一、前言在Ｂｅａｃｈｅｒ首次描述测痛及镇痛方法后４０年的今天，镇痛药物的研究仍存在多种多样的问题。其中最明显而很重要的是，有许多需要比较的不同药物、剂量、给药途径和疼痛性疾患，使任何有意义的比较都变得十分困难。在这方面已做了大量对照研究，也发表了许多... I. Preface In the 40 years since Beacher first described pain relief and analgesic methods, there are still many problems in the study of analgesics. The most obvious and important of all is that there are many different medications, dosages, routes of administration, and painful conditions that need to be compared to make any meaningful comparison very difficult. A lot of comparative studies have been done in this area, and many have also been published ...