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Table 2 Pulmonary function in 35 patients undergoing surgery for ovarian cancer

From: Influence of perioperative oxygen fraction on pulmonary function after abdominal surgery: a randomized controlled trial

  FiO2 = 0.30 FiO2 = 0.80 P value
  (n = 15) (n = 20)  
PaO2/FiO2 (kPa)    
5 min after intubation * 69 [53–71] 60 [47–69] 0.25
30 min after intubation 58 [37–72] 58 [44–67] 0.39
End of anesthesia 58 [40–70] 57 [46–67] 0.10
90 min after extubation 56 [37–60] 50 [42–57] 0.66
FRC (mL) #    
Preoperative 1993 [1610–2240] 1875 [1545–2048]  
2 h after extubation 1615 [1375–2318] 1633 [1343–1948] 0.70
Arterial oxygen saturation    
Preoperative (%) § 97 ± 2 96 ± 2  
≤ 95% 2 h after extubation § 3 (20%) 6 (33%) 0.50
≤ 95% 3 days after surgery § 2 (13%) 7 (35%) 0.15
Atelectasis ‡    
No atelectasis 13 (87%) 15 (75%) 0.51
Plate atelectasis 0 0  
Segmental atelectasis 1 (7%) 0  
Partial lobar atelectasis 0 0  
Complete atelectasis of one    
lung lobe 0 2 (10%)  
Complete atelectasis of one    
lung lobe in addition to any of    
the above 1 (7%) 3 (15%)  
  1. The data are presented as mean ± SD, number of patients (percentage) or median [interquartile range].
  2. P values are calculated by Mann–Whitney test to compare the changes from baseline values between the two groups.
  3. PaO2 = arterial oxygen tension; FiO2 = inspired oxygen fraction; PaO2/FiO2 = oxygenation index;
  4. FRC = functional residual capacity.
  5. * Measured at FiO2 =1.0.
  6. # Preoperative data were missing in 9 patients. Postoperative data were missing in 15 patients (Figure 1).
  7. § Measured with the patient breathing room air.
  8. ‡ Severity of atelectasis assessed according to Joyce et al. modification [20] of Wilcox severity scoring [21].