RESUMEN
The fly ash particle flow was produced by a screw feeder and then ablated by a pulse laser to create plasma. The emission spectra of fly ash were detected by laser-induced breakdown spectroscopy. The present paper focused on the influence of laser energy on the measurement of unburned carbon. Seven groups of pulse laser in the range of 40 to 130 mJ were used to ablate the fly ash particle flow. The results show that the carbon line intensity is increased linearly with the increases in laser energy, but the SNR of carbon line increases in the range of 40 to 90 mJ and then trends to saturation, while the elimination rate of false data decreases. In this experiment, laser energy ranging from 90 to 100 mJ can enhance the plasma emission signal and improve the true spectral data of fly ash particle flow. So laser energy has close correlations with the ablation of the particle flow and the carbon line intensity. Reasonable laser energy is good for the effective ablation of the fly ash particle flow to get plasma spectra signals with good SNR.
RESUMEN
OBJECTIVE: To compare the clinical efficacy between acupuncture with Tiaochong Shugan method by stages based on syndrome differentiation and oral administration of ibuprofen sustained-release capsule in patients with menstrual headache. METHODS: A total of 90 cases with menstrual headache were randomly divided into an acupuncture group (45 cases, 1 case excluded, 3 cases dropped off) and a medication group (45 cases, 3 cases dropped off). The patients in the acupuncture group were treated with acupuncture with Tiaochong Shugan method by stages based on syndrome differentiation; during period of pain attacks, Ganshu (BL 18), Qimen (LR 14), Hegu (LI 4), Taichong (LR 3), Sizhukong (TE 23) through Shuaigu (GB 8) were selected, once a day; during period of pain relief, Qichong (ST 30), Dahe (KI 12), Guanyuan (CV 4), Taixi (KI 3) were selected, once every 1-2 days. The patients in the medication group were treated with oral administration of ibuprofen sustained-release capsule during period of pain attacks. Each menstrual cycle was taken as a course of treatment, and both groups were treated for 3 courses. The headache comprehensive score (HCS), visual analogue scale (VAS) socre, dysmenorrhea symptom score (DSS) were compared before treatment, 1, 2 and 3 courses into treatment and 1, 2, 3 menstrual cycles after treatment; the clinical efficacy was also evaluated. RESULTS: The HCS score at each time point after treatment was lower than that before treatment in the two groups (P<0.05); 2 and 3 menstrual cycles after treatment, the HCS socres in the acupuncture group were lower than those in the medication group (P<0.05). Except for the 2 and 3 menstrual cycles after treatment in the medication group, the VAS score at each time point after treatment was lower than that before treatment in the two groups (P<0.05). Except for 1 menstrual cycle into treatment, the DSS scores in the acupuncture group at each time point after treatment was lower than that before treatment (P<0.05); the DSS socres at 2 and 3 menstrual cycles into treatment and 1 menstrual cycle after treatment were lower than those before treatment in the medication group (P<0.05). Except for 1 menstrual cycle into treatment, the VAS score and DSS score in the acupuncture group were lower than those in the medication group at each time point after treatment (P<0.05). The total effective rate was 82.9% (34/41) in the acupuncture group, which was higher than 73.8% (31/42) in the medication group (P<0.05). CONCLUSION: The analgesic effect of acupuncture with Tiaochong Shugan method by stages based on syndrome differentiation is superior to oral administration of ibuprofen sustained-release capsules, which could effectively prevent the recurrence of menstrual headache, and improve irregular menstruation-related symptoms.