To investigate the effect of ultrasound-guided thoracic paravertebral nerve block on postoperative acute and chronic pain and cognitive function in elderly patients with thoracoscopic partial lung resection.
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Incidence of POD at one day after surgery
Timeframe: One day after surgery
Incidence of POD at three months after surgery
Timeframe: Three months after surgery
Change in pain assessed by Visual Analogue Scale
Timeframe: Five minutes after extubation
Change in pain assessed by Visual Analogue Scale
Timeframe: One day after surgery
Change in pain assessed by Visual Analogue Scale
Timeframe: Three months after surgery