, single hole exhalation valve group : 76. 311. 9, 74. 112. 7, 71. 311. 2, 67. 410. 5, 65. 48. 2, 61. 47. 9 vs. 85. 719. 2 ; plateau exhalation valve group : 72. 610. 5, 70. 111. 5, 67. 410. 1, 63. 99. 7, 62. 87. 7, 59. 17. 3 vs. 86. 317. 9) were observed at the time points of 2, 4, 8, 24, 48 hours of NIPPV and 24 hours post NIPPV in both groups (all P < 0. 05).