目的探讨卡前列素氨丁三醇宫体注射联合缩宫素静滴在符合剖宫产指征伴产后出血风险孕妇分娩中的应用效果。方法选取2018年10月至2019年10月焦作市第二人民医院收治的100例符合剖宫产指征伴产后出血风险孕妇作为研究对象,按随机数字表法...目的探讨卡前列素氨丁三醇宫体注射联合缩宫素静滴在符合剖宫产指征伴产后出血风险孕妇分娩中的应用效果。方法选取2018年10月至2019年10月焦作市第二人民医院收治的100例符合剖宫产指征伴产后出血风险孕妇作为研究对象,按随机数字表法分为研究组和对照组,各50例。均接受剖宫产分娩,并在胎儿娩出后接受麦角新碱治疗,在此基础上对照组接受缩宫素预防产后出血,研究组接受卡前列素氨丁三醇联合缩宫素预防产后出血。比较两组产后出血发生情况,比较两组产后1 d血红蛋白(Hb)、红细胞比容(Hct)下降值,比较两组产后氧化应激[丙二醛(MDA)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-px)、超氧化物歧化酶(SOD)]水平,比较两组不良反应发生情况。结果研究组产后出血发生率[8.00%(4/50)]低于对照组[26.00%(13/50)],差异有统计学意义(P<0.05)。研究组产后1 d Hb、Hct下降值均小于对照组,差异有统计学意义(P<0.05)。手术结束时、手术结束1 d研究组MDA低于对照组,而CAT、GSH-px、SOD高于对照组,差异有统计学意义(P<0.05)。两组不良反应发生率比较,差异无统计学意义(P>0.05)。结论卡前列素氨丁三醇宫体注射联合缩宫素静滴在符合剖宫产指征伴产后出血风险孕妇分娩中的应用效果确切,可有效降低产后出血发生率,且安全性可。展开更多
A novel dual-loop optoelectronic oscillator(OEO),which is constructed based on all optical signal processing,is proposed and analyzed.By inserting an erbium-doped fiber amplifier(EDFA) and a fiber Bragg grating(FBG) o...A novel dual-loop optoelectronic oscillator(OEO),which is constructed based on all optical signal processing,is proposed and analyzed.By inserting an erbium-doped fiber amplifier(EDFA) and a fiber Bragg grating(FBG) on the optical domain,the amplification and filter are implemented in the OEO loop.The performance of the OEO is improved without any electronic filter or electronic amplifier.A theoretical analysis is performed,and the generated microwave signal exhibits good performance with phase noise lower than -120 dBc/Hz at 10 kHz and a high side-mode suppression ratio(SMSR).展开更多
A new optical label switching system with coherently detected implicit spectral amplitude code (SAC) labels is proposed in this paper. The implicit SAC labels are recognized using a frequency-swept local light source ...A new optical label switching system with coherently detected implicit spectral amplitude code (SAC) labels is proposed in this paper. The implicit SAC labels are recognized using a frequency-swept local light source oscillator. An explicit SAC-label switching system with 40 Gbit/s intensity modulation (IM) payloads and 156 Mbit/s label and an implicit SAC-label switching system with 2.5 Gbit/s IM payloads and 156 Mbit/s label are both considered. Label and payload bit error rate (BER) performance is assessed and compared by simulations. The results reveal that after 80 km transmission and at the BER of 10-9, the received optical power (ROP) values of label and payload are -8.3 dBm and -23.5 dBm in implicit SAC-label switching system, respectively, while those are -18.2 dBm and -18.6 dBm in explicit SAC-label switching system, respectively. As a result, the payloads of 40 Gbit/s and 2.5 Gbit/s in explicit/implicit SAC-label switching system have little influence on the received payload quality at the BER of 10-9 after 80 km transmission. Finally, a payload of 40 Gbit/s can obtain 12.5 dB optical signal-to-noise ratio (OSNR) after 80 km transmission.展开更多
文摘目的探讨卡前列素氨丁三醇宫体注射联合缩宫素静滴在符合剖宫产指征伴产后出血风险孕妇分娩中的应用效果。方法选取2018年10月至2019年10月焦作市第二人民医院收治的100例符合剖宫产指征伴产后出血风险孕妇作为研究对象,按随机数字表法分为研究组和对照组,各50例。均接受剖宫产分娩,并在胎儿娩出后接受麦角新碱治疗,在此基础上对照组接受缩宫素预防产后出血,研究组接受卡前列素氨丁三醇联合缩宫素预防产后出血。比较两组产后出血发生情况,比较两组产后1 d血红蛋白(Hb)、红细胞比容(Hct)下降值,比较两组产后氧化应激[丙二醛(MDA)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-px)、超氧化物歧化酶(SOD)]水平,比较两组不良反应发生情况。结果研究组产后出血发生率[8.00%(4/50)]低于对照组[26.00%(13/50)],差异有统计学意义(P<0.05)。研究组产后1 d Hb、Hct下降值均小于对照组,差异有统计学意义(P<0.05)。手术结束时、手术结束1 d研究组MDA低于对照组,而CAT、GSH-px、SOD高于对照组,差异有统计学意义(P<0.05)。两组不良反应发生率比较,差异无统计学意义(P>0.05)。结论卡前列素氨丁三醇宫体注射联合缩宫素静滴在符合剖宫产指征伴产后出血风险孕妇分娩中的应用效果确切,可有效降低产后出血发生率,且安全性可。
文摘A novel dual-loop optoelectronic oscillator(OEO),which is constructed based on all optical signal processing,is proposed and analyzed.By inserting an erbium-doped fiber amplifier(EDFA) and a fiber Bragg grating(FBG) on the optical domain,the amplification and filter are implemented in the OEO loop.The performance of the OEO is improved without any electronic filter or electronic amplifier.A theoretical analysis is performed,and the generated microwave signal exhibits good performance with phase noise lower than -120 dBc/Hz at 10 kHz and a high side-mode suppression ratio(SMSR).
基金the National Natural Science Foundation of China (No.61205067)the Fundamental Research Funds for the Central Universities (No.ZYGX2010J007)the Open Fund of State Key Laboratory of Information Photonics and Optical Communications in Beijing University of Posts and Telecommunications
文摘A new optical label switching system with coherently detected implicit spectral amplitude code (SAC) labels is proposed in this paper. The implicit SAC labels are recognized using a frequency-swept local light source oscillator. An explicit SAC-label switching system with 40 Gbit/s intensity modulation (IM) payloads and 156 Mbit/s label and an implicit SAC-label switching system with 2.5 Gbit/s IM payloads and 156 Mbit/s label are both considered. Label and payload bit error rate (BER) performance is assessed and compared by simulations. The results reveal that after 80 km transmission and at the BER of 10-9, the received optical power (ROP) values of label and payload are -8.3 dBm and -23.5 dBm in implicit SAC-label switching system, respectively, while those are -18.2 dBm and -18.6 dBm in explicit SAC-label switching system, respectively. As a result, the payloads of 40 Gbit/s and 2.5 Gbit/s in explicit/implicit SAC-label switching system have little influence on the received payload quality at the BER of 10-9 after 80 km transmission. Finally, a payload of 40 Gbit/s can obtain 12.5 dB optical signal-to-noise ratio (OSNR) after 80 km transmission.
