Keywords Esophageal neoplasm;Lung neoplasm;Thoracotomy;Chronic pain;Acute pain;Ropivacaine;Morphine;Analgesia;

• 食管肿瘤;肺肿瘤;开胸术;慢性疼痛;急性疼痛;罗哌卡因;吗啡;镇痛;