呃逆患者1329例发病特征与疗效回顾性研究

目的:探讨呃逆发病特点与疗效研究。方法:对中国人民解放军中部战区总医院的1 329例呃逆患者年龄特点、病因分布、发病季节、治疗效果、并发症处置进行回顾性对比与总结。结果:呃逆病因构成依次是未见明确病因(28.1%)、腹部疾病(23.8%)、胸部疾病(22.2%)、中枢疾病(13.8%)、颈部疾病(7.9%)、医源性疾病(4.1%)。呃逆好发于冬(33.3%)、春(25.7%)季,春季以胃肠溃疡和肺部疾病多见,夏季以胃肠炎多见,秋季以肝胆疾病多见,冬季以肺部疾病和胸部外伤等多见。2日总有效率合计为77.8%,约22.2%患者转为顽固性呃逆,7日总有效率合计为90.0%,针灸治疗最常见的并发症是针刺点疼痛,发生率为15.1%,其次是晕针、针刺点出血等。结论:掌握呃逆的临床特点有助于对其辨证施治

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies