国际麻醉学与复苏杂志   2015, Issue (2): 2-2
    
罗哌卡因切口周围局部浸润对大鼠慢性术后疼痛的抑制作用
沈羽, 徐黎, 刘廪, 顾小萍, 马正良1()
1.徐州医学院
The effect of local infiltration around the incision with ropivacaine on chronic postoperative pain in rats
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摘要:

目的 评价术中不同浓度罗哌卡因切口周围局部浸润对慢性术后疼痛的抑制作用。 方法 雄性SD大鼠30只,体重180 g~220 g,按随机数字表法分为5组,每组6只:假手术组(S组)、生理盐水组(R0组)、0.5%罗哌卡因组(R1组)、0.75%罗哌卡因组(R2组)、1%罗哌卡因组(R3组)。按Flatters法制作皮肤/肌肉切开牵拉模型(skin/muscle incision and retraction, SMIR),S组大鼠除未进行SMIR之外其他操作均与其他组相同。应用von Frey细丝法测定术前及术后1、3、7、10、14、17、21、24、28 d的机械缩足反射阈值(paw withdrawal mechanical threshold, PWMT)。 结果 各组术前PWMT基础值差异无统计学意义(P>0.05);与R0组比较,R1组PWMT于术后1、3、7、10、14、17、24 d升高[(20.9±3.7)、(14.8±4.6)、(15.8±4.4)、(13.9±1.6)、(9.8±0.8)、(10.2±1.3)、(10.3±2.7) g](P<0.05),R2组[(21.0±5.2)、(21.3±3.9)、(15.3±4.1)、(18.4±3.3)、(12.1±1.1)、(11.5±1.6)、(14.1±1.9)、(13.2±3.0)、(9.5±2.4) g]和R3组[(22.2±2.9)、(22.5±4.1)、(22.1±4.7)、(23.8±0.9)、(18.2±3.2)、(15.7±3.2)、(21.3±3.9)、(18.4±4.2)、(21.0±4.2) g]PWMT在术后所有时间点均升高(P<0.05)。 结论 术中罗哌卡因切口周围局部浸润可以抑制慢性术后疼痛。

关键词: 术后慢性疼痛; 罗哌卡因; 皮肤/肌肉切开牵拉模型
Abstract:

Objective To investigate the effect of local infiltration around the incision with ropivacaine on chronic postoperative pain in rats. Methods Thirty male SD rats, weighing 180 g-220 g, were randomly divided into 5 groups(n=6): sham group(group S), skin/muscle incision and retraction(SMIR)+saline group(group R0), SMIR+0.5% ropivacaine group(group R1), SMIR+0.75% ropivacaine group(group R2), SMIR+1% ropivacaine group(group R3). SMIR was duplicated as Flatters described. Paw withdrawal mechanica threshold(PWMT) using von Frey hair was measured 1 d before operation and 1, 3, 7, 10, 14, 17, 21, 24 d and 28 d after operation. Results The PWMT of group R1 was higher than group R0 at 1, 3, 7, 10, 14, 17, 24 d after operation[(20.9±3.7), (14.8±4.6), (15.8±4.4), (13.9±1.6), (9.8±0.8), (10.2±1.3), (10.3±2.7) g](P<0.05). The PWMT of group R2[(21.0±5.2), (21.3±3.9), (15.3±4.1), (18.4±3.3), (12.1±1.1), (11.5±1.6), (14.1±1.9), (13.2±3.0), (9.5±2.4) g] and R3[(22.18±2.9), (22.5±4.1), (22.1±4.7), (23.8±0.9), (18.2±3.2), (15.7±3.2), (21.3±3.9), (18.4±4.2), (21.0±4.2) g] was higher than group R0 at all time points(P<0.05), while the PWMT of all the groups had no significant differences before operation(P>0.05). Conclusions Local infiltration of the incision with ropivacaine can inhibit chronic postoperative pain in rats.

Key words: Chronic postoperative pain; Ropivacaine; Skin/muscle incision and retraction model