Chronic pain, especially the chronic neuropathic pain syndrome characterized by long duration, slow recovery and difficulty to control in clinic practice makes it more serious physically and psychologically. Nowadays,...Chronic pain, especially the chronic neuropathic pain syndrome characterized by long duration, slow recovery and difficulty to control in clinic practice makes it more serious physically and psychologically. Nowadays, the field of chro nic neuropathic pain has been grasping more and more attention. The present stud y aims at investigating the optimal interval parameter of the electroacupunctur e (EA) treatment. L 5/L 6 nerve ligation model was used to assess the effect o f EA on neuropathic pain. Mechanical allodynia was assessed by 50% paw withdrawal t hreshold and cold induced ongoing pain was detected by the number of paw lifts within 5 minutes when free rat was put on to 5±1 ℃ cold plate. Han’s Acupoint Nerve Stimulator (HANS) was connected to needles inserted into acupo ints "Jiaji"(EX B 2/L 5) and "Weizhong" (BL 40) on both sides. Other parame ters were: intensity of 0.5～ 1 mA, 1～2 mA , ten minutes each; frequency of 2 H z; and 0.6 ms in pulse width. Different interval parameter was Q 1 day (one tr eatment/day), Q 2 day, Q 3 day and Q 4 day. Results: Optimal interval pla ys a critical r ole for the analgesic effect of electroacupuncture. The interval of Q 1 day ha s a declining analgesic effect or even not any effect. The other 3 groups have accumulative effect and long lasting analgesic effect (24 hours for mechanical allodynia and 1 week for cold induced ongoing pain). Compared with the control, there is a significant difference (P<0.01 or 0.001). Among these 4 in tervals, Q 3 day group is the best. Longer lasting analgesic effect following this interval choice (48 hours for mechanical allodynia and 10 days for cold i nduced ongoing pain). Amongst the 4 interval parameters, Q 3 day group has don e better effect than the others(P<0.01 or 0.001). The results indicate that one EA treatment every 3 days is the optimal interval. And it may have som ething to do with the clinical practice.展开更多
Pain and hyperalgesia occured when L 5 and L 6 spinal nerves were ligated. To ev aluate the electrophysiological changes that contribute to this sensory patholog y, whole cell current clamp recording was performed in ...Pain and hyperalgesia occured when L 5 and L 6 spinal nerves were ligated. To ev aluate the electrophysiological changes that contribute to this sensory patholog y, whole cell current clamp recording was performed in DRGs that was obtained from neuropathic pain and control rats. After nerve ligation, action potential threshold reduced (more negative) in b oth small and median sized DRG neurons (-18.98±0.69 mV vs -11.12±1.06 mV in c ontrol small sized neurons; -19.44 ±2.22 mV vs -14.55±1.81 mV in control m edi an sized neurons), but resting membrane potential action potential duration at half amplitude (APD 1/2 ) and action potential amplitude did not change sign ifica ntly. In addition, obvious membrane potential oscillations were observed in smal l sized DRG neurons from neuropathic pain rats (P<0.05 compared with control group). These results suggested that neuropathic pain increased the exci tability of nociceptors, which may be an important mechanism underlying peripher al hypersensitivity.展开更多
目的:研究干扰素-α(IFN-α)对神经源性痛的镇痛作用及可能机制,为临床治疗神经源性痛筛选新的、毒副作用小的镇痛药物奠定基础。方法:单侧L5/L6脊神经结扎痛模型小鼠腹腔注射不同剂量IFN-α(1.0,2.5和5.0×106U/kg)后,利用机械刺...目的:研究干扰素-α(IFN-α)对神经源性痛的镇痛作用及可能机制,为临床治疗神经源性痛筛选新的、毒副作用小的镇痛药物奠定基础。方法:单侧L5/L6脊神经结扎痛模型小鼠腹腔注射不同剂量IFN-α(1.0,2.5和5.0×106U/kg)后,利用机械刺激和冷刺激诱发的痛觉超敏实验测定模型小鼠患侧脚掌给药前后的痛阈变化;同时,通过给药前30m in注射纳洛酮(1mg/kg)观察阿片受体拮抗剂对其镇痛作用的影响。结果:腹腔注射IFN-α可产生剂量依赖性镇痛作用,其中5.0和2.5×106U/kg IFN-α均可产生明显的镇痛作用,镇痛效应分别维持60和30 m in,而1.0×106U/kgIFN-α无明显的镇痛作用。IFN-α产生的镇痛效应可被阿片受体拮抗剂纳洛酮完全阻断。结论:IFN-α对小鼠神经源性痛具有镇痛作用,其镇痛效应可能通过阿片受体介导。展开更多
目的:观察超声引导下内热针治疗脊神经后支源性腰痛的临床疗效。方法:2021年10月-2022年3月十堰市太和医院康复科收治的脊神经后支源性腰痛患者60例,随机分为两组,每组各30例。研究组采用超声引导腰脊神经后支支配区内热针治疗,对照组...目的:观察超声引导下内热针治疗脊神经后支源性腰痛的临床疗效。方法:2021年10月-2022年3月十堰市太和医院康复科收治的脊神经后支源性腰痛患者60例,随机分为两组,每组各30例。研究组采用超声引导腰脊神经后支支配区内热针治疗,对照组采用常规针刺疗法。行视觉模拟评分法(visual analog scale,VAS)、腰椎活动度评分评估两组患者在治疗后1 d、1周及6月的临床疗效,比较两组总有效率,并统计不良反应发生情况。结果:与对照组相比,研究组患者治疗后1周及6月后VAS评分显著降低(P<0.05);研究组治疗后6月腰椎活动度比对照组显著提高(P<0.05);研究组总有效率明显高于对照组(P<0.05)。两组患者均未见特殊并发症及不良反应。结论:超声引导下行内热针治疗能更有效地缓解疼痛,临床操作安全易行,疗效较好。展开更多
文摘Chronic pain, especially the chronic neuropathic pain syndrome characterized by long duration, slow recovery and difficulty to control in clinic practice makes it more serious physically and psychologically. Nowadays, the field of chro nic neuropathic pain has been grasping more and more attention. The present stud y aims at investigating the optimal interval parameter of the electroacupunctur e (EA) treatment. L 5/L 6 nerve ligation model was used to assess the effect o f EA on neuropathic pain. Mechanical allodynia was assessed by 50% paw withdrawal t hreshold and cold induced ongoing pain was detected by the number of paw lifts within 5 minutes when free rat was put on to 5±1 ℃ cold plate. Han’s Acupoint Nerve Stimulator (HANS) was connected to needles inserted into acupo ints "Jiaji"(EX B 2/L 5) and "Weizhong" (BL 40) on both sides. Other parame ters were: intensity of 0.5～ 1 mA, 1～2 mA , ten minutes each; frequency of 2 H z; and 0.6 ms in pulse width. Different interval parameter was Q 1 day (one tr eatment/day), Q 2 day, Q 3 day and Q 4 day. Results: Optimal interval pla ys a critical r ole for the analgesic effect of electroacupuncture. The interval of Q 1 day ha s a declining analgesic effect or even not any effect. The other 3 groups have accumulative effect and long lasting analgesic effect (24 hours for mechanical allodynia and 1 week for cold induced ongoing pain). Compared with the control, there is a significant difference (P<0.01 or 0.001). Among these 4 in tervals, Q 3 day group is the best. Longer lasting analgesic effect following this interval choice (48 hours for mechanical allodynia and 10 days for cold i nduced ongoing pain). Amongst the 4 interval parameters, Q 3 day group has don e better effect than the others(P<0.01 or 0.001). The results indicate that one EA treatment every 3 days is the optimal interval. And it may have som ething to do with the clinical practice.
文摘Pain and hyperalgesia occured when L 5 and L 6 spinal nerves were ligated. To ev aluate the electrophysiological changes that contribute to this sensory patholog y, whole cell current clamp recording was performed in DRGs that was obtained from neuropathic pain and control rats. After nerve ligation, action potential threshold reduced (more negative) in b oth small and median sized DRG neurons (-18.98±0.69 mV vs -11.12±1.06 mV in c ontrol small sized neurons; -19.44 ±2.22 mV vs -14.55±1.81 mV in control m edi an sized neurons), but resting membrane potential action potential duration at half amplitude (APD 1/2 ) and action potential amplitude did not change sign ifica ntly. In addition, obvious membrane potential oscillations were observed in smal l sized DRG neurons from neuropathic pain rats (P<0.05 compared with control group). These results suggested that neuropathic pain increased the exci tability of nociceptors, which may be an important mechanism underlying peripher al hypersensitivity.
文摘目的:研究干扰素-α(IFN-α)对神经源性痛的镇痛作用及可能机制,为临床治疗神经源性痛筛选新的、毒副作用小的镇痛药物奠定基础。方法:单侧L5/L6脊神经结扎痛模型小鼠腹腔注射不同剂量IFN-α(1.0,2.5和5.0×106U/kg)后,利用机械刺激和冷刺激诱发的痛觉超敏实验测定模型小鼠患侧脚掌给药前后的痛阈变化;同时,通过给药前30m in注射纳洛酮(1mg/kg)观察阿片受体拮抗剂对其镇痛作用的影响。结果:腹腔注射IFN-α可产生剂量依赖性镇痛作用,其中5.0和2.5×106U/kg IFN-α均可产生明显的镇痛作用,镇痛效应分别维持60和30 m in,而1.0×106U/kgIFN-α无明显的镇痛作用。IFN-α产生的镇痛效应可被阿片受体拮抗剂纳洛酮完全阻断。结论:IFN-α对小鼠神经源性痛具有镇痛作用,其镇痛效应可能通过阿片受体介导。
文摘目的:观察超声引导下内热针治疗脊神经后支源性腰痛的临床疗效。方法:2021年10月-2022年3月十堰市太和医院康复科收治的脊神经后支源性腰痛患者60例,随机分为两组,每组各30例。研究组采用超声引导腰脊神经后支支配区内热针治疗,对照组采用常规针刺疗法。行视觉模拟评分法(visual analog scale,VAS)、腰椎活动度评分评估两组患者在治疗后1 d、1周及6月的临床疗效,比较两组总有效率,并统计不良反应发生情况。结果:与对照组相比,研究组患者治疗后1周及6月后VAS评分显著降低(P<0.05);研究组治疗后6月腰椎活动度比对照组显著提高(P<0.05);研究组总有效率明显高于对照组(P<0.05)。两组患者均未见特殊并发症及不良反应。结论:超声引导下行内热针治疗能更有效地缓解疼痛,临床操作安全易行,疗效较好。
