Research Article
[Retracted] Clinical Observation of General Anesthesia Combined with Spinal Anesthesia in Elderly Patients with Chronic Obstructive Pulmonary Disease
Figure 9
Changes in P3 latency and amplitude of EMG signal during the perioperative period. , #, and & meant to the value in the control and observation groups before surgery and that in the control group at the same time point, respectively.