不同艾条直径和施灸距离对大鼠穴区皮肤表面温度的影响

Influence of moxibustion with moxa sticks with different diameters and at different distances from surface of“Zusanli”(ST36)on local skin temperature in rats

目的:观察不同直径艾条在不同距离施灸对大鼠"足三里"穴区局部皮肤表面温度的影响,探讨动物艾灸实验中艾条规格和施灸距离的选择标准。方法:雄性SD大鼠120只,随机分为20组,每组6只。艾条直径分为0.5、0.9、1.2、1.8 cm,设置5种施灸距离(1、2、3、4、5 cm),每组选取其中1种规格的艾条在上述1个施灸距离上对大鼠右侧"足三里"穴区进行艾灸,施灸时间均为10 min,左侧"足三里"穴区不施灸作对照观察。使用红外测温仪每30 s扫描1次施灸穴区和对照穴区的皮肤表面温度并记录,对比各组大鼠的穴区皮肤表面温度变化。结果:施灸中,大鼠"足三里"穴区的皮肤表面温度总体表现为波动性升高,施灸穴区皮肤表面温度总体随艾条直径增加而升高,随施灸距离增加而降低。0.5 cm直径艾条在1 cm以上距离艾灸时的皮肤表面温度较难达到40℃以上;0.9 cm直径艾条在2 cm距离内施灸时穴区皮肤表面温度上升后能维持在43~55℃;1.2 cm直径艾条在3 cm以内施灸的皮肤表面温度可达到43℃;1.8 cm直径艾条在3~5 cm施灸的皮肤表面温度上升后能维持在43~61℃,距离1~2 cm施灸时的皮肤表面温度上升后可维持在71~93℃,并引起局部明显灼伤现象。结论:从艾灸过程大鼠皮肤表面温度变化考虑,在动物艾灸实验中需要根据实际情况选择合适规格的艾条,并控制适宜的施灸距离。0.5 cm直径的艾条施灸距离建议小于1 cm;0.9 cm直径的艾条施灸距离以1~2 cm为宜;1.2 cm直径的艾条施灸距离以2~3 cm为宜;1.8 cm直径的艾条施灸距离以3~5 cm为宜。

Objective To observe the impact of moxa-stick with different diameters and at different distances on skin temperature in local"Zusanli"(ST36)region,so as to select suitable specifications for moxibustion.Methods A total of 120 male SD rats were randomly divided into diameters of 0.5,0.9,1.2 and 1.8 cm,and distances of 1,2,3,4 and 5 cm groups,with 6 rats in each group.Moxa-stick with different diameters mentioned above was applied to the right ST36(right hind limb)for 10 min every time at different distances(between the ignited moxa-stick tip and the skin)mentioned above,and the left ST36 was used as the control point.The skin temperature was detected by using an infrared thermometer.Results After application of moxibustion to ST36 region,the skin temperature was increased gradually along with the increased diameter of moxa-sticks and decreased along with the increased distance from the ignited moxa-stick tip to the skin.There were no significant changes in the skin temperature of the left control acupoint ST36.The skin temperature was below 40℃,between 43 to 55℃,over 43℃and between 43 to 61℃,when the moxa-stick was 0.5 cm,0.9 cm,1.2 cm and 1.8 cm in diameter,and was kept 1,2,3 and 3 to 5 cm away from the skin surface,respectively.When the moxa-stick with a diameter of 1.8 cm was kept at a distance of 1 to 2 cm,the skin temperature reached 71 to 93℃to cause obvious local burn lesion.Conclusion During moxibustion,the ignited moxa-sticks with diameters of 0.5,0.9,1.2 and 1.8 cm are suitable to be kept less than 1,1 to 2,2 to 3,and 3 to 5 cm away from the skin surface of ST36,respectively.