Research Article
[Retracted] Clinical Observation of General Anesthesia Combined with Spinal Anesthesia in Elderly Patients with Chronic Obstructive Pulmonary Disease
Figure 3
Changes in SaO2 and PaO2 during the perioperative period. # and & suggested in contrast to the value of the observation group at T0 and the value of the control group at the same time point, respectively.