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Table 5 Patients with lowest SPO2 < 95% and oxygen pressure (PaO2) in the arterial blood gas during the therapy (PO2: n = 18 in flexible group and n = 17 in rigid group recorded in the anesthesia note)

From: Safety application of muscle relaxants and the traditional low-frequency ventilation during the flexible or rigid bronchoscopy in patients with central airway obstruction: a retrospective observational study

  N (%) P value
Flexible (204) Rigid (171) Total (375)
The Lowest SPO2
 < 90% 8 (3.9%) 5 (2.9%) 13 (3.5%) 0.475
 90% ~ 95% 15 (7.3%) 18 (10.5%) 33 (8.8%)  
 PaO2 (mmHg) 293.2 ± 174.66 204.1 ± 158.90 253.9 ± 171.37 0.134