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局部麻醉的一个主要缺点,是注射过程中产生疼痛。在局麻药中加入碳酸氢钠使之碱化,可大大减轻注射时的不适感。麻药温度与疼痛的关系虽已有研究报道,但目前尚无定论。作者将136例在三叉神经分布区施行局部麻醉的患者分为4组,每组患者注射的麻药温度分别为10℃,18℃,37℃和42℃,对注射过程中产生的疼痛进行分级(score,0～10级)。结果表明,局麻药液的温度与注射疼痛之间呈高度负相关(r=—
A major drawback of local anesthesia is the pain that occurs during the injection. Adding sodium bicarbonate to the local anesthetic to alkalinize can greatly reduce the uncomfortable feeling during injection. Although the relationship between anesthetic temperature and pain has been reported, it is still inconclusive. The authors divided 136 patients with localized anesthesia in the trigeminal nerve distribution into four groups, each of which received 10, 18, 37 and 42 degrees Celsius for the pain associated with the injection score, 0 ~ 10). The results showed that there was a highly negative correlation between the temperature of the local anesthetic liquid and the injection pain (r = -