Procedure sedation and data collection
Anxiety, Pain, anxiety, pain, NRS
Baseline data including demographic characteristics, comorbidities, and education years were recorded. Subjective sleep quality at the night before surgery was assessed with the numeric rating score (NRS, a 11-point scale where 0 indicating the best sleep and 10 indicating the worst sleep). Preoperative anxiety was assessed by State Trait Anxiety Inventory-6 (STAI-6, ranged from 6 to 24, with higher score indicating heavier anxiety status) [No premedication was given in prior. Patients received standard monitoring including heart rate (HR), non-invasive systolic blood pressure (SBP) and mean arterial pressure (MAP), respiratory rate (RR), pulse oxygen saturation (SpOUltrasound-guided nerve block was initiated once MOAA/S score reached to 4 or less. A dose of 0.02 mg/kg remimazolam was added for rescue sedation and could be repeated if necessary. Pain intensity was assessed with the numeric rating score (NRS, a 11-point scale where 0 for no pain and 10 for the worst pain) during the block. If patients complained moderate or severe pain (defined as NRS score ≥ 4), a rescued dose of 0.04 μg/kg sufentanil could be added. NRS of pain was recorded as 0 if patients were in deep sedation (MOAA/S score ≤ 1).Once SpO