Bell R W, Butt Z A
Princess Alexandra Eye Pavilion, Royal Infirmary of Edinburgh.
Br J Ophthalmol. 1995 Nov;79(11):1015-7. doi: 10.1136/bjo.79.11.1015.
To test if the simple technique of warming lignocaine reduces the pain of injection during local anaesthetic cataract surgery.
Sixty patients undergoing peribulbar local anaesthesia for cataract surgery were allocated randomly to receive either warm (37 degrees C) or cold (room temperature) plain 2% lignocaine for the injection. Pain was assessed subjectively by asking the patients to score their pain from 0 (no pain) to 10 (most severe pain imaginable).
The mean pain score for the warm group was 2.3 (SD 1.3) in comparison with a mean score of 5.5 (1.0) for the cold group (p < 0.01).
The process of warming lignocaine to 37 degrees C has been found to reduce significantly the pain of injection during peribulbar local anaesthesia. It is recommended that this technique be more widely adopted in order to minimise patient's discomfort.
测试利多卡因简单的温热技术是否能减轻局部麻醉白内障手术中注射时的疼痛。
60例接受球周局部麻醉进行白内障手术的患者被随机分配，分别接受温热（37摄氏度）或冷（室温）的单纯2%利多卡因注射。通过让患者从0（无疼痛）至10（可想象的最剧烈疼痛）对疼痛进行主观评分。
温热组的平均疼痛评分为2.3（标准差1.3），而冷组的平均评分为5.5（1.0）（p<0.01）。
已发现将利多卡因加热至37摄氏度的过程可显著减轻球周局部麻醉时注射的疼痛。建议更广泛地采用该技术，以尽量减少患者的不适。
